Mercurial > hg > toybox

annotate lib/functions.c @ 75:89ca591a9236

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
More random progress on mke2fs. Nothing to see yet.
author Rob Landley <rob@landley.net>
date Tue, 23 Jan 2007 13:20:38 -0500
parents a1b464bbef08
children 8018c40605d9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
1 /* vi: set sw=4 ts=4 :*/
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
2 /* functions.c - reusable stuff.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
3 *
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
4 * Functions with the x prefix are wrappers for library functions. They either
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
5 * succeed or kill the program with an error message, but never return failure.
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
6 * They usually have the same arguments and return value as the function they
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
7 * wrap.
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
8 *
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
9 * Copyright 2006 Rob Landley <rob@landley.net>
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
10 */
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
11
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
12 #include "toys.h"
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
13
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
14 void verror_msg(char *msg, int err, va_list va)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
15 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
16 fprintf(stderr, "%s: ", toys.which->name);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
17 vfprintf(stderr, msg, va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
18 if (err) fprintf(stderr, ": %s", strerror(err));
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
19 putc('\n', stderr);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
20 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
21
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
22 void error_msg(char *msg, ...)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
23 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
24 va_list va;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
25
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
26 va_start(va, msg);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
27 verror_msg(msg, 0, va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
28 va_end(va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
29 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
30
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
31 void perror_msg(char *msg, ...)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
32 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
33 va_list va;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
34
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
35 va_start(va, msg);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
36 verror_msg(msg, errno, va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
37 va_end(va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
38 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
39
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
40 // Die with an error message.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
41 void error_exit(char *msg, ...)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
42 {
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
43 va_list va;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
44
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
45 va_start(va, msg);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
46 verror_msg(msg, 0, va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
47 va_end(va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
48
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
49 exit(toys.exitval);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
50 }
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
51
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
52
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
53 // Die with an error message and strerror(errno)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
54 void perror_exit(char *msg, ...)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
55 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
56 va_list va;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
57
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
58 va_start(va, msg);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
59 verror_msg(msg, errno, va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
60 va_end(va);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
61
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
62 exit(toys.exitval);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
63 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
64
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
65 // Stub until the online help system goes in.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
66 void usage_exit(void)
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
67 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
68 exit(1);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
69 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
70
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
71 // Like strncpy but always null terminated.
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
72 void strlcpy(char *dest, char *src, size_t size)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
73 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
74 strncpy(dest,src,size);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
75 dest[size-1] = 0;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
76 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
77
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
78 // Die unless we can allocate memory.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
79 void *xmalloc(size_t size)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
80 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
81 void *ret = malloc(size);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
82 if (!ret) error_exit("xmalloc");
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
83
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
84 return ret;
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
85 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
86
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
87 // Die unless we can allocate prezeroed memory.
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
88 void *xzalloc(size_t size)
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
89 {
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
90 void *ret = xmalloc(size);
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
91 bzero(ret,size);
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
92 return ret;
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
93 }
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
94
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
95 // Die unless we can change the size of an existing allocation, possibly
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
96 // moving it. (Notice different arguments from libc function.)
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
97 void xrealloc(void **ptr, size_t size)
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
98 {
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
99 *ptr = realloc(*ptr, size);
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
100 if (!*ptr) error_exit("xrealloc");
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
101 }
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
102
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
103 // Die unless we can allocate a copy of this many bytes of string.
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
104 void *xstrndup(char *s, size_t n)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
105 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
106 void *ret = xmalloc(++n);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
107 strlcpy(ret, s, n);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
108
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
109 return ret;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
110 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
111
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
112 // Die unless we can allocate a copy of this string.
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
113 void *xstrdup(char *s)
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
114 {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
115 return xstrndup(s,strlen(s));
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
116 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
117
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
118 // Die unless we can allocate enough space to sprintf() into.
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
119 char *xmsprintf(char *format, ...)
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
120 {
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
121 va_list va;
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
122 int len;
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
123 char *ret;
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
124
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
125 // How long is it?
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
126
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
127 va_start(va, format);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
128 len = vsnprintf(0, 0, format, va);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
129 len++;
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
130 va_end(va);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
131
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
132 // Allocate and do the sprintf()
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
133 ret = xmalloc(len);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
134 va_start(va, format);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
135 vsnprintf(ret, len, format, va);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
136 va_end(va);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
137
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
138 return ret;
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
139 }
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
140
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
141 void xprintf(char *format, ...)
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
142 {
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
143 va_list va;
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
144 va_start(va, format);
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
145
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
146 vprintf(format, va);
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
147 if (ferror(stdout)) perror_exit("write");
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
148 }
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
149
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
150 void xputc(char c)
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
151 {
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
152 if (EOF == fputc(c, stdout)) perror_exit("write");
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
153 }
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
154
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
155 void xflush(void)
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
156 {
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
157 if (fflush(stdout)) perror_exit("write");;
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
158 }
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
159
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
160 // Die unless we can exec argv[] (or run builtin command). Note that anything
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
161 // with a path isn't a builtin, so /bin/sh won't match the builtin sh.
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
162 void xexec(char **argv)
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
163 {
3
266a462ed18c Next drop of toysh, plus more infratructure.
landley@driftwood
parents: 2
diff changeset
164 toy_exec(argv);
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
165 execvp(argv[0], argv);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
166 error_exit("No %s", argv[0]);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
167 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
168
51
63edd4de94dd Add xaccess()
Rob Landley <rob@landley.net>
parents: 50
diff changeset
169 void xaccess(char *path, int flags)
63edd4de94dd Add xaccess()
Rob Landley <rob@landley.net>
parents: 50
diff changeset
170 {
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
171 if (access(path, flags)) perror_exit("Can't access '%s'\n", path);
51
63edd4de94dd Add xaccess()
Rob Landley <rob@landley.net>
parents: 50
diff changeset
172 }
63edd4de94dd Add xaccess()
Rob Landley <rob@landley.net>
parents: 50
diff changeset
173
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
174 // Die unless we can open/create a file, returning file descriptor.
49
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
175 int xcreate(char *path, int flags, int mode)
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
176 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
177 int fd = open(path, flags, mode);
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
178 if (fd == -1) perror_exit("No file %s\n", path);
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
179 return fd;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
180 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
181
49
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
182 // Die unless we can open a file, returning file descriptor.
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
183 int xopen(char *path, int flags)
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
184 {
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
185 return xcreate(path, flags, 0);
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
186 }
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you
Rob Landley <rob@landley.net>
parents: 44
diff changeset
187
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
188 // Die unless we can open/create a file, returning FILE *.
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
189 FILE *xfopen(char *path, char *mode)
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
190 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
191 FILE *f = fopen(path, mode);
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
192 if (!f) perror_exit("No file %s\n", path);
2
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
193 return f;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df.
landley@driftwood
parents:
diff changeset
194 }
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
195
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
196 // Keep reading until full or EOF
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
197 ssize_t readall(int fd, void *buf, size_t len)
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
198 {
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
199 size_t count = 0;
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
200 while (count<len) {
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
201 int i = read(fd, buf+count, len-count);
8
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
202 if (!i) return len;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
203 if (i<0) return i;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
204 count += i;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
205 }
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
206
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
207 return count;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
208 }
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
209
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
210 // Keep writing until done or EOF
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
211 ssize_t writeall(int fd, void *buf, size_t len)
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
212 {
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
213 size_t count = 0;
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
214 while (count<len) {
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
215 int i = write(fd, buf+count, len-count);
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
216 if (i<1) return i;
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
217 count += i;
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
218 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
219
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
220 return count;
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
221 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
222
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
223 // Die if there's an error other than EOF.
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
224 size_t xread(int fd, void *buf, size_t len)
8
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work...
landley@driftwood
parents: 7
diff changeset
225 {
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
226 len = read(fd, buf, len);
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
227 if (len < 0) perror_exit("xread");
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
228
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
229 return len;
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
230 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
231
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
232 void xreadall(int fd, void *buf, size_t len)
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
233 {
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
234 if (len != readall(fd, buf, len)) perror_exit("xreadall");
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
235 }
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
236
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
237 // There's no xwriteall(), just xwrite(). When we read, there may or may not
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
238 // be more data waiting. When we write, there is data and it had better go
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
239 // somewhere.
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
240
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
241 void xwrite(int fd, void *buf, size_t len)
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
242 {
63
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which
Rob Landley <rob@landley.net>
parents: 53
diff changeset
243 if (len != writeall(fd, buf, len)) perror_exit("xwrite");
50
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
244 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions.
Rob Landley <rob@landley.net>
parents: 49
diff changeset
245
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
246 char *xgetcwd(void)
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
247 {
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
248 char *buf = getcwd(NULL, 0);
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
249 if (!buf) perror_exit("xgetcwd");
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
250
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
251 return buf;
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
252 }
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
253
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
254 // Cannonicalizes path by removing ".", "..", and "//" elements. This is not
44
e74aa8b8660a Comment tweak.
Rob Landley <rob@landley.net>
parents: 20
diff changeset
255 // the same as realpath(), where "dir/.." could wind up somewhere else by
e74aa8b8660a Comment tweak.
Rob Landley <rob@landley.net>
parents: 20
diff changeset
256 // following symlinks.
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
257 char *xabspath(char *path)
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
258 {
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
259 char *from, *to;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
260
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
261 // If this isn't an absolute path, make it one with cwd.
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
262 if (path[0]!='/') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
263 char *cwd=xgetcwd();
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
264 path = xmsprintf("%s/%s",cwd,path);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
265 free(cwd);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
266 } else path = xstrdup(path);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
267
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
268 // Loop through path elements
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
269 from = to = path;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
270 while (*from) {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
271
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
272 // Continue any current path component.
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
273 if (*from!='/') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
274 *(to++) = *(from++);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
275 continue;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
276 }
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
277
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
278 // Skip duplicate slashes.
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
279 while (*from=='/') from++;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
280
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
281 // Start of a new filename. Handle . and ..
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
282 while (*from=='.') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
283 // Skip .
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
284 if (from[1]=='/') from += 2;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
285 else if (!from[1]) from++;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
286 // Back up for ..
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
287 else if (from[1]=='.') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
288 if (from[2]=='/') from +=3;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
289 else if(!from[2]) from+=2;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
290 else break;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
291 while (to>path && *(--to)!='/');
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
292 } else break;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
293 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
294 // Add directory separator slash.
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
295 *(to++) = '/';
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
296 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
297 *to = 0;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
298
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
299 return path;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
300 }
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
301
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
302 // Find all file in a colon-separated path with access type "type" (generally
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
303 // X_OK or R_OK). Returns a list of absolute paths to each file found, in
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
304 // order.
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
305
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
306 struct string_list *find_in_path(char *path, char *filename)
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
307 {
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
308 struct string_list *rlist = NULL;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
309 char *cwd = xgetcwd();
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
310
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
311 for (;;) {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
312 char *next = path ? index(path, ':') : NULL;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
313 int len = next ? next-path : strlen(path);
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
314 struct string_list *rnext;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
315 struct stat st;
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
316
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
317 rnext = xmalloc(sizeof(void *) + strlen(filename)
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
318 + (len ? len : strlen(cwd)) + 2);
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
319 if (!len) sprintf(rnext->str, "%s/%s", cwd, filename);
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
320 else {
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
321 char *res = rnext->str;
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
322 strncpy(res, path, len);
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
323 res += len;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
324 *(res++) = '/';
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
325 strcpy(res, filename);
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
326 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
327
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
328 // Confirm it's not a directory.
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
329 if (!stat(rnext->str, &st) && S_ISREG(st.st_mode)) {
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
330 rnext->next = rlist;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
331 rlist = rnext;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
332 } else free(rnext);
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
333
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
334 if (!next) break;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
335 path += len;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
336 path++;
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
337 }
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
338 free(cwd);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
339
20
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main
Rob Landley <rob@landley.net>
parents: 16
diff changeset
340 return rlist;
16
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path().
Rob Landley <rob@landley.net>
parents: 8
diff changeset
341
4
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path().
landley@driftwood
parents: 3
diff changeset
342 }
7
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
343
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
344 // Convert unsigned int to ascii, writing into supplied buffer. A truncated
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
345 // result contains the first few digits of the result ala strncpy, and is
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
346 // always null terminated (unless buflen is 0).
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
347 void utoa_to_buf(unsigned n, char *buf, unsigned buflen)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
348 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
349 int i, out = 0;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
350
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
351 if (buflen) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
352 for (i=1000000000; i; i/=10) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
353 int res = n/i;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
354
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
355 if ((res || out || i == 1) && --buflen>0) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
356 out++;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
357 n -= res*i;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
358 *buf++ = '0' + res;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
359 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
360 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
361 *buf = 0;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
362 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
363 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
364
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
365 // Convert signed integer to ascii, using utoa_to_buf()
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
366 void itoa_to_buf(int n, char *buf, unsigned buflen)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
367 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
368 if (buflen && n<0) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
369 n = -n;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
370 *buf++ = '-';
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
371 buflen--;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
372 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
373 utoa_to_buf((unsigned)n, buf, buflen);
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
374 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
375
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
376 // This static buffer is used by both utoa() and itoa(), calling either one a
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
377 // second time will overwrite the previous results.
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
378 //
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
379 // The longest 32 bit integer is -2 billion plus a null terminator: 12 bytes.
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
380 // Note that int is always 32 bits on any remotely unix-like system, see
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
381 // http://www.unix.org/whitepapers/64bit.html for details.
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
382
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
383 static char itoa_buf[12];
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
384
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
385 // Convert unsigned integer to ascii, returning a static buffer.
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
386 char *utoa(unsigned n)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
387 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
388 utoa_to_buf(n, itoa_buf, sizeof(itoa_buf));
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
389
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
390 return itoa_buf;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
391 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
392
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
393 char *itoa(int n)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
394 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
395 itoa_to_buf(n, itoa_buf, sizeof(itoa_buf));
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
396
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
397 return itoa_buf;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices.
landley@driftwood
parents: 4
diff changeset
398 }
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
399
75
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
400 off_t fdlength(int fd)
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
401 {
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
402 int size;
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
403
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
404 if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512L;
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
405 return -1;
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
406 }
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
407
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
408 /*
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
409 This might be of use or might not. Unknown yet...
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
410
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
411
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
412 // Return how long the file at fd is, if there's any way to determine it.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
413 off_t fdlength(int fd)
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
414 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
415 off_t bottom = 0, top = 0, pos;
75
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
416 int size;
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
417
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
418 // If the ioctl works for this, return it.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
419
75
89ca591a9236 More random progress on mke2fs. Nothing to see yet.
Rob Landley <rob@landley.net>
parents: 70
diff changeset
420 if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512L;
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
421
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
422 // If not, do a binary search for the last location we can read. (Some
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
423 // block devices don't do BLKGETSIZE right.) This should probably have
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
424 // a CONFIG option...
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
425
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
426 do {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
427 char temp;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
428
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
429 pos = bottom + (top - bottom) / 2;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
430
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
431 // If we can read from the current location, it's bigger.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
432
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
433 if (lseek(fd, pos, 0)>=0 && safe_read(fd, &temp, 1)==1) {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
434 if (bottom == top) bottom = top = (top+1) * 2;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
435 else bottom = pos;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
436
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
437 // If we can't, it's smaller.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
438
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
439 } else {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
440 if (bottom == top) {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
441 if (!top) return 0;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
442 bottom = top/2;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
443 } else top = pos;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
444 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
445 } while (bottom + 1 != top);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
446
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
447 return pos + 1;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
448 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
449
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
450 // Read contents of file as a single freshly allocated nul-terminated string.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
451 char *readfile(char *name)
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
452 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
453 off_t len;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
454 int fd;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
455 char *buf;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
456
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
457 fd = open(pidfile, O_RDONLY);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
458 if (fd == -1) return 0;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
459 len = fdlength(fd);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
460 buf = xmalloc(len+1);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
461 buf[xread(fd, buf, len)] = 0;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
462
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
463 return buf;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
464 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
465
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
466 char *xreadfile(char *name)
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
467 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
468 char *buf = readfile(name);
70
a1b464bbef08 Add "echo". Has -n and -e (but not \0123 yet).
Rob Landley <rob@landley.net>
parents: 63
diff changeset
469 if (!buf) perror_exit("xreadfile %s", name);
53
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
470 return buf;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
471 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
472
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
473 */
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
474
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
475 // Open a /var/run/NAME.pid file, dying if we can't write it or if it currently
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
476 // exists and is this executable.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
477 void xpidfile(char *name)
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
478 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
479 char pidfile[256], spid[32];
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
480 int i, fd;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
481 pid_t pid;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
482
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
483 sprintf(pidfile, "/var/run/%s.pid", name);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
484 // Try three times to open the sucker.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
485 for (i=0; i<3; i++) {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
486 fd = open(pidfile, O_CREAT|O_EXCL, 0644);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
487 if (fd != -1) break;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
488
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
489 // If it already existed, read it. Loop for race condition.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
490 fd = open(pidfile, O_RDONLY);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
491 if (fd == -1) continue;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
492
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
493 // Is the old program still there?
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
494 spid[xread(fd, spid, sizeof(spid)-1)] = 0;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
495 close(fd);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
496 pid = atoi(spid);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
497 if (fd < 1 || kill(pid, 0) == ESRCH) unlink(pidfile);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
498
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
499 // An else with more sanity checking might be nice here.
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
500 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
501
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
502 if (i == 3) error_exit("xpidfile %s", name);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
503
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
504 xwrite(fd, spid, sprintf(spid, "%ld\n", (long)getpid()));
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
505 close(fd);
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on.
Rob Landley <rob@landley.net>
parents: 52
diff changeset
506 }