toybox: lib/functions.c annotate

annotate lib/functions.c @ 63:69efffcacd70

Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which shouldn't be a problem if we register signal handlers with sigaction(SA_RESTART) Straighten out count and len (I generally consistently use "count" for the current progress and "len" for the total, but this time I got them backwards for some reason and don't want to confuse myself in future.)

author	Rob Landley <rob@landley.net>
date	Thu, 18 Jan 2007 21:54:08 -0500
parents	41d55b5d49fd
children	a1b464bbef08

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
3 266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	141 // 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	142 // 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	143 void xexec(char **argv)
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	144 {
3 266a462ed18c Next drop of toysh, plus more infratructure. landley@driftwood parents: 2 diff changeset	145 toy_exec(argv);
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	146 execvp(argv[0], argv);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	147 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	148 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	149
51 63edd4de94dd Add xaccess() Rob Landley <rob@landley.net> parents: 50 diff changeset	150 void xaccess(char *path, int flags)
63edd4de94dd Add xaccess() Rob Landley <rob@landley.net> parents: 50 diff changeset	151 {
63edd4de94dd Add xaccess() Rob Landley <rob@landley.net> parents: 50 diff changeset	152 if (access(path, flags)) error_exit("Can't access '%s'\n", path);
63edd4de94dd Add xaccess() Rob Landley <rob@landley.net> parents: 50 diff changeset	153 }
63edd4de94dd Add xaccess() Rob Landley <rob@landley.net> parents: 50 diff changeset	154
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	155 // 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	156 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	157 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	158 int fd = open(path, flags, mode);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	159 if (fd == -1) error_exit("No file %s\n", path);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	160 return fd;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	161 }
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	162
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	163 // 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	164 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	165 {
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you Rob Landley <rob@landley.net> parents: 44 diff changeset	166 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	167 }
bb4c38853a7d xopen() wants 2 arguments unless you're creating a file, in which case you Rob Landley <rob@landley.net> parents: 44 diff changeset	168
2 67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	169 // 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	170 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	171 {
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	172 FILE *f = fopen(path, mode);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	173 if (!f) error_exit("No file %s\n", path);
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	174 return f;
67b517913e56 Infrastructure, first drop of toy shell, and a bit of work on df. landley@driftwood parents: diff changeset	175 }
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	176
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	177 // 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	178 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	179 {
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	180 size_t count = 0;
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	181 while (count<len) {
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	182 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	183 if (!i) return len;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	184 if (i<0) return i;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	185 count += i;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	186 }
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	187
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	188 return count;
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	189 }
04f66da2bdbf Add reread(), readall(), and xread() on the bus ride in to work... landley@driftwood parents: 7 diff changeset	190
50 63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	191 // 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	192 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	193 {
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	194 size_t count = 0;
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	195 while (count<len) {
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	196 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	197 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	198 count += i;
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	199 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	200
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	201 return count;
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	202 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	203
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	204 // 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	205 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	206 {
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	207 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	208 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	209
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	210 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	211 }
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 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 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	214 {
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	215 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	216 }
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	217
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	218 // 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	219 // 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	220 // somewhere.
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	221
69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	222 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	223 {
63 69efffcacd70 Add fdprintf(). Remove reread() and rewrite() which handle -EINTR, which Rob Landley <rob@landley.net> parents: 53 diff changeset	224 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	225 }
63c168b65fa6 Add rewrite(), writeall(),and xwrite() to match the read versions. Rob Landley <rob@landley.net> parents: 49 diff changeset	226
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	227 char *xgetcwd(void)
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	228 {
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	229 char *buf = getcwd(NULL, 0);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	230 if (!buf) error_exit("xgetcwd");
7 fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	231
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	232 return buf;
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	233 }
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	234
16 dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	235 // Cannonicalizes path by removing ".", "..", and "//" elements. This is not
44 e74aa8b8660a Comment tweak. Rob Landley <rob@landley.net> parents: 20 diff changeset	236 // the same as realpath(), where "dir/.." could wind up somewhere else by
e74aa8b8660a Comment tweak. Rob Landley <rob@landley.net> parents: 20 diff changeset	237 // 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	238 char xabspath(char path)
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	239 {
16 dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	240 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	241
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	242 // 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	243 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	244 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	245 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	246 free(cwd);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	247 } 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	248
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	249 // 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	250 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	251 while (*from) {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	252
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	253 // 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	254 if (*from!='/') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	255 (to++) = (from++);
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	256 continue;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	257 }
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 // 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	260 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	261
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	262 // 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	263 while (*from=='.') {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	264 // Skip .
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	265 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	266 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	267 // 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	268 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	269 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	270 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	271 else break;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	272 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	273 } else break;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	274 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	275 // 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	276 *(to++) = '/';
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	277 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	278 *to = 0;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	279
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	280 return path;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	281 }
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	282
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	283 // 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	284 // 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	285 // order.
16 dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	286
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	287 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	288 {
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	289 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	290 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	291
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	292 for (;;) {
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	293 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	294 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	295 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	296 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	297
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	298 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	299 + (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	300 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	301 else {
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	302 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	303 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	304 res += len;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	305 *(res++) = '/';
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	306 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	307 }
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	308
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	309 // 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	310 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	311 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	312 rlist = rnext;
3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	313 } 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	314
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	315 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	316 path += len;
dd10785b6532 Add xabspath(), is_file_type(), which_in_path(), and find_in_path(). Rob Landley <rob@landley.net> parents: 8 diff changeset	317 path++;
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	318 }
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	319 free(cwd);
732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	320
20 3981c96f9285 Implement which. Add hello world to menuconfig. Wrap the various applet main Rob Landley <rob@landley.net> parents: 16 diff changeset	321 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	322
4 732b055e17f7 Add xmsprintf(), xgetcwd(), xgetcwd(), find_in_path(). landley@driftwood parents: 3 diff changeset	323 }
7 fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	324
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	325 // 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	326 // 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	327 // 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	328 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	329 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	330 int i, out = 0;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	331
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	332 if (buflen) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	333 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	334 int res = n/i;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	335
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	336 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	337 out++;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	338 n -= res*i;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	339 *buf++ = '0' + res;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	340 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	341 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	342 *buf = 0;
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 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	345
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	346 // 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	347 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	348 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	349 if (buflen && n<0) {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	350 n = -n;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	351 *buf++ = '-';
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	352 buflen--;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	353 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	354 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	355 }
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	356
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	357 // 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	358 // 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	359 //
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	360 // 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	361 // 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	362 // 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	363
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	364 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	365
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	366 // 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	367 char *utoa(unsigned n)
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	368 {
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	369 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	370
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	371 return itoa_buf;
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
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	374 char *itoa(int n)
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 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	377
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	378 return itoa_buf;
fc9c0503d5e2 Implement df. Add -Wall to build and fix up warnings. Add copyright notices. landley@driftwood parents: 4 diff changeset	379 }
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	380
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	381 /*
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	382 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	383
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	384
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	385 // 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	386 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	387 {
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	388 off_t bottom = 0, top = 0, 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	389 long size;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	390
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	391 // 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	392
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	393 if (ioctl(fd, BLKGETSIZE, &size) >= 0) return size*512;
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	394
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	395 // 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	396 // 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	397 // 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	398
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 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	400 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	401
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	402 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	403
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	404 // 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	405
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	406 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	407 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	408 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	409
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 // 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	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 } 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	413 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	414 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	415 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	416 } 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	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 } 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	419
41d55b5d49fd Add start of mke2fs/gene2fs, and some other stuff I've been working on. Rob Landley <rob@landley.net> parents: 52 diff changeset	420 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	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
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 // 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	424 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	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 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	427 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	428 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	429
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 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	431 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	432 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	433 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	434 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	435
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 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	437 }
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 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	440 {
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 char *buf = readfile(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	442 if (!buf) error_exit("xreadfile %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	443 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	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
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
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 // 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	449 // 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	450 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	451 {
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 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	453 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	454 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	455
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 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	457 // 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	458 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	459 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	460 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	461
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 // 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	463 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	464 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	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 // 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	467 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	468 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	469 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	470 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	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 // 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	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 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	476
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 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	478 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	479 }

Mercurial > hg > toybox

annotate lib/functions.c @ 63:69efffcacd70