annotate toys/posix/touch.c @ 711:dcc6136e6659

Update touch: add remaining posix arguments, make existing ones work.
author Rob Landley <rob@landley.net>
date Sun, 25 Nov 2012 19:23:10 -0600
parents 9fb5fe6eb13f
children 6cc69be43c42
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
1 /* vi: set sw=4 ts=4:
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
2 *
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
3 * touch.c : change timestamp of a file
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
4 * Copyright 2012 Choubey Ji <warior.linux@gmail.com>
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
5 *
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
6 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
7 * acmrtd
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
8
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
9 USE_TOUCH(NEWTOY(touch, "acd:mr:t:[!dtr]", TOYFLAG_BIN))
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
10
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
11 config TOUCH
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
12 bool "touch"
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
13 default y
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
14 help
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
15 Usage: Usage: touch [OPTION]... FILE...
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
16
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
17 Update the access and modification times of each FILE to the current time.
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
18
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
19 -a change access time
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
20 -m change modification time
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
21 -c don't create file
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
22 -d DATE use YYYY-MM-DDThh:mm:SS[.frac][tz] as time
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
23 -t TIME use [[CC]YY]MMDDhhmm[.ss][frac] as time
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
24 -r FILE use reference file's time
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
25 */
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
26
702
9fb5fe6eb13f More touch cleanup to use generic infrastructure: use getdate() from libc, use flag macros, option parsing can collect argument strings in global block, use existing perror_* macros.
Rob Landley <rob@landley.net>
parents: 701
diff changeset
27 #define FOR_touch
699
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
28 #include "toys.h"
26ea643e1de1 Add touch from Choubey Ji.
Rob Landley <rob@landley.net>
parents:
diff changeset
29
702
9fb5fe6eb13f More touch cleanup to use generic infrastructure: use getdate() from libc, use flag macros, option parsing can collect argument strings in global block, use existing perror_* macros.
Rob Landley <rob@landley.net>
parents: 701
diff changeset
30 GLOBALS(
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
31 char *time;
702
9fb5fe6eb13f More touch cleanup to use generic infrastructure: use getdate() from libc, use flag macros, option parsing can collect argument strings in global block, use existing perror_* macros.
Rob Landley <rob@landley.net>
parents: 701
diff changeset
32 char *file;
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
33 char *date;
702
9fb5fe6eb13f More touch cleanup to use generic infrastructure: use getdate() from libc, use flag macros, option parsing can collect argument strings in global block, use existing perror_* macros.
Rob Landley <rob@landley.net>
parents: 701
diff changeset
34 )
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
35
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
36 int fetch(char *file, struct timeval *tv, unsigned flags)
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
37 {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
38 struct stat st;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
39
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
40 if (stat(TT.file, &st)) return 1;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
41
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
42 if (flags & FLAG_a) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
43 tv[0].tv_sec = st.st_atime;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
44 tv[0].tv_usec = st.st_atim.tv_nsec/1000;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
45 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
46 if (flags & FLAG_m) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
47 tv[1].tv_sec = st.st_mtime;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
48 tv[1].tv_usec = st.st_mtim.tv_nsec/1000;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
49 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
50
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
51 return 0;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
52 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
53
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
54 void touch_main(void)
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
55 {
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
56 struct timeval tv[2];
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
57 struct tm tm;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
58 char **ss;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
59 int flag;
702
9fb5fe6eb13f More touch cleanup to use generic infrastructure: use getdate() from libc, use flag macros, option parsing can collect argument strings in global block, use existing perror_* macros.
Rob Landley <rob@landley.net>
parents: 701
diff changeset
60
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
61 gettimeofday(tv, NULL);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
62 localtime_r(&(tv->tv_sec), &tm);
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
63
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
64 if (toys.optflags & (FLAG_t|FLAG_d)) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
65 char *date, *s;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
66 int i, len;
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
67
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
68 if (toys.optflags & FLAG_d) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
69 date = TT.date;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
70 i = strlen(date)-1;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
71 if (*date && toupper(date[i])=='Z') {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
72 putenv("TZ=UTC");
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
73 strncpy(toybuf, date, sizeof(toybuf)-1);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
74 date = toybuf;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
75 date[i]=0;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
76 gmtime_r(&(tv->tv_sec), &tm);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
77 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
78 s = strptime(date, "%Y-%m-%dT%T", &tm);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
79 if (s && *s=='.') {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
80 sscanf(s, ".%d%n", &i, &len);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
81 s += len;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
82 tv->tv_usec = i;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
83 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
84 } else {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
85 strcpy(toybuf, "%Y%m%d%H%M");
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
86 date = TT.time;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
87 for (i=0;i<3;i++) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
88 s = strptime(date, toybuf+(i&2), &tm);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
89 if (s) break;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
90 toybuf[1]='y';
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
91 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
92 if (s && *s=='.') {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
93 int count = sscanf(s, ".%2d%u%n", &(tm.tm_sec), &i, &len);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
94 if (count==2) tv->tv_usec = i;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
95 s += len;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
96 }
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
97 }
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
98
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
99 errno = 0;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
100 tv->tv_sec = mktime(&tm);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
101 if (!s || *s || errno == EOVERFLOW) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
102 // Warn Indiana Jones the monkey died.
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
103 perror_exit("bad '%s'", date);
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
104 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
105 }
711
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
106 tv[1]=tv[0];
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
107
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
108 if (TT.file && fetch(TT.file, tv, FLAG_a|FLAG_m))
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
109 perror_exit("-r '%s'", TT.file);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
110
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
111 flag = (~toys.optflags) & (FLAG_m|FLAG_a);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
112 if (flag == (FLAG_m|FLAG_a)) flag = 0;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
113 for (ss=toys.optargs; *ss;) {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
114 int fd;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
115
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
116 if ((!flag || !fetch(*ss, tv, flag)) && !utimes(*ss, tv)) ss++;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
117 else if (toys.optflags & FLAG_c) ss++;
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
118 else if (-1 != (fd = open(*ss, O_CREAT, 0666))) close(fd);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
119 else {
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
120 perror_msg("'%s'", *ss++);
dcc6136e6659 Update touch: add remaining posix arguments, make existing ones work.
Rob Landley <rob@landley.net>
parents: 702
diff changeset
121 toys.exitval = 1;
700
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
122 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
123 }
ad6bff0c9169 Refactor touch (cleanup whitespace, brackets, function order), code otherwise same.
Rob Landley <rob@landley.net>
parents: 699
diff changeset
124 }