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touch: Add support for -a and -m

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Update the manpage.
This commit is contained in:
sin
2015-01-20 11:15:18 +00:00
parent 8b623f8593
commit 45c54bff0b
2 changed files with 58 additions and 41 deletions
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43
touch.c
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@@ -11,13 +11,15 @@
static void touch(const char *);
static int cflag = 0;
static int aflag;
static int cflag;
static int mflag;
static time_t t;
static void
usage(void)
{
eprintf("usage: %s [-c] [-t stamp] file...\n", argv0);
eprintf("usage: %s [-acm] [-t stamp] file ...\n", argv0);
}
int
@@ -26,9 +28,15 @@ main(int argc, char *argv[])
t = time(NULL);
ARGBEGIN {
case 'a':
aflag = 1;
break;
case 'c':
cflag = 1;
break;
case 'm':
mflag = 1;
break;
case 't':
t = estrtol(EARGF(usage()), 0);
break;
@@ -46,26 +54,29 @@ main(int argc, char *argv[])
}
static void
touch(const char *str)
touch(const char *file)
{
int fd;
struct stat st;
struct utimbuf ut;
int r;
if (stat(str, &st) == 0) {
ut.actime = st.st_atime;
ut.modtime = t;
if (utime(str, &ut) < 0)
eprintf("utime %s:", str);
if ((r = stat(file, &st)) < 0) {
if (errno != ENOENT)
eprintf("stat %s:", file);
if (cflag)
return;
} else if (r == 0) {
ut.actime = aflag ? t : st.st_atime;
ut.modtime = mflag ? t : st.st_mtime;
if (utime(file, &ut) < 0)
eprintf("utime %s:", file);
return;
}
else if (errno != ENOENT)
eprintf("stat %s:", str);
else if (cflag)
return;
if ((fd = open(str, O_CREAT|O_EXCL,
S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
eprintf("open %s:", str);
if ((fd = open(file, O_CREAT | O_EXCL, 0644)) < 0)
eprintf("open %s:", file);
close(fd);
touch(str);
touch(file);
}