90 lines
1.4 KiB
C
90 lines
1.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <utime.h>
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#include "util.h"
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static int aflag;
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static int cflag;
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static int mflag;
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static time_t t;
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static void
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touch(const char *file)
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{
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int fd;
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struct stat st;
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struct utimbuf ut;
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int r;
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if ((r = stat(file, &st)) < 0) {
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if (errno != ENOENT)
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eprintf("stat %s:", file);
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if (cflag)
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return;
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} else if (r == 0) {
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ut.actime = aflag ? t : st.st_atime;
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ut.modtime = mflag ? t : st.st_mtime;
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if (utime(file, &ut) < 0)
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eprintf("utime %s:", file);
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return;
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}
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if ((fd = open(file, O_CREAT | O_EXCL, 0644)) < 0)
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eprintf("open %s:", file);
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close(fd);
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touch(file);
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}
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static void
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usage(void)
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{
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eprintf("usage: %s [-acm] [-r ref_file | -t timestamp] file ...\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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struct stat st;
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char *ref;
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t = time(NULL);
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ARGBEGIN {
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case 'a':
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aflag = 1;
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break;
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case 'c':
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cflag = 1;
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break;
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case 'm':
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mflag = 1;
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break;
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case 'r':
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ref = EARGF(usage());
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if (stat(ref, &st) < 0)
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eprintf("stat '%s':", ref);
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t = st.st_mtime;
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break;
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case 't':
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t = estrtonum(EARGF(usage()), 0, LLONG_MAX);
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break;
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default:
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usage();
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} ARGEND;
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if (argc < 1)
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usage();
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for (; argc > 0; argc--, argv++)
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touch(argv[0]);
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return 0;
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}
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