73 lines
1.1 KiB
C
73 lines
1.1 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.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 <sys/stat.h>
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#include "util.h"
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static void touch(const char *);
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static bool cflag = false;
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static time_t t;
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static void
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usage(void)
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{
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eprintf("usage: %s [-c] [-t stamp] 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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t = time(NULL);
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ARGBEGIN {
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case 'c':
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cflag = true;
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break;
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case 't':
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t = estrtol(EARGF(usage()), 0);
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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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static void
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touch(const char *str)
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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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if (stat(str, &st) == 0) {
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ut.actime = st.st_atime;
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ut.modtime = t;
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if (utime(str, &ut) == -1)
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eprintf("utime %s:", str);
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return;
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}
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else if (errno != ENOENT)
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eprintf("stat %s:", str);
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else if (cflag)
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return;
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if ((fd = open(str, O_CREAT|O_EXCL,
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S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) == -1)
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eprintf("open %s:", str);
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close(fd);
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touch(str);
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}
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