home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1985, 1987, 1988 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1985, 1987, 1988 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)date.c 5.5 (Berkeley) 3/18/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/time.h>
- #include <sys/file.h>
- #include <syslog.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
-
- time_t tval;
- int retval, nflag;
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern int optind;
- extern char *optarg;
- struct timezone tz;
- int ch, rflag;
- char *format, buf[1024];
-
- tz.tz_dsttime = tz.tz_minuteswest = 0;
- rflag = 0;
- while ((ch = getopt(argc, argv, "d:nr:ut:")) != EOF)
- switch((char)ch) {
- case 'd': /* daylight savings time */
- tz.tz_dsttime = atoi(optarg) ? 1 : 0;
- break;
- case 'n': /* don't set network */
- nflag = 1;
- break;
- case 'r': /* user specified seconds */
- rflag = 1;
- tval = atol(optarg);
- break;
- case 'u': /* do everything in GMT */
- (void)setenv("TZ", "GMT0", 1);
- break;
- case 't': /* minutes west of GMT */
- /* error check; don't allow "PST" */
- if (isdigit(*optarg)) {
- tz.tz_minuteswest = atoi(optarg);
- break;
- }
- /* FALLTHROUGH */
- default:
- usage();
- }
- argc -= optind;
- argv += optind;
-
- /*
- * If -d or -t, set the timezone or daylight savings time; this
- * doesn't belong here, there kernel should not know about either.
- */
- if ((tz.tz_minuteswest || tz.tz_dsttime) &&
- settimeofday((struct timeval *)NULL, &tz)) {
- perror("date: settimeofday");
- exit(1);
- }
-
- if (!rflag && time(&tval) == -1) {
- perror("date: time");
- exit(1);
- }
-
- format = "%a %b %e %H:%M:%S %Z %Y\n";
-
- /* allow the operands in any order */
- if (*argv && **argv == '+') {
- format = *argv + 1;
- ++argv;
- }
-
- if (*argv) {
- setthetime(*argv);
- ++argv;
- }
-
- if (*argv && **argv == '+')
- format = *argv + 1;
-
- (void)strftime(buf, sizeof(buf), format, localtime(&tval));
- (void)printf("%s", buf);
- exit(retval);
- }
-
- #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
- setthetime(p)
- register char *p;
- {
- register struct tm *lt;
- struct timeval tv;
- int dot;
- char *t;
-
- for (t = p, dot = 0; *t; ++t)
- if (!isdigit(*t) && (*t != '.' || dot++))
- badformat();
-
- lt = localtime(&tval);
-
- if (t = index(p, '.')) { /* .ss */
- *t++ = '\0';
- if (lt->tm_sec > 61)
- badformat();
- } else
- lt->tm_sec = 0;
-
- for (t = p; *t; ++t)
- if (!isdigit(*t))
- badformat();
-
- switch (strlen(p)) {
- case 10: /* yy */
- lt->tm_year = ATOI2(p);
- if (lt->tm_year < 69) /* hack for 2000 ;-} */
- lt->tm_year += 100;
- /* FALLTHROUGH */
- case 8: /* mm */
- lt->tm_mon = ATOI2(p);
- if (lt->tm_mon > 12)
- badformat();
- --lt->tm_mon; /* time struct is 0 - 11 */
- /* FALLTHROUGH */
- case 6: /* dd */
- lt->tm_mday = ATOI2(p);
- if (lt->tm_mday > 31)
- badformat();
- /* FALLTHROUGH */
- case 4: /* hh */
- lt->tm_hour = ATOI2(p);
- if (lt->tm_hour > 23)
- badformat();
- /* FALLTHROUGH */
- case 2: /* mm */
- lt->tm_min = ATOI2(p);
- if (lt->tm_min > 59)
- badformat();
- break;
- default:
- badformat();
- }
-
- /* convert broken-down time to GMT clock time */
- if ((tval = mktime(lt)) == -1)
- badformat();
-
- if (!(p = getlogin())) /* single-user or no tty */
- p = "root";
- syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
-
- /* set the time */
- if (nflag || netsettime(tval)) {
- logwtmp("|", "date", "");
- tv.tv_sec = tval;
- tv.tv_usec = 0;
- if (settimeofday(&tv, (struct timezone *)NULL)) {
- perror("date: settimeofday");
- exit(1);
- }
- logwtmp("{", "date", "");
- }
- }
-
- badformat()
- {
- (void)fprintf(stderr, "date: illegal time format.\n");
- usage();
- }
-
- usage()
- {
- (void)fprintf(stderr,
- "usage: date [-nu] [-d dst] [-r seconds] [-t west] [+format]\n");
- (void)fprintf(stderr, " [yy[mm[dd[hh]]]]mm[.ss]]\n");
- exit(1);
- }
-