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authorrgrimes <rgrimes@FreeBSD.org>1994-05-26 06:18:55 +0000
committerrgrimes <rgrimes@FreeBSD.org>1994-05-26 06:18:55 +0000
commite3cfc8ce61f788739c66445d903f8beacb40c93d (patch)
treeba7beef9ee9289c4383bad976f88710e44c98b4d /bin/date/date.c
parent862fdf11a2ede45dec0da01ed575525d79468981 (diff)
downloadFreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.zip
FreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.tar.gz
BSD 4.4 Lite bin Sources
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+/*
+ * Copyright (c) 1985, 1987, 1988, 1993
+ * 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
+static char copyright[] =
+"@(#) Copyright (c) 1985, 1987, 1988, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)date.c 8.1 (Berkeley) 5/31/93";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/time.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#include "extern.h"
+
+time_t tval;
+int retval, nflag;
+
+static void setthetime __P((char *));
+static void badformat __P((void));
+static void usage __P((void));
+
+int logwtmp __P((char *, char *, char *));
+
+int
+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(NULL, &tz))
+ err(1, "settimeofday");
+
+ if (!rflag && time(&tval) == -1)
+ err(1, "time");
+
+ 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;
+void
+setthetime(p)
+ register char *p;
+{
+ register struct tm *lt;
+ struct timeval tv;
+ char *dot, *t;
+
+ for (t = p, dot = NULL; *t; ++t) {
+ if (isdigit(*t))
+ continue;
+ if (*t == '.' && dot == NULL) {
+ dot = t;
+ continue;
+ }
+ badformat();
+ }
+
+ lt = localtime(&tval);
+
+ if (dot != NULL) { /* .ss */
+ *dot++ = '\0';
+ if (strlen(dot) != 2)
+ badformat();
+ lt->tm_sec = ATOI2(dot);
+ if (lt->tm_sec > 61)
+ badformat();
+ } else
+ lt->tm_sec = 0;
+
+ 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();
+
+ /* set the time */
+ if (nflag || netsettime(tval)) {
+ logwtmp("|", "date", "");
+ tv.tv_sec = tval;
+ tv.tv_usec = 0;
+ if (settimeofday(&tv, NULL)) {
+ perror("date: settimeofday");
+ exit(1);
+ }
+ logwtmp("{", "date", "");
+ }
+
+ if ((p = getlogin()) == NULL)
+ p = "???";
+ syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
+}
+
+static void
+badformat()
+{
+ warnx("illegal time format");
+ usage();
+}
+
+static void
+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);
+}
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