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-rw-r--r--shell_cmds/date/date.c365
1 files changed, 365 insertions, 0 deletions
diff --git a/shell_cmds/date/date.c b/shell_cmds/date/date.c
new file mode 100644
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--- /dev/null
+++ b/shell_cmds/date/date.c
@@ -0,0 +1,365 @@
+/*-
+ * 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.
+ * 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 const copyright[] =
+"@(#) Copyright (c) 1985, 1987, 1988, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95";
+#endif /* not lint */
+#endif
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+#include <utmpx.h>
+
+#ifdef __APPLE__
+#include <get_compat.h>
+#else
+#define COMPAT_MODE(a,b) (1)
+#endif /* __APPLE__ */
+
+#include "extern.h"
+#include "vary.h"
+
+#ifndef TM_YEAR_BASE
+#define TM_YEAR_BASE 1900
+#endif
+
+#ifdef __APPLE__
+#define st_mtim st_mtimespec
+#endif
+
+static time_t tval;
+int retval;
+static int unix2003_std; /* to determine legacy vs std mode */
+
+static void setthetime(const char *, const char *, int, int);
+static void badformat(void);
+static void usage(void);
+
+static const char *rfc2822_format = "%a, %d %b %Y %T %z";
+
+int
+main(int argc, char *argv[])
+{
+ struct timezone tz;
+ int ch, rflag;
+ int jflag, nflag, Rflag;
+ const char *format;
+ char buf[1024];
+ char *endptr, *fmt;
+ char *tmp;
+ int set_timezone;
+ struct vary *v;
+ const struct vary *badv;
+ struct tm lt;
+ struct stat sb;
+
+ unix2003_std = COMPAT_MODE("bin/date", "unix2003"); /* Determine the STD */
+
+ v = NULL;
+ fmt = NULL;
+ (void) setlocale(LC_TIME, "");
+ tz.tz_dsttime = tz.tz_minuteswest = 0;
+ rflag = 0;
+ jflag = nflag = Rflag = 0;
+ set_timezone = 0;
+ while ((ch = getopt(argc, argv, "d:f:jnRr:t:uv:")) != -1)
+ switch((char)ch) {
+ case 'd': /* daylight savings time */
+ tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
+ if (endptr == optarg || *endptr != '\0')
+ usage();
+ set_timezone = 1;
+ break;
+ case 'f':
+ fmt = optarg;
+ break;
+ case 'j':
+ jflag = 1; /* don't set time */
+ break;
+ case 'n': /* don't set network */
+ nflag = 1;
+ break;
+ case 'R': /* RFC 2822 datetime format */
+ Rflag = 1;
+ break;
+ case 'r': /* user specified seconds */
+ rflag = 1;
+ tval = strtoq(optarg, &tmp, 0);
+ if (*tmp != 0) {
+ if (stat(optarg, &sb) == 0)
+ tval = sb.st_mtim.tv_sec;
+ else
+ usage();
+ }
+ break;
+ case 't': /* minutes west of UTC */
+ /* error check; don't allow "PST" */
+ tz.tz_minuteswest = strtol(optarg, &endptr, 10);
+ if (endptr == optarg || *endptr != '\0')
+ usage();
+ set_timezone = 1;
+ break;
+ case 'u': /* do everything in UTC */
+ (void)setenv("TZ", "UTC0", 1);
+ break;
+ case 'v':
+ v = vary_append(v, optarg);
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ /*
+ * If -d or -t, set the timezone or daylight savings time; this
+ * doesn't belong here; the kernel should not know about either.
+ */
+ if (set_timezone && settimeofday(NULL, &tz) != 0)
+ err(1, "settimeofday (timezone)");
+
+ if (!rflag && time(&tval) == -1)
+ err(1, "time");
+
+ format = "%+";
+
+ if (Rflag)
+ format = rfc2822_format;
+
+ /* allow the operands in any order */
+ if (*argv && **argv == '+') {
+ format = *argv + 1;
+ ++argv;
+ }
+
+ if (*argv) {
+ setthetime(fmt, *argv, jflag, nflag);
+ ++argv;
+ } else if (fmt != NULL)
+ usage();
+
+ if (*argv && **argv == '+')
+ format = *argv + 1;
+
+#ifdef __APPLE__
+ /* 7999711 */
+ struct tm *ltp = localtime(&tval);
+ if (ltp == NULL) {
+ err(1, "localtime");
+ }
+ lt = *ltp;
+#else
+ lt = *localtime(&tval);
+#endif
+ badv = vary_apply(v, &lt);
+ if (badv) {
+ fprintf(stderr, "%s: Cannot apply date adjustment\n",
+ badv->arg);
+ vary_destroy(v);
+ usage();
+ }
+ vary_destroy(v);
+
+ if (format == rfc2822_format)
+ /*
+ * When using RFC 2822 datetime format, don't honor the
+ * locale.
+ */
+ setlocale(LC_TIME, "C");
+
+ (void)strftime(buf, sizeof(buf), format, &lt);
+ (void)printf("%s\n", buf);
+ if (fflush(stdout))
+ err(1, "stdout");
+ /*
+ * If date/time could not be set/notified in the other hosts as
+ * determined by netsetval(), a return value 2 is set, which is
+ * only propagated back to shell in legacy mode.
+ */
+ if (unix2003_std)
+ exit(0);
+ exit(retval);
+}
+
+#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
+#define ATOI2_OFFSET(s, o) (((s)[o] - '0') * 10 + ((s)[o + 1] - '0'))
+
+static void
+setthetime(const char *fmt, const char *p, int jflag, int nflag)
+{
+ struct utmpx utx;
+ struct tm *lt;
+ struct timeval tv;
+ const char *dot, *t;
+ int century;
+ size_t length;
+
+ lt = localtime(&tval);
+ lt->tm_isdst = -1; /* divine correct DST */
+
+ if (fmt != NULL) {
+ t = strptime(p, fmt, lt);
+ if (t == NULL) {
+ fprintf(stderr, "Failed conversion of ``%s''"
+ " using format ``%s''\n", p, fmt);
+ badformat();
+ } else if (*t != '\0')
+ fprintf(stderr, "Warning: Ignoring %ld extraneous"
+ " characters in date string (%s)\n",
+ (long) strlen(t), t);
+ } else {
+ for (t = p, dot = NULL; *t; ++t) {
+ if (isdigit(*t))
+ continue;
+ if (*t == '.' && dot == NULL) {
+ dot = t;
+ continue;
+ }
+ badformat();
+ }
+
+ if (dot != NULL) { /* .ss */
+ dot++; /* *dot++ = '\0'; */
+ if (strlen(dot) != 2)
+ badformat();
+ lt->tm_sec = ATOI2(dot);
+ if (lt->tm_sec > 61)
+ badformat();
+ } else
+ lt->tm_sec = 0;
+
+ century = 0;
+ /* if p has a ".ss" field then let's pretend it's not there */
+ switch (length = strlen(p) - ((dot != NULL) ? 3 : 0)) {
+ case 12: /* cc */
+ lt->tm_year = (unix2003_std ? ATOI2_OFFSET(p, length - 4) : ATOI2(p)) * 100 - TM_YEAR_BASE;
+ century = 1;
+ /* FALLTHROUGH */
+ case 10: /* yy */
+ if (century)
+ lt->tm_year += (unix2003_std ? ATOI2_OFFSET(p, length - 2) : ATOI2(p));
+ else {
+ lt->tm_year = (unix2003_std ? ATOI2_OFFSET(p, length - 2) : ATOI2(p));
+ if (lt->tm_year < 69) /* hack for 2000 ;-} */
+ lt->tm_year += 2000 - TM_YEAR_BASE;
+ else
+ lt->tm_year += 1900 - TM_YEAR_BASE;
+ }
+ /* 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)
+ errx(1, "nonexistent time");
+
+ if (!jflag) {
+ /* set the time */
+ if (nflag || netsettime(tval)) {
+ utx.ut_type = OLD_TIME;
+ (void)gettimeofday(&utx.ut_tv, NULL);
+ pututxline(&utx);
+ tv.tv_sec = tval;
+ tv.tv_usec = 0;
+ if (settimeofday(&tv, NULL) != 0)
+ err(1, "settimeofday (timeval)");
+ utx.ut_type = NEW_TIME;
+ (void)gettimeofday(&utx.ut_tv, NULL);
+ pututxline(&utx);
+ }
+
+ if ((p = getlogin()) == NULL)
+ p = "???";
+ syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
+ }
+}
+
+static void
+badformat(void)
+{
+ warnx("illegal time format");
+ usage();
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr, "%s\n%s\n",
+ "usage: date [-jnRu] [-d dst] [-r seconds] [-t west] "
+ "[-v[+|-]val[ymwdHMS]] ... ",
+ unix2003_std ?
+ " "
+ "[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]" :
+ " "
+ "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");
+ exit(1);
+}
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