/* $OpenBSD: date.c,v 1.8 1997/08/21 05:46:55 deraadt Exp $ */ /* $NetBSD: date.c,v 1.11 1995/09/07 06:21:05 jtc Exp $ */ /* * 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 #if 0 static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95"; #else static char rcsid[] = "$OpenBSD: date.c,v 1.8 1997/08/21 05:46:55 deraadt Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #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 main(argc, argv) int argc; char **argv; { extern int optind; extern char *optarg; struct timezone tz; int ch, rflag; char *format, buf[1024]; setlocale(LC_ALL, ""); tz.tz_dsttime = tz.tz_minuteswest = 0; rflag = 0; while ((ch = getopt(argc, argv, "d:nr:ut:")) != -1) 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, the 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"; /* 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\n", 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; int bigyear = 0; 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 12: /* yyyy */ bigyear = ATOI2(p); bigyear = bigyear * 100 - 1900; /* FALLTHROUGH */ case 10: /* yy */ lt->tm_year = bigyear; lt->tm_year += ATOI2(p); if (lt->tm_year < 69) /* hack for 2000 ;-} */ lt->tm_year += 100; if (lt->tm_year > (2037-1900)) { warnx("year too large (overflows 32 bit value)"); exit(1); } /* 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]yy[mm[dd[hh]]]]mm[.ss]]\n"); exit(1); }