/* * 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. * * $Id: date.c,v 1.21 1997/10/03 12:49:28 danny Exp $ */ #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 */ #ifndef lint static char const sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include "extern.h" #include "vary.h" time_t tval; int retval, nflag; static void setthetime __P((const char *, const 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]; char *endptr, *fmt; int set_timezone; struct vary *v; const struct vary *badv; struct tm lt; v = NULL; fmt = NULL; (void) setlocale(LC_TIME, ""); tz.tz_dsttime = tz.tz_minuteswest = 0; rflag = 0; set_timezone = 0; while ((ch = getopt(argc, argv, "d:f:nr: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 'n': /* don't set network */ nflag = 1; break; case 'r': /* user specified seconds */ rflag = 1; tval = atol(optarg); break; case 't': /* minutes west of GMT */ /* 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 GMT */ (void)setenv("TZ", "GMT0", 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((struct timeval *)NULL, &tz)) err(1, "settimeofday (timezone)"); if (!rflag && time(&tval) == -1) err(1, "time"); format = "%+"; /* allow the operands in any order */ if (*argv && **argv == '+') { format = *argv + 1; ++argv; } if (*argv) { setthetime(fmt, *argv); ++argv; } else if (fmt != NULL) usage(); if (*argv && **argv == '+') format = *argv + 1; lt = *localtime(&tval); badv = vary_apply(v, <); if (badv) { fprintf(stderr, "%s: Cannot apply date adjustment\n", badv->arg); vary_destroy(v); usage(); } vary_destroy(v); (void)strftime(buf, sizeof(buf), format, <); (void)printf("%s\n", buf); exit(retval); } #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; void setthetime(fmt, p) const char *fmt; register const char *p; { register struct tm *lt; struct timeval tv; const char *dot, *t; if (fmt != NULL) { lt = localtime(&tval); t = strptime(p, fmt, lt); if (t == NULL) { fprintf(stderr, "Failed conversion of ``%s''" " using format ``%s''\n", p, fmt); lt = localtime(&tval); return; } else if (*t != '\0') fprintf(stderr, "Warning: Ignoring %d extraneous" " characters in date string (%s)\n", strlen(t), t); } else { 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++; /* *dot++ = '\0'; */ if (strlen(dot) != 2) badformat(); lt->tm_sec = ATOI2(dot); if (lt->tm_sec > 61) badformat(); } else lt->tm_sec = 0; /* if p has a ".ss" field then let's pretend it's not there */ switch (strlen(p) - ((dot != NULL) ? 3 : 0)) { 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) errx(1, "nonexistent time"); /* set the time */ if (nflag || netsettime(tval)) { logwtmp("|", "date", ""); tv.tv_sec = tval; tv.tv_usec = 0; if (settimeofday(&tv, (struct timezone *)NULL)) err(1, "settimeofday (timeval)"); 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, "%s\n%s\n", "usage: date [-nu] [-d dst] [-r seconds] [-t west] " "[-v[+|-]val[ymwdHM]] ... ", " [-f fmt date | [[[[yy]mm]dd]HH]MM[.ss]] [+format]"); exit(1); }