/* * 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. * * @(#) Copyright (c) 1985, 1987, 1988, 1993 The Regents of the University of California. All rights reserved. * @(#)date.c 8.2 (Berkeley) 4/28/95 * $FreeBSD: src/bin/date/date.c,v 1.32.2.6 2001/10/31 17:31:51 dillon Exp $ * $DragonFly: src/bin/date/date.c,v 1.8 2004/11/07 20:54:51 eirikn Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include "extern.h" #include "vary.h" #ifndef TM_YEAR_BASE #define TM_YEAR_BASE 1900 #endif time_t tval; int retval; static void setthetime (const char *, const char *, int, int); static void badformat (void); static void usage (void); int main(int argc, char **argv) { struct timezone tz; int ch, rflag; int jflag, nflag; const char *format; char buf[1024]; char *endptr, *fmt; char *tmp; int set_timezone; struct vary *v; const struct vary *badv; struct tm lt; v = NULL; fmt = NULL; setlocale(LC_TIME, ""); tz.tz_dsttime = tz.tz_minuteswest = 0; rflag = 0; jflag = nflag = 0; set_timezone = 0; while ((ch = getopt(argc, argv, "d:f:jnr: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': /* user specified seconds */ rflag = 1; tval = strtoll(optarg, &tmp, 0); if (*tmp != 0) 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 */ 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((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, jflag, nflag); ++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); strftime(buf, sizeof(buf), format, <); printf("%s\n", buf); exit(retval); } #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) static void setthetime(const char *fmt, const char *p, int jflag, int nflag) { struct tm *lt; struct timeval tv; const char *dot, *t; int century; 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); 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(); } 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; century = 0; /* if p has a ".ss" field then let's pretend it's not there */ switch (strlen(p) - ((dot != NULL) ? 3 : 0)) { case 12: /* cc */ lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE; century = 1; /* FALLTHROUGH */ case 10: /* yy */ if (century) lt->tm_year += ATOI2(p); else { /* hack for 2000 ;-} */ lt->tm_year = ATOI2(p); if (lt->tm_year < 69) 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(); } } /* Let mktime() decide whether summer time is in effect. */ lt->tm_isdst = -1; /* 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)) { 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(void) { warnx("illegal time format"); usage(); } static void usage(void) { fprintf(stderr, "%s\n%s\n", "usage: date [-jnu] [-d dst] [-r seconds] [-t west] " "[-v[+|-]val[ymwdHMS]] ... ", " " "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]"); exit(1); }