diff options
Diffstat (limited to 'bin/date/date.c')
| -rw-r--r-- | bin/date/date.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/bin/date/date.c b/bin/date/date.c new file mode 100644 index 000000000000..3563bac74ad7 --- /dev/null +++ b/bin/date/date.c @@ -0,0 +1,237 @@ +/* + * 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); +} |