872b698bd4
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
338 lines
8.0 KiB
C
338 lines
8.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1985, 1987, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1985, 1987, 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <utmpx.h>
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#include "extern.h"
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#include "vary.h"
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#ifndef TM_YEAR_BASE
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#define TM_YEAR_BASE 1900
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#endif
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static time_t tval;
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int retval;
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static void setthetime(const char *, const char *, int, int);
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static void badformat(void);
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static void usage(void);
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static const char *rfc2822_format = "%a, %d %b %Y %T %z";
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int
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main(int argc, char *argv[])
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{
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struct timezone tz;
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int ch, rflag;
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int jflag, nflag, Rflag;
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const char *format;
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char buf[1024];
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char *endptr, *fmt;
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char *tmp;
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int set_timezone;
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struct vary *v;
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const struct vary *badv;
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struct tm *lt;
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struct stat sb;
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v = NULL;
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fmt = NULL;
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(void) setlocale(LC_TIME, "");
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tz.tz_dsttime = tz.tz_minuteswest = 0;
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rflag = 0;
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jflag = nflag = Rflag = 0;
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set_timezone = 0;
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while ((ch = getopt(argc, argv, "d:f:jnRr:t:uv:")) != -1)
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switch((char)ch) {
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case 'd': /* daylight savings time */
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tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
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if (endptr == optarg || *endptr != '\0')
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usage();
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set_timezone = 1;
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break;
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case 'f':
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fmt = optarg;
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break;
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case 'j':
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jflag = 1; /* don't set time */
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break;
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case 'n': /* don't set network */
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nflag = 1;
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break;
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case 'R': /* RFC 2822 datetime format */
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Rflag = 1;
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break;
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case 'r': /* user specified seconds */
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rflag = 1;
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tval = strtoq(optarg, &tmp, 0);
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if (*tmp != 0) {
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if (stat(optarg, &sb) == 0)
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tval = sb.st_mtim.tv_sec;
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else
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usage();
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}
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break;
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case 't': /* minutes west of UTC */
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/* error check; don't allow "PST" */
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tz.tz_minuteswest = strtol(optarg, &endptr, 10);
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if (endptr == optarg || *endptr != '\0')
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usage();
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set_timezone = 1;
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break;
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case 'u': /* do everything in UTC */
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(void)setenv("TZ", "UTC0", 1);
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break;
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case 'v':
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v = vary_append(v, optarg);
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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/*
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* If -d or -t, set the timezone or daylight savings time; this
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* doesn't belong here; the kernel should not know about either.
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*/
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if (set_timezone && settimeofday(NULL, &tz) != 0)
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err(1, "settimeofday (timezone)");
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if (!rflag && time(&tval) == -1)
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err(1, "time");
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format = "%+";
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if (Rflag)
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format = rfc2822_format;
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/* allow the operands in any order */
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if (*argv && **argv == '+') {
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format = *argv + 1;
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++argv;
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}
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if (*argv) {
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setthetime(fmt, *argv, jflag, nflag);
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++argv;
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} else if (fmt != NULL)
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usage();
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if (*argv && **argv == '+')
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format = *argv + 1;
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lt = localtime(&tval);
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if (lt == NULL)
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errx(1, "invalid time");
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badv = vary_apply(v, lt);
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if (badv) {
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fprintf(stderr, "%s: Cannot apply date adjustment\n",
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badv->arg);
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vary_destroy(v);
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usage();
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}
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vary_destroy(v);
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if (format == rfc2822_format)
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/*
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* When using RFC 2822 datetime format, don't honor the
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* locale.
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*/
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setlocale(LC_TIME, "C");
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(void)strftime(buf, sizeof(buf), format, lt);
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(void)printf("%s\n", buf);
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if (fflush(stdout))
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err(1, "stdout");
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exit(retval);
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}
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#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
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static void
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setthetime(const char *fmt, const char *p, int jflag, int nflag)
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{
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struct utmpx utx;
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struct tm *lt;
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struct timeval tv;
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const char *dot, *t;
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int century;
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lt = localtime(&tval);
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if (lt == NULL)
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errx(1, "invalid time");
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lt->tm_isdst = -1; /* divine correct DST */
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if (fmt != NULL) {
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t = strptime(p, fmt, lt);
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if (t == NULL) {
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fprintf(stderr, "Failed conversion of ``%s''"
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" using format ``%s''\n", p, fmt);
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badformat();
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} else if (*t != '\0')
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fprintf(stderr, "Warning: Ignoring %ld extraneous"
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" characters in date string (%s)\n",
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(long) strlen(t), t);
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} else {
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for (t = p, dot = NULL; *t; ++t) {
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if (isdigit(*t))
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continue;
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if (*t == '.' && dot == NULL) {
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dot = t;
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continue;
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}
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badformat();
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}
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if (dot != NULL) { /* .ss */
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dot++; /* *dot++ = '\0'; */
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if (strlen(dot) != 2)
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badformat();
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lt->tm_sec = ATOI2(dot);
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if (lt->tm_sec > 61)
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badformat();
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} else
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lt->tm_sec = 0;
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century = 0;
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/* if p has a ".ss" field then let's pretend it's not there */
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switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
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case 12: /* cc */
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lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
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century = 1;
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/* FALLTHROUGH */
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case 10: /* yy */
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if (century)
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lt->tm_year += ATOI2(p);
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else {
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lt->tm_year = ATOI2(p);
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if (lt->tm_year < 69) /* hack for 2000 ;-} */
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lt->tm_year += 2000 - TM_YEAR_BASE;
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else
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lt->tm_year += 1900 - TM_YEAR_BASE;
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}
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/* FALLTHROUGH */
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case 8: /* mm */
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lt->tm_mon = ATOI2(p);
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if (lt->tm_mon > 12)
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badformat();
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--lt->tm_mon; /* time struct is 0 - 11 */
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/* FALLTHROUGH */
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case 6: /* dd */
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lt->tm_mday = ATOI2(p);
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if (lt->tm_mday > 31)
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badformat();
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/* FALLTHROUGH */
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case 4: /* HH */
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lt->tm_hour = ATOI2(p);
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if (lt->tm_hour > 23)
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badformat();
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/* FALLTHROUGH */
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case 2: /* MM */
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lt->tm_min = ATOI2(p);
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if (lt->tm_min > 59)
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badformat();
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break;
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default:
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badformat();
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}
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}
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/* convert broken-down time to GMT clock time */
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if ((tval = mktime(lt)) == -1)
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errx(1, "nonexistent time");
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if (!jflag) {
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/* set the time */
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if (nflag || netsettime(tval)) {
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utx.ut_type = OLD_TIME;
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(void)gettimeofday(&utx.ut_tv, NULL);
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pututxline(&utx);
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tv.tv_sec = tval;
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tv.tv_usec = 0;
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if (settimeofday(&tv, NULL) != 0)
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err(1, "settimeofday (timeval)");
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utx.ut_type = NEW_TIME;
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(void)gettimeofday(&utx.ut_tv, NULL);
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pututxline(&utx);
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}
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if ((p = getlogin()) == NULL)
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p = "???";
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syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
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}
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}
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static void
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badformat(void)
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{
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warnx("illegal time format");
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usage();
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "%s\n%s\n",
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"usage: date [-jnRu] [-d dst] [-r seconds] [-t west] "
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"[-v[+|-]val[ymwdHMS]] ... ",
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" "
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"[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");
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exit(1);
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}
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