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author | 2021-05-09 14:20:58 -0400 | |
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committer | 2021-05-09 14:20:58 -0400 | |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /shell_cmds/date/date.c | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'shell_cmds/date/date.c')
-rw-r--r-- | shell_cmds/date/date.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/shell_cmds/date/date.c b/shell_cmds/date/date.c new file mode 100644 index 0000000..a45e110 --- /dev/null +++ b/shell_cmds/date/date.c @@ -0,0 +1,365 @@ +/*- + * 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. + * 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 const copyright[] = +"@(#) Copyright (c) 1985, 1987, 1988, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95"; +#endif /* not lint */ +#endif + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/stat.h> + +#include <ctype.h> +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> +#include <utmpx.h> + +#ifdef __APPLE__ +#include <get_compat.h> +#else +#define COMPAT_MODE(a,b) (1) +#endif /* __APPLE__ */ + +#include "extern.h" +#include "vary.h" + +#ifndef TM_YEAR_BASE +#define TM_YEAR_BASE 1900 +#endif + +#ifdef __APPLE__ +#define st_mtim st_mtimespec +#endif + +static time_t tval; +int retval; +static int unix2003_std; /* to determine legacy vs std mode */ + +static void setthetime(const char *, const char *, int, int); +static void badformat(void); +static void usage(void); + +static const char *rfc2822_format = "%a, %d %b %Y %T %z"; + +int +main(int argc, char *argv[]) +{ + struct timezone tz; + int ch, rflag; + int jflag, nflag, Rflag; + const char *format; + char buf[1024]; + char *endptr, *fmt; + char *tmp; + int set_timezone; + struct vary *v; + const struct vary *badv; + struct tm lt; + struct stat sb; + + unix2003_std = COMPAT_MODE("bin/date", "unix2003"); /* Determine the STD */ + + v = NULL; + fmt = NULL; + (void) setlocale(LC_TIME, ""); + tz.tz_dsttime = tz.tz_minuteswest = 0; + rflag = 0; + jflag = nflag = Rflag = 0; + set_timezone = 0; + while ((ch = getopt(argc, argv, "d:f:jnRr: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': /* RFC 2822 datetime format */ + Rflag = 1; + break; + case 'r': /* user specified seconds */ + rflag = 1; + tval = strtoq(optarg, &tmp, 0); + if (*tmp != 0) { + if (stat(optarg, &sb) == 0) + tval = sb.st_mtim.tv_sec; + else + 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 */ + (void)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(NULL, &tz) != 0) + err(1, "settimeofday (timezone)"); + + if (!rflag && time(&tval) == -1) + err(1, "time"); + + format = "%+"; + + if (Rflag) + format = rfc2822_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; + +#ifdef __APPLE__ + /* 7999711 */ + struct tm *ltp = localtime(&tval); + if (ltp == NULL) { + err(1, "localtime"); + } + lt = *ltp; +#else + lt = *localtime(&tval); +#endif + badv = vary_apply(v, <); + if (badv) { + fprintf(stderr, "%s: Cannot apply date adjustment\n", + badv->arg); + vary_destroy(v); + usage(); + } + vary_destroy(v); + + if (format == rfc2822_format) + /* + * When using RFC 2822 datetime format, don't honor the + * locale. + */ + setlocale(LC_TIME, "C"); + + (void)strftime(buf, sizeof(buf), format, <); + (void)printf("%s\n", buf); + if (fflush(stdout)) + err(1, "stdout"); + /* + * If date/time could not be set/notified in the other hosts as + * determined by netsetval(), a return value 2 is set, which is + * only propagated back to shell in legacy mode. + */ + if (unix2003_std) + exit(0); + exit(retval); +} + +#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) +#define ATOI2_OFFSET(s, o) (((s)[o] - '0') * 10 + ((s)[o + 1] - '0')) + +static void +setthetime(const char *fmt, const char *p, int jflag, int nflag) +{ + struct utmpx utx; + struct tm *lt; + struct timeval tv; + const char *dot, *t; + int century; + size_t length; + + lt = localtime(&tval); + lt->tm_isdst = -1; /* divine correct DST */ + + if (fmt != NULL) { + 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(); + } + + 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 (length = strlen(p) - ((dot != NULL) ? 3 : 0)) { + case 12: /* cc */ + lt->tm_year = (unix2003_std ? ATOI2_OFFSET(p, length - 4) : ATOI2(p)) * 100 - TM_YEAR_BASE; + century = 1; + /* FALLTHROUGH */ + case 10: /* yy */ + if (century) + lt->tm_year += (unix2003_std ? ATOI2_OFFSET(p, length - 2) : ATOI2(p)); + else { + lt->tm_year = (unix2003_std ? ATOI2_OFFSET(p, length - 2) : ATOI2(p)); + if (lt->tm_year < 69) /* hack for 2000 ;-} */ + 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(); + } + } + + /* 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)) { + utx.ut_type = OLD_TIME; + (void)gettimeofday(&utx.ut_tv, NULL); + pututxline(&utx); + tv.tv_sec = tval; + tv.tv_usec = 0; + if (settimeofday(&tv, NULL) != 0) + err(1, "settimeofday (timeval)"); + utx.ut_type = NEW_TIME; + (void)gettimeofday(&utx.ut_tv, NULL); + pututxline(&utx); + } + + 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) +{ + (void)fprintf(stderr, "%s\n%s\n", + "usage: date [-jnRu] [-d dst] [-r seconds] [-t west] " + "[-v[+|-]val[ymwdHMS]] ... ", + unix2003_std ? + " " + "[-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]" : + " " + "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]"); + exit(1); +} |