minix/bin/date/date.c
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

350 lines
7.8 KiB
C

/* $NetBSD: date.c,v 1.60 2011/08/27 12:55:09 joerg Exp $ */
/*
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT(
"@(#) Copyright (c) 1985, 1987, 1988, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: date.c,v 1.60 2011/08/27 12:55:09 joerg Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <tzfile.h>
#include <unistd.h>
#include <util.h>
#include "extern.h"
static time_t tval;
static int aflag, jflag, rflag, nflag;
__dead static void badformat(void);
__dead static void badtime(void);
__dead static void badvalue(const char *);
static void setthetime(const char *);
__dead static void usage(void);
int
main(int argc, char *argv[])
{
char *buf;
size_t bufsiz;
const char *format;
int ch;
long long val;
struct tm *tm;
setprogname(argv[0]);
(void)setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "ad:jnr:u")) != -1) {
switch (ch) {
case 'a': /* adjust time slowly */
aflag = 1;
nflag = 1;
break;
case 'd':
#ifndef __minix
rflag = 1;
tval = parsedate(optarg, NULL, NULL);
if (tval == -1)
#endif
badarg: errx(EXIT_FAILURE,
"Cannot parse `%s'", optarg);
break;
case 'j': /* don't set time */
jflag = 1;
break;
case 'n': /* don't set network */
nflag = 1;
break;
case 'r': /* user specified seconds */
errno = 0;
val = strtoll(optarg, &buf, 0);
if (optarg[0] == '\0' || *buf != '\0')
goto badarg;
if (errno == ERANGE && (val == LLONG_MAX ||
val == LLONG_MIN))
err(EXIT_FAILURE, "Bad number `%s'", optarg);
rflag = 1;
tval = (time_t)val;
break;
case 'u': /* do everything in UTC */
(void)setenv("TZ", "UTC0", 1);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!rflag && time(&tval) == -1)
err(EXIT_FAILURE, "time");
/* allow the operands in any order */
if (*argv && **argv == '+') {
format = *argv;
++argv;
} else
format = "+%a %b %e %H:%M:%S %Z %Y";
if (*argv) {
setthetime(*argv);
++argv;
}
if (*argv && **argv == '+')
format = *argv;
if ((buf = malloc(bufsiz = 1024)) == NULL)
goto bad;
if ((tm = localtime(&tval)) == NULL)
err(EXIT_FAILURE, "localtime %lld failed", (long long)tval);
while (strftime(buf, bufsiz, format, tm) == 0)
if ((buf = realloc(buf, bufsiz <<= 1)) == NULL)
goto bad;
(void)printf("%s\n", buf + 1);
free(buf);
return 0;
bad:
err(EXIT_FAILURE, "Cannot allocate format buffer");
}
static void
badformat(void)
{
warnx("illegal time format");
usage();
}
static void
badtime(void)
{
errx(EXIT_FAILURE, "illegal time");
/* NOTREACHED */
}
static void
badvalue(const char *param)
{
warnx("invalid %s supplied", param);
usage();
}
#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
static void
setthetime(const char *p)
{
struct timeval tv;
time_t new_time;
struct tm *lt;
const char *dot, *t;
size_t len;
int yearset;
for (t = p, dot = NULL; *t; ++t) {
if (isdigit((unsigned char)*t))
continue;
if (*t == '.' && dot == NULL) {
dot = t;
continue;
}
badformat();
}
if ((lt = localtime(&tval)) == NULL)
err(EXIT_FAILURE, "localtime %lld failed", (long long)tval);
lt->tm_isdst = -1; /* Divine correct DST */
if (dot != NULL) { /* .ss */
len = strlen(dot);
if (len != 3)
badformat();
++dot;
lt->tm_sec = ATOI2(dot);
if (lt->tm_sec > 61)
badvalue("seconds");
} else {
len = 0;
lt->tm_sec = 0;
}
yearset = 0;
switch (strlen(p) - len) {
case 12: /* cc */
lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
if (lt->tm_year < 0)
badtime();
yearset = 1;
/* FALLTHROUGH */
case 10: /* yy */
if (yearset) {
lt->tm_year += ATOI2(p);
} else {
yearset = ATOI2(p);
if (yearset < 69)
lt->tm_year = yearset + 2000 - TM_YEAR_BASE;
else
lt->tm_year = yearset + 1900 - TM_YEAR_BASE;
}
/* FALLTHROUGH */
case 8: /* mm */
lt->tm_mon = ATOI2(p);
if (lt->tm_mon > 12 || lt->tm_mon == 0)
badvalue("month");
--lt->tm_mon; /* time struct is 0 - 11 */
/* FALLTHROUGH */
case 6: /* dd */
lt->tm_mday = ATOI2(p);
switch (lt->tm_mon) {
case 0:
case 2:
case 4:
case 6:
case 7:
case 9:
case 11:
if (lt->tm_mday > 31 || lt->tm_mday == 0)
badvalue("day of month");
break;
case 3:
case 5:
case 8:
case 10:
if (lt->tm_mday > 30 || lt->tm_mday == 0)
badvalue("day of month");
break;
case 1:
if (lt->tm_mday > 29 || lt->tm_mday == 0 ||
(lt->tm_mday == 29 &&
!isleap(lt->tm_year + TM_YEAR_BASE)))
badvalue("day of month");
break;
default:
badvalue("month");
break;
}
/* FALLTHROUGH */
case 4: /* hh */
lt->tm_hour = ATOI2(p);
if (lt->tm_hour > 23)
badvalue("hour");
/* FALLTHROUGH */
case 2: /* mm */
lt->tm_min = ATOI2(p);
if (lt->tm_min > 59)
badvalue("minute");
break;
case 0: /* was just .sss */
if (len != 0)
break;
/* FALLTHROUGH */
default:
badformat();
}
/* convert broken-down time to UTC clock time */
if ((new_time = mktime(lt)) == -1)
badtime();
/* if jflag is set, don't actually change the time, just return */
if (jflag) {
tval = new_time;
return;
}
/* set the time */
if (nflag || netsettime(new_time)) {
logwtmp("|", "date", "");
#if HAVE_ADJTIME
if (aflag) {
tv.tv_sec = new_time - tval;
tv.tv_usec = 0;
if (adjtime(&tv, NULL))
err(EXIT_FAILURE, "adjtime");
}
#else
if (aflag) {
err(EXIT_FAILURE, "no adjtime");
}
#endif
else {
tval = new_time;
tv.tv_sec = tval;
tv.tv_usec = 0;
if (settimeofday(&tv, NULL))
err(EXIT_FAILURE, "settimeofday");
}
logwtmp("{", "date", "");
}
if ((p = getlogin()) == NULL)
p = "???";
syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-ajnu] [-d date] [-r seconds] [+format]",
getprogname());
(void)fprintf(stderr, " [[[[[[CC]yy]mm]dd]HH]MM[.SS]]\n");
exit(EXIT_FAILURE);
/* NOTREACHED */
}