/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
static const char sccsid[] = "@(#)touch.c 8.1 (Berkeley) 6/6/93";
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
static void stime_arg1(const char *, struct timespec *);
static void stime_arg2(const char *, int, struct timespec *);
static void stime_darg(const char *, struct timespec *);
static void stime_file(const char *, struct timespec *);
static int timeoffset(const char *);
static void usage(const char *);
int
main(int argc, char *argv[])
{
struct stat sb;
struct timespec ts[2];
int atflag;
int Aflag, aflag, cflag, mflag, ch, fd, len, rval, timeset;
char *p;
char *myname;
myname = basename(argv[0]);
Aflag = aflag = cflag = mflag = timeset = 0;
atflag = 0;
ts[0].tv_sec = ts[1].tv_sec = 0;
ts[0].tv_nsec = ts[1].tv_nsec = UTIME_NOW;
while ((ch = getopt(argc, argv, "A:acd:fhmr:t:")) != -1)
switch(ch) {
case 'A':
Aflag = timeoffset(optarg);
break;
case 'a':
aflag = 1;
break;
case 'c':
cflag = 1;
break;
case 'd':
timeset = 1;
stime_darg(optarg, ts);
break;
case 'f':
/* No-op for compatibility. */
break;
case 'h':
cflag = 1;
atflag = AT_SYMLINK_NOFOLLOW;
break;
case 'm':
mflag = 1;
break;
case 'r':
timeset = 1;
stime_file(optarg, ts);
break;
case 't':
timeset = 1;
stime_arg1(optarg, ts);
break;
default:
usage(myname);
}
argc -= optind;
argv += optind;
if (aflag == 0 && mflag == 0)
aflag = mflag = 1;
if (timeset) {
if (Aflag) {
/*
* We're setting the time to an offset from a specified
* time. God knows why, but it means that we can set
* that time once and for all here.
*/
if (aflag)
ts[0].tv_sec += Aflag;
if (mflag)
ts[1].tv_sec += Aflag;
Aflag = 0; /* done our job */
}
} else {
/*
* If no -r or -t flag, at least two operands, the first of
* which is an 8 or 10 digit number, use the obsolete time
* specification, otherwise use the current time.
*/
if (argc > 1) {
strtol(argv[0], &p, 10);
len = p - argv[0];
if (*p == '\0' && (len == 8 || len == 10)) {
timeset = 1;
stime_arg2(*argv++, len == 10, ts);
}
}
/* Both times default to the same. */
ts[1] = ts[0];
}
if (!aflag)
ts[0].tv_nsec = UTIME_OMIT;
if (!mflag)
ts[1].tv_nsec = UTIME_OMIT;
if (*argv == NULL)
usage(myname);
if (Aflag)
cflag = 1;
for (rval = 0; *argv; ++argv) {
/* See if the file exists. */
if (fstatat(AT_FDCWD, *argv, &sb, atflag) != 0) {
if (errno != ENOENT) {
rval = 1;
warn("%s", *argv);
continue;
}
if (!cflag) {
/* Create the file. */
fd = open(*argv,
O_WRONLY | O_CREAT, DEFFILEMODE);
if (fd == -1) {
rval = 1;
warn("%s", *argv);
continue;
}
if (fstat(fd, &sb) < 0) {
warn("%s", *argv);
rval = 1;
}
if (close(fd) < 0) {
warn("%s", *argv);
rval = 1;
}
/* If using the current time, we're done. */
if (!timeset)
continue;
} else
continue;
}
/*
* We're adjusting the times based on the file times, not a
* specified time (that gets handled above).
*/
if (Aflag) {
if (aflag) {
ts[0] = sb.st_atim;
ts[0].tv_sec += Aflag;
}
if (mflag) {
ts[1] = sb.st_mtim;
ts[1].tv_sec += Aflag;
}
}
if (!utimensat(AT_FDCWD, *argv, ts, atflag))
continue;
rval = 1;
warn("%s", *argv);
}
exit(rval);
}
#define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
static void
stime_arg1(const char *arg, struct timespec *tvp)
{
time_t now;
struct tm *t;
int yearset;
char *p;
now = time(NULL);
if ((t = localtime(&now)) == NULL)
err(1, "localtime");
/* [[CC]YY]MMDDhhmm[.SS] */
if ((p = strchr(arg, '.')) == NULL)
t->tm_sec = 0; /* Seconds defaults to 0. */
else {
if (strlen(p + 1) != 2)
goto terr;
*p++ = '\0';
t->tm_sec = ATOI2(p);
}
yearset = 0;
switch(strlen(arg)) {
case 12: /* CCYYMMDDhhmm */
t->tm_year = ATOI2(arg);
t->tm_year *= 100;
yearset = 1;
/* FALLTHROUGH */
case 10: /* YYMMDDhhmm */
if (yearset) {
yearset = ATOI2(arg);
t->tm_year += yearset;
} else {
yearset = ATOI2(arg);
if (yearset < 69)
t->tm_year = yearset + 2000;
else
t->tm_year = yearset + 1900;
}
t->tm_year -= 1900; /* Convert to UNIX time. */
/* FALLTHROUGH */
case 8: /* MMDDhhmm */
t->tm_mon = ATOI2(arg);
--t->tm_mon; /* Convert from 01-12 to 00-11 */
t->tm_mday = ATOI2(arg);
t->tm_hour = ATOI2(arg);
t->tm_min = ATOI2(arg);
break;
default:
goto terr;
}
t->tm_isdst = -1; /* Figure out DST. */
tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
if (tvp[0].tv_sec == -1)
goto terr;
tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
return;
terr:
errx(1, "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
}
static void
stime_arg2(const char *arg, int year, struct timespec *tvp)
{
time_t now;
struct tm *t;
now = time(NULL);
if ((t = localtime(&now)) == NULL)
err(1, "localtime");
t->tm_mon = ATOI2(arg); /* MMDDhhmm[yy] */
--t->tm_mon; /* Convert from 01-12 to 00-11 */
t->tm_mday = ATOI2(arg);
t->tm_hour = ATOI2(arg);
t->tm_min = ATOI2(arg);
if (year) {
t->tm_year = ATOI2(arg);
if (t->tm_year < 39) /* support 2000-2038 not 1902-1969 */
t->tm_year += 100;
}
t->tm_isdst = -1; /* Figure out DST. */
tvp[0].tv_sec = tvp[1].tv_sec = mktime(t);
if (tvp[0].tv_sec == -1)
errx(1,
"out of range or illegal time specification: MMDDhhmm[yy]");
tvp[0].tv_nsec = tvp[1].tv_nsec = 0;
}
static void
stime_darg(const char *arg, struct timespec *tvp)
{
struct tm t = { .tm_sec = 0 };
const char *fmt, *colon;
char *p;
int val, isutc = 0;
tvp[0].tv_nsec = 0;
t.tm_isdst = -1;
colon = strchr(arg, ':');
if (colon == NULL || strchr(colon + 1, ':') == NULL)
goto bad;
fmt = strchr(arg, 'T') != NULL ? "%Y-%m-%dT%H:%M:%S" :
"%Y-%m-%d %H:%M:%S";
p = strptime(arg, fmt, &t);
if (p == NULL)
goto bad;
/* POSIX: must have at least one digit after dot */
if ((*p == '.' || *p == ',') && isdigit((unsigned char)p[1])) {
p++;
val = 100000000;
while (isdigit((unsigned char)*p)) {
tvp[0].tv_nsec += val * (*p - '0');
p++;
val /= 10;
}
}
if (*p == 'Z') {
isutc = 1;
p++;
}
if (*p != '\0')
goto bad;
tvp[0].tv_sec = isutc ? timegm(&t) : mktime(&t);
tvp[1] = tvp[0];
return;
bad:
errx(1, "out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz]");
}
/* Calculate a time offset in seconds, given an arg of the format [-]HHMMSS. */
int
timeoffset(const char *arg)
{
int offset;
int isneg;
offset = 0;
isneg = *arg == '-';
if (isneg)
arg++;
switch (strlen(arg)) {
default: /* invalid */
errx(1, "Invalid offset spec, must be [-][[HH]MM]SS");
case 6: /* HHMMSS */
offset = ATOI2(arg);
/* FALLTHROUGH */
case 4: /* MMSS */
offset = offset * 60 + ATOI2(arg);
/* FALLTHROUGH */
case 2: /* SS */
offset = offset * 60 + ATOI2(arg);
}
if (isneg)
return (-offset);
else
return (offset);
}
static void
stime_file(const char *fname, struct timespec *tsp)
{
struct stat sb;
if (stat(fname, &sb))
err(1, "%s", fname);
tsp[0] = sb.st_atim;
tsp[1] = sb.st_mtim;
}
static void
usage(const char *myname)
{
fprintf(stderr, "usage: %s [-A [-][[hh]mm]SS] [-achm] [-r file] "
"[-t [[CC]YY]MMDDhhmm[.SS]]\n"
" [-d YYYY-MM-DDThh:mm:SS[.frac][tz]] "
"file ...\n", myname);
exit(1);
}
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