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