355 lines
8.5 KiB
C
355 lines
8.5 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <err.h>
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#include <errno.h>
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#include <fcntl.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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int rw(char *, struct stat *, int);
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void stime_arg1(char *, struct timeval *);
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void stime_arg2(char *, int, struct timeval *);
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void stime_file(char *, struct timeval *);
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void usage(void);
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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 timeval tv[2];
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int (*stat_f)(const char *, struct stat *);
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int (*utimes_f)(const char *, const struct timeval *);
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int aflag, cflag, fflag, mflag, ch, fd, len, rval, timeset;
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char *p;
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aflag = cflag = fflag = mflag = timeset = 0;
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stat_f = stat;
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utimes_f = utimes;
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if (gettimeofday(&tv[0], NULL))
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err(1, "gettimeofday");
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while ((ch = getopt(argc, argv, "acfhmr:t:")) != -1)
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switch(ch) {
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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 'f':
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fflag = 1;
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break;
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case 'h':
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cflag = 1;
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stat_f = lstat;
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utimes_f = lutimes;
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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, tv);
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break;
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case 't':
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timeset = 1;
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stime_arg1(optarg, tv);
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break;
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case '?':
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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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/* Default is both -a and -m. */
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if (aflag == 0 && mflag == 0)
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aflag = mflag = 1;
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/*
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* If no -r or -t flag, at least two operands, the first of which
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* is an 8 or 10 digit number, use the obsolete time specification.
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*/
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if (!timeset && argc > 1) {
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(void)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, tv);
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}
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}
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/* Otherwise use the current time of day. */
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if (!timeset)
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tv[1] = tv[0];
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if (*argv == NULL)
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usage();
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for (rval = 0; *argv; ++argv) {
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/* See if the file exists. */
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if (stat_f(*argv, &sb) != 0) {
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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 || fstat(fd, &sb) || close(fd)) {
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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 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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if (!aflag)
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TIMESPEC_TO_TIMEVAL(&tv[0], &sb.st_atimespec);
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if (!mflag)
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TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
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/* Try utimes(2). */
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if (!utimes_f(*argv, tv))
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continue;
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/* If the user specified a time, nothing else we can do. */
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if (timeset) {
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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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/*
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* System V and POSIX 1003.1 require that a NULL argument
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* set the access/modification times to the current time.
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* The permission checks are different, too, in that the
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* ability to write the file is sufficient. Take a shot.
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*/
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if (!utimes_f(*argv, NULL))
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continue;
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/* Try reading/writing. */
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if (!S_ISLNK(sb.st_mode) && !S_ISDIR(sb.st_mode) &&
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rw(*argv, &sb, fflag))
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rval = 1;
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else
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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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void
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stime_arg1(char *arg, struct timeval *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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/* Start with the current time. */
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now = tvp[0].tv_sec;
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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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terr: errx(1,
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"out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
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tvp[0].tv_usec = tvp[1].tv_usec = 0;
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}
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void
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stime_arg2(char *arg, int year, struct timeval *tvp)
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{
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time_t now;
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struct tm *t;
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/* Start with the current time. */
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now = tvp[0].tv_sec;
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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_usec = tvp[1].tv_usec = 0;
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}
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void
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stime_file(char *fname, struct timeval *tvp)
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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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TIMESPEC_TO_TIMEVAL(tvp, &sb.st_atimespec);
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TIMESPEC_TO_TIMEVAL(tvp + 1, &sb.st_mtimespec);
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}
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int
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rw(char *fname, struct stat *sbp, int force)
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{
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int fd, needed_chmod, rval;
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u_char byte;
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/* Try regular files. */
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if (!S_ISREG(sbp->st_mode)) {
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warnx("%s: %s", fname, strerror(EFTYPE));
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return (1);
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}
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needed_chmod = rval = 0;
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if ((fd = open(fname, O_RDWR, 0)) == -1) {
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if (!force || chmod(fname, DEFFILEMODE))
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goto err;
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if ((fd = open(fname, O_RDWR, 0)) == -1)
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goto err;
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needed_chmod = 1;
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}
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if (sbp->st_size != 0) {
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if (read(fd, &byte, sizeof(byte)) != sizeof(byte))
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goto err;
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if (lseek(fd, (off_t)0, SEEK_SET) == -1)
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goto err;
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if (write(fd, &byte, sizeof(byte)) != sizeof(byte))
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goto err;
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} else {
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if (write(fd, &byte, sizeof(byte)) != sizeof(byte)) {
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err: rval = 1;
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warn("%s", fname);
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} else if (ftruncate(fd, (off_t)0)) {
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rval = 1;
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warn("%s: file modified", fname);
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}
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}
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if (close(fd) && rval != 1) {
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rval = 1;
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warn("%s", fname);
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}
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if (needed_chmod && chmod(fname, sbp->st_mode) && rval != 1) {
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rval = 1;
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warn("%s: permissions modified", fname);
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}
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return (rval);
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}
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void
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usage(void)
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{
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(void)fprintf(stderr, "usage: touch [-acfhm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...\n");
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exit(1);
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}
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