diff options
Diffstat (limited to 'usr.bin/touch/touch.c')
| -rw-r--r-- | usr.bin/touch/touch.c | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/usr.bin/touch/touch.c b/usr.bin/touch/touch.c new file mode 100644 index 0000000..1963815 --- /dev/null +++ b/usr.bin/touch/touch.c @@ -0,0 +1,337 @@ +/* $NetBSD: touch.c,v 1.33 2015/03/02 03:17:24 enami Exp $ */ + +/* + * 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. + */ + +#include <sys/cdefs.h> +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1993\ + The Regents of the University of California. All rights reserved."); +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)touch.c 8.2 (Berkeley) 4/28/95"; +#endif +__RCSID("$NetBSD: touch.c,v 1.33 2015/03/02 03:17:24 enami Exp $"); +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/time.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <locale.h> +#include <time.h> +#include <tzfile.h> +#include <unistd.h> +#include <util.h> +#include <getopt.h> + +static void stime_arg0(char *, struct timespec *); +static void stime_arg1(char *, struct timespec *); +static void stime_arg2(char *, int, struct timespec *); +static void stime_file(char *, struct timespec *); +__dead static void usage(void); + +struct option touch_longopts[] = { + { "date", required_argument, 0, + 'd' }, + { "reference", required_argument, 0, + 'r' }, + { NULL, 0, 0, + 0 }, +}; + +int +main(int argc, char *argv[]) +{ + struct stat sb; + struct timespec ts[2]; + int aflag, cflag, hflag, mflag, ch, fd, len, rval, timeset; + char *p; + int (*change_file_times)(const char *, const struct timespec *); + int (*get_file_status)(const char *, struct stat *); + + setlocale(LC_ALL, ""); + + aflag = cflag = hflag = mflag = timeset = 0; + if (clock_gettime(CLOCK_REALTIME, &ts[0])) + err(1, "clock_gettime"); + + while ((ch = getopt_long(argc, argv, "acd:fhmr:t:", touch_longopts, + NULL)) != -1) + switch(ch) { + case 'a': + aflag = 1; + break; + case 'c': + cflag = 1; + break; + case 'd': + timeset = 1; + stime_arg0(optarg, ts); + break; + case 'f': + break; + case 'h': + hflag = 1; + break; + case 'm': + mflag = 1; + break; + case 'r': + timeset = 1; + stime_file(optarg, ts); + break; + case 't': + timeset = 1; + stime_arg1(optarg, ts); + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + /* Default is both -a and -m. */ + if (aflag == 0 && mflag == 0) + aflag = mflag = 1; + + if (hflag) { + cflag = 1; /* Don't create new file */ + change_file_times = lutimens; + get_file_status = lstat; + } else { + change_file_times = utimens; + get_file_status = stat; + } + + /* + * 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. + */ + if (!timeset && argc > 1) { + (void)strtol(argv[0], &p, 10); + len = p - argv[0]; + if (*p == '\0' && (len == 8 || len == 10)) { + timeset = 1; + stime_arg2(*argv++, len == 10, ts); + } + } + + /* Otherwise use the current time of day. */ + if (!timeset) + ts[1] = ts[0]; + + if (*argv == NULL) + usage(); + + for (rval = EXIT_SUCCESS; *argv; ++argv) { + /* See if the file exists. */ + if ((*get_file_status)(*argv, &sb)) { + if (!cflag) { + /* Create the file. */ + fd = open(*argv, + O_WRONLY | O_CREAT, DEFFILEMODE); + if (fd == -1 || fstat(fd, &sb) || close(fd)) { + rval = EXIT_FAILURE; + warn("%s", *argv); + continue; + } + + /* If using the current time, we're done. */ + if (!timeset) + continue; + } else + continue; + } + if (!aflag) + ts[0] = sb.st_atimespec; + if (!mflag) + ts[1] = sb.st_mtimespec; + + /* Try utimes(2). */ + if (!(*change_file_times)(*argv, ts)) + continue; + + /* If the user specified a time, nothing else we can do. */ + if (timeset) { + rval = EXIT_FAILURE; + warn("%s", *argv); + } + + /* + * System V and POSIX 1003.1 require that a NULL argument + * set the access/modification times to the current time. + * The permission checks are different, too, in that the + * ability to write the file is sufficient. Take a shot. + */ + if (!(*change_file_times)(*argv, NULL)) + continue; + + rval = EXIT_FAILURE; + warn("%s", *argv); + } + exit(rval); +} + +#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) + +static void +stime_arg0(char *arg, struct timespec *tsp) +{ + tsp[1].tv_sec = tsp[0].tv_sec = parsedate(arg, NULL, NULL); + if (tsp[0].tv_sec == -1) + errx(EXIT_FAILURE, "Could not parse `%s'", arg); + tsp[0].tv_nsec = tsp[1].tv_nsec = 0; +} + +static void +stime_arg1(char *arg, struct timespec *tsp) +{ + struct tm *t; + time_t tmptime; + int yearset; + char *p; + /* Start with the current time. */ + tmptime = tsp[0].tv_sec; + if ((t = localtime(&tmptime)) == NULL) + err(EXIT_FAILURE, "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) * 100 - TM_YEAR_BASE; + yearset = 1; + /* FALLTHROUGH */ + case 10: /* YYMMDDhhmm */ + if (yearset) { + t->tm_year += ATOI2(arg); + } else { + yearset = ATOI2(arg); + if (yearset < 69) + t->tm_year = yearset + 2000 - TM_YEAR_BASE; + else + t->tm_year = yearset + 1900 - TM_YEAR_BASE; + } + /* FALLTHROUGH */ + case 8: /* MMDDhhmm */ + t->tm_mon = ATOI2(arg); + --t->tm_mon; /* Convert from 01-12 to 00-11 */ + /* FALLTHROUGH */ + case 6: + t->tm_mday = ATOI2(arg); + /* FALLTHROUGH */ + case 4: + t->tm_hour = ATOI2(arg); + /* FALLTHROUGH */ + case 2: + t->tm_min = ATOI2(arg); + break; + default: + goto terr; + } + + t->tm_isdst = -1; /* Figure out DST. */ + tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); + if (tsp[0].tv_sec == -1) +terr: errx(EXIT_FAILURE, + "out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]"); + + tsp[0].tv_nsec = tsp[1].tv_nsec = 0; +} + +static void +stime_arg2(char *arg, int year, struct timespec *tsp) +{ + struct tm *t; + time_t tmptime; + /* Start with the current time. */ + tmptime = tsp[0].tv_sec; + if ((t = localtime(&tmptime)) == NULL) + err(EXIT_FAILURE, "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) { + year = ATOI2(arg); + if (year < 69) + t->tm_year = year + 2000 - TM_YEAR_BASE; + else + t->tm_year = year + 1900 - TM_YEAR_BASE; + } + t->tm_sec = 0; + + t->tm_isdst = -1; /* Figure out DST. */ + tsp[0].tv_sec = tsp[1].tv_sec = mktime(t); + if (tsp[0].tv_sec == -1) + errx(EXIT_FAILURE, + "out of range or illegal time specification: MMDDhhmm[yy]"); + + tsp[0].tv_nsec = tsp[1].tv_nsec = 0; +} + +static void +stime_file(char *fname, struct timespec *tsp) +{ + struct stat sb; + + if (stat(fname, &sb)) + err(1, "%s", fname); + tsp[0] = sb.st_atimespec; + tsp[1] = sb.st_mtimespec; +} + +static void +usage(void) +{ + (void)fprintf(stderr, + "Usage: %s [-acfhm] [-d|--date datetime] [-r|--reference file] [-t time] file ...\n", + getprogname()); + exit(EXIT_FAILURE); +} |