+/* vi: set sw=4 ts=4: */
/*
* Mini touch implementation for busybox
*
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Copyright (C) 1999 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m not supported. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
+ * Previous version called open() and then utime(). While this will be
+ * be necessary to implement -r and -t, it currently only makes things bigger.
+ * Also, exiting on a failure was a bug. All args should be processed.
*/
-#include "internal.h"
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <utime.h>
-#include <errno.h>
+#include "libbb.h"
+//config:config TOUCH
+//config: bool "touch"
+//config: default y
+//config: help
+//config: touch is used to create or change the access and/or
+//config: modification timestamp of specified files.
+//config:
+//config:config FEATURE_TOUCH_SUSV3
+//config: bool "Add support for SUSV3 features (-d -t -r)"
+//config: default y
+//config: depends on TOUCH
+//config: help
+//config: Enable touch to use a reference file or a given date/time argument.
-static const char touch_usage[] = "touch [-c] file [file ...]\n\n"
-"\tUpdate the last-modified date on the given file[s].\n";
+//applet:IF_TOUCH(APPLET_NOFORK(touch, touch, BB_DIR_BIN, BB_SUID_DROP, touch))
+//kbuild:lib-$(CONFIG_TOUCH) += touch.o
+//usage:#define touch_trivial_usage
+//usage: "[-c]" IF_FEATURE_TOUCH_SUSV3(" [-d DATE] [-t DATE] [-r FILE]") " FILE..."
+//usage:#define touch_full_usage "\n\n"
+//usage: "Update the last-modified date on the given FILE[s]\n"
+//usage: "\n -c Don't create files"
+//usage: IF_FEATURE_TOUCH_SUSV3(
+//usage: "\n -d DT Date/time to use"
+//usage: "\n -t DT Date/time to use"
+//usage: "\n -r FILE Use FILE's date/time"
+//usage: )
+//usage:
+//usage:#define touch_example_usage
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "/bin/ls: /tmp/foo: No such file or directory\n"
+//usage: "$ touch /tmp/foo\n"
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-rw-rw-r-- 1 andersen andersen 0 Apr 15 01:11 /tmp/foo\n"
-extern int
-touch_main(int argc, char **argv)
+/* This is a NOFORK applet. Be very careful! */
+
+/* coreutils implements:
+ * -a change only the access time
+ * -c, --no-create
+ * do not create any files
+ * -d, --date=STRING
+ * parse STRING and use it instead of current time
+ * -f (ignored, BSD compat)
+ * -m change only the modification time
+ * -r, --reference=FILE
+ * use this file's times instead of current time
+ * -t STAMP
+ * use [[CC]YY]MMDDhhmm[.ss] instead of current time
+ * --time=WORD
+ * change the specified time: WORD is access, atime, or use
+ */
+
+int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int touch_main(int argc UNUSED_PARAM, char **argv)
{
- int fd;
- int create=TRUE;
-
- if (argc < 2) {
- usage( touch_usage);
- }
- argc--;
- argv++;
-
- /* Parse options */
- while (**argv == '-') {
- while (*++(*argv)) switch (**argv) {
- case 'c':
- create = FALSE;
- break;
- default:
- fprintf(stderr, "Unknown option: %c\n", **argv);
- exit( FALSE);
+ int fd;
+ int status = EXIT_SUCCESS;
+ int opts;
+#if ENABLE_FEATURE_TOUCH_SUSV3
+# if ENABLE_LONG_OPTS
+ static const char touch_longopts[] ALIGN1 =
+ /* name, has_arg, val */
+ "no-create\0" No_argument "c"
+ "reference\0" Required_argument "r"
+ "date\0" Required_argument "d"
+ ;
+# endif
+ char *reference_file = NULL;
+ char *date_str = NULL;
+ struct timeval timebuf[2];
+ timebuf[1].tv_usec = timebuf[0].tv_usec = 0;
+#else
+# define reference_file NULL
+# define date_str NULL
+# define timebuf ((struct timeval*)NULL)
+#endif
+
+#if ENABLE_FEATURE_TOUCH_SUSV3 && ENABLE_LONG_OPTS
+ applet_long_options = touch_longopts;
+#endif
+ /* -d and -t both set time. In coreutils,
+ * accepted data format differs a bit between -d and -t.
+ * We accept the same formats for both */
+ opts = getopt32(argv, "c" IF_FEATURE_TOUCH_SUSV3("r:d:t:")
+ /*ignored:*/ "fma"
+ IF_FEATURE_TOUCH_SUSV3(, &reference_file)
+ IF_FEATURE_TOUCH_SUSV3(, &date_str)
+ IF_FEATURE_TOUCH_SUSV3(, &date_str)
+ );
+
+ opts &= 1; /* only -c bit is left */
+ argv += optind;
+ if (!*argv) {
+ bb_show_usage();
}
- argc--;
- argv++;
- }
-
- fd = open (*argv, (create==FALSE)? O_RDWR : O_RDWR | O_CREAT, 0644);
- if (fd < 0 ) {
- if (create==FALSE && errno == ENOENT)
- exit( TRUE);
- else {
- perror("touch");
- exit( FALSE);
+
+ if (reference_file) {
+ struct stat stbuf;
+ xstat(reference_file, &stbuf);
+ timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
}
- }
- close( fd);
- if (utime (*argv, NULL)) {
- perror("touch");
- exit( FALSE);
- }
- else
- exit( TRUE);
-}
+ if (date_str) {
+ struct tm tm_time;
+ time_t t;
+ //memset(&tm_time, 0, sizeof(tm_time));
+ /* Better than memset: makes "HH:MM" dates meaningful */
+ time(&t);
+ localtime_r(&t, &tm_time);
+ parse_datestr(date_str, &tm_time);
+ /* Correct any day of week and day of year etc. fields */
+ tm_time.tm_isdst = -1; /* Be sure to recheck dst */
+ t = validate_tm_time(date_str, &tm_time);
+ timebuf[1].tv_sec = timebuf[0].tv_sec = t;
+ }
+ do {
+ if (utimes(*argv, (reference_file || date_str) ? timebuf : NULL) != 0) {
+ if (errno == ENOENT) { /* no such file */
+ if (opts) { /* creation is disabled, so ignore */
+ continue;
+ }
+ /* Try to create the file */
+ fd = open(*argv, O_RDWR | O_CREAT, 0666);
+ if (fd >= 0) {
+ xclose(fd);
+ if (reference_file || date_str)
+ utimes(*argv, timebuf);
+ continue;
+ }
+ }
+ status = EXIT_FAILURE;
+ bb_simple_perror_msg(*argv);
+ }
+ } while (*++argv);
+ return status;
+}
projects / oweals / busybox.git / blobdiff