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/* vi: set sw=4 ts=4: */
/*
* Mini touch implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t 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 "libbb.h"
/* 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)
{
#if ENABLE_DESKTOP
#if ENABLE_LONG_OPTS
static const char longopts[] ALIGN1 =
/* name, has_arg, val */
"no-create\0" No_argument "c"
"reference\0" Required_argument "r"
;
#endif
struct utimbuf timebuf;
char *reference_file = NULL;
#else
#define reference_file NULL
#define timebuf (*(struct utimbuf*)NULL)
#endif
int fd;
int status = EXIT_SUCCESS;
int opts;
#if ENABLE_DESKTOP
#if ENABLE_LONG_OPTS
applet_long_options = longopts;
#endif
#endif
opts = getopt32(argv, "c" IF_DESKTOP("r:")
/*ignored:*/ "fma"
IF_DESKTOP(, &reference_file));
opts &= 1; /* only -c bit is left */
argv += optind;
if (!*argv) {
bb_show_usage();
}
if (reference_file) {
struct stat stbuf;
xstat(reference_file, &stbuf);
timebuf.actime = stbuf.st_atime;
timebuf.modtime = stbuf.st_mtime;
}
do {
if (utime(*argv, reference_file ? &timebuf : NULL)) {
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,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
);
if ((fd >= 0) && !close(fd)) {
if (reference_file)
utime(*argv, &timebuf);
continue;
}
}
status = EXIT_FAILURE;
bb_simple_perror_msg(*argv);
}
} while (*++argv);
return status;
}
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