mirror of
https://github.com/topjohnwu/ndk-busybox.git
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92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini touch implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Previous version called open() and then utime(). While this will be
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* be necessary to implement -r and -t, it currently only makes things bigger.
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* Also, exiting on a failure was a bug. All args should be processed.
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*/
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#include "libbb.h"
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/* This is a NOFORK applet. Be very careful! */
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/* coreutils implements:
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* -a change only the access time
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* -c, --no-create
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* do not create any files
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* -d, --date=STRING
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* parse STRING and use it instead of current time
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* -f (ignored, BSD compat)
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* -m change only the modification time
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* -r, --reference=FILE
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* use this file's times instead of current time
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* -t STAMP
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* use [[CC]YY]MMDDhhmm[.ss] instead of current time
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* --time=WORD
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* change the specified time: WORD is access, atime, or use
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*/
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int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int touch_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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#if ENABLE_DESKTOP
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struct utimbuf timebuf;
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char *reference_file = NULL;
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#else
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#define reference_file NULL
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#define timebuf (*(struct utimbuf*)NULL)
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#endif
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int fd;
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int status = EXIT_SUCCESS;
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int flags = getopt32(argv, "c" USE_DESKTOP("r:")
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/*ignored:*/ "fma"
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USE_DESKTOP(, &reference_file));
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flags &= 1; /* only -c bit is left */
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argv += optind;
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if (!*argv) {
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bb_show_usage();
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}
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if (reference_file) {
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struct stat stbuf;
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xstat(reference_file, &stbuf);
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timebuf.actime = stbuf.st_atime;
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timebuf.modtime = stbuf.st_mtime;
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}
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do {
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if (utime(*argv, reference_file ? &timebuf : NULL)) {
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if (errno == ENOENT) { /* no such file */
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if (flags) { /* creation is disabled, so ignore */
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continue;
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}
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/* Try to create the file. */
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fd = open(*argv, O_RDWR | O_CREAT,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
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);
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if ((fd >= 0) && !close(fd)) {
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if (reference_file)
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utime(*argv, &timebuf);
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continue;
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}
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}
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status = EXIT_FAILURE;
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bb_simple_perror_msg(*argv);
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}
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} while (*++argv);
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return status;
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}
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