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touch: support -r REF_FILE if ENABLE_DESKTOP (needed for blackfin compile)

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function                                             old     new   delta
touch_main                                           136     221     +85
This commit is contained in:
Denis Vlasenko 2008-06-28 01:18:09 +00:00
parent b75fe798bb
commit ed90bdabb4
1 changed files with 39 additions and 6 deletions
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45
coreutils/touch.c
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@ -21,24 +21,55 @@
/* 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 ATTRIBUTE_UNUSED, char **argv)
{
#if ENABLE_DESKTOP
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 flags = getopt32(argv, "cf");
int flags = getopt32(argv, "c" USE_DESKTOP("r:")
/*ignored:*/ "fma"
USE_DESKTOP(, &reference_file));
flags &= 1; /* ignoring -f (BSD compat thingy) */
flags &= 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, NULL)) {
if (errno == ENOENT) { /* no such file */
if (flags) { /* Creation is disabled, so ignore. */
if (utime(*argv, reference_file ? &timebuf : NULL)) {
if (errno == ENOENT) { /* no such file */
if (flags) { /* creation is disabled, so ignore */
continue;
}
/* Try to create the file. */
@ -46,6 +77,8 @@ int touch_main(int argc ATTRIBUTE_UNUSED, char **argv)
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
);
if ((fd >= 0) && !close(fd)) {
if (reference_file)
utime(*argv, &timebuf);
continue;
}
}