Add HAVE_STRVERSCMP, guard the only usage of strverscmp with #ifdef

[platform/upstream/busybox.git] / coreutils / touch.c

diff --git a/coreutils/touch.c b/coreutils/touch.c
index 1b4a5f0..0f980fd 100644 (file)
--- a/coreutils/touch.c
+++ b/coreutils/touch.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
 /* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
@@ -19,6 +19,34 @@
 
 #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.
+
+//applet:IF_TOUCH(APPLET_NOFORK(touch, touch, BB_DIR_BIN, BB_SUID_DROP, touch))
+
+//kbuild:lib-$(CONFIG_TOUCH) += touch.o
+
+//usage:#define touch_trivial_usage
+//usage:       "[-c]" IF_DESKTOP(" [-d DATE] [-r FILE]") " FILE [FILE]..."
+//usage:#define touch_full_usage "\n\n"
+//usage:       "Update the last-modified date on the given FILE[s]\n"
+//usage:     "\n       -c      Don't create files"
+//usage:       IF_DESKTOP(
+//usage:     "\n       -d DT   Date/time to use"
+//usage:     "\n       -r FILE Use FILE's date/time"
+//usage:       )
+//usage:
+//usage:#define touch_example_usage
+//usage:       "$ 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"
+
 /* This is a NOFORK applet. Be very careful! */
 
 /* coreutils implements:
@@ -40,6 +68,9 @@
 int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int touch_main(int argc UNUSED_PARAM, char **argv)
 {
+       int fd;
+       int status = EXIT_SUCCESS;
+       int opts;
 #if ENABLE_DESKTOP
 # if ENABLE_LONG_OPTS
        static const char touch_longopts[] ALIGN1 =
@@ -49,25 +80,27 @@ int touch_main(int argc UNUSED_PARAM, char **argv)
                "date\0"              Required_argument "d"
        ;
 # endif
-       struct utimbuf timebuf;
        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 utimbuf*)NULL)
+# define timebuf        ((struct timeval*)NULL)
 #endif
-       int fd;
-       int status = EXIT_SUCCESS;
-       int opts;
 
 #if ENABLE_DESKTOP && ENABLE_LONG_OPTS
        applet_long_options = touch_longopts;
 #endif
-       opts = getopt32(argv, "c" IF_DESKTOP("r:d:")
+       /* -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_DESKTOP("r:d:t:")
                                /*ignored:*/ "fma"
                                IF_DESKTOP(, &reference_file)
                                IF_DESKTOP(, &date_str)
+                               IF_DESKTOP(, &date_str)
        );
 
        opts &= 1; /* only -c bit is left */
@@ -79,40 +112,38 @@ int touch_main(int argc UNUSED_PARAM, char **argv)
        if (reference_file) {
                struct stat stbuf;
                xstat(reference_file, &stbuf);
-               timebuf.actime = stbuf.st_atime;
-               timebuf.modtime = stbuf.st_mtime;
+               timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
        }
 
        if (date_str) {
                struct tm tm_time;
                time_t t;
 
-               //time(&t);
-               //localtime_r(&t, &tm_time);
-               memset(&tm_time, 0, sizeof(tm_time));
+               //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 */
+               tm_time.tm_isdst = -1;  /* Be sure to recheck dst */
                t = validate_tm_time(date_str, &tm_time);
 
-               timebuf.actime = t;
-               timebuf.modtime = t;
+               timebuf[1].tv_sec = timebuf[0].tv_sec = t;
        }
 
        do {
-               if (utime(*argv, reference_file ? &timebuf : NULL)) {
+               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,
-                                                 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
-                                                 );
-                               if ((fd >= 0) && !close(fd)) {
-                                       if (reference_file)
-                                               utime(*argv, &timebuf);
+                               /* 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;
                                }
                        }