- add libbb function str_tolower to convert a string to lowercase.

[oweals/busybox.git] / coreutils / touch.c

diff --git a/coreutils/touch.c b/coreutils/touch.c
index ca4b981081143b8bda4e2d98e07874dadafb19f7..5f81b2380858dd9086e3c43b06be775c71ace2b0 100644 (file)
--- a/coreutils/touch.c
+++ b/coreutils/touch.c
@@ -1,20 +1,57 @@
-#include "internal.h"
-#include <sys/types.h>
-#include <stdio.h>
-#include <utime.h>
+/* 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.
+ */
 
-const char     touch_usage[] = "touch [-c] file [file ...]\n"
-"\n"
-"\tUpdate the last-modified date on the given file[s].\n";
+/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
 
-extern int
-touch_fn(const struct FileInfo * i)
+/* 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 "busybox.h"
+
+/* This is a NOFORK applet. Be very careful! */
+
+int touch_main(int argc, char **argv);
+int touch_main(int argc, char **argv)
 {
-       if ( (utime(i->source, 0) != 0) && (i->create != 1) ) {
-               if ( fopen(i->source, "w") == NULL ) {
-                       name_and_error(i->source);
-                       return 1;
-               }
+       int fd;
+       int status = EXIT_SUCCESS;
+       int flags = getopt32(argc, argv, "c");
+
+       argv += optind;
+
+       if (!*argv) {
+               bb_show_usage();
        }
-       return 0;
+
+       do {
+               if (utime(*argv, NULL)) {
+                       if (errno == ENOENT) {  /* no such file */
+                               if (flags) {    /* 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)) {
+                                       continue;
+                               }
+                       }
+                       status = EXIT_FAILURE;
+                       bb_perror_msg("%s", *argv);
+               }
+       } while (*++argv);
+
+       return status;
 }