lineedit: do not hang on error, but return error indicator.

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

diff --git a/coreutils/touch.c b/coreutils/touch.c
index ca4b981081143b8bda4e2d98e07874dadafb19f7..03aac3aa2f8f9a01cc8ceadb29138cf3d46c889f 100644 (file)
--- a/coreutils/touch.c
+++ b/coreutils/touch.c
@@ -1,20 +1,127 @@
-#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 source tree.
+ */
 
-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 "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 ( (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 opts;
+#if ENABLE_DESKTOP
+# if ENABLE_LONG_OPTS
+       static const char touch_longopts[] ALIGN1 =
+               /* name, has_arg, val */
+               "no-create\0"         No_argument       "c"
+               "reference\0"         Required_argument "r"
+               "date\0"              Required_argument "d"
+       ;
+# endif
+       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 timeval*)NULL)
+#endif
+
+#if ENABLE_DESKTOP && ENABLE_LONG_OPTS
+       applet_long_options = touch_longopts;
+#endif
+       /* -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 */
+       argv += optind;
+       if (!*argv) {
+               bb_show_usage();
+       }
+
+       if (reference_file) {
+               struct stat stbuf;
+               xstat(reference_file, &stbuf);
+               timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
        }
-       return 0;
+
+       if (date_str) {
+               struct tm tm_time;
+               time_t t;
+
+               //time(&t);
+               //localtime_r(&t, &tm_time);
+               memset(&tm_time, 0, sizeof(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 */
+               t = validate_tm_time(date_str, &tm_time);
+
+               timebuf[1].tv_sec = timebuf[0].tv_sec = t;
+       }
+
+       do {
+               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, 0666);
+                               if (fd >= 0) {
+                                       xclose(fd);
+                                       if (reference_file || date_str)
+                                               utimes(*argv, timebuf);
+                                       continue;
+                               }
+                       }
+                       status = EXIT_FAILURE;
+                       bb_simple_perror_msg(*argv);
+               }
+       } while (*++argv);
+
+       return status;
 }