brctl: tweak help text, fix comments

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

diff --git a/coreutils/basename.c b/coreutils/basename.c
index ac371d274490844fcbc6363137c3480c2104a8cd..0dd2c43c78aaf67f076b2b9ba6f46d86774d24b3 100644 (file)
--- a/coreutils/basename.c
+++ b/coreutils/basename.c
@@ -2,64 +2,77 @@
 /*
  * Mini basename implementation for busybox
  *
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  *
+ * Changes:
+ * 1) Now checks for too many args.  Need at least one and at most two.
+ * 2) Don't check for options, as per SUSv3.
+ * 3) Save some space by using strcmp().  Calling strncmp() here was silly.
  */
+//config:config BASENAME
+//config:      bool "basename (438 bytes)"
+//config:      default y
+//config:      help
+//config:      basename is used to strip the directory and suffix from filenames,
+//config:      leaving just the filename itself. Enable this option if you wish
+//config:      to enable the 'basename' utility.
 
-#include "internal.h"
-#include <stdio.h>
+//applet:IF_BASENAME(APPLET_NOFORK(basename, basename, BB_DIR_USR_BIN, BB_SUID_DROP, basename))
 
-const char *basename_usage="basename FILE [SUFFIX]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-       "\nStrips directory path and suffixes from FILE.\n"
-       "If specified, also removes any trailing SUFFIX.\n"
-#endif
-;
+//kbuild:lib-$(CONFIG_BASENAME) += basename.o
 
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/basename.html */
 
-extern int basename_main(int argc, char **argv)
-{
-       int m, n;
-       char *s, *s1;
+//usage:#define basename_trivial_usage
+//usage:       "FILE [SUFFIX]"
+//usage:#define basename_full_usage "\n\n"
+//usage:       "Strip directory path and .SUFFIX from FILE"
+//usage:
+//usage:#define basename_example_usage
+//usage:       "$ basename /usr/local/bin/foo\n"
+//usage:       "foo\n"
+//usage:       "$ basename /usr/local/bin/\n"
+//usage:       "bin\n"
+//usage:       "$ basename /foo/bar.txt .txt\n"
+//usage:       "bar"
 
-       if ((argc < 2) || (**(argv + 1) == '-')) {
-               usage(basename_usage);
-       }
+#include "libbb.h"
 
-       argv++;
+/* This is a NOFORK applet. Be very careful! */
 
-       s1=*argv+strlen(*argv)-1;
-       while (s1 && *s1 == '/') {
-               *s1 = '\0';
-               s1--;
-       }
-       s = strrchr(*argv, '/');
-       if (s==NULL) s=*argv;
-       else s++;
+int basename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int basename_main(int argc UNUSED_PARAM, char **argv)
+{
+       size_t m, n;
+       char *s;
 
-       if (argc>2) {
+       if (argv[1] && strcmp(argv[1], "--") == 0) {
                argv++;
+       }
+       if (!argv[1])
+               bb_show_usage();
+
+       /* It should strip slash: /abc/def/ -> def */
+       s = bb_get_last_path_component_strip(*++argv);
+
+       m = strlen(s);
+       if (*++argv) {
+               if (argv[1])
+                       bb_show_usage();
                n = strlen(*argv);
-               m = strlen(s);
-               if (m>=n && strncmp(s+m-n, *argv, n)==0)
-                       s[m-n] = '\0';
+               if ((m > n) && (strcmp(s+m-n, *argv) == 0)) {
+                       m -= n;
+                       /*s[m] = '\0'; - redundant */
+               }
        }
-       printf("%s\n", s);
-       return(TRUE);
-}
 
+       /* puts(s) will do, but we can do without stdio this way: */
+       s[m++] = '\n';
+       /* NB: != is correct here: */
+       return full_write(STDOUT_FILENO, s, m) != (ssize_t)m;
+}