tftp: optional tftp-hpa compat

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

diff --git a/coreutils/realpath.c b/coreutils/realpath.c
index b3f7e4957e87eb6185e6cc655a99c51fd6480615..f5f868744cc1857256827f94850824d6bed2db71 100644 (file)
--- a/coreutils/realpath.c
+++ b/coreutils/realpath.c
@@ -1,47 +1,52 @@
 /* vi: set sw=4 ts=4: */
-
-/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
-
-/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
+/*
+ * Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  *
  * Now does proper error checking on output and returns a failure exit code
  * if one or more paths cannot be resolved.
  *
- * 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.
  */
+//config:config REALPATH
+//config:      bool "realpath (1.6 kb)"
+//config:      default y
+//config:      help
+//config:      Return the canonicalized absolute pathname.
+//config:      This isn't provided by GNU shellutils, but where else does it belong.
+
+//applet:IF_REALPATH(APPLET_NOFORK(realpath, realpath, BB_DIR_USR_BIN, BB_SUID_DROP, realpath))
+
+//kbuild:lib-$(CONFIG_REALPATH) += realpath.o
 
-#include "busybox.h"
+/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
+
+//usage:#define realpath_trivial_usage
+//usage:       "FILE..."
+//usage:#define realpath_full_usage "\n\n"
+//usage:       "Return the absolute pathnames of given FILE"
+
+#include "libbb.h"
 
-int realpath_main(int argc, char **argv);
-int realpath_main(int argc, char **argv)
+int realpath_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int realpath_main(int argc UNUSED_PARAM, char **argv)
 {
        int retval = EXIT_SUCCESS;
 
-#if PATH_MAX > (BUFSIZ+1)
-       RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
-# define resolved_path_MUST_FREE 1
-#else
-#define resolved_path bb_common_bufsiz1
-# define resolved_path_MUST_FREE 0
-#endif
-
-       if (--argc == 0) {
+       if (!*++argv) {
                bb_show_usage();
        }
 
        do {
-               argv++;
-               if (realpath(*argv, resolved_path) != NULL) {
+               /* NOFORK: only one alloc is allowed; must free */
+               char *resolved_path = xmalloc_realpath_coreutils(*argv);
+               if (resolved_path != NULL) {
                        puts(resolved_path);
+                       free(resolved_path);
                } else {
                        retval = EXIT_FAILURE;
-                       bb_perror_msg("%s", *argv);
+                       bb_simple_perror_msg(*argv);
                }
-       } while (--argc);
-
-#if ENABLE_FEATURE_CLEAN_UP && resolved_path_MUST_FREE
-       RELEASE_CONFIG_BUFFER(resolved_path);
-#endif
+       } while (*++argv);
 
        fflush_stdout_and_exit(retval);
 }