Realpath applet

coreutils/realpath.c

@@ -0,0 +1,44 @@
+/*
+ *  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.
+ */
+
+#include <limits.h>
+#include <stdlib.h>
+
+#include "busybox.h"
+
+int realpath_main(int argc, char **argv)
+{
+	char *resolved_path;
+	int count;
+
+	if (argc == 1) {
+		show_usage();
+	}
+
+	resolved_path = malloc(PATH_MAX);
+
+	for (count = 1; count < argc; count++) {
+		resolved_path = realpath(argv[count], resolved_path);
+		if (resolved_path) {
+			puts(resolved_path);
+		} else {
+			perror_msg("%s", argv[count]);
+		}
+	}
+	free(resolved_path);
+
+	return(EXIT_SUCCESS);
+}

include/applets.h

@@ -416,6 +416,9 @@
 #ifdef CONFIG_READLINK
 	APPLET(readlink, readlink_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_REALPATH
+	APPLET(realpath, realpath_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_REBOOT
 	APPLET(reboot, reboot_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
 #endif

include/usage.h

@@ -1638,6 +1638,11 @@
 #define readlink_full_usage \
 	"Read a symbolic link."
 
+#define realpath_trivial_usage \
+	"pathname  ..."
+#define realpath_full_usage \
+	"return the canonicalized absolute pathnames of given arguments\n\n"
+	
 #define reboot_trivial_usage \
 	""
 #define reboot_full_usage \