-// $Id: readlink.c,v 1.1 2003/09/29 22:01:57 ensc Exp $
+// $Id: readlink.c 1980 2005-03-24 12:44:17Z ensc $
// Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
-// based on readlink.cc by Jacques Gelinas
//
// 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
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-/*
- Copyright Jacques Gelinas jack@solucorp.qc.ca
- Distributed under the Gnu Public License, see the License file
- in this package.
-*/
-#include <stdio.h>
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "util.h"
+
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
+#include <stdio.h>
+
+static void
+showHelp(char const *cmd)
+{
+ WRITE_MSG(1, "Usage: ");
+ WRITE_STR(1, cmd);
+ WRITE_MSG(1,
+ " [--] <filename>\n"
+ "\n"
+ "Display value of a symbolic link on standard output.\n"
+ "\n"
+ "Please report bugs to " PACKAGE_BUGREPORT "\n");
+ exit(0);
+}
+
+static void
+showVersion()
+{
+ WRITE_MSG(1,
+ "readlink " VERSION " -- display value of symlink\n"
+ "This program is part of " PACKAGE_STRING "\n\n"
+ "Copyright (C) 2004 Enrico Scholz\n"
+ VERSION_COPYRIGHT_DISCLAIMER);
+ exit(0);
+}
+
int main (int argc, char *argv[])
{
- int ret = -1;
- if (argc != 2){
- fprintf (stderr,"readlink symlink-file\n");
- fprintf (stderr,"Prints the contents of a symlink\n");
- }else{
- char buf[PATH_MAX];
- int len = readlink (argv[1],buf,sizeof(buf)-1);
- if (len > 0){
- buf[len] = '\0';
- printf ("%s\n",buf);
- ret = 0;
- }else{
- fprintf (stderr,"readlink failed for file %s (%s)\n"
- ,argv[1],strerror(errno));
- }
- }
- return ret;
+ char buf[PATH_MAX + 2];
+ int idx = 1;
+ int len;
+
+ if (argc>=2) {
+ if (strcmp(argv[1], "--help") ==0) showHelp(argv[0]);
+ if (strcmp(argv[1], "--version")==0) showVersion();
+ if (strcmp(argv[1], "--") ==0) ++idx;
+ }
+ if (argc<idx+1)
+ WRITE_MSG(2, "No filename specified; use '--help' for more information\n");
+ else if ((len=readlink(argv[idx], buf, sizeof(buf)-2))==-1)
+ PERROR_Q("readlink: readlink", argv[idx]);
+ else {
+ buf[len++] = '\n';
+ Vwrite(1, buf, len);
+ return EXIT_SUCCESS;
+ }
+
+ return EXIT_FAILURE;
}