New program, by Dmitry V. Levin.

1 files changed, 156 insertions, 0 deletions

diff --git a/src/readlink.c b/src/readlink.c
new file mode 100644
index 000000000..0c7e4298c
--- /dev/null
+++ b/src/readlink.c
@@ -0,0 +1,156 @@
+/* readlink -- display value of a symbolic link.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+
+   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, 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.  */
+
+/* Written by Dmitry V. Levin */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+#include <getopt.h>
+
+#include "system.h"
+#include "error.h"
+#include "xreadlink.h"
+#include "long-options.h"
+#include "quote.h"
+
+/* The official name of this program (e.g., no `g' prefix).  */
+#define PROGRAM_NAME "readlink"
+
+#define AUTHORS "Dmitry V. Levin"
+
+/* Name this program was run with.  */
+char *program_name;
+
+  /* If nonzero, canonicalize file name. */
+static int canonicalize;
+  /* If nonzero, do not output the trailing newline. */
+static int no_newline;
+  /* If nonzero, report error messages. */
+static int verbose;
+
+static struct option const longopts[] =
+{
+  {"canonicalize", no_argument, 0, 'f'},
+  {"no-newline", no_argument, 0, 'n'},
+  {"quiet", no_argument, 0, 'q'},
+  {"silent", no_argument, 0, 's'},
+  {"verbose", no_argument, 0, 'v'},
+  {GETOPT_HELP_OPTION_DECL},
+  {GETOPT_VERSION_OPTION_DECL},
+  {NULL, 0, NULL, 0}
+};
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    fprintf (stderr, _("Try `%s --help' for more information.\n"),
+	     program_name);
+  else
+    {
+      printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
+      fputs (_("Display value of a symbolic link on standard output.\n\n"),
+	     stdout);
+      fputs (_("\
+  -f, --canonicalize      canonicalize by following every symlink in every\n\
+                          component of the given path recursively\n\
+  -n, --no-newline        do not output the trailing newline\n\
+  -q, --quiet,\n\
+  -s, --silent            suppress most error messages\n\
+  -v, --verbose           report error messages\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
+    }
+  exit (status);
+}
+
+int
+main (int argc, char *const argv[])
+{
+  const char *fname;
+  char *value;
+  int optc;
+
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  if (argc < 1)
+    error (EXIT_FAILURE, 0, _("too few arguments"));
+
+  program_name = argv[0];
+
+  while ((optc = getopt_long (argc, argv, "fnqsv", longopts, NULL)) != -1)
+    {
+      switch (optc)
+	{
+	case 0:
+	  break;
+	case 'f':
+	  canonicalize = 1;
+	  break;
+	case 'n':
+	  no_newline = 1;
+	  break;
+	case 'q':
+	case 's':
+	  verbose = 0;
+	  break;
+	case 'v':
+	  verbose = 1;
+	  break;
+	case_GETOPT_HELP_CHAR;
+	case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+	default:
+	  usage (EXIT_FAILURE);
+	}
+    }
+
+  if (optind >= argc)
+    {
+      error (EXIT_SUCCESS, 0, _("too few arguments"));
+      usage (EXIT_FAILURE);
+    }
+
+  fname = argv[optind++];
+
+  if (optind < argc)
+    {
+      error (EXIT_SUCCESS, 0, _("too many arguments"));
+      usage (EXIT_FAILURE);
+    }
+
+  value = (canonicalize ? canonicalize_file_name : xreadlink) (fname);
+  if (value)
+    {
+      printf ("%s%s", value, (no_newline ? "" : "\n"));
+      free (value);
+      return EXIT_SUCCESS;
+    }
+
+  if (verbose)
+    error (EXIT_SUCCESS, errno, "%s", fname);
+
+  return EXIT_FAILURE;
+}