1 files changed, 179 insertions, 0 deletions
diff --git a/examples/rlcat.c b/examples/rlcat.c
new file mode 100644
index 0000000..fa9e06f
--- /dev/null
+++ b/examples/rlcat.c
@@ -0,0 +1,179 @@
+/*
+ * rlcat - cat(1) using readline
+ *
+ * usage: rlcat
+ */
+
+/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
+
+   This file is part of the GNU Readline Library (Readline), a library for
+   reading lines of text with interactive input and history editing.
+
+   Readline 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 3 of the License, or
+   (at your option) any later version.
+
+   Readline 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 Readline.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if defined (HAVE_CONFIG_H)
+#  include <config.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+
+#include <sys/types.h>
+#include "posixstat.h"
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+
+#ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+#else 
+extern void exit();
+#endif
+
+#ifndef errno
+extern int errno;
+#endif
+
+#if defined (READLINE_LIBRARY)
+#  include "readline.h"
+#  include "history.h"
+#else
+#  include <readline/readline.h>
+#  include <readline/history.h>
+#endif
+
+extern int optind;
+extern char *optarg;
+
+static int stdcat();
+
+static char *progname;
+static int vflag;
+
+static void
+usage()
+{
+  fprintf (stderr, "%s: usage: %s [-vEVN] [filename]\n", progname, progname);
+}
+
+int
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  char *temp;
+  int opt, Vflag, Nflag;
+
+  progname = strrchr(argv[0], '/');
+  if (progname == 0)
+    progname = argv[0];
+  else
+    progname++;
+
+  vflag = Vflag = Nflag = 0;
+  while ((opt = getopt(argc, argv, "vEVN")) != EOF)
+    {
+      switch (opt)
+	{
+	case 'v':
+	  vflag = 1;
+	  break;
+	case 'V':
+	  Vflag = 1;
+	  break;
+	case 'E':
+	  Vflag = 0;
+	  break;
+	case 'N':
+	  Nflag = 1;
+	  break;
+	default:
+	  usage ();
+	  exit (2);
+	}
+    }
+
+  argc -= optind;
+  argv += optind;
+
+  if (isatty(0) == 0 || argc || Nflag)
+    return stdcat(argc, argv);
+
+  rl_variable_bind ("editing-mode", Vflag ? "vi" : "emacs");
+  while (temp = readline (""))
+    {
+      if (*temp)
+        add_history (temp);
+      printf ("%s\n", temp);
+    }
+
+  return (ferror (stdout));
+}
+
+static int
+fcopy(fp)
+     FILE *fp;
+{
+  int c;
+  char *x;
+
+  while ((c = getc(fp)) != EOF)
+    {
+      if (vflag && isascii ((unsigned char)c) && isprint((unsigned char)c) == 0)
+	{
+	  x = rl_untranslate_keyseq (c);
+	  if (fputs (x, stdout) != 0)
+	    return 1;
+	}
+      else if (putchar (c) == EOF)
+        return 1;
+    }
+  return (ferror (stdout));
+}
+
+int
+stdcat (argc, argv)
+     int argc;
+     char **argv;
+{
+  int  i, fd, r;
+  char *s;
+  FILE *fp;
+
+  if (argc == 0)
+    return (fcopy(stdin));
+
+  for (i = 0, r = 1; i < argc; i++)
+    {
+      if (*argv[i] == '-' && argv[i][1] == 0)
+	fp = stdin;
+      else
+	{
+	  fp = fopen (argv[i], "r");
+	  if (fp == 0)
+	    {
+	      fprintf (stderr, "%s: %s: cannot open: %s\n", progname, argv[i], strerror(errno));
+	      continue;
+	    }
+        }
+      r = fcopy (fp);
+      if (fp != stdin)
+	fclose(fp);
+    }
+  return r;
+}