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-rw-r--r--examples/rlcat.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/examples/rlcat.c b/examples/rlcat.c
new file mode 100644
index 0000000..b494241
--- /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) == EOF)
+ 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;
+}