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-rw-r--r--readline/examples/rl.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/readline/examples/rl.c b/readline/examples/rl.c
new file mode 100644
index 00000000000..ccddd0fb752
--- /dev/null
+++ b/readline/examples/rl.c
@@ -0,0 +1,117 @@
+/*
+ * rl - command-line interface to read a line from the standard input
+ * (or another fd) using readline.
+ *
+ * usage: rl [-p prompt] [-u unit] [-d default]
+ */
+
+/*
+ * Remove the next line if you're compiling this against an installed
+ * libreadline.a
+ */
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <sys/types.h>
+#include "posixstat.h"
+#include "readline.h"
+#include "history.h"
+
+extern int optind;
+extern char *optarg;
+
+#if !defined (strchr) && !defined (__STDC__)
+extern char *strrchr();
+#endif
+
+static char *progname;
+static char *deftext;
+
+static int
+set_deftext ()
+{
+ if (deftext)
+ {
+ rl_insert_text (deftext);
+ deftext = (char *)NULL;
+ rl_startup_hook = (Function *)NULL;
+ }
+}
+
+usage()
+{
+ fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default]\n",
+ progname, progname);
+}
+
+main (argc, argv)
+ int argc;
+ char **argv;
+{
+ char *temp, *prompt;
+ struct stat sb;
+ int done, opt, fd;
+ FILE *ifp;
+
+ progname = strrchr(argv[0], '/');
+ if (progname == 0)
+ progname = argv[0];
+ else
+ progname++;
+
+ /* defaults */
+ prompt = "readline$ ";
+ fd = 0;
+ deftext = (char *)0;
+
+ while ((opt = getopt(argc, argv, "p:u:d:")) != EOF)
+ {
+ switch (opt)
+ {
+ case 'p':
+ prompt = optarg;
+ break;
+ case 'u':
+ fd = atoi(optarg);
+ if (fd < 0)
+ {
+ fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg);
+ exit (2);
+ }
+ break;
+ case 'd':
+ deftext = optarg;
+ break;
+ default:
+ usage ();
+ exit (2);
+ }
+ }
+
+ if (fd != 0)
+ {
+ if (fstat (fd, &sb) < 0)
+ {
+ fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd);
+ exit (1);
+ }
+ ifp = fdopen (fd, "r");
+ rl_instream = ifp;
+ }
+
+ if (deftext && *deftext)
+ rl_startup_hook = set_deftext;
+
+ temp = readline (prompt);
+
+ /* Test for EOF. */
+ if (temp == 0)
+ exit (1);
+
+ puts (temp);
+ exit (0);
+}