1/* 2 * rl - command-line interface to read a line from the standard input 3 * (or another fd) using readline. 4 * 5 * usage: rl [-p prompt] [-u unit] [-d default] [-n nchars] 6 */ 7 8/* Copyright (C) 1987-2002 Free Software Foundation, Inc. 9 10 This file is part of the GNU Readline Library, a library for 11 reading lines of text with interactive input and history editing. 12 13 The GNU Readline Library is free software; you can redistribute it 14 and/or modify it under the terms of the GNU General Public License 15 as published by the Free Software Foundation; either version 2, or 16 (at your option) any later version. 17 18 The GNU Readline Library is distributed in the hope that it will be 19 useful, but WITHOUT ANY WARRANTY; without even the implied warranty 20 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License for more details. 22 23 The GNU General Public License is often shipped with GNU software, and 24 is generally kept in a file called COPYING or LICENSE. If you do not 25 have a copy of the license, write to the Free Software Foundation, 26 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 27 28#if defined (HAVE_CONFIG_H) 29# include <config.h> 30#endif 31 32#include <stdio.h> 33#include <sys/types.h>
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47# include <readline/readline.h> 48# include <readline/history.h> 49#endif 50 51extern int optind; 52extern char *optarg; 53 54#if !defined (strchr) && !defined (__STDC__) 55extern char *strrchr(); 56#endif 57 58static char *progname; 59static char *deftext; 60 61static int 62set_deftext () 63{ 64 if (deftext) 65 { 66 rl_insert_text (deftext); 67 deftext = (char *)NULL; 68 rl_startup_hook = (rl_hook_func_t *)NULL; 69 } 70 return 0; 71} 72 73static void 74usage() 75{ 76 fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n", 77 progname, progname); 78} 79 80int 81main (argc, argv) 82 int argc; 83 char **argv; 84{ 85 char *temp, *prompt; 86 struct stat sb; 87 int opt, fd, nch; 88 FILE *ifp; 89 90 progname = strrchr(argv[0], '/'); 91 if (progname == 0) 92 progname = argv[0]; 93 else 94 progname++; 95 96 /* defaults */ 97 prompt = "readline$ "; 98 fd = nch = 0; 99 deftext = (char *)0; 100 101 while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF) 102 { 103 switch (opt) 104 { 105 case 'p': 106 prompt = optarg; 107 break; 108 case 'u': 109 fd = atoi(optarg); 110 if (fd < 0) 111 { 112 fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg); 113 exit (2); 114 } 115 break; 116 case 'd': 117 deftext = optarg; 118 break; 119 case 'n': 120 nch = atoi(optarg); 121 if (nch < 0) 122 { 123 fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg); 124 exit (2); 125 } 126 break; 127 default: 128 usage (); 129 exit (2); 130 } 131 } 132 133 if (fd != 0) 134 { 135 if (fstat (fd, &sb) < 0) 136 { 137 fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd); 138 exit (1); 139 } 140 ifp = fdopen (fd, "r"); 141 rl_instream = ifp; 142 } 143 144 if (deftext && *deftext) 145 rl_startup_hook = set_deftext; 146 147 if (nch > 0) 148 rl_num_chars_to_read = nch; 149 150 temp = readline (prompt); 151 152 /* Test for EOF. */ 153 if (temp == 0) 154 exit (1); 155 156 printf ("%s\n", temp); 157 exit (0); 158}
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