Commit | Line | Data |
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cc88a640 JK |
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) 1987-2009 Free Software Foundation, Inc. | |
9 | ||
10 | This file is part of the GNU Readline Library (Readline), a library for | |
11 | reading lines of text with interactive input and history editing. | |
12 | ||
13 | Readline is free software: you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation, either version 3 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | Readline is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
25 | */ | |
26 | ||
27 | #if defined (HAVE_CONFIG_H) | |
28 | # include <config.h> | |
29 | #endif | |
30 | ||
31 | #include <stdio.h> | |
32 | #include <sys/types.h> | |
33 | ||
34 | #ifdef HAVE_STDLIB_H | |
35 | # include <stdlib.h> | |
36 | #else | |
37 | extern void exit(); | |
38 | #endif | |
39 | ||
40 | #if defined (READLINE_LIBRARY) | |
41 | # include "posixstat.h" | |
42 | # include "readline.h" | |
43 | # include "history.h" | |
44 | #else | |
45 | # include <sys/stat.h> | |
46 | # include <readline/readline.h> | |
47 | # include <readline/history.h> | |
48 | #endif | |
49 | ||
50 | extern int optind; | |
51 | extern char *optarg; | |
52 | ||
53 | #if !defined (strchr) && !defined (__STDC__) | |
54 | extern char *strrchr(); | |
55 | #endif | |
56 | ||
57 | static char *progname; | |
58 | static char *deftext; | |
59 | ||
60 | static int | |
61 | event_hook () | |
62 | { | |
63 | fprintf (stderr, "ding!\n"); | |
64 | sleep (1); | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int | |
69 | set_deftext () | |
70 | { | |
71 | if (deftext) | |
72 | { | |
73 | rl_insert_text (deftext); | |
74 | deftext = (char *)NULL; | |
75 | rl_startup_hook = (rl_hook_func_t *)NULL; | |
76 | } | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static void | |
81 | usage() | |
82 | { | |
83 | fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n", | |
84 | progname, progname); | |
85 | } | |
86 | ||
87 | int | |
88 | main (argc, argv) | |
89 | int argc; | |
90 | char **argv; | |
91 | { | |
92 | char *temp, *prompt; | |
93 | struct stat sb; | |
94 | int opt, fd, nch; | |
95 | FILE *ifp; | |
96 | ||
97 | progname = strrchr(argv[0], '/'); | |
98 | if (progname == 0) | |
99 | progname = argv[0]; | |
100 | else | |
101 | progname++; | |
102 | ||
103 | /* defaults */ | |
104 | prompt = "readline$ "; | |
105 | fd = nch = 0; | |
106 | deftext = (char *)0; | |
107 | ||
108 | while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF) | |
109 | { | |
110 | switch (opt) | |
111 | { | |
112 | case 'p': | |
113 | prompt = optarg; | |
114 | break; | |
115 | case 'u': | |
116 | fd = atoi(optarg); | |
117 | if (fd < 0) | |
118 | { | |
119 | fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg); | |
120 | exit (2); | |
121 | } | |
122 | break; | |
123 | case 'd': | |
124 | deftext = optarg; | |
125 | break; | |
126 | case 'n': | |
127 | nch = atoi(optarg); | |
128 | if (nch < 0) | |
129 | { | |
130 | fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg); | |
131 | exit (2); | |
132 | } | |
133 | break; | |
134 | default: | |
135 | usage (); | |
136 | exit (2); | |
137 | } | |
138 | } | |
139 | ||
140 | if (fd != 0) | |
141 | { | |
142 | if (fstat (fd, &sb) < 0) | |
143 | { | |
144 | fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd); | |
145 | exit (1); | |
146 | } | |
147 | ifp = fdopen (fd, "r"); | |
148 | rl_instream = ifp; | |
149 | } | |
150 | ||
151 | if (deftext && *deftext) | |
152 | rl_startup_hook = set_deftext; | |
153 | ||
154 | if (nch > 0) | |
155 | rl_num_chars_to_read = nch; | |
156 | ||
157 | rl_event_hook = event_hook; | |
158 | temp = readline (prompt); | |
159 | ||
160 | /* Test for EOF. */ | |
161 | if (temp == 0) | |
162 | exit (1); | |
163 | ||
164 | printf ("%s\n", temp); | |
165 | exit (0); | |
166 | } |