Commit | Line | Data |
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d60d9f65 SS |
1 | /* |
2 | * rl - command-line interface to read a line from the standard input | |
3 | * (or another fd) using readline. | |
4 | * | |
1b17e766 | 5 | * usage: rl [-p prompt] [-u unit] [-d default] [-n nchars] |
d60d9f65 SS |
6 | */ |
7 | ||
cc88a640 | 8 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. |
9255ee31 | 9 | |
cc88a640 | 10 | This file is part of the GNU Readline Library (Readline), a library for |
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11 | reading lines of text with interactive input and history editing. |
12 | ||
cc88a640 JK |
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 | |
9255ee31 EZ |
16 | (at your option) any later version. |
17 | ||
cc88a640 JK |
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 | |
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21 | GNU General Public License for more details. |
22 | ||
cc88a640 JK |
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 | */ | |
9255ee31 | 26 | |
d60d9f65 SS |
27 | #if defined (HAVE_CONFIG_H) |
28 | # include <config.h> | |
29 | #endif | |
30 | ||
775e241e | 31 | #include <unistd.h> |
d60d9f65 SS |
32 | #include <stdio.h> |
33 | #include <sys/types.h> | |
5bdf8622 DJ |
34 | |
35 | #ifdef HAVE_STDLIB_H | |
36 | # include <stdlib.h> | |
37 | #else | |
38 | extern void exit(); | |
39 | #endif | |
1b17e766 EZ |
40 | |
41 | #if defined (READLINE_LIBRARY) | |
5bdf8622 | 42 | # include "posixstat.h" |
1b17e766 EZ |
43 | # include "readline.h" |
44 | # include "history.h" | |
45 | #else | |
5bdf8622 | 46 | # include <sys/stat.h> |
1b17e766 EZ |
47 | # include <readline/readline.h> |
48 | # include <readline/history.h> | |
49 | #endif | |
d60d9f65 SS |
50 | |
51 | extern int optind; | |
52 | extern char *optarg; | |
53 | ||
54 | #if !defined (strchr) && !defined (__STDC__) | |
55 | extern char *strrchr(); | |
56 | #endif | |
57 | ||
58 | static char *progname; | |
59 | static char *deftext; | |
60 | ||
61 | static int | |
62 | set_deftext () | |
63 | { | |
64 | if (deftext) | |
65 | { | |
66 | rl_insert_text (deftext); | |
67 | deftext = (char *)NULL; | |
9255ee31 | 68 | rl_startup_hook = (rl_hook_func_t *)NULL; |
d60d9f65 | 69 | } |
1b17e766 | 70 | return 0; |
d60d9f65 SS |
71 | } |
72 | ||
c862e87b | 73 | static void |
d60d9f65 SS |
74 | usage() |
75 | { | |
1b17e766 | 76 | fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n", |
d60d9f65 SS |
77 | progname, progname); |
78 | } | |
79 | ||
1b17e766 | 80 | int |
d60d9f65 SS |
81 | main (argc, argv) |
82 | int argc; | |
83 | char **argv; | |
84 | { | |
85 | char *temp, *prompt; | |
86 | struct stat sb; | |
1b17e766 | 87 | int opt, fd, nch; |
d60d9f65 SS |
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$ "; | |
1b17e766 | 98 | fd = nch = 0; |
d60d9f65 SS |
99 | deftext = (char *)0; |
100 | ||
1b17e766 | 101 | while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF) |
d60d9f65 SS |
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; | |
1b17e766 EZ |
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; | |
d60d9f65 SS |
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 | ||
1b17e766 EZ |
147 | if (nch > 0) |
148 | rl_num_chars_to_read = nch; | |
149 | ||
d60d9f65 SS |
150 | temp = readline (prompt); |
151 | ||
152 | /* Test for EOF. */ | |
153 | if (temp == 0) | |
154 | exit (1); | |
155 | ||
9255ee31 | 156 | printf ("%s\n", temp); |
d60d9f65 SS |
157 | exit (0); |
158 | } |