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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 | ||
cb41b9e7 TT |
31 | #ifdef HAVE_UNISTD_H |
32 | # include <unistd.h> | |
33 | #else | |
34 | extern int getopt(); | |
35 | extern int sleep(); | |
36 | #endif | |
37 | ||
cc88a640 JK |
38 | #include <stdio.h> |
39 | #include <sys/types.h> | |
40 | ||
41 | #ifdef HAVE_STDLIB_H | |
42 | # include <stdlib.h> | |
43 | #else | |
44 | extern void exit(); | |
45 | #endif | |
46 | ||
47 | #if defined (READLINE_LIBRARY) | |
48 | # include "posixstat.h" | |
49 | # include "readline.h" | |
50 | # include "history.h" | |
51 | #else | |
52 | # include <sys/stat.h> | |
53 | # include <readline/readline.h> | |
54 | # include <readline/history.h> | |
55 | #endif | |
56 | ||
57 | extern int optind; | |
58 | extern char *optarg; | |
59 | ||
60 | #if !defined (strchr) && !defined (__STDC__) | |
61 | extern char *strrchr(); | |
62 | #endif | |
63 | ||
64 | static char *progname; | |
65 | static char *deftext; | |
66 | ||
67 | static int | |
68 | event_hook () | |
69 | { | |
70 | fprintf (stderr, "ding!\n"); | |
71 | sleep (1); | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static int | |
76 | set_deftext () | |
77 | { | |
78 | if (deftext) | |
79 | { | |
80 | rl_insert_text (deftext); | |
81 | deftext = (char *)NULL; | |
82 | rl_startup_hook = (rl_hook_func_t *)NULL; | |
83 | } | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static void | |
88 | usage() | |
89 | { | |
90 | fprintf (stderr, "%s: usage: %s [-p prompt] [-u unit] [-d default] [-n nchars]\n", | |
91 | progname, progname); | |
92 | } | |
93 | ||
94 | int | |
95 | main (argc, argv) | |
96 | int argc; | |
97 | char **argv; | |
98 | { | |
99 | char *temp, *prompt; | |
100 | struct stat sb; | |
101 | int opt, fd, nch; | |
102 | FILE *ifp; | |
103 | ||
104 | progname = strrchr(argv[0], '/'); | |
105 | if (progname == 0) | |
106 | progname = argv[0]; | |
107 | else | |
108 | progname++; | |
109 | ||
110 | /* defaults */ | |
111 | prompt = "readline$ "; | |
112 | fd = nch = 0; | |
113 | deftext = (char *)0; | |
114 | ||
115 | while ((opt = getopt(argc, argv, "p:u:d:n:")) != EOF) | |
116 | { | |
117 | switch (opt) | |
118 | { | |
119 | case 'p': | |
120 | prompt = optarg; | |
121 | break; | |
122 | case 'u': | |
123 | fd = atoi(optarg); | |
124 | if (fd < 0) | |
125 | { | |
126 | fprintf (stderr, "%s: bad file descriptor `%s'\n", progname, optarg); | |
127 | exit (2); | |
128 | } | |
129 | break; | |
130 | case 'd': | |
131 | deftext = optarg; | |
132 | break; | |
133 | case 'n': | |
134 | nch = atoi(optarg); | |
135 | if (nch < 0) | |
136 | { | |
137 | fprintf (stderr, "%s: bad value for -n: `%s'\n", progname, optarg); | |
138 | exit (2); | |
139 | } | |
140 | break; | |
141 | default: | |
142 | usage (); | |
143 | exit (2); | |
144 | } | |
145 | } | |
146 | ||
147 | if (fd != 0) | |
148 | { | |
149 | if (fstat (fd, &sb) < 0) | |
150 | { | |
151 | fprintf (stderr, "%s: %d: bad file descriptor\n", progname, fd); | |
152 | exit (1); | |
153 | } | |
154 | ifp = fdopen (fd, "r"); | |
155 | rl_instream = ifp; | |
156 | } | |
157 | ||
158 | if (deftext && *deftext) | |
159 | rl_startup_hook = set_deftext; | |
160 | ||
161 | if (nch > 0) | |
162 | rl_num_chars_to_read = nch; | |
163 | ||
164 | rl_event_hook = event_hook; | |
165 | temp = readline (prompt); | |
166 | ||
167 | /* Test for EOF. */ | |
168 | if (temp == 0) | |
169 | exit (1); | |
170 | ||
171 | printf ("%s\n", temp); | |
172 | exit (0); | |
173 | } |