1 /*
2 * rlcat - cat(1) using readline
3 *
4 * usage: rlcat
5 */
6
7 /* Copyright (C) 1987-2002 Free Software Foundation, Inc.
8
9 This file is part of the GNU Readline Library, a library for
10 reading lines of text with interactive input and history editing.
11
12 The GNU Readline Library is free software; you can redistribute it
13 and/or modify it under the terms of the GNU General Public License
14 as published by the Free Software Foundation; either version 2, or
15 (at your option) any later version.
16
17 The GNU Readline Library is distributed in the hope that it will be
18 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
19 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 The GNU General Public License is often shipped with GNU software, and
23 is generally kept in a file called COPYING or LICENSE. If you do not
24 have a copy of the license, write to the Free Software Foundation,
25 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
26
27 #if defined (HAVE_CONFIG_H)
28 # include <config.h>
29 #endif
30
31 #ifdef HAVE_UNISTD_H
32 # include <unistd.h>
33 #endif
34
35 #include <sys/types.h>
36 #include "posixstat.h"
37
38 #include <stdio.h>
39 #include <ctype.h>
40 #include <string.h>
41 #include <errno.h>
42
43 #ifdef HAVE_STDLIB_H
44 # include <stdlib.h>
45 #else
46 extern void exit();
47 #endif
48
49 #ifndef errno
50 extern int errno;
51 #endif
52
53 #if defined (READLINE_LIBRARY)
54 # include "readline.h"
55 # include "history.h"
56 #else
57 # include <readline/readline.h>
58 # include <readline/history.h>
59 #endif
60
61 extern int optind;
62 extern char *optarg;
63
64 static int stdcat();
65
66 static char *progname;
67 static int vflag;
68
69 static void
usage()70 usage()
71 {
72 fprintf (stderr, "%s: usage: %s [-vEVN] [filename]\n", progname, progname);
73 }
74
75 int
main(argc,argv)76 main (argc, argv)
77 int argc;
78 char **argv;
79 {
80 char *temp;
81 int opt, Vflag, Nflag;
82
83 progname = strrchr(argv[0], '/');
84 if (progname == 0)
85 progname = argv[0];
86 else
87 progname++;
88
89 vflag = Vflag = Nflag = 0;
90 while ((opt = getopt(argc, argv, "vEVN")) != EOF)
91 {
92 switch (opt)
93 {
94 case 'v':
95 vflag = 1;
96 break;
97 case 'V':
98 Vflag = 1;
99 break;
100 case 'E':
101 Vflag = 0;
102 break;
103 case 'N':
104 Nflag = 1;
105 break;
106 default:
107 usage ();
108 exit (2);
109 }
110 }
111
112 argc -= optind;
113 argv += optind;
114
115 if (isatty(0) == 0 || argc || Nflag)
116 return stdcat(argc, argv);
117
118 rl_variable_bind ("editing-mode", Vflag ? "vi" : "emacs");
119 while (temp = readline (""))
120 {
121 if (*temp)
122 add_history (temp);
123 printf ("%s\n", temp);
124 }
125
126 return (ferror (stdout));
127 }
128
129 static int
fcopy(fp)130 fcopy(fp)
131 FILE *fp;
132 {
133 int c;
134 char *x;
135
136 while ((c = getc(fp)) != EOF)
137 {
138 if (vflag && isascii ((unsigned char)c) && isprint((unsigned char)c) == 0)
139 {
140 x = rl_untranslate_keyseq (c);
141 if (fputs (x, stdout) != 0)
142 return 1;
143 }
144 else if (putchar (c) == EOF)
145 return 1;
146 }
147 return (ferror (stdout));
148 }
149
150 int
stdcat(argc,argv)151 stdcat (argc, argv)
152 int argc;
153 char **argv;
154 {
155 int i, fd, r;
156 char *s;
157 FILE *fp;
158
159 if (argc == 0)
160 return (fcopy(stdin));
161
162 for (i = 0, r = 1; i < argc; i++)
163 {
164 if (*argv[i] == '-' && argv[i][1] == 0)
165 fp = stdin;
166 else
167 {
168 fp = fopen (argv[i], "r");
169 if (fp == 0)
170 {
171 fprintf (stderr, "%s: %s: cannot open: %s\n", progname, argv[i], strerror(errno));
172 continue;
173 }
174 }
175 r = fcopy (fp);
176 if (fp != stdin)
177 fclose(fp);
178 }
179 return r;
180 }
181