1 /* $NetBSD: option.c,v 1.7 2003/10/13 14:34:25 agc Exp $ */
2
3 /*
4 * Copyright (c) 1988 Mark Nudelman
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 #ifndef lint
35 #if 0
36 static char sccsid[] = "@(#)option.c 8.1 (Berkeley) 6/6/93";
37 #else
38 __RCSID("$NetBSD: option.c,v 1.7 2003/10/13 14:34:25 agc Exp $");
39 #endif
40 #endif /* not lint */
41
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <unistd.h>
45
46 #include "less.h"
47 #include "extern.h"
48
49 int top_scroll; /* Repaint screen from top */
50 int bs_mode; /* How to process backspaces */
51 int caseless; /* Do "caseless" searches */
52 int cbufs = 10; /* Current number of buffers */
53 int linenums = 1; /* Use line numbers */
54 int quit_at_eof;
55 int squeeze; /* Squeeze multiple blank lines into one */
56 int tabstop = 8; /* Tab settings */
57
58 char *firstsearch;
59
60 int
option(argc,argv)61 option(argc, argv)
62 int argc;
63 char **argv;
64 {
65 static int sc_window_set = 0;
66 int ch;
67 char *p;
68
69 /* backward compatible processing for "+/search" */
70 char **a;
71 for (a = argv; *a; ++a)
72 if ((*a)[0] == '+' && (*a)[1] == '/')
73 (*a)[0] = '-';
74
75 optind = 1; /* called twice, re-init getopt. */
76 while ((ch = getopt(argc, argv, "0123456789/:ceinst:ux:f")) != -1)
77 switch((char)ch) {
78 case '0': case '1': case '2': case '3': case '4':
79 case '5': case '6': case '7': case '8': case '9':
80 /*
81 * kludge: more was originally designed to take
82 * a number after a dash.
83 */
84 if (!sc_window_set) {
85 p = argv[optind - 1];
86 if (p[0] == '-' && p[1] == ch && !p[2])
87 sc_height = atoi(++p);
88 else
89 sc_height = atoi(argv[optind] + 1);
90 sc_window_set = 1;
91 }
92 break;
93 case '/':
94 firstsearch = optarg;
95 break;
96 case 'c':
97 top_scroll = 1;
98 break;
99 case 'e':
100 quit_at_eof = 1;
101 break;
102 case 'i':
103 caseless = 1;
104 break;
105 case 'n':
106 linenums = 0;
107 break;
108 case 's':
109 squeeze = 1;
110 break;
111 case 'u':
112 bs_mode = 1;
113 break;
114 case 'x':
115 tabstop = atoi(optarg);
116 if (tabstop <= 0)
117 tabstop = 8;
118 break;
119 case 'f': /* ignore -f, compatibility with old more */
120 break;
121 case '?':
122 default:
123 fprintf(stderr,
124 "usage: more [-ceinus] [-x tabs] [-/ pattern] [-#] [file ...]\n");
125 exit(1);
126 }
127 return(optind);
128 }
129