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      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
     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