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option.c revision 1.5 
      1 /*	$NetBSD: option.c,v 1.5 2001/06/11 01:50:50 wiz Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 Mark Nudleman
      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. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 #ifndef lint
     39 #if 0
     40 static char sccsid[] = "@(#)option.c	8.1 (Berkeley) 6/6/93";
     41 #else
     42 __RCSID("$NetBSD: option.c,v 1.5 2001/06/11 01:50:50 wiz Exp $");
     43 #endif
     44 #endif /* not lint */
     45 
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <unistd.h>
     49 
     50 #include "less.h"
     51 #include "extern.h"
     52 
     53 int top_scroll;			/* Repaint screen from top */
     54 int bs_mode;			/* How to process backspaces */
     55 int caseless;			/* Do "caseless" searches */
     56 int cbufs = 10;			/* Current number of buffers */
     57 int linenums = 1;		/* Use line numbers */
     58 int quit_at_eof;
     59 int squeeze;			/* Squeeze multiple blank lines into one */
     60 int tabstop = 8;		/* Tab settings */
     61 
     62 char *firstsearch;
     63 
     64 int
     65 option(argc, argv)
     66 	int argc;
     67 	char **argv;
     68 {
     69 	static int sc_window_set = 0;
     70 	int ch;
     71 	char *p;
     72 
     73 	/* backward compatible processing for "+/search" */
     74 	char **a;
     75 	for (a = argv; *a; ++a)
     76 		if ((*a)[0] == '+' && (*a)[1] == '/')
     77 			(*a)[0] = '-';
     78 
     79 	optind = 1;		/* called twice, re-init getopt. */
     80 	while ((ch = getopt(argc, argv, "0123456789/:ceinst:ux:f")) != -1)
     81 		switch((char)ch) {
     82 		case '0': case '1': case '2': case '3': case '4':
     83 		case '5': case '6': case '7': case '8': case '9':
     84 			/*
     85 			 * kludge: more was originally designed to take
     86 			 * a number after a dash.
     87 			 */
     88 			if (!sc_window_set) {
     89 				p = argv[optind - 1];
     90 				if (p[0] == '-' && p[1] == ch && !p[2])
     91 					sc_height = atoi(++p);
     92 				else
     93 					sc_height = atoi(argv[optind] + 1);
     94 				sc_window_set = 1;
     95 			}
     96 			break;
     97 		case '/':
     98 			firstsearch = optarg;
     99 			break;
    100 		case 'c':
    101 			top_scroll = 1;
    102 			break;
    103 		case 'e':
    104 			quit_at_eof = 1;
    105 			break;
    106 		case 'i':
    107 			caseless = 1;
    108 			break;
    109 		case 'n':
    110 			linenums = 0;
    111 			break;
    112 		case 's':
    113 			squeeze = 1;
    114 			break;
    115 		case 'u':
    116 			bs_mode = 1;
    117 			break;
    118 		case 'x':
    119 			tabstop = atoi(optarg);
    120 			if (tabstop <= 0)
    121 				tabstop = 8;
    122 			break;
    123 		case 'f':	/* ignore -f, compatibility with old more */
    124 			break;
    125 		case '?':
    126 		default:
    127 			fprintf(stderr,
    128 			    "usage: more [-ceinus] [-x tabs] [-/ pattern] [-#] [file ...]\n");
    129 			exit(1);
    130 		}
    131 	return(optind);
    132 }
    133