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option.c revision 1.3 
      1 /*	$NetBSD: option.c,v 1.3 1998/01/09 08:03:32 perry 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 #ifndef lint
     38 static char sccsid[] = "@(#)option.c	8.1 (Berkeley) 6/6/93";
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include <less.h>
     43 
     44 int top_scroll;			/* Repaint screen from top */
     45 int bs_mode;			/* How to process backspaces */
     46 int caseless;			/* Do "caseless" searches */
     47 int cbufs = 10;			/* Current number of buffers */
     48 int linenums = 1;		/* Use line numbers */
     49 int quit_at_eof;
     50 int squeeze;			/* Squeeze multiple blank lines into one */
     51 int tabstop = 8;		/* Tab settings */
     52 
     53 char *firstsearch;
     54 extern int sc_height;
     55 
     56 option(argc, argv)
     57 	int argc;
     58 	char **argv;
     59 {
     60 	extern char *optarg;
     61 	extern int optind;
     62 	static int sc_window_set = 0;
     63 	int ch;
     64 	char *p;
     65 
     66 	/* backward compatible processing for "+/search" */
     67 	char **a;
     68 	for (a = argv; *a; ++a)
     69 		if ((*a)[0] == '+' && (*a)[1] == '/')
     70 			(*a)[0] = '-';
     71 
     72 	optind = 1;		/* called twice, re-init getopt. */
     73 	while ((ch = getopt(argc, argv, "0123456789/:ceinst:ux:f")) != EOF)
     74 		switch((char)ch) {
     75 		case '0': case '1': case '2': case '3': case '4':
     76 		case '5': case '6': case '7': case '8': case '9':
     77 			/*
     78 			 * kludge: more was originally designed to take
     79 			 * a number after a dash.
     80 			 */
     81 			if (!sc_window_set) {
     82 				p = argv[optind - 1];
     83 				if (p[0] == '-' && p[1] == ch && !p[2])
     84 					sc_height = atoi(++p);
     85 				else
     86 					sc_height = atoi(argv[optind] + 1);
     87 				sc_window_set = 1;
     88 			}
     89 			break;
     90 		case '/':
     91 			firstsearch = optarg;
     92 			break;
     93 		case 'c':
     94 			top_scroll = 1;
     95 			break;
     96 		case 'e':
     97 			quit_at_eof = 1;
     98 			break;
     99 		case 'i':
    100 			caseless = 1;
    101 			break;
    102 		case 'n':
    103 			linenums = 0;
    104 			break;
    105 		case 's':
    106 			squeeze = 1;
    107 			break;
    108 		case 'u':
    109 			bs_mode = 1;
    110 			break;
    111 		case 'x':
    112 			tabstop = atoi(optarg);
    113 			if (tabstop <= 0)
    114 				tabstop = 8;
    115 			break;
    116 		case 'f':	/* ignore -f, compatability with old more */
    117 			break;
    118 		case '?':
    119 		default:
    120 			fprintf(stderr,
    121 			    "usage: more [-ceinus] [-x tabs] [-/ pattern] [-#] [file ...]\n");
    122 			exit(1);
    123 		}
    124 	return(optind);
    125 }
    126