projects / unix-history / blame
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1 | /* |
| 2 | * Copyright (c) 1988 Mark Nudleman | |
| 3 | * Copyright (c) 1988 Regents of the University of California. | |
| 4 | * All rights reserved. | |
| 5 | * | |
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6 | * Redistribution and use in source and binary forms are permitted |
| 7 | * provided that the above copyright notice and this paragraph are | |
| 8 | * duplicated in all such forms and that any documentation, | |
| 9 | * advertising materials, and other materials related to such | |
| 10 | * distribution and use acknowledge that the software was developed | |
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11 | * by Mark Nudleman and the University of California, Berkeley. The |
| 12 | * name of Mark Nudleman or the | |
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13 | * University may not be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. | |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 18 | */ | |
| 19 | ||
| 20 | #ifndef lint | |
| 966c6ec0 | 21 | static char sccsid[] = "@(#)option.c 5.6 (Berkeley) %G%"; |
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22 | #endif /* not lint */ |
| 23 | ||
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24 | #include <stdio.h> |
| 25 | #include <less.h> | |
| 26 | ||
| 27 | int top_scroll; /* Repaint screen from top */ | |
| 28 | int bs_mode; /* How to process backspaces */ | |
| 29 | int caseless; /* Do "caseless" searches */ | |
| 30 | int cbufs = 10; /* Current number of buffers */ | |
| 31 | int linenums = 1; /* Use line numbers */ | |
| 32 | int quit_at_eof; | |
| 33 | int squeeze; /* Squeeze multiple blank lines into one */ | |
| 34 | int tabstop = 8; /* Tab settings */ | |
| 35 | int tagoption; | |
| 36 | int terseprompt; | |
| 37 | ||
| 38 | char *firstsearch; | |
| 39 | extern int sc_height; | |
| 40 | ||
| 41 | option(argc, argv) | |
| 42 | int argc; | |
| 43 | char **argv; | |
| bfe13c81 | 44 | { |
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45 | extern char *optarg; |
| 46 | extern int optind; | |
| 47 | static int sc_window_set = 0; | |
| 48 | int ch; | |
| 49 | char *p; | |
| 50 | ||
| 51 | optind = 1; /* called twice, re-init getopt. */ | |
| 52 | while ((ch = getopt(argc, argv, "0123456789/:ceinpst:ux:")) != EOF) | |
| 53 | switch((char)ch) { | |
| 54 | case '0': case '1': case '2': case '3': case '4': | |
| 55 | case '5': case '6': case '7': case '8': case '9': | |
| bfe13c81 | 56 | /* |
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57 | * kludge: more was originally designed to take |
| 58 | * a number after a dash. | |
| bfe13c81 | 59 | */ |
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60 | if (!sc_window_set) { |
| 61 | p = argv[optind - 1]; | |
| 62 | if (p[0] == '-' && p[1] == ch && !p[2]) | |
| 63 | sc_height = atoi(++p); | |
| 64 | else | |
| 65 | sc_height = atoi(argv[optind] + 1); | |
| 66 | sc_window_set = 1; | |
| bfe13c81 | 67 | } |
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68 | break; |
| 69 | case '/': | |
| 70 | firstsearch = optarg; | |
| 71 | break; | |
| 72 | case 'c': | |
| 73 | top_scroll = 1; | |
| 74 | break; | |
| 75 | case 'e': | |
| 76 | quit_at_eof = 1; | |
| 77 | break; | |
| 78 | case 'i': | |
| 79 | caseless = 1; | |
| 80 | break; | |
| 81 | case 'n': | |
| 82 | linenums = 0; | |
| 83 | break; | |
| 84 | case 'p': | |
| 85 | terseprompt = 1; | |
| 86 | break; | |
| 87 | case 's': | |
| 88 | squeeze = 1; | |
| 89 | break; | |
| 90 | case 't': | |
| 91 | tagoption = 1; | |
| 92 | findtag(optarg); | |
| 93 | break; | |
| 94 | case 'u': | |
| 95 | bs_mode = 1; | |
| 96 | break; | |
| 97 | case 'x': | |
| 98 | tabstop = atoi(optarg); | |
| 99 | if (tabstop <= 0) | |
| 100 | tabstop = 8; | |
| 101 | break; | |
| 102 | case '?': | |
| 103 | default: | |
| 104 | fprintf(stderr, | |
| 105 | "usage: less [-ceinpus] [-t tag] [-x tabs] [-/ pattern] [-#] [file ...]\n"); | |
| 106 | exit(1); | |
| 107 | } | |
| 108 | return(optind); | |
| bfe13c81 | 109 | } |