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Annotation of 43BSDReno/usr.bin/man/apropos/apropos.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: char copyright[] =
        !            22: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
        !            23:  All rights reserved.\n";
        !            24: #endif /* not lint */
        !            25: 
        !            26: #ifndef lint
        !            27: static char sccsid[] = "@(#)apropos.c  5.12 (Berkeley) 6/1/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: #include <sys/param.h>
        !            31: #include <stdio.h>
        !            32: #include <ctype.h>
        !            33: #include <string.h>
        !            34: #include <stdlib.h>
        !            35: #include "../man/pathnames.h"
        !            36: 
        !            37: #define        MAXLINELEN      256                     /* max line handled */
        !            38: 
        !            39: char *progname;
        !            40: 
        !            41: static int *found, foundman;
        !            42: 
        !            43: main(argc, argv)
        !            44:        int argc;
        !            45:        char **argv;
        !            46: {
        !            47:        extern char *optarg;
        !            48:        extern int optind;
        !            49:        register char **p;
        !            50:        int ch;
        !            51:        char *p_augment, *p_path, **getdb();
        !            52: 
        !            53:        progname = "apropos";
        !            54:        p_augment = p_path = NULL;
        !            55:        while ((ch = getopt(argc, argv, "M:m:P:")) != EOF)
        !            56:                switch((char)ch) {
        !            57:                case 'M':
        !            58:                case 'P':               /* backward compatible */
        !            59:                        p_path = optarg;
        !            60:                        break;
        !            61:                case 'm':
        !            62:                        p_augment = optarg;
        !            63:                        break;
        !            64:                case '?':
        !            65:                default:
        !            66:                        usage();
        !            67:                }
        !            68:        argv += optind;
        !            69:        argc -= optind;
        !            70: 
        !            71:        if (argc < 1)
        !            72:                usage();
        !            73: 
        !            74:        /*NOSTRICT*/
        !            75:        if (!(found = (int *)malloc((u_int)argc)))
        !            76:                enomem();
        !            77:        bzero((void *)found, argc * sizeof(int));
        !            78: 
        !            79:        for (p = argv; *p; ++p)                 /* convert to lower-case */
        !            80:                lowstr(*p, *p);
        !            81: 
        !            82:        if (p_augment)
        !            83:                apropos(argv, p_augment, 1);
        !            84:        if (p_path || (p_path = getenv("MANPATH")))
        !            85:                apropos(argv, p_path, 1);
        !            86:        else
        !            87:                for (p = getdb(); *p; ++p)
        !            88:                        apropos(argv, *p, 0);
        !            89: 
        !            90:        if (!foundman) {
        !            91:                (void)fprintf(stderr,
        !            92:                    "apropos: : no %s file found.\n", _PATH_WHATIS);
        !            93:                exit(1);
        !            94:        }
        !            95:        for (p = argv; *p; ++p)
        !            96:                if (!found[p - argv])
        !            97:                        (void)printf("%s: nothing appropriate\n", *p);
        !            98: }
        !            99: 
        !           100: apropos(argv, path, buildpath)
        !           101:        char **argv, *path;
        !           102:        int buildpath;
        !           103: {
        !           104:        register char *end, *name, **p;
        !           105:        char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
        !           106: 
        !           107:        for (name = path; name; name = end) {   /* through name list */
        !           108:                if (end = index(name, ':'))
        !           109:                        *end++ = '\0';
        !           110: 
        !           111:                if (buildpath) {
        !           112:                        char hold[MAXPATHLEN + 1];
        !           113: 
        !           114:                        (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS);
        !           115:                        name = hold;
        !           116:                }
        !           117: 
        !           118:                if (!freopen(name, "r", stdin))
        !           119:                        continue;
        !           120: 
        !           121:                foundman = 1;
        !           122: 
        !           123:                /* for each file found */
        !           124:                while (fgets(buf, sizeof(buf), stdin)) {
        !           125:                        if (!index(buf, '\n')) {
        !           126:                                (void)fprintf(stderr,
        !           127:                                    "apropos: %s line too long.\n", name);
        !           128:                                exit(1);
        !           129:                        }
        !           130:                        lowstr(buf, wbuf);
        !           131:                        for (p = argv; *p; ++p)
        !           132:                                if (match(wbuf, *p)) {
        !           133:                                        (void)printf("%s", buf);
        !           134:                                        found[p - argv] = 1;
        !           135: 
        !           136:                                        /* only print line once */
        !           137:                                        while (*++p)
        !           138:                                                if (match(wbuf, *p))
        !           139:                                                        found[p - argv] = 1;
        !           140:                                        break;
        !           141:                                }
        !           142:                }
        !           143:        }
        !           144: }
        !           145: 
        !           146: /*
        !           147:  * match --
        !           148:  *     match anywhere the string appears
        !           149:  */
        !           150: match(bp, str)
        !           151:        register char *bp, *str;
        !           152: {
        !           153:        register int len;
        !           154:        register char test;
        !           155: 
        !           156:        if (!*bp)
        !           157:                return(0);
        !           158:        /* backward compatible: everything matches empty string */
        !           159:        if (!*str)
        !           160:                return(1);
        !           161:        for (test = *str++, len = strlen(str); *bp;)
        !           162:                if (test == *bp++ && !strncmp(bp, str, len))
        !           163:                        return(1);
        !           164:        return(0);
        !           165: }
        !           166: 
        !           167: /*
        !           168:  * lowstr --
        !           169:  *     convert a string to lower case
        !           170:  */
        !           171: lowstr(from, to)
        !           172:        register char *from, *to;
        !           173: {
        !           174:        register char ch;
        !           175: 
        !           176:        while ((ch = *from++) && ch != '\n')
        !           177:                *to++ = isupper(ch) ? tolower(ch) : ch;
        !           178:        *to = '\0';
        !           179: }
        !           180: 
        !           181: /*
        !           182:  * usage --
        !           183:  *     print usage message and die
        !           184:  */
        !           185: usage()
        !           186: {
        !           187:        (void)fprintf(stderr,
        !           188:            "usage: apropos [-M path] [-m path] keyword ...\n");
        !           189:        exit(1);
        !           190: }

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