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Annotation of 43BSDReno/usr.bin/man/whatis/whatis.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
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may 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 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[] = "@(#)whatis.c   5.6 (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 *beg, **p;
        !            50:        int ch;
        !            51:        char *p_augment, *p_path, **getdb();
        !            52: 
        !            53:        progname = "whatis";
        !            54:        while ((ch = getopt(argc, argv, "M:m:P:")) != EOF)
        !            55:                switch((char)ch) {
        !            56:                case 'M':
        !            57:                case 'P':               /* backward compatible */
        !            58:                        p_path = optarg;
        !            59:                        break;
        !            60:                case 'm':
        !            61:                        p_augment = optarg;
        !            62:                        break;
        !            63:                case '?':
        !            64:                default:
        !            65:                        usage();
        !            66:                }
        !            67:        argv += optind;
        !            68:        argc -= optind;
        !            69: 
        !            70:        if (argc < 1)
        !            71:                usage();
        !            72: 
        !            73:        /*NOSTRICT*/
        !            74:        if (!(found = (int *)malloc((u_int)argc)))
        !            75:                enomem();
        !            76:        bzero((char *)found, argc * sizeof(int));
        !            77: 
        !            78:        for (p = argv; *p; ++p)                 /* trim full paths */
        !            79:                if (beg = rindex(*p, '/'))
        !            80:                        *p = beg + 1;
        !            81: 
        !            82:        if (p_augment)
        !            83:                whatis(argv, p_augment, 1);
        !            84:        if (p_path || (p_path = getenv("MANPATH")))
        !            85:                whatis(argv, p_path, 1);
        !            86:        else
        !            87:                for (p = getdb(); *p; ++p)
        !            88:                        whatis(argv, *p, 0);
        !            89: 
        !            90:        if (!foundman) {
        !            91:                fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS);
        !            92:                exit(1);
        !            93:        }
        !            94:        for (p = argv; *p; ++p)
        !            95:                if (!found[p - argv])
        !            96:                        printf("%s: not found\n", *p);
        !            97: }
        !            98: 
        !            99: whatis(argv, path, buildpath)
        !           100:        char **argv, *path;
        !           101:        int buildpath;
        !           102: {
        !           103:        register char *end, *name, **p;
        !           104:        char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
        !           105: 
        !           106:        for (name = path; name; name = end) {   /* through name list */
        !           107:                if (end = index(name, ':'))
        !           108:                        *end++ = '\0';
        !           109: 
        !           110:                if (buildpath) {
        !           111:                        char hold[MAXPATHLEN + 1];
        !           112: 
        !           113:                        (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS);
        !           114:                        name = hold;
        !           115:                }
        !           116: 
        !           117:                if (!freopen(name, "r", stdin))
        !           118:                        continue;
        !           119: 
        !           120:                foundman = 1;
        !           121: 
        !           122:                /* for each file found */
        !           123:                while (fgets(buf, sizeof(buf), stdin)) {
        !           124:                        dashtrunc(buf, wbuf);
        !           125:                        for (p = argv; *p; ++p)
        !           126:                                if (match(wbuf, *p)) {
        !           127:                                        printf("%s", buf);
        !           128:                                        found[p - argv] = 1;
        !           129: 
        !           130:                                        /* only print line once */
        !           131:                                        while (*++p)
        !           132:                                                if (match(wbuf, *p))
        !           133:                                                        found[p - argv] = 1;
        !           134:                                        break;
        !           135:                                }
        !           136:                }
        !           137:        }
        !           138: }
        !           139: 
        !           140: /*
        !           141:  * match --
        !           142:  *     match a full word
        !           143:  */
        !           144: match(bp, str)
        !           145:        register char *bp, *str;
        !           146: {
        !           147:        register int len;
        !           148:        register char *start;
        !           149: 
        !           150:        if (!*str || !*bp)
        !           151:                return(0);
        !           152:        for (len = strlen(str);;) {
        !           153:                for (; *bp && !isdigit(*bp) && !isalpha(*bp); ++bp);
        !           154:                if (!*bp)
        !           155:                        break;
        !           156:                for (start = bp++;
        !           157:                    *bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp);
        !           158:                if (bp - start == len && !strncasecmp(start, str, len))
        !           159:                        return(1);
        !           160:        }
        !           161:        return(0);
        !           162: }
        !           163: 
        !           164: /*
        !           165:  * dashtrunc --
        !           166:  *     truncate a string at " - "
        !           167:  */
        !           168: dashtrunc(from, to)
        !           169:        register char *from, *to;
        !           170: {
        !           171:        register int ch;
        !           172: 
        !           173:        for (; (ch = *from) && ch != '\n' &&
        !           174:            (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from)
        !           175:                *to++ = ch;
        !           176:        *to = '\0';
        !           177: }
        !           178: 
        !           179: /*
        !           180:  * usage --
        !           181:  *     print usage message and die
        !           182:  */
        !           183: usage()
        !           184: {
        !           185:        (void)fprintf(stderr,
        !           186:            "usage: whatis [-M path] [-m path] command ...\n");
        !           187:        exit(1);
        !           188: }

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