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Annotation of src/usr.bin/mandoc/manpath.c, Revision 1.2

1.2     ! schwarze    1: /*     $Id: manpath.c,v 1.1 2011/11/26 16:41:35 schwarze Exp $ */
1.1       schwarze    2: /*
                      3:  * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
                      4:  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18:
                     19: #include <sys/types.h>
                     20: #include <assert.h>
                     21: #include <ctype.h>
                     22: #include <limits.h>
                     23: #include <stdio.h>
                     24: #include <stdlib.h>
                     25: #include <string.h>
                     26:
                     27: #include "mandoc.h"
                     28: #include "manpath.h"
                     29:
                     30: #define MAN_CONF_FILE  "/etc/man.conf"
                     31: #define MAN_CONF_KEY   "_whatdb"
                     32:
                     33: static void     manpath_add(struct manpaths *, const char *);
                     34:
                     35: void
1.2     ! schwarze   36: manpath_parse(struct manpaths *dirs, const char *file,
        !            37:                char *defp, char *auxp)
1.1       schwarze   38: {
                     39:
                     40:        manpath_parseline(dirs, auxp);
                     41:
                     42:        if (NULL == defp)
                     43:                defp = getenv("MANPATH");
                     44:
                     45:        if (NULL == defp)
1.2     ! schwarze   46:                manpath_parseconf(dirs, file);
1.1       schwarze   47:        else
                     48:                manpath_parseline(dirs, defp);
                     49: }
                     50:
                     51: /*
                     52:  * Parse a FULL pathname from a colon-separated list of arrays.
                     53:  */
                     54: void
                     55: manpath_parseline(struct manpaths *dirs, char *path)
                     56: {
                     57:        char    *dir;
                     58:
                     59:        if (NULL == path)
                     60:                return;
                     61:
                     62:        for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
                     63:                manpath_add(dirs, dir);
                     64: }
                     65:
                     66: /*
                     67:  * Add a directory to the array, ignoring bad directories.
                     68:  * Grow the array one-by-one for simplicity's sake.
                     69:  */
                     70: static void
                     71: manpath_add(struct manpaths *dirs, const char *dir)
                     72: {
                     73:        char             buf[PATH_MAX];
                     74:        char            *cp;
                     75:        int              i;
                     76:
                     77:        if (NULL == (cp = realpath(dir, buf)))
                     78:                return;
                     79:
                     80:        for (i = 0; i < dirs->sz; i++)
                     81:                if (0 == strcmp(dirs->paths[i], dir))
                     82:                        return;
                     83:
                     84:        dirs->paths = mandoc_realloc
                     85:                (dirs->paths,
                     86:                 ((size_t)dirs->sz + 1) * sizeof(char *));
                     87:
                     88:        dirs->paths[dirs->sz++] = mandoc_strdup(cp);
                     89: }
                     90:
                     91: void
1.2     ! schwarze   92: manpath_parseconf(struct manpaths *dirs, const char *file)
1.1       schwarze   93: {
                     94:
1.2     ! schwarze   95:        manpath_manconf(dirs, file ? file : MAN_CONF_FILE);
1.1       schwarze   96: }
                     97:
                     98: void
                     99: manpath_free(struct manpaths *p)
                    100: {
                    101:        int              i;
                    102:
                    103:        for (i = 0; i < p->sz; i++)
                    104:                free(p->paths[i]);
                    105:
                    106:        free(p->paths);
                    107: }
                    108:
                    109: void
1.2     ! schwarze  110: manpath_manconf(struct manpaths *dirs, const char *file)
1.1       schwarze  111: {
                    112:        FILE            *stream;
                    113:        char            *p, *q;
                    114:        size_t           len, keysz;
                    115:
                    116:        keysz = strlen(MAN_CONF_KEY);
                    117:        assert(keysz > 0);
                    118:
                    119:        if (NULL == (stream = fopen(file, "r")))
                    120:                return;
                    121:
                    122:        while (NULL != (p = fgetln(stream, &len))) {
                    123:                if (0 == len || '\n' != p[--len])
                    124:                        break;
                    125:                p[len] = '\0';
                    126:                while (isspace((unsigned char)*p))
                    127:                        p++;
                    128:                if (strncmp(MAN_CONF_KEY, p, keysz))
                    129:                        continue;
                    130:                p += keysz;
                    131:                while (isspace(*p))
                    132:                        p++;
                    133:                if ('\0' == *p)
                    134:                        continue;
                    135:                if (NULL == (q = strrchr(p, '/')))
                    136:                        continue;
                    137:                *q = '\0';
                    138:                manpath_add(dirs, p);
                    139:        }
                    140:
                    141:        fclose(stream);
                    142: }