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Annotation of src/usr.bin/mandoc/manpath.c, Revision 1.3

1.3     ! schwarze    1: /*     $Id: manpath.c,v 1.2 2011/12/12 01:59:13 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:
1.3     ! schwarze   19: #include <sys/param.h>
        !            20:
1.1       schwarze   21: #include <assert.h>
                     22: #include <ctype.h>
                     23: #include <limits.h>
                     24: #include <stdio.h>
                     25: #include <stdlib.h>
                     26: #include <string.h>
                     27:
                     28: #include "mandoc.h"
                     29: #include "manpath.h"
                     30:
                     31: #define MAN_CONF_FILE  "/etc/man.conf"
                     32: #define MAN_CONF_KEY   "_whatdb"
                     33:
                     34: static void     manpath_add(struct manpaths *, const char *);
1.3     ! schwarze   35: static void     manpath_parseline(struct manpaths *, char *);
1.1       schwarze   36:
                     37: void
1.2       schwarze   38: manpath_parse(struct manpaths *dirs, const char *file,
                     39:                char *defp, char *auxp)
1.1       schwarze   40: {
                     41:
                     42:        manpath_parseline(dirs, auxp);
                     43:
                     44:        if (NULL == defp)
                     45:                defp = getenv("MANPATH");
                     46:
                     47:        if (NULL == defp)
1.3     ! schwarze   48:                manpath_manconf(dirs, file ? file : MAN_CONF_FILE);
1.1       schwarze   49:        else
                     50:                manpath_parseline(dirs, defp);
                     51: }
                     52:
                     53: /*
                     54:  * Parse a FULL pathname from a colon-separated list of arrays.
                     55:  */
1.3     ! schwarze   56: static void
1.1       schwarze   57: manpath_parseline(struct manpaths *dirs, char *path)
                     58: {
                     59:        char    *dir;
                     60:
                     61:        if (NULL == path)
                     62:                return;
                     63:
                     64:        for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
                     65:                manpath_add(dirs, dir);
                     66: }
                     67:
                     68: /*
                     69:  * Add a directory to the array, ignoring bad directories.
                     70:  * Grow the array one-by-one for simplicity's sake.
                     71:  */
                     72: static void
                     73: manpath_add(struct manpaths *dirs, const char *dir)
                     74: {
                     75:        char             buf[PATH_MAX];
                     76:        char            *cp;
                     77:        int              i;
                     78:
                     79:        if (NULL == (cp = realpath(dir, buf)))
                     80:                return;
                     81:
                     82:        for (i = 0; i < dirs->sz; i++)
                     83:                if (0 == strcmp(dirs->paths[i], dir))
                     84:                        return;
                     85:
                     86:        dirs->paths = mandoc_realloc
                     87:                (dirs->paths,
                     88:                 ((size_t)dirs->sz + 1) * sizeof(char *));
                     89:
                     90:        dirs->paths[dirs->sz++] = mandoc_strdup(cp);
                     91: }
                     92:
                     93: void
                     94: manpath_free(struct manpaths *p)
                     95: {
                     96:        int              i;
                     97:
                     98:        for (i = 0; i < p->sz; i++)
                     99:                free(p->paths[i]);
                    100:
                    101:        free(p->paths);
                    102: }
                    103:
                    104: void
1.2       schwarze  105: manpath_manconf(struct manpaths *dirs, const char *file)
1.1       schwarze  106: {
                    107:        FILE            *stream;
                    108:        char            *p, *q;
                    109:        size_t           len, keysz;
                    110:
                    111:        keysz = strlen(MAN_CONF_KEY);
                    112:        assert(keysz > 0);
                    113:
                    114:        if (NULL == (stream = fopen(file, "r")))
                    115:                return;
                    116:
                    117:        while (NULL != (p = fgetln(stream, &len))) {
                    118:                if (0 == len || '\n' != p[--len])
                    119:                        break;
                    120:                p[len] = '\0';
                    121:                while (isspace((unsigned char)*p))
                    122:                        p++;
                    123:                if (strncmp(MAN_CONF_KEY, p, keysz))
                    124:                        continue;
                    125:                p += keysz;
                    126:                while (isspace(*p))
                    127:                        p++;
                    128:                if ('\0' == *p)
                    129:                        continue;
                    130:                if (NULL == (q = strrchr(p, '/')))
                    131:                        continue;
                    132:                *q = '\0';
                    133:                manpath_add(dirs, p);
                    134:        }
                    135:
                    136:        fclose(stream);
                    137: }