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Annotation of mandoc/manpath.c, Revision 1.4

1.4     ! schwarze    1: /*     $Id: manpath.c,v 1.3 2011/11/24 10:44:56 kristaps Exp $ */
1.1       kristaps    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: #ifdef HAVE_CONFIG_H
                     19: #include "config.h"
                     20: #endif
                     21:
1.4     ! schwarze   22: #include <sys/types.h>
1.1       kristaps   23: #include <assert.h>
                     24: #include <ctype.h>
                     25: #include <limits.h>
                     26: #include <stdio.h>
                     27: #include <stdlib.h>
                     28: #include <string.h>
                     29:
                     30: #include "mandoc.h"
                     31: #include "manpath.h"
                     32:
                     33: #define MAN_CONF_FILE  "/etc/man.conf"
                     34: #define MAN_CONF_KEY   "_whatdb"
                     35:
                     36: static void     manpath_add(struct manpaths *, const char *);
                     37:
                     38: void
1.4     ! schwarze   39: manpath_parse(struct manpaths *dirs, char *defp, char *auxp)
1.1       kristaps   40: {
                     41:
1.4     ! schwarze   42:        manpath_parseline(dirs, auxp);
        !            43:
        !            44:        if (NULL == defp)
1.1       kristaps   45:                defp = getenv("MANPATH");
                     46:
                     47:        if (NULL == defp)
                     48:                manpath_parseconf(dirs);
                     49:        else
                     50:                manpath_parseline(dirs, defp);
                     51: }
                     52:
                     53: /*
                     54:  * Parse a FULL pathname from a colon-separated list of arrays.
                     55:  */
                     56: void
1.4     ! schwarze   57: manpath_parseline(struct manpaths *dirs, char *path)
1.1       kristaps   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
1.4     ! schwarze   73: manpath_add(struct manpaths *dirs, const char *dir)
1.1       kristaps   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
1.4     ! schwarze   87:                (dirs->paths,
1.1       kristaps   88:                 ((size_t)dirs->sz + 1) * sizeof(char *));
                     89:
                     90:        dirs->paths[dirs->sz++] = mandoc_strdup(cp);
                     91: }
                     92:
                     93: void
                     94: manpath_parseconf(struct manpaths *dirs)
                     95: {
1.2       kristaps   96: #ifdef USE_MANPATH
1.1       kristaps   97:        FILE            *stream;
                     98:        char            *buf;
                     99:        size_t           sz, bsz;
                    100:
                    101:        /* Open manpath(1).  Ignore errors. */
                    102:
                    103:        stream = popen("manpath", "r");
                    104:        if (NULL == stream)
                    105:                return;
                    106:
                    107:        buf = NULL;
                    108:        bsz = 0;
                    109:
                    110:        /* Read in as much output as we can. */
                    111:
                    112:        do {
                    113:                buf = mandoc_realloc(buf, bsz + 1024);
                    114:                sz = fread(buf + (int)bsz, 1, 1024, stream);
                    115:                bsz += sz;
                    116:        } while (sz > 0);
                    117:
                    118:        if ( ! ferror(stream) && feof(stream) &&
                    119:                        bsz && '\n' == buf[bsz - 1]) {
                    120:                buf[bsz - 1] = '\0';
                    121:                manpath_parseline(dirs, buf);
                    122:        }
                    123:
                    124:        free(buf);
                    125:        pclose(stream);
                    126: #else
1.3       kristaps  127:        manpath_manconf(MAN_CONF_FILE, dirs);
1.2       kristaps  128: #endif
                    129: }
                    130:
                    131: void
                    132: manpath_free(struct manpaths *p)
                    133: {
                    134:        int              i;
                    135:
                    136:        for (i = 0; i < p->sz; i++)
                    137:                free(p->paths[i]);
                    138:
                    139:        free(p->paths);
                    140: }
                    141:
                    142: void
1.3       kristaps  143: manpath_manconf(const char *file, struct manpaths *dirs)
1.2       kristaps  144: {
                    145:        FILE            *stream;
1.1       kristaps  146:        char            *p, *q;
1.4     ! schwarze  147:        size_t           len, keysz;
1.1       kristaps  148:
                    149:        keysz = strlen(MAN_CONF_KEY);
                    150:        assert(keysz > 0);
                    151:
1.3       kristaps  152:        if (NULL == (stream = fopen(file, "r")))
1.1       kristaps  153:                return;
                    154:
                    155:        while (NULL != (p = fgetln(stream, &len))) {
                    156:                if (0 == len || '\n' != p[--len])
                    157:                        break;
                    158:                p[len] = '\0';
                    159:                while (isspace((unsigned char)*p))
                    160:                        p++;
                    161:                if (strncmp(MAN_CONF_KEY, p, keysz))
                    162:                        continue;
                    163:                p += keysz;
                    164:                while (isspace(*p))
                    165:                        p++;
                    166:                if ('\0' == *p)
                    167:                        continue;
                    168:                if (NULL == (q = strrchr(p, '/')))
                    169:                        continue;
                    170:                *q = '\0';
                    171:                manpath_add(dirs, p);
                    172:        }
                    173:
                    174:        fclose(stream);
                    175: }

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