1 /* $Id: manpath.c,v 1.15 2014/04/23 21:06:41 schwarze Exp $ */
3 * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
4 * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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.
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.
29 #include "mandoc_aux.h"
32 #define MAN_CONF_FILE "/etc/man.conf"
33 #define MAN_CONF_KEY "_whatdb"
35 static void manpath_add(struct manpaths *, const char *);
36 static void manpath_parseline(struct manpaths *, char *);
39 manpath_parse(struct manpaths *dirs, const char *file,
40 char *defp, char *auxp)
43 char cmd[(PATH_MAX * 3) + 20];
48 strlcpy(cmd, "manpath", sizeof(cmd));
50 strlcat(cmd, " -C ", sizeof(cmd));
51 strlcat(cmd, file, sizeof(cmd));
54 strlcat(cmd, " -m ", sizeof(cmd));
55 strlcat(cmd, auxp, sizeof(cmd));
58 strlcat(cmd, " -M ", sizeof(cmd));
59 strlcat(cmd, defp, sizeof(cmd));
62 /* Open manpath(1). Ignore errors. */
64 stream = popen(cmd, "r");
71 /* Read in as much output as we can. */
74 buf = mandoc_realloc(buf, bsz + 1024);
75 sz = fread(buf + bsz, 1, 1024, stream);
79 if ( ! ferror(stream) && feof(stream) &&
80 bsz && '\n' == buf[bsz - 1]) {
82 manpath_parseline(dirs, buf);
90 /* Always prepend -m. */
91 manpath_parseline(dirs, auxp);
93 /* If -M is given, it overrides everything else. */
95 manpath_parseline(dirs, defp);
99 /* MANPATH and man.conf(5) cooperate. */
100 defp = getenv("MANPATH");
102 file = MAN_CONF_FILE;
104 /* No MANPATH; use man.conf(5) only. */
105 if (NULL == defp || '\0' == defp[0]) {
106 manpath_manconf(dirs, file);
110 /* Prepend man.conf(5) to MANPATH. */
111 if (':' == defp[0]) {
112 manpath_manconf(dirs, file);
113 manpath_parseline(dirs, defp);
117 /* Append man.conf(5) to MANPATH. */
118 if (':' == defp[strlen(defp) - 1]) {
119 manpath_parseline(dirs, defp);
120 manpath_manconf(dirs, file);
124 /* Insert man.conf(5) into MANPATH. */
125 insert = strstr(defp, "::");
126 if (NULL != insert) {
128 manpath_parseline(dirs, defp);
129 manpath_manconf(dirs, file);
130 manpath_parseline(dirs, insert + 1);
134 /* MANPATH overrides man.conf(5) completely. */
135 manpath_parseline(dirs, defp);
140 * Parse a FULL pathname from a colon-separated list of arrays.
143 manpath_parseline(struct manpaths *dirs, char *path)
150 for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
151 manpath_add(dirs, dir);
155 * Add a directory to the array, ignoring bad directories.
156 * Grow the array one-by-one for simplicity's sake.
159 manpath_add(struct manpaths *dirs, const char *dir)
165 if (NULL == (cp = realpath(dir, buf)))
168 for (i = 0; i < dirs->sz; i++)
169 if (0 == strcmp(dirs->paths[i], dir))
172 dirs->paths = mandoc_reallocarray(dirs->paths,
173 dirs->sz + 1, sizeof(char *));
175 dirs->paths[dirs->sz++] = mandoc_strdup(cp);
179 manpath_free(struct manpaths *p)
183 for (i = 0; i < p->sz; i++)
190 manpath_manconf(struct manpaths *dirs, const char *file)
196 keysz = strlen(MAN_CONF_KEY);
199 if (NULL == (stream = fopen(file, "r")))
202 while (NULL != (p = fgetln(stream, &len))) {
203 if (0 == len || '\n' != p[--len])
206 while (isspace((unsigned char)*p))
208 if (strncmp(MAN_CONF_KEY, p, keysz))
211 while (isspace((unsigned char)*p))
215 if (NULL == (q = strrchr(p, '/')))
218 manpath_add(dirs, p);