1 /* $Id: manpath.c,v 1.19 2014/11/27 00:30:40 schwarze Exp $ */
3 * Copyright (c) 2011, 2014 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.
20 #include <sys/types.h>
30 #include "mandoc_aux.h"
33 #define MAN_CONF_FILE "/etc/man.conf"
34 #define MAN_CONF_KEY "_whatdb"
36 static void manpath_add(struct manpaths *, const char *, int);
37 static void manpath_parseline(struct manpaths *, char *, int);
40 manpath_parse(struct manpaths *dirs, const char *file,
41 char *defp, char *auxp)
44 char cmd[(PATH_MAX * 3) + 20];
49 strlcpy(cmd, "manpath", sizeof(cmd));
51 strlcat(cmd, " -C ", sizeof(cmd));
52 strlcat(cmd, file, sizeof(cmd));
55 strlcat(cmd, " -m ", sizeof(cmd));
56 strlcat(cmd, auxp, sizeof(cmd));
59 strlcat(cmd, " -M ", sizeof(cmd));
60 strlcat(cmd, defp, sizeof(cmd));
63 /* Open manpath(1). Ignore errors. */
65 stream = popen(cmd, "r");
72 /* Read in as much output as we can. */
75 buf = mandoc_realloc(buf, bsz + 1024);
76 sz = fread(buf + bsz, 1, 1024, stream);
80 if ( ! ferror(stream) && feof(stream) &&
81 bsz && '\n' == buf[bsz - 1]) {
83 manpath_parseline(dirs, buf, 1);
91 /* Always prepend -m. */
92 manpath_parseline(dirs, auxp, 1);
94 /* If -M is given, it overrides everything else. */
96 manpath_parseline(dirs, defp, 1);
100 /* MANPATH and man.conf(5) cooperate. */
101 defp = getenv("MANPATH");
103 file = MAN_CONF_FILE;
105 /* No MANPATH; use man.conf(5) only. */
106 if (NULL == defp || '\0' == defp[0]) {
107 manpath_manconf(dirs, file);
111 /* Prepend man.conf(5) to MANPATH. */
112 if (':' == defp[0]) {
113 manpath_manconf(dirs, file);
114 manpath_parseline(dirs, defp, 0);
118 /* Append man.conf(5) to MANPATH. */
119 if (':' == defp[strlen(defp) - 1]) {
120 manpath_parseline(dirs, defp, 0);
121 manpath_manconf(dirs, file);
125 /* Insert man.conf(5) into MANPATH. */
126 insert = strstr(defp, "::");
127 if (NULL != insert) {
129 manpath_parseline(dirs, defp, 0);
130 manpath_manconf(dirs, file);
131 manpath_parseline(dirs, insert + 1, 0);
135 /* MANPATH overrides man.conf(5) completely. */
136 manpath_parseline(dirs, defp, 0);
141 * Parse a FULL pathname from a colon-separated list of arrays.
144 manpath_parseline(struct manpaths *dirs, char *path, int complain)
151 for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
152 manpath_add(dirs, dir, complain);
156 * Add a directory to the array, ignoring bad directories.
157 * Grow the array one-by-one for simplicity's sake.
160 manpath_add(struct manpaths *dirs, const char *dir, int complain)
167 if (NULL == (cp = realpath(dir, buf))) {
169 fputs("manpath: ", stderr);
175 for (i = 0; i < dirs->sz; i++)
176 if (0 == strcmp(dirs->paths[i], dir))
179 if (stat(cp, &sb) == -1) {
181 fputs("manpath: ", stderr);
187 dirs->paths = mandoc_reallocarray(dirs->paths,
188 dirs->sz + 1, sizeof(char *));
190 dirs->paths[dirs->sz++] = mandoc_strdup(cp);
194 manpath_free(struct manpaths *p)
198 for (i = 0; i < p->sz; i++)
205 manpath_manconf(struct manpaths *dirs, const char *file)
211 keysz = strlen(MAN_CONF_KEY);
214 if (NULL == (stream = fopen(file, "r")))
217 while (NULL != (p = fgetln(stream, &len))) {
218 if (0 == len || '\n' != p[--len])
221 while (isspace((unsigned char)*p))
223 if (strncmp(MAN_CONF_KEY, p, keysz))
226 while (isspace((unsigned char)*p))
230 if (NULL == (q = strrchr(p, '/')))
233 manpath_add(dirs, p, 0);