Annotation of mandoc/manpath.c, Revision 1.10
1.10 ! schwarze 1: /* $Id: manpath.c,v 1.9 2012/06/08 10:32:40 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:
1.10 ! schwarze 22: #ifdef USE_MANPATH
1.6 kristaps 23: #include <sys/param.h>
1.10 ! schwarze 24: #endif
1.6 kristaps 25:
1.1 kristaps 26: #include <assert.h>
27: #include <ctype.h>
28: #include <limits.h>
29: #include <stdio.h>
30: #include <stdlib.h>
31: #include <string.h>
32:
33: #include "mandoc.h"
34: #include "manpath.h"
35:
36: #define MAN_CONF_FILE "/etc/man.conf"
37: #define MAN_CONF_KEY "_whatdb"
38:
39: static void manpath_add(struct manpaths *, const char *);
1.6 kristaps 40: static void manpath_parseline(struct manpaths *, char *);
1.1 kristaps 41:
42: void
1.5 schwarze 43: manpath_parse(struct manpaths *dirs, const char *file,
44: char *defp, char *auxp)
1.1 kristaps 45: {
1.6 kristaps 46: #ifdef USE_MANPATH
47: char cmd[(MAXPATHLEN * 3) + 20];
48: FILE *stream;
49: char *buf;
50: size_t sz, bsz;
51:
52: strlcpy(cmd, "manpath", sizeof(cmd));
53: if (file) {
54: strlcat(cmd, " -C ", sizeof(cmd));
55: strlcat(cmd, file, sizeof(cmd));
56: }
57: if (auxp) {
58: strlcat(cmd, " -m ", sizeof(cmd));
59: strlcat(cmd, auxp, sizeof(cmd));
60: }
61: if (defp) {
62: strlcat(cmd, " -M ", sizeof(cmd));
63: strlcat(cmd, defp, sizeof(cmd));
64: }
65:
66: /* Open manpath(1). Ignore errors. */
67:
68: stream = popen(cmd, "r");
69: if (NULL == stream)
70: return;
71:
72: buf = NULL;
73: bsz = 0;
74:
75: /* Read in as much output as we can. */
76:
77: do {
78: buf = mandoc_realloc(buf, bsz + 1024);
1.9 kristaps 79: sz = fread(buf + bsz, 1, 1024, stream);
1.6 kristaps 80: bsz += sz;
81: } while (sz > 0);
82:
83: if ( ! ferror(stream) && feof(stream) &&
84: bsz && '\n' == buf[bsz - 1]) {
85: buf[bsz - 1] = '\0';
86: manpath_parseline(dirs, buf);
87: }
1.1 kristaps 88:
1.6 kristaps 89: free(buf);
90: pclose(stream);
91: #else
1.8 kristaps 92: char *insert;
1.4 schwarze 93:
1.8 kristaps 94: /* Always prepend -m. */
1.10 ! schwarze 95: manpath_parseline(dirs, auxp);
! 96:
1.8 kristaps 97: /* If -M is given, it overrides everything else. */
98: if (NULL != defp) {
99: manpath_parseline(dirs, defp);
100: return;
101: }
1.1 kristaps 102:
1.8 kristaps 103: /* MANPATH and man.conf(5) cooperate. */
104: defp = getenv("MANPATH");
105: if (NULL == file)
106: file = MAN_CONF_FILE;
107:
108: /* No MANPATH; use man.conf(5) only. */
109: if (NULL == defp || '\0' == defp[0]) {
110: manpath_manconf(dirs, file);
111: return;
112: }
113:
114: /* Prepend man.conf(5) to MANPATH. */
115: if (':' == defp[0]) {
116: manpath_manconf(dirs, file);
1.1 kristaps 117: manpath_parseline(dirs, defp);
1.8 kristaps 118: return;
119: }
120:
121: /* Append man.conf(5) to MANPATH. */
1.9 kristaps 122: if (':' == defp[strlen(defp) - 1]) {
1.8 kristaps 123: manpath_parseline(dirs, defp);
124: manpath_manconf(dirs, file);
125: return;
126: }
127:
128: /* Insert man.conf(5) into MANPATH. */
129: insert = strstr(defp, "::");
130: if (NULL != insert) {
131: *insert++ = '\0';
132: manpath_parseline(dirs, defp);
133: manpath_manconf(dirs, file);
134: manpath_parseline(dirs, insert + 1);
135: return;
136: }
137:
138: /* MANPATH overrides man.conf(5) completely. */
139: manpath_parseline(dirs, defp);
1.6 kristaps 140: #endif
1.1 kristaps 141: }
142:
143: /*
144: * Parse a FULL pathname from a colon-separated list of arrays.
145: */
1.6 kristaps 146: static void
1.4 schwarze 147: manpath_parseline(struct manpaths *dirs, char *path)
1.1 kristaps 148: {
149: char *dir;
150:
151: if (NULL == path)
152: return;
153:
154: for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
155: manpath_add(dirs, dir);
156: }
157:
158: /*
159: * Add a directory to the array, ignoring bad directories.
160: * Grow the array one-by-one for simplicity's sake.
161: */
162: static void
1.4 schwarze 163: manpath_add(struct manpaths *dirs, const char *dir)
1.1 kristaps 164: {
165: char buf[PATH_MAX];
166: char *cp;
1.9 kristaps 167: size_t i;
1.1 kristaps 168:
169: if (NULL == (cp = realpath(dir, buf)))
170: return;
171:
172: for (i = 0; i < dirs->sz; i++)
173: if (0 == strcmp(dirs->paths[i], dir))
174: return;
175:
176: dirs->paths = mandoc_realloc
1.4 schwarze 177: (dirs->paths,
1.9 kristaps 178: (dirs->sz + 1) * sizeof(char *));
1.1 kristaps 179:
180: dirs->paths[dirs->sz++] = mandoc_strdup(cp);
1.2 kristaps 181: }
182:
183: void
184: manpath_free(struct manpaths *p)
185: {
1.9 kristaps 186: size_t i;
1.2 kristaps 187:
188: for (i = 0; i < p->sz; i++)
189: free(p->paths[i]);
190:
191: free(p->paths);
192: }
193:
194: void
1.5 schwarze 195: manpath_manconf(struct manpaths *dirs, const char *file)
1.2 kristaps 196: {
197: FILE *stream;
1.1 kristaps 198: char *p, *q;
1.4 schwarze 199: size_t len, keysz;
1.1 kristaps 200:
201: keysz = strlen(MAN_CONF_KEY);
202: assert(keysz > 0);
203:
1.3 kristaps 204: if (NULL == (stream = fopen(file, "r")))
1.1 kristaps 205: return;
206:
207: while (NULL != (p = fgetln(stream, &len))) {
208: if (0 == len || '\n' != p[--len])
209: break;
210: p[len] = '\0';
211: while (isspace((unsigned char)*p))
212: p++;
213: if (strncmp(MAN_CONF_KEY, p, keysz))
214: continue;
215: p += keysz;
216: while (isspace(*p))
217: p++;
218: if ('\0' == *p)
219: continue;
220: if (NULL == (q = strrchr(p, '/')))
221: continue;
222: *q = '\0';
223: manpath_add(dirs, p);
224: }
225:
226: fclose(stream);
227: }
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