Annotation of mandoc/manpath.c, Revision 1.20
1.20 ! schwarze 1: /* $Id: manpath.c,v 1.19 2014/11/27 00:30:40 schwarze Exp $ */
1.1 kristaps 2: /*
1.20 ! schwarze 3: * Copyright (c) 2011, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: #include "config.h"
1.16 schwarze 19:
20: #include <sys/types.h>
1.18 schwarze 21: #include <sys/stat.h>
1.1 kristaps 22:
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:
1.13 schwarze 30: #include "mandoc_aux.h"
1.1 kristaps 31: #include "manpath.h"
32:
33: #define MAN_CONF_FILE "/etc/man.conf"
34: #define MAN_CONF_KEY "_whatdb"
1.20 ! schwarze 35: #define MANPATH_DEFAULT "/usr/share/man:/usr/X11R6/man:/usr/local/man"
1.1 kristaps 36:
1.18 schwarze 37: static void manpath_add(struct manpaths *, const char *, int);
38: static void manpath_parseline(struct manpaths *, char *, int);
1.1 kristaps 39:
40: void
1.5 schwarze 41: manpath_parse(struct manpaths *dirs, const char *file,
42: char *defp, char *auxp)
1.1 kristaps 43: {
1.17 schwarze 44: #if HAVE_MANPATH
1.11 schwarze 45: char cmd[(PATH_MAX * 3) + 20];
1.6 kristaps 46: FILE *stream;
47: char *buf;
48: size_t sz, bsz;
49:
50: strlcpy(cmd, "manpath", sizeof(cmd));
51: if (file) {
52: strlcat(cmd, " -C ", sizeof(cmd));
53: strlcat(cmd, file, sizeof(cmd));
54: }
55: if (auxp) {
56: strlcat(cmd, " -m ", sizeof(cmd));
57: strlcat(cmd, auxp, sizeof(cmd));
58: }
59: if (defp) {
60: strlcat(cmd, " -M ", sizeof(cmd));
61: strlcat(cmd, defp, sizeof(cmd));
62: }
63:
64: /* Open manpath(1). Ignore errors. */
65:
66: stream = popen(cmd, "r");
67: if (NULL == stream)
68: return;
69:
70: buf = NULL;
71: bsz = 0;
72:
73: /* Read in as much output as we can. */
74:
75: do {
76: buf = mandoc_realloc(buf, bsz + 1024);
1.9 kristaps 77: sz = fread(buf + bsz, 1, 1024, stream);
1.6 kristaps 78: bsz += sz;
79: } while (sz > 0);
80:
81: if ( ! ferror(stream) && feof(stream) &&
82: bsz && '\n' == buf[bsz - 1]) {
83: buf[bsz - 1] = '\0';
1.19 schwarze 84: manpath_parseline(dirs, buf, 1);
1.6 kristaps 85: }
1.1 kristaps 86:
1.6 kristaps 87: free(buf);
88: pclose(stream);
89: #else
1.20 ! schwarze 90: char manpath_default[] = MANPATH_DEFAULT;
1.8 kristaps 91: char *insert;
1.4 schwarze 92:
1.8 kristaps 93: /* Always prepend -m. */
1.18 schwarze 94: manpath_parseline(dirs, auxp, 1);
1.10 schwarze 95:
1.8 kristaps 96: /* If -M is given, it overrides everything else. */
97: if (NULL != defp) {
1.18 schwarze 98: manpath_parseline(dirs, defp, 1);
1.8 kristaps 99: return;
100: }
1.1 kristaps 101:
1.8 kristaps 102: /* MANPATH and man.conf(5) cooperate. */
103: defp = getenv("MANPATH");
104: if (NULL == file)
105: file = MAN_CONF_FILE;
106:
107: /* No MANPATH; use man.conf(5) only. */
108: if (NULL == defp || '\0' == defp[0]) {
109: manpath_manconf(dirs, file);
1.20 ! schwarze 110: if (dirs->sz == 0)
! 111: manpath_parseline(dirs, manpath_default, 0);
1.8 kristaps 112: return;
113: }
114:
115: /* Prepend man.conf(5) to MANPATH. */
116: if (':' == defp[0]) {
117: manpath_manconf(dirs, file);
1.18 schwarze 118: manpath_parseline(dirs, defp, 0);
1.8 kristaps 119: return;
120: }
121:
122: /* Append man.conf(5) to MANPATH. */
1.9 kristaps 123: if (':' == defp[strlen(defp) - 1]) {
1.18 schwarze 124: manpath_parseline(dirs, defp, 0);
1.8 kristaps 125: manpath_manconf(dirs, file);
126: return;
127: }
128:
129: /* Insert man.conf(5) into MANPATH. */
130: insert = strstr(defp, "::");
131: if (NULL != insert) {
132: *insert++ = '\0';
1.18 schwarze 133: manpath_parseline(dirs, defp, 0);
1.8 kristaps 134: manpath_manconf(dirs, file);
1.18 schwarze 135: manpath_parseline(dirs, insert + 1, 0);
1.8 kristaps 136: return;
137: }
138:
139: /* MANPATH overrides man.conf(5) completely. */
1.18 schwarze 140: manpath_parseline(dirs, defp, 0);
1.6 kristaps 141: #endif
1.1 kristaps 142: }
143:
144: /*
145: * Parse a FULL pathname from a colon-separated list of arrays.
146: */
1.6 kristaps 147: static void
1.18 schwarze 148: manpath_parseline(struct manpaths *dirs, char *path, int complain)
1.1 kristaps 149: {
150: char *dir;
151:
152: if (NULL == path)
153: return;
154:
155: for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
1.18 schwarze 156: manpath_add(dirs, dir, complain);
1.1 kristaps 157: }
158:
159: /*
160: * Add a directory to the array, ignoring bad directories.
161: * Grow the array one-by-one for simplicity's sake.
162: */
163: static void
1.18 schwarze 164: manpath_add(struct manpaths *dirs, const char *dir, int complain)
1.1 kristaps 165: {
166: char buf[PATH_MAX];
1.18 schwarze 167: struct stat sb;
1.1 kristaps 168: char *cp;
1.9 kristaps 169: size_t i;
1.1 kristaps 170:
1.18 schwarze 171: if (NULL == (cp = realpath(dir, buf))) {
172: if (complain) {
173: fputs("manpath: ", stderr);
174: perror(dir);
175: }
1.1 kristaps 176: return;
1.18 schwarze 177: }
1.1 kristaps 178:
179: for (i = 0; i < dirs->sz; i++)
180: if (0 == strcmp(dirs->paths[i], dir))
181: return;
182:
1.18 schwarze 183: if (stat(cp, &sb) == -1) {
184: if (complain) {
185: fputs("manpath: ", stderr);
186: perror(dir);
187: }
188: return;
189: }
190:
1.15 schwarze 191: dirs->paths = mandoc_reallocarray(dirs->paths,
192: dirs->sz + 1, sizeof(char *));
1.1 kristaps 193:
194: dirs->paths[dirs->sz++] = mandoc_strdup(cp);
1.2 kristaps 195: }
196:
197: void
198: manpath_free(struct manpaths *p)
199: {
1.9 kristaps 200: size_t i;
1.2 kristaps 201:
202: for (i = 0; i < p->sz; i++)
203: free(p->paths[i]);
204:
205: free(p->paths);
206: }
207:
208: void
1.5 schwarze 209: manpath_manconf(struct manpaths *dirs, const char *file)
1.2 kristaps 210: {
211: FILE *stream;
1.1 kristaps 212: char *p, *q;
1.4 schwarze 213: size_t len, keysz;
1.1 kristaps 214:
215: keysz = strlen(MAN_CONF_KEY);
216: assert(keysz > 0);
217:
1.3 kristaps 218: if (NULL == (stream = fopen(file, "r")))
1.1 kristaps 219: return;
220:
221: while (NULL != (p = fgetln(stream, &len))) {
222: if (0 == len || '\n' != p[--len])
223: break;
224: p[len] = '\0';
225: while (isspace((unsigned char)*p))
226: p++;
227: if (strncmp(MAN_CONF_KEY, p, keysz))
228: continue;
229: p += keysz;
1.12 schwarze 230: while (isspace((unsigned char)*p))
1.1 kristaps 231: p++;
232: if ('\0' == *p)
233: continue;
234: if (NULL == (q = strrchr(p, '/')))
235: continue;
236: *q = '\0';
1.18 schwarze 237: manpath_add(dirs, p, 0);
1.1 kristaps 238: }
239:
240: fclose(stream);
241: }
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