Annotation of src/usr.bin/mandoc/manpath.c, Revision 1.5
1.5 ! deraadt 1: /* $Id: manpath.c,v 1.4 2011/12/24 21:51:40 schwarze Exp $ */
1.1 schwarze 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: */
1.3 schwarze 18:
1.1 schwarze 19: #include <assert.h>
20: #include <ctype.h>
21: #include <limits.h>
22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
26: #include "mandoc.h"
27: #include "manpath.h"
28:
29: #define MAN_CONF_FILE "/etc/man.conf"
30: #define MAN_CONF_KEY "_whatdb"
31:
32: static void manpath_add(struct manpaths *, const char *);
1.3 schwarze 33: static void manpath_parseline(struct manpaths *, char *);
1.1 schwarze 34:
35: void
1.2 schwarze 36: manpath_parse(struct manpaths *dirs, const char *file,
37: char *defp, char *auxp)
1.1 schwarze 38: {
1.4 schwarze 39: char *insert;
1.1 schwarze 40:
1.4 schwarze 41: /* Always prepend -m. */
1.1 schwarze 42: manpath_parseline(dirs, auxp);
43:
1.4 schwarze 44: /* If -M is given, it overrides everything else. */
45: if (NULL != defp) {
46: manpath_parseline(dirs, defp);
47: return;
48: }
49:
50: /* MANPATH and man.conf(5) cooperate. */
51: defp = getenv("MANPATH");
52: if (NULL == file)
53: file = MAN_CONF_FILE;
54:
55: /* No MANPATH; use man.conf(5) only. */
56: if (NULL == defp || '\0' == defp[0]) {
57: manpath_manconf(dirs, file);
58: return;
59: }
60:
61: /* Prepend man.conf(5) to MANPATH. */
62: if (':' == defp[0]) {
63: manpath_manconf(dirs, file);
64: manpath_parseline(dirs, defp);
65: return;
66: }
1.1 schwarze 67:
1.4 schwarze 68: /* Append man.conf(5) to MANPATH. */
69: if (':' == defp[(int)strlen(defp) - 1]) {
1.1 schwarze 70: manpath_parseline(dirs, defp);
1.4 schwarze 71: manpath_manconf(dirs, file);
72: return;
73: }
74:
75: /* Insert man.conf(5) into MANPATH. */
76: insert = strstr(defp, "::");
77: if (NULL != insert) {
78: *insert++ = '\0';
79: manpath_parseline(dirs, defp);
80: manpath_manconf(dirs, file);
81: manpath_parseline(dirs, insert + 1);
82: return;
83: }
84:
85: /* MANPATH overrides man.conf(5) completely. */
86: manpath_parseline(dirs, defp);
1.1 schwarze 87: }
88:
89: /*
90: * Parse a FULL pathname from a colon-separated list of arrays.
91: */
1.3 schwarze 92: static void
1.1 schwarze 93: manpath_parseline(struct manpaths *dirs, char *path)
94: {
95: char *dir;
96:
97: if (NULL == path)
98: return;
99:
100: for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
101: manpath_add(dirs, dir);
102: }
103:
104: /*
105: * Add a directory to the array, ignoring bad directories.
106: * Grow the array one-by-one for simplicity's sake.
107: */
108: static void
109: manpath_add(struct manpaths *dirs, const char *dir)
110: {
111: char buf[PATH_MAX];
112: char *cp;
113: int i;
114:
115: if (NULL == (cp = realpath(dir, buf)))
116: return;
117:
118: for (i = 0; i < dirs->sz; i++)
119: if (0 == strcmp(dirs->paths[i], dir))
120: return;
121:
122: dirs->paths = mandoc_realloc
123: (dirs->paths,
124: ((size_t)dirs->sz + 1) * sizeof(char *));
125:
126: dirs->paths[dirs->sz++] = mandoc_strdup(cp);
127: }
128:
129: void
130: manpath_free(struct manpaths *p)
131: {
132: int i;
133:
134: for (i = 0; i < p->sz; i++)
135: free(p->paths[i]);
136:
137: free(p->paths);
138: }
139:
140: void
1.2 schwarze 141: manpath_manconf(struct manpaths *dirs, const char *file)
1.1 schwarze 142: {
143: FILE *stream;
144: char *p, *q;
145: size_t len, keysz;
146:
147: keysz = strlen(MAN_CONF_KEY);
148: assert(keysz > 0);
149:
150: if (NULL == (stream = fopen(file, "r")))
151: return;
152:
153: while (NULL != (p = fgetln(stream, &len))) {
154: if (0 == len || '\n' != p[--len])
155: break;
156: p[len] = '\0';
157: while (isspace((unsigned char)*p))
158: p++;
159: if (strncmp(MAN_CONF_KEY, p, keysz))
160: continue;
161: p += keysz;
162: while (isspace(*p))
163: p++;
164: if ('\0' == *p)
165: continue;
166: if (NULL == (q = strrchr(p, '/')))
167: continue;
168: *q = '\0';
169: manpath_add(dirs, p);
170: }
171:
172: fclose(stream);
173: }
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