It is a suite of ISC licensed tools to compile and render mdoc/man pages and will replace groff for formatting manpages in the base system. http://mdocml.bsd.lv/
226 lines
4.8 KiB
C
226 lines
4.8 KiB
C
/* $Id: manpath.c,v 1.8 2011/12/24 22:37:16 kristaps Exp $ */
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/*
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* Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
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* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/param.h>
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#include <assert.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mandoc.h"
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#include "manpath.h"
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#define MAN_CONF_FILE "/etc/man.conf"
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#define MAN_CONF_KEY "_whatdb"
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static void manpath_add(struct manpaths *, const char *);
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static void manpath_parseline(struct manpaths *, char *);
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void
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manpath_parse(struct manpaths *dirs, const char *file,
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char *defp, char *auxp)
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{
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#ifdef USE_MANPATH
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char cmd[(MAXPATHLEN * 3) + 20];
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FILE *stream;
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char *buf;
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size_t sz, bsz;
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strlcpy(cmd, "manpath", sizeof(cmd));
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if (file) {
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strlcat(cmd, " -C ", sizeof(cmd));
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strlcat(cmd, file, sizeof(cmd));
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}
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if (auxp) {
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strlcat(cmd, " -m ", sizeof(cmd));
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strlcat(cmd, auxp, sizeof(cmd));
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}
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if (defp) {
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strlcat(cmd, " -M ", sizeof(cmd));
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strlcat(cmd, defp, sizeof(cmd));
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}
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/* Open manpath(1). Ignore errors. */
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stream = popen(cmd, "r");
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if (NULL == stream)
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return;
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buf = NULL;
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bsz = 0;
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/* Read in as much output as we can. */
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do {
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buf = mandoc_realloc(buf, bsz + 1024);
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sz = fread(buf + (int)bsz, 1, 1024, stream);
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bsz += sz;
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} while (sz > 0);
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if ( ! ferror(stream) && feof(stream) &&
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bsz && '\n' == buf[bsz - 1]) {
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buf[bsz - 1] = '\0';
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manpath_parseline(dirs, buf);
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}
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free(buf);
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pclose(stream);
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#else
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char *insert;
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/* Always prepend -m. */
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manpath_parseline(dirs, auxp);
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/* If -M is given, it overrides everything else. */
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if (NULL != defp) {
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manpath_parseline(dirs, defp);
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return;
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}
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/* MANPATH and man.conf(5) cooperate. */
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defp = getenv("MANPATH");
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if (NULL == file)
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file = MAN_CONF_FILE;
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/* No MANPATH; use man.conf(5) only. */
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if (NULL == defp || '\0' == defp[0]) {
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manpath_manconf(dirs, file);
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return;
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}
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/* Prepend man.conf(5) to MANPATH. */
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if (':' == defp[0]) {
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manpath_manconf(dirs, file);
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manpath_parseline(dirs, defp);
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return;
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}
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/* Append man.conf(5) to MANPATH. */
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if (':' == defp[(int)strlen(defp) - 1]) {
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manpath_parseline(dirs, defp);
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manpath_manconf(dirs, file);
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return;
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}
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/* Insert man.conf(5) into MANPATH. */
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insert = strstr(defp, "::");
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if (NULL != insert) {
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*insert++ = '\0';
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manpath_parseline(dirs, defp);
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manpath_manconf(dirs, file);
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manpath_parseline(dirs, insert + 1);
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return;
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}
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/* MANPATH overrides man.conf(5) completely. */
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manpath_parseline(dirs, defp);
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#endif
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}
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/*
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* Parse a FULL pathname from a colon-separated list of arrays.
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*/
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static void
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manpath_parseline(struct manpaths *dirs, char *path)
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{
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char *dir;
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if (NULL == path)
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return;
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for (dir = strtok(path, ":"); dir; dir = strtok(NULL, ":"))
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manpath_add(dirs, dir);
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}
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/*
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* Add a directory to the array, ignoring bad directories.
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* Grow the array one-by-one for simplicity's sake.
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*/
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static void
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manpath_add(struct manpaths *dirs, const char *dir)
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{
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char buf[PATH_MAX];
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char *cp;
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int i;
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if (NULL == (cp = realpath(dir, buf)))
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return;
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for (i = 0; i < dirs->sz; i++)
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if (0 == strcmp(dirs->paths[i], dir))
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return;
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dirs->paths = mandoc_realloc
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(dirs->paths,
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((size_t)dirs->sz + 1) * sizeof(char *));
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dirs->paths[dirs->sz++] = mandoc_strdup(cp);
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}
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void
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manpath_free(struct manpaths *p)
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{
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int i;
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for (i = 0; i < p->sz; i++)
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free(p->paths[i]);
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free(p->paths);
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}
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void
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manpath_manconf(struct manpaths *dirs, const char *file)
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{
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FILE *stream;
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char *p, *q;
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size_t len, keysz;
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keysz = strlen(MAN_CONF_KEY);
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assert(keysz > 0);
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if (NULL == (stream = fopen(file, "r")))
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return;
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while (NULL != (p = fgetln(stream, &len))) {
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if (0 == len || '\n' != p[--len])
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break;
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p[len] = '\0';
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while (isspace((unsigned char)*p))
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p++;
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if (strncmp(MAN_CONF_KEY, p, keysz))
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continue;
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p += keysz;
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while (isspace(*p))
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p++;
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if ('\0' == *p)
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continue;
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if (NULL == (q = strrchr(p, '/')))
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continue;
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*q = '\0';
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manpath_add(dirs, p);
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}
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fclose(stream);
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}
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