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