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/*
* filenames.c: compose and dissect man page file names
*
* Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
* Copyright (C) 2001, 2002 Colin Watson.
*
* This file is part of man-db.
*
* man-db is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* man-db is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with man-db; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dirname.h"
#include "error.h"
#include "xalloc.h"
#include "xvasprintf.h"
#include "gettext.h"
#define _(String) gettext (String)
#include "manconfig.h"
#include "appendstr.h"
#include "compression.h"
#include "debug.h"
#include "filenames.h"
static void gripe_bogus_manpage (const char *manpage)
{
error (0, 0, _ ("warning: %s: ignoring bogus filename"), manpage);
}
char *make_filename (const char *path, const char *name, struct mandata *in,
const char *type)
{
static char *file;
if (!name)
name = in->name; /* comes from dblookup(), so non-NULL */
file = xasprintf ("%s/%s%s/%s.%s", path, type, in->sec, name, in->ext);
if (in->comp && *in->comp != '-') /* Is there an extension? */
file = appendstr (file, ".", in->comp, nullptr);
debug ("Checking physical location: %s\n", file);
if (!CAN_ACCESS (file, R_OK)) {
free (file);
return NULL;
}
return file;
}
/* Fill in a mandata structure with information about a file name.
* file is the name to examine. info points to the structure to be filled
* in.
*
* Returns either a pointer to the buffer which the fields in info point
* into, to be freed by the caller, or NULL on error. The buffer will
* contain either three or four null-terminated strings: the directory name,
* the base of the file name in that directory, the section extension, and
* optionally the compression extension.
*
* Only the fields name, ext, sec, and comp are filled in by this function.
*/
struct mandata *filename_info (const char *file, bool warn_if_bogus)
{
struct mandata *info;
char *basename, *dirname;
struct compression *comp;
info = XZALLOC (struct mandata);
basename = base_name (file);
/* Bogus files either have (i) no period, ie no extension, (ii)
a compression extension, but no sectional extension, (iii)
a mismatch between the section they are under and the
sectional part of their extension. */
comp = comp_info (basename, true);
if (comp) {
info->comp = xstrdup (comp->ext);
*(basename + strlen (comp->stem)) = '\0';
free (comp->stem);
} else
info->comp = NULL;
{
char *ext = strrchr (basename, '.');
if (!ext) {
/* no section extension */
if (warn_if_bogus)
gripe_bogus_manpage (file);
free (basename);
free_mandata_struct (info);
return NULL;
}
*ext++ = '\0'; /* set section ext */
info->ext = xstrdup (ext);
if (!*info->ext) {
/* zero-length section extension */
if (warn_if_bogus)
gripe_bogus_manpage (file);
free (basename);
free_mandata_struct (info);
return NULL;
}
}
/* Set section name. */
dirname = dir_name (file);
info->sec = xstrdup (strrchr (dirname, '/') + 4);
free (dirname);
if (strlen (info->sec) >= 1 && strlen (info->ext) >= 1 &&
info->sec[0] != info->ext[0]) {
/* mismatch in section */
if (warn_if_bogus)
gripe_bogus_manpage (file);
free (basename);
free_mandata_struct (info);
return NULL;
}
info->name = xstrdup (basename);
return info;
}
/* Free a mandata structure and its elements. */
void free_mandata_struct (struct mandata *pinfo)
{
if (pinfo) {
free (pinfo->name);
free (pinfo->ext);
free (pinfo->sec);
free (pinfo->pointer);
free (pinfo->comp);
free (pinfo->filter);
free (pinfo->whatis);
}
free (pinfo);
}
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