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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 <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "xvasprintf.h"
#include "gettext.h"
#define _(String) gettext (String)
#include "manconfig.h"
#include "error.h"
#include "db_storage.h"
#include "filenames.h"
static void gripe_bogus_manpage (const char *manpage)
{
if (quiet < 2)
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, (void *) 0);
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. req_name is the page name that was requested.
*
* 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 (if COMP_SRC is defined).
*
* Only the fields name, ext, sec, and comp are filled in by this function.
* name is only set if it differs from req_name; otherwise it remains at
* NULL.
*/
char *filename_info (const char *file, struct mandata *info,
const char *req_name)
{
char *manpage = xstrdup (file);
char *slash = strrchr (manpage, '/');
char *base_name;
memset (info, 0, sizeof (struct mandata));
#ifdef COMP_SRC
struct compression *comp;
#endif
if (slash) {
*slash = '\0'; /* strip '/base_name' */
base_name = slash + 1;
} else
base_name = manpage;
/* Bogus files either have (i) no period, ie no extension, (ii)
a compression extension, but no sectional extension, (iii)
a missmatch between the section they are under and the
sectional part of their extension. */
#ifdef COMP_SRC
comp = comp_info (base_name, 1);
if (comp) {
info->comp = comp->ext;
*(base_name + strlen (comp->stem)) = '\0';
free (comp->stem);
} else
info->comp = NULL;
#else /* !COMP_SRC */
info->comp = NULL;
#endif /* COMP_SRC */
{
char *ext = strrchr (base_name, '.');
if (!ext) {
/* no section extension */
gripe_bogus_manpage (file);
free (manpage);
return NULL;
}
*ext++ = '\0'; /* set section ext */
info->ext = ext;
if (!*info->ext) {
/* zero-length section extension */
gripe_bogus_manpage (file);
free (manpage);
return NULL;
}
}
info->sec = strrchr (manpage, '/') + 4; /* set section name */
if (strlen (info->sec) >= 1 && strlen (info->ext) >= 1 &&
info->sec[0] != info->ext[0]) {
/* mismatch in section */
gripe_bogus_manpage (file);
free (manpage);
return NULL;
}
if (req_name && !STREQ (base_name, req_name))
info->name = xstrdup (base_name);
else
info->name = NULL;
return manpage;
}
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