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d9c50cac5d
This fixes a stack overflow reported by a user who had both the
definition of text/javascript from shared-mime-info 2.3 and the
definition of text/javascript from shared-mime-info 2.4 installed at the
same time. In 2.3, text/javascript is a subtype of
application/ecmascript, but in 2.4 application/ecmascript is a subtype
of text/javascript. Having both at the same time resulted in circular
inheritance.
The new logic keeps a list of all parents that have already been
checked, which is more comprehensive than the old workaround that was
implemented in commit 38869ece2 ("xdgmime: Prevent infinite loops from
badly-formed MIME registrations").
https://bugs.archlinux.org/task/80279
137 lines
6.1 KiB
C
137 lines
6.1 KiB
C
/* -*- mode: C; c-file-style: "gnu" -*- */
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/* xdgmime.h: XDG Mime Spec mime resolver. Based on version 0.11 of the spec.
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*
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* More info can be found at http://www.freedesktop.org/standards/
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*
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* Copyright (C) 2003 Red Hat, Inc.
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* Copyright (C) 2003 Jonathan Blandford <jrb@alum.mit.edu>
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*
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* Licensed under the Academic Free License version 2.0
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* Or under the following terms:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __XDG_MIME_H__
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#define __XDG_MIME_H__
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#include <stdlib.h>
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#include <sys/stat.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#ifdef XDG_PREFIX
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#define XDG_ENTRY(func) _XDG_ENTRY2(XDG_PREFIX,func)
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#define _XDG_ENTRY2(prefix,func) _XDG_ENTRY3(prefix,func)
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#define _XDG_ENTRY3(prefix,func) prefix##_##func
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#define XDG_RESERVED_ENTRY(func) _XDG_RESERVED_ENTRY2(XDG_PREFIX,func)
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#define _XDG_RESERVED_ENTRY2(prefix,func) _XDG_RESERVED_ENTRY3(prefix,func)
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#define _XDG_RESERVED_ENTRY3(prefix,func) _##prefix##_##func
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#endif
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typedef void (*XdgMimeCallback) (void *user_data);
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typedef void (*XdgMimeDestroy) (void *user_data);
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#ifdef XDG_PREFIX
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#define xdg_mime_get_mime_type_for_data XDG_ENTRY(get_mime_type_for_data)
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#define xdg_mime_get_mime_type_for_file XDG_ENTRY(get_mime_type_for_file)
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#define xdg_mime_get_mime_type_from_file_name XDG_ENTRY(get_mime_type_from_file_name)
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#define xdg_mime_get_mime_types_from_file_name XDG_ENTRY(get_mime_types_from_file_name)
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#define xdg_mime_is_valid_mime_type XDG_ENTRY(is_valid_mime_type)
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#define xdg_mime_mime_type_equal XDG_ENTRY(mime_type_equal)
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#define xdg_mime_media_type_equal XDG_ENTRY(media_type_equal)
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#define xdg_mime_mime_type_subclass XDG_ENTRY(mime_type_subclass)
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#define xdg_mime_get_mime_parents XDG_ENTRY(get_mime_parents)
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#define xdg_mime_list_mime_parents XDG_ENTRY(list_mime_parents)
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#define xdg_mime_unalias_mime_type XDG_ENTRY(unalias_mime_type)
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#define xdg_mime_get_max_buffer_extents XDG_ENTRY(get_max_buffer_extents)
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#define xdg_mime_shutdown XDG_ENTRY(shutdown)
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#define xdg_mime_dump XDG_ENTRY(dump)
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#define xdg_mime_register_reload_callback XDG_ENTRY(register_reload_callback)
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#define xdg_mime_remove_callback XDG_ENTRY(remove_callback)
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#define xdg_mime_type_unknown XDG_ENTRY(type_unknown)
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#define xdg_mime_type_empty XDG_ENTRY(type_empty)
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#define xdg_mime_type_textplain XDG_ENTRY(type_textplain)
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#define xdg_mime_get_icon XDG_ENTRY(get_icon)
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#define xdg_mime_get_generic_icon XDG_ENTRY(get_generic_icon)
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#define _xdg_mime_mime_type_equal XDG_RESERVED_ENTRY(mime_type_equal)
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#define _xdg_mime_mime_type_subclass XDG_RESERVED_ENTRY(mime_type_subclass)
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#define _xdg_mime_unalias_mime_type XDG_RESERVED_ENTRY(unalias_mime_type)
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#endif
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extern const char xdg_mime_type_unknown[];
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extern const char xdg_mime_type_empty[];
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extern const char xdg_mime_type_textplain[];
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#define XDG_MIME_TYPE_UNKNOWN xdg_mime_type_unknown
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#define XDG_MIME_TYPE_EMPTY xdg_mime_type_empty
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#define XDG_MIME_TYPE_TEXTPLAIN xdg_mime_type_textplain
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const char *xdg_mime_get_mime_type_for_data (const void *data,
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size_t len,
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int *result_prio);
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const char *xdg_mime_get_mime_type_for_file (const char *file_name,
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struct stat *statbuf);
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const char *xdg_mime_get_mime_type_from_file_name (const char *file_name);
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int xdg_mime_get_mime_types_from_file_name(const char *file_name,
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const char *mime_types[],
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int n_mime_types);
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int xdg_mime_is_valid_mime_type (const char *mime_type);
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int xdg_mime_mime_type_equal (const char *mime_a,
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const char *mime_b);
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int xdg_mime_media_type_equal (const char *mime_a,
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const char *mime_b);
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int xdg_mime_mime_type_subclass (const char *mime_a,
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const char *mime_b);
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/* xdg_mime_get_mime_parents() is deprecated since it does
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* not work correctly with caches. Use xdg_mime_list_parents()
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* instead, but notice that that function expects you to free
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* the array it returns.
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*/
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const char **xdg_mime_get_mime_parents (const char *mime);
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char ** xdg_mime_list_mime_parents (const char *mime);
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const char *xdg_mime_unalias_mime_type (const char *mime);
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const char *xdg_mime_get_icon (const char *mime);
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const char *xdg_mime_get_generic_icon (const char *mime);
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int xdg_mime_get_max_buffer_extents (void);
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void xdg_mime_shutdown (void);
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void xdg_mime_dump (void);
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int xdg_mime_register_reload_callback (XdgMimeCallback callback,
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void *data,
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XdgMimeDestroy destroy);
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void xdg_mime_remove_callback (int callback_id);
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void xdg_mime_set_dirs (const char * const *dirs);
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/* Private versions of functions that don't call xdg_mime_init () */
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int _xdg_mime_mime_type_equal (const char *mime_a,
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const char *mime_b);
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int _xdg_mime_mime_type_subclass (const char *mime,
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const char *base,
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const char **seen);
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const char *_xdg_mime_unalias_mime_type (const char *mime);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __XDG_MIME_H__ */
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