matchpathcon(3) — Linux manual page

matchpathcon(3)         SELinux API documentation        matchpathcon(3)

NAME

       matchpathcon, matchpathcon_index - get the default SELinux
       security context for the specified path from the file contexts
       configuration

SYNOPSIS

       #include <selinux/selinux.h>

       int matchpathcon_init(const char *path);

       int matchpathcon_init_prefix(const char *path, const char
       *prefix);

       int matchpathcon_fini(void);

       int matchpathcon(const char *path, mode_t mode, char **con);

       int matchpathcon_index(const char *name, mode_t mode, char
       **con);

DESCRIPTION

       This family of functions is deprecated.  For new code, please use
       selabel_open(3) with the SELABEL_CTX_FILE backend in place of
       matchpathcon_init(), use selabel_close(3) in place of
       matchpathcon_fini(), and use selabel_lookup(3) in place of
       matchpathcon().

       The remaining description below is for the legacy interface.

       matchpathcon_init() loads the file contexts configuration
       specified by path into memory for use by subsequent
       matchpathcon() calls.  If path is NULL, then the active file
       contexts configuration is loaded by default, i.e. the path
       returned by selinux_file_context_path(3).  Unless the
       MATCHPATHCON_BASEONLY flag has been set via
       set_matchpathcon_flags(3), files with the same path prefix but a
       .homedirs and .local suffix are also looked up and loaded if
       present.  These files provide dynamically generated entries for
       user home directories and for local customizations.

       matchpathcon_init_prefix() is the same as matchpathcon_init() but
       only loads entries with regular expressions whose first pathname
       component is a prefix of prefix , e.g. pass "/dev" if you only
       intend to call matchpathcon() with pathnames beginning with /dev.
       However, this optimization is no longer necessary due to the use
       of file_contexts.bin files with precompiled regular expressions,
       so use of this interface is deprecated.

       matchpathcon_fini() frees the memory allocated by a prior call to
       matchpathcon_init.() This function can be used to free and reset
       the internal state between multiple matchpathcon_init() calls, or
       to free memory when finished using matchpathcon().

       matchpathcon() matches the specified pathname, after
       transformation via realpath(3) excepting any final symbolic link
       component if S_IFLNK was specified as the mode, and mode against
       the file contexts configuration and sets the security context con
       to refer to the resulting context. The caller must free the
       returned security context con using freecon(3) when finished
       using it.  mode can be 0 to disable mode matching, but should be
       provided whenever possible, as it may affect the matching.  Only
       the file format bits (i.e. the file type) of the mode are used.
       If matchpathcon_init() has not already been called, then this
       function will call it upon its first invocation with a NULL path,
       defaulting to the active file contexts configuration.

       matchpathcon_index() is the same as matchpathcon() but returns a
       specification index that can later be used in a
       matchpathcon_filespec_add(3) call.

RETURN VALUE

       Returns zero on success or -1 otherwise.

SEE ALSO

       selinux(8), set_matchpathcon_flags(3),
       set_matchpathcon_invalidcon(3), set_matchpathcon_printf(3),
       matchpathcon_filespec_add(3), matchpathcon_checkmatches(3),
       freecon(3), setfilecon(3), setfscreatecon(3)

COLOPHON

       This page is part of the selinux (Security-Enhanced Linux user-
       space libraries and tools) project.  Information about the
       project can be found at 
       ⟨https://github.com/SELinuxProject/selinux/wiki⟩.  If you have a
       bug report for this manual page, see
       ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/SELinuxProject/selinux⟩ on 2024-06-14.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2023-05-11.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

sds@tycho.nsa.gov           21 November 2009             matchpathcon(3)

Pages that refer to this page: matchpathcon_checkmatches(3), selinux_lsetfilecon_default(3), set_matchpathcon_flags(3), matchpathcon(8)

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