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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON |
ACL_GET_FILE(3) BSD Library Functions Manual ACL_GET_FILE(3)
acl_get_file — get an ACL by filename
Linux Access Control Lists library (libacl, -lacl).
#include <sys/types.h>
#include <sys/acl.h>
acl_t
acl_get_file(const char *path_p, acl_type_t type);
The acl_get_file() function retrieves the access ACL associated with a
file or directory, or the default ACL associated with a directory. The
pathname for the file or directory is pointed to by the argument
path_p. The ACL is placed into working storage and acl_get_file()
returns a pointer to that storage.
In order to read an ACL from an object, a process must have read access
to the object's attributes.
The value of the argument type is used to indicate whether the access
ACL or the default ACL associated with path_p is returned. If type is
ACL_TYPE_ACCESS, the access ACL of path_p is returned. If type is
ACL_TYPE_DEFAULT, the default ACL of path_p is returned. If type is
ACL_TYPE_DEFAULT and no default ACL is associated with the directory
path_p, then an ACL containing zero ACL entries is returned. If type
specifies a type of ACL that cannot be associated with path_p, then the
function fails.
This function may cause memory to be allocated. The caller should free
any releasable memory, when the new ACL is no longer required, by call‐
ing acl_free(3) with the (void*)acl_t returned by acl_get_file() as an
argument.
On success, this function returns a pointer to the working storage. On
error, a value of (acl_t)NULL is returned, and errno is set appropri‐
ately.
If any of the following conditions occur, the acl_get_file() function
returns a value of (acl_t)NULL and sets errno to the corresponding
value:
[EACCES] Search permission is denied for a component of the
path prefix or the object exists and the process
does not have appropriate access rights.
Argument type specifies a type of ACL that cannot be
associated with path_p.
[EINVAL] The argument type is not ACL_TYPE_ACCESS or
ACL_TYPE_DEFAULT.
[ENAMETOOLONG] The length of the argument path_p is too long.
[ENOENT] The named object does not exist or the argument
path_p points to an empty string.
[ENOMEM] The ACL working storage requires more memory than is
allowed by the hardware or system-imposed memory
management constraints.
[ENOTDIR] A component of the path prefix is not a directory.
[ENOTSUP] The file system on which the file identified by
path_p is located does not support ACLs, or ACLs are
disabled.
IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
acl_free(3), acl_get_entry(3), acl_get_fd(3), acl_set_file(3), acl(5)
Derived from the FreeBSD manual pages written by Robert N M Watson
<rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
<a.gruenbacher@bestbits.at>.
This page is part of the acl (manipulating access control lists)
project. Information about the project can be found at
http://savannah.nongnu.org/projects/acl. If you have a bug report for
this manual page, see http://savannah.nongnu.org/bugs/?group=acl. This
page was obtained from the project's upstream Git repository
git://git.savannah.nongnu.org/acl.git on 2017-07-05. 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
Linux ACL March 23, 2002 Linux ACL