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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON |
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ACL_GET_FILE(3) Library Functions Manual ACL_GET_FILE(3)
acl_get_file — get an ACL by filename
Linux Access Control Lists library (libacl, -lacl).
<sys/types.h> <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 calling 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 appropriately.
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 <andreas.gruenbacher@gmail.com>.
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 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-05-12.) 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 ACL_GET_FILE(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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