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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON |
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ACL_SET_FILE(3) Library Functions Manual ACL_SET_FILE(3)
acl_set_file — set an ACL by filename
Linux Access Control Lists library (libacl, -lacl).
<sys/types.h> <sys/acl.h> int acl_set_file(const char *path_p,
acl_type_t type, acl_t acl)
The acl_set_file() function associates an access ACL with a file
or directory, or associates a default ACL with a directory. The
pathname for the file or directory is pointed to by the argument
path_p.
The effective user ID of the process must match the owner of the
file or directory or the process must have the CAP_FOWNER
capability for the request to succeed.
The value of the argument type is used to indicate whether the
access ACL or the default ACL associated with path_p is being
set. If the type parameter is ACL_TYPE_ACCESS, the access ACL of
path_p shall be set. If the type parameter is ACL_TYPE_DEFAULT,
the default ACL of path_p shall be set. If the argument type
specifies a type of ACL that cannot be associated with path_p,
then the function fails.
The acl parameter must reference a valid ACL according to the
rules described on the acl_valid(3) manual page if the type
parameter is ACL_TYPE_ACCESS, and must either reference a valid
ACL or an ACL with zero ACL entries if the type parameter is
ACL_TYPE_DEFAULT. If the acl parameter references an empty ACL,
then the acl_set_file() function removes any default ACL
associated with the directory referred to by the path_p
parameter.
The acl_set_file() function returns the value 0 if successful;
otherwise the value -1 is returned and the global variable errno
is set to indicate the error.
If any of the following conditions occur, the acl_set_file()
function returns -1 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 acl does not point to a valid
ACL.
The ACL has more entries than the file
referred to by path_p can obtain.
The type parameter is not ACL_TYPE_ACCESS or
ACL_TYPE_DEFAULT.
The type parameter is ACL_TYPE_DEFAULT, but
the file referred to by path_p is not a
directory.
[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.
[ENOSPC] The directory or file system that would
contain the new ACL cannot be extended or the
file system is out of file allocation
resources.
[ENOTDIR] A component of the path prefix is not a
directory.
[ENOTSUP] The file identified by path_p cannot be
associated with the ACL because the file
system on which the file is located does not
support this.
[EPERM] The process does not have appropriate
privilege to perform the operation to set the
ACL.
[EROFS] This function requires modification of a file
system which is currently read-only.
IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
The behavior of acl_set_file() when the acl parameter refers to
an empty ACL and the type parameter is ACL_TYPE_DEFAULT is an
extension in the Linux implementation, in order that all values
returned by acl_get_file() can be passed to acl_set_file(). The
POSIX.1e function for removing a default ACL is
acl_delete_def_file().
acl_delete_def_file(3), acl_get_file(3), acl_set_fd(3),
acl_valid(3), acl(5)
Derived from the FreeBSD manual pages written by Robert N M
Watson <[email protected]>, and adapted for Linux by Andreas
Gruenbacher <[email protected]>.
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 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-04-25.) 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
[email protected]
Linux ACL March 23, 2002 ACL_SET_FILE(3)
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HTML rendering created 2024-06-26 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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