acl_set_file

ACL_SET_FILE(3)           BSD Library Functions Manual           ACL_SET_FILE(3)

NAME
     acl_set_file — set an ACL by filename

LIBRARY
     Linux Access Control Lists library (libacl, -lacl).

SYNOPSIS
     #include <sys/types.h>
     #include <sys/acl.h>

     int
     acl_set_file(const char *path_p, acl_type_t type, acl_t acl);

DESCRIPTION
     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.

RETURN VALUE
     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.

ERRORS
     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.

STANDARDS
     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().

SEE ALSO
     acl_delete_def_file(3), acl_get_file(3), acl_set_fd(3), acl_valid(3),
     acl(5)

AUTHOR
     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>.

Linux ACL                        March 23, 2002                        Linux ACL