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RedHat 9 (Linux i386) - man page for acl_set_file (redhat section 3)

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 <a.gruenbacher@computer.org>.

Linux ACL				  March 23, 2002				Linux ACL


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