ACL_CALC_MASK(3)

ACL_CALC_MASK(3) | Library Functions Manual | ACL_CALC_MASK(3)

# NAME

`acl_calc_mask` —
calculate and set ACL mask permissions

# LIBRARY

Standard C Library (libc, -lc)

# SYNOPSIS

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

int
`acl_calc_mask`(acl_t *acl_p);

# DESCRIPTION

The `acl_calc_mask`() function is a POSIX.1e call that calculates and set the permissions associated with the `ACL_MASK` ACL entry of the ACL referred to by acl_p.

The value of new permissions are the union of the permissions granted by the `ACL_GROUP`, `ACL_GROUP_OBJ`, `ACL_USER` tag types which match processes in the file group class contained in the ACL referred to by acl_p.

If the ACL referred to by acl_p already contains an `ACL_MASK` entry, its permissions shall be overwritten; if it does not contain an `ACL_MASK` entry, one shall be added.

# RETURN VALUES

The `acl_calc_mask`() 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

The `acl_calc_mask`() function fails if:

[`EINVAL`]
  Argument acl_p does not point to a pointer to a valid ACL.

# SEE ALSO

acl(3), acl_get_entry(3), acl_valid(3), posix1e(3)

# STANDARDS

POSIX.1e is described in IEEE POSIX.1e draft 17.

# HISTORY

POSIX.1e support was introduced in FreeBSD 4.0. The `acl_calc_mask`() function was added in FreeBSD 5.0.

# AUTHORS

The `acl_calc_mask`() function was written by Chris D. Faulhaber <jedgar@fxp.org>.

March 10, 2001 | NetBSD 10.0