/ library calls / Acl_add_perm - Add A Permission To An ACL Permission Set


acl_add_perm - add a permission to an ACL permission set
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
#include <sys/types.h>
#include <sys/acl.h>

int
acl_add_perm(acl_permset_t permset_d, acl_perm_t perm);
DESCRIPTION
The acl_add_perm() function adds the permission contained in the argument perm to the permission set referred to by the argument permset_d. An attempt to add a permission that is already contained in the permission set is not considered an error.

Any existing descriptors that refer to permset_d continue to refer to that permission set.
RETURN VALUE
The acl_add_perm() 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_add_perm() function returns -1 and sets errno to the corresponding value:
[EINVAL]
The argument permset_d is not a valid descriptor for a permission set within an ACL entry.

The argument perm does not contain a valid acl_perm_t value.
STANDARDS
IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
SEE ALSO
acl_clear_perms , acl_delete_perm , acl_get_perm , acl_get_permset , acl_set_permset , acl
AUTHOR
Derived from the FreeBSD manual pages written by Robert N M Watson ⟨rwatson [ät] FreeBSD.org⟩, and adapted for Linux by Andreas Gruenbacher ⟨a.gruenbacher [ät] bestbits.at⟩.
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