acl_get_entry3
Retrieve an acl entry from an acl
Usage
#include <sys/types.h>
#include <sys/acl.h>
int
acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p);
Library
Standard C Library (libc, -lc)
Overview
The acl_get_entry() function is a POSIX.1e call that retrieves a descriptor for an ACL entry specified by the argument entry_id within the ACL indicated by the argument acl.
If the value of entry_id is ACL_FIRST_ENTRY, then the function will return in entry_p a descriptor for the first ACL entry within acl. If a call is made to acl_get_entry() with entry_id set to ACL_NEXT_ENTRY when there has not been either an initial successful call to acl_get_entry(), or a previous successful call to acl_create_entry(), acl_delete_entry(), acl_dup(), acl_from_text(), acl_get_fd(), acl_get_file(), acl_set_fd(), acl_set_file(), or acl_valid(), then the result is unspecified.
Return values
If the acl_get_entry() function successfully obtains an ACL entry, a value of 1 is returned. If the ACL has no ACL entries, the acl_get_entry() returns a value of 0. If the value of entry_id is ACL_NEXT_ENTRY and the last ACL entry in the ACL has already been returned by a previous call to acl_get_entry(), a value of 0 will be returned until a successful call with entry_id of ACL_FIRST_ENTRY is made. Otherwise, a value of -1 will be returned and the global variable errno will be set to indicate the error.
Errors
The acl_get_entry() function fails if:
- [EINVAL]
-
Argument acl does not point to a valid ACL. Argument entry_id is neither ACL_FIRST_ENTRY nor ACL_NEXT_ENTRY.
Releases
56 releases since FreeBSD 5.0-RELEASE; the text changed 38 times.