Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
int
acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
DESCRIPTION
The acl_create_entry() function creates a new ACL entry in the ACL point
ed to by the contents of the pointer argument acl_p. Upon successful com
pletion, the function returns a descriptor for the new ACL entry via
entry_p.
This function may cause memory to be allocated. The caller should free
any releasable memory, when the new ACL is no longer required, by calling
acl_free(3) with (void*)*acl_p as an argument. If the ACL working stor
age cannot be increased in the current location, then the working storage
for the ACL pointed to by acl_p may be relocated and the previous working
storage is released. A pointer to the new working storage is returned via
acl_p.
The components of the new ACL entry are initialized in the following
ways: the ACL tag type component contains ACL_UNDEFINED_TAG, the qualifi
er component contains ACL_UNDEFINED_ID, and the set of permissions has no
permissions enabled. Any existing ACL entry descriptors that refer to en
tries in the ACL continue to refer to those entries.
RETURN VALUE
The acl_create_entry() function returns the value 0 if successful; other
wise the value -1 is returned and the global variable errno is set to in
dicate the error.
ERRORS
If any of the following conditions occur, the acl_create_entry() function
returns -1 and sets errno to the corresponding value:
[EINVAL] The argument acl_p is not a valid pointer to an ACL.
[ENOMEM] The ACL working storage requires more memory than is al
lowed by the hardware or system-imposed memory management
constraints.
STANDARDS
IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)
SEE ALSO
acl_init(3), acl_delete_entry(3), acl_free(3), acl_create_entry(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 1
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