ACL_CREATE_ENTRY(3) - Linux man page online | Library functions

Create a new ACL entry.

March 23, 2002
ACL_CREATE_ENTRY(3) BSD Library Functions Manual ACL_CREATE_ENTRY(3)


acl_create_entry — create a new ACL entry


Linux Access Control Lists library (libacl, -lacl).


#include <sys/types.h> #include <sys/acl.h> int acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p);


The acl_create_entry() function creates a new ACL entry in the ACL pointed to by the con‐ tents of the pointer argument acl_p. On success, 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 mem‐ ory, when the new ACL is no longer required, by calling acl_free(3) with (void*)*acl_p as an argument. If the ACL working storage 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 qualifier component contains ACL_UNDEFINED_ID, and the set of permissions has no permissions enabled. Any existing ACL entry descriptors that refer to entries in the ACL continue to refer to those entries.


The acl_create_entry() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.


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 allowed by the hard‐ ware or system-imposed memory management constraints.


IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)


acl_init(3), acl_delete_entry(3), acl_free(3), acl_create_entry(3), acl(5)


Derived from the FreeBSD manual pages written by Robert N M Watson <>, and adapted for Linux by Andreas Gruenbacher <>.
Linux ACL March 23, 2002 Linux ACL
This manual Reference Other manuals
acl_create_entry(3) referred by acl(5) | acl_delete_entry(3) | acl_free(3) | acl_get_entry(3) | acl_get_qualifier(3) | acl_get_tag_type(3) | acl_set_qualifier(3) | acl_set_tag_type(3)
refer to acl(5) | acl_delete_entry(3) | acl_free(3) | acl_init(3)
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