acl_valid man page on Archlinux

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ACL_VALID(3)		 BSD Library Functions Manual		  ACL_VALID(3)

NAME
     acl_valid — validate an ACL

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

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

     int
     acl_valid(acl_t acl);

DESCRIPTION
     The acl_valid() function checks the ACL referred to by the argument acl
     for validity.

     The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER
     must exist exactly once in the ACL. If the ACL contains any ACL_USER or
     ACL_GROUP entries, then an ACL_MASK entry is also required. The ACL may
     contain at most one ACL_MASK entry.

     The user identifiers must be unique among all entries of type ACL_USER.
     The group identifiers must be unique among all entries of type ACL_GROUP.

RETURN VALUE
     The acl_valid() 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_valid() function
     returns -1 and sets errno to the corresponding value:

     [EINVAL]		The argument acl is not a valid pointer to an ACL.

			The argument acl does not point to a valid ACL.

			One or more of the required ACL entries is not present
			in acl.

			The ACL contains entries that are not unique.

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

SEE ALSO
     acl_check(3), acl_set_file(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@bestbits.at⟩.

Linux ACL			March 23, 2002			     Linux ACL
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