acl_check(3) [centos man page]

ACL_CHECK(3)						   BSD Library Functions Manual 					      ACL_CHECK(3)

NAME

     acl_check -- check an ACL for validity

LIBRARY

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

SYNOPSIS

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

     int
     acl_check(acl_t acl, int *last);

DESCRIPTION

     The acl_check() 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.

     If the ACL referred to by acl is invalid, acl_check() returns a positive error code that indicates which type of error was detected.  The
     following symbolic error codes are defined:

     ACL_MULTI_ERROR	   The ACL contains multiple entries that have a tag type that may occur at most once.

     ACL_DUPLICATE_ERROR   The ACL contains multiple ACL_USER entries with the same user ID, or multiple ACL_GROUP entries with the same group ID.

     ACL_MISS_ERROR	   A required entry is missing.

     ACL_ENTRY_ERROR	   The ACL contains an invalid entry tag type.

     The acl_error() function can be used to translate error codes to text messages.

     In addition, if the pointer last is not NULL, acl_check() assigns the number of the ACL entry at which the error was detected to the value
     pointed to by last.  Entries are numbered starting with zero, in the order in which they would be returned by the acl_get_entry() function.

RETURN VALUE

     If successful, the acl_check() function returns 0 if the ACL referred to by acl is valid, and a positive error code if the ACL is invalid.
     Otherwise, a value of -1 is returned and the global variable errno is set to indicate the error.

ERRORS

     If any of the following conditions occur, the acl_check() function returns -1 and sets errno to the corresponding value:

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

STANDARDS

     This is a non-portable, Linux specific extension to the ACL manipulation functions defined in IEEE Std 1003.1e draft 17 ("POSIX.1e", aban-
     doned).

SEE ALSO

     acl_valid(3), acl(5)

AUTHOR

     Written by Andreas Gruenbacher <a.gruenbacher@bestbits.at>.

Linux ACL							  March 23, 2002							 Linux ACL

Check Out this Related Man Page

ACL_CALC_MASK(3)					   BSD Library Functions Manual 					  ACL_CALC_MASK(3)

NAME

     acl_calc_mask -- calculate the file group class mask

LIBRARY

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

SYNOPSIS

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

     int
     acl_calc_mask(acl_t *acl_p);

DESCRIPTION

     The acl_calc_mask() function calculates and sets the permissions associated with the ACL_MASK ACL entry of the ACL referred to by acl_p.  The
     value of the new permissions is the union of the permissions granted by all entries of tag type ACL_GROUP, ACL_GROUP_OBJ, or ACL_USER.  If
     the ACL referred to by acl_p already contains an ACL_MASK entry, its permissions are overwritten; if it does not contain an ACL_MASK entry,
     one is added.

     If the ACL referred to by acl_p does not contain enough space for the new ACL entry, then additional working storage may be allocated. If the
     working storage cannot be increased in the current location, then it may be relocated and the previous working storage is released and a
     pointer to the new working storage is returned via acl_p.

     The order of existing entries in the ACL is undefined after this function.

     Any existing ACL entry descriptors that refer to entries in the ACL continue to refer to those entries. Any existing ACL pointers that refer
     to the ACL referred to by acl_p continue to refer to the ACL.

RETURN VALUE

     The acl_calc_mask() 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_calc_mask() function returns -1 and sets errno to the corresponding value:

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

     [ENOMEM]		The acl_calc_mask() function is unable to allocate the memory required for an ACL_MASK ACL entry.

STANDARDS

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

SEE ALSO

     acl_check(3), acl_get_entry(3), acl_valid(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

Linux and UNIX Man Pages

acl_check(3) [centos man page]

Check Out this Related Man Page