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acl_get_entry(3) [suse man page]

ACL_GET_ENTRY(3)					   BSD Library Functions Manual 					  ACL_GET_ENTRY(3)

NAME
acl_get_entry -- get an ACL entry LIBRARY
Linux Access Control Lists library (libacl, -lacl). SYNOPSIS
#include <sys/types.h> #include <sys/acl.h> int acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p); DESCRIPTION
The acl_get_entry() function obtains a descriptor for an ACL entry as specified by entry_id within the ACL indicated by the argument acl. If the value of entry_id is ACL_FIRST_ENTRY, then the function returns in entry_p a descriptor for the first ACL entry within acl. If the value of entry_id is ACL_NEXT_ENTRY, then the function returns in entry_p a descriptor for the next 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_get_entry() following a call to acl_calc_mask(), acl_copy_int(), 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 effect is unspecified. Calls to acl_get_entry() do not modify any ACL entries. Subsequent operations using the returned ACL entry descriptor operate on the ACL entry within the ACL in working storage. The order of all existing entries in the ACL remains unchanged. Any existing ACL entry descriptors that refer to entries within the ACL continue to refer to those entries. Any existing ACL pointers that refer to the ACL referred to by acl continue to refer to the ACL. RETURN VALUE
If the function successfully obtains an ACL entry, the function returns a value of 1. If the ACL has no ACL entries, the function returns the value 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(), the function returns the value 0 until a successful call with an entry_id of ACL_FIRST_ENTRY is made. Otherwise, the value -1 is returned and errno is set to indicate the error. ERRORS
If any of the following conditions occur, the acl_get_entry() function returns -1 and sets errno to the corresponding value: [EINVAL] The argument acl_p is not a valid pointer to an ACL. The argument entry_id is neither ACL_NEXT_ENTRY nor ACL_FIRST_ENTRY. STANDARDS
IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned) SEE ALSO
acl_calc_mask(3), acl_create_entry(3), acl_copy_entry(3), acl_delete_entry(3), acl_get_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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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
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