преобразовать ACL в текст (convert an ACL to text)
Имя (Name)
acl_to_any_text — convert an ACL to text
Библиотека (Library)
Linux Access Control Lists library (libacl, -lacl).
Синопсис (Synopsis)
#include <sys/types.h>
#include <acl/libacl.h>
char *
acl_to_any_text(acl_t acl, const char *prefix, char separator,
int options);
Описание (Description)
The acl_to_any_text() function translates the ACL pointed to by the
argument acl into a NULL terminated character string. This
character string is composed of the ACL entries contained in acl,
in the entry text format described on acl(5). Entries are
separated from each other by the separator character. If the
argument prefix is not (const char *)NULL, each entry is prefixed
by this character string.
If the argument options is 0, ACL entries are converted using the
entry tag type keywords user, group, mask, and other. User IDs and
group IDs of ACL entries that contain such qualifiers are converted
to their corresponding names; if an identifier has no corresponding
name, a decimal number string is produced. The ACL text
representation contains no additional comments. A bitwise
combinations of the following options can be used to modify the
result:
TEXT_ABBREVIATE
Instead of the full tag type keywords, single letter
abbreviations are used. The abbreviation for user is u,
the abbreviation for group is g, the abbreviation for mask
is m, and the abbreviation for other is o.
TEXT_NUMERIC_IDS
User IDs and group IDs are included as decimal numbers
instead of names.
TEXT_SOME_EFFECTIVE
A comment containing the effective permissions of the ACL
entry is included after ACL entries that contain
permissions which are ineffective because they are masked
by an ACL_MASK entry. The ACL entry and the comment are
separated by a tab character.
TEXT_ALL_EFFECTIVE
A comment containing the effective permissions of the ACL
entry is included after all ACL entries that are affected
by an ACL_MASK entry. The comment is included even if the
permissions contained in the ACL entry equal the effective
permissions. The ACL entry and the comment are separated by
a tab character.
TEXT_SMART_INDENT
This option is used in combination with the
TEXT_SOME_EFFECTIVE or TEXT_ALL_EFFECTIVE option. The
number of tab characters inserted between the ACL entry and
the comment is increased so that the comment is aligned to
the fourth tab stop position. A tab width of 8 characters
is assumed.
The ACL referred to by acl is not changed.
This function allocates any memory necessary to contain the string
and returns a pointer to the string. The caller should free any
releasable memory, when the new string is no longer required, by
calling acl_free() with the (void*)char returned by
acl_to_any_text() as an argument.
Возвращаемое значение (Return value)
On success, this function returns a pointer to the text
representation of the ACL. On error, a value of (char *)NULL is
returned, and errno is set appropriately.
Ошибки (Error)
If any of the following conditions occur, the acl_to_any_text()
function returns a value of (char *)NULL and sets errno to the
corresponding value:
[EINVAL] The argument acl is not a valid pointer to an
ACL.
The ACL referenced by acl contains one or more
improperly formed ACL entries, or for some other
reason cannot be translated into the text form
of an ACL.
[ENOMEM] The character string to be returned requires
more memory than is allowed by the hardware or
system-imposed memory management constraints.
Стандарты (Conforming to)
This is a non-portable, Linux specific extension to the ACL
manipulation functions defined in IEEE Std 1003.1e draft 17
('POSIX.1e', abandoned).
Смотри также (See also)
acl_from_text(3), acl_to_text(3), acl_free(3), acl(5)
