ACL_TO_ANY_TEXT(3)

NAME

acl_to_any_text -- convert an ACL to text

LIBRARY

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

SYNOPSIS

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

char *
acl_to_any_text(acl_t acl, const char *prefix, char separator,
    int options);

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.

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.

ERRORS

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 mem: ory than is allowed by the hardware or system-imposed memory management constraints.

STANDARDS

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

AUTHOR

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

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See also