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 memory 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).

SEE ALSO

     acl_from_text(3), acl_to_text(3), acl_free(3), acl(5)

AUTHOR

     Written by Andreas Gruenbacher <andreas.gruenbacher@gmail.com>.