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ACL_TO_ANY_TEXT

Section: C Library Functions (3)
Index Return to Main Contents

BSD mandoc
Linux ACL  

NAME

acl_to_any_text - convert an ACL to text  

LIBRARY

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

SYNOPSIS

In sys/types.h In acl/libacl.h Ft char * Fo acl_to_any_text Fa acl_t acl Fa const char *prefix Fa char separator Fa int options Fc  

DESCRIPTION

The Fn 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 Fn acl_free with the (void*)char returned by Fn 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 Fn acl_to_any_text function returns a value of (char *)NULL and sets errno to the corresponding value:

Bq Er 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.

Bq Er 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 (lqPOSIX.1erq, abandoned).  

SEE ALSO

acl_from_text3, acl_to_text3, acl_free3, acl(5)  

AUTHOR

Written by An Andreas Gruenbacher Aq a.gruenbacher@bestbits.at .


 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
STANDARDS
SEE ALSO
AUTHOR


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