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Linux ACL
March 23, 2002


Access control list utilities, libraries and headers


access control list - static libraries and headers


Files needed for building programs with libacl


acl_to_text - convert an ACL to text


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


.In sys/types.h
.In sys/acl.h char * acl_to_text acl_t acl ssize_t *len_p


The acl_to_text function translates the ACL pointed to by the argument acl into a NULL terminated character string. If the pointer len_p is not NULL, then the function returns the length of the string (not including the NULL terminator) in the location pointed to by len_p. The format of the text string returned by acl_to_text is the long text form defined in acl(5). 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(3) with the (void*)char returned by acl_to_text as an argument.


On success, this function returns a pointer to the long text form of the ACL. On error, a value of (char *)NULL is returned, and errno is set appropriately.


If any of the following conditions occur, the acl_to_text function returns a value of (char *)NULL and sets errno to the corresponding value:
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 a text form of an ACL.
The character string to be returned requires more memory than is allowed by the hardware or system-imposed memory management constraints.


IEEE Std 1003.1e draft 17 (\(lqPOSIX.1e\(rq, abandoned)


Derived from the FreeBSD manual pages written by
.An Robert N M Watson Aq , and adapted for Linux by
.An Andreas Gruenbacher Aq .
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