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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON |
ACL_GET_FD(3) BSD Library Functions Manual ACL_GET_FD(3)
acl_get_fd — get an ACL by file descriptor
Linux Access Control Lists library (libacl, -lacl).
#include <sys/types.h>
#include <sys/acl.h>
acl_t
acl_get_fd(int fd);
The acl_get_fd() function retrieves the access ACL associated with the
file referred to by fd. The ACL is placed into working storage and
acl_get_fd() returns a pointer to that storage.
In order to read an ACL from an object, a process must have read access
to the object's attributes.
This function may cause memory to be allocated. The caller should free
any releasable memory, when the new ACL is no longer required, by call‐
ing acl_free(3) with the (void*)acl_t returned by acl_get_fd() as an
argument.
On success, this function shall return a pointer to the working
storage. On error, a value of (acl_t)NULL shall be returned, and errno
is set appropriately.
If any of the following conditions occur, the acl_get_fd() function
returns a value of (acl_t)NULL and sets errno to the corresponding
value:
[EBADF] The fd argument is not a valid file descriptor.
[ENOMEM] The ACL working storage requires more memory than is
allowed by the hardware or system-imposed memory
management constraints.
[ENOTSUP] The file system on which the file identified by fd
is located does not support ACLs, or ACLs are dis‐
abled.
IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
acl_free(3), acl_get_entry(3), acl_get_file(3), acl_set_fd(3), acl(5)
Derived from the FreeBSD manual pages written by Robert N M Watson
<rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
<a.gruenbacher@bestbits.at>.
This page is part of the acl (manipulating access control lists)
project. Information about the project can be found at
http://savannah.nongnu.org/projects/acl. If you have a bug report for
this manual page, see http://savannah.nongnu.org/bugs/?group=acl. This
page was obtained from the project's upstream Git repository
git://git.savannah.nongnu.org/acl.git on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON (which
is not part of the original manual page), send a mail to
man-pages@man7.org
Linux ACL March 23, 2002 Linux ACL