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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (C) 2007 Michael Kerrisk <mtk-manpages@gmx.net>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\"
.TH EUIDACCESS 3 2007-05-18 "" "Linux Programmer's Manual"
.SH NAME
euidaccess, eaccess \- check effective user's permissions for a file
.SH SYNOPSIS
.nf
.B #include <unistd.h>
.sp
.BI "int euidaccess(const char *" pathname ", int " mode );
.BI "int eaccess(const char *" pathname ", int " mode );
.fi
.SH DESCRIPTION
Like
.BR access (2),
.BR euidaccess ()
checks permissions and existence of the file identified by its argument
.IR pathname .
However, whereas
.BR access (2),
performs checks using the real user and group identifiers of the process,
.BR euidaccess ()
uses the effective identifiers.
.I mode
is a mask consisting of one or more of
.BR R_OK ", " W_OK ", " X_OK " and " F_OK ,
with the same meanings as for
.BR access (2).
.BR eaccess ()
is a synonym for
.BR euidaccess (),
provided for compatibility with some other systems.
.SH "RETURN VALUE"
On success (all requested permissions granted), zero is returned.
On error (at least one bit in
.I mode
asked for a permission that is denied, or some other error occurred),
\-1 is returned, and
.I errno
is set appropriately.
.SH ERRORS
As for
.BR access (2).
.SH "CONFORMING TO"
These functions are non-standard.
Some other systems have an
.\" e.g., FreeBSD 6.1.
.BR eaccess ()
function.
.SH NOTES
.SS Glibc Notes
The
.BR eaccess ()
function was added to glibc in version 2.4.
.SH "SEE ALSO"
.BR access (2),
.\" FIXME add SEE ALSO in access.2 referring to this page
.BR chmod (2),
.BR chown (2),
.\" FIXME add SEE ALSO in faccessat.2 referring to this page
.BR faccessat (2),
.BR open (2),
.BR path_resolution (2),
.BR setgid (2),
.BR setuid (2),
.BR stat (2)
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