getuid.2 revision 256281
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@(#)getuid.2 8.1 (Berkeley) 6/4/93
$FreeBSD: stable/10/lib/libc/sys/getuid.2 165903 2007-01-09 00:28:16Z imp $
.Dd June 4, 1993 .Dt GETUID 2 .Os .Sh NAME .Nm getuid , .Nm geteuid .Nd get user identification .Sh LIBRARY .Lb libc .Sh SYNOPSIS n unistd.h n sys/types.h .Ft uid_t .Fn getuid void .Ft uid_t .Fn geteuid void .Sh DESCRIPTION The .Fn getuid system call returns the real user ID of the calling process. The .Fn geteuid system call returns the effective user ID of the calling process.
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)getuid.2 8.1 (Berkeley) 6/4/93
$FreeBSD: stable/10/lib/libc/sys/getuid.2 165903 2007-01-09 00:28:16Z imp $
.Dd June 4, 1993 .Dt GETUID 2 .Os .Sh NAME .Nm getuid , .Nm geteuid .Nd get user identification .Sh LIBRARY .Lb libc .Sh SYNOPSIS n unistd.h n sys/types.h .Ft uid_t .Fn getuid void .Ft uid_t .Fn geteuid void .Sh DESCRIPTION The .Fn getuid system call returns the real user ID of the calling process. The .Fn geteuid system call returns the effective user ID of the calling process.
p The real user ID is that of the user who has invoked the program. As the effective user ID gives the process additional permissions during execution of .Dq Em set-user-ID mode processes, .Fn getuid is used to determine the real-user-id of the calling process. .Sh ERRORS The .Fn getuid and .Fn geteuid system calls are always successful, and no return value is reserved to indicate an error. .Sh SEE ALSO .Xr getgid 2 , .Xr issetugid 2 , .Xr setgid 2 , .Xr setreuid 2 , .Xr setuid 2 .Sh STANDARDS The .Fn geteuid and .Fn getuid system calls are expected to conform to .St -p1003.1-90 . .Sh HISTORY The .Fn getuid and .Fn geteuid functions appeared in .At v7 .