SETEUID(P) POSIX Programmer's Manual SETEUID(P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEseteuid - set effective user ID
SYNOPSIS
#include <unistd.h>
int seteuid(uid_t uid);
DESCRIPTION
If uid is equal to the real user ID or the saved set-user-ID, or if the
process has appropriate privileges, seteuid() shall set the effective
user ID of the calling process to uid; the real user ID and saved set-
user-ID shall remain unchanged.
The seteuid() function shall not affect the supplementary group list in
any way.
RETURN VALUE
Upon successful completion, 0 shall be returned; otherwise, -1 shall be
returned and errno set to indicate the error.
ERRORS
The seteuid() function shall fail if:
EINVAL The value of the uid argument is invalid and is not supported by
the implementation.
EPERM The process does not have appropriate privileges and uid does
not match the real group ID or the saved set-group-ID.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
Refer to the RATIONALE section in setuid() .
FUTURE DIRECTIONS
None.
SEE ALSOexec() , getegid() , geteuid() , getgid() , getuid() , setegid() , set‐
gid() , setregid() , setreuid() , setuid() , the Base Definitions vol‐
ume of IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 SETEUID(P)
