1SETEUID(3P)                POSIX Programmer's Manual               SETEUID(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       seteuid - set effective user ID
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SYNOPSIS

15       #include <unistd.h>
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17       int seteuid(uid_t uid);
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DESCRIPTION

21       If uid is equal to the real user ID or the saved set-user-ID, or if the
22       process  has  appropriate privileges, seteuid() shall set the effective
23       user ID of the calling process to uid; the real user ID and saved  set-
24       user-ID shall remain unchanged.
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26       The seteuid() function shall not affect the supplementary group list in
27       any way.
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RETURN VALUE

30       Upon successful completion, 0 shall be returned; otherwise, -1 shall be
31       returned and errno set to indicate the error.
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ERRORS

34       The seteuid() function shall fail if:
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36       EINVAL The value of the uid argument is invalid and is not supported by
37              the implementation.
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39       EPERM  The process does not have appropriate privileges  and  uid  does
40              not match the real group ID or the saved set-group-ID.
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43       The following sections are informative.
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EXAMPLES

46       None.
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APPLICATION USAGE

49       None.
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RATIONALE

52       Refer to the RATIONALE section in setuid().
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FUTURE DIRECTIONS

55       None.
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SEE ALSO

58       exec(),  getegid(), geteuid(), getgid(), getuid(), setegid(), setgid(),
59       setregid(),  setreuid(),  setuid(),  the  Base  Definitions  volume  of
60       IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>
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63       Portions  of  this text are reprinted and reproduced in electronic form
64       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
65       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
66       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
67       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
68       event of any discrepancy between this version and the original IEEE and
69       The  Open Group Standard, the original IEEE and The Open Group Standard
70       is the referee document. The original Standard can be  obtained  online
71       at http://www.opengroup.org/unix/online.html .
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75IEEE/The Open Group                  2003                          SETEUID(3P)
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