SETUID.2
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C/C++
- ." Copyright (c) 1980 Regents of the University of California.
- ." All rights reserved. The Berkeley software License Agreement
- ." specifies the terms and conditions for redistribution.
- ."
- ." @(#)setreuid.2 6.1 (Berkeley) 5/9/85
- ."
- .TH SETUID 2 "May 9, 1985"
- .UC 4
- .SH NAME
- setuid, setgid - set user or group ID's
- .SH SYNOPSIS
- .nf
- .ft B
- #include <sys/types.h>
- int setuid(uid_t fIuidfP)
- int setgid(gid_t fIgidfP)
- .ft R
- .fi
- .SH DESCRIPTION
- .B Setuid
- sets the real and effective user ID's of the
- current process to
- .IR uid .
- Unprivileged users may only change both user ID's
- to the real user ID; only the super-user may
- make other changes.
- .B Setgid
- does the same for the real and effective group ID's.
- .PP
- Minix-vmd
- allows an unprivileged user to change ID's to the original real or effective
- ID as they were at the time the process was executed.
- .B Setgid
- may also set the group ID's to any of the additional group ID's.
- If one of the
- remembered user ID's was 0 then any user or group ID may be chosen.
- .SH "RETURN VALUE
- Upon successful completion, a value of 0 is returned. Otherwise,
- a value of -1 is returned and fBerrnofP is set to indicate the error.
- .SH "ERRORS
- .TP 15
- [EPERM]
- The current process is not the super-user and a change
- other than one of the allowed changes was attempted.
- .SH "SEE ALSO"
- .BR getuid (2),
- .BR getgid (2).