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79 lines
2.4 KiB
Plaintext
79 lines
2.4 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "SETGID" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" setgid
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.SH NAME
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setgid \- set-group-ID
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.SH SYNOPSIS
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.LP
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\fB#include <unistd.h>
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.br
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.sp
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int setgid(gid_t\fP \fIgid\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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If the process has appropriate privileges, \fIsetgid\fP() shall set
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the real group ID, effective group ID, and the saved
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set-group-ID of the calling process to \fIgid\fP.
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.LP
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If the process does not have appropriate privileges, but \fIgid\fP
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is equal to the real group ID or the saved set-group-ID,
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\fIsetgid\fP() shall set the effective group ID to \fIgid\fP; the
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real group ID and saved set-group-ID shall remain
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unchanged.
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.LP
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The \fIsetgid\fP() function shall not affect the supplementary group
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list in any way.
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.LP
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Any supplementary group IDs of the calling process shall remain unchanged.
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.SH RETURN VALUE
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.LP
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Upon successful completion, 0 is returned. Otherwise, -1 shall be
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returned and \fIerrno\fP set to indicate the error.
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.SH ERRORS
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.LP
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The \fIsetgid\fP() function shall fail if:
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.TP 7
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.B EINVAL
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The value of the \fIgid\fP argument is invalid and is not supported
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by the implementation.
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.TP 7
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.B EPERM
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The process does not have appropriate privileges and \fIgid\fP does
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not match the real group ID or the saved
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set-group-ID.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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Refer to the RATIONALE section in \fIsetuid\fP() .
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIexec\fP() , \fIgetegid\fP() , \fIgeteuid\fP() , \fIgetgid\fP()
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, \fIgetuid\fP() ,
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\fIsetegid\fP() , \fIseteuid\fP() , \fIsetregid\fP() , \fIsetreuid\fP()
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, \fIsetuid\fP() ,
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the Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<sys/types.h>\fP,
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\fI<unistd.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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