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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
SETGID(3P) POSIX Programmer's Manual SETGID(3P)
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.
setgid — set-group-ID
#include <unistd.h>
int setgid(gid_t gid);
If the process has appropriate privileges, setgid() shall set the
real group ID, effective group ID, and the saved set-group-ID of the
calling process to gid.
If the process does not have appropriate privileges, but gid is equal
to the real group ID or the saved set-group-ID, setgid() shall set
the effective group ID to gid; the real group ID and saved set-group-
ID shall remain unchanged.
The setgid() function shall not affect the supplementary group list
in any way.
Any supplementary group IDs of the calling process shall remain
unchanged.
Upon successful completion, 0 is returned. Otherwise, −1 shall be
returned and errno set to indicate the error.
The setgid() function shall fail if:
EINVAL The value of the gid argument is invalid and is not supported
by the implementation.
EPERM The process does not have appropriate privileges and gid does
not match the real group ID or the saved set-group-ID.
The following sections are informative.
None.
None.
Refer to the RATIONALE section in setuid(3p).
None.
exec(1p), getegid(3p), geteuid(3p), getgid(3p), getuid(3p),
setegid(3p), seteuid(3p), setregid(3p), setreuid(3p), setuid(3p)
The Base Definitions volume of POSIX.1‐2008, sys_types.h(0p),
unistd.h(0p)
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 SETGID(3P)
Pages that refer to this page: unistd.h(0p), getegid(3p), geteuid(3p), getgid(3p), getgroups(3p), getuid(3p), setegid(3p), seteuid(3p), setregid(3p), setreuid(3p), setuid(3p)