PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

SETGID(3P)                POSIX Programmer's Manual               SETGID(3P)

PROLOG         top

       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.

NAME         top

       setgid — set-group-ID

SYNOPSIS         top

       #include <unistd.h>

       int setgid(gid_t gid);

DESCRIPTION         top

       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.

RETURN VALUE         top

       Upon successful completion, 0 is returned. Otherwise, −1 shall be
       returned and errno set to indicate the error.

ERRORS         top

       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.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       Refer to the RATIONALE section in setuid(3p).

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       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)

COPYRIGHT         top

       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)