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setgid(3p) — Linux manual page

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

SETGID(3P)              POSIX Programmer's ManualSETGID(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_tgid);

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 togid.       If the process does not have appropriate privileges, butgid is       equal to the real group ID or the saved set-group-ID,setgid()       shall set the effective group ID togid; the real group ID and       saved set-group-ID shall remain unchanged.       Thesetgid() 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 anderrno set to indicate the error.

ERRORS top

       Thesetgid() function shall fail if:EINVALThe value of thegid argument is invalid and is not              supported by the implementation.EPERMThe process does not have appropriate privileges andgid              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 insetuid(3p).

FUTURE DIRECTIONS top

       None.

COPYRIGHT top

       Portions of this text are reprinted and reproduced in electronic       form from IEEE Std 1003.1-2017, Standard for Information       Technology -- Portable Operating System Interface (POSIX), The       Open Group Base Specifications Issue 7, 2018 Edition, Copyright       (C) 2018 by the Institute of Electrical and Electronics Engineers,       Inc and The Open Group.  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 athttp://www.opengroup.org/unix/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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017SETGID(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)