setegid(3p) — Linux manual page

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

PROLOG

       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

       setegid — set the effective group ID

SYNOPSIS

       #include <unistd.h>

       int setegid(gid_t gid);

DESCRIPTION

       If gid is equal to the real group ID or the saved set-group-ID,
       or if the process has appropriate privileges, setegid() shall set
       the effective group ID of the calling process to gid; the real
       group ID, saved set-group-ID, and any supplementary group IDs
       shall remain unchanged.

       The setegid() function shall not affect the supplementary group
       list in any way.

RETURN VALUE

       Upon successful completion, 0 shall be returned; otherwise, -1
       shall be returned and errno set to indicate the error.

ERRORS

       The setegid() 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

       None.

APPLICATION USAGE

       None.

RATIONALE

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

FUTURE DIRECTIONS

       None.

SEE ALSO

       exec(1p), getegid(3p), geteuid(3p), getgid(3p), getuid(3p),
       seteuid(3p), setgid(3p), setregid(3p), setreuid(3p), setuid(3p)

       The Base Definitions volume of POSIX.1‐2017, sys_types.h(0p),
       unistd.h(0p)

COPYRIGHT

       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 at http://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, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                       SETEGID(3P)

Pages that refer to this page: unistd.h(0p), getegid(3p), geteuid(3p), getgid(3p), getuid(3p), seteuid(3p), setgid(3p), setregid(3p), setreuid(3p), setuid(3p)

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