setegid(3p) - phpMan

SETEGID(P)                                                          SETEGID(P)



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 call-
       ing  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 imple-
              mentation.

       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() .

FUTURE DIRECTIONS
       None.

SEE ALSO
       exec()  ,  getegid()  ,  geteuid()  ,  getgid() , getuid() , seteuid() , setgid() ,
       setregid()  ,  setreuid()  ,  setuid()   ,   the   Base   Definitions   volume   of
       IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information  Technology  --  Portable  Operating
       System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C)
       2001-2003 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 .



POSIX                                2003                           SETEGID(P)

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