posix_setgid(3) [php man page]

POSIX_SETGID(3) 							 1							   POSIX_SETGID(3)

posix_setgid - Set the GID of the current process

SYNOPSIS

       bool posix_setgid (int  $gid)

DESCRIPTION

	Set  the real group ID of the current process. This is a privileged function and needs appropriate privileges (usually root) on the system
       to be able to perform this function. The appropriate order of function calls is posix_setgid(3) first, posix_setuid(3) last.

       Note

	       If the caller is a super user, this will also set the effective group id.

PARAMETERS

	      o $gid
		- The group id.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      posix_setgid(3) example

	       This example will print out the effective group id, once it is changed.

	      <?php
	      echo 'My real group id is '.posix_getgid(); //20
	      posix_setgid(40);
	      echo 'My real group id is '.posix_getgid(); //40
	      echo 'My effective group id is '.posix_getegid(); //40
	      ?>

SEE ALSO

       posix_getgrgid(3), posix_getgid(3).

PHP Documentation Group 													   POSIX_SETGID(3)

POSIX_GETGRGID(3)							 1							 POSIX_GETGRGID(3)

posix_getgrgid - Return info about a group by group id

SYNOPSIS

       array posix_getgrgid (int  $gid)

DESCRIPTION

	Gets information about a group provided its id.

PARAMETERS

	      o $gid
		- The group id.

RETURN VALUES

	The array elements returned are:

       The group information array

       +--------+---------------------------------------------------+
       |Element |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | name	|						    |
       |	|						    |
       |	|  The name element contains the name of the group. |
       |	| This is a short, usually less than  16  character |
       |	| "handle" of the group, not the real, full name.   |
       |	|						    |
       |passwd	|						    |
       |	|						    |
       |	|  The passwd element contains the group's password |
       |	| in an encrypted format. Often, for example  on  a |
       |	| system  employing "shadow" passwords, an asterisk |
       |	| is returned instead.				    |
       |	|						    |
       |  gid	|						    |
       |	|						    |
       |	|  Group ID, should be the same as the $gid parame- |
       |	| ter  used  when  calling  the function, and hence |
       |	| redundant.					    |
       |	|						    |
       |members |						    |
       |	|						    |
       |	|  This consists of an array of  string's  for	all |
       |	| the members in the group.			    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      Example use of posix_getgrgid(3)

	      <?php

	      $groupid	 = posix_getegid();
	      $groupinfo = posix_getgrgid($groupid);

	      print_r($groupinfo);
	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [name]    => toons
		  [passwd]  => x
		  [members] => Array
		      (
			  [0] => tom
			  [1] => jerry
		      )
		  [gid]     => 42
	      )

SEE ALSO

       posix_getegid(3), posix_getgrnam(3), filegroup(3), stat(3), safe_mode_gid, POSIX man page GETGRNAM(3).

PHP Documentation Group 													 POSIX_GETGRGID(3)