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GETGID(2)		      System Calls Manual		     GETGID(2)

NAME
       getgid, getegid -- get group process identification

LIBRARY
       Standard	C Library (libc, -lc)

SYNOPSIS
       #include	<unistd.h>

       gid_t
       getgid(void);

       gid_t
       getegid(void);

DESCRIPTION
       The  getgid()  system  call  returns  the  real group ID	of the calling
       process,	getegid() returns  the	effective  group  ID  of  the  calling
       process.

       The real	group ID is specified at login time.

       The real	group ID is the	group of the user who invoked the program.  As
       the  effective group ID gives the process additional permissions	during
       the execution of	"set-group-ID" mode processes, getgid()	is used	to de-
       termine the real-user-id	of the calling process.

ERRORS
       The getgid() and	getegid() system calls are always successful,  and  no
       return value is reserved	to indicate an error.

SEE ALSO
       getuid(2), issetugid(2),	setgid(2), setregid(2)

STANDARDS
       The  getgid()  and  getegid()  system  calls are	expected to conform to
       ISO/IEC 9945-1:1990 ("POSIX.1").

HISTORY
       The getgid() function appeared in Version 4 AT&T	UNIX.

FreeBSD	13.2			  May 1, 2020			     GETGID(2)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | SEE ALSO | STANDARDS | HISTORY

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