NAME
getegid, getgid
— get group process
identification
SYNOPSIS
#include
<unistd.h>
gid_t
getegid(void);
gid_t
getgid(void);
DESCRIPTION
The
getgid()
function 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 determine the real-user-id of the calling process.
ERRORS
The getgid() and
getegid() functions are always successful; no return
value is reserved to indicate an error.
LEGACY SYNOPSIS
#include
<sys/types.h> #include
<unistd.h>
The include file
<sys/types.h> is
necessary.
SEE ALSO
STANDARDS
getgid() and
getegid() conform to IEEE Std
1003.1-1988 (“POSIX.1”).