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

getuid(2), setregid(2), setgid(3)

STANDARDS

getgid() and getegid() conform to IEEE Std 1003.1-1988 (“POSIX.1”).