GETGID(2) System Calls Manual GETGID(2)

getegid, getgidget group process identification

#include <unistd.h>

gid_t
getegid(void);

gid_t
getgid(void);

The () function returns the real group ID of the calling process, () 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 “” mode processes, () is used to determine the real-user-id of the calling process.

The getgid() and getegid() functions are always successful; no return value is reserved to indicate an error.

#include <sys/types.h> #include <unistd.h>

The include file <sys/types.h> is necessary.

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

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

June 4, 1993 BSD 4.2