getegid2
Get group process identification
Part of getgid(2).
Usage
#include <unistd.h>
gid_t
getegid(void);
gid_t
getgid(void);
Overview
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.
Releases
153 releases since Mac OS X 10.1; the text changed 2 times.