Provided by: manpages-dev_3.54-1ubuntu1_all
getgid, getegid - get group identity
#include <unistd.h> #include <sys/types.h> gid_t getgid(void); gid_t getegid(void);
getgid() returns the real group ID of the calling process. getegid() returns the effective group ID of the calling process.
These functions are always successful.
The original Linux getgid() and getegid() system calls supported only 16-bit group IDs. Subsequently, Linux 2.4 added getgid32() and getegid32(), supporting 32-bit IDs. The glibc getgid() and getegid() wrapper functions transparently deal with the variations across kernel versions.
getresgid(2), setgid(2), setregid(2), credentials(7)
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