Add some basic setgroups(), getgroups() and initgroups().

Also teach /bin/id to print the user's supplemental groups.

1 files changed, 2 insertions, 0 deletions

diff --git a/LibC/unistd.h b/LibC/unistd.h
index d16663140c..81e9146ae8 100644
--- a/LibC/unistd.h
+++ b/LibC/unistd.h
@@ -21,6 +21,8 @@ gid_t getegid();
 uid_t getuid();
 gid_t getgid();
 pid_t getpid();
+int getgroups(int size, gid_t list[]);
+int setgroups(size_t, const gid_t*);
 pid_t tcgetpgrp(int fd);
 int tcsetpgrp(int fd, pid_t pgid);
 int open(const char* path, int options, ...);