* Added real, effective and saved set- user and group IDs to the team

structure. They are properly inherited and updated on
  fork(), load_image(), and exec().
* Implemented the get[e]{u,g}id(), set[[r]e]{u,g}id() family for real.
* getgroups() also calls the kernel now, but only returns the effective
  group ID. Supplementary groups support is still missing.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24359 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/unistd.h

@@ -159,13 +159,15 @@ extern pid_t	setpgrp(void);
 extern gid_t	getegid(void);
 extern uid_t	geteuid(void);
 extern gid_t	getgid(void);
-extern int		getgroups(int groupSize, gid_t groupList[]);
 extern uid_t	getuid(void);
+extern int		getgroups(int groupSize, gid_t groupList[]);
 
 extern int		setgid(gid_t gid);
 extern int		setuid(uid_t uid);
 extern int		setegid(gid_t gid);
 extern int		seteuid(uid_t uid);
+extern int		setregid(gid_t rgid, gid_t egid);
+extern int		setreuid(uid_t ruid, uid_t euid);
 
 extern char		*getlogin(void);
 extern int		getlogin_r(char *name, size_t nameSize);

headers/private/kernel/syscalls.h

@@ -113,6 +113,15 @@ extern status_t		_kern_get_team_info(team_id id, team_info *info);
 extern status_t		_kern_get_next_team_info(int32 *cookie, team_info *info);
 extern status_t		_kern_get_team_usage_info(team_id team, int32 who, team_usage_info *info, size_t size);
 
+// user/group functions
+extern gid_t		_kern_getgid(bool effective);
+extern uid_t		_kern_getuid(bool effective);
+extern ssize_t		_kern_getgroups(int groupSize, gid_t* groupList);
+extern status_t		_kern_setregid(gid_t rgid, gid_t egid,
+						bool setAllIfPrivileged);
+extern status_t		_kern_setreuid(uid_t ruid, uid_t euid,
+						bool setAllIfPrivileged);
+
 // signal functions
 extern status_t		_kern_send_signal(pid_t tid, uint sig);
 extern status_t		_kern_sigprocmask(int how, const sigset_t *set,

headers/private/kernel/thread_types.h

@@ -189,6 +189,13 @@ struct team {
 
 	bigtime_t		dead_threads_kernel_time;
 	bigtime_t		dead_threads_user_time;
+
+	uid_t			saved_set_uid;
+	uid_t			real_uid;
+	uid_t			effective_uid;
+	gid_t			saved_set_gid;
+	gid_t			real_gid;
+	gid_t			effective_gid;
 };
 
 typedef int32 (*thread_entry_func)(thread_func, void *);

headers/private/kernel/usergroup.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_USERGROUP_H
+#define _KERNEL_USERGROUP_H
+
+#include <unistd.h>
+
+#include <SupportDefs.h>
+
+
+struct team;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// kernel private functions
+
+void		inherit_parent_user_and_group(struct team* team,
+				struct team* parent);
+status_t	update_set_id_user_and_group(struct team* team, const char* file);
+
+// syscalls
+
+gid_t		_user_getgid(bool effective);
+uid_t		_user_getuid(bool effective);
+ssize_t		_user_getgroups(int groupSize, gid_t* groupList);
+status_t	_user_setregid(gid_t rgid, gid_t egid, bool setAllIfPrivileged);
+status_t	_user_setreuid(uid_t ruid, uid_t euid, bool setAllIfPrivileged);
+
+#ifdef __cplusplus
+}	// extern "C"
+#endif
+
+
+#endif	// _KERNEL_USERGROUP_H