[vala/staging] linux: add getgroups(2), setgroups(2), getresgid(2), getresuid(2), setresgid(2), setresuid(2)

[Dr. Michael Lauer <mlauer src gnome org>]

commit b036f2ca59a8fd9d79da54627cd769a3e9fc861b
Author: Dr. Michael Lauer <mickey vanille-media de>
Date:   Wed Mar 7 10:41:51 2018 +0100

    linux: add getgroups(2), setgroups(2), getresgid(2), getresuid(2), setresgid(2), setresuid(2)
    
    Based on a VAPI by Colin Watson.

 vapi/linux.vapi |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/vapi/linux.vapi b/vapi/linux.vapi
index f1f8573..42a7fc4 100644
--- a/vapi/linux.vapi
+++ b/vapi/linux.vapi
@@ -1061,6 +1061,20 @@ namespace Linux {
 
     [CCode (cheader_filename = "unistd.h", feature_test_macro = "_GNU_SOURCE")]
     public int dup3 (int oldfd, int newfd, int flags);
+
+    [CCode (cheader_filename = "sys/types.h,unistd.h")]
+    public int getgroups ([CCode (array_length_pos = 0.9)] Posix.gid_t[]? list = null);
+    [CCode (cheader_filename = "unistd.h", feature_test_macro = "_GNU_SOURCE")]
+    public int getresgid (out Posix.gid_t rgid, out Posix.gid_t egid, out Posix.gid_t sgid);
+    [CCode (cheader_filename = "unistd.h", feature_test_macro = "_GNU_SOURCE")]
+    public int getresuid (out Posix.uid_t ruid, out Posix.uid_t euid, out Posix.uid_t suid);
+    [CCode (cheader_filename = "sys/types.h,grp.h,unistd.h")]
+    public int setgroups ([CCode (array_length_pos = 0.9)] Posix.gid_t[] list);
+    [CCode (cheader_filename = "unistd.h", feature_test_macro = "_GNU_SOURCE")]
+    public int setresgid (Posix.gid_t rgid, Posix.gid_t egid, Posix.gid_t sgid);
+    [CCode (cheader_filename = "unistd.h", feature_test_macro = "_GNU_SOURCE")]
+    public int setresuid (Posix.uid_t ruid, Posix.uid_t euid, Posix.uid_t suid);
+
     [CCode (cheader_filename = "unistd.h")]
     public int sethostname (string name, size_t len);