From ecc8a52f8259d58fe5ccc66e7a28502f54ced094 Mon Sep 17 00:00:00 2001
From: Thomas Veerman <thomas@minix3.org>
Date: Thu, 15 Jul 2010 13:24:57 +0000
Subject: [PATCH] Add getnucred system call. Contributed by Thomas Cort

---
 include/minix/com.h           |  3 +++
 lib/libc/other/Makefile.inc   |  1 +
 lib/libc/other/_getnucred.c   | 29 +++++++++++++++++++++++++++++
 lib/libc/syscall/Makefile.inc |  1 +
 lib/libc/syscall/getnucred.S  |  7 +++++++
 5 files changed, 41 insertions(+)
 create mode 100644 lib/libc/other/_getnucred.c
 create mode 100644 lib/libc/syscall/getnucred.S

diff --git a/include/minix/com.h b/include/minix/com.h
index 8596ba853..16526b20d 100644
--- a/include/minix/com.h
+++ b/include/minix/com.h
@@ -876,6 +876,9 @@
 #define PM_ENDPT				m1_i1
 #define PM_PENDPT				m1_i2
 
+#define PM_NUID					m2_i1
+#define PM_NGID					m2_i2
+
 /* Field names for GETSYSINFO_UP (PM). */
 #define SIU_WHAT	m2_i1
 #define SIU_LEN		m2_i2
diff --git a/lib/libc/other/Makefile.inc b/lib/libc/other/Makefile.inc
index 14a63ab78..ffe2a0bef 100644
--- a/lib/libc/other/Makefile.inc
+++ b/lib/libc/other/Makefile.inc
@@ -13,6 +13,7 @@ SRCS+=  \
 	_getdents.c \
 	_getdma.c \
 	_getnpid.c \
+	_getnucred.c \
 	_getnuid.c \
 	_getngid.c \
 	_getnprocnr.c \
diff --git a/lib/libc/other/_getnucred.c b/lib/libc/other/_getnucred.c
new file mode 100644
index 000000000..4c71aa70f
--- /dev/null
+++ b/lib/libc/other/_getnucred.c
@@ -0,0 +1,29 @@
+#include <lib.h>
+#define getnucred	_getnucred
+#include <errno.h>
+#include <sys/ucred.h>
+#include <unistd.h>
+
+PUBLIC int getnucred(endpoint_t proc_ep, struct ucred *ucred)
+{
+  message m;
+  pid_t pid;
+
+  if (ucred == NULL) {
+    errno = EFAULT;
+    return -1;
+  }
+
+  m.m1_i1 = proc_ep;		/* search for this process */
+
+  pid = _syscall(PM_PROC_NR, GETEPINFO, &m);
+  if (pid < 0) {
+     return -1;
+  }
+
+  ucred->pid = pid;
+  ucred->uid = m.PM_NUID;
+  ucred->gid = m.PM_NGID;
+
+  return 0;
+}
diff --git a/lib/libc/syscall/Makefile.inc b/lib/libc/syscall/Makefile.inc
index f0d177fb0..05ed54ebf 100644
--- a/lib/libc/syscall/Makefile.inc
+++ b/lib/libc/syscall/Makefile.inc
@@ -46,6 +46,7 @@ SRCS+=  \
 	getgroups.S \
 	getitimer.S \
 	getnpid.S \
+	getnucred.S \
 	getnuid.S \
 	getngid.S \
 	getnprocnr.S \
diff --git a/lib/libc/syscall/getnucred.S b/lib/libc/syscall/getnucred.S
new file mode 100644
index 000000000..4e436e649
--- /dev/null
+++ b/lib/libc/syscall/getnucred.S
@@ -0,0 +1,7 @@
+.text
+.extern	__getnucred
+.globl	_getnucred
+.balign	2
+
+_getnucred:
+	jmp	__getnucred
-- 
2.44.0