getsid() implementation

lib/nbsd_libc/sys-minix/Makefile.inc

@@ -1,6 +1,6 @@
 .PATH:	${.CURDIR}/sys-minix
 
-SRCS+= 	accept.c access.c bind.c brk.c sbrk.c m_closefrom.c compat.S \
+SRCS+= 	accept.c access.c bind.c brk.c sbrk.c m_closefrom.c getsid.c compat.S \
 	chdir.c chmod.c fchmod.c chown.c fchown.c chroot.c close.c \
 	connect.c dup.c dup2.c execve.c fcntl.c flock.c fpathconf.c fork.c \
 	fstatfs.c fstatvfs.c fsync.c ftruncate.c getdents.c getegid.c getgid.c \

lib/nbsd_libc/sys-minix/getsid.c

@@ -0,0 +1,14 @@
+#include <sys/cdefs.h>
+#include <lib.h>
+#include "namespace.h"
+
+#include <unistd.h>
+
+pid_t getsid(pid_t p)
+{
+  message m;
+
+  memset(&m, 0, sizeof(m));
+  m.PM_GETSID_PID = p;
+  return(_syscall(PM_PROC_NR, PM_GETSID, &m));
+}