From c4ea2a195ca29a4833a9b70a7b6d17b0bca16341 Mon Sep 17 00:00:00 2001
From: Ben Gras <ben@minix3.org>
Date: Tue, 2 Aug 2011 19:22:08 +0200
Subject: [PATCH] getsid() implementation

---
 common/include/minix/callnr.h        |  4 +++-
 common/include/minix/com.h           |  3 +++
 lib/nbsd_libc/sys-minix/Makefile.inc |  2 +-
 lib/nbsd_libc/sys-minix/getsid.c     | 14 ++++++++++++++
 servers/pm/getset.c                  | 12 +++++++++++-
 servers/pm/table.c                   |  1 +
 servers/vfs/table.c                  |  1 +
 7 files changed, 34 insertions(+), 3 deletions(-)
 create mode 100644 lib/nbsd_libc/sys-minix/getsid.c

diff --git a/common/include/minix/callnr.h b/common/include/minix/callnr.h
index 9b58f0fbb..0236fcf04 100644
--- a/common/include/minix/callnr.h
+++ b/common/include/minix/callnr.h
@@ -1,4 +1,4 @@
-#define NCALLS		 113	/* number of system calls allowed */
+#define NCALLS		 114	/* number of system calls allowed */
 
 #define EXIT		   1 
 #define FORK		   2 
@@ -120,6 +120,8 @@
 #define FSTAT		66
 #define LSTAT		67
 
+#define PM_GETSID	113	/* PM getsid() */
+
 #define TASK_REPLY	121	/* to VFS: reply code from drivers, not 
 				 * really a standalone call.
 				 */
diff --git a/common/include/minix/com.h b/common/include/minix/com.h
index ca10ec6ae..342bd0ba1 100644
--- a/common/include/minix/com.h
+++ b/common/include/minix/com.h
@@ -260,6 +260,9 @@
 #define STATVFS_LEN m1_i1
 #define STATVFS_NAME m1_p1
 #define STATVFS_BUF m1_p2
+
+#define PM_GETSID_PID	m1_i1
+
 /*===========================================================================*
  *                  	   Messages for networking layer		     *
  *===========================================================================*/
diff --git a/lib/nbsd_libc/sys-minix/Makefile.inc b/lib/nbsd_libc/sys-minix/Makefile.inc
index ee855cc46..3442c9385 100644
--- a/lib/nbsd_libc/sys-minix/Makefile.inc
+++ b/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 \
diff --git a/lib/nbsd_libc/sys-minix/getsid.c b/lib/nbsd_libc/sys-minix/getsid.c
new file mode 100644
index 000000000..c4505fcc1
--- /dev/null
+++ b/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));
+}
diff --git a/servers/pm/getset.c b/servers/pm/getset.c
index f826c080d..daf5b797f 100644
--- a/servers/pm/getset.c
+++ b/servers/pm/getset.c
@@ -18,7 +18,7 @@
  *===========================================================================*/
 PUBLIC int do_get()
 {
-/* Handle GETUID, GETGID, GETPID, GETPGRP.
+/* Handle GETUID, GETGID, GETPID, GETPGRP, GETSID.
  */
 
   register struct mproc *rmp = mp;
@@ -68,6 +68,16 @@ PUBLIC int do_get()
 		r = rmp->mp_procgrp;
 		break;
 
+	case PM_GETSID:
+	{
+		struct mproc *target;
+		pid_t p = m_in.PM_GETSID_PID;
+		target = p ? find_proc(p) : &mproc[who_p];
+		r = ESRCH;
+		if(target)
+			r = target->mp_procgrp;
+		break;
+	}
 	default:
 		r = EINVAL;
 		break;	
diff --git a/servers/pm/table.c b/servers/pm/table.c
index 444455dc2..6a69002ec 100644
--- a/servers/pm/table.c
+++ b/servers/pm/table.c
@@ -125,6 +125,7 @@ _PROTOTYPE (int (*call_vec[]), (void) ) = {
 	do_getdma,	/* 110 = getdma */
 	do_srv_kill,	/* 111 = srv_kill */
  	no_sys, 	/* 112 = gcov_flush */
+	do_get,		/* 113 = getsid	*/
 };
 /* This should not fail with "array size is negative": */
 extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
diff --git a/servers/vfs/table.c b/servers/vfs/table.c
index 5385e7b14..0f05fd528 100644
--- a/servers/vfs/table.c
+++ b/servers/vfs/table.c
@@ -129,6 +129,7 @@ PUBLIC _PROTOTYPE (int (*call_vec[]), (void) ) = {
 	no_sys,		/* 110 = (getdma) */
 	no_sys,		/* 111 = (srv_kill) */
 	do_gcov_flush,	/* 112 = gcov_flush */
+	no_sys,		/* 113 = (getsid) */
 };
 /* This should not fail with "array size is negative": */
 extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];
-- 
2.44.0