From 1f945e8080b22572da1cabae9b0f0cfb4718b620 Mon Sep 17 00:00:00 2001
From: David van Moolenbroek <david@minix3.org>
Date: Sat, 1 Nov 2014 12:57:31 +0000
Subject: [PATCH] Fix fcntl(F_[GS]ETNOSIGPIPE) semantics

The new semantics should match those of NetBSD and other systems.

Change-Id: Ic9ca9d6b8c3e42d2a2953d9feea5f6bacaceb43c
---
 minix/lib/libc/sys/fcntl.c |  1 +
 minix/servers/vfs/misc.c   | 11 +++++------
 minix/tests/test68.c       | 16 ++++++++++------
 3 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/minix/lib/libc/sys/fcntl.c b/minix/lib/libc/sys/fcntl.c
index 10b99058f..e6f4e6786 100644
--- a/minix/lib/libc/sys/fcntl.c
+++ b/minix/lib/libc/sys/fcntl.c
@@ -23,6 +23,7 @@ int fcntl(int fd, int cmd, ...)
      case F_DUPFD:
      case F_SETFD:
      case F_SETFL:
+     case F_SETNOSIGPIPE:
 	m.m_lc_vfs_fcntl.arg_int = va_arg(argp, int);
 	break;
      case F_GETLK:
diff --git a/minix/servers/vfs/misc.c b/minix/servers/vfs/misc.c
index 8652007ca..429244c0b 100644
--- a/minix/servers/vfs/misc.c
+++ b/minix/servers/vfs/misc.c
@@ -214,14 +214,13 @@ int do_fcntl(void)
 	break;
      }
     case F_GETNOSIGPIPE:
-	/* POSIX: return value other than -1 is flag is set, else -1 */
-	r = -1;
-	if (f->filp_flags & O_NOSIGPIPE)
-		r = 0;
+	r = !!(f->filp_flags & O_NOSIGPIPE);
 	break;
     case F_SETNOSIGPIPE:
-	fl = (O_NOSIGPIPE);
-	f->filp_flags = (f->filp_flags & ~fl) | (fcntl_argx & fl);
+	if (fcntl_argx)
+		f->filp_flags |= O_NOSIGPIPE;
+	else
+		f->filp_flags &= ~O_NOSIGPIPE;
 	break;
     case F_FLUSH_FS_CACHE:
     {
diff --git a/minix/tests/test68.c b/minix/tests/test68.c
index 273117bce..99581677d 100644
--- a/minix/tests/test68.c
+++ b/minix/tests/test68.c
@@ -267,8 +267,8 @@ test_pipe_flag_setting()
 	if (fcntl(pipes[1], F_GETFD) != 0) e(3);
 	if (fcntl(pipes[0], F_GETFL) & O_NONBLOCK) e(4);
 	if (fcntl(pipes[1], F_GETFL) & O_NONBLOCK) e(5);
-	if (fcntl(pipes[0], F_GETNOSIGPIPE) != -1) e(6);
-	if (fcntl(pipes[1], F_GETNOSIGPIPE) != -1) e(7);
+	if (fcntl(pipes[0], F_GETNOSIGPIPE) != 0) e(6);
+	if (fcntl(pipes[1], F_GETNOSIGPIPE) != 0) e(7);
 	if (close(pipes[0]) != 0) e(8);
 	if (close(pipes[1]) != 0) e(9);
 
@@ -278,10 +278,14 @@ test_pipe_flag_setting()
 	if (fcntl(pipes[1], F_GETFD) != FD_CLOEXEC) e(12);
 	if (!(fcntl(pipes[0], F_GETFL) & O_NONBLOCK)) e(13);
 	if (!(fcntl(pipes[1], F_GETFL) & O_NONBLOCK)) e(14);
-	if (fcntl(pipes[0], F_GETNOSIGPIPE) == -1) e(15);
-	if (fcntl(pipes[1], F_GETNOSIGPIPE) == -1) e(16);
-	if (close(pipes[0]) != 0) e(17);
-	if (close(pipes[1]) != 0) e(18);
+	if (fcntl(pipes[0], F_GETNOSIGPIPE) == 0) e(15);
+	if (fcntl(pipes[1], F_GETNOSIGPIPE) == 0) e(16);
+	if (fcntl(pipes[0], F_SETNOSIGPIPE, 0) != 0) e(17);
+	if (fcntl(pipes[0], F_GETNOSIGPIPE) != 0) e(18);
+	if (fcntl(pipes[0], F_SETNOSIGPIPE, 1) != 0) e(19);
+	if (fcntl(pipes[0], F_GETNOSIGPIPE) == 0) e(20);
+	if (close(pipes[0]) != 0) e(21);
+	if (close(pipes[1]) != 0) e(22);
 }
 
 int