From: Helge Deller <deller@gmx.de>
Date: Tue, 6 Dec 2016 15:24:03 +0000 (+0100)
Subject: linux-user: Handle TIOCSTART and TIOCSTOP
X-Git-Tag: v2.9.0-rc0~137^2~22
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8cb762fe013a4368fc7aa2eba27c44033ec310e0;p=thirdparty%2Fqemu.git

linux-user: Handle TIOCSTART and TIOCSTOP

Some architectures (ppc, alpha, sparc, parisc, sh and xtensa) define the
BSD TIOCSTART and TIOCSTOP ioctls in their kernel headers to provide
compatibility to other operating systems.

Those ioctls are not implemented in Linux, nevertheless, bash will use
this ioctl if it's available on those architectures.

To avoid false warnings, add code to simply ignore those ioctls.

Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20161206152403.GA6651@ls3530>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---

diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 1bad701481a..eaf6fe61b07 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -422,3 +422,8 @@
                 MK_PTR(MK_STRUCT(STRUCT_rtentry)))
   IOCTL_SPECIAL(SIOCDELRT, IOC_W, do_ioctl_rt,
                 MK_PTR(MK_STRUCT(STRUCT_rtentry)))
+
+#ifdef TARGET_TIOCSTART
+  IOCTL_IGNORE(TIOCSTART)
+  IOCTL_IGNORE(TIOCSTOP)
+#endif
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7b77503f94f..acb004f035c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5453,6 +5453,8 @@ static IOCTLEntry ioctl_entries[] = {
     { TARGET_ ## cmd, cmd, #cmd, access, 0, {  __VA_ARGS__ } },
 #define IOCTL_SPECIAL(cmd, access, dofn, ...)                      \
     { TARGET_ ## cmd, cmd, #cmd, access, dofn, {  __VA_ARGS__ } },
+#define IOCTL_IGNORE(cmd) \
+    { TARGET_ ## cmd, 0, #cmd },
 #include "ioctls.h"
     { 0, 0, },
 };
@@ -5484,6 +5486,10 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
 #endif
     if (ie->do_ioctl) {
         return ie->do_ioctl(ie, buf_temp, fd, cmd, arg);
+    } else if (!ie->host_cmd) {
+        /* Some architectures define BSD ioctls in their headers
+           that are not implemented in Linux.  */
+        return -TARGET_ENOSYS;
     }
 
     switch(arg_type[0]) {