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authorThomas Weißschuh <thomas@t-8ch.de>2023-04-26 09:06:59 +0200
committerLaurent Vivier <laurent@vivier.eu>2023-05-17 07:20:29 +0200
commit59d11727768a0a29675a78a18c3f87390d5dc90a (patch)
tree9327e03835442560bc227ef80864b41b7ff64837 /linux-user
parent8ddc171b7b302844d9f4598125fed925b72c686c (diff)
linux-user: report ENOTTY for unknown ioctls
The correct error number for unknown ioctls is ENOTTY. ENOSYS would mean that the ioctl() syscall itself is not implemented, which is very improbable and unexpected for userspace. ENOTTY means "Inappropriate ioctl for device". This is what the kernel returns on unknown ioctls, what qemu is trying to express and what userspace is prepared to handle. Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230426070659.80649-1-thomas@t-8ch.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 085ce53021..954ed14df4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5747,7 +5747,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
if (ie->target_cmd == 0) {
qemu_log_mask(
LOG_UNIMP, "Unsupported ioctl: cmd=0x%04lx\n", (long)cmd);
- return -TARGET_ENOSYS;
+ return -TARGET_ENOTTY;
}
if (ie->target_cmd == cmd)
break;
@@ -5759,7 +5759,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
} else if (!ie->host_cmd) {
/* Some architectures define BSD ioctls in their headers
that are not implemented in Linux. */
- return -TARGET_ENOSYS;
+ return -TARGET_ENOTTY;
}
switch(arg_type[0]) {
@@ -5817,7 +5817,7 @@ static abi_long do_ioctl(int fd, int cmd, abi_long arg)
qemu_log_mask(LOG_UNIMP,
"Unsupported ioctl type: cmd=0x%04lx type=%d\n",
(long)cmd, arg_type[0]);
- ret = -TARGET_ENOSYS;
+ ret = -TARGET_ENOTTY;
break;
}
return ret;