diff mbox series

[04/51] semihosting/arm-compat-semi: Avoid using hardcoded /tmp

Message ID 20220824094029.1634519-5-bmeng.cn@gmail.com (mailing list archive)
State New, archived
Headers show
Series tests/qtest: Enable running qtest on Windows | expand

Commit Message

Bin Meng Aug. 24, 2022, 9:39 a.m. UTC
From: Bin Meng <bin.meng@windriver.com>

Use g_get_tmp_dir() to get the directory to use for temporary files.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 semihosting/arm-compat-semi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Marc-André Lureau Aug. 31, 2022, 12:59 p.m. UTC | #1
Hi

On Wed, Aug 24, 2022 at 1:54 PM Bin Meng <bmeng.cn@gmail.com> wrote:

> From: Bin Meng <bin.meng@windriver.com>
>
> Use g_get_tmp_dir() to get the directory to use for temporary files.
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>
> ---
>
>  semihosting/arm-compat-semi.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
> index e741674238..d5e66cc298 100644
> --- a/semihosting/arm-compat-semi.c
> +++ b/semihosting/arm-compat-semi.c
> @@ -503,7 +503,8 @@ void do_common_semihosting(CPUState *cs)
>          GET_ARG(0);
>          GET_ARG(1);
>          GET_ARG(2);
> -        len = asprintf(&s, "/tmp/qemu-%x%02x", getpid(), (int)arg1 &
> 0xff);
> +        len = asprintf(&s, "%s/qemu-%x%02x", g_get_tmp_dir(),
> +                       getpid(), (int)arg1 & 0xff);
>

This is most likely wrong. I am not familiar with semihosting, but I
believe we are implementing tmpnam(), it should return a POSIX filename.


>          if (len < 0) {
>              common_semi_set_ret(cs, -1);
>              break;
> --
> 2.34.1
>
>
>
Bin Meng Sept. 1, 2022, 7:11 a.m. UTC | #2
On Wed, Aug 31, 2022 at 8:59 PM Marc-André Lureau
<marcandre.lureau@gmail.com> wrote:
>
> Hi
>
> On Wed, Aug 24, 2022 at 1:54 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>>
>> From: Bin Meng <bin.meng@windriver.com>
>>
>> Use g_get_tmp_dir() to get the directory to use for temporary files.
>>
>> Signed-off-by: Bin Meng <bin.meng@windriver.com>
>> ---
>>
>>  semihosting/arm-compat-semi.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
>> index e741674238..d5e66cc298 100644
>> --- a/semihosting/arm-compat-semi.c
>> +++ b/semihosting/arm-compat-semi.c
>> @@ -503,7 +503,8 @@ void do_common_semihosting(CPUState *cs)
>>          GET_ARG(0);
>>          GET_ARG(1);
>>          GET_ARG(2);
>> -        len = asprintf(&s, "/tmp/qemu-%x%02x", getpid(), (int)arg1 & 0xff);
>> +        len = asprintf(&s, "%s/qemu-%x%02x", g_get_tmp_dir(),
>> +                       getpid(), (int)arg1 & 0xff);
>
>
> This is most likely wrong. I am not familiar with semihosting, but I believe we are implementing tmpnam(), it should return a POSIX filename.

Replacing /tmp with g_get_tmp_dir() is not wrong, correct?

I checked the semihosting spec, it does not mention the file name
should be a POSIX compliant path.
https://developer.arm.com/documentation/dui0058/d/semihosting/semihosting-swis/sys-tmpnam--0x0d-

Certainly this needs a semihosting expert to take a look.

>
>>
>>          if (len < 0) {
>>              common_semi_set_ret(cs, -1);
>>              break;
>> --

Regards,
Bin
Richard Henderson Sept. 1, 2022, 9:20 a.m. UTC | #3
On 9/1/22 08:11, Bin Meng wrote:
>>> -        len = asprintf(&s, "/tmp/qemu-%x%02x", getpid(), (int)arg1 & 0xff);
>>> +        len = asprintf(&s, "%s/qemu-%x%02x", g_get_tmp_dir(),
>>> +                       getpid(), (int)arg1 & 0xff);
>>
>>
>> This is most likely wrong. I am not familiar with semihosting, but I believe we are implementing tmpnam(), it should return a POSIX filename.
> 
> Replacing /tmp with g_get_tmp_dir() is not wrong, correct?

The replacement is correct.


r~
diff mbox series

Patch

diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c
index e741674238..d5e66cc298 100644
--- a/semihosting/arm-compat-semi.c
+++ b/semihosting/arm-compat-semi.c
@@ -503,7 +503,8 @@  void do_common_semihosting(CPUState *cs)
         GET_ARG(0);
         GET_ARG(1);
         GET_ARG(2);
-        len = asprintf(&s, "/tmp/qemu-%x%02x", getpid(), (int)arg1 & 0xff);
+        len = asprintf(&s, "%s/qemu-%x%02x", g_get_tmp_dir(),
+                       getpid(), (int)arg1 & 0xff);
         if (len < 0) {
             common_semi_set_ret(cs, -1);
             break;