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Re: [PATCH v2 07/15] qga: use qemu_open_cloexec() for safe_open_or_creat
From: |
Markus Armbruster |
Subject: |
Re: [PATCH v2 07/15] qga: use qemu_open_cloexec() for safe_open_or_create() |
Date: |
Thu, 05 May 2022 13:32:55 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
marcandre.lureau@redhat.com writes:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> The function takes care of setting CLOEXEC, and reporting error.
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
> qga/commands-posix.c | 11 +++--------
> 1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/qga/commands-posix.c b/qga/commands-posix.c
> index 0ef049650e31..8ebc327c5e02 100644
> --- a/qga/commands-posix.c
> +++ b/qga/commands-posix.c
> @@ -370,21 +370,16 @@ safe_open_or_create(const char *path, const char *mode,
> Error **errp)
> * open() is decisive and its third argument is ignored, and the second
> * open() and the fchmod() are never called.
> */
> - fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
> + fd = qemu_open_cloexec(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0),
> 0, errp);
> if (fd == -1 && errno == EEXIST) {
> + g_clear_pointer(errp, error_free);
Aha, this is where you really need ERRP_GUARD().
Elsewhere, we use
error_free(errp);
errp = NULL;
If one of these two ways is superior, we should use the superior one
everywhere.
If it's a wash, we should stick to the prevalent way.
> oflag &= ~(unsigned)O_CREAT;
> - fd = open(path, oflag);
> + fd = qemu_open_cloexec(path, oflag, 0, errp);
> }
> if (fd == -1) {
> - error_setg_errno(errp, errno,
> - "failed to open file '%s' "
> - "(mode: '%s')",
> - path, mode);
This changes the error message, doesn't it?
Not an objection, just something that might be worth noting in the
commit message.
> goto end;
> }
>
> - qemu_set_cloexec(fd);
> -
> if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
> error_setg_errno(errp, errno,
> "failed to set permission 0%03o on new file '%s'
> (mode: '%s')",
- [PATCH v2 00/15] Misc cleanups, marcandre . lureau, 2022/05/05
- [PATCH v2 04/15] include: adjust header guards after renaming, marcandre . lureau, 2022/05/05
- [PATCH v2 07/15] qga: use qemu_open_cloexec() for safe_open_or_create(), marcandre . lureau, 2022/05/05
- Re: [PATCH v2 07/15] qga: use qemu_open_cloexec() for safe_open_or_create(),
Markus Armbruster <=
- [PATCH v2 05/15] qga: flatten safe_open_or_create(), marcandre . lureau, 2022/05/05
- [PATCH v2 06/15] osdep: export qemu_open_cloexec(), marcandre . lureau, 2022/05/05
- [PATCH v2 08/15] qga: throw an Error in ga_channel_open(), marcandre . lureau, 2022/05/05
- [PATCH v2 09/15] qga: replace qemu_open_old() with qemu_open_cloexec(), marcandre . lureau, 2022/05/05