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[Qemu-devel] [PULL 26/38] qga: Use return values instead of error_is_set
From: |
Luiz Capitulino |
Subject: |
[Qemu-devel] [PULL 26/38] qga: Use return values instead of error_is_set(errp) |
Date: |
Thu, 8 May 2014 14:52:50 -0400 |
From: Markus Armbruster <address@hidden>
Using error_is_set(errp) to check whether a function call failed is
fragile: it breaks when errp is null. ga_get_fd_handle() and
guest_file_handle_add() don't return a useful value when they fail,
but that's just stupid. Fix that, and check them instead. As far
as I can tell, errp can't be null there, but this is more robust and
more obviously correct.
Signed-off-by: Markus Armbruster <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: Michael Roth <address@hidden>
Signed-off-by: Luiz Capitulino <address@hidden>
---
qga/commands-posix.c | 6 +++---
qga/main.c | 1 +
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index f6af7d1..6af974f 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -223,8 +223,8 @@ static int64_t guest_file_handle_add(FILE *fh, Error **errp)
int64_t handle;
handle = ga_get_fd_handle(ga_state, errp);
- if (error_is_set(errp)) {
- return 0;
+ if (handle < 0) {
+ return -1;
}
gfh = g_malloc0(sizeof(GuestFileHandle));
@@ -407,7 +407,7 @@ int64_t qmp_guest_file_open(const char *path, bool
has_mode, const char *mode,
}
handle = guest_file_handle_add(fh, errp);
- if (error_is_set(errp)) {
+ if (handle < 0) {
fclose(fh);
return -1;
}
diff --git a/qga/main.c b/qga/main.c
index 38219c9..8b927c9 100644
--- a/qga/main.c
+++ b/qga/main.c
@@ -910,6 +910,7 @@ int64_t ga_get_fd_handle(GAState *s, Error **errp)
if (!write_persistent_state(&s->pstate, s->pstate_filepath)) {
error_setg(errp, "failed to commit persistent state to disk");
+ return -1;
}
return handle;
--
1.9.0
- [Qemu-devel] [PULL 18/38] pci-assign: propagate errors from assigned_dev_register_regions(), (continued)
- [Qemu-devel] [PULL 18/38] pci-assign: propagate errors from assigned_dev_register_regions(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 17/38] pci-assign: propagate errors from assigned_dev_register_msix_mmio(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 19/38] pci-assign: propagate errors from assign_device(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 20/38] pci-assign: propagate errors from assign_intx(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 21/38] pci-assign: assigned_initfn(): set monitor error in common error handler, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 23/38] qga: Consistently name Error ** objects errp, and not err, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 22/38] qmp hmp: Consistently name Error * objects err, and not errp, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 24/38] qmp: Consistently name Error ** objects errp, and not err, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 25/38] error: Consistently name Error ** objects errp, and not err, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 27/38] hmp: Guard against misuse of hmp_handle_error(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 26/38] qga: Use return values instead of error_is_set(errp),
Luiz Capitulino <=
- [Qemu-devel] [PULL 28/38] qapi: Drop redundant, unclean error_is_set(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 30/38] qapi: Clean up fragile use of error_is_set(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 29/38] tests/qapi-schema: Drop superfluous error_is_set(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 31/38] qga: Clean up fragile use of error_is_set(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 34/38] dump: Drop pointless error_is_set(), DumpState member errp, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 38/38] Revert "qapi: Clean up superfluous null check in qapi_dealloc_type_str()", Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 35/38] qmp: Don't use error_is_set() to suppress additional errors, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 33/38] qemu-option: Clean up fragile use of error_is_set(), Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 36/38] qmp: use valid JSON in transaction example, Luiz Capitulino, 2014/05/08
- [Qemu-devel] [PULL 32/38] qga: Drop superfluous error_is_set(), Luiz Capitulino, 2014/05/08