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replay: check return values of fwrite 

This patch adds error reporting when fwrite cannot completely
save the buffer to the file.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20180227095259.1060.86410.stgit@pasha-VirtualBox>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
This commit is contained in:
Pavel Dovgalyuk 2018-02-27 12:52:59 +03:00 committed by Paolo Bonzini
parent d759c951f3
commit 6dc0f52963
1 changed files with 15 additions and 2 deletions
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17
replay/replay-internal.c
View File

@ -24,12 +24,23 @@
static QemuMutex lock; static QemuMutex lock;
/* File for replay writing */ /* File for replay writing */
static bool write_error;
FILE *replay_file; FILE *replay_file;
static void replay_write_error(void)
{
if (!write_error) {
error_report("replay write error");
write_error = true;
}
}
void replay_put_byte(uint8_t byte) void replay_put_byte(uint8_t byte)
{ {
if (replay_file) { if (replay_file) {
putc(byte, replay_file); if (putc(byte, replay_file) == EOF) {
replay_write_error();
}
} }
} }
@ -62,7 +73,9 @@ void replay_put_array(const uint8_t *buf, size_t size)
{ {
if (replay_file) { if (replay_file) {
replay_put_dword(size); replay_put_dword(size);
fwrite(buf, 1, size, replay_file); if (fwrite(buf, 1, size, replay_file) != size) {
replay_write_error();
}
} }
} }