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[Qemu-devel] [PATCH v5 3/6] char: Let writers know how much data was wri
From: |
Amit Shah |
Subject: |
[Qemu-devel] [PATCH v5 3/6] char: Let writers know how much data was written in case of errors |
Date: |
Tue, 4 May 2010 16:22:44 +0530 |
On writing errors, we just returned -1 even if some bytes were already
written out. Ensure we return the number of bytes written before we
return the error (on a subsequent call to qemu_chr_write()).
Signed-off-by: Amit Shah <address@hidden>
---
qemu-char.c | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/qemu-char.c b/qemu-char.c
index 65cb3f5..97f2ef6 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -507,6 +507,9 @@ int send_all(int fd, const void *buf, int len1)
while (len > 0) {
ret = send(fd, buf, len, 0);
if (ret < 0) {
+ if (len1 - len) {
+ return len1 - len;
+ }
errno = WSAGetLastError();
if (errno != WSAEWOULDBLOCK) {
return -1;
@@ -531,8 +534,12 @@ static int unix_write(int fd, const uint8_t *buf, int len1)
while (len > 0) {
ret = write(fd, buf, len);
if (ret < 0) {
- if (errno != EINTR && errno != EAGAIN)
+ if (len1 - len) {
+ return len1 - len;
+ }
+ if (errno != EINTR && errno != EAGAIN) {
return -1;
+ }
} else if (ret == 0) {
break;
} else {
--
1.6.2.5