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[Qemu-devel] [PATCH 01/17] Introduce qemu_write_full()
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 01/17] Introduce qemu_write_full() |
Date: |
Wed, 20 Jan 2010 21:13:57 +0100 |
From: Kirill A. Shutemov <address@hidden>
A variant of write(2) which handles partial write.
Signed-off-by: Kirill A. Shutemov <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
osdep.c | 27 +++++++++++++++++++++++++++
qemu-common.h | 1 +
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/osdep.c b/osdep.c
index 1310684..c5d608e 100644
--- a/osdep.c
+++ b/osdep.c
@@ -243,6 +243,33 @@ int qemu_open(const char *name, int flags, ...)
return ret;
}
+/*
+ * A variant of write(2) which handles partial write.
+ *
+ * Return the number of bytes transferred.
+ * Set errno if fewer than `count' bytes are written.
+ */
+ssize_t qemu_write_full(int fd, const void *buf, size_t count)
+{
+ ssize_t written = 0;
+ const char *mem = buf;
+
+ while (count) {
+ ssize_t ret = write(fd, mem, count);
+ if (ret < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ break;
+ }
+
+ count -= ret;
+ mem += ret;
+ written += ret;
+ }
+
+ return written;
+}
+
#ifndef _WIN32
/*
* Creates a pipe with FD_CLOEXEC set on both file descriptors
diff --git a/qemu-common.h b/qemu-common.h
index d96060a..a2731e1 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -161,6 +161,7 @@ void qemu_mutex_lock_iothread(void);
void qemu_mutex_unlock_iothread(void);
int qemu_open(const char *name, int flags, ...);
+ssize_t qemu_write_full(int fd, const void *buf, size_t count);
void qemu_set_cloexec(int fd);
#ifndef _WIN32
--
1.6.6
- [Qemu-devel] [PATCH v2 00/17] Fix compilation with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 02/17] force to test result for qemu_write_full(), Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 03/17] posix-aio-compat.c: fix warning with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 01/17] Introduce qemu_write_full(),
Juan Quintela <=
- [Qemu-devel] [PATCH 05/17] block/qcow.c: fix warnings with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 04/17] block/cow.c: fix warnings with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 06/17] block/vmdk.o: fix warnings with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 07/17] block/vvfat.c: fix warnings with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 08/17] block/qcow2.c: fix warnings with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20
- [Qemu-devel] [PATCH 10/17] usb-linux.c: fix warning with _FORTIFY_SOURCE, Juan Quintela, 2010/01/20