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[Qemu-devel] [PATCH V12 01/15] Implement qemu_read_full
From: |
M. Mohan Kumar |
Subject: |
[Qemu-devel] [PATCH V12 01/15] Implement qemu_read_full |
Date: |
Mon, 5 Sep 2011 21:48:22 +0530 |
Signed-off-by: M. Mohan Kumar <address@hidden>
---
osdep.c | 32 ++++++++++++++++++++++++++++++++
qemu-common.h | 2 ++
2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/osdep.c b/osdep.c
index 56e6963..5a4d670 100644
--- a/osdep.c
+++ b/osdep.c
@@ -126,6 +126,38 @@ ssize_t qemu_write_full(int fd, const void *buf, size_t
count)
}
/*
+ * A variant of read(2) which handles interrupted read.
+ * Simlar to qemu_write_full function
+ *
+ * Return the number of bytes read.
+ *
+ * This function does not work with non-blocking fd's.
+ * errno is set if fewer than `count' bytes are read because of any
+ * error
+ */
+ssize_t qemu_read_full(int fd, void *buf, size_t count)
+{
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = read(fd, buf, count);
+ if (ret <= 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
+ }
+
+ return total;
+}
+
+/*
* Opens a socket with FD_CLOEXEC set
*/
int qemu_socket(int domain, int type, int protocol)
diff --git a/qemu-common.h b/qemu-common.h
index 404c421..d6aabd2 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -189,6 +189,8 @@ 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)
QEMU_WARN_UNUSED_RESULT;
+ssize_t qemu_read_full(int fd, void *buf, size_t count)
+ QEMU_WARN_UNUSED_RESULT;
void qemu_set_cloexec(int fd);
#ifndef _WIN32
--
1.7.6
- [Qemu-devel] [PATCH V12 10/15] hw/9pfs: Move file post creation changes to none security model, (continued)
- [Qemu-devel] [PATCH V12 10/15] hw/9pfs: Move file post creation changes to none security model, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 14/15] hw/9pfs: readlink in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 09/15] hw/9pfs: Rename in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 15/15] hw/9pfs: Chroot environment for other functions, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 07/15] hw/9pfs: Creating special files in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 13/15] hw/9pfs: stat in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 11/15] hw/9pfs: chmod in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 04/15] hw/9pfs: qemu interfaces for chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 05/15] hw/9pfs: Support for opening a file in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 02/15] hw/9pfs: Enable CONFIG_THREAD if CONFIG_VIRTFS is enabled, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 01/15] Implement qemu_read_full,
M. Mohan Kumar <=
- [Qemu-devel] [PATCH V12 06/15] hw/9pfs: Create support in chroot environment, M. Mohan Kumar, 2011/09/05
- [Qemu-devel] [PATCH V12 03/15] hw/9pfs: Provide chroot worker side interfaces, M. Mohan Kumar, 2011/09/05
- Re: [Qemu-devel] [PATCH V12 00/15] virtio-9p: chroot environment for passthrough security model, Stefan Hajnoczi, 2011/09/06