From 7b5f699dbdf64cf9657e2955bccccc173d9b09fc Mon Sep 17 00:00:00 2001 From: "Kirill A. Shutemov" Date: Wed, 20 Jan 2010 00:56:08 +0100 Subject: Introduce qemu_write_full() A variant of write(2) which handles partial write. Signed-off-by: Kirill A. Shutemov Signed-off-by: Juan Quintela Signed-off-by: Anthony Liguori --- osdep.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'osdep.c') diff --git a/osdep.c b/osdep.c index 1310684e3c..09fbc992e3 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 ret = 0; + ssize_t total = 0; + + while (count) { + ret = write(fd, buf, count); + if (ret < 0) { + if (errno == EINTR) + continue; + break; + } + + count -= ret; + buf += ret; + total += ret; + } + + return total; +} + #ifndef _WIN32 /* * Creates a pipe with FD_CLOEXEC set on both file descriptors -- cgit v1.2.3