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author | Kirill A. Shutemov <kirill@shutemov.name> | 2010-01-20 00:56:08 +0100 |
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committer | Anthony Liguori <aliguori@us.ibm.com> | 2010-01-26 14:59:19 -0600 |
commit | 7b5f699dbdf64cf9657e2955bccccc173d9b09fc (patch) | |
tree | 9f714a9eb0cc512bb871e18099140051ffe50607 /osdep.c | |
parent | 5d757b563d59142ca81e1073a8e8396750a0ad1a (diff) | |
download | qemu-7b5f699dbdf64cf9657e2955bccccc173d9b09fc.zip qemu-7b5f699dbdf64cf9657e2955bccccc173d9b09fc.tar.gz qemu-7b5f699dbdf64cf9657e2955bccccc173d9b09fc.tar.bz2 |
Introduce qemu_write_full()
A variant of write(2) which handles partial write.
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'osdep.c')
-rw-r--r-- | osdep.c | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -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 |