tools: kwboot: Handle EINTR in kwboot_write()
The write() syscall may be interrupted. Handle EINTR and retry it.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/tools/kwboot.c b/tools/kwboot.c
index de433c1..8b748f0 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -292,13 +292,15 @@
static ssize_t
kwboot_write(int fd, const char *buf, size_t len)
{
- size_t tot = 0;
+ ssize_t tot = 0;
while (tot < len) {
ssize_t wr = write(fd, buf + tot, len - tot);
- if (wr < 0)
- return -1;
+ if (wr < 0 && errno == EINTR)
+ continue;
+ else if (wr < 0)
+ return wr;
tot += wr;
}