From: Pali Rohár pali@kernel.org
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 --- tools/kwboot.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/tools/kwboot.c b/tools/kwboot.c index de433c1b04..8b748f0fdd 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -292,13 +292,15 @@ static int blk_rsp_timeo = KWBOOT_BLK_RSP_TIMEO; 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; }