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tools: kwboot: Handle EINTR in kwboot_tty_recv()

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The select() and read() syscalls may be interrupted. Handle EINTR and
retry them.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár
2022-01-25 18:13:11 +01:00
committed by Stefan Roese
parent 6ba7d63e01
commit 91fb095c0d
1 changed files with 7 additions and 3 deletions
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10
tools/kwboot.c
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@@ -409,15 +409,19 @@ kwboot_tty_recv(int fd, void *buf, size_t len, int timeo)
do {
nfds = select(fd + 1, &rfds, NULL, NULL, &tv);
if (nfds < 0)
if (nfds < 0 && errno == EINTR)
continue;
else if (nfds < 0)
goto out;
if (!nfds) {
else if (!nfds) {
errno = ETIMEDOUT;
goto out;
}
n = read(fd, buf, len);
if (n <= 0)
if (n < 0 && errno == EINTR)
continue;
else if (n <= 0)
goto out;
buf = (char *)buf + n;