Commit e148c760 authored Apr 24, 2014 by Namhyung Kim Committed by Jiri Olsa Apr 29, 2014

perf tools: Handle EINTR error for readn/writen



Those readn/writen functions are to ensure read/write does I/O for
a given size exactly.  But ion() - its implementation - does not
handle in case it returns prematurely due to a signal.  As it's not
an error itself so just retry the operation.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1398346054-3322-1-git-send-email-namhyung@kernel.org


Signed-off-by: Jiri Olsa <jolsa@kernel.org>

parent 20113199

tools/perf/util/util.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -166,6 +166,8 @@ static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
	ssize_t ret = is_read ? read(fd, buf, left) :		ssize_t ret = is_read ? read(fd, buf, left) :
	write(fd, buf, left);		write(fd, buf, left);

			if (ret < 0 && errno == EINTR)
			continue;
	if (ret <= 0)		if (ret <= 0)
	return ret;		return ret;