diff options
| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2016-09-15 15:28:36 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-10-30 19:46:49 -0400 |
| commit | 0e338e79b08567669c0f1da0e7cdd779b164f39d (patch) | |
| tree | 33f1d48f645b4c6bc9ffcff436a6834a19587977 | |
| parent | 7a96111611ed8e67a0a371be04779609a2483a7e (diff) | |
| download | trace-cmd-0e338e79b08567669c0f1da0e7cdd779b164f39d.tar.gz | |
trace-cmd msg: Do not perform read when expecting no data
If the size of a read is zero, do not perform the read.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | trace-msg.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/trace-msg.c b/trace-msg.c index 62a9c194..e53c073e 100644 --- a/trace-msg.c +++ b/trace-msg.c @@ -294,7 +294,7 @@ static int msg_read(int fd, void *buf, u32 size, int *n) { int r; - do { + while (size) { r = read(fd, buf + *n, size); if (r < 0) { if (errno == EINTR) @@ -304,7 +304,7 @@ static int msg_read(int fd, void *buf, u32 size, int *n) return -ENOTCONN; size -= r; *n += r; - } while (size); + } return 0; } |