[PATCH] fix the empty file writting Upstream-Status: pending With the feature that checking the disk filled up, the return value of function write_behind was checked and used to detect the disk status. While for empty file, without data being written, this function will return -1 thus the disk filled up error was miss-raised. make write_behind to return 0 if written file is empty, to fix the this bug. Signed-off-by: Roy.Li --- common/tftpsubs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/common/tftpsubs.c b/common/tftpsubs.c index b4ea3f2..9f6cafc 100644 --- a/common/tftpsubs.c +++ b/common/tftpsubs.c @@ -198,9 +198,12 @@ int write_behind(FILE * file, int convert) nextone = !nextone; /* incr for next time */ buf = dp->th_data; - if (count <= 0) + if (count < 0) return -1; /* nak logic? */ + if (count == 0) + return 0; + if (convert == 0) return write(fileno(file), buf, count); -- 1.9.1