[alsa-devel] [PATCH v2 1/2] aplay: Show usage if no parameter is passed

When aplay/arecord are called without any argument the application hangs forever.

Instead of hanging, print the usage and exit.

Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- Changes since v1: - Also check for isatty, so that 'aplay < file.wav' can still work

aplay/aplay.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/aplay/aplay.c b/aplay/aplay.c index 741979a..38459e6 100644 --- a/aplay/aplay.c +++ b/aplay/aplay.c @@ -519,6 +519,11 @@ int main(int argc, char *argv[]) return 1; }

+ if (isatty(fileno(stdin)) && (argc == 1)) { + usage(command); + return 0; + } + chunk_size = -1; rhwparams.format = DEFAULT_FORMAT; rhwparams.rate = DEFAULT_SPEED;