util/spkmodem_recv: Add -u flag (no line buffer)

printf outputs to stdout, which is line buffered
by default.

Adding a -u option to disable buffering.

Exit when a non-support flag is given, but adhere
to current behaviour when no flag is given.

Signed-off-by: Leah Rowe <leah@libreboot.org>
fsdg20230625
Leah Rowe 2023-05-16 14:53:45 +01:00
parent 01fdfa3ab6
commit 25241ae222
1 changed files with 12 additions and 1 deletions

View File

@ -6,6 +6,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* Compilation: gcc -o spkmodem-recv spkmodem-recv */
/* Usage: parec --channels=1 --rate=48000 --format=s16le | ./spkmodem-recv */
@ -33,7 +34,17 @@ void fetch_sample(void);
int
main(int argc, char *argv[])
{
(void)argc; (void)argv;
int c;
while ((c = getopt(argc, argv, "u")) != -1) {
switch (c) {
case 'u':
setvbuf(stdout, NULL, _IONBF, 0);
break;
default:
err(errno = EINVAL, NULL);
}
}
while (!feof(stdin))
handle_audio();