diff options
Diffstat (limited to 'util/spkmodem_recv/spkmodem-recv.c')
| -rw-r--r-- | util/spkmodem_recv/spkmodem-recv.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/util/spkmodem_recv/spkmodem-recv.c b/util/spkmodem_recv/spkmodem-recv.c index ae0b03d5..6d37ff44 100644 --- a/util/spkmodem_recv/spkmodem-recv.c +++ b/util/spkmodem_recv/spkmodem-recv.c @@ -1,6 +1,8 @@ /* spkmodem-recv.c - decode spkmodem signals */ /* SPDX-License-Identifier: GPL-2.0-or-later */ +#include <err.h> +#include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -54,7 +56,8 @@ print_chars(void) llp++; } if (llp == FLUSH_TIMEOUT) - fflush(stdout); + if (fflush(stdout) == EOF) + err(errno, NULL); if (f2 <= FREQ_SEP_MIN || f2 >= FREQ_SEP_MAX || f1 <= FREQ_DATA_MIN || f1 >= FREQ_DATA_MAX) { @@ -62,8 +65,11 @@ print_chars(void) return; } #if DEBUG + long stdin_pos = 0; + if ((stdin_pos = ftell(stdin)) == -1) + err(errno, NULL); printf ("%d %d %d @%d\n", f1, f2, FREQ_DATA_THRESHOLD, - ftell(stdin) - sizeof(frame)); + stdin_pos - sizeof(frame)); #endif if (f1 < FREQ_DATA_THRESHOLD) ascii |= (1 << ascii_bit); @@ -90,7 +96,9 @@ read_sample(void) f1 -= pulse[ringpos]; f1 += pulse[(ringpos + SAMPLES_PER_FRAME) % (2 * SAMPLES_PER_FRAME)]; f2 -= pulse[(ringpos + SAMPLES_PER_FRAME) % (2 * SAMPLES_PER_FRAME)]; - fread(frame + ringpos, 1, sizeof(frame[0]), stdin); + if (fread(frame + ringpos, 1, sizeof(frame[0]), stdin) + != sizeof(frame[0])) + err(errno = ECANCELED, "Could not read frame."); amplitude += abs(frame[ringpos]); if (abs(frame[ringpos]) > THRESHOLD) { /* rising/falling edge(pulse) */ |