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util/spkmodem_recv: Add error handling

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There was literally no error handling before.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2023-05-16 11:31:49 +01:00
parent 179323819b
commit 0cc23b2363
1 changed files with 11 additions and 3 deletions
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util/spkmodem_recv/spkmodem-recv.c
+11 -3
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@@ -1,6 +1,8 @@
/* spkmodem-recv.c - decode spkmodem signals */ /* spkmodem-recv.c - decode spkmodem signals */
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* SPDX-License-Identifier: GPL-2.0-or-later */
#include <err.h>
#include <errno.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@@ -54,7 +56,8 @@ print_chars(void)
llp++; llp++;
} }
if (llp == FLUSH_TIMEOUT) if (llp == FLUSH_TIMEOUT)
fflush(stdout); if (fflush(stdout) == EOF)
err(errno, NULL);
if (f2 <= FREQ_SEP_MIN || f2 >= FREQ_SEP_MAX if (f2 <= FREQ_SEP_MIN || f2 >= FREQ_SEP_MAX
|| f1 <= FREQ_DATA_MIN || f1 >= FREQ_DATA_MAX) { || f1 <= FREQ_DATA_MIN || f1 >= FREQ_DATA_MAX) {
@@ -62,8 +65,11 @@ print_chars(void)
return; return;
} }
#if DEBUG #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, printf ("%d %d %d @%d\n", f1, f2, FREQ_DATA_THRESHOLD,
ftell(stdin) - sizeof(frame)); stdin_pos - sizeof(frame));
#endif #endif
if (f1 < FREQ_DATA_THRESHOLD) if (f1 < FREQ_DATA_THRESHOLD)
ascii |= (1 << ascii_bit); ascii |= (1 << ascii_bit);
@@ -90,7 +96,9 @@ read_sample(void)
f1 -= pulse[ringpos]; f1 -= pulse[ringpos];
f1 += pulse[(ringpos + SAMPLES_PER_FRAME) % (2 * SAMPLES_PER_FRAME)]; f1 += pulse[(ringpos + SAMPLES_PER_FRAME) % (2 * SAMPLES_PER_FRAME)];
f2 -= 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]); amplitude += abs(frame[ringpos]);
if (abs(frame[ringpos]) > THRESHOLD) { /* rising/falling edge(pulse) */ if (abs(frame[ringpos]) > THRESHOLD) { /* rising/falling edge(pulse) */