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rtc: avoid printing and scanning time_t

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With the latest glibc it's now possible to define _TIME_BITS=64 to get
64-bit time_t on 32-bit Linux systems. This breaks the %ld printf/scanf
modifier used with the RTC drift timestamp. Process it as a double.
This commit is contained in:
Miroslav Lichvar 2021-08-05 14:07:17 +02:00
parent 789817cd91
commit f27d719a4e
1 changed files with 5 additions and 3 deletions
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8
rtc_linux.c
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@ -434,6 +434,7 @@ setup_config(void)
static void
read_coefs_from_file(void)
{
double ref_time;
FILE *in;
if (!tried_to_load_coefs) {
@ -444,11 +445,12 @@ read_coefs_from_file(void)
if (coefs_file_name &&
(in = UTI_OpenFile(NULL, coefs_file_name, NULL, 'r', 0))) {
if (fscanf(in, "%d%ld%lf%lf",
if (fscanf(in, "%d%lf%lf%lf",
&valid_coefs_from_file,
&file_ref_time,
&ref_time,
&file_ref_offset,
&file_rate_ppm) == 4) {
file_ref_time = ref_time;
} else {
LOG(LOGS_WARN, "Could not read coefficients from %s", coefs_file_name);
}
@ -472,7 +474,7 @@ write_coefs_to_file(int valid,time_t ref_time,double offset,double rate)
return RTC_ST_BADFILE;
/* Gain rate is written out in ppm */
fprintf(out, "%1d %ld %.6f %.3f\n", valid, ref_time, offset, 1.0e6 * rate);
fprintf(out, "%1d %.0f %.6f %.3f\n", valid, (double)ref_time, offset, 1.0e6 * rate);
fclose(out);
/* Rename the temporary file to the correct location */