strtod() uses the current locale when parsing numbers, while all values
in sysfs use the "C" locale. Hence the former may expect a comma as the
radix character, while the latter always uses a decimal point, leading
to the display of incorrect values.
Temporarily switch to the "C" locale before parsing double numbers to
fix this.
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
examples/iio-monitor.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/examples/iio-monitor.c b/examples/iio-monitor.c
index 8b632187829869ae..558c0f33a36ef7b9 100644
--- a/examples/iio-monitor.c
+++ b/examples/iio-monitor.c
@@ -21,6 +21,7 @@
#define _DEFAULT_SOURCE
#include <cdk/cdk.h>
+#include <locale.h>
#include <pthread.h>
#include <stdbool.h>
#include <unistd.h>
@@ -61,9 +62,13 @@ static bool is_valid_channel(struct iio_channel *chn)
static double get_channel_value(struct iio_channel *chn)
{
+ char *old_locale;
char buf[1024];
double val;
+ old_locale = strdup(setlocale(LC_NUMERIC, NULL));
+ setlocale(LC_NUMERIC, "C");
+
if (channel_has_attr(chn, "input")) {
iio_channel_attr_read(chn, "input", buf, sizeof(buf));
val = strtod(buf, NULL);
@@ -82,6 +87,9 @@ static double get_channel_value(struct iio_channel *chn)
}
}
+ setlocale(LC_NUMERIC, old_locale);
+ free(old_locale);
+
return val / 1000.0;
}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
