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gpio.c: check return status of open call

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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Brendan Le Foll
2014-11-26 13:56:10 +00:00
parent a7b8d4a0ca
commit fefe0a24cd
1 changed files with 6 additions and 1 deletions
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7
src/gpio/gpio.c
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@@ -180,7 +180,12 @@ mraa_gpio_interrupt_handler(void* arg)
// open gpio value with open(3)
char bu[MAX_SIZE];
sprintf(bu, SYSFS_CLASS_GPIO "/gpio%d/value", dev->pin);
dev->isr_value_fp = open(bu, O_RDONLY);
int fp = open(bu, O_RDONLY);
if (fp < 0) {
syslog(LOG_ERR, "gpio: failed to open gpio%d/value", dev->pin);
return NULL;
}
dev->isr_value_fp = fp;
for (;;) {
ret = mraa_gpio_wait_interrupt(dev->isr_value_fp);