Synopsis

(Required) The error indicator errno shall not be used.

Enabled by default

Yes

Severity/Certainty

Low/Medium

Full description

Uses of errno were found. This check is identical to MISRAC2004-20.5.

Coding standards

Code examples

The following code example fails the check and will give a warning:

#include <errno.h>
#include <stdlib.h>

int example(char buf[]) {
  int i;
  errno = 0;
  i = atoi(buf);
  return (errno == 0) ? i : 0;
}

The following code example passes the check and will not give a warning about this issue:

void example(void) {
}