Slide 29 of 42

Error Handling

• errno is a system global defined in <errno.h>
• Functions:
- char *strerror(int errnum);
- void perror(const char *msg);

if ( (fd = open(pathname, O_RDWR)) < 0)
{
      /* errno already set by open() */
      perror("functionX(): open()");
      return -1;
}