Programming

Hi,
I'm tying to use the following function to reboot the system as part of my code

Code:

#include <unistd.h>
#include <linux/reboot.h>
int restart(unsigned int delay)
{
  sleep(delay);
  return reboot(LINUX_REBOOT_CMD_RESTART);
}

When I try to compile the code I get the warning in the thread topic. However the code compiles and runs just fine. Flexelint also picks up the warning with the following message:
Info 718: reboot undeclared, assumed to return int
Info 746: Call to function 'reboot' not made in the presence of a prototype

Does anyone know what's wrong? Thanks!

Nothing is wrong. Your compilers are trying to "help" you by warning you of using function calls that have not properly been defined. Apparently, the linux/reboot.h header file doesn't include a function definition for reboot. You can fix this with:

Code:

#include <unistd.h>
#include <linux/reboot.h>
int reboot(int);
int restart(unsigned int delay)
{
  sleep(delay);
  return reboot(LINUX_REBOOT_CMD_RESTART);
}

Thanks. I looked at the linux/reboot.h header file and indeed there's no reboot definition. However the sys/reboot.h header file holds the definition so I've included that as well and now it works.