reboot − reboot system or halt processor
int reboot(int howto, char *bootargs);
reboot() function reboots the system. The
howto argument specifies the behavior of the system
while rebooting and is a mask constructed by a
bitwise-inclusive-OR of flags from the following list:
The processor is simply halted; no reboot takes place. This option should be used with caution.
Interpreted by the bootstrap program and kernel, causing the user to be asked for pathnames during the bootstrap.
The system is forced to panic immediately without any further processing and a crash dump is written to the dump device (see dumpadm(1M)) before rebooting.
Any other howto argument causes the kernel file to boot.
The interpretation of the bootargs argument is platform-dependent.
Upon successful completion, reboot() never returns. Otherwise, −1 is returned and errno is set to indicate the error.
The reboot() function will fail if:
The caller is not the super-user.
Only the super-user may reboot() a machine.