#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>


#include "lift.h"


int main
(
	int         argc,
	const char* argv[]
)
{
	char* formatted_pid = getenv( LIFT_PID_ENV );
	if( formatted_pid == NULL )
	{
		fprintf( stderr, "%s: variable " LIFT_PID_ENV " is not set\n", argv[ 0 ] );
		return EXIT_FAILURE;
	}

	char* formatted_end;
	long pid = strtol( formatted_pid, &formatted_end, 10 );
	if( *formatted_pid == '\0' || *formatted_end != '\0' )
	{
		fprintf( stderr, "%s: invalid value for " LIFT_PID_ENV ": %s\n", argv[ 0 ], formatted_pid );
		return EXIT_FAILURE;
	}

	if( kill( (pid_t)pid, SIGTERM ) < 0 )
	{
		fprintf( stderr, "kill(%ld): %s\n", pid, strerror( errno ) );
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}