/* ECP: FILEname=fig13_19.c */
/* 1*/   #include <signal.h>  /* Other Includes Omitted For Brevity */

/* 2*/   int
/* 3*/   RealSystem( const char *Command )
/* 4*/   {
/* 5*/       pid_t Pid;
/* 6*/       int Status;
/* 7*/       void ( *SaveIntr )( ), ( *SaveQuit )( );

/* 8*/       if( Command == NULL )
/* 9*/           return 1;

/*10*/       SaveIntr = signal(  SIGINT, SIG_IGN );      /* Ignore */
/*11*/       SaveQuit = signal(  SIGQUIT, SIG_IGN );    /* Signals */

/*12*/       Pid = fork( );
/*13*/       if( Pid < 0 )	/* Error */
/*14*/           return -1;

/*15*/       if( Pid == 0 )	/* Child */
/*16*/       {
/*17*/           signal( SIGINT, SaveIntr );            /* Restore */
/*18*/           signal( SIGQUIT, SaveQuit );           /* Signals */

/*19*/           execl( "/bin/sh", "sh", "-c", Command, NULL );
/*20*/           _exit( 127 );   /* execl Failed; Give Up On Child */
/*21*/       }
/*22*/          /* Parent */
/*23*/       waitpid( Pid, &Status, 0 );

/*24*/       signal( SIGINT,  SaveIntr );               /* Restore */
/*25*/       signal( SIGQUIT, SaveQuit );               /* Signals */

/*26*/       return Status;
/*27*/   }