/* ECP: FILEname=fig13_18.c */
/* 1*/   #include <signal.h>    /* Other Includes Omitted For Brevity */

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

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

/*10*/       Pid = fork( );
/*11*/       if( Pid < 0 )	/* Error */
/*12*/           return -1;

/*13*/       if( Pid == 0 )	/* Child */
/*14*/       {
/*15*/           execl( "/bin/sh", "sh", "-c", Command, NULL );
/*16*/           _exit( 127 );        /* execl Failed; Give Up On Child */
/*17*/       }
/*18*/          /* Parent */
/*19*/       SaveIntr = signal(  SIGINT, SIG_IGN );          /* Ignore */
/*20*/       SaveQuit = signal(  SIGQUIT, SIG_IGN );        /* Signals */

/*21*/       waitpid( Pid, &Status, 0 );

/*22*/       signal( SIGINT,  SaveIntr );                   /* Restore */
/*23*/       signal( SIGQUIT, SaveQuit );                   /* Signals */

/*24*/       return Status;
/*25*/   }