PX(1)                                                                    PX(1)



NAME
       px - Pascal interpreter

SYNOPSIS
       px [ obj [ argument ... ] ]

DESCRIPTION
       _P_x  interprets  the  abstract  machine code generated by _p_i_.  The first
       argument is the file to be interpreted, and defaults to _o_b_j;  remaining
       arguments  are available to the Pascal program using the built-ins _a_r_g_v
       and _a_r_g_c_.  _P_x is also invoked by _p_i_x when running ‘load and go’.

       If the program terminates abnormally an error  message  and  a  control
       flow  backtrace  are  printed.   The  number of statements executed and
       total execution time are  printed  after  normal  termination.   The  p
       option  of  _p_i suppresses all of this except the message indicating the
       cause of abnormal termination.

FILES
       obj       default object file
       pmon.out  profile data file

SEE ALSO
       Berkeley Pascal User’s Manual
       pi(1), pix(1)

DIAGNOSTICS
       Most run-time error messages are self-explanatory.  Some  of  the  more
       unusual ones are:

       Reference to an inactive file
             A file other than _i_n_p_u_t or _o_u_t_p_u_t was used before a call to _r_e_s_e_t
             or _r_e_w_r_i_t_e_.

       Statement count limit exceeded
             The limit of 500,000 executed statements (which  prevents  exces‐
             sive looping or recursion) has been exceeded.

       Bad data found on integer read
       Bad data found on real read
             Usually,  non-numeric  input  was found for a number.  For reals,
             Pascal requires digits before and after the decimal point so that
             numbers like ‘.1’ or ‘21.’ evoke the second diagnostic.

       panic: _S_o_m_e _m_e_s_s_a_g_e
             Indicates  an  internal inconsistency detected in _p_x probably due
             to a Pascal system bug.

AUTHORS
       Charles B. Haley, William Joy, and Ken Thompson
       VAX-11 version by Kirk McKusick

BUGS
       Post-mortem traceback is  not  limited;  infinite  recursion  leads  to
       almost infinite traceback.



3rd Berkeley Distribution        May 12, 1986                            PX(1)