PX
Section: User Commands (1)
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BSD mandoc
BSD 3.0
NAME
px
- Pascal interpreter
SYNOPSIS
px
[obj [argument ...
]
]
DESCRIPTION
Px interprets the abstract machine code generated by
pi(1).
The first argument is the file to be interpreted, and defaults
to
obj
remaining arguments are available to the Pascal program using the
built-ins
argv
and
argc
Px is also invoked by
pix
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
pi
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
pi(1),
pix(1)
-
"Berkeley Pascal User's Manual"
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
input
or
output
was used before a call to
reset
or
rewrite
- Statement count limit exceeded
-
The limit of 500,000 executed statements
(which prevents excessive 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: Some message
-
Indicates an internal inconsistency detected in
px
probably due to a Pascal system bug.
HISTORY
Px appeared in
BSD 3.0
BUGS
Post-mortem traceback is not limited;
infinite recursion leads to almost infinite traceback.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- FILES
-
- SEE ALSO
-
- DIAGNOSTICS
-
- HISTORY
-
- BUGS
-
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