This is a simple pty runner developed by Elliott Slaughter.

To build it run:

$ make

And use it as follows:

$ ./pty <program> <arg>*

What is the purpose of a pty runner, you might ask? Suppose you want
to run a program you know might crash. If you run it interactively on
the command line, you will see anything printed to stdout (since it is
line buffered). But if you pipe stdout to a file, it will become block
buffered, and thus you probably won't get any output. The traditional
solution to this problem is to add a setvbuf call to the target program
to make it line buffer its stdout. My pty runner allows you to do the
same thing without having to modify or recompile the program.

For example:

$ ./test_bad
output
errput
Segmentation fault
$ ./test_bad 1>out 2>err
Segmentation fault
$ cat out
$ cat err
errput
$ ./pty ./test_bad
errput
output

Program terminated with exit code 11.
$ ./pty ./test_bad 1>out 2>err
$ cat out
output

Program terminated with exit code 11.
$ cat err
errput