2000-05-05 Michael Snyder <msnyder@seadog.cygnus.com>

2000-05-05  Michael Snyder  <msnyder@seadog.cygnus.com>

        * procfs.c: Cleanup of procfs tracing.  Move defines and
        prototypes to proc-utils.h
        * proc-utils.h: Define tracing macros.  Declare trace functions.
        * proc-api.c: Make procfs tracing a runtime option.
        (prepare_to_trace): New function, abstracted out of several
        places.  Open a trace file if one is required.
        (ioctl_with_trace, write_with_trace, open_with_trace,
        close_with_trace, wait_with_trace, lseek_with_trace):
        Report errno if an error occurs in a system call.
        (write_with_trace): Make 2nd arg void *, to agree with write.