NAME

       explain_ptrace_or_die - process trace and report errors

SYNOPSIS

       #include <libexplain/ptrace.h>
       long explain_ptrace_or_die(int request, pid_t pid, void *addr, void *data);
       long explain_ptrace_on_error(int request, pid_t pid, void *addr, void *data);

DESCRIPTION

       The  explain_ptrace_or_die  function is used to call the ptrace(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_ptrace(3) function, and then the process  terminates
       by calling exit(EXIT_FAILURE).

       The explain_ptrace_on_error function is used to call the ptrace(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_ptrace(3) function, but still returns to the caller.

       request The request, exactly as to be passed to the ptrace(2) system call.

       pid     The pid, exactly as to be passed to the ptrace(2) system call.

       addr    The addr, exactly as to be passed to the ptrace(2) system call.

       data    The data, exactly as to be passed to the ptrace(2) system call.

RETURN VALUE

       The explain_ptrace_or_die function only returns on  success,  see  ptrace(2)  for  more  information.  On
       failure, prints an explanation and exits, it does not return.

       The  explain_ptrace_on_error  function  always  returns  the value return by the wrapped ptrace(2) system
       call.

EXAMPLE

       The explain_ptrace_or_die function is intended to be used in a fashion similar to the following example:
              long result = explain_ptrace_or_die(request, pid, addr, data);

SEE ALSO

       ptrace(2)
               process trace

       explain_ptrace(3)
               explain ptrace(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2010 Peter Miller

                                                                                        explain_ptrace_or_die(3)