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Man Pages


Manual Reference Pages  -  EXPLAIN_PTRACE_OR_DIE (3)

NAME

explain_ptrace_or_die - process trace and report errors
"process trace and report errors"

CONTENTS

Synopsis
Description
Return Value
Example
See Also
Copyright

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

The B]explain_ptrace_on_error function is used to call the I]ptrace(2) system call. On failure an explanation will be printed to I]stderr, obtained from the I]explain_ptrace(3) function, but still returns to the caller.
I]request
  The request, exactly as to be passed to the I]ptrace(2) system call.
I]pid The pid, exactly as to be passed to the I]ptrace(2) system call.
I]addr The addr, exactly as to be passed to the I]ptrace(2) system call.
I]data The data, exactly as to be passed to the I]ptrace(2) system call.

RETURN VALUE

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

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

EXAMPLE

The B]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

I]ptrace(2)
  process trace
I]explain_ptrace(3)
  explain I]ptrace(2) errors
I]exit(2) terminate the calling process

COPYRIGHT

libexplain version 1.3
Copyright © 2010 Peter Miller
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