NAME

       explain_pwrite_or_die - seek and write to a file descriptor and report errors

SYNOPSIS

       #include <libexplain/pwrite.h>
       ssize_t  explain_pwrite_or_die(int  fildes,  const  void  *data,  size_t  data_size, off_t
       offset);
       ssize_t explain_pwrite_on_error(int fildes, const  void  *data,  size_t  data_size,  off_t
       offset))

DESCRIPTION

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

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

       fildes  The fildes, exactly as to be passed to the pwrite(2) system call.

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

       data_size
               The data_size, exactly as to be passed to the pwrite(2) system call.

       offset  The offset, exactly as to be passed to the pwrite(2) system call.

RETURN VALUE

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

       The explain_pwrite_on_error function always  returns  the  value  return  by  the  wrapped
       pwrite(2) system call.

EXAMPLE

       The  explain_pwrite_or_die  function  is  intended  to be used in a fashion similar to the
       following example:
              ssize_t result = explain_pwrite_or_die(fildes, data, data_size, offset);

SEE ALSO

       pwrite(2)
               read from or write to a file descriptor at a given offset

       explain_pwrite(3)
               explain pwrite(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2009 Peter Miller

                                                                         explain_pwrite_or_die(3)