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)