NAME

       explain_readv_or_die - read data into multiple buffers and report errors

SYNOPSIS

       #include <libexplain/readv.h>
       ssize_t explain_readv_or_die(int fildes, const struct iovec *iov, int iovcnt);
       ssize_t explain_readv_on_error(int fildes, const struct iovec *iov, int iovcnt);

DESCRIPTION

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

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

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

       iov     The iov, exactly as to be passed to the readv(2) system call.

       iovcnt  The iovcnt, exactly as to be passed to the readv(2) system call.

RETURN VALUE

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

       The explain_readv_on_error function  always  returns  the  value  return  by  the  wrapped
       readv(2) system call.

EXAMPLE

       The  explain_readv_or_die  function  is  intended  to  be used in a fashion similar to the
       following example:
              ssize_t result = explain_readv_or_die(fildes, iov, iovcnt);

SEE ALSO

       readv(2)
               read data into multiple buffers

       explain_readv(3)
               explain readv(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2009 Peter Miller

                                                                          explain_readv_or_die(3)