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 0.19
Copyright (C) 2009 Peter Miller
explain_readv_or_die(3)