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 1.4
Copyright (C) 2009 Peter Miller