explain_readv_or_die − read data into multiple buffers and report errors
#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);
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. |
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iov |
The iov, exactly as to be passed to the readv(2) system call. |
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iovcnt |
The iovcnt, exactly as to be passed to the readv(2) system call. |
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.
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);
read data into multiple buffers
explain readv(2) errors
terminate the calling process |
libexplain version 1.4
Copyright (C) 2009 Peter Miller