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