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Man Pages


Manual Reference Pages  -  EXPLAIN_WRITEV_OR_DIE (3)

NAME

explain_writev_or_die - write data from multiple buffers and report errors
"write data from multiple buffers and report errors"

CONTENTS

Synopsis
Description
Return Value
Example
See Also
Copyright

SYNOPSIS

#include <libexplain/writev.h>

ssize_t explain_writev_or_die(int fildes, const struct iovec *data, int data_size);
ssize_t explain_writev_on_error(int fildes, const struct iovec *data, int data_size);

DESCRIPTION

The B]explain_writev_or_die function is used to call the I]writev(2) system call. On failure an explanation will be printed to I]stderr, obtained from the I]explain_writev(3) function, and then the process terminates by calling CW]exit(EXIT_FAILURE).

The B]explain_writev_on_error function is used to call the I]writev(2) system call. On failure an explanation will be printed to I]stderr, obtained from the I]explain_writev(3) function, but still returns to the caller.
I]fildes The fildes, exactly as to be passed to the I]writev(2) system call.
I]data The data, exactly as to be passed to the I]writev(2) system call.
I]data_size
  The data_size, exactly as to be passed to the I]writev(2) system call.

RETURN VALUE

The B]explain_writev_or_die function only returns on success, see I]writev(2) for more information. On failure, prints an explanation and exits, it does not return.

The B]explain_writev_on_error function always returns the value return by the wrapped I]writev(2) system call.

EXAMPLE

The B]explain_writev_or_die function is intended to be used in a fashion similar to the following example:
ssize_t result = explain_writev_or_die(fildes, data, data_size);

SEE ALSO

I]writev(2)
  write data from multiple buffers
I]explain_writev(3)
  explain I]writev(2) errors
I]exit(2) terminate the calling process

COPYRIGHT

libexplain version 1.3
Copyright © 2009 Peter Miller
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