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| explain_writev_or_die(3) | FreeBSD Library Functions Manual | explain_writev_or_die(3) |
NAME
explain_writev_or_die - write data from multiple buffers and report errorsSYNOPSIS
#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 explain_writev_or_die function is used to call the writev(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_writev(3) function, and then the process terminates by calling exit(EXIT_FAILURE).The explain_writev_on_error function is used to call the writev(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_writev(3) function, but still returns to the caller.
- fildes
- The fildes, exactly as to be passed to the writev(2) system call.
- data
- The data, exactly as to be passed to the writev(2) system call.
- data_size
- The data_size, exactly as to be passed to the writev(2) system call.
RETURN VALUE
The explain_writev_or_die function only returns on success, see writev(2) for more information. On failure, prints an explanation and exits, it does not return.The explain_writev_on_error function always returns the value return by the wrapped writev(2) system call.
EXAMPLE
The 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
- writev(2)
- write data from multiple buffers
- explain_writev(3)
- explain writev(2) errors
- exit(2)
- terminate the calling process
COPYRIGHT
libexplain version 1.3Copyright (C) 2009 Peter Miller
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