explain_writev_or_die(3) - Linux man page
Name
explain_writev_or_die - write data from multiple buffers and report errors
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 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 0.52
Copyright © 2009 Peter Miller