dmi_file_write

Synopsis

#include <opendmi/utils/file.h>

ssize_t dmi_file_write(int fd, const dmi_data_t *data, size_t size);

Description

The dmi_file_write function performs a full write by looping until all requested bytes are written or a zero-length write is returned. It retries automatically if interrupted by a signal (EINTR). Fewer than size bytes are returned only if the underlying write(2) call returns zero before all bytes are written.

Parameters

fd: Open file descriptor to write to.
data: Buffer containing the data to write; must be at least size bytes.
size: Number of bytes to write.

Return value

Returns the total number of bytes written (may be less than size if a zero-length write occurs), or -1 on error with errno set accordingly.

A missing argument is not an error of the system: -1 is returned, and errno is left as it was.

Errors

DMI_ERROR_ARGUMENT_NULL: data is nullptr. The error reaches no error queue, since the function takes no context to hold it.