RTEMS 4.9.5 On-Line Library

Input and Output Primitives Manager write - Writes to a file

RTEMS POSIX API User's Guide

5.4.6: write - Writes to a file

CALLING SEQUENCE:

#include <unistd.h>

int write(
  int           fildes,
  const void   *buf,
  unsigned int  nbytes
);

STATUS CODES:

EAGAIN: The O_NONBLOCK flag is set for a file descriptor and the process would be delayed in the I/O operation.
EBADF: Invalid file descriptor
EFBIG: An attempt was made to write to a file that exceeds the maximum file size
EINTR: The function was interrupted by a signal.
EIO: Input or output error.
ENOSPC: No space left on disk.
EPIPE: Attempt to write to a pope or FIFO with no reader.
EINVAL: Bad buffer pointer

DESCRIPTION:

The write() function writes nbyte from the array pointed to by buf into the file associated with fildes.

If nybte is zero and the file is a regular file, the write() function returns zero and has no other effect. If nbyte is zero and the file is a special file, te results are not portable.

The write() function returns the number of bytes written. This number will be less than nbytes if there is an error. It will never be greater than nbytes.

NOTES:

NONE

RTEMS POSIX API User's Guide