write
Hurricane Electric Internet Services
NAME
write - write to a file descriptor
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
size_t write(int fd, const char *buf, size_t count);
DESCRIPTION
write writes up to count bytes from file descriptor fd
from the buffer starting at buf.
RETURN VALUE
On success, the number of bytes written are returned (zero
indicates nothing was written). On error, -1 (or MAXINT,
as size_t is unsigned) is returned, and errno is set
appropriately.
ERRORS
EBADF fd is not a valid file descriptor or is not open
for writing.
EINVAL fd is attached to an object which is unsuitable
for writing.
EFAULT buf is outside your accessible address space.
EPIPE fd is connected to a pipe or socket whose reading
end is closed. When this happens the writing pro-
cess will receive a SIGPIPE signal; if it catches,
blocks or ignores this the error EPIPE is
returned.
EAGAIN Non-blocking I/O has been selected using O_NON-
BLOCK and there was no room in the pipe or socket
connected to fd to write the data immediately.
EINTR The call was interrupted by a signal before any
data was written.
ENOSPC The device containing the file referred to by fd
has no room for the data.
Other errors may occur, depending on the object
connected to fd.
CONFORMING TO
SVID, AT&T, POSIX, X/OPEN, BSD 4.3
SEE ALSO
open(2), read(2), fcntl(2), close(2), lseek(2), select(2),
ioctl(2), fwrite(3).
Hurricane Electric Internet Services
Copyright (C) 1998
Hurricane Electric.
All Rights Reserved.