cosmopolitan/libc/calls/write.c

36 lines
2.4 KiB
C
Raw Normal View History

2020-06-15 14:18:57 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
2020-12-28 01:18:44 +00:00
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
2020-06-15 14:18:57 +00:00
2020-12-28 01:18:44 +00:00
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
2020-06-15 14:18:57 +00:00
*/
#include "libc/calls/struct/iovec.h"
#include "libc/sock/sock.h"
2020-06-15 14:18:57 +00:00
/**
* Writes data to file descriptor.
*
* @param fd is something open()'d earlier
* @param buf is copied from, cf. copy_file_range(), sendfile(), etc.
* @param size in range [1..0x7ffff000] is reasonable
* @return [1..size] bytes on success, or -1 w/ errno; noting zero is
* impossible unless size was passed as zero to do an error check
* @see read(), pwrite(), writev(), SIGPIPE
* @asyncsignalsafe
*/
ssize_t write(int fd, const void *buf, size_t size) {
return writev(fd, &(struct iovec){buf, size}, 1);
2020-06-15 14:18:57 +00:00
}