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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
100 lines
4.7 KiB
C
100 lines
4.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/cp.internal.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/iovec.h"
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#include "libc/calls/struct/iovec.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/sock.h"
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#include "libc/sock/struct/sockaddr.h"
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#include "libc/sock/struct/sockaddr.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Sends data over network.
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*
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* This function blocks unless MSG_DONTWAIT is passed. In that case, the
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* non-error EWOULDBLOCK might be returned. It basically means we didn't
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* wait around to learn an amount of bytes were written that we know in
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* advance are guaranteed to be atomic.
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*
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* @param fd is the file descriptor returned by socket()
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* @param buf is the data to send, which we'll copy if necessary
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* @param size is the byte-length of buf
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* @param flags can have `MSG_OOB`, `MSG_DONTROUTE`, and `MSG_DONTWAIT`
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* @param opt_addr is a binary ip:port destination override, which is
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* mandatory for UDP if connect() wasn't called
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* @param addrsize is the byte-length of addr's true polymorphic form
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* @return number of bytes transmitted, or -1 w/ errno
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* @error EINTR, EHOSTUNREACH, ECONNRESET (UDP ICMP Port Unreachable),
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* EPIPE (if MSG_NOSIGNAL), EMSGSIZE, ENOTSOCK, EFAULT, etc.
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* @cancelationpoint
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* @asyncsignalsafe
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* @restartable (unless SO_RCVTIMEO)
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*/
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ssize_t sendto(int fd, const void *buf, size_t size, int flags,
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const struct sockaddr *opt_addr, uint32_t addrsize) {
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ssize_t rc;
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uint32_t bsdaddrsize;
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union sockaddr_storage_bsd bsd;
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BEGIN_CANCELATION_POINT;
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if (IsAsan() && (!__asan_is_valid(buf, size) ||
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(opt_addr && !__asan_is_valid(opt_addr, addrsize)))) {
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rc = efault();
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} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = enotsock();
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} else if (!IsWindows()) {
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if (!IsBsd() || !opt_addr) {
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rc = sys_sendto(fd, buf, size, flags, opt_addr, addrsize);
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} else if (!(rc = sockaddr2bsd(opt_addr, addrsize, &bsd, &bsdaddrsize))) {
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rc = sys_sendto(fd, buf, size, flags, &bsd, bsdaddrsize);
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}
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} else if (__isfdopen(fd)) {
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if (__isfdkind(fd, kFdSocket)) {
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rc = sys_sendto_nt(fd, (struct iovec[]){{(void *)buf, size}}, 1, flags,
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opt_addr, addrsize);
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} else if (__isfdkind(fd, kFdFile)) {
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if (flags) {
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rc = einval();
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} else if (opt_addr) {
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rc = eisconn();
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} else {
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rc = sys_write_nt(fd, (struct iovec[]){{(void *)buf, size}}, 1, -1);
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}
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} else {
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rc = enotsock();
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}
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} else {
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rc = ebadf();
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}
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END_CANCELATION_POINT;
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DATATRACE("sendto(%d, %#.*hhs%s, %'zu, %#x, %p, %u) → %'ld% lm", fd,
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MAX(0, MIN(40, rc)), buf, rc > 40 ? "..." : "", size, flags,
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opt_addr, addrsize, rc);
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return rc;
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}
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