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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/sock/accept4-sysv.c Normal file
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/*-*- 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 │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/sock/internal.h"
#include "libc/sock/sock.h"
#define __NR_accept4_linux 0x0120 /* rhel5:enosysevil */
int accept4$sysv(int server, void *addr, uint32_t *addrsize, int flags) {
static bool once, demodernize;
int olderr, client;
if (!flags || demodernize) goto TriedAndTrue;
olderr = errno;
client = __accept4$sysv(server, addr, addrsize, flags);
if (client == -1 && errno == ENOSYS) {
errno = olderr;
TriedAndTrue:
client = fixupnewsockfd$sysv(__accept$sysv(server, addr, addrsize), flags);
} else if (SupportsLinux() && !once) {
once = true;
if (client == __NR_accept4_linux) {
demodernize = true;
goto TriedAndTrue;
}
}
if (client != -1 && IsBsd()) {
sockaddr2linux(addr);
}
return client;
}