2020-06-15 14:18:57 +00:00
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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2023-12-05 22:37:54 +00:00
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│ vi: set noet ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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2020-06-15 14:18:57 +00:00
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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2020-12-28 01:18:44 +00:00
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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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2020-06-15 14:18:57 +00:00
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│ │
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2020-12-28 01:18:44 +00:00
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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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2020-06-15 14:18:57 +00:00
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╚─────────────────────────────────────────────────────────────────────────────*/
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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#include "libc/assert.h"
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#include "libc/calls/syscall-sysv.internal.h"
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2020-06-15 14:18:57 +00:00
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/sock/internal.h"
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#include "libc/sock/sock.h"
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2022-08-13 20:11:56 +00:00
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#include "libc/sock/struct/sockaddr.internal.h"
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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#include "libc/sysv/consts/f.h"
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#include "libc/sysv/consts/fd.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/sock.h"
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2023-07-23 23:31:10 +00:00
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#include "libc/sysv/errfuns.h"
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2020-06-15 14:18:57 +00:00
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2023-07-23 23:31:10 +00:00
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int sys_accept4(int server, struct sockaddr_storage *addr, int flags) {
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uint32_t size = sizeof(*addr);
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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int olderr, client, file_mode;
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2020-06-15 14:18:57 +00:00
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olderr = errno;
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2023-07-23 23:31:10 +00:00
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client = __sys_accept4(server, addr, &size, flags);
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2020-06-15 14:18:57 +00:00
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if (client == -1 && errno == ENOSYS) {
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2023-07-23 23:31:10 +00:00
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// XNU/RHEL5/etc. don't support accept4(), but it's easilly polyfilled
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2020-06-15 14:18:57 +00:00
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errno = olderr;
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2023-07-23 23:31:10 +00:00
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if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) return einval();
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if ((client = __sys_accept(server, addr, &size, 0)) != -1) {
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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// __sys_accept() has inconsistent flag inheritence across platforms
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2023-07-23 23:31:10 +00:00
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// this is one of the issues that accept4() was invented for solving
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2023-07-26 20:54:49 +00:00
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unassert((file_mode = __sys_fcntl(client, F_GETFD)) != -1);
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unassert(!__sys_fcntl(client, F_SETFD,
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((file_mode & ~FD_CLOEXEC) |
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(flags & SOCK_CLOEXEC ? FD_CLOEXEC : 0))));
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unassert((file_mode = __sys_fcntl(client, F_GETFL)) != -1);
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unassert(!__sys_fcntl(client, F_SETFL,
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((file_mode & ~O_NONBLOCK) |
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(flags & SOCK_NONBLOCK ? O_NONBLOCK : 0))));
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Support non-blocking i/o across platforms
This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:
socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs
This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
2023-07-23 09:56:47 +00:00
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}
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2020-06-15 14:18:57 +00:00
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}
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return client;
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}
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