mirror of
https://github.com/jart/cosmopolitan.git
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53 lines
2.8 KiB
C
53 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 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/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Associates session with controlling tty.
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*
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* @return 0 on success, or -1 w/ errno
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* @raise EBADF if `fd` isn't an open file descriptor
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* @raise ENOTTY if `fd` is isn't controlling teletypewriter
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* @raise EINVAL if `pid` isn't session id associated with this process
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* @raise EPERM if calling process isn't the session leader
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* @raise ENOSYS on Windows and Bare Metal
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*/
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int tcsetsid(int fd, int pid) {
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int rc;
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if (fd < 0) {
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rc = ebadf();
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} else if (IsWindows() || IsMetal()) {
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rc = enosys();
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} else if (pid != sys_getsid(0)) {
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rc = einval();
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} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = enotty();
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} else {
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rc = sys_ioctl(fd, TIOCSCTTY, 0);
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}
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STRACE("tcsetsid(%d, %d) → %d% m", fd, pid, rc);
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return rc;
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}
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