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Overhaul process spawning

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Justine Tunney 2023-09-10 08:12:43 -07:00
parent 99dc1281f5
commit 26e254fb4d
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96 changed files with 1848 additions and 1541 deletions
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libc/calls/tcsetsid.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 2023 Justine Alexandra Roberts Tunney │
│ │
│ 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. │
│ │
│ 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. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/intrin/strace.internal.h"
#include "libc/sysv/consts/termios.h"
#include "libc/sysv/errfuns.h"
/**
* Associates session with controlling tty.
*
* @return 0 on success, or -1 w/ errno
* @raise EBADF if `fd` isn't an open file descriptor
* @raise ENOTTY if `fd` is isn't controlling teletypewriter
* @raise EINVAL if `pid` isn't session id associated with this process
* @raise EPERM if calling process isn't the session leader
* @raise ENOSYS on Windows and Bare Metal
*/
int tcsetsid(int fd, int pid) {
int rc;
if (fd < 0) {
rc = ebadf();
} else if (IsWindows() || IsMetal()) {
rc = enosys();
} else if (pid != sys_getsid(0)) {
rc = einval();
} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
rc = enotty();
} else {
rc = sys_ioctl(fd, TIOCSCTTY, 0);
}
STRACE("tcsetsid(%d, %d) → %d% m", fd, pid, rc);
return rc;
}