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Diffstat (limited to 'winsup/cygwin/libc/bsdlib.cc')
| -rw-r--r-- | winsup/cygwin/libc/bsdlib.cc | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/winsup/cygwin/libc/bsdlib.cc b/winsup/cygwin/libc/bsdlib.cc new file mode 100644 index 000000000..acf43adbf --- /dev/null +++ b/winsup/cygwin/libc/bsdlib.cc @@ -0,0 +1,165 @@ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * CV 2003-09-10: Cygwin specific changes applied. Code simplified just + * for Cygwin alone. + */ + +#include "winsup.h" +#include <stdlib.h> +#include <utmp.h> +#include <unistd.h> +#include <sys/termios.h> +#include <sys/ioctl.h> +#include <fcntl.h> +#include "cygerrno.h" + +extern "C" int +daemon (int nochdir, int noclose) +{ + int fd; + + switch (fork ()) + { + case -1: + return -1; + case 0: + if (!wincap.is_winnt ()) + { + /* Register as service under 9x/Me which allows to close + the parent window with the daemon still running. + This function only exists on 9x/Me and is autoloaded + so it fails silently on NT. */ + DWORD WINAPI RegisterServiceProcess (DWORD, DWORD); + RegisterServiceProcess (0, 1); + } + break; + default: + /* This sleep avoids a race condition which kills the + child process if parent is started by a NT/W2K service. + FIXME: Is that still true? */ + Sleep (1000L); + _exit (0); + } + if (setsid () == -1) + return -1; + if (!nochdir) + chdir ("/"); + if (!noclose && (fd = open (_PATH_DEVNULL, O_RDWR, 0)) >= 0) + { + dup2 (fd, STDIN_FILENO); + dup2 (fd, STDOUT_FILENO); + dup2 (fd, STDERR_FILENO); + if (fd > 2) + close (fd); + } + return 0; +} + +extern "C" int +login_tty (int fd) +{ + char *fdname; + int newfd; + + if (setsid () == -1) + return -1; + if ((fdname = ttyname (fd))) + { + if (fd != STDIN_FILENO) + close (STDIN_FILENO); + if (fd != STDOUT_FILENO) + close (STDOUT_FILENO); + if (fd != STDERR_FILENO) + close (STDERR_FILENO); + newfd = open (fdname, O_RDWR); + close (newfd); + } + dup2 (fd, STDIN_FILENO); + dup2 (fd, STDOUT_FILENO); + dup2 (fd, STDERR_FILENO); + if (fd > 2) + close (fd); + return 0; +} + +extern "C" int +openpty (int *amaster, int *aslave, char *name, struct termios *termp, + struct winsize *winp) +{ + int master, slave; + char pts[MAX_PATH]; + + if ((master = open ("/dev/ptmx", O_RDWR | O_NOCTTY)) >= 0) + { + grantpt (master); + unlockpt (master); + strcpy (pts, ptsname (master)); + revoke (pts); + if ((slave = open (pts, O_RDWR | O_NOCTTY)) >= 0) + { + if (amaster) + *amaster = master; + if (aslave) + *aslave = slave; + if (name) + strcpy (name, pts); + if (termp) + tcsetattr (slave, TCSAFLUSH, termp); + if (winp) + ioctl (slave, TIOCSWINSZ, (char *) winp); + return 0; + } + close (master); + } + set_errno (ENOENT); + return -1; +} + +extern "C" int +forkpty (int *amaster, char *name, struct termios *termp, struct winsize *winp) +{ + int master, slave, pid; + + if (openpty (&master, &slave, name, termp, winp) == -1) + return -1; + switch (pid = fork ()) + { + case -1: + return -1; + case 0: + close (master); + login_tty (slave); + return 0; + } + if (amaster) + *amaster = master; + close (slave); + return pid; +} + |