315 lines
6.7 KiB
C++
315 lines
6.7 KiB
C++
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* CV 2003-09-10: Cygwin specific changes applied. Code simplified just
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* for Cygwin alone.
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*/
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#include "winsup.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <utmp.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <err.h>
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "cygtls.h"
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extern "C" int
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daemon (int nochdir, int noclose)
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{
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int fd;
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switch (fork ())
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{
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case -1:
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return -1;
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case 0:
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break;
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default:
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/* This sleep avoids a race condition which kills the
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child process if parent is started by a service process.
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FIXME: Is that still true? */
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Sleep (1000L);
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_exit (0);
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}
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if (setsid () == -1)
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return -1;
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if (!nochdir)
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chdir ("/");
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if (!noclose && (fd = open (_PATH_DEVNULL, O_RDWR, 0)) >= 0)
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{
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dup2 (fd, STDIN_FILENO);
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dup2 (fd, STDOUT_FILENO);
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dup2 (fd, STDERR_FILENO);
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if (fd > 2)
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close (fd);
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}
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return 0;
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}
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extern "C" int
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login_tty (int fd)
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{
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char *fdname;
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int newfd;
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if (setsid () == -1)
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return -1;
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if ((fdname = ttyname (fd)))
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{
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if (fd != STDIN_FILENO)
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close (STDIN_FILENO);
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if (fd != STDOUT_FILENO)
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close (STDOUT_FILENO);
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if (fd != STDERR_FILENO)
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close (STDERR_FILENO);
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newfd = open (fdname, O_RDWR);
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close (newfd);
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}
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dup2 (fd, STDIN_FILENO);
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dup2 (fd, STDOUT_FILENO);
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dup2 (fd, STDERR_FILENO);
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if (fd > 2)
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close (fd);
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return 0;
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}
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extern "C" int
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openpty (int *amaster, int *aslave, char *name, const struct termios *termp,
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const struct winsize *winp)
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{
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int master, slave;
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char pts[TTY_NAME_MAX];
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if ((master = open ("/dev/ptmx", O_RDWR | O_NOCTTY)) >= 0)
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{
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grantpt (master);
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unlockpt (master);
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__ptsname (pts, cygheap->fdtab[master]->get_minor ());
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revoke (pts);
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if ((slave = open (pts, O_RDWR | O_NOCTTY)) >= 0)
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{
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if (amaster)
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*amaster = master;
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if (name)
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strcpy (name, pts);
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if (termp)
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tcsetattr (slave, TCSAFLUSH, termp);
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if (winp)
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ioctl (slave, TIOCSWINSZ, (char *) winp);
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/* The man page doesn't say that aslave can be NULL but we have
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allowed it for years. As of 2011-11-08 we now avoid a handle
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leak in this case. */
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if (aslave)
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*aslave = slave;
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else
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close (slave);
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return 0;
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}
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close (master);
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}
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set_errno (ENOENT);
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return -1;
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}
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extern "C" int
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forkpty (int *amaster, char *name, const struct termios *termp,
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const struct winsize *winp)
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{
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int master, slave, pid;
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if (openpty (&master, &slave, name, termp, winp) == -1)
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return -1;
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switch (pid = fork ())
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{
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case -1:
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close (master);
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close (slave);
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return -1;
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case 0:
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close (master);
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login_tty (slave);
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return 0;
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}
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if (amaster)
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*amaster = master;
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close (slave);
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return pid;
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}
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extern "C" char *__progname;
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static void
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_vwarnx (const char *fmt, va_list ap)
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{
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fprintf (stderr, "%s: ", __progname);
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vfprintf (stderr, fmt, ap);
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}
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extern "C" void
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vwarn (const char *fmt, va_list ap)
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{
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_vwarnx (fmt, ap);
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fprintf (stderr, ": %s", strerror (get_errno ()));
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fputc ('\n', stderr);
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}
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extern "C" void
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vwarnx (const char *fmt, va_list ap)
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{
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_vwarnx (fmt, ap);
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fputc ('\n', stderr);
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}
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extern "C" void
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warn (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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vwarn (fmt, ap);
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va_end (ap);
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}
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extern "C" void
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warnx (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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vwarnx (fmt, ap);
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va_end (ap);
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}
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extern "C" void
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verr (int eval, const char *fmt, va_list ap)
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{
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vwarn (fmt, ap);
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exit (eval);
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}
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extern "C" void
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verrx (int eval, const char *fmt, va_list ap)
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{
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vwarnx (fmt, ap);
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exit (eval);
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}
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extern "C" void
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err (int eval, const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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vwarn (fmt, ap);
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va_end (ap);
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exit (eval);
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}
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extern "C" void
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errx (int eval, const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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vwarnx (fmt, ap);
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va_end (ap);
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exit (eval);
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}
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extern "C" const char *
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getprogname (void)
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{
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return __progname;
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}
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extern "C" void
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setprogname (const char *newprogname)
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{
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__try
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{
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/* Per BSD man page, setprogname keeps a pointer to the last
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path component of the argument. It does *not* copy the
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argument before. */
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__progname = strrchr (newprogname, '/');
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if (__progname)
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++__progname;
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else
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__progname = (char *)newprogname;
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}
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__except (EFAULT) {}
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__endtry
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}
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extern "C" void
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logwtmp (const char *line, const char *user, const char *host)
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{
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struct utmp ut;
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memset (&ut, 0, sizeof ut);
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ut.ut_type = USER_PROCESS;
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ut.ut_pid = getpid ();
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if (line)
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strncpy (ut.ut_line, line, sizeof ut.ut_line);
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time (&ut.ut_time);
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if (user)
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strncpy (ut.ut_user, user, sizeof ut.ut_user);
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if (host)
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strncpy (ut.ut_host, host, sizeof ut.ut_host);
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updwtmp (_PATH_WTMP, &ut);
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}
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extern "C" void
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login (const struct utmp *ut)
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{
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pututline (ut);
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endutent ();
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updwtmp (_PATH_WTMP, ut);
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}
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extern "C" int
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logout (const char *line)
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{
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struct utmp ut_buf, *ut;
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memset (&ut_buf, 0, sizeof ut_buf);
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strncpy (ut_buf.ut_line, line, sizeof ut_buf.ut_line);
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setutent ();
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ut = getutline (&ut_buf);
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if (ut)
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{
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ut->ut_type = DEAD_PROCESS;
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memset (ut->ut_user, 0, sizeof ut->ut_user);
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memset (ut->ut_host, 0, sizeof ut->ut_host);
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time (&ut->ut_time);
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debug_printf ("set logout time for %s", line);
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pututline (ut);
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endutent ();
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return 1;
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}
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return 0;
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}
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