util-linux-ng-2.17.2/misc-utils/script.c - nest-learning-thermostat/5.1.7/util-linux-ng - Git at Google

 /*
  * Copyright (c) 1980 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. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *	This product includes software developed by the University of
  *	California, Berkeley and its contributors.
  * 4. 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.
  */

 /*
  * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
  * - added Native Language Support
  *
  * 2000-07-30 Per Andreas Buer <per@linpro.no> - added "q"-option
  */

 /*
  * script
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <paths.h>
 #include <time.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <termios.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <sys/file.h>
 #include <signal.h>
 #include <errno.h>
 #include <string.h>
 #include <getopt.h>
 #include <unistd.h>

 #include "nls.h"


 #ifdef HAVE_LIBUTIL
 #include <pty.h>
 #endif

 void finish(int);
 void done(void);
 void fail(void);
 void resize(int);
 void fixtty(void);
 void getmaster(void);
 void getslave(void);
 void doinput(void);
 void dooutput(void);
 void doshell(void);

 char	*shell;
 FILE	*fscript;
 int	master;
 int	slave;
 int	child;
 int	subchild;
 char	*fname;

 struct	termios tt;
 struct	winsize win;
 int	lb;
 int	l;
 #ifndef HAVE_LIBUTIL
 char	line[] = "/dev/ptyXX";
 #endif
 int	aflg = 0;
 char	*cflg = NULL;
 int	fflg = 0;
 int	qflg = 0;
 int	tflg = 0;

 static char *progname;

 int die;
 int resized;

 static void
 die_if_link(char *fn) {
 	struct stat s;

 	if (lstat(fn, &s) == 0 && (S_ISLNK(s.st_mode) || s.st_nlink > 1)) {
 		fprintf(stderr,
 			_("Warning: `%s' is a link.\n"
 			  "Use `%s [options] %s' if you really "
 			  "want to use it.\n"
 			  "Script not started.\n"),
 			fn, progname, fn);
 		exit(1);
 	}
 }

 /*
  * script -t prints time delays as floating point numbers
  * The example program (scriptreplay) that we provide to handle this
  * timing output is a perl script, and does not handle numbers in
  * locale format (not even when "use locale;" is added).
  * So, since these numbers are not for human consumption, it seems
  * easiest to set LC_NUMERIC here.
  */

 int
 main(int argc, char **argv) {
 	struct sigaction sa;
 	extern int optind;
 	char *p;
 	int ch;

 	progname = argv[0];
 	if ((p = strrchr(progname, '/')) != NULL)
 		progname = p+1;


 	setlocale(LC_ALL, "");
 	setlocale(LC_NUMERIC, "C");	/* see comment above */
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

 	if (argc == 2) {
 		if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
 			printf(_("%s (%s)\n"),
 			       progname, PACKAGE_STRING);
 			return 0;
 		}
 	}

 	while ((ch = getopt(argc, argv, "ac:fqt")) != -1)
 		switch((char)ch) {
 		case 'a':
 			aflg++;
 			break;
 		case 'c':
 			cflg = optarg;
 			break;
 		case 'f':
 			fflg++;
 			break;
 		case 'q':
 			qflg++;
 			break;
 		case 't':
 			tflg++;
 			break;
 		case '?':
 		default:
 			fprintf(stderr,
 				_("usage: script [-a] [-f] [-q] [-t] [file]\n"));
 			exit(1);
 		}
 	argc -= optind;
 	argv += optind;

 	if (argc > 0)
 		fname = argv[0];
 	else {
 		fname = "typescript";
 		die_if_link(fname);
 	}
 	if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) {
 		perror(fname);
 		fail();
 	}

 	shell = getenv("SHELL");
 	if (shell == NULL)
 		shell = _PATH_BSHELL;

 	getmaster();
 	if (!qflg)
 		printf(_("Script started, file is %s\n"), fname);
 	fixtty();

 	sigemptyset(&sa.sa_mask);
 	sa.sa_flags = 0;

 	sa.sa_handler = finish;
 	sigaction(SIGCHLD, &sa, NULL);

 	child = fork();
 	if (child < 0) {
 		perror("fork");
 		fail();
 	}
 	if (child == 0) {
 		subchild = child = fork();
 		if (child < 0) {
 			perror("fork");
 			fail();
 		}
 		if (child)
 			dooutput();
 		else
 			doshell();
 	} else {
 		sa.sa_handler = resize;
 		sigaction(SIGWINCH, &sa, NULL);
 	}
 	doinput();

 	return 0;
 }

 void
 doinput() {
 	register int cc;
 	char ibuf[BUFSIZ];

 	(void) fclose(fscript);

 	if (die == 0 && child && kill(child, 0) == -1 && errno == ESRCH)
 		die = 1;

 	while (die == 0) {
 		if ((cc = read(0, ibuf, BUFSIZ)) > 0) {
 			ssize_t wrt = write(master, ibuf, cc);
 			if (wrt == -1) {
 				int err = errno;
 				fprintf (stderr, _("%s: write error %d: %s\n"),
 					progname, err, strerror(err));
 				fail();
 			}
 		}
 		else if (cc == -1 && errno == EINTR && resized)
 			resized = 0;
 		else
 			break;
 	}

 	done();
 }

 #include <sys/wait.h>

 void
 finish(int dummy) {
 	int status;
 	register int pid;

 	while ((pid = wait3(&status, WNOHANG, 0)) > 0)
 		if (pid == child)
 			die = 1;
 }

 void
 resize(int dummy) {
 	resized = 1;
 	/* transmit window change information to the child */
 	(void) ioctl(0, TIOCGWINSZ, (char *)&win);
 	(void) ioctl(slave, TIOCSWINSZ, (char *)&win);
 }

 /*
  * Stop extremely silly gcc complaint on %c:
  *  warning: `%c' yields only last 2 digits of year in some locales
  */
 static void
 my_strftime(char *buf, size_t len, const char *fmt, const struct tm *tm) {
 	strftime(buf, len, fmt, tm);
 }

 void
 dooutput() {
 	register ssize_t cc;
 	time_t tvec;
 	char obuf[BUFSIZ];
 	struct timeval tv;
 	double oldtime=time(NULL), newtime;
 	int flgs = 0;
 	ssize_t wrt;
 	size_t fwrt;

 	(void) close(0);
 #ifdef HAVE_LIBUTIL
 	(void) close(slave);
 #endif
 	tvec = time((time_t *)NULL);
 	my_strftime(obuf, sizeof obuf, "%c\n", localtime(&tvec));
 	fprintf(fscript, _("Script started on %s"), obuf);

 	if (die == 0 && child && kill(child, 0) == -1 && errno == ESRCH)
 		/*
 		 * the SIGCHLD handler could be executed when the "child"
 		 * variable is not set yet. It means that the "die" is zero
 		 * althought the child process is already done. We have to
 		 * check this thing now. Now we have the "child" variable
 		 * already initialized. For more details see main() and
 		 * finish().  --kzak 07-Aug-2007
 		 */
 		die = 1;

 	do {
 		if (die && flgs == 0) {
 			/* ..child is dead, but it doesn't mean that there is
 			 * nothing in buffers.
 			 */
 			flgs = fcntl(master, F_GETFL, 0);
 			if (fcntl(master, F_SETFL, (flgs | O_NONBLOCK)) == -1)
 				break;
 		}
 		if (tflg)
 			gettimeofday(&tv, NULL);

 		errno = 0;
 		cc = read(master, obuf, sizeof (obuf));

 		if (die && errno == EINTR && cc <= 0)
 			/* read() has been interrupted by SIGCHLD, try it again
 			 * with O_NONBLOCK
 			 */
 			continue;
 		if (cc <= 0)
 			break;
 		if (tflg) {
 			newtime = tv.tv_sec + (double) tv.tv_usec / 1000000;
 			fprintf(stderr, "%f %zd\n", newtime - oldtime, cc);
 			oldtime = newtime;
 		}
 		wrt = write(1, obuf, cc);
 		if (wrt < 0) {
 			int err = errno;
 			fprintf (stderr, _("%s: write error: %s\n"),
 				progname, strerror(err));
 			fail();
 		}
 		fwrt = fwrite(obuf, 1, cc, fscript);
 		if (fwrt < cc) {
 			int err = errno;
 			fprintf (stderr, _("%s: cannot write script file, error: %s\n"),
 				progname, strerror(err));
 			fail();
 		}
 		if (fflg)
 			(void) fflush(fscript);
 	} while(1);

 	if (flgs)
 		fcntl(master, F_SETFL, flgs);
 	done();
 }

 void
 doshell() {
 	char *shname;

 #if 0
 	int t;

 	t = open(_PATH_DEV_TTY, O_RDWR);
 	if (t >= 0) {
 		(void) ioctl(t, TIOCNOTTY, (char *)0);
 		(void) close(t);
 	}
 #endif

 	getslave();
 	(void) close(master);
 	(void) fclose(fscript);
 	(void) dup2(slave, 0);
 	(void) dup2(slave, 1);
 	(void) dup2(slave, 2);
 	(void) close(slave);

 	shname = strrchr(shell, '/');
 	if (shname)
 		shname++;
 	else
 		shname = shell;

 	if (cflg)
 		execl(shell, shname, "-c", cflg, NULL);
 	else
 		execl(shell, shname, "-i", NULL);

 	perror(shell);
 	fail();
 }

 void
 fixtty() {
 	struct termios rtt;

 	rtt = tt;
 	cfmakeraw(&rtt);
 	rtt.c_lflag &= ~ECHO;
 	(void) tcsetattr(0, TCSANOW, &rtt);
 }

 void
 fail() {

 	(void) kill(0, SIGTERM);
 	done();
 }

 void
 done() {
 	time_t tvec;

 	if (subchild) {
 		if (!qflg) {
 			char buf[BUFSIZ];
 			tvec = time((time_t *)NULL);
 			my_strftime(buf, sizeof buf, "%c\n", localtime(&tvec));
 			fprintf(fscript, _("\nScript done on %s"), buf);
 		}
 		(void) fclose(fscript);
 		(void) close(master);
 	} else {
 		(void) tcsetattr(0, TCSADRAIN, &tt);
 		if (!qflg)
 			printf(_("Script done, file is %s\n"), fname);
 	}
 	exit(0);
 }

 void
 getmaster() {
 #ifdef HAVE_LIBUTIL
 	(void) tcgetattr(0, &tt);
 	(void) ioctl(0, TIOCGWINSZ, (char *)&win);
 	if (openpty(&master, &slave, NULL, &tt, &win) < 0) {
 		fprintf(stderr, _("openpty failed\n"));
 		fail();
 	}
 #else
 	char *pty, *bank, *cp;
 	struct stat stb;

 	pty = &line[strlen("/dev/ptyp")];
 	for (bank = "pqrs"; *bank; bank++) {
 		line[strlen("/dev/pty")] = *bank;
 		*pty = '0';
 		if (stat(line, &stb) < 0)
 			break;
 		for (cp = "0123456789abcdef"; *cp; cp++) {
 			*pty = *cp;
 			master = open(line, O_RDWR);
 			if (master >= 0) {
 				char *tp = &line[strlen("/dev/")];
 				int ok;

 				/* verify slave side is usable */
 				*tp = 't';
 				ok = access(line, R_OK|W_OK) == 0;
 				*tp = 'p';
 				if (ok) {
 					(void) tcgetattr(0, &tt);
 				    	(void) ioctl(0, TIOCGWINSZ,
 						(char *)&win);
 					return;
 				}
 				(void) close(master);
 			}
 		}
 	}
 	fprintf(stderr, _("Out of pty's\n"));
 	fail();
 #endif /* not HAVE_LIBUTIL */
 }

 void
 getslave() {
 #ifndef HAVE_LIBUTIL
 	line[strlen("/dev/")] = 't';
 	slave = open(line, O_RDWR);
 	if (slave < 0) {
 		perror(line);
 		fail();
 	}
 	(void) tcsetattr(slave, TCSANOW, &tt);
 	(void) ioctl(slave, TIOCSWINSZ, (char *)&win);
 #endif
 	(void) setsid();
 	(void) ioctl(slave, TIOCSCTTY, 0);
 }
	/*
	* Copyright (c) 1980 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. All advertising materials mentioning features or use of this software
	* must display the following acknowledgement:
	* This product includes software developed by the University of
	* California, Berkeley and its contributors.
	* 4. 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.
	*/

	/*
	* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
	* - added Native Language Support
	*
	* 2000-07-30 Per Andreas Buer <per@linpro.no> - added "q"-option
	*/

	/*
	* script
	*/
	#include <stdio.h>
	#include <stdlib.h>
	#include <paths.h>
	#include <time.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <termios.h>
	#include <sys/ioctl.h>
	#include <sys/time.h>
	#include <sys/file.h>
	#include <signal.h>
	#include <errno.h>
	#include <string.h>
	#include <getopt.h>
	#include <unistd.h>

	#include "nls.h"


	#ifdef HAVE_LIBUTIL
	#include <pty.h>
	#endif

	void finish(int);
	void done(void);
	void fail(void);
	void resize(int);
	void fixtty(void);
	void getmaster(void);
	void getslave(void);
	void doinput(void);
	void dooutput(void);
	void doshell(void);

	char *shell;
	FILE *fscript;
	int master;
	int slave;
	int child;
	int subchild;
	char *fname;

	struct termios tt;
	struct winsize win;
	int lb;
	int l;
	#ifndef HAVE_LIBUTIL
	char line[] = "/dev/ptyXX";
	#endif
	int aflg = 0;
	char *cflg = NULL;
	int fflg = 0;
	int qflg = 0;
	int tflg = 0;

	static char *progname;

	int die;
	int resized;

	static void
	die_if_link(char *fn) {
	struct stat s;

	if (lstat(fn, &s) == 0 && (S_ISLNK(s.st_mode) \|\| s.st_nlink > 1)) {
	fprintf(stderr,
	_("Warning: `%s' is a link.\n"
	"Use `%s [options] %s' if you really "
	"want to use it.\n"
	"Script not started.\n"),
	fn, progname, fn);
	exit(1);
	}
	}

	/*
	* script -t prints time delays as floating point numbers
	* The example program (scriptreplay) that we provide to handle this
	* timing output is a perl script, and does not handle numbers in
	* locale format (not even when "use locale;" is added).
	* So, since these numbers are not for human consumption, it seems
	* easiest to set LC_NUMERIC here.
	*/

	int
	main(int argc, char **argv) {
	struct sigaction sa;
	extern int optind;
	char *p;
	int ch;

	progname = argv[0];
	if ((p = strrchr(progname, '/')) != NULL)
	progname = p+1;


	setlocale(LC_ALL, "");
	setlocale(LC_NUMERIC, "C"); /* see comment above */
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);

	if (argc == 2) {
	if (!strcmp(argv[1], "-V") \|\| !strcmp(argv[1], "--version")) {
	printf(_("%s (%s)\n"),
	progname, PACKAGE_STRING);
	return 0;
	}
	}

	while ((ch = getopt(argc, argv, "ac:fqt")) != -1)
	switch((char)ch) {
	case 'a':
	aflg++;
	break;
	case 'c':
	cflg = optarg;
	break;
	case 'f':
	fflg++;
	break;
	case 'q':
	qflg++;
	break;
	case 't':
	tflg++;
	break;
	case '?':
	default:
	fprintf(stderr,
	_("usage: script [-a] [-f] [-q] [-t] [file]\n"));
	exit(1);
	}
	argc -= optind;
	argv += optind;

	if (argc > 0)
	fname = argv[0];
	else {
	fname = "typescript";
	die_if_link(fname);
	}
	if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) {
	perror(fname);
	fail();
	}

	shell = getenv("SHELL");
	if (shell == NULL)
	shell = _PATH_BSHELL;

	getmaster();
	if (!qflg)
	printf(_("Script started, file is %s\n"), fname);
	fixtty();

	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;

	sa.sa_handler = finish;
	sigaction(SIGCHLD, &sa, NULL);

	child = fork();
	if (child < 0) {
	perror("fork");
	fail();
	}
	if (child == 0) {
	subchild = child = fork();
	if (child < 0) {
	perror("fork");
	fail();
	}
	if (child)
	dooutput();
	else
	doshell();
	} else {
	sa.sa_handler = resize;
	sigaction(SIGWINCH, &sa, NULL);
	}
	doinput();

	return 0;
	}

	void
	doinput() {
	register int cc;
	char ibuf[BUFSIZ];

	(void) fclose(fscript);

	if (die == 0 && child && kill(child, 0) == -1 && errno == ESRCH)
	die = 1;

	while (die == 0) {
	if ((cc = read(0, ibuf, BUFSIZ)) > 0) {
	ssize_t wrt = write(master, ibuf, cc);
	if (wrt == -1) {
	int err = errno;
	fprintf (stderr, _("%s: write error %d: %s\n"),
	progname, err, strerror(err));
	fail();
	}
	}
	else if (cc == -1 && errno == EINTR && resized)
	resized = 0;
	else
	break;
	}

	done();
	}

	#include <sys/wait.h>

	void
	finish(int dummy) {
	int status;
	register int pid;

	while ((pid = wait3(&status, WNOHANG, 0)) > 0)
	if (pid == child)
	die = 1;
	}

	void
	resize(int dummy) {
	resized = 1;
	/* transmit window change information to the child */
	(void) ioctl(0, TIOCGWINSZ, (char *)&win);
	(void) ioctl(slave, TIOCSWINSZ, (char *)&win);
	}

	/*
	* Stop extremely silly gcc complaint on %c:
	* warning: `%c' yields only last 2 digits of year in some locales
	*/
	static void
	my_strftime(char buf, size_t len, const char fmt, const struct tm *tm) {
	strftime(buf, len, fmt, tm);
	}

	void
	dooutput() {
	register ssize_t cc;
	time_t tvec;
	char obuf[BUFSIZ];
	struct timeval tv;
	double oldtime=time(NULL), newtime;
	int flgs = 0;
	ssize_t wrt;
	size_t fwrt;

	(void) close(0);
	#ifdef HAVE_LIBUTIL
	(void) close(slave);
	#endif
	tvec = time((time_t *)NULL);
	my_strftime(obuf, sizeof obuf, "%c\n", localtime(&tvec));
	fprintf(fscript, _("Script started on %s"), obuf);

	if (die == 0 && child && kill(child, 0) == -1 && errno == ESRCH)
	/*
	* the SIGCHLD handler could be executed when the "child"
	* variable is not set yet. It means that the "die" is zero
	* althought the child process is already done. We have to
	* check this thing now. Now we have the "child" variable
	* already initialized. For more details see main() and
	* finish(). --kzak 07-Aug-2007
	*/
	die = 1;

	do {
	if (die && flgs == 0) {
	/* ..child is dead, but it doesn't mean that there is
	* nothing in buffers.
	*/
	flgs = fcntl(master, F_GETFL, 0);
	if (fcntl(master, F_SETFL, (flgs \| O_NONBLOCK)) == -1)
	break;
	}
	if (tflg)
	gettimeofday(&tv, NULL);

	errno = 0;
	cc = read(master, obuf, sizeof (obuf));

	if (die && errno == EINTR && cc <= 0)
	/* read() has been interrupted by SIGCHLD, try it again
	* with O_NONBLOCK
	*/
	continue;
	if (cc <= 0)
	break;
	if (tflg) {
	newtime = tv.tv_sec + (double) tv.tv_usec / 1000000;
	fprintf(stderr, "%f %zd\n", newtime - oldtime, cc);
	oldtime = newtime;
	}
	wrt = write(1, obuf, cc);
	if (wrt < 0) {
	int err = errno;
	fprintf (stderr, _("%s: write error: %s\n"),
	progname, strerror(err));
	fail();
	}
	fwrt = fwrite(obuf, 1, cc, fscript);
	if (fwrt < cc) {
	int err = errno;
	fprintf (stderr, _("%s: cannot write script file, error: %s\n"),
	progname, strerror(err));
	fail();
	}
	if (fflg)
	(void) fflush(fscript);
	} while(1);

	if (flgs)
	fcntl(master, F_SETFL, flgs);
	done();
	}

	void
	doshell() {
	char *shname;

	#if 0
	int t;

	t = open(_PATH_DEV_TTY, O_RDWR);
	if (t >= 0) {
	(void) ioctl(t, TIOCNOTTY, (char *)0);
	(void) close(t);
	}
	#endif

	getslave();
	(void) close(master);
	(void) fclose(fscript);
	(void) dup2(slave, 0);
	(void) dup2(slave, 1);
	(void) dup2(slave, 2);
	(void) close(slave);

	shname = strrchr(shell, '/');
	if (shname)
	shname++;
	else
	shname = shell;

	if (cflg)
	execl(shell, shname, "-c", cflg, NULL);
	else
	execl(shell, shname, "-i", NULL);

	perror(shell);
	fail();
	}

	void
	fixtty() {
	struct termios rtt;

	rtt = tt;
	cfmakeraw(&rtt);
	rtt.c_lflag &= ~ECHO;
	(void) tcsetattr(0, TCSANOW, &rtt);
	}

	void
	fail() {

	(void) kill(0, SIGTERM);
	done();
	}

	void
	done() {
	time_t tvec;

	if (subchild) {
	if (!qflg) {
	char buf[BUFSIZ];
	tvec = time((time_t *)NULL);
	my_strftime(buf, sizeof buf, "%c\n", localtime(&tvec));
	fprintf(fscript, _("\nScript done on %s"), buf);
	}
	(void) fclose(fscript);
	(void) close(master);
	} else {
	(void) tcsetattr(0, TCSADRAIN, &tt);
	if (!qflg)
	printf(_("Script done, file is %s\n"), fname);
	}
	exit(0);
	}

	void
	getmaster() {
	#ifdef HAVE_LIBUTIL
	(void) tcgetattr(0, &tt);
	(void) ioctl(0, TIOCGWINSZ, (char *)&win);
	if (openpty(&master, &slave, NULL, &tt, &win) < 0) {
	fprintf(stderr, _("openpty failed\n"));
	fail();
	}
	#else
	char pty, bank, *cp;
	struct stat stb;

	pty = &line[strlen("/dev/ptyp")];
	for (bank = "pqrs"; *bank; bank++) {
	line[strlen("/dev/pty")] = *bank;
	*pty = '0';
	if (stat(line, &stb) < 0)
	break;
	for (cp = "0123456789abcdef"; *cp; cp++) {
	pty = cp;
	master = open(line, O_RDWR);
	if (master >= 0) {
	char *tp = &line[strlen("/dev/")];
	int ok;

	/* verify slave side is usable */
	*tp = 't';
	ok = access(line, R_OK\|W_OK) == 0;
	*tp = 'p';
	if (ok) {
	(void) tcgetattr(0, &tt);
	(void) ioctl(0, TIOCGWINSZ,
	(char *)&win);
	return;
	}
	(void) close(master);
	}
	}
	}
	fprintf(stderr, _("Out of pty's\n"));
	fail();
	#endif /* not HAVE_LIBUTIL */
	}

	void
	getslave() {
	#ifndef HAVE_LIBUTIL
	line[strlen("/dev/")] = 't';
	slave = open(line, O_RDWR);
	if (slave < 0) {
	perror(line);
	fail();
	}
	(void) tcsetattr(slave, TCSANOW, &tt);
	(void) ioctl(slave, TIOCSWINSZ, (char *)&win);
	#endif
	(void) setsid();
	(void) ioctl(slave, TIOCSCTTY, 0);
	}