/*
* 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_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);
}
