/*
* 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/stat.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <stddef.h>
#include "closestream.h"
#include "nls.h"
#include "c.h"
#if defined(HAVE_LIBUTIL) && defined(HAVE_PTY_H)
# include <pty.h>
#endif
#ifdef HAVE_LIBUTEMPTER
# include <utempter.h>
#endif
#define DEFAULT_OUTPUT "typescript"
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(FILE *timingfd);
void doshell(void);
char *shell;
FILE *fscript;
int master = -1;
int slave;
pid_t child;
pid_t subchild;
int childstatus;
char *fname;
struct termios tt;
struct winsize win;
int lb;
int l;
#if !HAVE_LIBUTIL || !HAVE_PTY_H
char line[] = "/dev/ptyXX";
#endif
int aflg = 0;
char *cflg = NULL;
int eflg = 0;
int fflg = 0;
int qflg = 0;
int tflg = 0;
int forceflg = 0;
int die;
int resized;
static void
die_if_link(char *fn) {
struct stat s;
if (forceflg)
return;
if (lstat(fn, &s) == 0 && (S_ISLNK(s.st_mode) || s.st_nlink > 1))
errx(EXIT_FAILURE,
_("output file `%s' is a link\n"
"Use --force if you really want to use it.\n"
"Program not started."), fn);
}
static void __attribute__((__noreturn__))
usage(FILE *out)
{
fputs(_("\nUsage:\n"), out);
fprintf(out,
_(" %s [options] [file]\n"), program_invocation_short_name);
fputs(_("\nOptions:\n"), out);
fputs(_(" -a, --append append the output\n"
" -c, --command <command> run command rather than interactive shell\n"
" -e, --return return exit code of the child process\n"
" -f, --flush run flush after each write\n"
" --force use output file even when it is a link\n"
" -q, --quiet be quiet\n"
" -t, --timing[=<file>] output timing data to stderr (or to FILE)\n"
" -V, --version output version information and exit\n"
" -h, --help display this help and exit\n\n"), out);
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
/*
* 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) {
sigset_t block_mask, unblock_mask;
struct sigaction sa;
int ch;
FILE *timingfd = NULL;
enum { FORCE_OPTION = CHAR_MAX + 1 };
static const struct option longopts[] = {
{ "append", no_argument, NULL, 'a' },
{ "command", required_argument, NULL, 'c' },
{ "return", no_argument, NULL, 'e' },
{ "flush", no_argument, NULL, 'f' },
{ "force", no_argument, NULL, FORCE_OPTION, },
{ "quiet", no_argument, NULL, 'q' },
{ "timing", optional_argument, NULL, 't' },
{ "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
setlocale(LC_ALL, "");
setlocale(LC_NUMERIC, "C"); /* see comment above */
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((ch = getopt_long(argc, argv, "ac:efqt::Vh", longopts, NULL)) != -1)
switch(ch) {
case 'a':
aflg = 1;
break;
case 'c':
cflg = optarg;
break;
case 'e':
eflg = 1;
break;
case 'f':
fflg = 1;
break;
case FORCE_OPTION:
forceflg = 1;
break;
case 'q':
qflg = 1;
break;
case 't':
if (optarg)
if ((timingfd = fopen(optarg, "w")) == NULL)
err(EXIT_FAILURE, _("cannot open %s"), optarg);
tflg = 1;
break;
case 'V':
printf(_("%s from %s\n"), program_invocation_short_name,
PACKAGE_STRING);
exit(EXIT_SUCCESS);
break;
case 'h':
usage(stdout);
break;
case '?':
default:
usage(stderr);
}
argc -= optind;
argv += optind;
if (argc > 0)
fname = argv[0];
else {
fname = DEFAULT_OUTPUT;
die_if_link(fname);
}
if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) {
warn(_("cannot open %s"), fname);
fail();
}
shell = getenv("SHELL");
if (shell == NULL)
shell = _PATH_BSHELL;
getmaster();
if (!qflg)
printf(_("Script started, file is %s\n"), fname);
fixtty();
#ifdef HAVE_LIBUTEMPTER
utempter_add_record(master, NULL);
#endif
/* setup SIGCHLD handler */
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = finish;
sigaction(SIGCHLD, &sa, NULL);
/* init mask for SIGCHLD */
sigprocmask(SIG_SETMASK, NULL, &block_mask);
sigaddset(&block_mask, SIGCHLD);
sigprocmask(SIG_SETMASK, &block_mask, &unblock_mask);
child = fork();
sigprocmask(SIG_SETMASK, &unblock_mask, NULL);
if (child < 0) {
warn(_("fork failed"));
fail();
}
if (child == 0) {
sigprocmask(SIG_SETMASK, &block_mask, NULL);
subchild = child = fork();
sigprocmask(SIG_SETMASK, &unblock_mask, NULL);
if (child < 0) {
warn(_("fork failed"));
fail();
}
if (child) {
if (!timingfd)
timingfd = fdopen(STDERR_FILENO, "w");
dooutput(timingfd);
} else
doshell();
} else {
sa.sa_handler = resize;
sigaction(SIGWINCH, &sa, NULL);
}
doinput();
if (close_stream(timingfd) != 0)
errx(EXIT_FAILURE, _("write error"));
return EXIT_SUCCESS;
}
void __attribute__((__noreturn__))
doinput(void) {
ssize_t cc;
char ibuf[BUFSIZ];
if (close_stream(fscript) != 0)
errx(EXIT_FAILURE, _("write error"));
while (die == 0) {
if ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0) {
ssize_t wrt = write(master, ibuf, cc);
if (wrt < 0) {
warn (_("write failed"));
fail();
}
}
else if (cc < 0 && errno == EINTR && resized)
resized = 0;
else
break;
}
done();
}
#include <sys/wait.h>
void
finish(int dummy __attribute__ ((__unused__))) {
int status;
pid_t pid;
while ((pid = wait3(&status, WNOHANG, 0)) > 0)
if (pid == child) {
childstatus = status;
die = 1;
}
}
void
resize(int dummy __attribute__ ((__unused__))) {
resized = 1;
/* transmit window change information to the child */
ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&win);
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 __attribute__((__noreturn__))
dooutput(FILE *timingfd) {
ssize_t cc;
time_t tvec;
char obuf[BUFSIZ];
struct timeval tv;
double oldtime=time(NULL), newtime;
int flgs = 0;
ssize_t wrt;
ssize_t fwrt;
close(STDIN_FILENO);
#ifdef HAVE_LIBUTIL
close(slave);
#endif
tvec = time((time_t *)NULL);
my_strftime(obuf, sizeof obuf, "%c\n", localtime(&tvec));
fprintf(fscript, _("Script started on %s"), obuf);
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(timingfd, "%f %zd\n", newtime - oldtime, cc);
oldtime = newtime;
}
wrt = write(STDOUT_FILENO, obuf, cc);
if (wrt < 0) {
warn (_("write failed"));
fail();
}
fwrt = fwrite(obuf, 1, cc, fscript);
if (fwrt < cc) {
warn (_("cannot write script file"));
fail();
}
if (fflg)
fflush(fscript);
} while(1);
if (flgs)
fcntl(master, F_SETFL, flgs);
if (close_stream(timingfd) != 0)
errx(EXIT_FAILURE, _("write error"));
done();
}
void __attribute__((__noreturn__))
doshell(void) {
char *shname;
getslave();
close(master);
if (close_stream(fscript) != 0)
errx(EXIT_FAILURE, _("write error"));
dup2(slave, STDIN_FILENO);
dup2(slave, STDOUT_FILENO);
dup2(slave, STDERR_FILENO);
close(slave);
master = -1;
shname = strrchr(shell, '/');
if (shname)
shname++;
else
shname = shell;
/*
* When invoked from within /etc/csh.login, script spawns a csh shell
* that spawns programs that cannot be killed with a SIGTERM. This is
* because csh has a documented behaviour wherein it disables all
* signals when processing the /etc/csh.* files.
*
* Let's restore the default behavior.
*/
signal(SIGTERM, SIG_DFL);
if (cflg)
execl(shell, shname, "-c", cflg, NULL);
else
execl(shell, shname, "-i", NULL);
warn(_("failed to execute %s"), shell);
fail();
}
void
fixtty(void) {
struct termios rtt;
rtt = tt;
cfmakeraw(&rtt);
rtt.c_lflag &= ~ECHO;
tcsetattr(STDIN_FILENO, TCSANOW, &rtt);
}
void __attribute__((__noreturn__))
fail(void) {
kill(0, SIGTERM);
done();
}
void __attribute__((__noreturn__))
done(void) {
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);
}
if (close_stream(fscript) != 0)
errx(EXIT_FAILURE, _("write error"));
close(master);
master = -1;
} else {
tcsetattr(STDIN_FILENO, TCSADRAIN, &tt);
if (!qflg)
printf(_("Script done, file is %s\n"), fname);
#ifdef HAVE_LIBUTEMPTER
if (master >= 0)
utempter_remove_record(master);
#endif
}
if(eflg) {
if (WIFSIGNALED(childstatus))
exit(WTERMSIG(childstatus) + 0x80);
else
exit(WEXITSTATUS(childstatus));
}
exit(EXIT_SUCCESS);
}
void
getmaster(void) {
#if defined(HAVE_LIBUTIL) && defined(HAVE_PTY_H)
tcgetattr(STDIN_FILENO, &tt);
ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&win);
if (openpty(&master, &slave, NULL, &tt, &win) < 0) {
warn(_("openpty failed"));
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) {
tcgetattr(STDIN_FILENO, &tt);
ioctl(STDIN_FILENO, TIOCGWINSZ,
(char *)&win);
return;
}
close(master);
master = -1;
}
}
}
master = -1;
warn(_("out of pty's"));
fail();
#endif /* not HAVE_LIBUTIL */
}
void
getslave(void) {
#ifndef HAVE_LIBUTIL
line[strlen("/dev/")] = 't';
slave = open(line, O_RDWR);
if (slave < 0) {
warn(_("cannot open %s"), line);
fail();
}
tcsetattr(slave, TCSANOW, &tt);
ioctl(slave, TIOCSWINSZ, (char *)&win);
#endif
setsid();
ioctl(slave, TIOCSCTTY, 0);
}
