Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1074 insertions, 0 deletions

diff --git a/term-utils/script.c b/term-utils/script.c
new file mode 100644
index 0000000..c918ecd
--- /dev/null
+++ b/term-utils/script.c
@@ -0,0 +1,1074 @@
+/*
+ * Copyright (C) 1980      Regents of the University of California.
+ * Copyright (C) 2013-2019 Karel Zak <kzak@redhat.com>
+ *
+ * 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.
+ */
+#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 <sys/wait.h>
+#include <poll.h>
+#include <sys/signalfd.h>
+#include <assert.h>
+#include <inttypes.h>
+
+#include "closestream.h"
+#include "nls.h"
+#include "c.h"
+#include "ttyutils.h"
+#include "all-io.h"
+#include "monotonic.h"
+#include "timeutils.h"
+#include "strutils.h"
+#include "xalloc.h"
+#include "optutils.h"
+#include "signames.h"
+#include "pty-session.h"
+#include "debug.h"
+
+static UL_DEBUG_DEFINE_MASK(script);
+UL_DEBUG_DEFINE_MASKNAMES(script) = UL_DEBUG_EMPTY_MASKNAMES;
+
+#define SCRIPT_DEBUG_INIT	(1 << 1)
+#define SCRIPT_DEBUG_PTY	(1 << 2)
+#define SCRIPT_DEBUG_IO		(1 << 3)
+#define SCRIPT_DEBUG_SIGNAL	(1 << 4)
+#define SCRIPT_DEBUG_MISC	(1 << 5)
+#define SCRIPT_DEBUG_ALL	0xFFFF
+
+#define DBG(m, x)       __UL_DBG(script, SCRIPT_DEBUG_, m, x)
+#define ON_DBG(m, x)    __UL_DBG_CALL(script, SCRIPT_DEBUG_, m, x)
+
+#ifdef HAVE_LIBUTEMPTER
+# include <utempter.h>
+#endif
+
+#define DEFAULT_TYPESCRIPT_FILENAME "typescript"
+
+/*
+ * Script is driven by stream (stdout/stdin) activity. It's possible to
+ * associate arbitrary number of log files with the stream. We have two basic
+ * types of log files: "timing file" (simple or multistream) and "data file"
+ * (raw).
+ *
+ * The same log file maybe be shared between both streams. For example
+ * multi-stream timing file is possible to use for stdin as well as for stdout.
+ */
+enum {
+	SCRIPT_FMT_RAW = 1,		/* raw slave/master data */
+	SCRIPT_FMT_TIMING_SIMPLE,	/* (classic) in format "<delta> <offset>" */
+	SCRIPT_FMT_TIMING_MULTI,	/* (advanced) multiple streams in format "<type> <delta> <offset|etc> */
+};
+
+struct script_log {
+	FILE	*fp;			/* file pointer (handler) */
+	int	format;			/* SCRIPT_FMT_* */
+	char	*filename;		/* on command line specified name */
+	struct timeval oldtime;		/* previous entry log time (SCRIPT_FMT_TIMING_* only) */
+	struct timeval starttime;
+
+	unsigned int	initialized : 1;
+};
+
+struct script_stream {
+	struct script_log **logs;	/* logs where to write data from stream */
+	size_t nlogs;			/* number of logs */
+	char ident;			/* stream identifier */
+};
+
+struct script_control {
+	uint64_t outsz;		/* current output files size */
+	uint64_t maxsz;		/* maximum output files size */
+
+	struct script_stream	out;	/* output */
+	struct script_stream	in;	/* input */
+
+	struct script_log	*siglog;	/* log for signal entries */
+	struct script_log	*infolog;	/* log for info entries */
+
+	const char *ttyname;
+	const char *ttytype;
+	const char *command;
+	char *command_norm;	/* normalized (without \n) */
+	int ttycols;
+	int ttylines;
+
+	struct ul_pty *pty;	/* pseudo-terminal */
+	pid_t child;		/* child pid */
+	int childstatus;	/* child process exit value */
+
+	unsigned int
+	 append:1,		/* append output */
+	 rc_wanted:1,		/* return child exit value */
+	 flush:1,		/* flush after each write */
+	 quiet:1,		/* suppress most output */
+	 force:1,		/* write output to links */
+	 isterm:1;		/* is child process running as terminal */
+};
+
+static ssize_t log_info(struct script_control *ctl, const char *name, const char *msgfmt, ...)
+			__attribute__((__format__ (__printf__, 3, 4)));
+
+static void script_init_debug(void)
+{
+	__UL_INIT_DEBUG_FROM_ENV(script, SCRIPT_DEBUG_, 0, SCRIPT_DEBUG);
+}
+
+static void init_terminal_info(struct script_control *ctl)
+{
+	if (ctl->ttyname || !ctl->isterm)
+		return;		/* already initialized */
+
+	get_terminal_dimension(&ctl->ttycols, &ctl->ttylines);
+	get_terminal_name(&ctl->ttyname, NULL, NULL);
+	get_terminal_type(&ctl->ttytype);
+}
+
+/*
+ * For tests we want to be able to control time output
+ */
+#ifdef TEST_SCRIPT
+static inline time_t script_time(time_t *t)
+{
+	const char *str = getenv("SCRIPT_TEST_SECOND_SINCE_EPOCH");
+	int64_t sec;
+
+	if (!str || sscanf(str, "%"SCNi64, &sec) != 1)
+		return time(t);
+	if (t)
+		*t = (time_t)sec;
+	return (time_t)sec;
+}
+#else	/* !TEST_SCRIPT */
+# define script_time(x) time(x)
+#endif
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out, _(" %s [options] [file]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Make a typescript of a terminal session.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -I, --log-in <file>           log stdin to file\n"), out);
+	fputs(_(" -O, --log-out <file>          log stdout to file (default)\n"), out);
+	fputs(_(" -B, --log-io <file>           log stdin and stdout to file\n"), out);
+	fputs(USAGE_SEPARATOR, out);
+
+	fputs(_(" -T, --log-timing <file>       log timing information to file\n"), out);
+	fputs(_(" -t[<file>], --timing[=<file>] deprecated alias to -T (default file is stderr)\n"), out);
+	fputs(_(" -m, --logging-format <name>   force to 'classic' or 'advanced' format\n"), out);
+	fputs(USAGE_SEPARATOR, out);
+
+	fputs(_(" -a, --append                  append to the log file\n"), out);
+	fputs(_(" -c, --command <command>       run command rather than interactive shell\n"), out);
+	fputs(_(" -e, --return                  return exit code of the child process\n"), out);
+	fputs(_(" -f, --flush                   run flush after each write\n"), out);
+	fputs(_("     --force                   use output file even when it is a link\n"), out);
+	fputs(_(" -E, --echo <when>             echo input in session (auto, always or never)\n"), out);
+	fputs(_(" -o, --output-limit <size>     terminate if output files exceed size\n"), out);
+	fputs(_(" -q, --quiet                   be quiet\n"), out);
+
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(31));
+	printf(USAGE_MAN_TAIL("script(1)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+static struct script_log *get_log_by_name(struct script_stream *stream,
+					  const char *name)
+{
+	size_t i;
+
+	for (i = 0; i < stream->nlogs; i++) {
+		struct script_log *log = stream->logs[i];
+		if (strcmp(log->filename, name) == 0)
+			return log;
+	}
+	return NULL;
+}
+
+static struct script_log *log_associate(struct script_control *ctl,
+					struct script_stream *stream,
+					const char *filename, int format)
+{
+	struct script_log *log;
+
+	DBG(MISC, ul_debug("associate %s with stream", filename));
+
+	assert(ctl);
+	assert(filename);
+	assert(stream);
+
+	log = get_log_by_name(stream, filename);
+	if (log)
+		return log;	/* already defined */
+
+	log = get_log_by_name(stream == &ctl->out ? &ctl->in : &ctl->out, filename);
+	if (!log) {
+		/* create a new log */
+		log = xcalloc(1, sizeof(*log));
+		log->filename = xstrdup(filename);
+		log->format = format;
+	}
+
+	/* add log to the stream */
+	stream->logs = xrealloc(stream->logs,
+			(stream->nlogs + 1) * sizeof(log));
+	stream->logs[stream->nlogs] = log;
+	stream->nlogs++;
+
+	/* remember where to write info about signals */
+	if (format == SCRIPT_FMT_TIMING_MULTI) {
+		if (!ctl->siglog)
+			ctl->siglog = log;
+		if (!ctl->infolog)
+			ctl->infolog = log;
+	}
+
+	return log;
+}
+
+static int log_close(struct script_control *ctl,
+		      struct script_log *log,
+		      const char *msg,
+		      int status)
+{
+	int rc = 0;
+
+	if (!log || !log->initialized)
+		return 0;
+
+	DBG(MISC, ul_debug("closing %s", log->filename));
+
+	switch (log->format) {
+	case SCRIPT_FMT_RAW:
+	{
+		char buf[FORMAT_TIMESTAMP_MAX];
+		time_t tvec = script_time((time_t *)NULL);
+
+		strtime_iso(&tvec, ISO_TIMESTAMP, buf, sizeof(buf));
+		if (msg)
+			fprintf(log->fp, _("\nScript done on %s [<%s>]\n"), buf, msg);
+		else
+			fprintf(log->fp, _("\nScript done on %s [COMMAND_EXIT_CODE=\"%d\"]\n"), buf, status);
+		break;
+	}
+	case SCRIPT_FMT_TIMING_MULTI:
+	{
+		struct timeval now = { 0 }, delta = { 0 };
+
+		gettime_monotonic(&now);
+		timersub(&now, &log->starttime, &delta);
+
+		log_info(ctl, "DURATION", "%"PRId64".%06"PRId64,
+			(int64_t)delta.tv_sec,
+			(int64_t)delta.tv_usec);
+		log_info(ctl, "EXIT_CODE", "%d", status);
+		break;
+	}
+	case SCRIPT_FMT_TIMING_SIMPLE:
+		break;
+	}
+
+	if (close_stream(log->fp) != 0) {
+		warn(_("write failed: %s"), log->filename);
+		rc = -errno;
+	}
+
+	free(log->filename);
+	memset(log, 0, sizeof(*log));
+
+	return rc;
+}
+
+static int log_flush(struct script_control *ctl __attribute__((__unused__)), struct script_log *log)
+{
+
+	if (!log || !log->initialized)
+		return 0;
+
+	DBG(MISC, ul_debug("flushing %s", log->filename));
+
+	fflush(log->fp);
+	return 0;
+}
+
+static void log_free(struct script_control *ctl, struct script_log *log)
+{
+	size_t i;
+
+	if (!log)
+		return;
+
+	/* the same log is possible to reference from more places, remove all
+	 * (TODO: maybe use include/list.h to make it more elegant)
+	 */
+	if (ctl->siglog == log)
+		ctl->siglog = NULL;
+	else if (ctl->infolog == log)
+		ctl->infolog = NULL;
+
+	for (i = 0; i < ctl->out.nlogs; i++) {
+		if (ctl->out.logs[i] == log)
+			ctl->out.logs[i] = NULL;
+	}
+	for (i = 0; i < ctl->in.nlogs; i++) {
+		if (ctl->in.logs[i] == log)
+			ctl->in.logs[i] = NULL;
+	}
+	free(log);
+}
+
+static int log_start(struct script_control *ctl,
+		      struct script_log *log)
+{
+	if (log->initialized)
+		return 0;
+
+	DBG(MISC, ul_debug("opening %s", log->filename));
+
+	assert(log->fp == NULL);
+
+	/* open the log */
+	log->fp = fopen(log->filename,
+			ctl->append && log->format == SCRIPT_FMT_RAW ?
+			"a" UL_CLOEXECSTR :
+			"w" UL_CLOEXECSTR);
+	if (!log->fp) {
+		warn(_("cannot open %s"), log->filename);
+		return -errno;
+	}
+
+	/* write header, etc. */
+	switch (log->format) {
+	case SCRIPT_FMT_RAW:
+	{
+		int x = 0;
+		char buf[FORMAT_TIMESTAMP_MAX];
+		time_t tvec = script_time((time_t *)NULL);
+
+		strtime_iso(&tvec, ISO_TIMESTAMP, buf, sizeof(buf));
+		fprintf(log->fp, _("Script started on %s ["), buf);
+
+		if (ctl->command)
+			x += fprintf(log->fp, "COMMAND=\"%s\"", ctl->command_norm);
+
+		if (ctl->isterm) {
+			init_terminal_info(ctl);
+
+			if (ctl->ttytype)
+				x += fprintf(log->fp, "%*sTERM=\"%s\"", !!x, "", ctl->ttytype);
+			if (ctl->ttyname)
+				x += fprintf(log->fp, "%*sTTY=\"%s\"", !!x, "", ctl->ttyname);
+
+			x += fprintf(log->fp, "%*sCOLUMNS=\"%d\" LINES=\"%d\"", !!x, "",
+					ctl->ttycols, ctl->ttylines);
+		} else
+			fprintf(log->fp, _("%*s<not executed on terminal>"), !!x, "");
+
+		fputs("]\n", log->fp);
+		break;
+	}
+	case SCRIPT_FMT_TIMING_SIMPLE:
+	case SCRIPT_FMT_TIMING_MULTI:
+		gettime_monotonic(&log->oldtime);
+		gettime_monotonic(&log->starttime);
+		break;
+	}
+
+	log->initialized = 1;
+	return 0;
+}
+
+static int logging_start(struct script_control *ctl)
+{
+	size_t i;
+
+	/* start all output logs */
+	for (i = 0; i < ctl->out.nlogs; i++) {
+		int rc = log_start(ctl, ctl->out.logs[i]);
+		if (rc)
+			return rc;
+	}
+
+	/* start all input logs */
+	for (i = 0; i < ctl->in.nlogs; i++) {
+		int rc = log_start(ctl, ctl->in.logs[i]);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
+static ssize_t log_write(struct script_control *ctl,
+		      struct script_stream *stream,
+		      struct script_log *log,
+		      char *obuf, size_t bytes)
+{
+	int rc;
+	ssize_t ssz = 0;
+	struct timeval now, delta;
+
+	if (!log->fp)
+		return 0;
+
+	DBG(IO, ul_debug(" writing [file=%s]", log->filename));
+
+	switch (log->format) {
+	case SCRIPT_FMT_RAW:
+		DBG(IO, ul_debug("  log raw data"));
+		rc = fwrite_all(obuf, 1, bytes, log->fp);
+		if (rc) {
+			warn(_("cannot write %s"), log->filename);
+			return rc;
+		}
+		ssz = bytes;
+		break;
+
+	case SCRIPT_FMT_TIMING_SIMPLE:
+		DBG(IO, ul_debug("  log timing info"));
+
+		gettime_monotonic(&now);
+		timersub(&now, &log->oldtime, &delta);
+		ssz = fprintf(log->fp, "%"PRId64".%06"PRId64" %zd\n",
+			(int64_t)delta.tv_sec, (int64_t)delta.tv_usec, bytes);
+		if (ssz < 0)
+			return -errno;
+
+		log->oldtime = now;
+		break;
+
+	case SCRIPT_FMT_TIMING_MULTI:
+		DBG(IO, ul_debug("  log multi-stream timing info"));
+
+		gettime_monotonic(&now);
+		timersub(&now, &log->oldtime, &delta);
+		ssz = fprintf(log->fp, "%c %"PRId64".%06"PRId64" %zd\n",
+			stream->ident,
+			(int64_t)delta.tv_sec, (int64_t)delta.tv_usec, bytes);
+		if (ssz < 0)
+			return -errno;
+
+		log->oldtime = now;
+		break;
+	default:
+		break;
+	}
+
+	if (ctl->flush)
+		fflush(log->fp);
+	return ssz;
+}
+
+static ssize_t log_stream_activity(
+			struct script_control *ctl,
+			struct script_stream *stream,
+			char *buf, size_t bytes)
+{
+	size_t i;
+	ssize_t outsz = 0;
+
+	for (i = 0; i < stream->nlogs; i++) {
+		ssize_t ssz = log_write(ctl, stream, stream->logs[i], buf, bytes);
+
+		if (ssz < 0)
+			return ssz;
+		outsz += ssz;
+	}
+
+	return outsz;
+}
+
+static ssize_t __attribute__ ((__format__ (__printf__, 3, 4)))
+	log_signal(struct script_control *ctl, int signum, const char *msgfmt, ...)
+{
+	struct script_log *log;
+	struct timeval now, delta;
+	char msg[BUFSIZ] = {0};
+	va_list ap;
+	ssize_t sz;
+
+	assert(ctl);
+
+	log = ctl->siglog;
+	if (!log)
+		return 0;
+
+	assert(log->format == SCRIPT_FMT_TIMING_MULTI);
+	DBG(IO, ul_debug("  writing signal to multi-stream timing"));
+
+	gettime_monotonic(&now);
+	timersub(&now, &log->oldtime, &delta);
+
+	if (msgfmt) {
+		int rc;
+		va_start(ap, msgfmt);
+		rc = vsnprintf(msg, sizeof(msg), msgfmt, ap);
+		va_end(ap);
+		if (rc < 0)
+			*msg = '\0';;
+	}
+
+	if (*msg)
+		sz = fprintf(log->fp, "S %"PRId64".%06"PRId64" SIG%s %s\n",
+			(int64_t)delta.tv_sec, (int64_t)delta.tv_usec,
+			signum_to_signame(signum), msg);
+	else
+		sz = fprintf(log->fp, "S %"PRId64".%06"PRId64" SIG%s\n",
+			(int64_t)delta.tv_sec, (int64_t)delta.tv_usec,
+			signum_to_signame(signum));
+
+	log->oldtime = now;
+	return sz;
+}
+
+static ssize_t log_info(struct script_control *ctl, const char *name, const char *msgfmt, ...)
+{
+	struct script_log *log;
+	char msg[BUFSIZ] = {0};
+	va_list ap;
+	ssize_t sz;
+
+	assert(ctl);
+
+	log = ctl->infolog;
+	if (!log)
+		return 0;
+
+	assert(log->format == SCRIPT_FMT_TIMING_MULTI);
+	DBG(IO, ul_debug("  writing info to multi-stream log"));
+
+	if (msgfmt) {
+		int rc;
+		va_start(ap, msgfmt);
+		rc = vsnprintf(msg, sizeof(msg), msgfmt, ap);
+		va_end(ap);
+		if (rc < 0)
+			*msg = '\0';;
+	}
+
+	if (*msg)
+		sz = fprintf(log->fp, "H %f %s %s\n", 0.0, name, msg);
+	else
+		sz = fprintf(log->fp, "H %f %s\n", 0.0, name);
+
+	return sz;
+}
+
+
+static void logging_done(struct script_control *ctl, const char *msg)
+{
+	int status;
+	size_t i;
+
+	DBG(MISC, ul_debug("stop logging"));
+
+	if (WIFSIGNALED(ctl->childstatus))
+		status = WTERMSIG(ctl->childstatus) + 0x80;
+	else
+		status = WEXITSTATUS(ctl->childstatus);
+
+	DBG(MISC, ul_debug(" status=%d", status));
+
+	/* close all output logs */
+	for (i = 0; i < ctl->out.nlogs; i++) {
+		struct script_log *log = ctl->out.logs[i];
+		log_close(ctl, log, msg, status);
+		log_free(ctl, log);
+	}
+	free(ctl->out.logs);
+	ctl->out.logs = NULL;
+	ctl->out.nlogs = 0;
+
+	/* close all input logs */
+	for (i = 0; i < ctl->in.nlogs; i++) {
+		struct script_log *log = ctl->in.logs[i];
+		log_close(ctl, log, msg, status);
+		log_free(ctl, log);
+	}
+	free(ctl->in.logs);
+	ctl->in.logs = NULL;
+	ctl->in.nlogs = 0;
+}
+
+static void callback_child_die(
+			void *data,
+			pid_t child __attribute__((__unused__)),
+			int status)
+{
+	struct script_control *ctl = (struct script_control *) data;
+
+	ctl->child = (pid_t) -1;
+	ctl->childstatus = status;
+}
+
+static void callback_child_sigstop(
+			void *data __attribute__((__unused__)),
+			pid_t child)
+{
+	DBG(SIGNAL, ul_debug(" child stop by SIGSTOP -- stop parent too"));
+	kill(getpid(), SIGSTOP);
+	DBG(SIGNAL, ul_debug(" resume"));
+	kill(child, SIGCONT);
+}
+
+static int callback_log_stream_activity(void *data, int fd, char *buf, size_t bufsz)
+{
+	struct script_control *ctl = (struct script_control *) data;
+	ssize_t ssz = 0;
+
+	DBG(IO, ul_debug("stream activity callback"));
+
+	/* from stdin (user) to command */
+	if (fd == STDIN_FILENO)
+		ssz = log_stream_activity(ctl, &ctl->in, buf, (size_t) bufsz);
+
+	/* from command (master) to stdout and log */
+	else if (fd == ul_pty_get_childfd(ctl->pty))
+		ssz = log_stream_activity(ctl, &ctl->out, buf, (size_t) bufsz);
+
+	if (ssz < 0)
+		return (int) ssz;
+
+	DBG(IO, ul_debug(" append %zd bytes [summary=%" PRIu64 ", max=%" PRIu64 "]", ssz,
+				ctl->outsz, ctl->maxsz));
+
+	ctl->outsz += ssz;
+
+	/* check output limit */
+	if (ctl->maxsz != 0 && ctl->outsz >= ctl->maxsz) {
+		if (!ctl->quiet)
+			printf(_("Script terminated, max output files size %"PRIu64" exceeded.\n"), ctl->maxsz);
+		DBG(IO, ul_debug("output size %"PRIu64", exceeded limit %"PRIu64, ctl->outsz, ctl->maxsz));
+		logging_done(ctl, _("max output size exceeded"));
+		return 1;
+	}
+	return 0;
+}
+
+static int callback_log_signal(void *data, struct signalfd_siginfo *info, void *sigdata)
+{
+	struct script_control *ctl = (struct script_control *) data;
+	ssize_t ssz = 0;
+
+	switch (info->ssi_signo) {
+	case SIGWINCH:
+	{
+		struct winsize *win = (struct winsize *) sigdata;
+		ssz = log_signal(ctl, info->ssi_signo, "ROWS=%d COLS=%d",
+					win->ws_row, win->ws_col);
+		break;
+	}
+	case SIGTERM:
+		/* fallthrough */
+	case SIGINT:
+		/* fallthrough */
+	case SIGQUIT:
+		ssz = log_signal(ctl, info->ssi_signo, NULL);
+		break;
+	default:
+		/* no log */
+		break;
+	}
+
+	return ssz < 0 ? ssz : 0;
+}
+
+static int callback_flush_logs(void *data)
+{
+	struct script_control *ctl = (struct script_control *) data;
+	size_t i;
+
+	for (i = 0; i < ctl->out.nlogs; i++) {
+		int rc = log_flush(ctl, ctl->out.logs[i]);
+		if (rc)
+			return rc;
+	}
+
+	for (i = 0; i < ctl->in.nlogs; i++) {
+		int rc = log_flush(ctl, ctl->in.logs[i]);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
+static void die_if_link(struct script_control *ctl, const char *filename)
+{
+	struct stat s;
+
+	if (ctl->force)
+		return;
+	if (lstat(filename, &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."), filename);
+}
+
+int main(int argc, char **argv)
+{
+	struct script_control ctl = {
+		.out = { .ident = 'O' },
+		.in  = { .ident = 'I' },
+	};
+	struct ul_pty_callbacks *cb;
+	int ch, format = 0, caught_signal = 0, rc = 0, echo = 1;
+	const char *outfile = NULL, *infile = NULL;
+	const char *timingfile = NULL, *shell = NULL;
+
+	enum { FORCE_OPTION = CHAR_MAX + 1 };
+
+	static const struct option longopts[] = {
+		{"append", no_argument, NULL, 'a'},
+		{"command", required_argument, NULL, 'c'},
+		{"echo", required_argument, NULL, 'E'},
+		{"return", no_argument, NULL, 'e'},
+		{"flush", no_argument, NULL, 'f'},
+		{"force", no_argument, NULL, FORCE_OPTION,},
+		{"log-in", required_argument, NULL, 'I'},
+		{"log-out", required_argument, NULL, 'O'},
+		{"log-io", required_argument, NULL, 'B'},
+		{"log-timing", required_argument, NULL, 'T'},
+		{"logging-format", required_argument, NULL, 'm'},
+		{"output-limit", required_argument, NULL, 'o'},
+		{"quiet", no_argument, NULL, 'q'},
+		{"timing", optional_argument, NULL, 't'},
+		{"version", no_argument, NULL, 'V'},
+		{"help", no_argument, NULL, 'h'},
+		{NULL, 0, NULL, 0}
+	};
+	static const ul_excl_t excl[] = {       /* rows and cols in ASCII order */
+		{ 'T', 't' },
+		{ 0 }
+	};
+	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+	setlocale(LC_ALL, "");
+	/*
+	 * 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.
+	 */
+	setlocale(LC_NUMERIC, "C");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	script_init_debug();
+	ON_DBG(PTY, ul_pty_init_debug(0xFFFF));
+
+	ctl.isterm = isatty(STDIN_FILENO);
+
+	while ((ch = getopt_long(argc, argv, "aB:c:eE:fI:O:o:qm:T:t::Vh", longopts, NULL)) != -1) {
+
+		err_exclusive_options(ch, longopts, excl, excl_st);
+
+		switch (ch) {
+		case 'a':
+			ctl.append = 1;
+			break;
+		case 'c':
+			ctl.command = optarg;
+			ctl.command_norm = xstrdup(ctl.command);
+			strrep(ctl.command_norm, '\n', ' ');
+			break;
+		case 'E':
+			if (strcmp(optarg, "auto") == 0)
+				; /* keep default */
+			else if (strcmp(optarg, "never") == 0)
+				echo = 0;
+			else if (strcmp(optarg, "always") == 0)
+				echo = 1;
+			else
+				errx(EXIT_FAILURE, _("unssuported echo mode: '%s'"), optarg);
+			break;
+		case 'e':
+			ctl.rc_wanted = 1;
+			break;
+		case 'f':
+			ctl.flush = 1;
+			break;
+		case FORCE_OPTION:
+			ctl.force = 1;
+			break;
+		case 'B':
+			log_associate(&ctl, &ctl.in, optarg, SCRIPT_FMT_RAW);
+			log_associate(&ctl, &ctl.out, optarg, SCRIPT_FMT_RAW);
+			infile = outfile = optarg;
+			break;
+		case 'I':
+			log_associate(&ctl, &ctl.in, optarg, SCRIPT_FMT_RAW);
+			infile = optarg;
+			break;
+		case 'O':
+			log_associate(&ctl, &ctl.out, optarg, SCRIPT_FMT_RAW);
+			outfile = optarg;
+			break;
+		case 'o':
+			ctl.maxsz = strtosize_or_err(optarg, _("failed to parse output limit size"));
+			break;
+		case 'q':
+			ctl.quiet = 1;
+			break;
+		case 'm':
+			if (strcasecmp(optarg, "classic") == 0)
+				format = SCRIPT_FMT_TIMING_SIMPLE;
+			else if (strcasecmp(optarg, "advanced") == 0)
+				format = SCRIPT_FMT_TIMING_MULTI;
+			else
+				errx(EXIT_FAILURE, _("unsupported logging format: '%s'"), optarg);
+			break;
+		case 't':
+			if (optarg && *optarg == '=')
+				optarg++;
+			timingfile = optarg ? optarg : "/dev/stderr";
+			break;
+		case 'T' :
+			timingfile = optarg;
+			break;
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	/* default if no --log-* specified */
+	if (!outfile && !infile) {
+		if (argc > 0)
+			outfile = argv[0];
+		else {
+			die_if_link(&ctl, DEFAULT_TYPESCRIPT_FILENAME);
+			outfile = DEFAULT_TYPESCRIPT_FILENAME;
+		}
+
+		/* associate stdout with typescript file */
+		log_associate(&ctl, &ctl.out, outfile, SCRIPT_FMT_RAW);
+	}
+
+	if (timingfile) {
+		/* the old SCRIPT_FMT_TIMING_SIMPLE should be used when
+		 * recoding output only (just for backward compatibility),
+		 * otherwise switch to new format. */
+		if (!format)
+			format = infile || (outfile && infile) ?
+					SCRIPT_FMT_TIMING_MULTI :
+					SCRIPT_FMT_TIMING_SIMPLE;
+
+		else if (format == SCRIPT_FMT_TIMING_SIMPLE && outfile && infile)
+			errx(EXIT_FAILURE, _("log multiple streams is mutually "
+					     "exclusive with 'classic' format"));
+		if (outfile)
+			log_associate(&ctl, &ctl.out, timingfile, format);
+		if (infile)
+			log_associate(&ctl, &ctl.in, timingfile, format);
+	}
+
+	shell = getenv("SHELL");
+	if (!shell)
+		shell = _PATH_BSHELL;
+
+	ctl.pty = ul_new_pty(ctl.isterm);
+	if (!ctl.pty)
+		err(EXIT_FAILURE, "failed to allocate PTY handler");
+
+	ul_pty_slave_echo(ctl.pty, echo);
+
+	ul_pty_set_callback_data(ctl.pty, (void *) &ctl);
+	cb = ul_pty_get_callbacks(ctl.pty);
+	cb->child_die = callback_child_die;
+	cb->child_sigstop = callback_child_sigstop;
+	cb->log_stream_activity = callback_log_stream_activity;
+	cb->log_signal = callback_log_signal;
+	cb->flush_logs = callback_flush_logs;
+
+	if (!ctl.quiet) {
+		printf(_("Script started"));
+		if (outfile)
+			printf(_(", output log file is '%s'"), outfile);
+		if (infile)
+			printf(_(", input log file is '%s'"), infile);
+		if (timingfile)
+			printf(_(", timing file is '%s'"), timingfile);
+		printf(_(".\n"));
+	}
+
+#ifdef HAVE_LIBUTEMPTER
+	utempter_add_record(ul_pty_get_childfd(ctl.pty), NULL);
+#endif
+
+	if (ul_pty_setup(ctl.pty))
+		err(EXIT_FAILURE, _("failed to create pseudo-terminal"));
+
+	fflush(stdout);
+
+	/*
+	 * We have terminal, do not use err() from now, use "goto done"
+	 */
+
+	switch ((int) (ctl.child = fork())) {
+	case -1: /* error */
+		warn(_("cannot create child process"));
+		rc = -errno;
+		goto done;
+
+	case 0: /* child */
+	{
+		const char *shname;
+
+		ul_pty_init_slave(ctl.pty);
+
+		signal(SIGTERM, SIG_DFL); /* because /etc/csh.login */
+
+		shname = strrchr(shell, '/');
+		shname = shname ? shname + 1 : shell;
+
+		if (access(shell, X_OK) == 0) {
+			if (ctl.command)
+				execl(shell, shname, "-c", ctl.command, (char *)NULL);
+			else
+				execl(shell, shname, "-i", (char *)NULL);
+		} else {
+			if (ctl.command)
+				execlp(shname, shname, "-c", ctl.command, (char *)NULL);
+			else
+				execlp(shname, shname, "-i", (char *)NULL);
+		}
+
+		err(EXIT_FAILURE, "failed to execute %s", shell);
+		break;
+	}
+	default:
+		break;
+	}
+
+	/* parent */
+	ul_pty_set_child(ctl.pty, ctl.child);
+
+	rc = logging_start(&ctl);
+	if (rc)
+		goto done;
+
+	/* add extra info to advanced timing file */
+	if (timingfile && format == SCRIPT_FMT_TIMING_MULTI) {
+		char buf[FORMAT_TIMESTAMP_MAX];
+		time_t tvec = script_time((time_t *)NULL);
+
+		strtime_iso(&tvec, ISO_TIMESTAMP, buf, sizeof(buf));
+		log_info(&ctl, "START_TIME", "%s", buf);
+
+		if (ctl.isterm) {
+			init_terminal_info(&ctl);
+			log_info(&ctl, "TERM", "%s", ctl.ttytype);
+			log_info(&ctl, "TTY", "%s", ctl.ttyname);
+			log_info(&ctl, "COLUMNS", "%d", ctl.ttycols);
+			log_info(&ctl, "LINES", "%d", ctl.ttylines);
+		}
+		log_info(&ctl, "SHELL", "%s", shell);
+		if (ctl.command)
+			log_info(&ctl, "COMMAND", "%s", ctl.command_norm);
+		log_info(&ctl, "TIMING_LOG", "%s", timingfile);
+		if (outfile)
+			log_info(&ctl, "OUTPUT_LOG", "%s", outfile);
+		if (infile)
+			log_info(&ctl, "INPUT_LOG", "%s", infile);
+	}
+
+        /* this is the main loop */
+	rc = ul_pty_proxy_master(ctl.pty);
+
+	/* all done; cleanup and kill */
+	caught_signal = ul_pty_get_delivered_signal(ctl.pty);
+
+	if (!caught_signal && ctl.child != (pid_t)-1)
+		ul_pty_wait_for_child(ctl.pty);	/* final wait */
+
+	if (caught_signal && ctl.child != (pid_t)-1) {
+		fprintf(stderr, "\nSession terminated, killing shell...");
+		kill(ctl.child, SIGTERM);
+		sleep(2);
+		kill(ctl.child, SIGKILL);
+		fprintf(stderr, " ...killed.\n");
+	}
+
+done:
+	ul_pty_cleanup(ctl.pty);
+	logging_done(&ctl, NULL);
+
+	if (!ctl.quiet)
+		printf(_("Script done.\n"));
+
+#ifdef HAVE_LIBUTEMPTER
+	if (ul_pty_get_childfd(ctl.pty) >= 0)
+		utempter_remove_record(ul_pty_get_childfd(ctl.pty));
+#endif
+	ul_free_pty(ctl.pty);
+
+	/* default exit code */
+	rc = rc ? EXIT_FAILURE : EXIT_SUCCESS;
+
+	/* exit code based on child status */
+	if (ctl.rc_wanted && rc == EXIT_SUCCESS) {
+		if (WIFSIGNALED(ctl.childstatus))
+			rc = WTERMSIG(ctl.childstatus) + 0x80;
+		else
+			rc = WEXITSTATUS(ctl.childstatus);
+	}
+
+	DBG(MISC, ul_debug("done [rc=%d]", rc));
+	return rc;
+}