diff options
Diffstat (limited to 'usr.bin/script/script.c')
| -rw-r--r-- | usr.bin/script/script.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/usr.bin/script/script.c b/usr.bin/script/script.c new file mode 100644 index 0000000..64ca486 --- /dev/null +++ b/usr.bin/script/script.c @@ -0,0 +1,278 @@ +/* + * Copyright (c) 1980, 1992, 1993 + * The 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. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD$"); + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1992, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#ifndef lint +static const char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93"; +#endif + +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/stat.h> +#include <sys/ioctl.h> +#include <sys/time.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <libutil.h> +#include <paths.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <termios.h> +#include <unistd.h> + +static FILE *fscript; +static int master, slave; +static int child; +static const char *fname; +static int qflg, ttyflg; + +static struct termios tt; + +static void done(int) __dead2; +static void doshell(char **); +static void fail(void); +static void finish(void); +static void usage(void); + +int +main(int argc, char *argv[]) +{ + int cc; + struct termios rtt, stt; + struct winsize win; + int aflg, kflg, ch, n; + struct timeval tv, *tvp; + time_t tvec, start; + char obuf[BUFSIZ]; + char ibuf[BUFSIZ]; + fd_set rfd; + int flushtime = 30; + + aflg = kflg = 0; + while ((ch = getopt(argc, argv, "aqkt:")) != -1) + switch(ch) { + case 'a': + aflg = 1; + break; + case 'q': + qflg = 1; + break; + case 'k': + kflg = 1; + break; + case 't': + flushtime = atoi(optarg); + if (flushtime < 0) + err(1, "invalid flush time %d", flushtime); + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc > 0) { + fname = argv[0]; + argv++; + argc--; + } else + fname = "typescript"; + + if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) + err(1, "%s", fname); + + if ((ttyflg = isatty(STDIN_FILENO)) != 0) { + if (tcgetattr(STDIN_FILENO, &tt) == -1) + err(1, "tcgetattr"); + if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) == -1) + err(1, "ioctl"); + if (openpty(&master, &slave, NULL, &tt, &win) == -1) + err(1, "openpty"); + } else { + if (openpty(&master, &slave, NULL, NULL, NULL) == -1) + err(1, "openpty"); + } + + if (!qflg) { + tvec = time(NULL); + (void)printf("Script started, output file is %s\n", fname); + (void)fprintf(fscript, "Script started on %s", ctime(&tvec)); + fflush(fscript); + } + if (ttyflg) { + rtt = tt; + cfmakeraw(&rtt); + rtt.c_lflag &= ~ECHO; + (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt); + } + + child = fork(); + if (child < 0) { + warn("fork"); + done(1); + } + if (child == 0) + doshell(argv); + close(slave); + + if (flushtime > 0) + tvp = &tv; + else + tvp = NULL; + + start = time(0); + FD_ZERO(&rfd); + for (;;) { + FD_SET(master, &rfd); + FD_SET(STDIN_FILENO, &rfd); + if (flushtime > 0) { + tv.tv_sec = flushtime; + tv.tv_usec = 0; + } + n = select(master + 1, &rfd, 0, 0, tvp); + if (n < 0 && errno != EINTR) + break; + if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) { + cc = read(STDIN_FILENO, ibuf, BUFSIZ); + if (cc < 0) + break; + if (cc == 0) + (void)write(master, ibuf, 0); + if (cc > 0) { + (void)write(master, ibuf, cc); + if (kflg && tcgetattr(master, &stt) >= 0 && + ((stt.c_lflag & ECHO) == 0)) { + (void)fwrite(ibuf, 1, cc, fscript); + } + } + } + if (n > 0 && FD_ISSET(master, &rfd)) { + cc = read(master, obuf, sizeof (obuf)); + if (cc <= 0) + break; + (void)write(STDOUT_FILENO, obuf, cc); + (void)fwrite(obuf, 1, cc, fscript); + } + tvec = time(0); + if (tvec - start >= flushtime) { + fflush(fscript); + start = tvec; + } + } + finish(); + done(0); +} + +static void +usage(void) +{ + (void)fprintf(stderr, + "usage: script [-akq] [-t time] [file [command ...]]\n"); + exit(1); +} + +static void +finish(void) +{ + int e, status; + + if (waitpid(child, &status, 0) == child) { + if (WIFEXITED(status)) + e = WEXITSTATUS(status); + else if (WIFSIGNALED(status)) + e = WTERMSIG(status); + else /* can't happen */ + e = 1; + done(e); + } +} + +static void +doshell(char **av) +{ + const char *shell; + + shell = getenv("SHELL"); + if (shell == NULL) + shell = _PATH_BSHELL; + + (void)close(master); + (void)fclose(fscript); + login_tty(slave); + if (av[0]) { + execvp(av[0], av); + warn("%s", av[0]); + } else { + execl(shell, shell, "-i", (char *)NULL); + warn("%s", shell); + } + fail(); +} + +static void +fail(void) +{ + (void)kill(0, SIGTERM); + done(1); +} + +static void +done(int eno) +{ + time_t tvec; + + if (ttyflg) + (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt); + tvec = time(NULL); + if (!qflg) { + (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec)); + (void)printf("\nScript done, output file is %s\n", fname); + } + (void)fclose(fscript); + (void)close(master); + exit(eno); +} |
