| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | char copyright[] = |
| 36 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 37 | All rights reserved.\n"; |
| 38 | #endif /* not lint */ |
| 39 | |
| 40 | #ifndef lint |
| 41 | static char sccsid[] = "@(#)script.c 5.13 (Berkeley) 3/5/91"; |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | /* |
| 45 | * script |
| 46 | */ |
| 47 | #include <sys/types.h> |
| 48 | #include <sys/stat.h> |
| 49 | #include <termios.h> |
| 50 | #include <sys/ioctl.h> |
| 51 | #include <sys/time.h> |
| 52 | #include <sys/file.h> |
| 53 | #include <sys/signal.h> |
| 54 | #include <stdio.h> |
| 55 | #include <paths.h> |
| 56 | |
| 57 | char *shell; |
| 58 | FILE *fscript; |
| 59 | int master; |
| 60 | int slave; |
| 61 | int child; |
| 62 | int subchild; |
| 63 | char *fname; |
| 64 | |
| 65 | struct termios tt; |
| 66 | struct winsize win; |
| 67 | int lb; |
| 68 | int l; |
| 69 | char line[] = "/dev/ptyXX"; |
| 70 | int aflg; |
| 71 | |
| 72 | main(argc, argv) |
| 73 | int argc; |
| 74 | char *argv[]; |
| 75 | { |
| 76 | extern char *optarg; |
| 77 | extern int optind; |
| 78 | int ch; |
| 79 | void finish(); |
| 80 | char *getenv(); |
| 81 | |
| 82 | while ((ch = getopt(argc, argv, "a")) != EOF) |
| 83 | switch((char)ch) { |
| 84 | case 'a': |
| 85 | aflg++; |
| 86 | break; |
| 87 | case '?': |
| 88 | default: |
| 89 | fprintf(stderr, "usage: script [-a] [file]\n"); |
| 90 | exit(1); |
| 91 | } |
| 92 | argc -= optind; |
| 93 | argv += optind; |
| 94 | |
| 95 | if (argc > 0) |
| 96 | fname = argv[0]; |
| 97 | else |
| 98 | fname = "typescript"; |
| 99 | if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) { |
| 100 | perror(fname); |
| 101 | fail(); |
| 102 | } |
| 103 | |
| 104 | shell = getenv("SHELL"); |
| 105 | if (shell == NULL) |
| 106 | shell = _PATH_BSHELL; |
| 107 | |
| 108 | getmaster(); |
| 109 | printf("Script started, file is %s\n", fname); |
| 110 | fixtty(); |
| 111 | |
| 112 | (void) signal(SIGCHLD, finish); |
| 113 | child = fork(); |
| 114 | if (child < 0) { |
| 115 | perror("fork"); |
| 116 | fail(); |
| 117 | } |
| 118 | if (child == 0) { |
| 119 | subchild = child = fork(); |
| 120 | if (child < 0) { |
| 121 | perror("fork"); |
| 122 | fail(); |
| 123 | } |
| 124 | if (child) |
| 125 | dooutput(); |
| 126 | else |
| 127 | doshell(); |
| 128 | } |
| 129 | doinput(); |
| 130 | } |
| 131 | |
| 132 | doinput() |
| 133 | { |
| 134 | register int cc; |
| 135 | char ibuf[BUFSIZ]; |
| 136 | |
| 137 | (void) fclose(fscript); |
| 138 | while ((cc = read(0, ibuf, BUFSIZ)) > 0) |
| 139 | (void) write(master, ibuf, cc); |
| 140 | done(); |
| 141 | } |
| 142 | |
| 143 | #include <sys/wait.h> |
| 144 | |
| 145 | void |
| 146 | finish() |
| 147 | { |
| 148 | union wait status; |
| 149 | register int pid; |
| 150 | register int die = 0; |
| 151 | |
| 152 | while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0) |
| 153 | if (pid == child) |
| 154 | die = 1; |
| 155 | |
| 156 | if (die) |
| 157 | done(); |
| 158 | } |
| 159 | |
| 160 | dooutput() |
| 161 | { |
| 162 | register int cc; |
| 163 | time_t tvec, time(); |
| 164 | char obuf[BUFSIZ], *ctime(); |
| 165 | |
| 166 | (void) close(0); |
| 167 | tvec = time((time_t *)NULL); |
| 168 | fprintf(fscript, "Script started on %s", ctime(&tvec)); |
| 169 | for (;;) { |
| 170 | cc = read(master, obuf, sizeof (obuf)); |
| 171 | if (cc <= 0) |
| 172 | break; |
| 173 | (void) write(1, obuf, cc); |
| 174 | (void) fwrite(obuf, 1, cc, fscript); |
| 175 | } |
| 176 | done(); |
| 177 | } |
| 178 | |
| 179 | doshell() |
| 180 | { |
| 181 | int t; |
| 182 | |
| 183 | /*** |
| 184 | t = open(_PATH_TTY, O_RDWR); |
| 185 | if (t >= 0) { |
| 186 | (void) ioctl(t, TIOCNOTTY, (char *)0); |
| 187 | (void) close(t); |
| 188 | } |
| 189 | ***/ |
| 190 | getslave(); |
| 191 | (void) close(master); |
| 192 | (void) fclose(fscript); |
| 193 | (void) dup2(slave, 0); |
| 194 | (void) dup2(slave, 1); |
| 195 | (void) dup2(slave, 2); |
| 196 | (void) close(slave); |
| 197 | execl(shell, "sh", "-i", 0); |
| 198 | perror(shell); |
| 199 | fail(); |
| 200 | } |
| 201 | |
| 202 | fixtty() |
| 203 | { |
| 204 | struct termios rtt; |
| 205 | |
| 206 | rtt = tt; |
| 207 | cfmakeraw(&rtt); |
| 208 | rtt.c_lflag &= ~ECHO; |
| 209 | (void) tcsetattr(0, TCSAFLUSH, &rtt); |
| 210 | } |
| 211 | |
| 212 | fail() |
| 213 | { |
| 214 | |
| 215 | (void) kill(0, SIGTERM); |
| 216 | done(); |
| 217 | } |
| 218 | |
| 219 | done() |
| 220 | { |
| 221 | time_t tvec, time(); |
| 222 | char *ctime(); |
| 223 | |
| 224 | if (subchild) { |
| 225 | tvec = time((time_t *)NULL); |
| 226 | fprintf(fscript,"\nScript done on %s", ctime(&tvec)); |
| 227 | (void) fclose(fscript); |
| 228 | (void) close(master); |
| 229 | } else { |
| 230 | (void) tcsetattr(0, TCSAFLUSH, &tt); |
| 231 | printf("Script done, file is %s\n", fname); |
| 232 | } |
| 233 | exit(0); |
| 234 | } |
| 235 | |
| 236 | getmaster() |
| 237 | { |
| 238 | char *pty, *bank, *cp; |
| 239 | struct stat stb; |
| 240 | |
| 241 | pty = &line[strlen("/dev/ptyp")]; |
| 242 | for (bank = "pqrs"; *bank; bank++) { |
| 243 | line[strlen("/dev/pty")] = *bank; |
| 244 | *pty = '0'; |
| 245 | if (stat(line, &stb) < 0) |
| 246 | break; |
| 247 | for (cp = "0123456789abcdef"; *cp; cp++) { |
| 248 | *pty = *cp; |
| 249 | master = open(line, O_RDWR); |
| 250 | if (master >= 0) { |
| 251 | char *tp = &line[strlen("/dev/")]; |
| 252 | int ok; |
| 253 | |
| 254 | /* verify slave side is usable */ |
| 255 | *tp = 't'; |
| 256 | ok = access(line, R_OK|W_OK) == 0; |
| 257 | *tp = 'p'; |
| 258 | if (ok) { |
| 259 | (void) tcgetattr(0, &tt); |
| 260 | (void) ioctl(0, TIOCGWINSZ, |
| 261 | (char *)&win); |
| 262 | return; |
| 263 | } |
| 264 | (void) close(master); |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | fprintf(stderr, "Out of pty's\n"); |
| 269 | fail(); |
| 270 | } |
| 271 | |
| 272 | getslave() |
| 273 | { |
| 274 | |
| 275 | line[strlen("/dev/")] = 't'; |
| 276 | slave = open(line, O_RDWR); |
| 277 | if (slave < 0) { |
| 278 | perror(line); |
| 279 | fail(); |
| 280 | } |
| 281 | (void) tcsetattr(slave, TCSAFLUSH, &tt); |
| 282 | (void) ioctl(slave, TIOCSWINSZ, (char *)&win); |
| 283 | (void) setsid(); |
| 284 | (void) ioctl(slave, TIOCSCTTY, 0); |
| 285 | } |