Annotation of src/usr.bin/script/script.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1980, 1992, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1980, 1992, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
! 45: #endif
! 46: static char rcsid[] = "$NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/types.h>
! 50: #include <sys/wait.h>
! 51: #include <sys/stat.h>
! 52: #include <sys/ioctl.h>
! 53: #include <sys/time.h>
! 54:
! 55: #include <errno.h>
! 56: #include <fcntl.h>
! 57: #include <paths.h>
! 58: #include <signal.h>
! 59: #include <stdio.h>
! 60: #include <stdlib.h>
! 61: #include <string.h>
! 62: #include <termios.h>
! 63: #include <tzfile.h>
! 64: #include <unistd.h>
! 65:
! 66: FILE *fscript;
! 67: int master, slave;
! 68: int child, subchild;
! 69: int outcc;
! 70: char *fname;
! 71:
! 72: struct termios tt;
! 73:
! 74: __dead void done __P((void));
! 75: void dooutput __P((void));
! 76: void doshell __P((void));
! 77: void err __P((const char *, ...));
! 78: void fail __P((void));
! 79: void finish __P((int));
! 80: void scriptflush __P((int));
! 81:
! 82: int
! 83: main(argc, argv)
! 84: int argc;
! 85: char *argv[];
! 86: {
! 87: register int cc;
! 88: struct termios rtt;
! 89: struct winsize win;
! 90: int aflg, ch;
! 91: char ibuf[BUFSIZ];
! 92:
! 93: aflg = 0;
! 94: while ((ch = getopt(argc, argv, "a")) != EOF)
! 95: switch(ch) {
! 96: case 'a':
! 97: aflg = 1;
! 98: break;
! 99: case '?':
! 100: default:
! 101: (void)fprintf(stderr, "usage: script [-a] [file]\n");
! 102: exit(1);
! 103: }
! 104: argc -= optind;
! 105: argv += optind;
! 106:
! 107: if (argc > 0)
! 108: fname = argv[0];
! 109: else
! 110: fname = "typescript";
! 111:
! 112: if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL)
! 113: err("%s: %s", fname, strerror(errno));
! 114:
! 115: (void)tcgetattr(STDIN_FILENO, &tt);
! 116: (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win);
! 117: if (openpty(&master, &slave, NULL, &tt, &win) == -1)
! 118: err("openpty: %s", strerror(errno));
! 119:
! 120: (void)printf("Script started, output file is %s\n", fname);
! 121: rtt = tt;
! 122: cfmakeraw(&rtt);
! 123: rtt.c_lflag &= ~ECHO;
! 124: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
! 125:
! 126: (void)signal(SIGCHLD, finish);
! 127: child = fork();
! 128: if (child < 0) {
! 129: perror("fork");
! 130: fail();
! 131: }
! 132: if (child == 0) {
! 133: subchild = child = fork();
! 134: if (child < 0) {
! 135: perror("fork");
! 136: fail();
! 137: }
! 138: if (child)
! 139: dooutput();
! 140: else
! 141: doshell();
! 142: }
! 143:
! 144: (void)fclose(fscript);
! 145: while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0)
! 146: (void)write(master, ibuf, cc);
! 147: done();
! 148: }
! 149:
! 150: void
! 151: finish(signo)
! 152: int signo;
! 153: {
! 154: register int die, pid;
! 155: union wait status;
! 156:
! 157: die = 0;
! 158: while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0)
! 159: if (pid == child)
! 160: die = 1;
! 161:
! 162: if (die)
! 163: done();
! 164: }
! 165:
! 166: void
! 167: dooutput()
! 168: {
! 169: struct itimerval value;
! 170: register int cc;
! 171: time_t tvec;
! 172: char obuf[BUFSIZ];
! 173:
! 174: (void)close(STDIN_FILENO);
! 175: tvec = time(NULL);
! 176: (void)fprintf(fscript, "Script started on %s", ctime(&tvec));
! 177:
! 178: (void)signal(SIGALRM, scriptflush);
! 179: value.it_interval.tv_sec = SECSPERMIN / 2;
! 180: value.it_interval.tv_usec = 0;
! 181: value.it_value = value.it_interval;
! 182: (void)setitimer(ITIMER_REAL, &value, NULL);
! 183: for (;;) {
! 184: cc = read(master, obuf, sizeof (obuf));
! 185: if (cc <= 0)
! 186: break;
! 187: (void)write(1, obuf, cc);
! 188: (void)fwrite(obuf, 1, cc, fscript);
! 189: outcc += cc;
! 190: }
! 191: done();
! 192: }
! 193:
! 194: void
! 195: scriptflush(signo)
! 196: int signo;
! 197: {
! 198: if (outcc) {
! 199: (void)fflush(fscript);
! 200: outcc = 0;
! 201: }
! 202: }
! 203:
! 204: void
! 205: doshell()
! 206: {
! 207: char *shell;
! 208:
! 209: shell = getenv("SHELL");
! 210: if (shell == NULL)
! 211: shell = _PATH_BSHELL;
! 212:
! 213: (void)close(master);
! 214: (void)fclose(fscript);
! 215: login_tty(slave);
! 216: execl(shell, "sh", "-i", NULL);
! 217: perror(shell);
! 218: fail();
! 219: }
! 220:
! 221: void
! 222: fail()
! 223: {
! 224:
! 225: (void)kill(0, SIGTERM);
! 226: done();
! 227: }
! 228:
! 229: void
! 230: done()
! 231: {
! 232: time_t tvec;
! 233:
! 234: if (subchild) {
! 235: tvec = time(NULL);
! 236: (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec));
! 237: (void)fclose(fscript);
! 238: (void)close(master);
! 239: } else {
! 240: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
! 241: (void)printf("Script done, output file is %s\n", fname);
! 242: }
! 243: exit(0);
! 244: }
! 245:
! 246: #if __STDC__
! 247: #include <stdarg.h>
! 248: #else
! 249: #include <varargs.h>
! 250: #endif
! 251:
! 252: void
! 253: #if __STDC__
! 254: err(const char *fmt, ...)
! 255: #else
! 256: err(fmt, va_alist)
! 257: char *fmt;
! 258: va_dcl
! 259: #endif
! 260: {
! 261: va_list ap;
! 262: #if __STDC__
! 263: va_start(ap, fmt);
! 264: #else
! 265: va_start(ap);
! 266: #endif
! 267: (void)fprintf(stderr, "script: ");
! 268: (void)vfprintf(stderr, fmt, ap);
! 269: va_end(ap);
! 270: (void)fprintf(stderr, "\n");
! 271: exit(1);
! 272: /* NOTREACHED */
! 273: }
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