Annotation of src/usr.bin/script/script.c, Revision 1.9
1.9 ! deraadt 1: /* $OpenBSD: script.c,v 1.8 1997/08/04 19:25:56 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1992, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
46: #endif
1.9 ! deraadt 47: static char rcsid[] = "$OpenBSD: script.c,v 1.8 1997/08/04 19:25:56 deraadt Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/types.h>
51: #include <sys/wait.h>
52: #include <sys/stat.h>
53: #include <sys/ioctl.h>
54: #include <sys/time.h>
55:
56: #include <errno.h>
57: #include <fcntl.h>
58: #include <paths.h>
59: #include <signal.h>
60: #include <stdio.h>
61: #include <stdlib.h>
62: #include <string.h>
63: #include <termios.h>
64: #include <tzfile.h>
65: #include <unistd.h>
66:
1.5 deraadt 67: #include <util.h>
1.7 mickey 68: #include <err.h>
1.5 deraadt 69:
1.1 deraadt 70: FILE *fscript;
71: int master, slave;
72: int child, subchild;
73: int outcc;
74: char *fname;
75:
76: struct termios tt;
77:
78: __dead void done __P((void));
79: void dooutput __P((void));
80: void doshell __P((void));
81: void fail __P((void));
82: void finish __P((int));
83: void scriptflush __P((int));
84:
85: int
86: main(argc, argv)
87: int argc;
88: char *argv[];
89: {
90: register int cc;
91: struct termios rtt;
92: struct winsize win;
93: int aflg, ch;
94: char ibuf[BUFSIZ];
95:
96: aflg = 0;
1.3 millert 97: while ((ch = getopt(argc, argv, "a")) != -1)
1.1 deraadt 98: switch(ch) {
99: case 'a':
100: aflg = 1;
101: break;
102: case '?':
103: default:
104: (void)fprintf(stderr, "usage: script [-a] [file]\n");
105: exit(1);
106: }
107: argc -= optind;
108: argv += optind;
109:
110: if (argc > 0)
111: fname = argv[0];
112: else
113: fname = "typescript";
114:
115: if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL)
1.7 mickey 116: err(1, fname);
1.1 deraadt 117:
118: (void)tcgetattr(STDIN_FILENO, &tt);
119: (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win);
120: if (openpty(&master, &slave, NULL, &tt, &win) == -1)
1.7 mickey 121: err(1, "openpty");
1.1 deraadt 122:
123: (void)printf("Script started, output file is %s\n", fname);
124: rtt = tt;
125: cfmakeraw(&rtt);
126: rtt.c_lflag &= ~ECHO;
127: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
128:
129: (void)signal(SIGCHLD, finish);
130: child = fork();
131: if (child < 0) {
132: perror("fork");
133: fail();
134: }
135: if (child == 0) {
136: subchild = child = fork();
137: if (child < 0) {
138: perror("fork");
139: fail();
140: }
141: if (child)
142: dooutput();
143: else
144: doshell();
145: }
146:
147: (void)fclose(fscript);
148: while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0)
149: (void)write(master, ibuf, cc);
150: done();
1.5 deraadt 151: exit(0);
1.1 deraadt 152: }
153:
154: void
155: finish(signo)
156: int signo;
157: {
158: register int die, pid;
1.8 deraadt 159: int save_errno = errno;
1.1 deraadt 160: union wait status;
161:
162: die = 0;
163: while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0)
164: if (pid == child)
165: die = 1;
166:
167: if (die)
168: done();
1.8 deraadt 169: errno = save_errno;
1.1 deraadt 170: }
171:
172: void
173: dooutput()
174: {
175: struct itimerval value;
176: register int cc;
177: time_t tvec;
178: char obuf[BUFSIZ];
179:
180: (void)close(STDIN_FILENO);
181: tvec = time(NULL);
182: (void)fprintf(fscript, "Script started on %s", ctime(&tvec));
183:
184: (void)signal(SIGALRM, scriptflush);
185: value.it_interval.tv_sec = SECSPERMIN / 2;
186: value.it_interval.tv_usec = 0;
187: value.it_value = value.it_interval;
188: (void)setitimer(ITIMER_REAL, &value, NULL);
189: for (;;) {
190: cc = read(master, obuf, sizeof (obuf));
191: if (cc <= 0)
192: break;
193: (void)write(1, obuf, cc);
194: (void)fwrite(obuf, 1, cc, fscript);
195: outcc += cc;
196: }
197: done();
198: }
199:
200: void
201: scriptflush(signo)
202: int signo;
203: {
1.9 ! deraadt 204: int save_errno = errno;
! 205:
1.1 deraadt 206: if (outcc) {
207: (void)fflush(fscript);
208: outcc = 0;
209: }
1.9 ! deraadt 210: errno = save_errno;
1.1 deraadt 211: }
212:
213: void
214: doshell()
215: {
216: char *shell;
217:
218: shell = getenv("SHELL");
219: if (shell == NULL)
220: shell = _PATH_BSHELL;
221:
222: (void)close(master);
223: (void)fclose(fscript);
224: login_tty(slave);
1.4 deraadt 225: execl(shell, shell, "-i", NULL);
1.1 deraadt 226: perror(shell);
227: fail();
228: }
229:
230: void
231: fail()
232: {
233:
234: (void)kill(0, SIGTERM);
235: done();
236: }
237:
238: void
239: done()
240: {
241: time_t tvec;
242:
243: if (subchild) {
244: tvec = time(NULL);
245: (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec));
246: (void)fclose(fscript);
247: (void)close(master);
248: } else {
249: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
250: (void)printf("Script done, output file is %s\n", fname);
251: }
252: exit(0);
253: }
254:
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