Annotation of src/usr.bin/script/script.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc 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
1.2 ! deraadt 47: static char rcsid[] = "$OpenBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc 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:
67: FILE *fscript;
68: int master, slave;
69: int child, subchild;
70: int outcc;
71: char *fname;
72:
73: struct termios tt;
74:
75: __dead void done __P((void));
76: void dooutput __P((void));
77: void doshell __P((void));
78: void err __P((const char *, ...));
79: void fail __P((void));
80: void finish __P((int));
81: void scriptflush __P((int));
82:
83: int
84: main(argc, argv)
85: int argc;
86: char *argv[];
87: {
88: register int cc;
89: struct termios rtt;
90: struct winsize win;
91: int aflg, ch;
92: char ibuf[BUFSIZ];
93:
94: aflg = 0;
95: while ((ch = getopt(argc, argv, "a")) != EOF)
96: switch(ch) {
97: case 'a':
98: aflg = 1;
99: break;
100: case '?':
101: default:
102: (void)fprintf(stderr, "usage: script [-a] [file]\n");
103: exit(1);
104: }
105: argc -= optind;
106: argv += optind;
107:
108: if (argc > 0)
109: fname = argv[0];
110: else
111: fname = "typescript";
112:
113: if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL)
114: err("%s: %s", fname, strerror(errno));
115:
116: (void)tcgetattr(STDIN_FILENO, &tt);
117: (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win);
118: if (openpty(&master, &slave, NULL, &tt, &win) == -1)
119: err("openpty: %s", strerror(errno));
120:
121: (void)printf("Script started, output file is %s\n", fname);
122: rtt = tt;
123: cfmakeraw(&rtt);
124: rtt.c_lflag &= ~ECHO;
125: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
126:
127: (void)signal(SIGCHLD, finish);
128: child = fork();
129: if (child < 0) {
130: perror("fork");
131: fail();
132: }
133: if (child == 0) {
134: subchild = child = fork();
135: if (child < 0) {
136: perror("fork");
137: fail();
138: }
139: if (child)
140: dooutput();
141: else
142: doshell();
143: }
144:
145: (void)fclose(fscript);
146: while ((cc = read(STDIN_FILENO, ibuf, BUFSIZ)) > 0)
147: (void)write(master, ibuf, cc);
148: done();
149: }
150:
151: void
152: finish(signo)
153: int signo;
154: {
155: register int die, pid;
156: union wait status;
157:
158: die = 0;
159: while ((pid = wait3((int *)&status, WNOHANG, 0)) > 0)
160: if (pid == child)
161: die = 1;
162:
163: if (die)
164: done();
165: }
166:
167: void
168: dooutput()
169: {
170: struct itimerval value;
171: register int cc;
172: time_t tvec;
173: char obuf[BUFSIZ];
174:
175: (void)close(STDIN_FILENO);
176: tvec = time(NULL);
177: (void)fprintf(fscript, "Script started on %s", ctime(&tvec));
178:
179: (void)signal(SIGALRM, scriptflush);
180: value.it_interval.tv_sec = SECSPERMIN / 2;
181: value.it_interval.tv_usec = 0;
182: value.it_value = value.it_interval;
183: (void)setitimer(ITIMER_REAL, &value, NULL);
184: for (;;) {
185: cc = read(master, obuf, sizeof (obuf));
186: if (cc <= 0)
187: break;
188: (void)write(1, obuf, cc);
189: (void)fwrite(obuf, 1, cc, fscript);
190: outcc += cc;
191: }
192: done();
193: }
194:
195: void
196: scriptflush(signo)
197: int signo;
198: {
199: if (outcc) {
200: (void)fflush(fscript);
201: outcc = 0;
202: }
203: }
204:
205: void
206: doshell()
207: {
208: char *shell;
209:
210: shell = getenv("SHELL");
211: if (shell == NULL)
212: shell = _PATH_BSHELL;
213:
214: (void)close(master);
215: (void)fclose(fscript);
216: login_tty(slave);
217: execl(shell, "sh", "-i", NULL);
218: perror(shell);
219: fail();
220: }
221:
222: void
223: fail()
224: {
225:
226: (void)kill(0, SIGTERM);
227: done();
228: }
229:
230: void
231: done()
232: {
233: time_t tvec;
234:
235: if (subchild) {
236: tvec = time(NULL);
237: (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec));
238: (void)fclose(fscript);
239: (void)close(master);
240: } else {
241: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
242: (void)printf("Script done, output file is %s\n", fname);
243: }
244: exit(0);
245: }
246:
247: #if __STDC__
248: #include <stdarg.h>
249: #else
250: #include <varargs.h>
251: #endif
252:
253: void
254: #if __STDC__
255: err(const char *fmt, ...)
256: #else
257: err(fmt, va_alist)
258: char *fmt;
259: va_dcl
260: #endif
261: {
262: va_list ap;
263: #if __STDC__
264: va_start(ap, fmt);
265: #else
266: va_start(ap);
267: #endif
268: (void)fprintf(stderr, "script: ");
269: (void)vfprintf(stderr, fmt, ap);
270: va_end(ap);
271: (void)fprintf(stderr, "\n");
272: exit(1);
273: /* NOTREACHED */
274: }
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