Annotation of src/usr.bin/script/script.c, Revision 1.21
1.21 ! mickey 1: /* $OpenBSD: script.c,v 1.20 2004/09/14 23:53:07 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: script.c,v 1.3 1994/12/21 08:55:43 jtc Exp $ */
3:
4: /*
1.16 deraadt 5: * Copyright (c) 2001 Theo de Raadt
6: * 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: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29: /*
1.1 deraadt 30: * Copyright (c) 1980, 1992, 1993
31: * The Regents of the University of California. All rights reserved.
32: *
33: * Redistribution and use in source and binary forms, with or without
34: * modification, are permitted provided that the following conditions
35: * are met:
36: * 1. Redistributions of source code must retain the above copyright
37: * notice, this list of conditions and the following disclaimer.
38: * 2. Redistributions in binary form must reproduce the above copyright
39: * notice, this list of conditions and the following disclaimer in the
40: * documentation and/or other materials provided with the distribution.
1.18 millert 41: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 42: * may be used to endorse or promote products derived from this software
43: * without specific prior written permission.
44: *
45: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55: * SUCH DAMAGE.
56: */
57:
58: #ifndef lint
1.21 ! mickey 59: static const char copyright[] =
1.1 deraadt 60: "@(#) Copyright (c) 1980, 1992, 1993\n\
61: The Regents of the University of California. All rights reserved.\n";
62: #endif /* not lint */
63:
64: #ifndef lint
65: #if 0
1.21 ! mickey 66: static const char sccsid[] = "@(#)script.c 8.1 (Berkeley) 6/6/93";
1.1 deraadt 67: #endif
1.21 ! mickey 68: static const char rcsid[] = "$OpenBSD: script.c,v 1.20 2004/09/14 23:53:07 deraadt Exp $";
1.1 deraadt 69: #endif /* not lint */
70:
71: #include <sys/types.h>
72: #include <sys/wait.h>
73: #include <sys/stat.h>
74: #include <sys/ioctl.h>
75: #include <sys/time.h>
76:
77: #include <errno.h>
78: #include <fcntl.h>
79: #include <paths.h>
80: #include <signal.h>
81: #include <stdio.h>
82: #include <stdlib.h>
83: #include <string.h>
84: #include <termios.h>
85: #include <tzfile.h>
86: #include <unistd.h>
87:
1.5 deraadt 88: #include <util.h>
1.7 mickey 89: #include <err.h>
1.5 deraadt 90:
1.1 deraadt 91: FILE *fscript;
92: int master, slave;
1.20 deraadt 93: volatile sig_atomic_t child;
94: pid_t subchild;
1.1 deraadt 95: char *fname;
96:
1.16 deraadt 97: volatile sig_atomic_t dead;
98: volatile sig_atomic_t sigdeadstatus;
99: volatile sig_atomic_t flush;
100:
1.1 deraadt 101: struct termios tt;
102:
1.17 millert 103: __dead void done(int);
104: void dooutput(void);
105: void doshell(void);
106: void fail(void);
107: void finish(int);
108: void scriptflush(int);
109: void handlesigwinch(int);
1.1 deraadt 110:
111: int
1.19 deraadt 112: main(int argc, char *argv[])
1.1 deraadt 113: {
1.21 ! mickey 114: extern char *__progname;
1.16 deraadt 115: struct sigaction sa;
1.1 deraadt 116: struct termios rtt;
117: struct winsize win;
1.16 deraadt 118: char ibuf[BUFSIZ];
119: ssize_t cc, off;
1.1 deraadt 120: int aflg, ch;
121:
122: aflg = 0;
1.3 millert 123: while ((ch = getopt(argc, argv, "a")) != -1)
1.1 deraadt 124: switch(ch) {
125: case 'a':
126: aflg = 1;
127: break;
128: default:
1.21 ! mickey 129: fprintf(stderr, "usage: %s [-a] [file]\n", __progname);
1.1 deraadt 130: exit(1);
131: }
132: argc -= optind;
133: argv += optind;
134:
135: if (argc > 0)
136: fname = argv[0];
137: else
138: fname = "typescript";
139:
140: if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL)
1.13 millert 141: err(1, "%s", fname);
1.1 deraadt 142:
143: (void)tcgetattr(STDIN_FILENO, &tt);
144: (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win);
145: if (openpty(&master, &slave, NULL, &tt, &win) == -1)
1.7 mickey 146: err(1, "openpty");
1.1 deraadt 147:
148: (void)printf("Script started, output file is %s\n", fname);
149: rtt = tt;
150: cfmakeraw(&rtt);
151: rtt.c_lflag &= ~ECHO;
152: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &rtt);
153:
1.16 deraadt 154: bzero(&sa, sizeof sa);
155: sigemptyset(&sa.sa_mask);
156: sa.sa_handler = finish;
157: (void)sigaction(SIGCHLD, &sa, NULL);
158:
159: sa.sa_handler = handlesigwinch;
160: sa.sa_flags = SA_RESTART;
161: (void)sigaction(SIGWINCH, &sa, NULL);
162:
1.1 deraadt 163: child = fork();
164: if (child < 0) {
1.21 ! mickey 165: warn("fork");
1.1 deraadt 166: fail();
167: }
168: if (child == 0) {
169: subchild = child = fork();
170: if (child < 0) {
1.21 ! mickey 171: warn("fork");
1.1 deraadt 172: fail();
173: }
174: if (child)
175: dooutput();
176: else
177: doshell();
178: }
179:
180: (void)fclose(fscript);
1.16 deraadt 181: while (1) {
182: if (dead)
183: break;
184: cc = read(STDIN_FILENO, ibuf, BUFSIZ);
185: if (cc == -1 && errno == EINTR)
186: continue;
187: if (cc <= 0)
188: break;
189: for (off = 0; off < cc; ) {
190: ssize_t n = write(master, ibuf + off, cc - off);
191: if (n == 0)
192: break; /* skip writing */
193: if (n > 0)
194: off += n;
195: }
196: }
197: done(sigdeadstatus);
1.1 deraadt 198: }
199:
1.20 deraadt 200: /* ARGSUSED */
1.1 deraadt 201: void
1.19 deraadt 202: finish(int signo)
1.1 deraadt 203: {
1.8 deraadt 204: int save_errno = errno;
1.16 deraadt 205: int status, e = 1;
206: pid_t pid;
1.1 deraadt 207:
1.16 deraadt 208: while ((pid = wait3(&status, WNOHANG, 0)) > 0) {
1.20 deraadt 209: if (pid == (pid_t)child) {
1.11 ericj 210: if (WIFEXITED(status))
1.16 deraadt 211: e = WEXITSTATUS(status);
1.11 ericj 212: }
1.16 deraadt 213: }
214: dead = 1;
215: sigdeadstatus = e;
1.12 espie 216: errno = save_errno;
217: }
218:
1.20 deraadt 219: /* ARGSUSED */
1.12 espie 220: void
1.19 deraadt 221: handlesigwinch(int signo)
1.12 espie 222: {
1.16 deraadt 223: int save_errno = errno;
1.12 espie 224: struct winsize win;
225: pid_t pgrp;
226:
227: if (ioctl(STDIN_FILENO, TIOCGWINSZ, &win) != -1) {
1.16 deraadt 228: ioctl(slave, TIOCSWINSZ, &win);
229: if (ioctl(slave, TIOCGPGRP, &pgrp) != -1)
230: killpg(pgrp, SIGWINCH);
1.12 espie 231: }
1.8 deraadt 232: errno = save_errno;
1.1 deraadt 233: }
234:
235: void
1.19 deraadt 236: dooutput(void)
1.1 deraadt 237: {
1.16 deraadt 238: struct sigaction sa;
1.1 deraadt 239: struct itimerval value;
1.16 deraadt 240: char obuf[BUFSIZ];
1.1 deraadt 241: time_t tvec;
1.16 deraadt 242: ssize_t outcc = 0, cc, off;
1.1 deraadt 243:
244: (void)close(STDIN_FILENO);
245: tvec = time(NULL);
246: (void)fprintf(fscript, "Script started on %s", ctime(&tvec));
247:
1.16 deraadt 248: bzero(&sa, sizeof sa);
249: sigemptyset(&sa.sa_mask);
250: sa.sa_handler = scriptflush;
251: (void)sigaction(SIGALRM, &sa, NULL);
252:
1.1 deraadt 253: value.it_interval.tv_sec = SECSPERMIN / 2;
254: value.it_interval.tv_usec = 0;
255: value.it_value = value.it_interval;
256: (void)setitimer(ITIMER_REAL, &value, NULL);
257: for (;;) {
1.16 deraadt 258: if (flush) {
259: if (outcc) {
260: (void)fflush(fscript);
261: outcc = 0;
262: }
263: flush = 0;
264: }
1.1 deraadt 265: cc = read(master, obuf, sizeof (obuf));
1.16 deraadt 266: if (cc == -1 && errno == EINTR)
267: continue;
1.1 deraadt 268: if (cc <= 0)
269: break;
1.16 deraadt 270: for (off = 0; off < cc; ) {
271: ssize_t n = write(1, obuf + off, cc - off);
272: if (n == 0)
273: break; /* skip writing */
274: if (n > 0)
275: off += n;
276: }
1.1 deraadt 277: (void)fwrite(obuf, 1, cc, fscript);
278: outcc += cc;
279: }
1.11 ericj 280: done(0);
1.1 deraadt 281: }
282:
1.20 deraadt 283: /* ARGSUSED */
1.1 deraadt 284: void
1.19 deraadt 285: scriptflush(int signo)
1.1 deraadt 286: {
1.16 deraadt 287: flush = 1;
1.1 deraadt 288: }
289:
290: void
1.19 deraadt 291: doshell(void)
1.1 deraadt 292: {
293: char *shell;
294:
295: shell = getenv("SHELL");
296: if (shell == NULL)
297: shell = _PATH_BSHELL;
298:
299: (void)close(master);
300: (void)fclose(fscript);
301: login_tty(slave);
1.15 deraadt 302: execl(shell, shell, "-i", (char *)NULL);
1.21 ! mickey 303: warn("%s", shell);
1.1 deraadt 304: fail();
305: }
306:
307: void
1.19 deraadt 308: fail(void)
1.1 deraadt 309: {
310:
311: (void)kill(0, SIGTERM);
1.11 ericj 312: done(1);
1.1 deraadt 313: }
314:
315: void
1.19 deraadt 316: done(int eval)
1.1 deraadt 317: {
318: time_t tvec;
319:
320: if (subchild) {
321: tvec = time(NULL);
322: (void)fprintf(fscript,"\nScript done on %s", ctime(&tvec));
323: (void)fclose(fscript);
324: (void)close(master);
325: } else {
326: (void)tcsetattr(STDIN_FILENO, TCSAFLUSH, &tt);
327: (void)printf("Script done, output file is %s\n", fname);
328: }
1.11 ericj 329: exit(eval);
1.1 deraadt 330: }
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