[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/util-linux/script.c b/ap/app/busybox/src/util-linux/script.c
new file mode 100644
index 0000000..8fb991d
--- /dev/null
+++ b/ap/app/busybox/src/util-linux/script.c
@@ -0,0 +1,204 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * script implementation for busybox
+ *
+ * pascal.bellard@ads-lu.com
+ *
+ * Based on code from util-linux v 2.12r
+ * Copyright (c) 1980
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+//usage:#define script_trivial_usage
+//usage: "[-afq" IF_SCRIPTREPLAY("t") "] [-c PROG] [OUTFILE]"
+//usage:#define script_full_usage "\n\n"
+//usage: " -a Append output"
+//usage: "\n -c PROG Run PROG, not shell"
+//usage: "\n -f Flush output after each write"
+//usage: "\n -q Quiet"
+//usage: IF_SCRIPTREPLAY(
+//usage: "\n -t Send timing to stderr"
+//usage: )
+
+#include "libbb.h"
+
+int script_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int script_main(int argc UNUSED_PARAM, char **argv)
+{
+ int opt;
+ int mode;
+ int child_pid;
+ int attr_ok; /* NB: 0: ok */
+ int winsz_ok;
+ int pty;
+ char pty_line[GETPTY_BUFSIZE];
+ struct termios tt, rtt;
+ struct winsize win;
+ const char *fname = "typescript";
+ const char *shell;
+ char shell_opt[] = "-i";
+ char *shell_arg = NULL;
+ enum {
+ OPT_a = (1 << 0),
+ OPT_c = (1 << 1),
+ OPT_f = (1 << 2),
+ OPT_q = (1 << 3),
+ OPT_t = (1 << 4),
+ };
+
+#if ENABLE_LONG_OPTS
+ static const char getopt_longopts[] ALIGN1 =
+ "append\0" No_argument "a"
+ "command\0" Required_argument "c"
+ "flush\0" No_argument "f"
+ "quiet\0" No_argument "q"
+ IF_SCRIPTREPLAY("timing\0" No_argument "t")
+ ;
+
+ applet_long_options = getopt_longopts;
+#endif
+
+ opt_complementary = "?1"; /* max one arg */
+ opt = getopt32(argv, "ac:fq" IF_SCRIPTREPLAY("t") , &shell_arg);
+ //argc -= optind;
+ argv += optind;
+ if (argv[0]) {
+ fname = argv[0];
+ }
+ mode = O_CREAT|O_TRUNC|O_WRONLY;
+ if (opt & OPT_a) {
+ mode = O_CREAT|O_APPEND|O_WRONLY;
+ }
+ if (opt & OPT_c) {
+ shell_opt[1] = 'c';
+ }
+ if (!(opt & OPT_q)) {
+ printf("Script started, file is %s\n", fname);
+ }
+ shell = get_shell_name();
+
+ pty = xgetpty(pty_line);
+
+ /* get current stdin's tty params */
+ attr_ok = tcgetattr(0, &tt);
+ winsz_ok = ioctl(0, TIOCGWINSZ, (char *)&win);
+
+ rtt = tt;
+ cfmakeraw(&rtt);
+ rtt.c_lflag &= ~ECHO;
+ tcsetattr(0, TCSAFLUSH, &rtt);
+
+ /* "script" from util-linux exits when child exits,
+ * we wouldn't wait for EOF from slave pty
+ * (output may be produced by grandchildren of child) */
+ signal(SIGCHLD, record_signo);
+
+ /* TODO: SIGWINCH? pass window size changes down to slave? */
+
+ child_pid = xvfork();
+
+ if (child_pid) {
+ /* parent */
+#define buf bb_common_bufsiz1
+ struct pollfd pfd[2];
+ int outfd, count, loop;
+ double oldtime = ENABLE_SCRIPTREPLAY ? time(NULL) : 0;
+ smallint fd_count = 2;
+
+ outfd = xopen(fname, mode);
+ pfd[0].fd = pty;
+ pfd[0].events = POLLIN;
+ pfd[1].fd = STDIN_FILENO;
+ pfd[1].events = POLLIN;
+ ndelay_on(pty); /* this descriptor is not shared, can do this */
+ /* ndelay_on(STDIN_FILENO); - NO, stdin can be shared! Pity :( */
+
+ /* copy stdin to pty master input,
+ * copy pty master output to stdout and file */
+ /* TODO: don't use full_write's, use proper write buffering */
+ while (fd_count && !bb_got_signal) {
+ /* not safe_poll! we want SIGCHLD to EINTR poll */
+ if (poll(pfd, fd_count, -1) < 0 && errno != EINTR) {
+ /* If child exits too quickly, we may get EIO:
+ * for example, try "script -c true" */
+ break;
+ }
+ if (pfd[0].revents) {
+ errno = 0;
+ count = safe_read(pty, buf, sizeof(buf));
+ if (count <= 0 && errno != EAGAIN) {
+ /* err/eof from pty: exit */
+ goto restore;
+ }
+ if (count > 0) {
+ if (ENABLE_SCRIPTREPLAY && (opt & OPT_t)) {
+ struct timeval tv;
+ double newtime;
+
+ gettimeofday(&tv, NULL);
+ newtime = tv.tv_sec + (double) tv.tv_usec / 1000000;
+ fprintf(stderr, "%f %u\n", newtime - oldtime, count);
+ oldtime = newtime;
+ }
+ full_write(STDOUT_FILENO, buf, count);
+ full_write(outfd, buf, count);
+ if (opt & OPT_f) {
+ fsync(outfd);
+ }
+ }
+ }
+ if (pfd[1].revents) {
+ count = safe_read(STDIN_FILENO, buf, sizeof(buf));
+ if (count <= 0) {
+ /* err/eof from stdin: don't read stdin anymore */
+ pfd[1].revents = 0;
+ fd_count--;
+ } else {
+ full_write(pty, buf, count);
+ }
+ }
+ }
+ /* If loop was exited because SIGCHLD handler set bb_got_signal,
+ * there still can be some buffered output. But dont loop forever:
+ * we won't pump orphaned grandchildren's output indefinitely.
+ * Testcase: running this in script:
+ * exec dd if=/dev/zero bs=1M count=1
+ * must have "1+0 records in, 1+0 records out" captured too.
+ * (util-linux's script doesn't do this. buggy :) */
+ loop = 999;
+ /* pty is in O_NONBLOCK mode, we exit as soon as buffer is empty */
+ while (--loop && (count = safe_read(pty, buf, sizeof(buf))) > 0) {
+ full_write(STDOUT_FILENO, buf, count);
+ full_write(outfd, buf, count);
+ }
+ restore:
+ if (attr_ok == 0)
+ tcsetattr(0, TCSAFLUSH, &tt);
+ if (!(opt & OPT_q))
+ printf("Script done, file is %s\n", fname);
+ return EXIT_SUCCESS;
+ }
+
+ /* child: make pty slave to be input, output, error; run shell */
+ close(pty); /* close pty master */
+ /* open pty slave to fd 0,1,2 */
+ close(0);
+ xopen(pty_line, O_RDWR); /* uses fd 0 */
+ xdup2(0, 1);
+ xdup2(0, 2);
+ /* copy our original stdin tty's parameters to pty */
+ if (attr_ok == 0)
+ tcsetattr(0, TCSAFLUSH, &tt);
+ if (winsz_ok == 0)
+ ioctl(0, TIOCSWINSZ, (char *)&win);
+ /* set pty as a controlling tty */
+ setsid();
+ ioctl(0, TIOCSCTTY, 0 /* 0: don't forcibly steal */);
+
+ /* Non-ignored signals revert to SIG_DFL on exec anyway */
+ /*signal(SIGCHLD, SIG_DFL);*/
+ execl(shell, shell, shell_opt, shell_arg, (char *) NULL);
+ bb_simple_perror_msg_and_die(shell);
+}