[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/miscutils/microcom.c b/ap/app/busybox/src/miscutils/microcom.c
new file mode 100644
index 0000000..5e29a1a
--- /dev/null
+++ b/ap/app/busybox/src/miscutils/microcom.c
@@ -0,0 +1,183 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * bare bones 'talk to modem' program - similar to 'cu -l $device'
+ * inspired by mgetty's microcom
+ *
+ * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+//usage:#define microcom_trivial_usage
+//usage: "[-d DELAY] [-t TIMEOUT] [-s SPEED] [-X] TTY"
+//usage:#define microcom_full_usage "\n\n"
+//usage: "Copy bytes for stdin to TTY and from TTY to stdout\n"
+//usage: "\n -d Wait up to DELAY ms for TTY output before sending every"
+//usage: "\n next byte to it"
+//usage: "\n -t Exit if both stdin and TTY are silent for TIMEOUT ms"
+//usage: "\n -s Set serial line to SPEED"
+//usage: "\n -X Disable special meaning of NUL and Ctrl-X from stdin"
+
+#include "libbb.h"
+
+// set raw tty mode
+static void xget1(int fd, struct termios *t, struct termios *oldt)
+{
+ tcgetattr(fd, oldt);
+ *t = *oldt;
+ cfmakeraw(t);
+// t->c_lflag &= ~(ISIG|ICANON|ECHO|IEXTEN);
+// t->c_iflag &= ~(BRKINT|IXON|ICRNL);
+// t->c_oflag &= ~(ONLCR);
+// t->c_cc[VMIN] = 1;
+// t->c_cc[VTIME] = 0;
+}
+
+static int xset1(int fd, struct termios *tio, const char *device)
+{
+ int ret = tcsetattr(fd, TCSAFLUSH, tio);
+
+ if (ret) {
+ bb_perror_msg("can't tcsetattr for %s", device);
+ }
+ return ret;
+}
+
+int microcom_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int microcom_main(int argc UNUSED_PARAM, char **argv)
+{
+ int sfd;
+ int nfd;
+ struct pollfd pfd[2];
+ struct termios tio0, tiosfd, tio;
+ char *device_lock_file;
+ enum {
+ OPT_X = 1 << 0, // do not respect Ctrl-X, Ctrl-@
+ OPT_s = 1 << 1, // baudrate
+ OPT_d = 1 << 2, // wait for device response, ms
+ OPT_t = 1 << 3, // timeout, ms
+ };
+ speed_t speed = 9600;
+ int delay = -1;
+ int timeout = -1;
+ unsigned opts;
+
+ // fetch options
+ opt_complementary = "=1:s+:d+:t+"; // exactly one arg, numeric options
+ opts = getopt32(argv, "Xs:d:t:", &speed, &delay, &timeout);
+// argc -= optind;
+ argv += optind;
+
+ // try to create lock file in /var/lock
+ device_lock_file = (char *)bb_basename(argv[0]);
+ device_lock_file = xasprintf("/var/lock/LCK..%s", device_lock_file);
+ sfd = open(device_lock_file, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0644);
+ if (sfd < 0) {
+ // device already locked -> bail out
+ if (errno == EEXIST)
+ bb_perror_msg_and_die("can't create '%s'", device_lock_file);
+ // can't create lock -> don't care
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(device_lock_file);
+ device_lock_file = NULL;
+ } else {
+ // %4d to make concurrent mgetty (if any) happy.
+ // Mgetty treats 4-bytes lock files as binary,
+ // not text, PID. Making 5+ char file. Brrr...
+ fdprintf(sfd, "%4d\n", getpid());
+ close(sfd);
+ }
+
+ // setup signals
+ bb_signals(0
+ + (1 << SIGHUP)
+ + (1 << SIGINT)
+ + (1 << SIGTERM)
+ + (1 << SIGPIPE)
+ , record_signo);
+
+ // error exit code if we fail to open the device
+ bb_got_signal = 1;
+
+ // open device
+ sfd = open_or_warn(argv[0], O_RDWR | O_NOCTTY | O_NONBLOCK);
+ if (sfd < 0)
+ goto done;
+ fcntl(sfd, F_SETFL, O_RDWR);
+
+ // put device to "raw mode"
+ xget1(sfd, &tio, &tiosfd);
+ // set device speed
+ cfsetspeed(&tio, tty_value_to_baud(speed));
+ if (xset1(sfd, &tio, argv[0]))
+ goto done;
+
+ // put stdin to "raw mode" (if stdin is a TTY),
+ // handle one character at a time
+ if (isatty(STDIN_FILENO)) {
+ xget1(STDIN_FILENO, &tio, &tio0);
+ if (xset1(STDIN_FILENO, &tio, "stdin"))
+ goto done;
+ }
+
+ // main loop: check with poll(), then read/write bytes across
+ pfd[0].fd = sfd;
+ pfd[0].events = POLLIN;
+ pfd[1].fd = STDIN_FILENO;
+ pfd[1].events = POLLIN;
+
+ bb_got_signal = 0;
+ nfd = 2;
+ // Not safe_poll: we want to exit on signal
+ while (!bb_got_signal && poll(pfd, nfd, timeout) > 0) {
+ if (nfd > 1 && pfd[1].revents) {
+ char c;
+ // read from stdin -> write to device
+ if (safe_read(STDIN_FILENO, &c, 1) < 1) {
+ // don't poll stdin anymore if we got EOF/error
+ nfd--;
+ goto skip_write;
+ }
+ // do we need special processing?
+ if (!(opts & OPT_X)) {
+ // ^@ sends Break
+ if (VINTR == c) {
+ tcsendbreak(sfd, 0);
+ goto skip_write;
+ }
+ // ^X exits
+ if (24 == c)
+ break;
+ }
+ write(sfd, &c, 1);
+ if (delay >= 0)
+ safe_poll(pfd, 1, delay);
+skip_write: ;
+ }
+ if (pfd[0].revents) {
+#define iobuf bb_common_bufsiz1
+ ssize_t len;
+ // read from device -> write to stdout
+ len = safe_read(sfd, iobuf, sizeof(iobuf));
+ if (len > 0)
+ full_write(STDOUT_FILENO, iobuf, len);
+ else {
+ // EOF/error -> bail out
+ bb_got_signal = SIGHUP;
+ break;
+ }
+ }
+ }
+
+ // restore device mode
+ tcsetattr(sfd, TCSAFLUSH, &tiosfd);
+
+ if (isatty(STDIN_FILENO))
+ tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio0);
+
+done:
+ if (device_lock_file)
+ unlink(device_lock_file);
+
+ return bb_got_signal;
+}