亚行的shell脚本发送AT命令到调制解调器不能返回控制到外壳并捕获输出 [英] ADB shell script to send AT commands to a modem-cannot return control to a shell and capture output
问题描述
我已经张贴类似的问题，但还是没能得到我的工作做好，所以这个AA第二次尝试，其中， 我想更清楚地说明我的绊脚石。
I already posted similar question, but still could not get my job done, so this a a second attempt, where I would like to more clearly state my stumbling block.
所以基本上我在Android手机的亚行外壳，通过发送AT命令与GPRS调制解调器通信。 我可以通过在命令重定向到设备文件重新presenting调制解调器做到这一点;我可以读回 在后台运行的响应使用cat命令（起步较早）。我在脚本中实现它 它可以发送一个单一的AT命令和读回的响应。例如，下面是脚本 发送AT +警察？以获得操作者的移动露营上的名称：
So basically I am in Android phone's adb shell, communicating with the GPRS modem by sending AT commands. I am able to do it by redirecting at command to the device file representing the modem; and I can read back the response using cat utility running on the background (started earlier). I implemented it in a script which can send a single AT command and read back the response. For example, here is the script to send at+cops? to get the name of the operator the mobile is camping on:
#SendATCommand script
cat /dev/pts/7 &
echo -e at+cops?\\r > /dev/pts/7
输出如下所示：
The output looks as follows:
# ./sendATCommand
./sendATCommand
#
+COPS: 0,0,"AT&T",6
OK
/dev/pts/7: invalid length
现在这里有我解决不了两个问题：
Now here are two problems which I cannot resolve:
- 在我还需要人工preSS ENTER键返回亚行的shell提示符＃。有没有办法返回 以＃提示符编程？同样，我在亚行的shell。
- 在显示的响应不能被捕获，既不是一个变量，也没有在文件中，（如（＃。/ sendATCommand> output.txt的）Output.txt的文件是空的。我试过各种重定向，但仍没有得到它的工作。
- I still need to manually press ENTER button to get back adb shell prompt "#". Is there a way to return to "#" prompt programmatically? Again, I am in adb shell.
- The displayed response cannot be captured, neither in a variable, nor in file, (such as(#./sendATCommand > output.txt) Output.txt file will be empty. I tried various redirections, but still did not get it to work.
任何人都可以请帮我解决这两个问题（如果有的话可能）？最后，我想这个脚本是 从超级脚本调用（如Perl或Powershell的）在PC到手机的Android设备运行 连接，但没有办法做到这一点，直到这两个问题解决了。感谢很多提前！
Can anyone please help me resolve those two problems (if ever possible)? Ultimately I want this little script to be called from a "super" script (e.g. Perl or Powershell) running on PC to which my Android device is connected, but there is no way to do it until those two problems resolved. Thanks a lot in advance!
推荐答案
我有类似的问题，并将输出重定向到文件中。我在echo命令前加 CMD / C 解决我的问题。即如果我理解正确，你需要告诉它需要等到命令执行完毕，然后才将输出重定向到文件系统。我在做这在DOS下。
I had similar problems with redirecting output to file. I resolved my problem by adding CMD /c in front of the echo command. I.e. if I understand correctly you need to tell the system that it needs to wait until command finishes executing and only then redirect output to a file. I was doing it in DOS.
既然你在Android上尝试运行在命令前加 SH -c 。希望它能帮助。
Since you are running on ANDROID try adding sh -c in front of your command. Hope it helps.
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