[英]How to prefill command line input
I'm running a bash script and I'd like to prefill a command line with some command after executing the script. 我正在运行一个bash脚本,我想在执行脚本后用命令行预填充命令行。 The only condition is that the script mustn't be running at that time. 唯一的条件是该脚本当时不能运行。
What I need is to ... 我需要的是......
Is it even possible? 它甚至可能吗? All what I tried is to simulate a bash script using 我尝试的所有内容都是使用模拟bash脚本
read -e -i "$comm" -p "[$USER@$HOSTNAME $PWD]$ " input
command $input
But I'm looking for something more straightforward. 但我正在寻找更直接的东西。
You need to use the TIOCSTI ioctl. 您需要使用TIOCSTI ioctl。 Here's an example C program that shows how it works: 这是一个示例C程序,它显示了它的工作原理:
#include <sys/ioctl.h>
main()
{
char buf[] = "date";
int i;
for (i = 0; i < sizeof buf - 1; i++)
ioctl(0, TIOCSTI, &buf[i]);
return 0;
}
Compile this and run it and "date" will be buffered as input on stdin, which your shell will read after the program exits. 编译并运行它,“date”将作为stdin的输入缓冲,shell将在程序退出后读取。 You can roll this up into a command that lets you stuff anything into the input stream and use that command in your bash script. 您可以将其汇总到一个命令中,该命令允许您将任何内容填充到输入流中,并在bash脚本中使用该命令。
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