On Saturday, 11 November 2023 at 17:29:14 UTC, BoQsc wrote:
https://dlang.org/library/std/process.html
How do I pipe (|) through three programs using std.process?
```
echo This is a sample text | find "sample" | find "text"
```
```d
import std.stdio;
import std.process;
version (Windows) { enum Find = "find"; }
version (Posix) { enum Find = "grep"; }
int main (string [] args)
{
auto p1 = pipe;
auto p2 = pipe;
auto pid1 = spawnProcess (args [1..$], stdin, p1.writeEnd);
auto pid2 = spawnProcess ([Find, "sample"], p1.readEnd,
p2.writeEnd);
auto pid3 = spawnProcess ([Find, "text"], p2.readEnd, stdout);
wait (pid1);
wait (pid2);
wait (pid3);
return 0;
}
```
```
$ ./pip echo This is a sample text
This is a sample text
$ ./pip echo This is an ample text
```
