From b6a08a2fed8a48d3759ea67e958c9f9ec5f44d94 Mon Sep 17 00:00:00 2001
From: eldritch horrors <pennae@lix.systems>
Date: Fri, 5 Apr 2024 22:22:44 +0200
Subject: libutil: return a program handle from runProgram2

this will let us also return a source for the program output later,
which will in turn make sinkToSource unnecessary for program output
processing. this may also reopen a path for provigin program input,
but that still needs a proper async io framework to avoid problems.

Change-Id: Iaf93f47db99c38cfaf134bd60ed6a804d7ddf688
---
 src/libutil/processes.hh | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'src/libutil/processes.hh')

diff --git a/src/libutil/processes.hh b/src/libutil/processes.hh
index 48a195481..90b2d20af 100644
--- a/src/libutil/processes.hh
+++ b/src/libutil/processes.hh
@@ -87,9 +87,26 @@ struct RunOptions
     bool isInteractive = false;
 };
 
+struct [[nodiscard("you must call RunningProgram::wait()")]] RunningProgram
+{
+    friend RunningProgram runProgram2(const RunOptions & options);
+
+private:
+    Path program;
+    Pid pid;
+
+    RunningProgram(Path program, Pid pid) : program(std::move(program)), pid(std::move(pid)) {}
+
+public:
+    RunningProgram() = default;
+    ~RunningProgram();
+
+    void wait();
+};
+
 std::pair<int, std::string> runProgram(RunOptions && options);
 
-void runProgram2(const RunOptions & options);
+RunningProgram runProgram2(const RunOptions & options);
 
 class ExecError : public Error
 {
-- 
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