From c7b8f3ec1a25a31bc08e74910a5632c766da4971 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Tue, 10 Jun 2025 11:45:31 +0200
Subject: [PATCH] =?UTF-8?q?daemon:=20=E2=80=98runProgram=E2=80=99=20exits?=
 =?UTF-8?q?=20with=20127=20upon=20ENOENT=20or=20similar.?=
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This is in accordance with widespread conventions.  Previously it would
exit with code 1, which was misleading.

* nix/libutil/util.cc (runProgram): Exit with 127 if ‘execv’ or ‘execvp’
fails.

Change-Id: I5df214afffda69aa329a25afbc48f6cbfdd0961c
---
 nix/libutil/util.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nix/libutil/util.cc b/nix/libutil/util.cc
index 9a97270af90..77f2547b0a5 100644
--- a/nix/libutil/util.cc
+++ b/nix/libutil/util.cc
@@ -1193,7 +1193,9 @@ string runProgram(Path program, bool searchPath, const Strings & args)
         else
             execv(program.c_str(), stringsToCharPtrs(args_).data());
 
-        throw SysError(format("executing `%1%'") % program);
+	int err = errno;
+        printMsg(lvlError, format("executing `%1%': %2%") % program % strerror(err));
+	_exit(127);
     });
 
     pipe.writeSide.close();