Merge pull request #9494 from sellout/nix-run-execv

Don’t use `execvp` when we know the path

(cherry picked from commit dfa219d03b2277e61dde1c1ddddddff7411ef112)
Change-Id: I2226340cebbe935e1f2fe10207daba69683c8cb3

4 files changed, 15 insertions, 5 deletions

diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index c01ef1a2a..8b92d4ccc 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -589,7 +589,7 @@ struct CmdDevelop : Common, MixEnvironment
             }
         }
 
-        runProgramInStore(store, shell, args, buildEnvironment.getSystem());
+        runProgramInStore(store, UseSearchPath::Use, shell, args, buildEnvironment.getSystem());
     }
 };
 
diff --git a/src/nix/fmt.cc b/src/nix/fmt.cc
index c85eacded..059904150 100644
--- a/src/nix/fmt.cc
+++ b/src/nix/fmt.cc
@@ -49,7 +49,7 @@ struct CmdFmt : SourceExprCommand {
             }
         }
 
-        runProgramInStore(store, app.program, programArgs);
+        runProgramInStore(store, UseSearchPath::DontUse, app.program, programArgs);
     };
 };
 
diff --git a/src/nix/run.cc b/src/nix/run.cc
index 1baf299ab..1c16ce2c9 100644
--- a/src/nix/run.cc
+++ b/src/nix/run.cc
@@ -24,6 +24,7 @@ std::string chrootHelperName = "__run_in_chroot";
 namespace nix {
 
 void runProgramInStore(ref<Store> store,
+    UseSearchPath useSearchPath,
     const std::string & program,
     const Strings & args,
     std::optional<std::string_view> system)
@@ -57,7 +58,10 @@ void runProgramInStore(ref<Store> store,
     if (system)
         setPersonality(*system);
 
-    execvp(program.c_str(), stringsToCharPtrs(args).data());
+    if (useSearchPath == UseSearchPath::Use)
+        execvp(program.c_str(), stringsToCharPtrs(args).data());
+    else
+        execv(program.c_str(), stringsToCharPtrs(args).data());
 
     throw SysError("unable to execute '%s'", program);
 }
@@ -131,7 +135,7 @@ struct CmdShell : InstallablesCommand, MixEnvironment
         Strings args;
         for (auto & arg : command) args.push_back(arg);
 
-        runProgramInStore(store, *command.begin(), args);
+        runProgramInStore(store, UseSearchPath::Use, *command.begin(), args);
     }
 };
 
@@ -193,7 +197,7 @@ struct CmdRun : InstallableValueCommand
         Strings allArgs{app.program};
         for (auto & i : args) allArgs.push_back(i);
 
-        runProgramInStore(store, app.program, allArgs);
+        runProgramInStore(store, UseSearchPath::DontUse, app.program, allArgs);
     }
 };
 
diff --git a/src/nix/run.hh b/src/nix/run.hh
index 97ddef19b..a55917b06 100644
--- a/src/nix/run.hh
+++ b/src/nix/run.hh
@@ -5,7 +5,13 @@
 
 namespace nix {
 
+enum struct UseSearchPath {
+    Use,
+    DontUse
+};
+
 void runProgramInStore(ref<Store> store,
+    UseSearchPath useSearchPath,
     const std::string & program,
     const Strings & args,
     std::optional<std::string_view> system = std::nullopt);