Add basic implementation of execveat syscall and associated tests.

Allow file descriptors of directories as well as AT_FDCWD.

PiperOrigin-RevId: 275929668

1 files changed, 7 insertions, 0 deletions

diff --git a/test/util/multiprocess_util.h b/test/util/multiprocess_util.h
index 0aecd3439..c413d63ea 100644
--- a/test/util/multiprocess_util.h
+++ b/test/util/multiprocess_util.h
@@ -102,6 +102,13 @@ inline PosixErrorOr<Cleanup> ForkAndExec(const std::string& filename,
   return ForkAndExec(filename, argv, envv, [] {}, child, execve_errno);
 }
 
+// Equivalent to ForkAndExec, except using dirfd and flags with execveat.
+PosixErrorOr<Cleanup> ForkAndExecveat(int32_t dirfd, const std::string& pathname,
+                                      const ExecveArray& argv,
+                                      const ExecveArray& envv, int flags,
+                                      const std::function<void()>& fn,
+                                      pid_t* child, int* execve_errno);
+
 // Calls fn in a forked subprocess and returns the exit status of the
 // subprocess.
 //