ENH: Use subprocess, not execv

This means that the `SHELL` variable does not need to be a full path. execvp
would also have solved this

It also means that this works inside git bash on windows. Previously, it was
confused by windows file paths.

1 files changed, 2 insertions, 2 deletions

diff --git a/runtests.py b/runtests.py
index f4abd91d6..4c2439bd9 100755
--- a/runtests.py
+++ b/runtests.py
@@ -183,8 +183,8 @@ def main(argv):
     if args.shell:
         shell = os.environ.get('SHELL', 'sh')
         print("Spawning a Unix shell...")
-        os.execv(shell, [shell] + extra_argv)
-        sys.exit(1)
+        subprocess.call([shell] + extra_argv)
+        sys.exit(0)
 
     if args.coverage:
         dst_dir = os.path.join(ROOT_DIR, 'build', 'coverage')