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Groups > gnu.bash.bug > #16616

histexpand in shebang-less script

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The value of `histexpand' is not reset when executing a shebang-less
script. (Admittedly, this is unlikely to matter since the value of
`history' *is* properly reset.)

$ cat > /tmp/test1.sh <<"EOF"
#!/usr/bin/env bash
echo $-
EOF
$ cat > /tmp/test2.sh <<"EOF"
echo $-
EOF
$ chmod +x /tmp/test1.sh /tmp/test2.sh
$ set -H
$ /tmp/test1.sh
hB
$ /tmp/test2.sh
hBH

Since reset_shell_flags is only called in this circumstance, it seems
that turning off history expansion should be the right thing to do in
that function.

---
 flags.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/flags.c b/flags.c
index 7e301f77..187c2e98 100644
--- a/flags.c
+++ b/flags.c
@@ -366,7 +366,3 @@ reset_shell_flags ()
 #if defined (BANG_HISTORY)
-#  if defined (STRICT_POSIX)
-  history_expansion = 0;
-#  else
-  history_expansion = 1;
-#  endif /* STRICT_POSIX */
+  histexp_flag = 0;
 #endif
--

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histexpand in shebang-less script Grisha Levit <grishalevit@gmail.com> - 2020-07-24 19:44 -0400

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