diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | Src/builtin.c | 14 |
2 files changed, 20 insertions, 0 deletions
@@ -1,3 +1,9 @@ +2008-07-25 Peter Stephenson <pws@csr.com> + + * 25338: Src/builtin.c: disallow fc editing of the current + history line which has bad effects on stack usage and temporary + files. + 2008-07-23 Clint Adams <clint@zsh.org> * 25330: Doc/Zsh/mod_curses.yo: fix description of diff --git a/Src/builtin.c b/Src/builtin.c index c7ed283a9..9465bb5a0 100644 --- a/Src/builtin.c +++ b/Src/builtin.c @@ -1446,6 +1446,20 @@ bin_fc(char *nam, char **argv, Options ops, int func) unqueue_signals(); zwarnnam("fc", "can't open temp file: %e", errno); } else { + /* + * Nasty behaviour results if we use the current history + * line here. Treat it as if it doesn't exist, unless + * that gives us an empty range. + */ + if (last >= curhist) { + last = curhist - 1; + if (first > last) { + unqueue_signals(); + zwarnnam("fc", "invalid use of current history line"); + unlink(fil); + return 1; + } + } ops->ind['n'] = 1; /* No line numbers here. */ if (!fclist(out, ops, first, last, asgf, pprog)) { char *editor; |