From: "Bart Schaefer" <schaefer@brasslantern.com>
To: Peter Stephenson <pws@ibmth.df.unipi.it>,
zsh-workers@math.gatech.edu (Zsh hackers list)
Subject: Re: PATCH: 3.1.4: autocd to directory in $PATH
Date: Fri, 9 Oct 1998 10:16:01 -0700 [thread overview]
Message-ID: <981009101601.ZM25272@candle.brasslantern.com> (raw)
In-Reply-To: <9810031530.AA20041@ibmth.df.unipi.it>
On Oct 3, 5:30pm, Peter Stephenson wrote:
} Subject: PATCH: 3.1.4: autocd to directory in $PATH
}
} at the moment it looks to me like nothing other than the full
} stat() horror would be a really worthwhile improvement on
[...]
} ***************
} *** 1489,1494 ****
} --- 1502,1509 ----
} char *cmdarg = (char *) peekfirst(args);
}
} hn = cmdnamtab->getnode(cmdnamtab, cmdarg);
} + if (hn && !isreallycom((Cmdnam)hn))
} + hn = NULL;
} if (!hn && isset(HASHCMDS) && strcmp(cmdarg, "..")) {
} for (s = cmdarg; *s && *s != '/'; s++);
} if (!*s)
hn = (HashNode) hashcmd(cmdarg, pathchecked);
(One more line of context added for clarity.)
I haven't actually walked through this with a debugger, but it looks to
me as though hn = NULL at that point is going to trigger the call to
hashcmd(cmdarg, pathchecked), which in turn is going to call iscom() a
second time; so you end up stat()ing the directory twice. Perhaps
if (hn && !isreallycom((Cmdnam)hn))
hn = NULL;
else if (!hn && isset(HASHCMDS) && strcmp(cmdarg, "..")) {
^^^^
would be better?
Also, what about removing the improperly hashed directory from cmdnamtab
once you've discovered that it isn't a command? That would (I think) get
any real command with the same name put into the table the next time that
name was used, so that you'll never needlessly stat() again.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
next prev parent reply other threads:[~1998-10-09 17:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-10-03 15:30 Peter Stephenson
1998-10-09 17:16 ` Bart Schaefer [this message]
1998-10-12 12:18 ` PATCH: 3.1.4: autocd to directory in $PATH (2) Peter Stephenson
1998-10-14 19:07 ` PATCH: " Bart Schaefer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=981009101601.ZM25272@candle.brasslantern.com \
--to=schaefer@brasslantern.com \
--cc=pws@ibmth.df.unipi.it \
--cc=zsh-workers@math.gatech.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/zsh/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).