From: Kamil Dudka <kdudka@redhat.com>
To: Peter Stephenson <p.w.stephenson@ntlworld.com>
Cc: zsh-workers@zsh.org
Subject: Re: shwordsplit: final non-whitespace IFS character problem
Date: Tue, 08 Aug 2017 12:56:40 +0200 [thread overview]
Message-ID: <5431781.suoAVAckmf@kdudka-nb> (raw)
In-Reply-To: <20170806210110.2328c3a2@ntlworld.com>
On Sunday, August 06, 2017 21:01:10 Peter Stephenson wrote:
> @@ -3545,6 +3546,21 @@ spacesplit(char *s, int allownull, int heap, int quote) }
> if (!allownull && t != s)
> *ptr++ = dup("");
> + if (isset(POSIXSTRINGS) && ptr != eptr + 1) {
> + /*
> + * Trailing separators do not generate extra fields in POSIX.
> + * Note this is only the final separator --- if the
> + * immediately preceding field was null it is still counted.
> + * So just back up one.
> + */
> + --ptr;
> + if (!heap) {
> + char **ret2 = realloc(ret, sizeof(*ret) * (ptr+1-ret));
> + ptr -= ret-ret2;
> + free(ret);
> + ret = ret2;
> + }
> + }
> *ptr = NULL;
> return ret;
> }
Is it correct when you free() the pointer that you previously gave to
realloc()? Could not it cause a double free()?
Kamil
next prev parent reply other threads:[~2017-08-08 11:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 2:03 Martijn Dekker
2017-08-04 10:56 ` Stephane Chazelas
2017-08-04 11:13 ` Peter Stephenson
2017-08-06 18:08 ` Peter Stephenson
2017-08-06 20:01 ` Peter Stephenson
2017-08-08 10:56 ` Kamil Dudka [this message]
2017-08-08 12:17 ` Peter Stephenson
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