Re: [PATCH 3/4] gnu: Add Swish-e.

[Leo Famulari <leo@famulari.name>]

On Tue, Aug 23, 2016 at 01:49:12AM -0500, Eric Bavier wrote:
> * gnu/packages/search.scm (swish-e): New variable.
> * gnu/packages/patches/swish-e-search.patch,
> gnu/packages/patches/swish-e-format-security.patch: New patches.
> * gnu/local.mk (dist_patch_DATA): Add them.

It would be ideal to present these patches to the upstream maintainers,
but their site is offline. Do we know if the project is still active?

> diff --git a/gnu/packages/patches/swish-e-format-security.patch b/gnu/packages/patches/swish-e-format-security.patch
> new file mode 100644
> index 0000000..be9d7cb
> --- /dev/null
> +++ b/gnu/packages/patches/swish-e-format-security.patch
> @@ -0,0 +1,33 @@
> +Borrowed from Debian.
> +
> +--- swish-e-2.4.7/src/parser.c	2009-04-05 03:58:32.000000000 +0200
> ++++ swish-e-2.4.7/src/parser.c	2013-06-11 13:53:08.196559035 +0200
> +@@ -1760,7 +1760,7 @@
> +     va_start(args, msg);
> +     vsnprintf(str, 1000, msg, args );
> +     va_end(args);
> +-    xmlParserError(parse_data->ctxt, str);
> ++    xmlParserError(parse_data->ctxt, "%s", str);
> + }
> + 
> + static void warning(void *data, const char *msg, ...)
> +@@ -1772,7 +1772,7 @@
> +     va_start(args, msg);
> +     vsnprintf(str, 1000, msg, args );
> +     va_end(args);
> +-    xmlParserWarning(parse_data->ctxt, str);
> ++    xmlParserWarning(parse_data->ctxt, "%s", str);
> + }

My understanding is that xmlParserWarning() is from libxml2, defined in
'xmlerror.h' like this:

XMLPUBFUN void XMLCDECL
    xmlParserWarning            (void *ctx,
                                 const char *msg,
                                 ...) LIBXML_ATTR_FORMAT(2,3);

I don't understand this definition very much, but in libxml2 file
'xmlversion.h', LIBXML_ATTR_FORMAT is commented with "Macro used to
indicate to GCC the parameter are printf like".

Somebody else should review this.

> +--- swish-e-2.4.7/src/result_output.c	2009-04-05 03:58:32.000000000 +0200
> ++++ swish-e-2.4.7/src/result_output.c	2013-06-11 13:53:38.593550825 +0200
> +@@ -752,7 +752,7 @@
> +             s = (char *) emalloc(MAXWORDLEN + 1);
> +             n = strftime(s, (size_t) MAXWORDLEN, fmt, localtime(&(pv->value.v_date)));
> +             if (n && f)
> +-                fprintf(f, s);
> ++                fprintf(f, "%s", s);

LGTM

> diff --git a/gnu/packages/patches/swish-e-search.patch b/gnu/packages/patches/swish-e-search.patch
> new file mode 100644
> index 0000000..2a57a31
> --- /dev/null
> +++ b/gnu/packages/patches/swish-e-search.patch
> @@ -0,0 +1,43 @@
> +From http://swish-e.org/archive/2015-09/13295.html

The site is offline, but I found it on archive.org:
https://web.archive.org/web/20150907203848/http://www.swish-e.org/archive/2015-09/13295.html

Interestingly, I'm a few blocks the patch author's office :)

As far as I can tell, nobody from swish-e ever replied.

> +
> +--- a/src/compress.c	
> ++++ a/src/compress.c	
> +@@ -995,7 +995,7 @@ void    remove_worddata_longs(unsigned char *worddata,int *sz_worddata)
> +             progerr("Internal error in remove_worddata_longs");
> + 
> +         /* dst may be smaller than src. So move the data */
> +-        memcpy(dst,src,data_len);
> ++        memmove(dst,src,data_len);

LGTM

> + 
> +         /* Increase pointers */
> +         src += data_len;
> +--- a/src/headers.c	
> ++++ a/src/headers.c	
> +@@ -280,7 +280,7 @@ static SWISH_HEADER_VALUE fetch_single_header( IndexFILE *indexf, HEADER_MAP *he
> + 
> +         case SWISH_NUMBER:
> +         case SWISH_BOOL:
> +-            value.number = *(unsigned long *) data_pointer;
> ++            value.number = *(unsigned int *) data_pointer;

Could there be any risk in reducing the size of the variable like this?

> + 
> +             /* $$$ Ugly hack alert! */
> +             /* correct for removed files */
> +--- a/src/swishspider	
> ++++ a/src/swishspider	
> +@@ -27,6 +27,7 @@ use LWP::UserAgent;
> + use HTTP::Status;
> + use HTML::Parser 3.00;
> + use HTML::LinkExtor;
> ++use Encode;
> + 
> +     if (scalar(@ARGV) != 2) {
> +         print STDERR "Usage: $0 localpath url\n";
> +@@ -94,7 +95,7 @@ use HTML::LinkExtor;
> +     # Don't allow links above the base
> +     $URI::ABS_REMOTE_LEADING_DOTS = 1;
> + 
> +-    $p->parse( $$content_ref );
> ++    $p->parse( decode_utf8 $$content_ref );

Can you explain why we need this?

> +(define-public swish-e

The package definition LGTM. I did not try to build it.