Public bug reported:
As I described in BTS of gscan2pdf,
https://sourceforge.net/tracker/?func=detail&aid=3485387&group_id=174140&atid=868098
libsane-perl: Sane.xs have a bug when length=0 is returned from backend while
sane_read().
It is occured with epjitsu backend driver that is used for Fujitsu SnapScan
S300 scanner.
Sane.xs:
------------------
void
sane_read (handle, max_length)
SANE_Handle handle
SANE_Int max_length
INIT:
SANE_Status status;
SANE_Byte * data;
SANE_Int length;
PPCODE:
data = malloc (max_length);
status = sane_read (handle, data, max_length, &length);
SV* sv = get_sv("Sane::_status", FALSE);
sv_setiv(sv, status);
if (status) {
XPUSHs(sv_2mortal(newSV(0)));
XPUSHs(sv_2mortal(newSViv(0)));
}
else {
XPUSHs(sv_2mortal(newSVpv(data, length)));
XPUSHs(sv_2mortal(newSViv(length)));
}
free (data);
--------------
when call newSVpv(data, length) with length=0, that means 'auto detect length
of string of data'.
But length=0 should treat as 'no data'.
If (const char *)data consist by other than '\0', it happens that no-
needed bytes is returned.
That is happend with S300 scaner and gscan2pdf, scanimage-perl, and
scanadf-perl utilities.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: libsane-perl 0.03-1build1
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sat Feb 11 15:31:17 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
PATH=(custom, user)
LANG=ja_JP.UTF-8
SHELL=/bin/bash
SourcePackage: libsane-perl
UpgradeStatus: Upgraded to oneiric on 2011-12-24 (49 days ago)
** Affects: libsane-perl (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug oneiric running-unity
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https://bugs.launchpad.net/bugs/930552
Title:
produce broken scan image with snapscan S300 scanner
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