Bug#130574: marked as done (libc6: iconv(3) breaks on converting "\n" from UNICODE --> ISO-8859-1)
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and subject line Cannot reproduce with 2.3.1
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Date: Wed, 23 Jan 2002 19:49:11 +0100
From: Andreas Metzler <ametzler@downhill.at.eu.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: libc6: iconv(3) breaks on converting "\n" from UNICODE --> ISO-8859-1
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Package: libc6
Version: 2.2.4-7
Severity: normal
Hello,
I am Ccing Bruno Haible, apparently[1] the responsible man from the
glibc-team.
The program-snippet below will loop infinitly on glibc 2.2.4-7, but
not 2.1.3. It takes the string "\n" and tries to convert it from
UNICODE to ISO-8859-1, trouble is that iconv(3) does nothing, it
neither returns an error nor does it "increment inbuf", etc.
(I tried to produce a minimal testcase by stripping the code from the
tin-Newsreader, which got bitten by this bug.)
IMVVVVVHO it might be a good idea to drop UNICODE-support and let
iconv_open fail with errno EINVAL for ("ISO-8859-1", "UNICODE") like
libiconv-1.7 does:
from libiconv-1.7 notes:
| * UNICODE (big endian), UNICODEFEFF (little endian)
| We DON'T implement these because they are stupid and not
| standardized.
thanks for your work, cu andreas
[1] libc6/NEWS.gz:
| * Bruno Haible updated all the code handling Unicode in some form to
| support Unicode 3.1.
--------program snippet-------------------------
#include <iconv.h>
#include <stdlib.h>
#include <string.h>
int main(void);
int main() {
char line[]="\n";
char * obuf;
char * outbuf;
char * inbuf;
iconv_t cd;
size_t result;
size_t inbytesleft, outbytesleft;
// if ((cd = iconv_open("ISO-8859-1", "ISO-8859-15")) != (iconv_t) (-1)) {
if ((cd = iconv_open("ISO-8859-1", "UNICODE")) != (iconv_t) (-1)) {
inbuf = (char *) line;
inbytesleft = strlen (line);
outbytesleft = 1 + inbytesleft * 4; /* should be enough */
obuf = (char *) malloc (outbytesleft + 1);
outbuf = (char *) obuf;
do {
result = iconv (cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
if (result == (size_t) (-1)) /* Error occured */
break;
} while (inbytesleft > 0);
**&outbuf = '\0';
strcpy(line, obuf);
free(obuf);
iconv_close(cd);
}
return(0);
}
---------------------------------------------------------------------
-- System Information
Debian Release: 3.0
Architecture: i386
Kernel: Linux downhill 2.4.14csbadram #1 Die Dez 4 17:25:38 CET 2001 i586
Locale: LANG=de_AT, LC_CTYPE=de_AT
---------------------------------------
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Date: Fri, 14 Mar 2003 18:11:05 +0100
From: Andreas Metzler <ametzler@logic.univie.ac.at>
To: 130574-done@bugs.debian.org
Subject: Cannot reproduce with 2.3.1
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Hello,
I cannot reproduce this with 2.3.1-14 (at least the test program exits
normally.)
cu andreas
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