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[ID 20001112.008] perlio.c's PerlIO_getpos ingores error return
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From:
Nicholas Clark
Date:
November 12, 2000 14:40
Subject:
[ID 20001112.008] perlio.c's PerlIO_getpos ingores error return
Message ID:
E13v4S3-0000iY-00@Bagpuss.unfortu.net
This is a bug report for perl from nick@talking.bollo.cx,
generated with the help of perlbug 1.32 running under perl v5.7.0.
-----------------------------------------------------------------
[Please enter your report here]
perlio.c's fgetpos emulation for systems without GETPOS (eg sfio) is broken:
#ifndef HAS_FGETPOS
#undef PerlIO_getpos
int
PerlIO_getpos(PerlIO *f, Fpos_t *pos)
{
*pos = PerlIO_tell(f);
return 0;
}
Breakage 1: it igores error returns from tell.
Breakage 2: (By inspection) it's going to give warnings about incompatible
structure types for any (presumably obscure) system were Fpos_t is
a structure (MVS?) and Off_t is integer.
because
Off_t PerlIO_tell(PerlIO *f);
is being assigned to a lvalue of type Fpos_t
patch against 5.7.1, cures breakage 1, still breaks 2.
Problem present in source back at least as far as 5.005_03
--- perlio.c.orig Sat Nov 11 16:44:44 2000
+++ perlio.c Sun Nov 12 17:47:25 2000
@@ -2314,7 +2314,7 @@
PerlIO_getpos(PerlIO *f, Fpos_t *pos)
{
*pos = PerlIO_tell(f);
- return 0;
+ return *pos != -1;
}
#else
#ifndef PERLIO_IS_STDIO
Nicholas Clark
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=low
---
Site configuration information for perl v5.7.0:
Configured by nick at Sat Oct 21 11:14:10 BST 2000.
Summary of my perl5 (revision 5.0 version 7 subversion 0) configuration:
Platform:
osname=linux, osvers=2.2.17-rmk1, archname=armv4l-linux-64int
uname='linux bagpuss.unfortu.net 2.2.17-rmk1 #5 mon sep 18 19:03:46 bst 2000 armv4l unknown '
config_args=''
hint=previous, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
useperlio=define d_sfio=define uselargefiles=define usesocks=undef
use64bitint=define use64bitall=undef uselongdouble=undef
Compiler:
cc='/usr/local/bin/gcc', ccflags ='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
ccversion='', gccversion='2.95.2 20000516 (release) [Rebel.com]', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
ivtype='long long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, usemymalloc=n, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lsfio -lnsl -lndbm -ldb -ldl -lm -lc -lposix -lcrypt -lutil
perllibs=-lsfio -lnsl -ldl -lm -lc -lposix -lcrypt -lutil
libc=/lib/libc-2.1.3.so, so=so, useshrplib=false, libperl=libperl.a
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Locally applied patches:
DEVEL7385
---
@INC for perl v5.7.0:
/usr/local/lib/perl5/5.7.0/armv4l-linux
/usr/local/lib/perl5/5.7.0
/usr/local/lib/perl5/site_perl/5.7.0/armv4l-linux
/usr/local/lib/perl5/site_perl/5.7.0
/usr/local/lib/perl5/site_perl
.
---
Environment for perl v5.7.0:
HOME=/home/nick
LANG (unset)
LANGUAGE (unset)
LC_CTYPE=en_GB.ISO-8859-1
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/nick/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/sbin:/usr/sbin:/usr/local/sbin
PERL_BADLANG (unset)
SHELL=/bin/bash
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[ID 20001112.008] perlio.c's PerlIO_getpos ingores error return
by Nicholas Clark