[perl #25250] close doesn't return false when a piped open exits with a non zero code

# New Ticket Created by  Olivier Blin 
# Please include the string:  [perl #25250]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=25250 >


This is a bug report for perl from blino@mandrake.org,
generated with the help of perlbug 1.34 running under perl v5.8.3.


-----------------------------------------------------------------
[Please enter your report here]

If a program opened through a piped open exits with a non-zero code,
close doesn't return false when this pipe is closed.

It doesn't behave as described in perlfunc manpage :
If the file handle came from a piped open "close" will addi-
tionally return false if one of the other system calls involved
fails or if the program exits with non-zero status.

(by the way, this sentence is quite hard to understand, please add a
comma before "close")

Here's an example from debugger :

  DB<1> p `cat ./foo.sh`
exit 6

  DB<2> open FOO, "./foo.sh |"; while (<FOO>) {}

  DB<3> x close FOO
0  ''
  DB<4> p $? >> 8
6

[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=core
    severity=medium
---
Site configuration information for perl v5.8.3:

Configured by pixel at Wed Jan 21 01:29:07 CET 2004.

Summary of my perl5 (revision 5.0 version 8 subversion 3) configuration:
  Platform:
    osname=linux, osvers=2.6.0-1mdkenterprise, archname=i386-linux-thread-multi
    uname='linux no.mandrakesoft.com 2.6.0-1mdkenterprise #1 smp thu dec 18 16:11:28 est 2003 i686 unknown unknown gnulinux '
    config_args='-des -Dinc_version_list=5.8.2/i386-linux-thread-multi 5.8.2 5.8.1/i386-linux-thread-multi 5.8.1 5.8.0/i386-linux-thread-multi 5.8.0 5.6.1 5.6.0 -Darchname=i386-linux -Dcc=gcc -Doptimize=-O2 -fomit-frame-pointer -pipe -march=i586 -mcpu=pentiumpro  -Dprefix=/usr -Dvendorprefix=/usr -Dsiteprefix=/usr -Dman3ext=3pm -Dcf_by=MandrakeSoft -Dmyhostname=localhost -Dperladmin=root@localhost -Dd_dosuid -Ud_csh -Duseshrplib -Dusethreads'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O2 -fomit-frame-pointer -pipe -march=i586 -mcpu=pentiumpro ',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -fno-strict-aliasing -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='3.3.2 (Mandrake Linux 10.0 3.3.2-4mdk)', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldl -lm -lcrypt -lutil -lpthread -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.3.3.so, so=so, useshrplib=true, libperl=libperl.so
    gnulibc_version='2.3.3'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic -Wl,-rpath,/usr/lib/perl5/5.8.3/i386-linux-thread-multi/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'

Locally applied patches:
    

---
@INC for perl v5.8.3:
    /usr/lib/perl5/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/5.8.3
    /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.3
    /usr/lib/perl5/site_perl/5.8.2/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.2
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.3
    /usr/lib/perl5/vendor_perl/5.8.2/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.2
    /usr/lib/perl5/vendor_perl/5.8.1/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.1
    /usr/lib/perl5/vendor_perl/5.8.0
    /usr/lib/perl5/vendor_perl
    .

---
Environment for perl v5.8.3:
    HOME=/home/olivier
    LANG=fr_FR
    LANGUAGE=fr_FR:fr
    LC_ADDRESS=fr_FR
    LC_COLLATE=fr_FR
    LC_CTYPE=fr_FR
    LC_IDENTIFICATION=fr_FR
    LC_MEASUREMENT=fr_FR
    LC_MESSAGES=fr_FR
    LC_MONETARY=fr_FR
    LC_NAME=fr_FR
    LC_NUMERIC=fr_FR
    LC_PAPER=fr_FR
    LC_TELEPHONE=fr_FR
    LC_TIME=fr_FR
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/bin:/usr/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/local/bin:/opt/X11R6/bin:/usr/bin:/usr/games:/home/olivier/bin:/sbin:/usr/sbin:/usr/local/j2re1.4.2_01/bin
    PERL_BADLANG (unset)
    SHELL=/bin/bash

• [perl #25250] close doesn't return false when a piped open exits with a non zero code by Olivier Blin