From @millert

Test 7 of io/dup fails. Reading from the dup'd file handle fails
with EBADF. Setting $|=1 doesn't make a difference but changing
the open of R1 from < or +< *does* makes the test succeed, which
strikes me as odd. From a ktrace, however, I don't see the kernel
returning EBADF at all. What I see is that the read, before the
dup, from R1 slurps up both lines and the subsequent read from the
dup'd handle returns 0 (since there are no bytes left to read).
Now, when we open R1 with +< there *is* a line to read from R2. I
have no idea why that would be, but I'm not convinced that this
test is at all legal since stdio is pretty much guaranteed to buffer
things behind your back on some (most?) systems. There's even a
warning about this in the perlfunc man page "Duping a filehandle
does not take into account any existing contents of stdio buffers."

Perl Info



Site configuration information for perl 5.00561:

Configured by millert at Wed Aug 25 01:50:05 MDT 1999.

Summary of my perl5 (revision 5.0 version 5 subversion 61) configuration:
  Platform:
    osname=openbsd, osvers=2.5, archname=i386-openbsd
    uname='openbsd xerxes.cs.colorado.edu 2.5 xerxes#1 i386 '
    config_args='-ds -e -Dprefix=/usr/local/perl5.005_61'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef useperlio=undef d_sfio=undef
    use64bits=undef usemultiplicity=undef
  Compiler:
    cc='cc', optimize='-O2', gccversion=2.95 19990718 (prerelease)
    cppflags='-I/usr/local/include'
    ccflags ='-I/usr/local/include'
    stdchar='char', d_stdstdio=undef, usevfork=true
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    alignbytes=4, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='ld', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib
    libs=-lm -lc
    libc=/usr/lib/libc.a, so=so, useshrplib=false, libperl=libperl.a
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=define, ccdlflags=' '
    cccdlflags='-DPIC -fPIC ', lddlflags='-Bforcearchive -Bshareable  -L/usr/local/lib'

Locally applied patches:
    


@INC for perl 5.00561:
    /usr/local/perl5.005_61/lib/5.00561/i386-openbsd
    /usr/local/perl5.005_61/lib/5.00561
    /usr/local/perl5.005_61/lib/site_perl/5.00561/i386-openbsd
    /usr/local/perl5.005_61/lib/site_perl
    .


Environment for perl 5.00561:
    HOME=/home/millert
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/usr/local/perl5.005_61/bin:/home/millert/bin/OpenBSD.i386:/home/millert/bin:/home/millert/bin/scripts:/usr/local/gnu/bin:/usr/local/bin:/usr/local/sbin:/usr/local/etc:/usr/local/rcs/bin:/usr/local/mh/bin:/usr/local/news/bin:/usr/local/emacs/bin:/usr/local/netpbm/bin:/usr/local/mtools/bin:/usr/local/netscape/bin:/usr/local/ghostscript/bin:/usr/local/X.V11R5/bin:/usr/local/X.V11R6/bin:/usr/local/frame/bin:/usr/local/teTeX/bin:/usr/local/cvs-1.10.1/bin:/usr/local/games/bin:/usr/local/archivers/bin:/usr/local/ssh/bin:/usr/local/skey/bin:/bin:/sbin:/usr/games:/usr/bin:/usr/sbin:/usr/etc:/etc:/usr/X11/bin/.:/usr/X11R6/bin/.:/usr/local/bin/.:/usr/obj/bin/.:/usr/src/bin/.
    PERL_BADLANG (unset)
    SHELL=/usr/local/bin/tcsh

Complete configuration data for perl 5.00561:

Author=''
CONFIG='true'
CONFIGDOTSH='true'
Date='$Date'
Header=''
Id='$Id'
Locker=''
Log='$Log'
Mcc='Mcc'
PATCHLEVEL='5'
PERL_REVISION='5'
PERL_SUBVERSION='61'
PERL_VERSION='5'
RCSfile='$RCSfile'
Revision='$Revision'
SUBVERSION='61'
Source=''
State=''
_a='.a'
_exe=''
_o='.o'
afs='false'
alignbytes='4'
ansi2knr=''
aphostname='/bin/hostname'
apiversion='5.00561'
ar='ar'
archlib='/usr/local/perl5.005_61/lib/5.00561/i386-openbsd'
archlibexp='/usr/local/perl5.005_61/lib/5.00561/i386-openbsd'
archname='i386-openbsd'
archname64=''
archobjs=''
awk='awk'
baserev='5.0'
bash=''
bin='/usr/local/perl5.005_61/bin'
bincompat5005='define'
binexp='/usr/local/perl5.005_61/bin'
bison=''
byacc='byacc'
byteorder='1234'
c=''
castflags='0'
cat='cat'
cc='cc'
cccdlflags='-DPIC -fPIC '
ccdlflags=' '
ccflags='-I/usr/local/include'
ccsymbols='__GNUC_MINOR__=95 __GNUC__=2 __OpenBSD__=1 cpu=i386 machine=i386 system=OpenBSD system=unix'
cf_by='millert'
cf_email='millert@xerxes.cs.colorado.edu'
cf_time='Wed Aug 25 01:50:05 MDT 1999'
chgrp=''
chmod=''
chown=''
clocktype='clock_t'
comm='comm'
compress=''
config_arg0='Configure'
config_arg1='-ds'
config_arg2='-e'
config_arg3='-Dprefix=/usr/local/perl5.005_61'
config_argc='3'
config_args='-ds -e -Dprefix=/usr/local/perl5.005_61'
contains='grep'
cp='cp'
cpio=''
cpp='cpp'
cpp_stuff='42'
cppccsymbols='__i386__=1 __unix__=1'
cppflags='-I/usr/local/include'
cpplast='-'
cppminus='-'
cpprun='cc -E'
cppstdin='cc -E'
cppsymbols='__STDC__=1'
crosscompile=''
cryptlib=''
csh='csh'
d_Gconvert='sprintf((b),"%.*g",(n),(x))'
d_PRIEldbl='define'
d_PRIFldbl='define'
d_PRIGldbl='define'
d_PRIX64='define'
d_PRId64='define'
d_PRIeldbl='define'
d_PRIfldbl='define'
d_PRIgldbl='define'
d_PRIi64='define'
d_PRIo64='define'
d_PRIu64='define'
d_PRIx64='define'
d_access='define'
d_accessx=''
d_alarm='define'
d_archlib='define'
d_atolf=''
d_atoll=''
d_attribut='define'
d_bcmp='define'
d_bcopy='define'
d_bincompat5005='define'
d_bsd='define'
d_bsdgetpgrp=''
d_bsdsetpgrp='define'
d_bzero='define'
d_casti32=''
d_castneg='define'
d_charvspr=''
d_chown='define'
d_chroot='define'
d_chsize=''
d_closedir='define'
d_cmsghdr_s='define'
d_const='define'
d_crypt='define'
d_csh='define'
d_cuserid=''
d_dbl_dig='define'
d_difftime='define'
d_dirnamlen='define'
d_dlerror='define'
d_dlopen='define'
d_dlsymun='define'
d_dosuid=''
d_drand48proto='define'
d_dup2='define'
d_eaccess=''
d_endgrent='define'
d_endhent='define'
d_endnent='define'
d_endpent='define'
d_endpwent='define'
d_endsent='define'
d_endspent=''
d_eofnblk='define'
d_eunice=''
d_fchmod='define'
d_fchown='define'
d_fcntl='define'
d_fd_macros='define'
d_fd_set='define'
d_fds_bits='define'
d_fgetpos='define'
d_flexfnam='define'
d_flock='define'
d_fork='define'
d_fpathconf='define'
d_fpos64_t=''
d_fseeko=''
d_fsetpos='define'
d_fstatfs='define'
d_fstatvfs=''
d_ftello=''
d_ftime=''
d_getgrent='define'
d_getgrps='define'
d_gethbyaddr='define'
d_gethbyname='define'
d_gethent='define'
d_gethname='define'
d_gethostprotos='define'
d_getlogin='define'
d_getmntent=''
d_getnbyaddr='define'
d_getnbyname='define'
d_getnent='define'
d_getnetprotos='define'
d_getpbyname='define'
d_getpbynumber='define'
d_getpent='define'
d_getpgid='define'
d_getpgrp='define'
d_getpgrp2=''
d_getppid='define'
d_getprior='define'
d_getprotoprotos='define'
d_getpwent='define'
d_getsbyname='define'
d_getsbyport='define'
d_getsent='define'
d_getservprotos='define'
d_getspent=''
d_getspnam=''
d_gettimeod='define'
d_gnulibc=''
d_grpasswd='define'
d_hasmntopt=''
d_htonl='define'
d_index=''
d_inetaton='define'
d_int64t=''
d_iovec_s=''
d_isascii='define'
d_killpg='define'
d_lchown='define'
d_ldbl_dig='define'
d_link='define'
d_llseek=''
d_locconv='define'
d_lockf='define'
d_longdbl='define'
d_longlong='define'
d_lstat='define'
d_madvise='define'
d_mblen='define'
d_mbstowcs='define'
d_mbtowc='define'
d_memchr='define'
d_memcmp='define'
d_memcpy='define'
d_memmove='define'
d_memset='define'
d_mkdir='define'
d_mkfifo='define'
d_mktime='define'
d_mmap='define'
d_mprotect='define'
d_msg='define'
d_msg_ctrunc='define'
d_msg_dontroute='define'
d_msg_oob='define'
d_msg_peek='define'
d_msg_proxy=''
d_msgctl='define'
d_msgget='define'
d_msghdr_s='define'
d_msgrcv='define'
d_msgsnd='define'
d_msync='define'
d_munmap='define'
d_mymalloc=''
d_nice='define'
d_off64_t=''
d_old_pthread_create_joinable=''
d_oldpthreads=''
d_oldsock=''
d_open3='define'
d_pathconf='define'
d_pause='define'
d_phostname=''
d_pipe='define'
d_poll='define'
d_portable='define'
d_pthread_yield=''
d_pwage=''
d_pwchange='define'
d_pwclass='define'
d_pwcomment=''
d_pwexpire='define'
d_pwgecos='define'
d_pwpasswd='define'
d_pwquota=''
d_readdir='define'
d_readlink='define'
d_readv='define'
d_recvmsg='define'
d_rename='define'
d_rewinddir='define'
d_rmdir='define'
d_safebcpy='define'
d_safemcpy='define'
d_sanemcmp='define'
d_sched_yield=''
d_scm_rights='define'
d_seekdir='define'
d_select='define'
d_sem='define'
d_semctl='define'
d_semctl_semid_ds='define'
d_semctl_semun='define'
d_semget='define'
d_semop='define'
d_sendmsg='define'
d_setegid='define'
d_seteuid='define'
d_setgrent='define'
d_setgrps='define'
d_sethent='define'
d_setlinebuf='define'
d_setlocale='define'
d_setnent='define'
d_setpent='define'
d_setpgid='define'
d_setpgrp='define'
d_setpgrp2=''
d_setprior='define'
d_setpwent='define'
d_setregid=''
d_setresgid=''
d_setresuid=''
d_setreuid=''
d_setrgid=''
d_setruid=''
d_setsent='define'
d_setsid='define'
d_setspent=''
d_setvbuf='define'
d_sfio=''
d_shm='define'
d_shmat='define'
d_shmatprototype='define'
d_shmctl='define'
d_shmdt='define'
d_shmget='define'
d_sigaction='define'
d_sigsetjmp='define'
d_socket='define'
d_sockpair='define'
d_statblks='define'
d_statfs='define'
d_statfsflags='define'
d_statvfs=''
d_stdio_cnt_lval=''
d_stdio_ptr_lval=''
d_stdio_stream_array='define'
d_stdiobase=''
d_stdstdio=''
d_strchr='define'
d_strcoll='define'
d_strctcpy='define'
d_strerrm='strerror(e)'
d_strerror='define'
d_strtod='define'
d_strtol='define'
d_strtoul='define'
d_strtoull=''
d_strxfrm='define'
d_suidsafe='define'
d_symlink='define'
d_syscall='define'
d_sysconf='define'
d_sysernlst=''
d_syserrlst='define'
d_system='define'
d_tcgetpgrp='define'
d_tcsetpgrp='define'
d_telldir='define'
d_telldirproto='define'
d_time='define'
d_times='define'
d_truncate='define'
d_tzname='define'
d_umask='define'
d_uname='define'
d_union_semun=''
d_vendorlib=''
d_vfork='define'
d_void_closedir=''
d_voidsig='define'
d_voidtty=''
d_volatile='define'
d_vprintf='define'
d_wait4='define'
d_waitpid='define'
d_wcstombs='define'
d_wctomb='define'
d_writev='define'
d_xenix=''
date='date'
db_hashtype='u_int32_t'
db_prefixtype='size_t'
defvoidused='15'
direntrytype='struct dirent'
dlext='so'
dlsrc='dl_dlopen.xs'
doublesize='8'
drand01='drand48()'
dynamic_ext='B ByteLoader DB_File Data/Dumper Devel/DProf Devel/Peek Fcntl IO IPC/SysV NDBM_File Opcode POSIX SDBM_File Socket attrs re'
eagain='EAGAIN'
ebcdic=''
echo='echo'
egrep='egrep'
emacs=''
eunicefix=':'
exe_ext=''
expr='expr'
extensions='B ByteLoader DB_File Data/Dumper Devel/DProf Devel/Peek Fcntl IO IPC/SysV NDBM_File Opcode POSIX SDBM_File Socket attrs re Errno'
fflushNULL='define'
fflushall=''
find=''
firstmakefile='makefile'
flex=''
fpostype='fpos_t'
freetype='void'
full_ar='/usr/bin/ar'
full_csh='/bin/csh'
full_sed='/usr/bin/sed'
gccversion='2.95 19990718 (prerelease)'
gidtype='gid_t'
glibpth='/usr/shlib  /shlib /lib/pa1.1 /usr/lib/large /lib /usr/lib /usr/lib/386 /lib/386 /lib/large /usr/lib/small /lib/small /usr/ccs/lib /usr/ucblib /usr/local/lib '
grep='grep'
groupcat='cat /etc/group'
groupstype='gid_t'
gzip='gzip'
h_fcntl='false'
h_sysfile='true'
hint='recommended'
hostcat='cat /etc/hosts'
huge=''
i_arpainet='define'
i_bsdioctl=''
i_db='define'
i_dbm=''
i_dirent='define'
i_dld=''
i_dlfcn='define'
i_fcntl=''
i_float='define'
i_gdbm=''
i_grp='define'
i_inttypes='define'
i_limits='define'
i_locale='define'
i_machcthr=''
i_malloc='define'
i_math='define'
i_memory=''
i_mntent=''
i_ndbm='define'
i_netdb='define'
i_neterrno=''
i_netinettcp='define'
i_niin='define'
i_poll='define'
i_pthread=''
i_pwd='define'
i_rpcsvcdbm=''
i_sfio=''
i_sgtty=''
i_shadow=''
i_socks='define'
i_stdarg='define'
i_stddef='define'
i_stdlib='define'
i_string='define'
i_sysaccess=''
i_sysdir='define'
i_sysfile='define'
i_sysfilio='define'
i_sysin=''
i_sysioctl='define'
i_sysmman='define'
i_sysmount='define'
i_sysndir=''
i_sysparam='define'
i_sysresrc='define'
i_syssecrt=''
i_sysselct='define'
i_syssockio=''
i_sysstat='define'
i_sysstatvfs=''
i_systime='define'
i_systimek=''
i_systimes='define'
i_systypes='define'
i_sysuio='define'
i_sysun='define'
i_syswait='define'
i_termio=''
i_termios='define'
i_time=''
i_unistd='define'
i_utime='define'
i_values=''
i_varargs=''
i_varhdr='stdarg.h'
i_vfork=''
ignore_versioned_solibs=''
incpath=''
inews=''
installarchlib='/usr/local/perl5.005_61/lib/5.00561/i386-openbsd'
installbin='/usr/local/perl5.005_61/bin'
installman1dir='/usr/local/perl5.005_61/man/man1'
installman3dir='/usr/local/perl5.005_61/man/man3'
installprefix='/usr/local/perl5.005_61'
installprefixexp='/usr/local/perl5.005_61'
installprivlib='/usr/local/perl5.005_61/lib/5.00561'
installscript='/usr/local/perl5.005_61/bin'
installsitearch='/usr/local/perl5.005_61/lib/site_perl/5.00561/i386-openbsd'
installsitelib='/usr/local/perl5.005_61/lib/site_perl'
installstyle='lib'
installusrbinperl='define'
installvendorlib=''
intsize='4'
known_extensions='B ByteLoader DB_File Data/Dumper Devel/DProf Devel/Peek Fcntl GDBM_File IO IPC/SysV NDBM_File ODBM_File Opcode POSIX SDBM_File Socket Thread attrs re'
ksh=''
large=''
ld='ld'
lddlflags='-Bforcearchive -Bshareable  -L/usr/local/lib'
ldflags=' -L/usr/local/lib'
ldlibpthname='LD_LIBRARY_PATH'
less='less'
lib_ext='.a'
libc='/usr/lib/libc.a'
libperl='libperl.a'
libpth='/usr/local/lib /usr/lib'
libs='-lm -lc'
libswanted='sfio socket inet nsl nm ndbm gdbm dbm db malloc dl dld ld sun m c cposix posix ndir dir sec ucb bsd BSD PW x'
line=''
lint=''
lkflags=''
ln='ln'
lns='/bin/ln -s'
locincpth='/usr/local/include /opt/local/include /usr/gnu/include /opt/gnu/include /usr/GNU/include /opt/GNU/include'
loclibpth='/usr/local/lib /opt/local/lib /usr/gnu/lib /opt/gnu/lib /usr/GNU/lib /opt/GNU/lib'
longdblsize='12'
longlongsize='8'
longsize='4'
lp=''
lpr=''
ls='ls'
lseeksize='8'
lseektype='off_t'
mail=''
mailx=''
make='make'
make_set_make='#'
mallocobj=''
mallocsrc=''
malloctype='void *'
man1dir='/usr/local/perl5.005_61/man/man1'
man1direxp='/usr/local/perl5.005_61/man/man1'
man1ext='1'
man3dir='/usr/local/perl5.005_61/man/man3'
man3direxp='/usr/local/perl5.005_61/man/man3'
man3ext='3'
medium=''
mips=''
mips_type=''
mkdir='mkdir'
mmaptype='caddr_t'
models='none'
modetype='mode_t'
more='more'
multiarch=''
mv=''
myarchname='i386-openbsd'
mydomain='.cs.colorado.edu'
myhostname='xerxes'
myuname='openbsd xerxes.cs.colorado.edu 2.5 xerxes#1 i386 '
n='-n'
netdb_hlen_type='int'
netdb_host_type='const char *'
netdb_name_type='const char *'
netdb_net_type='in_addr_t'
nm='nm'
nm_opt=''
nm_so_opt=''
nonxs_ext='Errno'
nroff='nroff'
o_nonblock='O_NONBLOCK'
obj_ext='.o'
old_pthread_create_joinable=''
optimize='-O2'
orderlib='false'
osname='openbsd'
osvers='2.5'
package='perl5'
pager='/usr/bin/less'
passcat='cat /etc/passwd'
patchlevel='5'
path_sep=':'
perl=''
perladmin='millert@xerxes.cs.colorado.edu'
perlpath='/usr/local/perl5.005_61/bin/perl'
pg='pg'
phostname='hostname'
pidtype='pid_t'
plibpth=''
pmake=''
pr=''
prefix='/usr/local/perl5.005_61'
prefixexp='/usr/local/perl5.005_61'
privlib='/usr/local/perl5.005_61/lib/5.00561'
privlibexp='/usr/local/perl5.005_61/lib/5.00561'
prototype='define'
ptrsize='4'
randbits='48'
randfunc='drand48'
randseedtype='long'
ranlib='/usr/bin/ranlib'
rd_nodata='-1'
rm='rm'
rmail=''
runnm='true'
sPRIEldbl='"LE"'
sPRIFldbl='"LF"'
sPRIGldbl='"LG"'
sPRIX64='"llX"'
sPRId64='"lld"'
sPRIeldbl='"Le"'
sPRIfldbl='"Lf"'
sPRIgldbl='"Lg"'
sPRIi64='"lli"'
sPRIo64='"llo"'
sPRIu64='"llu"'
sPRIx64='"llx"'
sched_yield=''
scriptdir='/usr/local/perl5.005_61/bin'
scriptdirexp='/usr/local/perl5.005_61/bin'
sed='sed'
seedfunc='srand48'
selectminbits='32'
selecttype='fd_set *'
sendmail=''
sh='/bin/sh'
shar=''
sharpbang='#!'
shmattype='char *'
shortsize='2'
shrpenv=''
shsharp='true'
sig_count='32'
sig_name='ZERO HUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM URG STOP TSTP CONT CHLD TTIN TTOU IO XCPU XFSZ VTALRM PROF WINCH INFO USR1 USR2 IOT '
sig_name_init='"ZERO", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS", "PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP", "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU", "XFSZ", "VTALRM", "PROF", "WINCH", "INFO", "USR1", "USR2", "IOT", 0'
sig_num='0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 6 '
sig_num_init='0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 6, 0'
signal_t='void'
sitearch='/usr/local/perl5.005_61/lib/site_perl/5.00561/i386-openbsd'
sitearchexp='/usr/local/perl5.005_61/lib/site_perl/5.00561/i386-openbsd'
sitelib='/usr/local/perl5.005_61/lib/site_perl'
sitelibexp='/usr/local/perl5.005_61/lib/site_perl'
siteprefix='/usr/local/perl5.005_61'
siteprefixexp='/usr/local/perl5.005_61'
sizetype='size_t'
sleep=''
smail=''
small=''
so='so'
sockethdr=''
socketlib=''
sort='sort'
spackage='Perl5'
spitshell='cat'
split=''
src='.'
ssizetype='ssize_t'
startperl='#!/usr/local/perl5.005_61/bin/perl'
startsh='#!/bin/sh'
static_ext=' '
stdchar='char'
stdio_base='((fp)->_base)'
stdio_bufsiz='((fp)->_cnt + (fp)->_ptr - (fp)->_base)'
stdio_cnt='((fp)->_cnt)'
stdio_filbuf=''
stdio_ptr='((fp)->_ptr)'
stdio_stream_array='__sF'
strings='/usr/include/string.h'
submit=''
subversion='61'
sysman='/usr/man/man1'
tail=''
tar=''
tbl=''
tee=''
test='test'
timeincl='/usr/include/sys/time.h '
timetype='time_t'
touch='touch'
tr='tr'
trnl='\n'
troff=''
uidtype='uid_t'
uname='uname'
uniq='uniq'
use64bits=''
usedl='define'
uselongdouble=''
usemultiplicity=''
usemymalloc='n'
usenm='true'
useopcode='true'
useperlio=''
useposix='true'
usesfio='false'
useshrplib='false'
usesocks=''
usethreads=''
usevendorprefix=''
usevfork='true'
usrinc='/usr/include'
uuname=''
vendorlib=''
vendorlibexp=''
vendorprefix=''
vendorprefixexp=''
version='5.00561'
vi=''
voidflags='15'
xlibpth='/usr/lib/386 /lib/386'
zcat=''
zip='zip'

Not OK: perl 5.00561 on i386-openbsd 2.5 #431

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