can't open() more than 256 files on Solaris

# New Ticket Created by  Robert Martin-Legène 
# Please include the string:  [perl #46749]
# in the subject line of all future correspondence about
this issue. 
# <URL: h
ttp://rt.perl.org/rt3/Ticket/Display.html?id=46749 >


This is a bug report for perl from robertmartin-legene.dk,
generated with the help of perlbug 1.34 running under perl
v5.8.0.


------------------------------------------------------------
-----
[Please enter your report here]
Seemingly on Solaris 7  sparc, Solaris 9  sparc, Solaris 10

intel I can't get perl to return file number 256 to me.
Truss
shows that up to file descriptor #255 are returned to the
script
as it is supposed to, but #256 is immediately closed by
perl, and
undef is returned.

open("/dev/null", O_RDONLY)                     =
255
fstat(255, 0x0010F9D8)                          = 0
fcntl(255, F_SETFD, 0x00000001)                 = 0
Just got fileno 255
write(1, " J u s t   g o t   f i l".., 20)      =
20
open("/dev/null", O_RDONLY)                     =
256
close(256)                                      = 0
getcontext(0xFFBFED58)
getcontext(0xFFBFEBF8)
open("/dev/null", O_RDONLY)                     =
256
close(256)                                      = 0
Perl's open() is b0rken: Too many open files, stopped at
./256.pl line 18.
write(2, " P e r l ' s   o p e n (".., 75)      =
75


$ ulimit -n 1234
$ ./256.pl
[...]
Just got fileno 252
Just got fileno 253
Just got fileno 254
Just got fileno 255
Perl's open() is b0rken: Too many open files, stopped at
./256.pl line 18.
$ cat 256.pl
#!/usr/bin/perl -w

use strict;
use warnings;
use IO::File;

my a;
while (1) {
  my $fh = new IO::File('/dev/null');
  if ($fh) {
    printf "Just got fileno %dn",
$fh->fileno;
    push a, $fh;
    exit if $fh->fileno > 1029;
  } else {
    last;
  }
}
open HAHA, "/dev/null" or die "Perl's open()
is b0rken: $!, stopped";

The extra open, is to make sure the fault is not in
IO::File.

.. and it's not an OS issue, because it works in C.

$ cat 256.c
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

main() {
  int fh;
  while (1) {
    fh = open("/dev/null", O_RDONLY);
    if (fh == -1) {
      perror("open");
      exit(1);
    }
    printf("Just got fileno %dn", fh);
    if (fh > 1030) exit(0);
  }
}
~
robertthunder (0)$ make 256
gcc     256.c   -o 256
$ ./256|tail -2
Just got fileno 1030
Just got fileno 1031


[Please do not change anything below this line]
------------------------------------------------------------
-----
---
Flags:
    category=core
    severity=high
---
Site configuration information for perl v5.8.0:

Configured by haarbo at Sun Jan 19 13:33:31 CET 2003.

Summary of my perl5 (revision 5.0 version 8 subversion 0)
configuration:
  Platform:
    osname=solaris, osvers=2.9, archname=sun4-solaris
    uname='sunos thunder 5.9 generic_112233-03 sun4u sparc
sunw,sun-fire-280r '
    config_args='-Dcc=gcc'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=undef
usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-fno-strict-aliasing',
    optimize='-O',
    cppflags='-fno-strict-aliasing'
    ccversion='', gccversion='3.2.1',
gccosandvers='solaris2.9'
    intsize=4, longsize=4, ptrsize=4, doublesize=8,
byteorder=4321
    d_longlong=define, longlongsize=8, d_longdbl=define,
longdblsize=16
    ivtype='long', ivsize=4, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=4
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib /usr/ccs/lib
    libs=-lsocket -lnsl -ldl -lm -lc
    perllibs=-lsocket -lnsl -ldl -lm -lc
    libc=, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef,
ccdlflags=' '
    cccdlflags='-fPIC', lddlflags='-G -L/usr/local/lib'

Locally applied patches:
    

---
INC
for perl v5.8.0:
    /usr/local/lib/perl5/5.8.0/sun4-solaris
    /usr/local/lib/perl5/5.8.0
    /usr/local/lib/perl5/site_perl/5.8.0/sun4-solaris
    /usr/local/lib/perl5/site_perl/5.8.0
    /usr/local/lib/perl5/site_perl
    .

---
Environment for perl v5.8.0:
    HOME=/home/robert
    LANG (unset)
    LANGUAGE (unset)
    LC_CTYPE=iso_8859_1
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
   
PATH=/home/robert/bin:/usr/local/bin:/home/robert/bin:/usr/l
ocal/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/l
ocal/sbin/:/usr/local/bin:/usr/bin:/usr/ccs/bin:/usr/ucb:/us
r/sbin:/opt/gnu/bin:/usr/local/ssl:/usr/local/ssl/bin:/usr/l
ocal/mysql/bin:/opt/SUNWppro/bin:/usr/sadm/bin:/usr/local/pe
rl:/usr/local/pim/bin:/usr/openwin/bin:/usr/local/sbin/:/usr
/local/bin:/usr/bin:/usr/ccs/bin:/usr/ucb:/usr/sbin:/opt/gnu
/bin:/usr/local/ssl:/usr/local/ssl/bin:/usr/local/mysql/bin:
/opt/SUNWppro/bin:/usr/sadm/bin:/usr/local/perl:/usr/local/p
im/bin:/usr/openwin/bin
    PERL_BADLANG (unset)
    SHELL=/usr/local/bin/bash

32-bit STDIO on Solaris doesn't support > 256 file
descriptors. Either 
compile for 64-bit, or I believe there was a libc.a work
around to 
re-enable this?

In any case, it isn't a Perl limitation.

Cheers,
mark


Robert Martin-Legène (via RT) wrote:
> # New Ticket Created by  Robert Martin-Legène 
> # Please include the string:  [perl #46749]
> # in the subject line of all future correspondence
about this issue. 
> # <URL: h
ttp://rt.perl.org/rt3/Ticket/Display.html?id=46749 >
>
>
> This is a bug report for perl from robertmartin-legene.dk,
> generated with the help of perlbug 1.34 running under
perl v5.8.0.
>
>
>
------------------------------------------------------------
-----
> [Please enter your report here]
> Seemingly on Solaris 7  sparc, Solaris 9  sparc,
Solaris 10
>  intel I can't get perl to return file number 256 to
me. Truss
> shows that up to file descriptor #255 are returned to
the script
> as it is supposed to, but #256 is immediately closed by
perl, and
> undef is returned.
>
> open("/dev/null", O_RDONLY)                  
  = 255
> fstat(255, 0x0010F9D8)                          = 0
> fcntl(255, F_SETFD, 0x00000001)                 = 0
> Just got fileno 255
> write(1, " J u s t   g o t   f i l".., 20)   
  = 20
> open("/dev/null", O_RDONLY)                  
  = 256
> close(256)                                      = 0
> getcontext(0xFFBFED58)
> getcontext(0xFFBFEBF8)
> open("/dev/null", O_RDONLY)                  
  = 256
> close(256)                                      = 0
> Perl's open() is b0rken: Too many open files, stopped
at ./256.pl line 18.
> write(2, " P e r l ' s   o p e n (".., 75)   
  = 75
>
>
> $ ulimit -n 1234
> $ ./256.pl
> [...]
> Just got fileno 252
> Just got fileno 253
> Just got fileno 254
> Just got fileno 255
> Perl's open() is b0rken: Too many open files, stopped
at ./256.pl line 18.
> $ cat 256.pl
> #!/usr/bin/perl -w
>
> use strict;
> use warnings;
> use IO::File;
>
> my a;
> while (1) {
>   my $fh = new IO::File('/dev/null');
>   if ($fh) {
>     printf "Just got fileno %dn",
$fh->fileno;
>     push a, $fh;
>     exit if $fh->fileno > 1029;
>   } else {
>     last;
>   }
> }
> open HAHA, "/dev/null" or die "Perl's
open() is b0rken: $!, stopped";
>
> The extra open, is to make sure the fault is not in
IO::File.
>
> .. and it's not an OS issue, because it works in C.
>
> $ cat 256.c
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
>
> main() {
>   int fh;
>   while (1) {
>     fh = open("/dev/null", O_RDONLY);
>     if (fh == -1) {
>       perror("open");
>       exit(1);
>     }
>     printf("Just got fileno %dn", fh);
>     if (fh > 1030) exit(0);
>   }
> }
> ~
> robertthunder (0)$ make 256
> gcc     256.c   -o 256
> $ ./256|tail -2
> Just got fileno 1030
> Just got fileno 1031
>
>
> [Please do not change anything below this line]
>
------------------------------------------------------------
-----
> ---
> Flags:
>     category=core
>     severity=high
> ---
> Site configuration information for perl v5.8.0:
>
> Configured by haarbo at Sun Jan 19 13:33:31 CET 2003.
>
> Summary of my perl5 (revision 5.0 version 8 subversion
0) configuration:
>   Platform:
>     osname=solaris, osvers=2.9, archname=sun4-solaris
>     uname='sunos thunder 5.9 generic_112233-03 sun4u
sparc sunw,sun-fire-280r '
>     config_args='-Dcc=gcc'
>     hint=recommended, useposix=true,
d_sigaction=define
>     usethreads=undef use5005threads=undef
useithreads=undef usemultiplicity=undef
>     useperlio=define d_sfio=undef uselargefiles=undef
usesocks=undef
>     use64bitint=undef use64bitall=undef
uselongdouble=undef
>     usemymalloc=n, bincompat5005=undef
>   Compiler:
>     cc='gcc', ccflags ='-fno-strict-aliasing',
>     optimize='-O',
>     cppflags='-fno-strict-aliasing'
>     ccversion='', gccversion='3.2.1',
gccosandvers='solaris2.9'
>     intsize=4, longsize=4, ptrsize=4, doublesize=8,
byteorder=4321
>     d_longlong=define, longlongsize=8,
d_longdbl=define, longdblsize=16
>     ivtype='long', ivsize=4, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=4
>     alignbytes=8, prototype=define
>   Linker and Libraries:
>     ld='gcc', ldflags =' -L/usr/local/lib'
>     libpth=/usr/local/lib /usr/lib /usr/ccs/lib
>     libs=-lsocket -lnsl -ldl -lm -lc
>     perllibs=-lsocket -lnsl -ldl -lm -lc
>     libc=, so=so, useshrplib=false, libperl=libperl.a
>     gnulibc_version=''
>   Dynamic Linking:
>     dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef,
ccdlflags=' '
>     cccdlflags='-fPIC', lddlflags='-G
-L/usr/local/lib'
>
> Locally applied patches:
>     
>
> ---
> INC for perl v5.8.0:
>     /usr/local/lib/perl5/5.8.0/sun4-solaris
>     /usr/local/lib/perl5/5.8.0
>     /usr/local/lib/perl5/site_perl/5.8.0/sun4-solaris
>     /usr/local/lib/perl5/site_perl/5.8.0
>     /usr/local/lib/perl5/site_perl
>     .
>
> ---
> Environment for perl v5.8.0:
>     HOME=/home/robert
>     LANG (unset)
>     LANGUAGE (unset)
>     LC_CTYPE=iso_8859_1
>     LD_LIBRARY_PATH (unset)
>     LOGDIR (unset)
>    
PATH=/home/robert/bin:/usr/local/bin:/home/robert/bin:/usr/l
ocal/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/l
ocal/sbin/:/usr/local/bin:/usr/bin:/usr/ccs/bin:/usr/ucb:/us
r/sbin:/opt/gnu/bin:/usr/local/ssl:/usr/local/ssl/bin:/usr/l
ocal/mysql/bin:/opt/SUNWppro/bin:/usr/sadm/bin:/usr/local/pe
rl:/usr/local/pim/bin:/usr/openwin/bin:/usr/local/sbin/:/usr
/local/bin:/usr/bin:/usr/ccs/bin:/usr/ucb:/usr/sbin:/opt/gnu
/bin:/usr/local/ssl:/usr/local/ssl/bin:/usr/local/mysql/bin:
/opt/SUNWppro/bin:/usr/sadm/bin:/usr/local/perl:/usr/local/p
im/bin:/usr/openwin/bin
>     PERL_BADLANG (unset)
>     SHELL=/usr/local/bin/bash
>
>
>   


-- 
Mark Mielke <markmielke.cc>