Open fails when filename ends in " "

[p5pRT]

Migrated from rt.perl.org#58632 (status was 'rejected')

Searchable as RT58632$

[p5pRT]

From tag@tenet.res.in

Created by tag@tenet.res.in

This is a bug report for perl from tag@​tenet.res.in\, generated with the help of perlbug 1.35 running under perl v5.8.8.

----------------------------------------------------------------- open fails if the filename ends in space. See the example code below\, which fails to open the file "fff " which exists in the current directory. Verified on Debian Linux and Mac OS X 5.1. ---------------- #!/usr/bin/perl

opendir DIR\, "."; while ($f = readdir DIR)   {   print "readdir​: |$f| exists\n" if ($f =~ "^fff");   } closedir DIR;

$file = "fff ";

open CDFILE\, $file | die "Can not open |$file|\n"; ----------------   Regards   TAG -----------------------------------------------------------------   Timothy A. Gonsalves
Professor & Head Dept of Computer Science & Engg
Indian Institute of Technology
Madras - 600 036\, India
 
Phone​: +91-44-2257-4353/50 (o) -6353 (r) -4352 (fax) E-mail​: tag@​tenet.res.in Web​: http​://www.cse.iitm.ernet.in -----------------------------------------------------------------

Perl Info

``` Flags: category=core severity=medium Site configuration information for perl v5.8.8: Configured by Debian Project at Fri Apr 25 20:33:47 UTC 2008. Summary of my perl5 (revision 5 version 8 subversion 8) configuration: Platform: osname=linux, osvers=2.6.24.4, archname=i486-linux-gnu-thread-multi uname='linux ninsei 2.6.24.4 #1 smp preempt fri apr 18 15:36:09 pdt 2008 i686 gnulinux ' config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.8.8 -Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Uusesfio -Uusenm -Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des' 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='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64', optimize='-O2', cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include' ccversion='', gccversion='4.1.2 20061115 (prerelease) (Debian 4.1.1-21)', 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='cc', ldflags =' -L/usr/local/lib' libpth=/usr/local/lib /lib /usr/lib libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt perllibs=-ldl -lm -lpthread -lc -lcrypt libc=/lib/libc-2.3.6.so, so=so, useshrplib=true, libperl=libperl.so.5.8.8 gnulibc_version='2.3.6' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E' cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib' Locally applied patches: @INC for perl v5.8.8: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl . Environment for perl v5.8.8: HOME=/home/faculty/tag/ LANG=en_IN LANGUAGE (unset) LD_LIBRARY_PATH (unset) LOGDIR (unset) PATH=.:/home/faculty/tag//bin/i386:/home/faculty/tag//bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games PERL_BADLANG (unset) SHELL=/bin/csh ```

[p5pRT]

From @gbarr

On Sep 6\, 2008\, at 8​:18 AM\, tag@​tenet.res.in (via RT) wrote​:

----------------------------------------------------------------- open fails if the filename ends in space. See the example code below\, which fails to open the file "fff " which exists in the current
directory. Verified on Debian Linux and Mac OS X 5.1. ----------------

\

open CDFILE\, $file | die "Can not open |$file|\n";

That is as documented.

$ perldoc -f open

  The filename passed to 2−argument (or 1−argument) form of   open() will have leading and trailing whitespace deleted\, and   the normal redirection characters honored. This property\,   known as "magic open"\, can often be used to good effect. A   user could specify a filename of "rsh cat file ⎪"\, or you could   change certain filenames as needed​:

If you want whitespace at the start of end of a file honored then you need to use the 3-argument form of open

  open CDFILE\, '\<'\, $file or die "Can not open |$file|\n";perl

Graham.

[p5pRT]

The RT System itself - Status changed from 'new' to 'open'

[p5pRT]

@rgs - Status changed from 'open' to 'rejected'

[p5pRT]

From tag@tenet.res.in

Greetings​:

I found the solution (by using 3 args to open()) to my problem in the perlfunc man page. This bug report may be closed as not-a-bug.

  Regards   TAG