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accidental list context in perlfaq9 #653

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p5pRT opened this issue Sep 21, 1999 · 2 comments
Closed

accidental list context in perlfaq9 #653

p5pRT opened this issue Sep 21, 1999 · 2 comments

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@p5pRT
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@p5pRT p5pRT commented Sep 21, 1999

Migrated from rt.perl.org#1529 (status was 'resolved')

Searchable as RT1529$

@p5pRT
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@p5pRT p5pRT commented Sep 21, 1999

From kragen@dnaco.net

I just posted this to clpmod.

perlfaq9 says​:
  use Sys​::Hostname;
  $address = sprintf('%s@​%s', getpwuid($<), hostname);

getpwuid gets a list context, so sprintf gets many more arguments than
it should; the result is something like 'kragen@​x' or
'kragen@​##kragen' on systems with shadowed passwords.

"scalar getpwuid($<)" or "(getpwuid($<))[0]" would work.

Perl Info


Site configuration information for perl 5.00503:

Configured by dryan at Mon May 17 23:37:31 EDT 1999.

Summary of my perl5 (5.0 patchlevel 5 subversion 3) configuration:
  Platform:
    osname=solaris, osvers=2.6, archname=sun4-solaris
    uname='sunos shadow 5.6 generic sun4m sparc sunw,sparcstation-20 '
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef useperlio=undef d_sfio=undef
  Compiler:
    cc='gcc', optimize='-O', gccversion=2.8.1
    cppflags='-I/usr/local/include'
    ccflags ='-I/usr/local/include'
    stdchar='unsigned char', d_stdstdio=define, usevfork=false
    intsize=4, longsize=4, ptrsize=4, doublesize=8
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    alignbytes=8, usemymalloc=y, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib /usr/ccs/lib
    libs=-lsocket -lnsl -lgdbm -ldl -lm -lc -lcrypt
    libc=/lib/libc.so, so=so, useshrplib=false, libperl=libperl.a
  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 5.00503:
    /usr/local/lib/perl5/5.00503/sun4-solaris
    /usr/local/lib/perl5/5.00503
    /usr/local/lib/perl5/site_perl/5.005/sun4-solaris
    /usr/local/lib/perl5/site_perl/5.005
    .


Environment for perl 5.00503:
    HOME=/home/kragen
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/kragen/bin:/usr/ucb:/bin:/usr/bin:/usr/local:/usr/hosts:/usr/bin/X11:/usr/local/bin:.
    PERL_BADLANG (unset)
    SHELL=/bin/csh

@p5pRT
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@p5pRT p5pRT commented Sep 21, 1999

From @jhi

Kragen Sitaker writes​:

This is a bug report for perl from kragen@​pobox.com,
generated with the help of perlbug 1.26 running under perl 5.00503.

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

I just posted this to clpmod.

perlfaq9 says​:
use Sys​::Hostname;
$address = sprintf('%s@​%s', getpwuid($<), hostname);

getpwuid gets a list context, so sprintf gets many more arguments than
it should; the result is something like 'kragen@​x' or
'kragen@​##kragen' on systems with shadowed passwords.

"scalar getpwuid($<)" or "(getpwuid($<))[0]" would work.

Thanks!

--
$jhi++; # http​://www.iki.fi/jhi/
  # There is this special biologist word we use for 'stable'.
  # It is 'dead'. -- Jack Cohen

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