Click here to get back home

strange problem with system() and backtick operator

 HomeNewsGroups | Search | About
 comp.lang.perl.misc    Post an article   get this group's latest topics as an RSS feed add this group's latest topics to your My MSN content add this group's latest topics to your My Yahoo content
Subject Author Date
strange problem with system() and backtick operator Martin Kissner 11-13-2005
Get Chitika Premium
Posted by Martin Kissner on November 13, 2005, 12:23 am
Please log in for more thread options
>>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,


> There
> is a rogue carriage return (0xd) in the string

> Is there something I can do to deal with this
> situation?


Repair the corrupted file:

perl -p -i -e 'tr/\r//d' bad_file


--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas

Posted by John W. Krahn on November 13, 2005, 12:14 am
Please log in for more thread options
>>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,


> There
> is a rogue carriage return (0xd) in the string

> Is there something I can do to deal with this
> situation?


Repair the corrupted file:

perl -p -i -e 'tr/\r//d' bad_file


--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas

Posted by Martin Kissner on November 14, 2005, 3:13 pm
Please log in for more thread options
>>
>> [snip]
>>
>> > if I print "$1\n",
>> > the file prints just fine. But, if I do something like print "$1 after
>> > \n", the whole output is messed up. If I print "before $1\n", nothing
>> > prints at all. If I print "before $1 after\n", only after prints.
>>
>> not really sure, but could be a rogue "\r" in $1,


> There
> is a rogue carriage return (0xd) in the string

> Is there something I can do to deal with this
> situation?


Repair the corrupted file:

perl -p -i -e 'tr/\r//d' bad_file


--
Tad McClellan SGML consulting
tadmc@augustmail.com Perl programming
Fort Worth, Texas

Similar ThreadsPosted
backtick and system command January 14, 2007, 3:56 pm
backtick and system return different exit codes December 25, 2005, 9:06 pm
How to use the "system" operator? March 6, 2007, 1:14 pm
system return value makes for strange logic October 29, 2004, 12:25 pm
Problem installing modules on redhat 9 - strange connection problem January 26, 2005, 5:19 am
Strange Problem February 17, 2005, 4:51 pm
Strange output problem September 26, 2006, 4:34 pm
Strange problem with IO::Socket::connected() March 28, 2006, 12:49 am
Strange HTTP Socket connexion problem October 16, 2005, 5:02 pm
Apache+Perl Net::SMTP Strange problem May 16, 2007, 2:07 am

Our other projects:

Art Dolls, Fairies and Mermaids - Sunnyfaces.net

Roy's Linux, Programming and Search Engines messages

1-Script XML SitemapXML Sitemap