File.delete throws Errno:EACCESS Permission Denied in ruby -


the following code meant delete lines match regular expression fails

def delete_entry(name)     puts "deleting #{name}.." if $debug     begin       file.open("#{@file_name}.tmp", 'w') |out_file|         file.open(@file_name, 'r').each |line|           unless line =~ /^#{name},/             out_file.print line           else             puts "deleted #{line}!"           end         end       end       file.delete(@file_name)       file.rename("#{@file_name}.tmp", @file_name)     rescue exception       puts "exception thrown in phonebook::delete_entry(#{name}): #{$!}"     end   end

the temporary file works fine. corresponding entries deleted properly. when try delete old file, , rename tmp new file, file.delete throws following: (line 56 call file#delete)

exception `errno::eacces' @ phonebook.rb:56 - permission denied - file-io-sampl es/phonebooks/test.csv exception thrown in phonebook::delete_entry(mike): permission denied - file-io-s amples/phonebooks/test.csv

any appreciated. on windows 7 using ntfs filesystem if helps matters.

edit: per az's suggestion in comments added:

objectspace.each_object(file) { |f| p f if f.path == @file_name && !f.closed? }

just before call file.delete. output below:

c:\pickaxe>ruby phonebook.rb true enter phonebook! test.csv using test.csv.. open called! name: richard sex: male age: 22 name: midori sex: female age: 22 name: mike sex: male age:  18 name: richard sex: male age: 44 deleting mike.. deleted mike,male, 18 ! #<file:file-io-samples/phonebooks/test.csv> #<file:file-io-samples/phonebooks/test.csv> exception `errno::eacces' @ phonebook.rb:56 - permission denied - file-io-sampl es/phonebooks/test.csv exception thrown in phonebook::delete_entry(mike): permission denied - file-io-s amples/phonebooks/test.csv  c:\pickaxe>

the 2 lines prefixed # output of objectspace call.

i figured out stated last comment on original post. problem wasn't calling open block , therefore did not benefit automatic f.close comes using file.open block.

to remedy used file.open |file| file.each, instead of file.open(..).each

def delete_entry(name)     puts "deleting #{name}.." if $debug     begin       file.open("#{@file_name}.tmp", 'w') |out_file|         file.open(@file_name, 'r+') |file|           file.each |line|             unless line =~ /^#{name},/               out_file.print line             else               puts "deleted #{line}!"             end           end         end       end       objectspace.each_object(file) { |f| p f if f.path == @file_name && !f.closed? } if $debug       file.delete(@file_name)       file.rename("#{@file_name}.tmp", @file_name)     rescue exception       puts "exception thrown in phonebook::delete_entry(#{name}): #{$!}"     end   end

Comments

Post a Comment

Popular posts from this blog

.htaccess - First slash is removed after domain when entering a webpage in the browser -

sometimes when hit address of webpage in browser, removes first slash after domain. examples: www.mywebsite.com/scripts/script_6.php -> trying load www.mywebsite.comscripts/script_6.php www.mywebsite.com/test.php -> trying load www.mywebsite.comtest.php after entering again, loads page. a .htaccess settings must wrong: rewritebase / errordocument 404 http://www.mywebsite.com/oops.php errordocument 401 /notallowed.php rewriteengine on # turn on rewriting engine #gzip <ifmodule mod_deflate.c> addoutputfilterbytype deflate text/text text/html text/plain text/xml text/css application/x- javascript application/javascript </ifmodule> #end gzip rewritecond %{http_host} ^mywebsite\.com rewriterule ^(.*)$ http://www.mywebsite.com$1 [r=permanent,l] directoryindex index6.php rewriterule ^termsofuse/?$ termsofuse.php [nc,l] # handle requests "adpolicy" rewriterule ^privacy-policy/?$ privacy-policy.php [nc,l] # handle requ...
Read more

Automatically create pages in phpfox -

i have array of information of places , wanna use them create multiple pages in phpfox site. first tried manually insert data in phpfox database (in tables of phpfox_pages , phpfox_pages_text ). the page shown in site when opening it's link, site says: the page looking cannot found. do know other tables should manipulate make work? or know plugin phpfox same? thanks, solved ( @purefan guide): "pages" has user if take @ phpfox_user table, you'll found out how fetch new records on that. there 2 ambiguous fields in table ( password & password_salt ). can use script create values fields: <?php function generaterandomstring() { $length = 164; $characters = '-_0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz'; $randomstring = ''; ($i = 0; $i < $length; $i++) { $randomstring .= $characters[rand(0, strlen($characters) - 1)]; } return $randomstring; } $ssalt = '';...
Read more

c# - Farseer ContactListener is not working -

i'm using farseer in xna project, have trouble contactlistener. created class contactlistener these 2 error messages , don't know how fix problems. the type or namespace name 'contactlistener' not found (are missing using directive or assembly reference?) the type or namespace name 'contactimpulse' not found (are missing using directive or assembly reference?) what wrong contactlistener class? class mycontactlistener: contactlistener { void begincontact(contact contact) { /* handle begin event */ } void endcontact(contact contact) { /* handle end event */ } void presolve(contact contact, ref manifold oldmanifold) { fixture fixturea = contact.fixturea; fixture fixtureb = contact.fixtureb; if (fixtureb.collisioncategories == category.cat10) { contact.enabled = false; } } void postsolve(contact contact, ref contactimpulse impulse) { /* handle post-solve event */ } }...
Read more