How do I test whether or not a file is writable?

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Re: How do I test whether or not a file is writable? by chromatic (Archbishop) on Apr 20, 2000 at 22:05 UTC
The -w test will do: `if (-w FILEHANDLE) { print "It's writeable by my effective uid or gid!\n"; }` [download] For more information, see -X (or perldoc -f -X).	[reply] [d/l]
Re: How do I test whether or not a file is writable? by kiruthika.bkite (Scribe) on Mar 18, 2010 at 10:56 UTC
`if(-f $name ) { if(!(-w $name)) { print "File '$name' doesn't have write permission\n"; } }` [download] -f switch is used to check whether $name is file or not. -w switch is used to test whether file has write permission or not.	[reply] [d/l]
Re: Answer: How do I test whether or not a file is writable? by JavaFan (Canon) on Mar 18, 2010 at 14:34 UTC
There's no point testing for both `-f` and `-w`. If the file doesn't exists (or if its existence cannot be determined), `-w` will return false. And if `-w` returns true, the file exists.	[reply] [d/l] [select]
Re^2: Answer: How do I test whether or not a file is writable? by clinton (Priest) on Mar 18, 2010 at 16:41 UTC
Yes, but `-w` would also return true if the file is actually a writeable directory	[reply] [d/l]
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