sh, checknig if file exists

[graudeejs]

How to check in sh if file/directory exists (using if)?
Couldn't find in net..

Also can someone suggest a Good sh tutorial... i came across few, but they are very basic

[vermaden]

if [ -f file ]; then
  echo "file exists"
fi

if [ -d dir ]; then
  echo "dir exists"
fi

[graudeejs]

Originally Posted by vermaden

if [ -f file ]; then
  echo "file exists"
fi

if [ -d dir ]; then
  echo "dir exists"
fi

I know already that.
and i can use else to do things i want if file doesn't exist...

if [ -d dir ]; then
  echo "dir exists"
else
  echo "dir doesn't exist"
fi

but is there a way to do it straight
cause i need action only if it doesn't exist (If doesn't exist, then do this and that)

[vermaden]

Originally Posted by killasmurf

I know already that.

O RLY?

So why do you ask:

Originally Posted by killasmurf

How to check in sh if file/directory exists (using if)?

if [ ! -f file ]; then
  echo "file does not exist"
fi

if [ ! -d dir ]; then
  echo "dir does not exist"
fi

even shorter:

[ ! -f file ] && echo "file does not exist"
[ ! -d dir ] && echo "dir does not exist"

Originally Posted by killasmurf

Also can someone suggest a Good sh tutorial... i came across few, but they are very basic

Here:
http://developer.apple.com/documenta...ShellScripting
http://developer.apple.com/documenta...lScripting.pdf
http://tldp.org/LDP/abs/html/

[graudeejs]

Originally Posted by vermaden

O RLY?

if [ ! -f file ]; then
  echo "file does not exist"
fi

if [ ! -d dir ]; then
  echo "dir does not exist"
fi

even shorter:

[ ! -f file ] && echo "file does not exist"
[ ! -d dir ] && echo "dir does not exist"

Here:
http://developer.apple.com/documenta...ShellScripting
http://developer.apple.com/documenta...lScripting.pdf
http://tldp.org/LDP/abs/html/

Thanks
I did tried -!f -f!, didn't thought about trying ! -f

[arch]

to just check if any file with whatever type exist use -e option in test then do what you have/want to do with the file

[vermaden]

@killasmurf
You are welcome.

[Carpetsmoker]

Also take a look at test(1).