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Test the value of vvarraycounter before opening the file. If the files of interest are arguments to a script, in that script use ( explanation). So, my question is, will this create an empty file/zero byte file in the server Assuming vfilehandle points to a valid UTLFILE handle opened earlier in your code, yes, an empty file is already created at this point. Alternatively, if /usr/bin/sh users specify /usr/ucb before /usr/bin in their PATH environment variable, then test will return true. f file True if file exists and is a regular file. If you do care about the exact format, you should probably use some combination of `wc -c <"$file"` (which will not print the filename) and echo or echo -n (which will print whatever you'd like). You can man test instead of if -s file True if file exists and has a size greater than zero. The quotes ( "$file") are necessary if any of the files have spaces or tabs in them (e.g., a file named my stuff.txt). r tests that the file is readable, i.e., that wc has a chance of succeeding if you're looking at huge files or files that you can't read, use stat as per your original version and Stéphane's answer. f tests to see if what you're looking at is an ordinary file (not a directory, device, pipe, socket, tty, or generally some weird thing that can't be said to have a size in bytes). ( source)Īlso, below, consider using $(wc -c <"$file") instead of `wc -c <"$file"`). If you're writing this with bash or ksh, you're probably better off using (( )) or ] instead of. I like shell scripting a lot, but one disadvantage of it is that the shell cannot help you when you misspell, whereas a compiler like. Where I am hazy, would be where you had 15,000 names in the directory at one time, but then deleted them all. rm -f empty.txt touch full.txt else The file is empty. So for 24-byte file names, it reads the first 400+ directory slots, which might be ten directory blocks. If you also don't care too much about errors and corner cases (in which case, good luck to you): $ for file in * do wc -c $file done Check your spelling of empty, but then also try this: /bin/bash -e if -s diff.txt then The file is not-empty. This will create a new empty file, if one does not exist. One of the easiest and quickest way to empty a file is to use I/O redirection. bash truncate -s 0 myfile.txt-s or size: specifies the size to which the file needs to be truncated, in bytes. Here's a simple way to do this that should work with the Bourne shell and its descendants (including bash and ksh), if you don't care too much about the exact output format: $ for file in * do if & then wc -c "$file" fi done We will use the size 0 (zero) to empty the file.