Neither io nor lfs seem to have an option to check for this. I need to use this feature to simulate some code that does this check.
1
There are 1 best solutions below
Related Questions in LUA
- lua udp not working between computers
- Guitar Hero-like Timing Mechanic
- Call download lua script in app
- Erlang spawning large amounts of C processes
- does redis cluster support transactions ？
- I am writing an IVR using Lua and want to run xml script in between
- How to read a Bunch of files in a directory in lua
- How to pause a Lua script?
- lua 5.2.3 source lstring.c function luaS_resize
- Torch Lua: Why is my gradient descent not optimizing the error?
- How can I convert a character code to a string character in Lua?
- LuaInterface issue with vs 2015 RC project
- Storing Lua callback functions
- Compile Lua Code and store the bytecode in a new file
- Is there something wrong with my onRelease call?
Related Questions in LUAFILESYSTEM
- Keep Lua tmpfile after execute
- Trouble installing luasocket/lfs using luarocks
- Lua - require fallback / error handling
- Lua File System DLL Not Valid
- Deleting All Files from system.DocumentsDirectory in corona
- file are saving out of the folder, how to save within
- How to load Lua-Filesystem and Lua-Penlight in Luaj
- Error in Lua: attempt to use a closed file. when using io.close() after reading files
- How to check if a file is read only?
- Skipping current directory and previous directory using luafilesystem dir iterator
- LUA 5.2: Load/Require/etc - Limit it to specific directories that can be loaded
- under lua, how can I if check file attributes only if the LuaFileSystem package is installed
- Read file line by line into array
- lua array contains specific value for checking further
- How to compile LuaFileSystem library and get .dll file WITHOUT luarocks?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
It seems there's an undocumented
permissionsfield in the table returned bylfs.attributes(). Thanks to @siffiejoe for pointing this out, didn't see it when I read the code.Another approach is of course to try to read from the file, that will always work but might be slower.
You could also try opening the file and setting a (temporary, of course) read lock on it. Not sure about the portability of file locking in Lua, though.
Note: checking if a file is readable and then doing something can break due to race conditions; the permissions of a file can change between your check and the following action.