Active Oldest Votes. Improve this answer. This solution is beautifully simple. Gilles 'SO- stop being evil' Gilles 'SO- stop being evil' k gold badges silver badges bronze badges. Consider Maciej's example of. A better heuristic would be to consider the string after the last. NoamM What was wrong with the indentation? It's definitely broken after your edit: doubly-nested code is indented the same as singly-nested.
Chris Chris 7, 5 5 gold badges 21 21 silver badges 18 18 bronze badges. Well a. Grzegorz Wierzowiecki Grzegorz Wierzowiecki Maciej Piechotka Maciej Piechotka Does not work for all cases. Try with 'foo. Gilles: i just think there's not a solution unless you use a precomputed list of known extensions, because an extension can be anything. Naturally this method doesn't work for. However that could be handled in a two step process. If the extension is gz then check again to see if there is also a tar extension.
How to extract the filename and extension in fish :. Caveats: Splits on the last dot, which works well for filenames with dots in them, but not well for extensions with dots in them. See example below. If there's a limited set of extensions you'll be dealing with and you know all of them, try this:.
This does not have the caveat as the first example, but you do have to handle every case so it could be more tedious depending on how many extensions you can expect. Here is code with AWK. It can be done more simply. But I am not good in AWK. This can also be used in string interpolation as well, but unfortunately you have to set base beforehand. Building from Petesh answer, if only the filename is needed, both path and extension can be stripped in a single line,.
I wrapped it all up in a little, slightly more comprehensible, reusable function for my or your. So for the case detailed here, you could simply do this:. More generally, if you wanted to remove the last occurrence of. The link the above answer appears to be dead. Here's a great explanation of a bunch of the string manipulation you can do directly in Bash, from TLDP. If you also want to allow empty extensions, this is the shortest I could come up with:.
IMHO the best solution has already been given using shell parameter expansion and are the best rated one at this time. I however add this one which just use dumbs commands, which is not efficient and which noone serious should use ever :. Here is the algorithm I used for finding the name and extension of a file when I wrote a Bash script to make names unique when names conflicted with respect to casing.
How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Extract filename and extension in Bash Ask Question. Asked 12 years, 7 months ago. Active 2 years ago. Viewed 1. I want to get the filename without extension and the extension separately.
Any better ideas? Benjamin W. This question explains this bash technique and several other related ones. This is clearly a non-trivial problem and for me it is hard to tell if the answers below are completely correct.
It's amazing this is not a built in operation in ba sh answers seem to implement the function using pattern matching. I decided to use Python's os. As extension have to represent nature of a file, there is a magic command which check file to divine his nature and offert standard extension. The question is problematic in the first place because.. From the perspective of the OS and unix file-systems in general, there is no such thing as a file extension.
Using a ". For example, with the 'tar' program, it could have been decided to name output files with a "tar. There is no "general, always works" solution because of this--you have to write code that matches your specific needs and expected filenames. Show 2 more comments. Active Oldest Votes. Ludovic Kuty 4, 3 3 gold badges 26 26 silver badges 40 40 bronze badges.
Petesh Petesh Check out gnu. This "solution" does not work if the file does not have an extension -- instead, the whole file name is output, which is quite bad considering that files without extensions are omnipresent. During for loop, we may need to exit for given conditions if they occur. In this example, we will check and if the current value of c can be divided into 6 we will end the loop.
In some cases, we may need to skip the current iteration but resume to the loop. We can use continue keyword which will step over to the next iteration. Loop Over Given File Names. Loop Over Listed File Names.
Loop Over Specified File Extensions. C Like For Loop. Infinite Loop. Skip To Next Step with continue. Filename without extension needs to convert the file from one extension to another. This example shows that how you can change the extension of all text files.
Shell parameter expansion is another way to read the filename without extension in bash. This example shows the uses of shell parameter expansion. The following command will print the filename only from the path. If the filename contains two extensions with two dot.
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