列出我可以阅读的文件

Question

I would like to list any files that can be read by my current user in bash. I'm not sure what would be the best way to check for that. I'm thinking something along the lines of ls -l | grep <myusername>|<mygroupname> ls -l | grep <myusername>|<mygroupname> or find . , but that doesn't deal with the other permissions.

Also, I'm working on NetBSD box.

Answer 1

Considering the 2 files below, where one can be read by user, and the other can't:

[fsilveir@fsilveir tmp]$ ls -l ./test_dir/can_read.txt ./test_dir/cant_read.txt
-rw-r--r--. 1 root root 861784 May 29 20:34 ./test_dir/can_read.txt
-rwx------. 1 root root      0 May 29 20:30 ./test_dir/cant_read.txt

You can use find with -perm option. By using +r you'll list the files you can read, and using -r for finding the ones you can't read, as shown below:

[fsilveir@fsilveir tmp]$ find . -name "*.txt" -perm -g+r 2>/dev/null
./test_dir/can_read.txt
[fsilveir@fsilveir tmp]$ 

Another approach is using find with -readable option, as shown below:

[fsilveir@fsilveir tmp]$ find . -name "*.txt" -readable
./test_dir/can_read.txt

[fsilveir@fsilveir tmp]$ find . -name "*.txt" ! -readable
./test_dir/cant_read.txt