/data/data 没权限, 只能看 /data/data/com.termux 下的:
$ pwd
/data/data/com.termux/files/home
$ ls -l /data/data
ls: can't open '/data/data': Permission denied
total 0
$ ls -l /data/data/com.termux/
total 12
drwxrwx--x 2 u0_a104 u0_a104 4096 Jun 25 16:04 cache
drwx------ 4 u0_a104 u0_a104 4096 Jun 25 16:04 files
lrwxrwxrwx 1 install install 30 Jun 30 17:04 lib -> /data/app/com.termux-1/lib/arm
drwxrwx--x 2 u0_a104 u0_a104 4096 Jun 26 08:04 shared_prefs
$ ls -l /data/data/com.termux/files
total 8
drwx------ 9 u0_a104 u0_a104 4096 Jun 30 17:13 home
drwx------ 10 u0_a104 u0_a104 4096 Jun 25 23:16 usr
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