How to change file permission for all users in R

问题

When I use Sys.chmod(file,'777') it looks like the permission is changed only for the owner and not for all users, how can I do this ?

回答1:

Disable the umask check in Sys.chmod to get what you want:

Sys.chmod(file, "777", use_umask = FALSE)

Alternatively use system directly:

system('chmod 777 file')

来源：https://stackoverflow.com/questions/22025026/how-to-change-file-permission-for-all-users-in-r