"ps -e" without procfs(5)

Mikolaj Golub trociny at freebsd.org
Sun Oct 16 17:27:30 UTC 2011


I have a patch that makes kvm_uread() read from user space using ptrace(2).


With this change 'ps -e' does not requires procfs(5).

Do you like it or there might be some reasons why it is a bad idea?

Grepping sources it looks like currently only ps uses kvm_getenvv(3) (and thus

Note, when reading from its own user space it just does bcopy(3), so if a
wrong address range is passed to kvm_uread() the program will segfault. Do we
need some protection here and what? Masking SIGSEGV?

Mikolaj Golub

More information about the freebsd-hackers mailing list