On Wed, May 24, 2017 at 04:27:06PM -0400, Choose a display name wrote: > I don't quite understand the description of the PPID in the sh manual. > > >PPID The shell's parent process ID. Subshells have the same > > PPID as the parent of the current shell. > > PPID is the shell's parent's pid, okay (by the way, shouldn't the > second "'s" be added?). But, according to the next sentence, subshells > have the same value in their PPIDs as the current shell's parent have > in its PPID. Is it correct?
Yes, http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18 > > Also, I had a problem understanding how does cd work. It is stated > there that when cd is called with argument not starting with a slash > or dot then CDPATH is searched, but what if the variable is unset? It > says nothing about such case. > > >cd [-L | -P] [dir] > >Change the current working directory to dir, or $HOME by default. If > >dir is set to `-', change to the previous working directory and print > >the (now current) working directory. If dir does not begin with a > >slash or dot, CDPATH is searched for the directory. > > ksh manual says that the current directory is searched in such case. > Does sh's cd work the same way? If so, it might be good idea to include > that to the manual. > > Thank you. yes, should be the same, see the cd coomand, -Otto
