Here is a related question. When I fork() from a process a parent process with some id is created together with a child process with pid same a id of parent and id (of child) is zero. Now if from a child I fork() again then what will be the pid and id of the child (or grand child) now. Both cannot be zero again and what happens if I fork again from the grand child? Pl. clear my doubt Cheers ashok --- Gopala Krishna <gopalakrishna.n.m@xxxxxxxxx> wrote: > > > > Fortunately, here comes the proc filesystem ! > > So, you have the pid of the father process : look > at the file > > /proc/'ppid'/status there should be a fild ppid : > you have the pid of > > your grand parent. > > You can do a recursive function to find all the > ancestors of your > > process. > > This solution is quite annoying since you have to > handle files, but it > > works. > > > > If this solution is not acceptable for you, you > can look at the pstree > > source code. > > > > I don't know if you wanted to do that in your own > programm or just > > wanted some soft to give you the entire tree (like > pstree). Anyway... : > > > > In My case, I knew only pid of the first process. I > want the top down > approach rather than the bottom up (i.e if I know > child, I know parent. but, > my requirement is to find out child and it's grand > children, If I know the > parent pid). Currently I am going through pstree > code. > > Thanks and regards, > Gopal. > ___________________________________________________________ Win tickets to the 2006 FIFA World Cup Germany with Yahoo! Messenger. http://advision.webevents.yahoo.com/fifaworldcup_uk/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
