On 14.04.19 22:14, Christian Brauner wrote: Hi, > When clone is called with CLONE_PIDFD a pidfd instead of a pid will be > returned. Uh, changing the return type by some flags produces a very strange feeling in my stomach. Isn't there any other way for fetching a pidfs for some pid ? > To make it possible for users of CLONE_PIDFD to apply standard > error checking that is common all across userspace, file descriptor > numbering for pidfds starts at 1 and not 0. Feels even more strange. I'm used to the kernel always picking the lowest available pid. In some cases, one really wants to have fd 0. Even though the actual usecases for doing that w/ a pidfd might be pretty limited, I don't feel good w/ breaking this old habit. --mtx -- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@xxxxxxxxx -- +49-151-27565287
