Messages in this thread |  | | Date | Wed, 5 Sep 2001 09:38:51 -0400 | From | Michael Bacarella <> | Subject | Re: getpeereid() for Linux |
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> Would anyone like to give me a helping hand in implementing the > getpeereid() syscall for Linux? See the following page for the > documentation of the OpenBSD implementation: > > http://www.openbsd.org/cgi-bin/man.cgi?query=getpeereid&sektion=2&apropos=0&manpath=OpenBSD+Current > > I think I could work out the kernel data structures to gather the > relevant data from, however, I won't get all the locking stuff right. > > OTOH, is there any chance that the addition of such a syscall would be > accepted?
There's no need. The equivalent functionality can already be implemented in userspace.
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#include <sys/socket.h>
uid_t getpeereuid(int sd) { struct ucred cred; int len = sizeof (cred);
if (getsockopt(sd,SOL_SOCKET,SO_PEERCRED,&cred,&len)) return -1;
return cred.uid; }
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The same can be done for gid, and even pid.
Yes, Linux rules.
-- Michael Bacarella <mbac@nyct.net> Technical Staff / System Development, New York Connect.Net, Ltd. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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