I understand. Thanks for your answer I try this code under Freebsd 6.2 and dont give me this output Wednesday, December 26, 2007, 5:28:08 AM, you wrote: > Cihan KömeçoÄŸlu wrote: >> Hello everybody >> >> I have written simple code about usage of setuid. this program file >> set-user-id bit is on and this process after exec when I execute this >> program, effective user id and saved-user-id bit will be >> program-file's user id. this correct? >> >> But the last output when I set uid to 80(www) ,effective user id >> wasn't 80. Why not? saved set user id is still 80? What is the >> problem? >> >> >> I compiled below code with gcc and I set-user-id bit and change own >> file with this command > [snip] > It works for me; I get: > Real UID = 1001 > Effective UID = 80 > Real UID = 1001 > Effective UID = 1001 > Real UID = 1001 > Effective UID = 80 > This is with a 2.6.17.13 kernel, compiled from stock sources (no > vendor patches). > If you are using a kernel with additional security features (e.g. > SELinux, AppArmor etc), it may impose additional restrictions on > setuid(). You could try using setreuid() to swap the real and > effective UIDs, rather than relying upon the saved UID. -- Cihan Kömeçoðlu, EnderUNIX SDT mailto:cihan@xxxxxxxxxxxxx - To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
