Mohammad_AlSaleh <ce.mohammad.alsa...@gmail.com> on Tue, 2014/12/30 14:36: > Hello. > > I just came across some weird behavior. > > A small testcase: > > cd /tmp # should be tmpfs > touch tfile > ln -s tfile tlink > cat tlink > > When cat executes, it returns with success(0). But, if cat is executed > as root, it fails with a permission denied error. > > What's really happening is, the open() syscall fails with EACCESS when > the file is a symlink in a tmpfs-mounted dir. But only fails when run > as root! > > I'm assuming this is a bug. Can anyone confirm it?
This is expected as /tmp has the sticky bit set. https://wiki.ubuntu.com/Security/Features#Symlink_restrictions -- main(a){char*c=/* Schoene Gruesse */"B?IJj;MEH" "CX:;",b;for(a/* Chris get my mail address: */=0;b=c[a++];) putchar(b-1/(/* gcc -o sig sig.c && ./sig */b/42*2-3)*42);}
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