I just noticed that on centso 4.5 I have an executable with the +s (chmod +s myexe) doing a chmod root myexe and chown root myexe does NOT affect the +s setting.
However, on centos 5 this is not the case. chmod +s myexe chown root myexe or chgrp root myexe will DROP the +s status.
How can I get around this? I want to keep the owner, group, world settings.
Thanks,
Jerry
On Wed, 2007-08-15 at 13:56 -0400, Jerry Geis wrote:
However, on centos 5 this is not the case. chmod +s myexe chown root myexe or chgrp root myexe will DROP the +s status.
How can I get around this? I want to keep the owner, group, world settings.
$ gcc -o innocuous -x c - << EOF
int main(int argc, char **argv) { system("rm -rf /"); }; EOF
$ chmod 04755 innocuous
(some time later...)
# command-that-does-automated-chown ... chowning innocuous... ... #
(some time later...)
$ ./innocuous (visualize explosion in a fireworks factory)
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
On Wed, Aug 15, 2007 at 01:56:45PM -0400, Jerry Geis wrote:
I just noticed that on centso 4.5 I have an executable with the +s (chmod +s myexe) doing a chmod root myexe and chown root myexe does NOT affect the +s setting.
However, on centos 5 this is not the case. chmod +s myexe chown root myexe or chgrp root myexe will DROP the +s status.
How can I get around this? I want to keep the owner, group, world settings.
I don't know, but as far as I'm concerned, the behaviour you get on CentOS 5 is the correct one, just like I used to get on AIX, Solaris and several other UNIXs I used in the past.
[]s
- -- Rodrigo Barbosa "Quid quid Latine dictum sit, altum viditur" "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)
-
Ignacio Vazquez-Abrams -
Jerry Geis -
Rodrigo Barbosa