topic strace in Operating System - Linux

strace

Chakravarthi — Fri, 20 Aug 2004 06:27:51 GMT

as normal user when i run the following command
strace -o /tmp/a ping chakri

i get the following error message
strace: exec: Operation not permitted

any idea why this happens

regards
chakri

Re: strace

Huc_1 — Fri, 20 Aug 2004 07:49:30 GMT

ls -l /usr/ping gives
-rwsr-xr-x 1 root root 32908 Feb 17 2004 /bin/ping

notice the s
set user or group ID on execution

the following command works !

strace -o /tmp/a df
but ls -l /usr/df gives
-rwxr-xr-x 1 root root 33852 May 4 18:26 /bin/df

Jean-Pierre

Re: strace

Suresh Pai — Fri, 20 Aug 2004 14:17:30 GMT

The man page for strace gives you an explanation (and a possible solution). It is, as explained by the other user, a SETUID issue. The possible solution described in the man page is to install a special version of strace with mode 'rwsr-xr--', user root and group trace, where memers of the trace group are trusted users.