Re: tmpnam usage warning

2006-12-29 Thread Colin Tuckley
Joey Hess wrote: > No, tmpnam generates a name for a file that did not exist at some point > in time, but that *will* exist in the worst possible state (eg, a > symlink to something important) when an attacker is targeting your program. Which is why I'm trying to find a way to get rid of the call

Re: tmpnam usage warning

2006-12-29 Thread Joey Hess
Colin Tuckley wrote: > tmpnam generates a name for a file which is guaranteed *not* to exist No, tmpnam generates a name for a file that did not exist at some point in time, but that *will* exist in the worst possible state (eg, a symlink to something important) when an attacker is targeting your

Re: tmpnam usage warning

2006-12-29 Thread Colin Tuckley
Steinar H. Gunderson wrote: > Why can't you just set up a pipe, fork, connect stdout of the child to one > end of the pipe, and exec the program? Thanks, reading about 'pipe' led me to 'popen' which pretty much automatically does what you suggest. regards, Colin -- Colin Tuckley | [EMAI

Re: tmpnam usage warning

2006-12-29 Thread Steinar H. Gunderson
On Fri, Dec 29, 2006 at 10:17:55AM +, Colin Tuckley wrote: > The interpreter allows the user to execute shell commands, this is > implemented using the "system" call. > > [...] > > What is the best solution to this problem? Why can't you just set up a pipe, fork, connect stdout of the child to