Well, I noticed your second question. ;-) The common method to determine a executable file is stat:perms, you may check it out in the manual for details.
On Wed, Nov 23, 2011 at 1:47 PM, Nala Ginrut <nalagin...@gmail.com> wrote: > I think there's a bug. > (execlp "ls" "") will access. > Since the second parameter is optional, scm_execlp doesn't handle > exec_argv unbounded situation. > > > On Wed, Nov 23, 2011 at 12:06 AM, Paul Emsley > <paul.ems...@bioch.ox.ac.uk>wrote: > >> >> Hi, >> >> I am trying to see if there is a way to determine if a program is in the >> path (i.e. a bit like "which"), returning a #t or #f answer. I was looking >> execl and execlp. >> >> The documentation for execl says: >> >> > Executes the file named by path as a new process image >> >> what is path ? I'm guessing that that should be "filename". >> >> While playing around, I notice that >> >> (execlp "ls") >> >> produces a core dump. >> >> My question is then, *is* there a way to determine if a string is >> executable? (And if so, how? :-) >> >> Thanks, >> >> Paul. >> >> >> >> >> >
