different behaviour on fbsd and linux
gurney_j at resnet.uoregon.edu
Sat Feb 18 13:43:34 PST 2006
Divacky Roman wrote this message on Sat, Feb 18, 2006 at 18:39 +0100:
> On Sat, Feb 18, 2006 at 06:21:52PM +0100, joerg at britannica.bec.de wrote:
> > On Sat, Feb 18, 2006 at 06:17:18PM +0100, Divacky Roman wrote:
> > > execl("/bin/ls", NULL);
> > This is wrong. You must specify arg0 != NULL (POSIX says so) and you
> > must NULL-terminate the *following* list.
> > E.g.:
> > execl("/bin/ls", "/bin/ls", NULL);
> > is what you want to do.
> ah.. thnx.. the man page should be updated with "he
> first argument, by convention, should point to the file name associated
> with the file being executed."
> s/should/must then
Nope.. it need not be the same.. in cases like this:
execl("/usr/bin/gzip", "gunzip", NULL);
will give you gunzip behavior because the gzip binary looks at argv
and changes it's behavior based upon what it finds.. look at crunchgen
for the ability to combine different programs into one binary...
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
More information about the freebsd-hackers