Date: Sat, 18 Feb 2006 14:13:15 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: stefan@fafoe.narf.at Cc: freebsd-hackers@freebsd.org, joerg@britannica.bec.de Subject: Re: different behaviour on fbsd and linux Message-ID: <20060218.141315.100064292.imp@bsdimp.com> In-Reply-To: <20060218174216.GC578@wombat.fafoe.narf.at> References: <20060218171718.GA73133@stud.fit.vutbr.cz> <20060218172152.GB11874@britannica.bec.de> <20060218174216.GC578@wombat.fafoe.narf.at>
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In message: <20060218174216.GC578@wombat.fafoe.narf.at>
Stefan Farfeleder <stefan@fafoe.narf.at> writes:
: On Sat, Feb 18, 2006 at 06:21:52PM +0100, joerg@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.
:
: execl("/bin/ls", "/bin/ls", (char *)NULL); as NULL might expand to an
: integer 0.
This is one of the times that the difference is important, since
this function is a varadic one, and you must always cast when passing
through varadic args.
Warner
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