Date: Sun, 6 Feb 2005 21:33:22 -0800 From: "Ashwin Chandra" <ashcs@ucla.edu> To: <freebsd-hackers@freebsd.org> Subject: Opening files in Kernel Mode: help Message-ID: <002901c50cd6$89db4330$58e243a4@ash>
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So this is the code I got from help from you hackers out there and =
templates in the /kern library. This compiles but causes a kernel panic. =
I was wondering if any of you knew why this was happening and if I am =
calling all the virtual node functions correctly?
=20
***********************CODE BELOW************************
register struct proc *p;
struct nameidata nd;
int flags =3D FWRITE | O_CREAT;
struct ucred *uc;
static struct ucred *acctcred;
char data[1000];
acctcred =3D crhold(curthread->td_ucred);
uc =3D crhold(acctcred);
NDINIT(&nd, CREATE, FOLLOW, UIO_SYSSPACE, "/home/achandra/LOG", =
curthread);
vn_open(&nd, &flags, 0,-1);
NDFREE(&nd, NDF_ONLY_PNBUF);
vref(nd.ni_vp);
VOP_LEASE(nd.ni_vp, curthread, uc, LEASE_WRITE);
sprintf(data, "%s", "asdsada");
vn_rdwr(UIO_WRITE, nd.ni_vp, (caddr_t)data, strlen(data),
(off_t)0, UIO_SYSSPACE, IO_APPEND|IO_UNIT, uc, NOCRED,
(int *)0, curthread);
vrele(nd.ni_vp);
crfree(uc);
vn_close(nd.ni_vp, flags, curthread->td_ucred, curthread);
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