diff options
| author | Matthew Dillon <dillon@FreeBSD.org> | 2001-09-08 20:02:33 +0000 |
|---|---|---|
| committer | Matthew Dillon <dillon@FreeBSD.org> | 2001-09-08 20:02:33 +0000 |
| commit | 06ae1e91c46630214235d443b72925cc295a9bc1 (patch) | |
| tree | 5f36b4fb47a0f9f3d486afb708c5f95a6d1f5472 /sys/kern/kern_sig.c | |
| parent | 5002a60f9bc2499187cf64bc5ed603a3c157c459 (diff) | |
Notes
Diffstat (limited to 'sys/kern/kern_sig.c')
| -rw-r--r-- | sys/kern/kern_sig.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index c64af8f4a4c4..607c78c82578 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -68,6 +68,7 @@ #include <sys/sysent.h> #include <sys/sysctl.h> #include <sys/malloc.h> +#include <sys/unistd.h> #include <machine/cpu.h> @@ -1853,6 +1854,7 @@ coredump(p) { register struct vnode *vp; register struct ucred *cred = p->p_ucred; + struct flock lf; struct nameidata nd; struct vattr vattr; int error, error1, flags; @@ -1895,8 +1897,19 @@ restart: return (error); NDFREE(&nd, NDF_ONLY_PNBUF); vp = nd.ni_vp; + + VOP_UNLOCK(vp, 0, p); + lf.l_whence = SEEK_SET; + lf.l_start = 0; + lf.l_len = 0; + lf.l_type = F_WRLCK; + error = VOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &lf, F_FLOCK); + if (error) + goto out2; + if (vn_start_write(vp, &mp, V_NOWAIT) != 0) { - VOP_UNLOCK(vp, 0, p); + lf.l_type = F_UNLCK; + VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); if ((error = vn_close(vp, FWRITE, cred, p)) != 0) return (error); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) @@ -1908,7 +1921,7 @@ restart: if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred, p) || vattr.va_nlink != 1) { error = EFAULT; - goto out; + goto out1; } VATTR_NULL(&vattr); vattr.va_size = 0; @@ -1922,9 +1935,11 @@ restart: p->p_sysent->sv_coredump(p, vp, limit) : ENOSYS; -out: - VOP_UNLOCK(vp, 0, p); +out1: + lf.l_type = F_UNLCK; + VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); vn_finished_write(mp); +out2: error1 = vn_close(vp, FWRITE, cred, p); if (error == 0) error = error1; |