diff options
Diffstat (limited to 'sys/kern/kern_exec.c')
| -rw-r--r-- | sys/kern/kern_exec.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c index 098edd5049e..47d7e22691e 100644 --- a/sys/kern/kern_exec.c +++ b/sys/kern/kern_exec.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_exec.c,v 1.43 2000/09/26 14:01:39 art Exp $ */ +/* $OpenBSD: kern_exec.c,v 1.44 2000/09/28 13:41:39 art Exp $ */ /* $NetBSD: kern_exec.c,v 1.75 1996/02/09 18:59:28 christos Exp $ */ /*- @@ -51,6 +51,7 @@ #include <sys/mman.h> #include <sys/signalvar.h> #include <sys/stat.h> +#include <sys/conf.h> #ifdef SYSVSHM #include <sys/shm.h> #endif @@ -535,26 +536,38 @@ sys_execve(p, v, retval) * allocated. We do not want userland to accidentally * allocate descriptors in this range which has implied * meaning to libc. + * + * XXX - Shouldn't the exec fail if we can't allocate + * resources here? */ if (fp == NULL) { short flags = FREAD | (i == 0 ? 0 : FWRITE); - struct nameidata nd; + struct vnode *vp; int indx; if ((error = falloc(p, &fp, &indx)) != 0) - continue; - NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, - "/dev/null", p); - if ((error = vn_open(&nd, flags, 0)) != 0) { + break; +#ifdef DIAGNOSTIC + if (indx != i) + panic("sys_execve: falloc indx != i"); +#endif + if ((error = cdevvp(getnulldev(), &vp)) != 0) { + ffree(fp); + fdremove(p->p_fd, indx); + break; + } + if ((error = VOP_OPEN(vp, flags, p->p_ucred, p)) != 0) { ffree(fp); fdremove(p->p_fd, indx); + vrele(vp); break; } + if (flags & FWRITE) + vp->v_writecount++; fp->f_flag = flags; fp->f_type = DTYPE_VNODE; fp->f_ops = &vnops; - fp->f_data = (caddr_t)nd.ni_vp; - VOP_UNLOCK(nd.ni_vp, 0, p); + fp->f_data = (caddr_t)vp; } } } else |