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use vnode_to_path.

This commit is contained in:
christos 2007-12-15 23:52:00 +00:00
parent fca36f8a1a
commit 177940c72e
1 changed files with 4 additions and 57 deletions
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61
sys/miscfs/procfs/procfs_map.c
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@ -1,4 +1,4 @@
/* $NetBSD: procfs_map.c,v 1.33 2007/11/26 19:02:16 pooka Exp $ */
/* $NetBSD: procfs_map.c,v 1.34 2007/12/15 23:52:00 christos Exp $ */
/*
* Copyright (c) 1993
@ -76,7 +76,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: procfs_map.c,v 1.33 2007/11/26 19:02:16 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: procfs_map.c,v 1.34 2007/12/15 23:52:00 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -93,9 +93,6 @@ __KERNEL_RCSID(0, "$NetBSD: procfs_map.c,v 1.33 2007/11/26 19:02:16 pooka Exp $"
#define BUFFERSIZE (64 * 1024)
static int procfs_vnode_to_path(struct vnode *vp, char *path, int len,
struct lwp *curl, struct proc *p);
/*
* The map entries can *almost* be read with programs like cat. However,
* large maps need special programs to read. It is not easy to implement
@ -166,8 +163,8 @@ procfs_domap(struct lwp *curl, struct proc *p, struct pfsnode *pfs,
if (error == 0 && vp != pfs->pfs_vnode) {
fileid = va.va_fileid;
dev = va.va_fsid;
error = procfs_vnode_to_path(vp, path,
MAXPATHLEN * 4, curl, p);
error = vnode_to_path(path,
MAXPATHLEN * 4, vp, curl, p);
}
}
pos += snprintf(buffer + pos, BUFFERSIZE - pos,
@ -218,53 +215,3 @@ procfs_validmap(struct lwp *l, struct mount *mp)
{
return ((l->l_flag & LW_SYSTEM) == 0);
}
/*
* Try to find a pathname for a vnode. Since there is no mapping
* vnode -> parent directory, this needs the NAMECACHE_ENTER_REVERSE
* option to work (to make cache_revlookup succeed).
*/
static int procfs_vnode_to_path(struct vnode *vp, char *path, int len,
struct lwp *curl, struct proc *p)
{
struct proc *curp = curl->l_proc;
int error, lenused, elen;
char *bp, *bend;
struct vnode *dvp;
bp = bend = &path[len];
*(--bp) = '\0';
error = vget(vp, LK_EXCLUSIVE | LK_RETRY);
if (error != 0)
return error;
error = cache_revlookup(vp, &dvp, &bp, path);
vput(vp);
if (error != 0)
return (error == -1 ? ENOENT : error);
error = vget(dvp, 0);
if (error != 0)
return error;
*(--bp) = '/';
/* XXX GETCWD_CHECK_ACCESS == 0x0001 */
error = getcwd_common(dvp, NULL, &bp, path, len / 2, 1, curl);
/*
* Strip off emulation path for emulated processes looking at
* the maps file of a process of the same emulation. (Won't
* work if /emul/xxx is a symlink..)
*/
if (curp->p_emul == p->p_emul && curp->p_emul->e_path != NULL) {
elen = strlen(curp->p_emul->e_path);
if (!strncmp(bp, curp->p_emul->e_path, elen))
bp = &bp[elen];
}
lenused = bend - bp;
memcpy(path, bp, lenused);
path[lenused] = 0;
return 0;
}