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/*
* dmnt.c -- Darwin mount support functions for libproc-based lsof
*/
/*
* Portions Copyright 2005 Apple Computer, Inc. All rights reserved.
*
* Copyright 2005 Purdue Research Foundation, West Lafayette, Indiana
* 47907. All rights reserved.
*
* Written by Allan Nathanson, Apple Computer, Inc., and Victor A.
* Abell, Purdue University.
*
* This software is not subject to any license of the American Telephone
* and Telegraph Company or the Regents of the University of California.
*
* Permission is granted to anyone to use this software for any purpose on
* any computer system, and to alter it and redistribute it freely, subject
* to the following restrictions:
*
* 1. Neither the authors, nor Apple Computer, Inc. nor Purdue University
* are responsible for any consequences of the use of this software.
*
* 2. The origin of this software must not be misrepresented, either
* by explicit claim or by omission. Credit to the authors, Apple
* Computer, Inc. and Purdue University must appear in documentation
* and sources.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 4. This notice may not be removed or altered.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright 2005 Apple Computer, Inc. and Purdue Research Foundation.\nAll rights reserved.\n";
static char *rcsid = "$Id: dmnt.c,v 1.6 2012/04/10 16:41:04 abe Exp $";
#endif
#include "lsof.h"
/*
* Local static information
*/
static struct mounts *Lmi = (struct mounts *)NULL; /* local mount info */
static int Lmist = 0; /* Lmi status */
/*
* readmnt() -- read mount table
*/
struct mounts *
readmnt()
{
#if defined(DIR_MNTSTATUS_TRIGGER)
struct {
uint32_t length;
uint32_t mount_flags;
} ab;
struct attrlist al;
#endif /* defined(DIR_MNTSTATUS_TRIGGER) */
char *dn = (char *)NULL;
char *ln;
struct statfs *mb = (struct statfs *)NULL;
struct mounts *mtp;
int n;
struct stat sb;
if (Lmi || Lmist)
return(Lmi);
/*
* Access mount information.
*/
if ((n = getmntinfo(&mb, MNT_NOWAIT)) <= 0) {
(void) fprintf(stderr, "%s: no mount information\n", Pn);
return(0);
}
/*
* Read mount information.
*/
for (; n; n--, mb++) {
if (!mb->f_type)
continue;
/*
* Avoid file systems that are not appropriate paths to
* user data (e.g. automount maps, triggers).
*/
#if defined(DIR_MNTSTATUS_TRIGGER)
(void) bzero((char *)&al, sizeof(al));
al.bitmapcount = ATTR_BIT_MAP_COUNT;
al.dirattr = ATTR_DIR_MOUNTSTATUS;
if (getattrlist(mb->f_mntonname, &al, &ab, sizeof(ab), 0) == 0) {
if (ab.mount_flags & DIR_MNTSTATUS_TRIGGER)
continue; // if mount trigger
}
#else /* !defined(DIR_MNTSTATUS_TRIGGER) */
if (mb->f_flags & MNT_AUTOMOUNTED) {
if (!strncmp(mb->f_mntfromname, "map ", 4)
|| !strcmp(mb->f_mntfromname, "trigger"))
continue;
}
#endif /* defined(DIR_MNTSTATUS_TRIGGER) */
/*
* Interpolate a possible symbolic directory link.
*/
if (dn)
(void) free((FREE_P *)dn);
if (!(dn = mkstrcpy(mb->f_mntonname, (MALLOC_S *)NULL))) {
no_space_for_mount:
(void) fprintf(stderr, "%s: no space for mount at ", Pn);
safestrprt(mb->f_mntonname, stderr, 0);
(void) fprintf(stderr, " (");
safestrprt(mb->f_mntfromname, stderr, 0);
(void) fprintf(stderr, ")\n");
Exit(1);
}
if (!(ln = Readlink(dn))) {
if (!Fwarn) {
(void) fprintf(stderr,
" Output information may be incomplete.\n");
}
continue;
}
if (ln != dn) {
(void) free((FREE_P *)dn);
dn = ln;
}
if (*dn != '/')
continue;
/*
* Stat() the directory.
*/
if (statsafely(dn, &sb)) {
if (!Fwarn) {
(void) fprintf(stderr, "%s: WARNING: can't stat() ", Pn);
safestrprt(mb->f_fstypename, stderr, 0);
(void) fprintf(stderr, " file system ");
safestrprt(mb->f_mntonname, stderr, 1);
(void) fprintf(stderr,
" Output information may be incomplete.\n");
}
(void) bzero((char *)&sb, sizeof(sb));
sb.st_dev = (dev_t)mb->f_fsid.val[0];
sb.st_mode = S_IFDIR | 0777;
if (!Fwarn) {
(void) fprintf(stderr,
" assuming \"dev=%x\" from mount table\n",
sb.st_dev);
}
}
/*
* Allocate and fill a local mount structure.
*/
if (!(mtp = (struct mounts *)malloc(sizeof(struct mounts))))
goto no_space_for_mount;
mtp->dir = dn;
dn = (char *)NULL;
mtp->next = Lmi;
mtp->dev = sb.st_dev;
mtp->rdev = sb.st_rdev;
mtp->inode = (INODETYPE)sb.st_ino;
mtp->mode = sb.st_mode;
mtp->is_nfs = strcasecmp(mb->f_fstypename, "nfs") ? 0 : 1;
/*
* Interpolate a possible file system (mounted-on) device name link.
*/
if (!(dn = mkstrcpy(mb->f_mntfromname, (MALLOC_S *)NULL)))
goto no_space_for_mount;
mtp->fsname = dn;
ln = Readlink(dn);
dn = (char *)NULL;
/*
* Stat() the file system (mounted-on) name and add file system
* information to the local mount table entry.
*/
if (!ln || statsafely(ln, &sb))
sb.st_mode = 0;
mtp->fsnmres = ln;
mtp->fs_mode = sb.st_mode;
Lmi = mtp;
}
/*
* Clean up and return the local mount info table address.
*/
if (dn)
(void) free((FREE_P *)dn);
Lmist = 1;
return(Lmi);
}
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