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/*
* dmnt.c - AIX mount support functions for lsof
*/
/*
* Copyright 1994 Purdue Research Foundation, West Lafayette, Indiana
* 47907. All rights reserved.
*
* Written by Victor A. Abell
*
* 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 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 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 1994 Purdue Research Foundation.\nAll rights reserved.\n";
static char *rcsid = "$Id: dmnt.c,v 1.13 2005/08/08 19:46:38 abe Exp $";
#endif
#include "lsof.h"
/*
* Local static definitions
*/
static struct mounts *Lmi = (struct mounts *)NULL; /* local mount info */
static int Lmist = 0; /* Lmi status */
/*
* readmnt() - read mount table
*/
struct mounts *
readmnt()
{
char *dir, *fs, *h, *ln, *ty;
char *dn = (char *)NULL;
struct mounts *mtp;
int nm;
struct stat sb;
MALLOC_S sz;
struct vmount *v;
struct vmount *vt = (struct vmount *)NULL;
if (Lmi || Lmist)
return(Lmi);
/*
* Read the table of vmount structures.
*/
for (sz = sizeof(struct vmount);;) {
if (!(vt = (struct vmount *)malloc(sz))) {
(void) fprintf(stderr, "%s: no space for vmount table\n", Pn);
return(0);
}
nm = mntctl(MCTL_QUERY, sz, (unsigned char *)vt);
if (nm > 0) {
if (vt->vmt_revision != VMT_REVISION) {
(void) fprintf(stderr,
"%s: stale file system, rev %d != %d\n",
Pn, vt->vmt_revision, VMT_REVISION);
return(0);
}
break;
}
if (nm == 0) {
sz = (unsigned)vt->vmt_revision;
(void) free((FREE_P *)vt);
} else {
(void) fprintf(stderr, "%s: mntctl error: %s\n",
Pn, strerror(errno));
return(0);
}
}
/*
* Scan the vmount structures and build Lmi.
*/
for (v = vt; nm--; v = (struct vmount *)((char *)v + v->vmt_length)) {
dir = (char *)vmt2dataptr(v, VMT_STUB);
fs = (char *)vmt2dataptr(v, VMT_OBJECT);
h = (char *)vmt2dataptr(v, VMT_HOST);
if (statsafely(dir, &sb)) {
if (!Fwarn) {
/*
* Issue stat() failure warning.
*/
switch(v->vmt_gfstype) {
#if defined(HAS_AFS)
case MNT_AFS:
ty = "afs";
break;
#endif /* defined(HAS_AFS) */
#if defined(MNT_AIX) && defined(MNT_J2) && MNT_AIX==MNT_J2
case MNT_AIX:
ty = "jfs2";
break;
#else /* !defined(MNT_AIX) || !defined(MNT_J2) || MNT_AIX!=MNT_J2 */
# if defined(MNT_AIX)
case MNT_AIX:
ty = "oaix";
break;
# endif /* defined(MNT_AIX) */
# if defined(MNT_J2)
case MNT_J2:
ty = "jfs2";
break;
# endif /* defined(MNT_J2) */
#endif /* defined(MNT_AIX) && defined(MNT_H2) && MNT_AIX==MNT_J2 */
case MNT_CDROM:
ty = "cdrom";
break;
case MNT_JFS:
ty = "jfs";
break;
case MNT_NFS:
ty = "nfs";
break;
#if defined(MNT_NFS3)
case MNT_NFS3:
ty = "nfs3";
break;
#endif /* defined(MNT_NFS3) */
#if defined(HASPROCFS)
case MNT_PROCFS:
ty = HASPROCFS;
break;
#endif /* defined(HASPROCFS) */
#if defined(MNT_SANFS)
case MNT_SANFS:
ty = "sanfs";
break;
#endif /* defined(MNT_SANFS) */
default:
ty = "unknown";
}
(void) fprintf(stderr,
"%s: WARNING: can't stat() %s file system %s\n",
Pn, ty, dir);
(void) fprintf(stderr,
" Output information may be incomplete.\n");
}
/*
* Assemble alternate device number and mode flags.
*/
(void) bzero((char *)&sb, sizeof(sb));
if (v->vmt_flags & MNT_REMOTE) {
#if AIXA<2
sb.st_dev = (dev_t)(SDEV_REMOTE | v->vmt_vfsnumber);
#else /* AIXA>=2 */
sb.st_dev = (dev_t)(SDEV_REMOTE | (SDEV_REMOTE << 32)
| v->vmt_vfsnumber);
#endif /* AIXA<2 */
} else {
#if defined(HAS_AFS)
if (v->vmt_gfstype == MNT_AFS)
sb.st_dev = AFSDEV;
else
#endif /* defined(HAS_AFS) */
#if AIXA>=2 && defined(HASPROCFS)
if (v->vmt_gfstype == MNT_PROCFS) {
/*
* !!!DEBUG!!! !!!DEBUG!!! !!!DEBUG!!! !!!DEBUG!!!
*
* The following *hack* is required to make the vmount
* structure's device number match what stat(2)
* errnoneously returns on ia64 AIX 5L.
*
* REMOVE THIS CODE WHEN STAT(2) IS FIXED!!!
*/
sb.st_dev = (dev_t)(v->vmt_fsid.val[0]
& 0x7fffffffffffffff);
/*
* !!!DEBUG!!! !!!DEBUG!!! !!!DEBUG!!! !!!DEBUG!!!
*/
}
else
#endif /* AIXA>=2 && defined(HASPROCFS) */
sb.st_dev = (dev_t)v->vmt_fsid.val[0];
}
if (!Fwarn)
(void) fprintf(stderr,
" assuming \"dev=%#lx\" from mount table\n",
sb.st_dev);
sb.st_mode = S_IFDIR | 0777;
}
/*
* Allocate space for the directory (mounted on) and resolve
* any symbolic links.
*/
if (dn)
(void) free((FREE_P *)dn);
if (!(dn = mkstrcpy(dir, (MALLOC_S *)NULL))) {
no_space_for_mount:
(void) fprintf(stderr, "%s: no space for mount at %s (%s)\n",
Pn, fs, dir);
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;
/*
* Allocate a local mounts structure and fill the directory information.
*/
if (!(mtp = (struct mounts *)malloc(
(MALLOC_S)sizeof(struct mounts))))
goto no_space_for_mount;
mtp->dir = dn;
dn = (char *)NULL;
mtp->dev = sb.st_dev;
mtp->inode = (INODETYPE)sb.st_ino;
mtp->mode = sb.st_mode;
mtp->rdev = sb.st_rdev;
#if defined(HASFSTYPE)
mtp->fstype = sb.st_vfstype;
#endif /* defined(HASFSTYPE) */
mtp->next = Lmi;
/*
* Form the file system (mounted-on) device name. Resolve any
* symbolic links. Allocate space for the result and store it in
* the local mounts structure.
*/
if (h && (v->vmt_flags & MNT_REMOTE)) {
if (!(dn = mkstrcat(h, -1, *h ? ":" : "", 1, fs, -1,
(MALLOC_S *)NULL)))
goto no_space_for_mount;
} else {
if (!(dn = mkstrcpy(fs, (MALLOC_S *)NULL)))
goto no_space_for_mount;
}
mtp->fsname = dn;
ln = Readlink(dn);
dn = (char *)NULL;
/*
* Stat the file system (mounted-on) device name to get its modes.
* Set the modes to zero if the stat fails. Add file system
* (mounted-on) device information to the local mountsstructure.
*/
if (!ln || statsafely(ln, &sb))
sb.st_mode = 0;
mtp->fsnmres = ln;
mtp->fs_mode = sb.st_mode;
Lmi = mtp;
}
/*
* Clean up and return local mount info table address.
*/
if (dn)
(void) free((FREE_P *)dn);
if (vt)
(void) free((FREE_P *)vt);
Lmist = 1;
return(Lmi);
}
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