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41fced74eb
freebsd/usr.bin/fstat/fstat.c
Brian Feldman d0482be885 Add a new options: -m enables searching for memory-mapped files. 
It is not default because it's an expensive option by nature, making the
search take 2-3 times as long.

PR:		17555
Submitted by:	Ian Dowse <iedowse@maths.tcd.ie>
2000-04-05 05:45:40 +00:00

874 lines
19 KiB
C
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/*-
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)fstat.c 8.3 (Berkeley) 5/2/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <sys/sysctl.h>
#include <sys/filedesc.h>
#include <sys/queue.h>
#include <sys/pipe.h>
#include <sys/conf.h>
#define _KERNEL
#include <sys/file.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#undef _KERNEL
#include <sys/mount.h>
#include <nfs/nfsproto.h>
#include <nfs/rpcv2.h>
#include <nfs/nfs.h>
#include <nfs/nfsnode.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <nlist.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include "fstat.h"
#define TEXT -1
#define CDIR -2
#define RDIR -3
#define TRACE -4
#define MMAP -5
DEVS *devs;
#ifdef notdef
struct nlist nl[] = {
{ "" },
};
#endif
int fsflg, /* show files on same filesystem as file(s) argument */
pflg, /* show files open by a particular pid */
uflg; /* show files open by a particular (effective) user */
int checkfile; /* true if restricting to particular files or filesystems */
int nflg; /* (numerical) display f.s. and rdev as dev_t */
int vflg; /* display errors in locating kernel data objects etc... */
int mflg; /* include memory-mapped files */
struct file **ofiles; /* buffer of pointers to file structures */
int maxfiles;
#define ALLOC_OFILES(d) \
if ((d) > maxfiles) { \
free(ofiles); \
ofiles = malloc((d) * sizeof(struct file *)); \
if (ofiles == NULL) { \
err(1, NULL); \
} \
maxfiles = (d); \
}
kvm_t *kd;
void dofiles __P((struct kinfo_proc *kp));
void dommap __P((struct kinfo_proc *kp));
void vtrans __P((struct vnode *vp, int i, int flag));
int ufs_filestat __P((struct vnode *vp, struct filestat *fsp));
int nfs_filestat __P((struct vnode *vp, struct filestat *fsp));
char *getmnton __P((struct mount *m));
void pipetrans __P((struct pipe *pi, int i, int flag));
void socktrans __P((struct socket *sock, int i));
void getinetproto __P((int number));
int getfname __P((char *filename));
void usage __P((void));
int
main(argc, argv)
int argc;
char **argv;
{
register struct passwd *passwd;
struct kinfo_proc *p, *plast;
int arg, ch, what;
char *memf, *nlistf;
char buf[_POSIX2_LINE_MAX];
int cnt;
arg = 0;
what = KERN_PROC_ALL;
nlistf = memf = NULL;
while ((ch = getopt(argc, argv, "fmnp:u:vN:M:")) != -1)
switch((char)ch) {
case 'f':
fsflg = 1;
break;
case 'M':
memf = optarg;
break;
case 'N':
nlistf = optarg;
break;
case 'm':
mflg = 1;
break;
case 'n':
nflg = 1;
break;
case 'p':
if (pflg++)
usage();
if (!isdigit(*optarg)) {
warnx("-p requires a process id");
usage();
}
what = KERN_PROC_PID;
arg = atoi(optarg);
break;
case 'u':
if (uflg++)
usage();
if (!(passwd = getpwnam(optarg)))
errx(1, "%s: unknown uid", optarg);
what = KERN_PROC_UID;
arg = passwd->pw_uid;
break;
case 'v':
vflg = 1;
break;
case '?':
default:
usage();
}
if (*(argv += optind)) {
for (; *argv; ++argv) {
if (getfname(*argv))
checkfile = 1;
}
if (!checkfile) /* file(s) specified, but none accessable */
exit(1);
}
ALLOC_OFILES(256); /* reserve space for file pointers */
if (fsflg && !checkfile) {
/* -f with no files means use wd */
if (getfname(".") == 0)
exit(1);
checkfile = 1;
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL)
setgid(getgid());
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == NULL)
errx(1, "%s", buf);
#ifdef notdef
if (kvm_nlist(kd, nl) != 0)
errx(1, "no namelist: %s", kvm_geterr(kd));
#endif
if ((p = kvm_getprocs(kd, what, arg, &cnt)) == NULL)
errx(1, "%s", kvm_geterr(kd));
if (nflg)
printf("%s",
"USER CMD PID FD DEV INUM MODE SZ|DV R/W");
else
printf("%s",
"USER CMD PID FD MOUNT INUM MODE SZ|DV R/W");
if (checkfile && fsflg == 0)
printf(" NAME\n");
else
putchar('\n');
for (plast = &p[cnt]; p < plast; ++p) {
if (p->kp_proc.p_stat == SZOMB)
continue;
dofiles(p);
if (mflg)
dommap(p);
}
exit(0);
}
char *Uname, *Comm;
int Pid;
#define PREFIX(i) printf("%-8.8s %-10s %5d", Uname, Comm, Pid); \
switch(i) { \
case TEXT: \
printf(" text"); \
break; \
case CDIR: \
printf(" wd"); \
break; \
case RDIR: \
printf(" root"); \
break; \
case TRACE: \
printf(" tr"); \
break; \
case MMAP: \
printf(" mmap"); \
break; \
default: \
printf(" %4d", i); \
break; \
}
/*
* print open files attributed to this process
*/
void
dofiles(kp)
struct kinfo_proc *kp;
{
int i;
struct file file;
struct filedesc0 filed0;
#define filed filed0.fd_fd
struct proc *p = &kp->kp_proc;
struct eproc *ep = &kp->kp_eproc;
Uname = user_from_uid(ep->e_ucred.cr_uid, 0);
Pid = p->p_pid;
Comm = p->p_comm;
if (p->p_fd == NULL)
return;
if (!KVM_READ(p->p_fd, &filed0, sizeof (filed0))) {
dprintf(stderr, "can't read filedesc at %p for pid %d\n",
(void *)p->p_fd, Pid);
return;
}
/*
* root directory vnode, if one
*/
if (filed.fd_rdir)
vtrans(filed.fd_rdir, RDIR, FREAD);
/*
* current working directory vnode
*/
vtrans(filed.fd_cdir, CDIR, FREAD);
/*
* ktrace vnode, if one
*/
if (p->p_tracep)
vtrans(p->p_tracep, TRACE, FREAD|FWRITE);
/*
* text vnode, if one
*/
if (p->p_textvp)
vtrans(p->p_textvp, TEXT, FREAD);
/*
* open files
*/
#define FPSIZE (sizeof (struct file *))
ALLOC_OFILES(filed.fd_lastfile+1);
if (filed.fd_nfiles > NDFILE) {
if (!KVM_READ(filed.fd_ofiles, ofiles,
(filed.fd_lastfile+1) * FPSIZE)) {
dprintf(stderr,
"can't read file structures at %p for pid %d\n",
(void *)filed.fd_ofiles, Pid);
return;
}
} else
bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE);
for (i = 0; i <= filed.fd_lastfile; i++) {
if (ofiles[i] == NULL)
continue;
if (!KVM_READ(ofiles[i], &file, sizeof (struct file))) {
dprintf(stderr, "can't read file %d at %p for pid %d\n",
i, (void *)ofiles[i], Pid);
continue;
}
if (file.f_type == DTYPE_VNODE)
vtrans((struct vnode *)file.f_data, i, file.f_flag);
else if (file.f_type == DTYPE_SOCKET) {
if (checkfile == 0)
socktrans((struct socket *)file.f_data, i);
}
#ifdef DTYPE_PIPE
else if (file.f_type == DTYPE_PIPE) {
if (checkfile == 0)
pipetrans((struct pipe *)file.f_data, i,
file.f_flag);
}
#endif
else {
dprintf(stderr,
"unknown file type %d for file %d of pid %d\n",
file.f_type, i, Pid);
}
}
}
void
dommap(kp)
struct kinfo_proc *kp;
{
struct proc *p = &kp->kp_proc;
struct vmspace vmspace;
vm_map_t map;
struct vm_map_entry entry;
vm_map_entry_t entryp;
struct vm_object object;
vm_object_t objp;
int prot, fflags;
if (!KVM_READ(p->p_vmspace, &vmspace, sizeof(vmspace))) {
dprintf(stderr, "can't read vmspace at %p for pid %d\n",
(void *)p->p_vmspace, Pid);
return;
}
map = &vmspace.vm_map;
for (entryp = map->header.next; entryp != &p->p_vmspace->vm_map.header;
entryp = entry.next) {
if (!KVM_READ(entryp, &entry, sizeof(entry))) {
dprintf(stderr,
"can't read vm_map_entry at %p for pid %d\n",
(void *)entryp, Pid);
return;
}
if (entry.eflags & MAP_ENTRY_IS_SUB_MAP)
continue;
if ((objp = entry.object.vm_object) == NULL)
continue;
for (; objp; objp = object.backing_object) {
if (!KVM_READ(objp, &object, sizeof(object))) {
dprintf(stderr,
"can't read vm_object at %p for pid %d\n",
(void *)objp, Pid);
return;
}
}
prot = entry.protection;
fflags = (prot & VM_PROT_READ ? FREAD : 0) |
(prot & VM_PROT_WRITE ? FWRITE : 0);
switch (object.type) {
case OBJT_VNODE:
vtrans((struct vnode *)object.handle, MMAP, fflags);
break;
default:
break;
}
}
}
void
vtrans(vp, i, flag)
struct vnode *vp;
int i;
int flag;
{
struct vnode vn;
struct filestat fst;
char rw[3], mode[15];
char *badtype = NULL, *filename, *getmnton();
filename = badtype = NULL;
if (!KVM_READ(vp, &vn, sizeof (struct vnode))) {
dprintf(stderr, "can't read vnode at %p for pid %d\n",
(void *)vp, Pid);
return;
}
if (vn.v_type == VNON || vn.v_tag == VT_NON)
badtype = "none";
else if (vn.v_type == VBAD)
badtype = "bad";
else
switch (vn.v_tag) {
case VT_UFS:
if (!ufs_filestat(&vn, &fst))
badtype = "error";
break;
case VT_MFS:
if (!ufs_filestat(&vn, &fst))
badtype = "error";
break;
case VT_NFS:
if (!nfs_filestat(&vn, &fst))
badtype = "error";
break;
case VT_MSDOSFS:
if (!msdosfs_filestat(&vn, &fst))
badtype = "error";
break;
case VT_ISOFS:
if (!isofs_filestat(&vn, &fst))
badtype = "error";
break;
default: {
static char unknown[10];
sprintf(badtype = unknown, "?(%x)", vn.v_tag);
break;;
}
}
if (checkfile) {
int fsmatch = 0;
register DEVS *d;
if (badtype)
return;
for (d = devs; d != NULL; d = d->next)
if (d->fsid == fst.fsid) {
fsmatch = 1;
if (d->ino == fst.fileid) {
filename = d->name;
break;
}
}
if (fsmatch == 0 || (filename == NULL && fsflg == 0))
return;
}
PREFIX(i);
if (badtype) {
(void)printf(" - - %10s -\n", badtype);
return;
}
if (nflg)
(void)printf(" %2d,%-2d", major(fst.fsid), minor(fst.fsid));
else
(void)printf(" %-8s", getmnton(vn.v_mount));
if (nflg)
(void)sprintf(mode, "%o", fst.mode);
else
strmode(fst.mode, mode);
(void)printf(" %6ld %10s", fst.fileid, mode);
switch (vn.v_type) {
case VBLK:
case VCHR: {
char *name;
if (nflg || ((name = devname(fst.rdev, vn.v_type == VCHR ?
S_IFCHR : S_IFBLK)) == NULL))
printf(" %2d,%-2d", major(fst.rdev), minor(fst.rdev));
else
printf(" %6s", name);
break;
}
default:
printf(" %6lu", fst.size);
}
rw[0] = '\0';
if (flag & FREAD)
strcat(rw, "r");
if (flag & FWRITE)
strcat(rw, "w");
printf(" %2s", rw);
if (filename && !fsflg)
printf(" %s", filename);
putchar('\n');
}
int
ufs_filestat(vp, fsp)
struct vnode *vp;
struct filestat *fsp;
{
struct inode inode;
if (!KVM_READ(VTOI(vp), &inode, sizeof (inode))) {
dprintf(stderr, "can't read inode at %p for pid %d\n",
(void *)VTOI(vp), Pid);
return 0;
}
/*
* The st_dev from stat(2) is a udev_t. These kernel structures
* contain dev_t structures. We need to convert to udev to make
* comparisons
*/
fsp->fsid = dev2udev(inode.i_dev) & 0xffff;
fsp->fileid = (long)inode.i_number;
fsp->mode = (mode_t)inode.i_mode;
fsp->size = (u_long)inode.i_size;
fsp->rdev = inode.i_rdev;
return 1;
}
int
nfs_filestat(vp, fsp)
struct vnode *vp;
struct filestat *fsp;
{
struct nfsnode nfsnode;
register mode_t mode;
if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) {
dprintf(stderr, "can't read nfsnode at %p for pid %d\n",
(void *)VTONFS(vp), Pid);
return 0;
}
fsp->fsid = nfsnode.n_vattr.va_fsid;
fsp->fileid = nfsnode.n_vattr.va_fileid;
fsp->size = nfsnode.n_size;
fsp->rdev = nfsnode.n_vattr.va_rdev;
mode = (mode_t)nfsnode.n_vattr.va_mode;
switch (vp->v_type) {
case VREG:
mode |= S_IFREG;
break;
case VDIR:
mode |= S_IFDIR;
break;
case VBLK:
mode |= S_IFBLK;
break;
case VCHR:
mode |= S_IFCHR;
break;
case VLNK:
mode |= S_IFLNK;
break;
case VSOCK:
mode |= S_IFSOCK;
break;
case VFIFO:
mode |= S_IFIFO;
break;
case VNON:
case VBAD:
return 0;
};
fsp->mode = mode;
return 1;
}
char *
getmnton(m)
struct mount *m;
{
static struct mount mount;
static struct mtab {
struct mtab *next;
struct mount *m;
char mntonname[MNAMELEN];
} *mhead = NULL;
register struct mtab *mt;
for (mt = mhead; mt != NULL; mt = mt->next)
if (m == mt->m)
return (mt->mntonname);
if (!KVM_READ(m, &mount, sizeof(struct mount))) {
warnx("can't read mount table at %p", (void *)m);
return (NULL);
}
if ((mt = malloc(sizeof (struct mtab))) == NULL)
err(1, NULL);
mt->m = m;
bcopy(&mount.mnt_stat.f_mntonname[0], &mt->mntonname[0], MNAMELEN);
mt->next = mhead;
mhead = mt;
return (mt->mntonname);
}
void
pipetrans(pi, i, flag)
struct pipe *pi;
int i;
int flag;
{
struct pipe pip;
char rw[3];
PREFIX(i);
/* fill in socket */
if (!KVM_READ(pi, &pip, sizeof(struct pipe))) {
dprintf(stderr, "can't read pipe at %p\n", (void *)pi);
goto bad;
}
printf("* pipe %8x <-> %8x", (int)pi, (int)pip.pipe_peer);
printf(" %6d", (int)pip.pipe_buffer.cnt);
rw[0] = '\0';
if (flag & FREAD)
strcat(rw, "r");
if (flag & FWRITE)
strcat(rw, "w");
printf(" %2s", rw);
putchar('\n');
return;
bad:
printf("* error\n");
}
void
socktrans(sock, i)
struct socket *sock;
int i;
{
static char *stypename[] = {
"unused", /* 0 */
"stream", /* 1 */
"dgram", /* 2 */
"raw", /* 3 */
"rdm", /* 4 */
"seqpak" /* 5 */
};
#define STYPEMAX 5
struct socket so;
struct protosw proto;
struct domain dom;
struct inpcb inpcb;
struct unpcb unpcb;
int len;
char dname[32], *strcpy();
PREFIX(i);
/* fill in socket */
if (!KVM_READ(sock, &so, sizeof(struct socket))) {
dprintf(stderr, "can't read sock at %p\n", (void *)sock);
goto bad;
}
/* fill in protosw entry */
if (!KVM_READ(so.so_proto, &proto, sizeof(struct protosw))) {
dprintf(stderr, "can't read protosw at %p",
(void *)so.so_proto);
goto bad;
}
/* fill in domain */
if (!KVM_READ(proto.pr_domain, &dom, sizeof(struct domain))) {
dprintf(stderr, "can't read domain at %p\n",
(void *)proto.pr_domain);
goto bad;
}
if ((len = kvm_read(kd, (u_long)dom.dom_name, dname,
sizeof(dname) - 1)) < 0) {
dprintf(stderr, "can't read domain name at %p\n",
(void *)dom.dom_name);
dname[0] = '\0';
}
else
dname[len] = '\0';
if ((u_short)so.so_type > STYPEMAX)
printf("* %s ?%d", dname, so.so_type);
else
printf("* %s %s", dname, stypename[so.so_type]);
/*
* protocol specific formatting
*
* Try to find interesting things to print. For tcp, the interesting
* thing is the address of the tcpcb, for udp and others, just the
* inpcb (socket pcb). For unix domain, its the address of the socket
* pcb and the address of the connected pcb (if connected). Otherwise
* just print the protocol number and address of the socket itself.
* The idea is not to duplicate netstat, but to make available enough
* information for further analysis.
*/
switch(dom.dom_family) {
case AF_INET:
case AF_INET6:
getinetproto(proto.pr_protocol);
if (proto.pr_protocol == IPPROTO_TCP ) {
if (so.so_pcb) {
if (kvm_read(kd, (u_long)so.so_pcb,
(char *)&inpcb, sizeof(struct inpcb))
!= sizeof(struct inpcb)) {
dprintf(stderr,
"can't read inpcb at %p\n",
(void *)so.so_pcb);
goto bad;
}
printf(" %x", (int)inpcb.inp_ppcb);
}
}
else if (so.so_pcb)
printf(" %x", (int)so.so_pcb);
break;
case AF_UNIX:
/* print address of pcb and connected pcb */
if (so.so_pcb) {
printf(" %x", (int)so.so_pcb);
if (kvm_read(kd, (u_long)so.so_pcb, (char *)&unpcb,
sizeof(struct unpcb)) != sizeof(struct unpcb)){
dprintf(stderr, "can't read unpcb at %p\n",
(void *)so.so_pcb);
goto bad;
}
if (unpcb.unp_conn) {
char shoconn[4], *cp;
cp = shoconn;
if (!(so.so_state & SS_CANTRCVMORE))
*cp++ = '<';
*cp++ = '-';
if (!(so.so_state & SS_CANTSENDMORE))
*cp++ = '>';
*cp = '\0';
printf(" %s %x", shoconn,
(int)unpcb.unp_conn);
}
}
break;
default:
/* print protocol number and socket address */
printf(" %d %x", proto.pr_protocol, (int)sock);
}
printf("\n");
return;
bad:
printf("* error\n");
}
/*
* Read the specinfo structure in the kernel (as pointed to by a dev_t)
* in order to work out the associated udev_t
*/
udev_t
dev2udev(dev)
dev_t dev;
{
struct specinfo si;
if (KVM_READ(dev, &si, sizeof si)) {
return si.si_udev;
} else {
dprintf(stderr, "can't convert dev_t %p to a udev_t\n",
(void *)dev);
return -1;
}
}
/*
* getinetproto --
* print name of protocol number
*/
void
getinetproto(number)
int number;
{
static int isopen;
register struct protoent *pe;
if (!isopen)
setprotoent(++isopen);
if ((pe = getprotobynumber(number)) != NULL)
printf(" %s", pe->p_name);
else
printf(" %d", number);
}
int
getfname(filename)
char *filename;
{
struct stat statbuf;
DEVS *cur;
if (stat(filename, &statbuf)) {
warn("%s", filename);
return(0);
}
if ((cur = malloc(sizeof(DEVS))) == NULL)
err(1, NULL);
cur->next = devs;
devs = cur;
cur->ino = statbuf.st_ino;
cur->fsid = statbuf.st_dev & 0xffff;
cur->name = filename;
return(1);
}
void
usage()
{
(void)fprintf(stderr,
"usage: fstat [-fmnv] [-p pid] [-u user] [-N system] [-M core] [file ...]\n");
exit(1);
}
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