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freebsd/usr.bin/fstat/fstat.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

570 lines
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2009 Stanislav Sedov <stas@FreeBSD.org>
* 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. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <libprocstat.h>
#include <limits.h>
#include <pwd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include "functions.h"
static 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 */
static int checkfile; /* restrict to particular files or filesystems */
static int nflg; /* (numerical) display f.s. and rdev as dev_t */
static int mflg; /* include memory-mapped files */
static int vflg; /* be verbose */
typedef struct devs {
struct devs *next;
uint64_t fsid;
uint64_t ino;
const char *name;
} DEVS;
static DEVS *devs;
static char *memf, *nlistf;
static int getfname(const char *filename);
static void dofiles(struct procstat *procstat, struct kinfo_proc *p);
static void print_access_flags(int flags);
static void print_file_info(struct procstat *procstat,
struct filestat *fst, const char *uname, const char *cmd, int pid);
static void print_pipe_info(struct procstat *procstat,
struct filestat *fst);
static void print_pts_info(struct procstat *procstat,
struct filestat *fst);
static void print_sem_info(struct procstat *procstat,
struct filestat *fst);
static void print_shm_info(struct procstat *procstat,
struct filestat *fst);
static void print_socket_info(struct procstat *procstat,
struct filestat *fst);
static void print_vnode_info(struct procstat *procstat,
struct filestat *fst);
static void usage(void) __dead2;
int
do_fstat(int argc, char **argv)
{
struct kinfo_proc *p;
struct passwd *passwd;
struct procstat *procstat;
int arg, ch, what;
int cnt, i;
arg = 0;
what = KERN_PROC_PROC;
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 accessible */
exit(1);
}
if (fsflg && !checkfile) {
/* -f with no files means use wd */
if (getfname(".") == 0)
exit(1);
checkfile = 1;
}
if (memf != NULL)
procstat = procstat_open_kvm(nlistf, memf);
else
procstat = procstat_open_sysctl();
if (procstat == NULL)
errx(1, "procstat_open()");
p = procstat_getprocs(procstat, what, arg, &cnt);
if (p == NULL)
errx(1, "procstat_getprocs()");
/*
* Print header.
*/
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');
/*
* Go through the process list.
*/
for (i = 0; i < cnt; i++) {
if (p[i].ki_stat == SZOMB)
continue;
dofiles(procstat, &p[i]);
}
procstat_freeprocs(procstat, p);
procstat_close(procstat);
return (0);
}
static void
dofiles(struct procstat *procstat, struct kinfo_proc *kp)
{
const char *cmd;
const char *uname;
struct filestat *fst;
struct filestat_list *head;
int pid;
uname = user_from_uid(kp->ki_uid, 0);
pid = kp->ki_pid;
cmd = kp->ki_comm;
head = procstat_getfiles(procstat, kp, mflg);
if (head == NULL)
return;
STAILQ_FOREACH(fst, head, next)
print_file_info(procstat, fst, uname, cmd, pid);
procstat_freefiles(procstat, head);
}
static void
print_file_info(struct procstat *procstat, struct filestat *fst,
const char *uname, const char *cmd, int pid)
{
struct vnstat vn;
DEVS *d;
const char *filename;
int error, fsmatch = 0;
char errbuf[_POSIX2_LINE_MAX];
filename = NULL;
if (checkfile != 0) {
if (fst->fs_type != PS_FST_TYPE_VNODE &&
fst->fs_type != PS_FST_TYPE_FIFO)
return;
error = procstat_get_vnode_info(procstat, fst, &vn, errbuf);
if (error != 0)
return;
for (d = devs; d != NULL; d = d->next)
if (d->fsid == vn.vn_fsid) {
fsmatch = 1;
if (d->ino == vn.vn_fileid) {
filename = d->name;
break;
}
}
if (fsmatch == 0 || (filename == NULL && fsflg == 0))
return;
}
/*
* Print entry prefix.
*/
printf("%-8.8s %-10s %5d", uname, cmd, pid);
if (fst->fs_uflags & PS_FST_UFLAG_TEXT)
printf(" text");
else if (fst->fs_uflags & PS_FST_UFLAG_CDIR)
printf(" wd");
else if (fst->fs_uflags & PS_FST_UFLAG_RDIR)
printf(" root");
else if (fst->fs_uflags & PS_FST_UFLAG_TRACE)
printf(" tr");
else if (fst->fs_uflags & PS_FST_UFLAG_MMAP)
printf(" mmap");
else if (fst->fs_uflags & PS_FST_UFLAG_JAIL)
printf(" jail");
else if (fst->fs_uflags & PS_FST_UFLAG_CTTY)
printf(" ctty");
else
printf(" %4d", fst->fs_fd);
/*
* Print type-specific data.
*/
switch (fst->fs_type) {
case PS_FST_TYPE_FIFO:
case PS_FST_TYPE_VNODE:
print_vnode_info(procstat, fst);
break;
case PS_FST_TYPE_SOCKET:
print_socket_info(procstat, fst);
break;
case PS_FST_TYPE_PIPE:
print_pipe_info(procstat, fst);
break;
case PS_FST_TYPE_PTS:
print_pts_info(procstat, fst);
break;
case PS_FST_TYPE_SHM:
print_shm_info(procstat, fst);
break;
case PS_FST_TYPE_SEM:
print_sem_info(procstat, fst);
break;
default:
if (vflg)
fprintf(stderr,
"unknown file type %d for file %d of pid %d\n",
fst->fs_type, fst->fs_fd, pid);
}
if (filename && !fsflg)
printf(" %s", filename);
putchar('\n');
}
static void
print_socket_info(struct procstat *procstat, struct filestat *fst)
{
static const char *stypename[] = {
"unused", /* 0 */
"stream", /* 1 */
"dgram", /* 2 */
"raw", /* 3 */
"rdm", /* 4 */
"seqpak" /* 5 */
};
#define STYPEMAX 5
struct sockstat sock;
struct protoent *pe;
char errbuf[_POSIX2_LINE_MAX];
int error;
static int isopen;
error = procstat_get_socket_info(procstat, fst, &sock, errbuf);
if (error != 0) {
printf("* error");
return;
}
if (sock.type > STYPEMAX)
printf("* %s ?%d", sock.dname, sock.type);
else
printf("* %s %s", sock.dname, stypename[sock.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 (sock.dom_family) {
case AF_INET:
case AF_INET6:
if (!isopen)
setprotoent(++isopen);
if ((pe = getprotobynumber(sock.proto)) != NULL)
printf(" %s", pe->p_name);
else
printf(" %d", sock.proto);
if (sock.proto == IPPROTO_TCP ) {
if (sock.inp_ppcb != 0)
printf(" %lx", (u_long)sock.inp_ppcb);
}
else if (sock.so_pcb != 0)
printf(" %lx", (u_long)sock.so_pcb);
break;
case AF_UNIX:
/* print address of pcb and connected pcb */
if (sock.so_pcb != 0) {
printf(" %lx", (u_long)sock.so_pcb);
if (sock.unp_conn) {
char shoconn[4], *cp;
cp = shoconn;
if (!(sock.so_rcv_sb_state & SBS_CANTRCVMORE))
*cp++ = '<';
*cp++ = '-';
if (!(sock.so_snd_sb_state & SBS_CANTSENDMORE))
*cp++ = '>';
*cp = '\0';
printf(" %s %lx", shoconn,
(u_long)sock.unp_conn);
}
}
break;
default:
/* print protocol number and socket address */
printf(" %d %lx", sock.proto, (u_long)sock.so_addr);
}
}
static void
print_pipe_info(struct procstat *procstat, struct filestat *fst)
{
struct pipestat ps;
char errbuf[_POSIX2_LINE_MAX];
int error;
error = procstat_get_pipe_info(procstat, fst, &ps, errbuf);
if (error != 0) {
printf("* error");
return;
}
printf("* pipe %8lx <-> %8lx", (u_long)ps.addr, (u_long)ps.peer);
printf(" %6zd", ps.buffer_cnt);
print_access_flags(fst->fs_fflags);
}
static void
print_pts_info(struct procstat *procstat, struct filestat *fst)
{
struct ptsstat pts;
char errbuf[_POSIX2_LINE_MAX];
int error;
error = procstat_get_pts_info(procstat, fst, &pts, errbuf);
if (error != 0) {
printf("* error");
return;
}
printf("* pseudo-terminal master ");
if (nflg || !*pts.devname) {
printf("%#10jx", (uintmax_t)pts.dev);
} else {
printf("%10s", pts.devname);
}
print_access_flags(fst->fs_fflags);
}
static void
print_sem_info(struct procstat *procstat, struct filestat *fst)
{
struct semstat sem;
char errbuf[_POSIX2_LINE_MAX];
char mode[15];
int error;
error = procstat_get_sem_info(procstat, fst, &sem, errbuf);
if (error != 0) {
printf("* error");
return;
}
if (nflg) {
printf(" ");
(void)snprintf(mode, sizeof(mode), "%o", sem.mode);
} else {
printf(" %-15s", fst->fs_path != NULL ? fst->fs_path : "-");
strmode(sem.mode, mode);
}
printf(" %10s %6u", mode, sem.value);
print_access_flags(fst->fs_fflags);
}
static void
print_shm_info(struct procstat *procstat, struct filestat *fst)
{
struct shmstat shm;
char errbuf[_POSIX2_LINE_MAX];
char mode[15];
int error;
error = procstat_get_shm_info(procstat, fst, &shm, errbuf);
if (error != 0) {
printf("* error");
return;
}
if (nflg) {
printf(" ");
(void)snprintf(mode, sizeof(mode), "%o", shm.mode);
} else {
printf(" %-15s", fst->fs_path != NULL ? fst->fs_path : "-");
strmode(shm.mode, mode);
}
printf(" %10s %6ju", mode, shm.size);
print_access_flags(fst->fs_fflags);
}
static void
print_vnode_info(struct procstat *procstat, struct filestat *fst)
{
struct vnstat vn;
char errbuf[_POSIX2_LINE_MAX];
char mode[15];
const char *badtype;
int error;
badtype = NULL;
error = procstat_get_vnode_info(procstat, fst, &vn, errbuf);
if (error != 0)
badtype = errbuf;
else if (vn.vn_type == PS_FST_VTYPE_VBAD)
badtype = "bad";
else if (vn.vn_type == PS_FST_VTYPE_VNON)
badtype = "none";
if (badtype != NULL) {
printf(" - - %10s -", badtype);
return;
}
if (nflg)
printf(" %#5jx", (uintmax_t)vn.vn_fsid);
else if (vn.vn_mntdir != NULL)
(void)printf(" %-8s", vn.vn_mntdir);
/*
* Print access mode.
*/
if (nflg)
(void)snprintf(mode, sizeof(mode), "%o", vn.vn_mode);
else {
strmode(vn.vn_mode, mode);
}
(void)printf(" %6jd %10s", (intmax_t)vn.vn_fileid, mode);
if (vn.vn_type == PS_FST_VTYPE_VBLK || vn.vn_type == PS_FST_VTYPE_VCHR) {
if (nflg || !*vn.vn_devname)
printf(" %#6jx", (uintmax_t)vn.vn_dev);
else {
printf(" %6s", vn.vn_devname);
}
} else
printf(" %6ju", (uintmax_t)vn.vn_size);
print_access_flags(fst->fs_fflags);
}
static void
print_access_flags(int flags)
{
char rw[3];
rw[0] = '\0';
if (flags & PS_FST_FFLAG_READ)
strcat(rw, "r");
if (flags & PS_FST_FFLAG_WRITE)
strcat(rw, "w");
printf(" %2s", rw);
}
int
getfname(const 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;
cur->name = filename;
return (1);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: fstat [-fmnv] [-M core] [-N system] [-p pid] [-u user] [file ...]\n");
exit(1);
}
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