opensnoop revision 1
303N/A#!/usr/bin/sh
303N/A#
303N/A# opensnoop - snoop file opens as they occur.
303N/A# Written using DTrace (Solaris 10 3/05).
303N/A#
303N/A# $Id: opensnoop 3 2007-08-01 10:50:08Z brendan $
303N/A#
303N/A# USAGE: opensnoop [-a|-A|-ceghsvxZ] [-f pathname] [-n name] [-p PID]
303N/A#
303N/A# opensnoop # default output
303N/A#
303N/A# -a # print most data
303N/A# -A # dump all data, space delimited
303N/A# -c # print cwd of process
303N/A# -e # print errno value
303N/A# -g # print command arguments
303N/A# -s # print start time, us
303N/A# -v # print start time, string
303N/A# -x # only print failed opens
303N/A# -Z # print zonename
5680N/A# -f pathname # file pathname to snoop
303N/A# -n name # command name to snoop
5680N/A# -p PID # process ID to snoop
5680N/A# eg,
5680N/A# opensnoop -v # human readable timestamps
5680N/A# opensnoop -e # see error codes
303N/A# opensnoop -f /etc/passwd # snoop this file only
303N/A#
303N/A# FIELDS:
6630N/A# ZONE Zone name
303N/A# UID User ID
303N/A# PID Process ID
844N/A# PPID Parent Process ID
6630N/A# FD file descriptor (-1 for error)
303N/A# ERR errno value (see /usr/include/sys/errno.h)
1258N/A# CWD print current working directory of process
303N/A# PATH pathname for file open
6630N/A# COMM command name for the process
3083N/A# ARGS argument listing for the process
5680N/A# TIME timestamp for the open event, us
303N/A# STRTIME timestamp for the open event, string
303N/A#
303N/A# SEE ALSO: truss, BSM auditing.
303N/A#
303N/A# COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
303N/A#
303N/A# CDDL HEADER START
303N/A#
303N/A# The contents of this file are subject to the terms of the
303N/A# Common Development and Distribution License, Version 1.0 only
303N/A# (the "License"). You may not use this file except in compliance
303N/A# with the License.
303N/A#
303N/A# You can obtain a copy of the license at Docs/cddl1.txt
303N/A# or http://www.opensolaris.org/os/licensing.
303N/A# See the License for the specific language governing permissions
4115N/A# and limitations under the License.
4115N/A#
4115N/A# CDDL HEADER END
4115N/A#
4115N/A# Author: Brendan Gregg [Sydney, Australia]
4115N/A#
4115N/A# 09-May-2004 Brendan Gregg Created this.
4115N/A# 21-Jan-2005 " " Wrapped in sh to provide options.
303N/A# 08-May-2005 " " Rewritten for performance.
303N/A# 14-May-2005 " " Added errno.
303N/A# 28-Jun-2005 " " Added cwd, zonename.
5680N/A# 17-Sep-2005 " " Increased switchrate, fixed page fault bug.
303N/A# 16-Jan-2006 " " Added -n, -p.
303N/A# 16-Jan-2006 " " Last update.
303N/A#
4115N/A
303N/A
303N/A##############################
303N/A# --- Process Arguments ---
1938N/A#
1938N/A
3817N/A### Default variables
3817N/Aopt_dump=0; opt_file=0; opt_time=0; opt_timestr=0; opt_args=0
opt_zone=0; opt_cwd=0; opt_failonly=0; opt_err=0; filter=0; pathname=.
opt_name=0; opt_pid=0; pname=.; pid=0
### Process options
while getopts aAcef:ghn:p:svxZ name
do
case $name in
a) opt_time=1; opt_timestr=1; opt_args=1; opt_err=1 ;;
A) opt_dump=1 ;;
c) opt_cwd=1 ;;
e) opt_err=1 ;;
g) opt_args=1 ;;
f) opt_file=1; pathname=$OPTARG ;;
n) opt_name=1; pname=$OPTARG ;;
p) opt_pid=1; pid=$OPTARG ;;
s) opt_time=1 ;;
v) opt_timestr=1 ;;
x) opt_failonly=1 ;;
Z) opt_zone=1 ;;
h|?) cat <<-END >&2
USAGE: opensnoop [-a|-A|-ceghsvxZ] [-f pathname]
[-n name] [-p PID]
opensnoop # default output
-a # print most data
-A # dump all data, space delimited
-c # print cwd of process
-e # print errno value
-g # print command arguments
-s # print start time, us
-v # print start time, string
-x # only print failed opens
-Z # print zonename
-f pathname # pathname name to snoop
-n name # process name to snoop
-p PID # process ID to snoop
eg,
opensnoop -v # human readable timestamps
opensnoop -e # see error codes
opensnoop -f /etc/motd # snoop this file only
END
exit 1
esac
done
### Option logic
if [ $opt_dump -eq 1 ]; then
opt_zone=0; opt_cwd=0; opt_time=0; opt_timestr=0; opt_args=2
fi
if [ $opt_name -eq 1 -o $opt_pid -eq 1 ]; then
filter=1
fi
#################################
# --- Main Program, DTrace ---
#
/usr/sbin/dtrace -n '
/*
* Command line arguments
*/
inline int OPT_dump = '$opt_dump';
inline int OPT_file = '$opt_file';
inline int OPT_args = '$opt_args';
inline int OPT_cwd = '$opt_cwd';
inline int OPT_err = '$opt_err';
inline int OPT_zone = '$opt_zone';
inline int OPT_time = '$opt_time';
inline int OPT_timestr = '$opt_timestr';
inline int OPT_failonly = '$opt_failonly';
inline int OPT_pid = '$opt_pid';
inline int OPT_name = '$opt_name';
inline int FILTER = '$filter';
inline int PID = '$pid';
inline string PATHNAME = "'$pathname'";
inline string NAME = "'$pname'";
#pragma D option quiet
#pragma D option switchrate=10hz
/*
* Print header
*/
dtrace:::BEGIN
{
/*
* ternary operators are used to improve performance.
* OPT_args is unusual in that it can have one of three values.
*/
/* print optional headers */
OPT_time ? printf("%-14s ", "TIME") : 1;
OPT_timestr ? printf("%-20s ", "STRTIME") : 1;
OPT_zone ? printf("%-10s ", "ZONE") : 1;
/* print dump headers */
OPT_dump ? printf("%s %s %s %s %s %s %s %s %s %s %s", "ZONE",
"TIME", "UID", "PID", "PPID", "COMM", "FD", "ERR", "CWD",
"PATH", "ARGS") : printf("%5s %6s ","UID","PID");
/* print main headers */
OPT_args == 0 ? printf("%-12s ", "COMM") : 1;
OPT_dump == 0 ? printf("%3s ", "FD") : 1;
OPT_err ? printf("%3s ", "ERR") : 1;
OPT_cwd ? printf("%-20s ", "CWD") : 1;
OPT_dump == 0 ? printf("%-20s ", "PATH") : 1;
OPT_args == 1 ? printf("%s", "ARGS") : 1;
printf("\n");
}
/*
* Print open event
*/
syscall::openat:entry, syscall::openat64:entry
{
/* save pathname */
self->pathp = arg1;
/* default is to trace unless filtering */
self->ok = FILTER ? 0 : 1;
/* check each filter */
(OPT_name == 1 && NAME == execname) ? self->ok = 1 : 1;
(OPT_pid == 1 && PID == pid) ? self->ok = 1 : 1;
/* OPT_file is checked on return to ensure pathp is mapped */
}
syscall::openat:return, syscall::openat64:return
/self->ok && (! OPT_failonly || (int)arg0 < 0) &&
((OPT_file == 0) || (OPT_file == 1 && PATHNAME == copyinstr(self->pathp)))/
{
/* print optional fields */
OPT_time ? printf("%-14d ", timestamp/1000) : 1;
OPT_timestr ? printf("%-20Y ", walltimestamp) : 1;
OPT_zone ? printf("%-10s ", zonename) : 1;
/* print dump fields */
OPT_dump ? printf("%s %d %d %d %d %s %d %d %s %s %S", zonename,
timestamp/1000, uid, pid, ppid, execname, (int)arg0, errno,
cwd, copyinstr(self->pathp), curpsinfo->pr_psargs) :
printf("%5d %6d ", uid, pid);
/* print main fields */
OPT_args == 0 ? printf("%-12s ", execname) : 1;
OPT_dump == 0 ? printf("%3d ", (int)arg0) : 1;
OPT_err ? printf("%3d ", errno) : 1;
OPT_cwd ? printf("%-20s ", cwd) : 1;
OPT_dump == 0 ? printf("%-20s ", copyinstr(self->pathp)) : 1;
OPT_args == 1 ? printf("%S", curpsinfo->pr_psargs) : 1;
printf("\n");
/* cleanup */
self->pathp = 0;
self->ok = 0;
}
/*
* Cleanup
*/
syscall::openat:return, syscall::openat64:return
/self->ok/
{
self->pathp = 0;
self->ok = 0;
}
'