This is tclbsd, a Tcl C extension written to provide Tcl bindings to various BSD UNIX system calls and library routines.
tclbsd provides interfaces to get the system load average (getloadavg), get and set hard and soft resource limits (rlimit), obtain the resource usage for the current process or its children (rusage), set the process title (setproctitle), get information about mounted filesystems (statfs and getfsstat), log to the system log (syslog), abort the process (abort), and obtain system clock counts (cptime).
Get it on github: http://github.com/flightaware/tclbsd
You can also clone the project with Git by running:
$ git clone git://github.com/flightaware/tclbsd
package require BSDGet load average. Three elements are returned, each representing the average number of processes is the system queue averaged over one, five and fifteen minutes, respectively.
lassign [::bsd::getloadavg] load1 load5 load15Get resource usage. A list of key-value pairs is returned.
array set rusage [::bsd::rusage] parray rusage...yielding...
rusage(fileSystemInputs) = 0 rusage(fileSystemOutputs) = 0 rusage(involuntaryContextSwitches) = 1 rusage(ipcMessagesReceived) = 0 rusage(ipcMessagesSent) = 0 rusage(maxResidentSetSizeKbytes) = 4116 rusage(nSignalsDelivered) = 0 rusage(nTimesSwapped) = 0 rusage(pageFaults) = 0 rusage(pageReclaims) = 546 rusage(sharedTextKbyteSeconds) = 0.25 rusage(stackKbyteSeconds) = 8.0 rusage(systemTimeUsed) = 0.01409 rusage(unsharedDataKbyteSeconds) = 64.0 rusage(userTimeUsed) = 0.042272 rusage(voluntaryContextSwitches) = 89Set process title. Pass an argument, pretty simple.
::bsd::setproctitle "this will show up in ps but usually not top"yields something like
PID TT STAT TIME COMMAND 20338 2 IWs 0:00.00 /usr/local/bin/bash 16678 4 Is+ 0:00.12 -bash (bash) 70797 8 I+ 0:00.95 vim index.html 71288 10 S+ 0:00.06 this will show up in ps but usually not top (tclsh8.5) 71431 10 R+ 0:00.00 /bin/ps 98222 17- I 28:21.37 peekaboostatfs returns information about a mounted filesystem...
array set statfs [::bsd::statfs /usr] parray statfsyielding
statfs(availableFreeBlocks) = 248899883 statfs(fileSystemType) = ufs statfs(flags) = softUpdates filesystemStoredLocally statfs(freeBlocks) = 280057534 statfs(freeFileNodes) = 96751664 statfs(fundamentalFileSystemBlockSize) = 2048 statfs(mountPoint) = /usr statfs(mountedFileSystem) = /dev/mfid0s1f statfs(totalDataBlocks) = 389470645 statfs(totalFileNodes) = 100708350
Likewise, ::bsd::getfsstat returns a list of lists for all mounted filesystems. Note you can past getfsstat a -wait or -nowait argument -- check the manpage for details.
The rlimit, syslog, abort and cptime commands are covered in the manpage.
This software is copyrighted by FlightAware LLC, and includes modified sample extension code copyright Scriptics corporation, and other parties. The following terms apply to all files associated with the software unless explicitly disclaimed in individual files. $Id: license.terms,v 1.2 2005-11-21 11:38:11 karl Exp $ The author hereby grants permission to use, copy, modify, distribute, and license this software and its documentation for any purpose, provided that existing copyright notices are retained in all copies and that this notice is included verbatim in any distributions. No written agreement, license, or royalty fee is required for any of the authorized uses. Modifications to this software may be copyrighted by their authors and need not follow the licensing terms described here, provided that the new terms are clearly indicated on the first page of each file where they apply. IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. GOVERNMENT USE: If you are acquiring this software on behalf of the U.S. government, the Government shall have only "Restricted Rights" in the software and related documentation as defined in the Federal Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you are acquiring the software on behalf of the Department of Defense, the software shall be classified as "Commercial Computer Software" and the Government shall have only "Restricted Rights" as defined in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the authors grant the U.S. Government and others acting in its behalf permission to use and distribute the software in accordance with the terms specified in this license.