[dtrace-discuss] DTrace instead of `lsof`?

[Sean McGrath - Sun Microsystems Ireland]

Ian Campbell stated:
< With that syntax, you won't get info on existing processes.  Try the same
< with bash, for instance, then exec a new instance of bash.  You'll get some
< output.

  Really ?  Why would you think that ?

  Running dtrace after firefox has been started :

bash-3.00# dtrace -n 'syscall::open*:entry /execname == $1/ {printf("%s", copyinstr(arg0));}' firefox-bin
dtrace: description 'syscall::open*:entry ' matched 2 probes
CPU     ID                    FUNCTION:NAME
  1  44814                       open:entry /usr/openwin/lib/X11/fonts/Type1/cour.pfa
  0  45200                     open64:entry /export/home/comix/cronly
  1  45200                     open64:entry /home/sm97610/.mozilla/firefox/pluginreg.dat
  1  44814                       open:entry /home/sm97610/.mozilla/firefox/c5clxi2a.default/extensions.ini
  0  45200                     open64:entry /usr/share/mime/aliases
  0  45200                     open64:entry /usr/share/mime/subclasses
  0  45200                     open64:entry /usr/share/gnome//mime/aliases
  0  45200                     open64:entry /usr/share/gnome//mime/subclasses
  0  45200                     open64:entry /usr/sfw/share/mime/aliases
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Regards,

< 
< On 8/15/06, Sean McGrath - Sun Microsystems Ireland <sean.mcgrath at sun.com>
< wrote:
< >
< >UNIX admin stated:
< >< How would I replicate `lsof` functionality with DTrace?
< ><
< >< I tried for example
< ><
< >< dtrace -n 'syscall::open:entry /execname == $1/ {printf("%s",
< >copyinstr(arg0));}' named
< ><
< >
< >  You may need to match against open64 as well (32bit apps opening files
< >on
< >  64bit OS)..
< >
< >Regards,
< >
< >< but that does not seem to work, at least not in the way I expect. What I
< >expected to see was a list of open files that $1 has open, but instead I
< >just got how many probes DTrace matched. And no further output.
< ><
< ><
< >< This message posted from opensolaris.org
< >< _______________________________________________
< >< dtrace-discuss mailing list
< >< dtrace-discuss at opensolaris.org
< >
< >--
< >Sean.
< >.
< >_______________________________________________
< >dtrace-discuss mailing list
< >dtrace-discuss at opensolaris.org
< >

-- 
Sean.
.