lxproc man page on SmartOS

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LXPROC(7FS)							   LXPROC(7FS)

       lxproc - a loosely Linux-compatible /proc

       mount ("lxproc", directory, MS_DATA, "lxproc", NULL, 0);

       lxproc  is  an  implementation  of  the	/proc  filesystem that loosely
       matches the Linux semantics of providing human-readable text files that
       correspond  to  elements of the system.	As with both proc(4) and Linux
       /proc, lxproc makes available a directory for every process, with  each
       directory  containing  a	 number	 of files; like Linux /proc but unlike
       proc(4), lxproc also makes available a number of files related to  sys‐
       tem-wide	 information.	To  ascertain the meaning and structure of the
       files provided via lxproc, users should consult	the  Linux  documenta‐

       The  lxproc  compatibility  layer is provided only as a best-effort for
       simple Linux /proc readers; it is not intended to exactly  mimic	 Linux
       semantics  and  nor  does  it  attempt  to somehow fool a consumer into
       believing that it is operating within a	Linux  environment.  As	 such,
       lxproc  should only be used by Linux-specific programs that are willing
       to trade precision in understanding the system in return for Linux com‐
       patibility.  To programmatically understand the system precisely and in
       terms of its native constructs, one should not use lxproc,  but	rather
       proc(4)	or  kstat(3KSTAT).   To	 understand a process or group of pro‐
       cesses from either a shell script or the command line, one  should  not
       use  lxproc, but rather proc(4)-based tools like prstat(1M), pfiles(1),
       pargs(1), pmap(1), ptree(1), plimit(1), pflags(1), pcred(1), pstack(1),
       pldd(1),	 psig(1),  or  pwdx(1).	  To understand system-wide constructs
       from either a shell script or the command  line,	 one  should  not  use
       lxproc,	 but   rather	kstat(3KSTAT)-based   tools   like  kstat(1M),
       mpstat(1M), iostat(1M), netstat(1M) or psrinfo(1M).

       Like /proc, lxproc can be mounted on any mount point, but the preferred
       mount  point  is	 /system/lxproc; if a zone brand elects to mount it by
       default, this will (or should) generally be the mount point.

       lxproc can be mounted with the command:

	 mount -F lxproc lxproc directory

       df(1M),	iostat(1M),  kstat(1M),	 mpstat(1M),  mount(1M),  netstat(1M),
       pargs(1),  pcred(1), pfiles(1), pflags(1), pldd(1), plimit(1), pmap(1),
       prstat(1M),  psig(1),  psrinfo(1M),   pstack(1),	  ptree(1),   pwdx(1),
       mount(2), umount(2), kstat(3KSTAT), proc(4), kstat(9S)

       When  choosing  between	offering  Linux	 compatibility and telling the
       truth, lxproc emphatically picks the truth.  A particular glaring exam‐
       ple of this is the Linux notion of "tasks" (that is, threads), which --
       due to historical misadventures on Linux -- allocate their  identifiers
       from the process identifier space.  (That is, each thread has in effect
       a pid.)	 Some  Linux  /proc  readers  have  come  to  depend  on  this
       attribute,  and become confused when threads appear with proper identi‐
       fiers, so lxproc simply opts for the pre-2.6  behavior,	and  does  not
       present the tasks directory at all.

				April 25, 2012			   LXPROC(7FS)

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