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  12 .\" Copyright 2015 Joyent, Inc.
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  14 .Dd May 11, 2016
  15 .Dt PSYNC 3PROC
  16 .Os
  17 .Sh NAME
  18 .Nm Psync ,
  19 .Nm Lsync
  20 .Nd synchronize cached tracing flags and modifications
  21 .Sh SYNOPSIS
  22 .Lb libproc
  23 .In libproc.h
  24 .Ft void
  25 .Fo Psync
  26 .Fa "struct ps_prochandle *P"
  27 .Fc
  28 .Ft void
  29 .Fo Lsync
  30 .Fa "struct ps_lwphandle *L"
  31 .Fc
  32 .Sh DESCRIPTION
  33 The
  34 .Fn Psync
  35 function synchronizes modifications to the process handle
  36 .Fa P
  37 back to the underlying active process.
  38 The
  39 .Fn Psync
  40 function ensures that any outstanding process holds, register
  41 modifications, signal injections, and modifications to the various fault
  42 and system call tracing flags are taken care of.
  43 .Pp
  44 Normally this function is not required as other library routines take
  45 care of synchronizing this state out to the process when it is required.
  46 If the underlying /proc file system routines are used outside of the
  47 library, calling this function may be required.
  48 .Pp
  49 The
  50 .Fn Psync
  51 function is only meaningful for active processes.
  52 It will do nothing on process handles that refer to core files, zombie
  53 processes, and ELF objects.
  54 .Pp
  55 The
  56 .Fn Lsync
  57 function is equivalent to the
  58 .Fn Psync
  59 function, except rather than operating on the entire process and its
  60 representative thread, it instead operates on the thread handle
  61 .Fa L .
  62 .Sh INTERFACE STABILITY
  63 .Sy Uncommitted
  64 .Sh MT-LEVEL
  65 See
  66 .Sy LOCKING
  67 in
  68 .Xr libproc 3LIB .
  69 .Sh SEE ALSO
  70 .Xr libproc 3LIB ,
  71 .Xr Pfault 3PROC ,
  72 .Xr Pputareg 3PROC ,
  73 .Xr Psetfault 3PROC ,
  74 .Xr Psetsignal 3PROC ,
  75 .Xr Psetsysentry 3PROC ,
  76 .Xr Psetsysexit 3PROC ,
  77 .Xr Psignal 3PROC ,
  78 .Xr Psysentry 3PROC ,
  79 .Xr Psysexit 3PROC ,
  80 .Xr proc 4