compat-43/sigpause.2

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  32 .\"     @(#)sigpause.2  8.1 (Berkeley) 6/2/93
  33 .\" $FreeBSD: src/lib/libc/compat-43/sigpause.2,v 1.5.2.5 2001/12/14 18:33:49 ru Exp $
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  35 .Dd June 2, 1993
  36 .Dt SIGPAUSE 2
  37 .Os
  38 .Sh NAME
  39 .Nm sigpause
  40 .Nd atomically release blocked signals and wait for interrupt
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In signal.h
  45 .Ft int
  46 .Fn sigpause "int sig"
  47 .Sh DESCRIPTION
  48 .Sy This interface is made obsolete by
  49 .Xr sigsuspend 2 .
  50 .Pp
  51 .Fn Sigpause
  52 assigns
  53 .Fa sig
  54 to the set of masked signals
  55 and then waits for a signal to arrive;
  56 on return the set of masked signals is restored.
  57 .Fa Sig
  58 is usually 0, indicating that no
  59 signals are to be blocked.
  60 .Fn Sigpause
  61 always terminates by being interrupted, returning -1 with
  62 .Va errno
  63 set to
  64 .Er EINTR .
  65 .Sh COMPATIBILITY
  66 .Fn sigpause
  67 now takes a signal value and not a mask.
  68 This often appears as a hang in sigpause$UNIX2003
  69 or with
  70 .Fn sigpause
  71 returning with
  72 .Va errno
  73 set to EINVAL.
  74 Use
  75 .Fn sigsuspend
  76 with signal masks.
  77 .Sh SEE ALSO
  78 .Xr kill 2 ,
  79 .Xr sigaction 2 ,
  80 .Xr sigblock 2 ,
  81 .Xr sigprocmask 2 ,
  82 .Xr sigsuspend 2 ,
  83 .Xr sigvec 2
  84 .Sh HISTORY
  85 The
  86 .Fn sigpause
  87 function call appeared in
  88 .Bx 4.2
  89 and has been deprecated.