diff options
author | Todd C. Miller <millert@cvs.openbsd.org> | 2003-08-03 19:25:50 +0000 |
---|---|---|
committer | Todd C. Miller <millert@cvs.openbsd.org> | 2003-08-03 19:25:50 +0000 |
commit | d6064748efda9fa574e236e280d3afb43e41e655 (patch) | |
tree | 3264babbb4b73e7810883891e8348f02d4520704 /lib | |
parent | 998728a553fddc93a573c38d39ab8d5bfd45d762 (diff) |
Implement the WCONTINUED flag to the wait(2) family of syscalls and the
associated WIFCONTINUED macro as per 1003.1-2001. Adapted from FreeBSD.
A minor amount of trickiness is involved here. The value for WCONTINUED
is chosen in such a way that _WSTATUS(_WCONTINUED) == _WSTOPPED and the
WIFSTOPPED macro has been modified such that WIFSTOPPED(_WCONTINUED) !=
_WSTOPPED. This means we don't need to add an extra check to the
WIFSIGNALED and WIFSTOPPED macros. deraadt@ OK.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libc/sys/wait.2 | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/lib/libc/sys/wait.2 b/lib/libc/sys/wait.2 index c29be5dfd3d..a0575b0c4cd 100644 --- a/lib/libc/sys/wait.2 +++ b/lib/libc/sys/wait.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: wait.2,v 1.15 2003/06/02 20:18:39 millert Exp $ +.\" $OpenBSD: wait.2,v 1.16 2003/08/03 19:25:49 millert Exp $ .\" $NetBSD: wait.2,v 1.6 1995/02/27 12:39:37 cgd Exp $ .\" .\" Copyright (c) 1980, 1991, 1993, 1994 @@ -102,18 +102,23 @@ The .Fa options parameter contains the bitwise .Tn OR -of any of the following options. -The -.Dv WNOHANG -option is used to indicate that the call should not block if -there are no processes that wish to report status. -If the -.Dv WUNTRACED -option is set, children of the current process that are stopped due to a +of any of the following options: +.Bl -tag -width Ds +.It Dv WCONTINUED +Causes status to be reported for stopped child processes that have been +continued by receipt of a +.Dv SIGCONT +signal. +.It Dv WNOHANG +Indicates that the call should not block if there are no processes that wish +to report status. +.It Dv WUNTRACED +If set, children of the current process that are stopped due to a .Dv SIGTTIN , SIGTTOU , SIGTSTP , or .Dv SIGSTOP signal also have their status reported. +.El .Pp If .Fa rusage @@ -146,6 +151,12 @@ value of \-1. The following macros may be used to test the manner of exit of the process. One of the first three macros will evaluate to a non-zero (true) value: .Bl -tag -width Ds +.It Fn WIFCONTINUED status +True if the process has not terminated, and has continued after a job +control stop. +This macro can be true only if the wait call specified the +.Dv WCONTINUED +option). .It Fn WIFEXITED status True if the process terminated normally by a call to .Xr _exit 2 |