AnonymousFox

//opt/alt/ruby18/share/ri/1.8/system/Process/waitpid-c.yaml

--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
 body: "Waits for a child process to exit, returns its process id, and sets <tt>$?</tt> to a <tt>Process::Status</tt> object containing information on that process. Which child it waits on depends on the value of pid:"
- !ruby/object:SM::Flow::LIST 
 contents: 
 - !ruby/struct:SM::Flow::LI 
 label: "> 0:"
 body: Waits for the child whose process ID equals pid.
 - !ruby/struct:SM::Flow::LI 
 label: "0:"
 body: Waits for any child whose process group ID equals that of the calling process.
 - !ruby/struct:SM::Flow::LI 
 label: "-1:"
 body: Waits for any child process (the default if no pid is given).
 - !ruby/struct:SM::Flow::LI 
 label: "< -1:"
 body: Waits for any child whose process group ID equals the absolute value of pid.
 type: :NOTE
- !ruby/struct:SM::Flow::P 
 body: The flags argument may be a logical or of the flag values <tt>Process::WNOHANG</tt> (do not block if no child available) or <tt>Process::WUNTRACED</tt> (return stopped children that haven't been reported). Not all flags are available on all platforms, but a flag value of zero will work on all platforms.
- !ruby/struct:SM::Flow::P 
 body: Calling this method raises a <tt>SystemError</tt> if there are no child processes. Not available on all platforms.
- !ruby/struct:SM::Flow::VERB 
 body: " include Process\n fork { exit 99 } #=&gt; 27429\n wait #=&gt; 27429\n $?.exitstatus #=&gt; 99\n\n pid = fork { sleep 3 } #=&gt; 27440\n Time.now #=&gt; Wed Apr 09 08:57:09 CDT 2003\n waitpid(pid, Process::WNOHANG) #=&gt; nil\n Time.now #=&gt; Wed Apr 09 08:57:09 CDT 2003\n waitpid(pid, 0) #=&gt; 27440\n Time.now #=&gt; Wed Apr 09 08:57:12 CDT 2003\n"
full_name: Process::waitpid
is_singleton: true
name: waitpid
params: |
 Process.wait() => fixnum
 Process.wait(pid=-1, flags=0) => fixnum
 Process.waitpid(pid=-1, flags=0) => fixnum

visibility: public