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PATH: opt / alt / ruby18 / share / ri / 1.8 / system / Process

--- !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

[-] groups-c.yaml [edit]
[-] groups%3d-c.yaml [edit]
[-] initgroups-c.yaml [edit]
[-] waitpid2-c.yaml [edit]
[-] exit-c.yaml [edit]
[-] maxgroups%3d-c.yaml [edit]
[+] Status
[-] maxgroups-c.yaml [edit]
[-] wait2-c.yaml [edit]
[-] waitpid-c.yaml [edit]
[-] exec-c.yaml [edit]
[+] GID
[-] egid-c.yaml [edit]
[-] exit%21-c.yaml [edit]
[+] UID
[-] setpriority-c.yaml [edit]
[-] gid%3d-c.yaml [edit]
[-] wait-c.yaml [edit]
[-] egid%3d-c.yaml [edit]
[-] fork-c.yaml [edit]
[-] setpgrp-c.yaml [edit]
[-] detach-c.yaml [edit]
[-] kill-c.yaml [edit]
[-] ppid-c.yaml [edit]
[-] getpgrp-c.yaml [edit]
[+] Sys
[-] times-c.yaml [edit]
[-] abort-c.yaml [edit]
[-] euid-c.yaml [edit]
[-] setsid-c.yaml [edit]
[-] euid%3d-c.yaml [edit]
[+] ..
[-] setpgid-c.yaml [edit]
[-] getpriority-c.yaml [edit]
[-] pid-c.yaml [edit]
[-] uid%3d-c.yaml [edit]
[-] uid-c.yaml [edit]
[-] cdesc-Process.yaml [edit]
[-] waitall-c.yaml [edit]
[-] getpgid-c.yaml [edit]
[-] getrlimit-c.yaml [edit]
[-] gid-c.yaml [edit]
[-] setrlimit-c.yaml [edit]