diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-12-27 00:58:17 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2020-12-27 01:01:57 +0100 |
| commit | b9fe5b6eadc913ead80531905aeafa51ed0d4ccd (patch) | |
| tree | 92866f4a59fe8c852f9ab10611acc63e47e56fa9 /hurd | |
| parent | d7964b08211f5221e73400ed36093d44f9455fff (diff) | |
Add proc_waitid
proc_wait assumes that the caller always wants WEXITED, but waitid()
does not. The new proc_waitid RPC requires the caller to specify at
least one of WEXITED, WSTOPPED, or WCONTINUED.
* hurd/process.defs (proc_waitid): New RPC.
* hurd/process_reply.defs (proc_waitid): New RPC.
* hurd/process_request.defs (proc_waitid): New RPC.
* proc/proc.h (struct proc): Add p_continued field.
* proc/wait.c (WCONTINUED, WEXITED): Define if not already defined.
(S_proc_wait): Rename implementation to S_proc_waitid, and modify to
stop assuming WEXITED. Add support for WCONTINUED.
(S_proc_wait): Reimplement by just calling S_proc_waitid with an
additional WEXITED.
(proc_mark_stop): Clear p_continued.
(proc_mark_cont): Set p_continued, clear p_waited, wake any waiting
parent.
Diffstat (limited to 'hurd')
| -rw-r--r-- | hurd/process.defs | 17 | ||||
| -rw-r--r-- | hurd/process_reply.defs | 2 | ||||
| -rw-r--r-- | hurd/process_request.defs | 2 |
3 files changed, 21 insertions, 0 deletions
diff --git a/hurd/process.defs b/hurd/process.defs index d515a46d..3b091290 100644 --- a/hurd/process.defs +++ b/hurd/process.defs @@ -434,3 +434,20 @@ routine proc_set_entry ( routine proc_get_entry ( process: process_t; out entry: vm_address_t); + +/* Wait for a child process to exit. If pid is zero, it waits for any + child in the same pgrp as the parent. If pid is -1, it waits for + any child. Otherwise, if pid is negative, it waits for any process + in the specified process group. If pid is positive, it waits for + the specified process. The exit status and resource usage of the + process are returned in status and rusage respectively. + options must specify at least one of WEXITED, WSTOPPED, or WCONTINUED. */ +routine proc_waitid ( + process: process_t; + sreplyport reply_port: sreply_port_t; + pid: pid_t; + options: int; + out status: int; + out sigcode: int; + out rusage: rusage_t; + out pid_status: pid_t); diff --git a/hurd/process_reply.defs b/hurd/process_reply.defs index 2eefcc37..4a79024c 100644 --- a/hurd/process_reply.defs +++ b/hurd/process_reply.defs @@ -200,3 +200,5 @@ skip; /* proc_get_exe */ skip; /* proc_set_entry */ skip; /* proc_get_entry */ + +skip; /* proc_waitid */ diff --git a/hurd/process_request.defs b/hurd/process_request.defs index fc9127ab..f200bf15 100644 --- a/hurd/process_request.defs +++ b/hurd/process_request.defs @@ -423,3 +423,5 @@ skip; /* proc_get_exe */ skip; /* proc_set_entry */ skip; /* proc_get_entry */ + +skip; /* proc_waitid */ |