Date: Mon, 20 Jul 2026 20:20:16 +0000 From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 6dbeaf1afaba - main - ptrace.2: document PT_GET_CHILDREN Message-ID: <6a5e8300.19202.77ca66cb@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=6dbeaf1afaba52ba224f24773cbaac6317e11ff2 commit 6dbeaf1afaba52ba224f24773cbaac6317e11ff2 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2026-07-17 20:12:13 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2026-07-20 20:19:12 +0000 ptrace.2: document PT_GET_CHILDREN Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D58315 --- lib/libsys/ptrace.2 | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/lib/libsys/ptrace.2 b/lib/libsys/ptrace.2 index e1739a56e115..cedcf92cbef1 100644 --- a/lib/libsys/ptrace.2 +++ b/lib/libsys/ptrace.2 @@ -1044,6 +1044,61 @@ Result of the execution is returned in the member. Note that the request and its result do not affect the returned value from the currently executed syscall, if any. +.It Dv PT_GET_CHILDREN +Returns a report describing the children of the process specified by +.Fa pid . +Only children visible to the current thread are reported. +.Pp +If the +.Fa addr +argument is +.Dv NULL , +the instantaneous number of children is returned as +the result of the request. +.Pp +If the +.Fa addr +argument is not +.Dv NULL , +it must point to the array of +.Bd -literal +struct ptrace_child { + pid_t pid; + int flags; +}; +.Ed +elements. +The size of the array in bytes must be passed in +.Fa data . +The +.Dv PT_GET_CHILDREN +implementation fills the array and returns the number of elements filled. +.Pp +For each element, the +.Va pid +member contains the PID of the corresponding child. +The +.Va flags +member may have the following flags set: +.Bl -tag -width PTCHLD_TRACED_BY_ME +.It Dv PTCHLD_TRACED +The child specified by the +.Va pid +member is traced. +.It Dv PTCHLD_TRACED_BY_ME +The child specified by the +.Va pid +member is traced +by the caller (not the +process specified by the +.Fa pid +argument to the function). +.It Dv PTCHLD_EXITED +The child process is exiting or is a zombie. +.It Dv PTCHLD_ORPHAN +The child process is currently being debugged by a process other +than its parent process. +.El .El .Sh PT_COREDUMP and PT_SC_REMOTE usage The process must be stopped before dumping or initiating a remote system call.home | help
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