src/lib/libproc/proc_util.c, branch releng/14.3

Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:42+00:00

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

proc_detach: use ptrace(PT_KILL) to kill the tracee

2023-08-01T17:28:50+00:00

When MFC'ing commit dad11f990e2 to stable/12, the child would dump core
when dtrace exited.  It was getting SIGTRAP, even though proc_detach
sent a SIGKILL.  I could not find the reason for this difference in
behavior from main (and stable/13).  The present change, however, works
as expected, probably due the proc_wkilled special case in kern_ptrace.
It also seems like a more obvious approach.

While I'm here, fix two other issues in the previous code:

It would SIGKILL a tracee even in read-only mode.

It would SIGSTOP/SIGCONT the tracee if ptrace succeeded but errno happened
to be EBUSY for some other reason.

Reviewed by:	markj
MFC after:	1 week
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D41122

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

2023-05-12T16:44:03+00:00

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:		pfg
MFC After:		3 days
Sponsored by:		Netflix

lib: further adoption of SPDX licensing ID tags.

2017-11-26T02:00:33+00:00

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

libproc: Add support for some proc_attach() flags.

2016-12-06T04:22:38+00:00

This change adds some handling for the equivalent of Solaris' PGRAB_*
flags. In particular, support for PGRAB_RDONLY is needed to avoid a
nasty deadlock: dtrace(1) may otherwise stop the master process for its
pseudo-terminal and end up blocking while writing to standard output.

libproc: Make proc_getpid() an accessor for struct proc_handle.

2016-12-06T04:14:20+00:00

This allows librtld_db to fetch the PID from a handle without calling into
libproc. Together with r303531, this means that librtld_db no longer
references symbols from libproc.

Fix style bugs and remove trailing whitespace in libproc and librtld_db.

2016-12-06T04:13:02+00:00

MFC after:	1 week

libproc: Add proc_getmodel().

2016-07-30T03:09:23+00:00

This is used by libdtrace to determine the data model of target processes.
This allows for the creation of pid provider probes in 32-bit processes on
amd64.

MFC after:	1 month

If the traced process stops because it received a signal, libproc needs

2014-05-04T03:34:32+00:00

to ensure that the signal is forwarded when proc_continue() is called.

MFC after:	3 weeks

Revert r257248 and fix the problem in a way that doesn't violate style(9).

2013-10-29T03:12:31+00:00

Suggested by:	jmg