From 5221ce1b7ce6170070c350d50b95ed893d795a09 Mon Sep 17 00:00:00 2001
From: anthk <anthk@texto-plano.xyz>
Date: Wed, 3 Feb 2021 19:30:05 +0000
Subject: openbsd support

---
 src/process_iterator_openbsd.c | 114 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 src/process_iterator_openbsd.c

diff --git a/src/process_iterator_openbsd.c b/src/process_iterator_openbsd.c
new file mode 100644
index 0000000..d6f1206
--- /dev/null
+++ b/src/process_iterator_openbsd.c
@@ -0,0 +1,114 @@
+/**
+ *
+ * cpulimit - a CPU limiter for Linux
+ *
+ * Copyright (C) 2005-2012, by:  Angelo Marletta <angelo dot marletta at gmail dot com> 
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <fcntl.h>
+#include <paths.h>
+int init_process_iterator(struct process_iterator *it, struct process_filter *filter) {
+	char errbuf[_POSIX2_LINE_MAX];
+	it->i = 0;
+	/* Open the kvm interface, get a descriptor */
+	if ((it->kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf)) == NULL) {
+		fprintf(stderr, "kvm_open: %s\n", errbuf);
+		return -1;
+	}
+	/* Get the list of processes. */
+	if ((it->procs = kvm_getprocs(it->kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &it->count)) == NULL) {
+		kvm_close(it->kd);
+//		fprintf(stderr, "kvm_getprocs: %s\n", kvm_geterr(it->kd));
+		return -1;
+	}
+	it->filter = filter;
+	return 0;
+}
+static int kproc2proc(kvm_t *kd, struct kinfo_proc *kproc, struct process *proc)                  {
+  proc->pid = kproc->p_pid;
+	proc->ppid = kproc->p_ppid;
+	proc->cputime = ( kproc->p_uutime_sec + kproc->p_ustime_sec ) / 1000000  ;
+	proc->starttime = kproc->p_ustart_sec;
+	char **args = kvm_getargv(kd, kproc, sizeof(proc->command));
+	if (args == NULL) return -1;
+	memcpy(proc->command, args[0], strlen(args[0]) + 1);
+	return 0;
+}
+
+static int get_single_process(kvm_t *kd, pid_t pid, struct process *process)
+{
+	int count;
+	struct kinfo_proc *kproc = kvm_getprocs(kd, KERN_PROC_PID, pid, sizeof(struct kinfo_proc),  &count);
+	if (count == 0 || kproc == NULL)
+	{
+//		fprintf(stderr, "kvm_getprocs: %s\n", kvm_geterr(kd));
+		return -1;
+	}
+	kproc2proc(kd, kproc, process);
+	return 0;
+}
+
+int get_next_process(struct process_iterator *it, struct process *p) {
+	if (it->i == it->count)
+	{
+		return -1;
+	}
+	if (it->filter->pid != 0 && !it->filter->include_children)
+	{
+		if (get_single_process(it->kd, it->filter->pid, p) != 0)
+		{
+			it->i = it->count = 0;
+			return -1;
+		}
+		it->i = it->count = 1;
+		return 0;
+	}
+	while (it->i < it->count)
+	{
+		struct kinfo_proc *kproc = &(it->procs[it->i]);
+		if (kproc->p_flag & P_SYSTEM)
+		{
+			// skip system processes
+			it->i++;
+			continue;
+		}
+		if (it->filter->pid != 0 && it->filter->include_children)
+		{
+			kproc2proc(it->kd, kproc, p);
+			it->i++;
+			if (p->pid != it->filter->pid && p->ppid != it->filter->pid)
+				continue;
+			return 0;
+		}
+		else if (it->filter->pid == 0)
+		{
+			kproc2proc(it->kd, kproc, p);
+			it->i++;
+			return 0;
+		}
+	}
+	return -1;
+}
+
+int close_process_iterator(struct process_iterator *it) {
+	if (kvm_close(it->kd) == -1) {
+		fprintf(stderr, "kvm_getprocs: %s\n", kvm_geterr(it->kd));
+		return -1;
+	}
+	return 0;
+}
+
-- 
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