From aa118170543b580d50633fc738ee0d1636efb0af Mon Sep 17 00:00:00 2001
From: Ricardo Branco <rbranco@suse.de>
Date: Sun, 7 Jan 2024 16:57:26 +0100
Subject: [PATCH] Add C implementation for FreeBSD

---
 restartable.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 restartable.c

diff --git a/restartable.c b/restartable.c
new file mode 100644
index 0000000..8ca3cd4
--- /dev/null
+++ b/restartable.c
@@ -0,0 +1,73 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Ricardo Branco
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <err.h>
+#include <sys/types.h>
+#include <sys/user.h>
+#include <libutil.h>
+
+void
+print_proc(const struct kinfo_proc *kp) {
+	struct kinfo_vmentry *vmmap;
+	int i, count;
+
+	vmmap = kinfo_getvmmap(kp->ki_pid, &count);
+	if (vmmap == NULL && errno != EPERM)
+		err(1, "kinfo_getvmmap(): %d", kp->ki_pid);
+
+	for (i = 0; i < count; i++)
+		if (vmmap[i].kve_type == KVME_TYPE_VNODE && vmmap[i].kve_protection & VM_PROT_EXECUTE && vmmap[i].kve_path[0] == '\0')
+			printf("%d\t%d\t%d\t%s\t%s\n", kp->ki_pid, kp->ki_ppid, kp->ki_ruid, kp->ki_login, kp->ki_comm);
+
+	free(vmmap);
+}
+
+int
+print_all(void) {
+	struct kinfo_proc *procs;
+	int count;
+
+	procs = kinfo_getallproc(&count);
+	if (procs == NULL)
+		err(1, "kinfo_getallproc()");
+
+	for (int i = 0; i < count; i++)
+		print_proc(&procs[i]);
+
+	free(procs);
+	return 0;
+}
+
+int
+main(void) {
+	printf("PID\tPPID\tUID\tUser\tCommand\n");
+	exit(print_all() != 0);
+}