1 files changed, 95 insertions, 0 deletions
diff --git a/src/process_iterator_freebsd.c b/src/process_iterator_freebsd.c
new file mode 100644
index 0000000..eb6cfaa
--- /dev/null
+++ b/src/process_iterator_freebsd.c
@@ -0,0 +1,95 @@
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#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, _PATH_DEVNULL, NULL, O_RDONLY, 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_PROC, 0, &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 void kproc2proc(kvm_t *kd, struct kinfo_proc *kproc, struct process *proc)
+{
+	proc->pid = kproc->ki_pid;
+	proc->ppid = kproc->ki_ppid;
+	proc->cputime = kproc->ki_runtime / 1000;
+	proc->starttime = kproc->ki_start.tv_sec;
+	char **args = kvm_getargv(kd, kproc, sizeof(proc->command));
+	if (args != NULL)
+	{
+		memcpy(proc->command, args[0], strlen(args[0]) + 1);
+	}
+}
+
+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, &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)
+	{
+		get_single_process(it->kd, it->filter->pid, p);
+		it->i = it->count = 1;
+		return 0;
+	}
+	while (it->i < it->count)
+	{
+		struct kinfo_proc *kproc = &(it->procs[it->i]);
+		if (kproc->ki_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;
+}
+