From 5e21196a9c7ee8eee921d74f6b5eef2f1980ec97 Mon Sep 17 00:00:00 2001
From: Louis Burda <quent.burda@gmail.com>
Date: Thu, 26 Jan 2023 04:24:19 +0100
Subject: Basic qemu eviction test with signalled stepping and added rip
 syscall

---
 test/util.c | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

(limited to 'test/util.c')

diff --git a/test/util.c b/test/util.c
index 8b27578..11cba55 100644
--- a/test/util.c
+++ b/test/util.c
@@ -2,8 +2,10 @@
 
 #include "test/util.h"
 
-#include <pthread.h>
+#include <sys/types.h>
 #include <sys/mman.h>
+#include <dirent.h>
+#include <pthread.h>
 #include <err.h>
 #include <sched.h>
 #include <string.h>
@@ -69,6 +71,41 @@ read_stat_core(pid_t pid)
 	return cpu;
 }
 
+pid_t
+pgrep(const char *bin)
+{
+	char path[PATH_MAX];
+	char buf[PATH_MAX];
+	struct dirent *ent;
+	char *cmp;
+	FILE *f;
+	DIR *dir;
+	pid_t pid;
+
+	dir = opendir("/proc");
+	if (!dir) err(1, "opendir");
+
+	pid = 0;
+	while (!pid && (ent = readdir(dir))) {
+		snprintf(path, sizeof(path), "/proc/%s/cmdline", ent->d_name);
+		f = fopen(path, "rb");
+		if (!f) continue;
+		memset(buf, 0, sizeof(buf));
+		fread(buf, 1, sizeof(buf), f);
+		if ((cmp = strrchr(buf, '/')))
+			cmp += 1;
+		else
+			cmp = buf;
+		if (!strcmp(cmp, bin))
+			pid = atoi(ent->d_name);
+		fclose(f);
+	}
+
+	closedir(dir);
+
+	return pid;
+}
+
 void
 print_counts(uint8_t *counts)
 {
-- 
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