1 files changed, 31 insertions, 0 deletions
diff --git a/testModule/systemd_preserve_process_marker.c b/testModule/systemd_preserve_process_marker.c
new file mode 100644
index 00000000..172a5546
--- /dev/null
+++ b/testModule/systemd_preserve_process_marker.c
@@ -0,0 +1,31 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+void print_array(int argc, char *argv[]) {
+    // Helper function to print given array with given length.
+    int i = 0;
+    int j = 0;
+    for (i = 0; i < argc; i ++) {
+        j = 0;
+        while(argv[i][j] != '\0')
+            printf("%c", argv[i][j++]);
+        printf(" ");
+    }
+    printf("\n");
+}
+int main(int argc, char *argv[]) {
+    int count;
+    char **copy = malloc(sizeof(char *) * (argc-1));
+    for (count = 0; count < argc - 1; count++)
+        copy[count] = strdup(argv[count + 1]);
+    // Adding systemd indicator to preserve wrapped process during changing
+    // root filesystem. We mark wrapper and child process.
+    copy[0][0] = '@';
+    argv[0][0] = '@';
+    if (-1 == execvp(argv[1], copy)) {
+        perror("child process execve failed [%m]");
+        return -1;
+    }
+}