Start adding a basic /proc filesystem and a "ps" utility.

Author: https://github.com/awesomekling
Commit: ed2422d7af

Userland/ps.cpp

@@ -0,0 +1,25 @@
+#include <LibC/stdio.h>
+#include <LibC/unistd.h>
+
+int main(int c, char** v)
+{
+    int fd = open("/proc/summary");
+    if (fd == -1) {
+        printf("failed to open /proc/summary :(\n");
+        return 1;
+    }
+    for (;;) {
+        char buf[16];
+        ssize_t nread = read(fd, buf, sizeof(buf));
+        if (nread == 0)
+            break;
+        if (nread < 0) {
+            printf("failed to read :(\n");
+            return 2;
+        }
+        for (ssize_t i = 0; i < nread; ++i) {
+            putchar(buf[i]);
+        }
+    }
+    return 0;
+}