From 7a2e313a2070e314b8bfe5e50c138e4c2b142bf0 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Wed, 12 Oct 2022 18:04:27 +0200
Subject: [PATCH] init: demo execv()

---
 apps/Makefile   |  2 +-
 apps/src/init.c | 12 +++++++++++-
 apps/src/sym.c  | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 apps/src/sym.c

diff --git a/apps/Makefile b/apps/Makefile
index c27455de..97187f7e 100644
--- a/apps/Makefile
+++ b/apps/Makefile
@@ -1,4 +1,4 @@
-APPS := init
+APPS := init sym
 
 APPS_DIR := $(LUNA_ROOT)/apps
 APPS_SRC := $(APPS_DIR)/src
diff --git a/apps/src/init.c b/apps/src/init.c
index 9360023f..a6774a03 100644
--- a/apps/src/init.c
+++ b/apps/src/init.c
@@ -117,7 +117,17 @@ int main()
 
     if (fclose(config) < 0) { perror("fclose"); }
 
-    printf("\n\nPress any key to restart.\n");
+    sleep(2);
+
+    printf("\n\nPress any key to restart.\n\n");
+
+    sleep(2);
+
+    if (execv("/bin/sym", NULL) < 0)
+    {
+        perror("execv");
+        return 1;
+    }
 
     return 0;
 }
diff --git a/apps/src/sym.c b/apps/src/sym.c
new file mode 100644
index 00000000..d5ed3927
--- /dev/null
+++ b/apps/src/sym.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <string.h>
+
+int main()
+{
+    FILE* syms = fopen("/sys/moon.sym", "r");
+    if (!syms)
+    {
+        perror("fopen");
+        return 1;
+    }
+
+    char buf[1025];
+
+    if (fseek(syms, 8000, SEEK_SET) < 0)
+    {
+        perror("fseek");
+        return 1;
+    }
+
+    size_t nread = fread(buf, 1024, 1, syms);
+    if (ferror(syms))
+    {
+        perror("fread");
+        return 1;
+    }
+
+    buf[nread] = 0;
+
+    printf("%s\n", strchr(buf, '\n') + 1);
+
+    fclose(syms);
+
+    return 0;
+}
\ No newline at end of file