commit 0e3d59f4471fa4567cee8f913cda910430af36e4
Author: Andre Heber <a.heber@sabienzia.com>
Date:   Sat Nov 25 13:09:16 2023 +0100

    main loop

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3f8c2ec
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+main
+target
+
+main.dSYM/
+target.dSYM/
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diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5db2103
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "linenoise"]
+	path = linenoise
+	url = https://github.com/antirez/linenoise.git
diff --git a/compile.sh b/compile.sh
new file mode 100644
index 0000000..15ad5f6
--- /dev/null
+++ b/compile.sh
@@ -0,0 +1,5 @@
+# Compile the debugger
+gcc -g -o main -I./include -I./linenoise main.c src/debugger.c linenoise/linenoise.c
+
+# Compile the test program
+gcc -g -o target target.c
diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..ca8525b
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,4 @@
+-std=gnu11
+-I./include
+-I./linenoise
+ca
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diff --git a/include/debugger.h b/include/debugger.h
new file mode 100644
index 0000000..cc97a30
--- /dev/null
+++ b/include/debugger.h
@@ -0,0 +1,8 @@
+#include <sys/_types/_pid_t.h>
+
+typedef struct debugger_s debugger_t;
+
+debugger_t *debugger_create(char *program_name, pid_t pid);
+void debugger_destroy(debugger_t *debugger);
+
+void debugger_run(debugger_t *debugger);
\ No newline at end of file
diff --git a/linenoise b/linenoise
new file mode 160000
index 0000000..93b2db9
--- /dev/null
+++ b/linenoise
@@ -0,0 +1 @@
+Subproject commit 93b2db9bd4968f76148dd62cdadf050ed50b84b3
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..2e97bc3
--- /dev/null
+++ b/main.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ptrace.h>
+
+#include "debugger.h"
+
+int main(int argc, char* argv[]) {
+	if (argc < 2) {
+		printf("Usage: %s <filename>\n", argv[0]);
+		return 1;
+	}
+
+	char * prog = argv[1];
+
+	int pid = fork();
+	if (pid == 0) {
+		// child
+		ptrace(PT_TRACE_ME, 0, NULL, 0);
+		execl(prog, prog, NULL);
+	} else {
+		// parent
+		printf("Started debugging %s with pid %d\n", prog, pid);
+		debugger_t *dbg = debugger_create(prog, pid);
+		debugger_run(dbg);
+	}
+
+	exit(0);
+}
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diff --git a/src/debugger.c b/src/debugger.c
new file mode 100644
index 0000000..15cc423
--- /dev/null
+++ b/src/debugger.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/_types/_pid_t.h>
+
+#include "linenoise.h"
+
+typedef struct debugger_s {
+	char * program_name;
+	pid_t pid;
+} debugger_t;
+
+debugger_t *debugger_create(char *program_name, pid_t pid) {
+	debugger_t *debugger = malloc(sizeof(debugger_t));
+	debugger->program_name = program_name;
+	debugger->pid = pid;
+	return debugger;
+}
+
+
+static void debugger_handle_command(debugger_t *debugger, char *line) {
+	printf("Command: %s\n", line);
+}
+
+void debugger_run(debugger_t *debugger) {
+	int wait_status;
+	int options = 0;
+	waitpid(debugger->pid, &wait_status, options);
+
+	char *line = NULL;
+		while ((line = linenoise("dbg> ")) != NULL) {
+			debugger_handle_command(debugger, line);
+			linenoiseHistoryAdd(line);
+			linenoiseFree(line);
+	};
+}
+
+void debugger_destroy(debugger_t *debugger) {
+	free(debugger);
+}
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diff --git a/target.c b/target.c
new file mode 100644
index 0000000..3953f59
--- /dev/null
+++ b/target.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	printf("Hello, world!\n");
+	return 0;
+}
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