skeletton untested project

2025-12-11 06:18:16 +01:00 · 2025-12-11 06:18:16 +01:00 · 6fc620e8f4
commit 6fc620e8f4
187 changed files with 6584 additions and 0 deletions
--- a/srcs/main.c
+++ b/srcs/main.c
@ -0,0 +1,110 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   main.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/12/11 04:07:30 by thrieg            #+#    #+#             */
+/*   Updated: 2025/12/11 04:59:32 by thrieg           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../includes/ft_strace.h"
+
+int main_loop(size_t binary_type)
+{
+    int in_syscall = 0;
+    while (1) {
+        // Ask kernel to run until next syscall or signal
+        if (ptrace(PTRACE_SYSCALL, pid, 0, 0) == -1) break;
+
+        int status;
+        if (waitpid(pid, &status, 0) == -1) break;
+
+        if (WIFEXITED(status)) {
+            // child exited normally
+            printf("+++ exited with %d +++\n", WEXITSTATUS(status));
+            break;
+        }
+        if (WIFSIGNALED(status)) {
+            // killed by a signal
+            printf("+++ killed by %s +++\n", strsignal(WTERMSIG(status)));
+            break;
+        }
+        if (!WIFSTOPPED(status))
+            continue;
+
+        int sig = WSTOPSIG(status);
+
+        if (sig == (SIGTRAP | 0x80)) {
+            // syscall-enter or syscall-exit
+            if (!in_syscall) {
+                // ENTRY
+                read_regs_and_print_entry(pid);
+                in_syscall = 1;
+            } else {
+                // EXIT
+                read_regs_and_print_exit(pid);
+                in_syscall = 0;
+            }
+        } else {
+            // A real signal: print it, then let it continue
+            print_signal(pid, sig);
+            // pass down the signal to the actual program
+            if (ptrace(PTRACE_SYSCALL, pid, 0, sig) == -1) break;
+            waitpid(pid, &status, 0);
+        }
+    }
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 2)
+    {
+        dprintf(2, "usage: %s <path/to/program> <arg1> <arg2> ...\n", argv[0]);
+        return (EXIT_FAILURE);
+    }
+
+    //determine if this file is an executable, and if so, 64 or 32 bits
+    ssize_t binary_bits = binary_type(argv[1]);
+    if (binary_bits < 0)
+    {
+        if (binary_bits == -1)
+        {
+            dprintf(2, "couldn't read that file, make sure you have the read and execute permissions on %s\n", argv[1]);
+        }
+        else if (binary_bits == -2)
+        {
+            dprintf(2, "%s is not a supported binary\n", argv[1]);
+        }
+        return (EXIT_FAILURE);
+    }
+
+    pid_t pid = fork();
+
+    if (pid == 0) {
+        execvp(argv[1], argv + 1);
+        perror("execvp");
+        return (EXIT_FAILURE);
+    }
+    else {
+        // 1) Seize the child
+        if (ptrace(PTRACE_SEIZE, pid, 0, 0) == -1) perror("PTRACE_SEIZE");
+
+        // 2) Interrupt it to force a stop
+        if (ptrace(PTRACE_INTERRUPT, pid, 0, 0) == -1) perror("PTRACE_INTERRUPT");
+
+        // 3) Wait for it to stop
+        int status;
+        waitpid(pid, &status, 0);
+
+        // 4) Set options
+        long opts = PTRACE_O_TRACESYSGOOD;
+        ptrace(PTRACE_SETOPTIONS, pid, 0, opts);
+
+        // 5) Enter main trace loop
+        return (main_loop((size_t)binary_bits));
+    }
+    return (EXIT_SUCCESS);
+}