From 75f9922f6d3c1e5bbbe7b90ca170392cc0f5efbc Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <mailroxas@gmail.com>
Date: Sun, 21 Oct 2018 16:23:23 +0300
Subject: Refactor io utils, add *-address-rw tools

Namespace io_ stuff into mem_io_ to be less likely to collision with
anything else. Add io-stream utility for working with streams instead of
direct buffers. Add address-rw tools for simple memory read/write, where
regions aren't needed.
---
 src/io/io-ptrace.c | 82 ------------------------------------------------------
 1 file changed, 82 deletions(-)
 delete mode 100644 src/io/io-ptrace.c

(limited to 'src/io/io-ptrace.c')

diff --git a/src/io/io-ptrace.c b/src/io/io-ptrace.c
deleted file mode 100644
index 50d0766..0000000
--- a/src/io/io-ptrace.c
+++ /dev/null
@@ -1,82 +0,0 @@
-#include "io.h"
-#include <stdio.h>
-#include <err.h>
-#include <sys/ptrace.h>
-#include <sys/wait.h>
-
-static size_t
-io_ptrace_do(const struct io *io, void *ptr, const size_t offset, const size_t size, size_t (*iofun)(void*, size_t, size_t, FILE*))
-{
-   if (fseek(io->backing, offset, SEEK_SET) != 0) {
-      warn("fseek(/proc/%u/mem, %zu)", io->pid, offset);
-      return 0;
-   }
-
-   return iofun(ptr, 1, size, io->backing);
-}
-
-static size_t
-io_ptrace_write(const struct io *io, const void *ptr, const size_t offset, const size_t size)
-{
-   clearerr(io->backing);
-   const size_t ret = io_ptrace_do(io, (void*)ptr, offset, size, (size_t(*)())fwrite);
-
-   if (ferror(io->backing))
-      warn("fwrite(/proc/%u/mem)", io->pid);
-
-   return ret;
-}
-
-static size_t
-io_ptrace_read(const struct io *io, void *ptr, const size_t offset, const size_t size)
-{
-   clearerr(io->backing);
-   const size_t ret = io_ptrace_do(io, ptr, offset, size, fread);
-
-   if (ferror(io->backing))
-      warn("fread(/proc/%u/mem)", io->pid);
-
-   return ret;
-}
-
-static void
-io_ptrace_cleanup(struct io *io)
-{
-   if (io->backing)
-      fclose(io->backing);
-
-   if (io->pid)
-      ptrace(PTRACE_DETACH, io->pid, 1, 0);
-}
-
-bool
-io_ptrace_init(struct io *io, const pid_t pid)
-{
-   *io = (struct io){ .pid = pid, .read = io_ptrace_read, .write = io_ptrace_write, .cleanup = io_ptrace_cleanup };
-
-   if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) == -1L) {
-      warn("ptrace(PTRACE_ATTACH, %u, NULL, NULL)", pid);
-      goto fail;
-   }
-
-   {
-      int status;
-      if (waitpid(pid, &status, 0) == -1 || !WIFSTOPPED(status)) {
-         warn("waitpid(%u) == %d", pid, status);
-         goto fail;
-      }
-   }
-
-   char path[128];
-   snprintf(path, sizeof(path), "/proc/%u/mem", pid);
-   if (!(io->backing = fopen(path, "w+b"))) {
-      warn("fopen(%s)", path);
-      goto fail;
-   }
-
-   return true;
-
-fail:
-   io->cleanup(io);
-   return false;
-}
-- 
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