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.

3 files changed, 0 insertions, 150 deletions

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;
-}
diff --git a/src/io/io-uio.c b/src/io/io-uio.c
deleted file mode 100644
index dd9f873..0000000
--- a/src/io/io-uio.c
+++ /dev/null
@@ -1,41 +0,0 @@
-#include "io.h"
-#include <stdint.h>
-#include <err.h>
-#include <sys/uio.h>
-
-static size_t
-io_uio_do(const struct io *io, const void *ptr, const size_t offset, const size_t size, ssize_t (*iofun)(pid_t, const struct iovec*, unsigned long, const struct iovec*, unsigned long, unsigned long))
-{
-   const struct iovec lio = { .iov_base = (void*)ptr, .iov_len = size };
-   const struct iovec rio = { .iov_base = (void*)(intptr_t)offset, .iov_len = size };
-   return iofun(io->pid, &lio, 1, &rio, 1, 0);
-}
-
-static size_t
-io_uio_write(const struct io *io, const void *ptr, const size_t offset, const size_t size)
-{
-   const size_t ret = io_uio_do(io, ptr, offset, size, process_vm_writev);
-
-   if (ret == (size_t)-1)
-      warn("process_vm_writev(%u)", io->pid);
-
-   return (ret == (size_t)-1 ? 0 : ret);
-}
-
-static size_t
-io_uio_read(const struct io *io, void *ptr, const size_t offset, const size_t size)
-{
-   const size_t ret = io_uio_do(io, ptr, offset, size, process_vm_readv);
-
-   if (ret == (size_t)-1)
-      warn("process_vm_readv(%u)", io->pid);
-
-   return (ret == (size_t)-1 ? 0 : ret);
-}
-
-bool
-io_uio_init(struct io *io, const pid_t pid)
-{
-   *io = (struct io){ .pid = pid, .read = io_uio_read, .write = io_uio_write };
-   return true;
-}
diff --git a/src/io/io.h b/src/io/io.h
deleted file mode 100644
index 8a0639b..0000000
--- a/src/io/io.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#pragma once
-
-#include <stddef.h>
-#include <stdbool.h>
-#include <sys/types.h> // pid_t
-
-struct io {
-   void *backing;
-   size_t (*read)(const struct io *io, void *ptr, const size_t offset, const size_t size);
-   size_t (*write)(const struct io *io, const void *ptr, const size_t offset, const size_t size);
-   void (*cleanup)(struct io *io);
-   pid_t pid;
-};
-
-static inline void
-io_release(struct io *io)
-{
-   if (io->cleanup)
-      io->cleanup(io);
-   *io = (struct io){0};
-}
-
-bool
-io_uio_init(struct io *io, const pid_t pid);
-
-bool
-io_ptrace_init(struct io *io, const pid_t pid);