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Merge 49a5b3ff692f784d4655afa35cb71ecd9faa93a4 into 598f1826d8b2bc969aace2c6459824737667218c

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0x4C33 2026-03-20 21:26:52 -07:00 committed by GitHub
commit 028cff3666
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1 changed files with 27 additions and 2 deletions
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29
src/agents/sandbox/fs-bridge-mutation-helper.ts
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@ -87,12 +87,21 @@ export const SANDBOX_PINNED_MUTATION_PYTHON = [
" temp_name = None",
" try:",
" temp_name, temp_fd = create_temp_file(parent_fd, basename)",
" total_written = 0",
" while True:",
" chunk = stdin_buffer.read(65536)",
" if not chunk:",
" break",
" os.write(temp_fd, chunk)",
" written = os.write(temp_fd, chunk)",
" if written != len(chunk):",
" raise OSError(errno.EIO, 'short write to sandbox temp file: wrote ' + str(written) + ' of ' + str(len(chunk)) + ' bytes (fakeowner or network fs may be dropping writes)', basename)",
" total_written += written",
" os.fsync(temp_fd)",
" # Verify the kernel flushed the correct number of bytes.",
" # On fakeowner/network mounts, os.write can return success but discard data.",
" stat_result = os.fstat(temp_fd)",
" if stat_result.st_size != total_written:",
" raise OSError(errno.EIO, 'sandbox temp file size mismatch after write: expected ' + str(total_written) + ' bytes but got ' + str(stat_result.st_size) + ' (fakeowner or network fs may be silently dropping writes)', basename)",
" os.close(temp_fd)",
" temp_fd = None",
" os.replace(temp_name, basename, src_dir_fd=parent_fd, dst_dir_fd=parent_fd)",
@ -137,6 +146,14 @@ export const SANDBOX_PINNED_MUTATION_PYTHON = [
" try:",
" for child in os.listdir(src_dir_fd):",
" move_entry(src_dir_fd, child, temp_dir_fd, child)",
" except Exception:",
" # Rollback: move children from temp_dir back to source to preserve original tree.",
" # Without this, a size-check failure on a later child leaves earlier children stranded",
" # in the hidden temp dir and the source partially deleted.",
" for child in os.listdir(temp_dir_fd):",
" move_entry(temp_dir_fd, child, src_dir_fd, child)",
" remove_tree(dst_parent_fd, temp_dir_name)",
" raise",
" finally:",
" os.close(src_dir_fd)",
" os.close(temp_dir_fd)",
@ -161,16 +178,24 @@ export const SANDBOX_PINNED_MUTATION_PYTHON = [
" temp_name = None",
" try:",
" temp_name, temp_fd = create_temp_file(dst_parent_fd, dst_basename)",
" total_written = 0",
" while True:",
" chunk = os.read(src_fd, 65536)",
" if not chunk:",
" break",
" os.write(temp_fd, chunk)",
" written = os.write(temp_fd, chunk)",
" if written != len(chunk):",
" raise OSError(errno.EIO, 'short write to sandbox temp file: wrote ' + str(written) + ' of ' + str(len(chunk)) + ' bytes (fakeowner or network fs may be dropping writes)', dst_basename)",
" total_written += written",
" try:",
" os.fchmod(temp_fd, stat.S_IMODE(src_stat.st_mode))",
" except AttributeError:",
" pass",
" os.fsync(temp_fd)",
" # Verify bytes were actually persisted — fakeowner/network mounts can silently drop writes.",
" stat_result = os.fstat(temp_fd)",
" if stat_result.st_size != total_written:",
" raise OSError(errno.EIO, 'sandbox temp file size mismatch after write: expected ' + str(total_written) + ' bytes but got ' + str(stat_result.st_size) + ' (fakeowner or network fs may be silently dropping writes)', dst_basename)",
" os.close(temp_fd)",
" temp_fd = None",
" os.replace(temp_name, dst_basename, src_dir_fd=dst_parent_fd, dst_dir_fd=dst_parent_fd)",