Extract functions from compat.c and util.h into a new fs library

1 files changed, 100 insertions, 0 deletions

diff --git a/src/lib/fs/files.h b/src/lib/fs/files.h
new file mode 100644
index 0000000000..be4ec485f1
--- /dev/null
+++ b/src/lib/fs/files.h
@@ -0,0 +1,100 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_FS_H
+#define TOR_FS_H
+
+#include "lib/cc/compat_compiler.h"
+#include "lib/cc/torint.h"
+#include "lib/testsupport/testsupport.h"
+
+#include <stddef.h>
+#include <stdio.h>
+
+#ifdef _WIN32
+/* We need these for struct stat to work */
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+#ifndef O_TEXT
+#define O_TEXT 0
+#endif
+#ifndef O_NOFOLLOW
+#define O_NOFOLLOW 0
+#endif
+
+struct stat;
+
+int tor_open_cloexec(const char *path, int flags, unsigned mode);
+FILE *tor_fopen_cloexec(const char *path, const char *mode);
+int tor_rename(const char *path_old, const char *path_new);
+
+int replace_file(const char *from, const char *to);
+int touch_file(const char *fname);
+
+MOCK_DECL(int,tor_unlink,(const char *pathname));
+
+/** Return values from file_status(); see that function's documentation
+ * for details. */
+typedef enum { FN_ERROR, FN_NOENT, FN_FILE, FN_DIR, FN_EMPTY } file_status_t;
+
+file_status_t file_status(const char *filename);
+
+int64_t tor_get_avail_disk_space(const char *path);
+
+ssize_t write_all_to_fd(int fd, const char *buf, size_t count);
+ssize_t read_all_from_fd(int fd, char *buf, size_t count);
+
+#define OPEN_FLAGS_REPLACE (O_WRONLY|O_CREAT|O_TRUNC)
+#define OPEN_FLAGS_APPEND (O_WRONLY|O_CREAT|O_APPEND)
+#define OPEN_FLAGS_DONT_REPLACE (O_CREAT|O_EXCL|O_APPEND|O_WRONLY)
+typedef struct open_file_t open_file_t;
+int start_writing_to_file(const char *fname, int open_flags, int mode,
+                          open_file_t **data_out);
+FILE *start_writing_to_stdio_file(const char *fname, int open_flags, int mode,
+                                  open_file_t **data_out);
+FILE *fdopen_file(open_file_t *file_data);
+int finish_writing_to_file(open_file_t *file_data);
+int abort_writing_to_file(open_file_t *file_data);
+MOCK_DECL(int, write_str_to_file,(const char *fname, const char *str,
+                                  int bin));
+MOCK_DECL(int, write_bytes_to_file,(const char *fname, const char *str,
+                                    size_t len,int bin));
+
+/** An ad-hoc type to hold a string of characters and a count; used by
+ * write_chunks_to_file. */
+typedef struct sized_chunk_t {
+  const char *bytes;
+  size_t len;
+} sized_chunk_t;
+struct smartlist_t;
+int write_chunks_to_file(const char *fname, const struct smartlist_t *chunks,
+                         int bin, int no_tempfile);
+int append_bytes_to_file(const char *fname, const char *str, size_t len,
+                         int bin);
+int write_bytes_to_new_file(const char *fname, const char *str, size_t len,
+                            int bin);
+
+/** Flag for read_file_to_str: open the file in binary mode. */
+#define RFTS_BIN            1
+/** Flag for read_file_to_str: it's okay if the file doesn't exist. */
+#define RFTS_IGNORE_MISSING 2
+
+MOCK_DECL_ATTR(char *, read_file_to_str,(const char *filename, int flags,
+                                         struct stat *stat_out),
+               ATTR_MALLOC);
+char *read_file_to_str_until_eof(int fd, size_t max_bytes_to_read,
+                                 size_t *sz_out)
+  ATTR_MALLOC;
+
+#endif