From 7551c44a5375c390b653c7b8f28d904a3156e1ae Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Thu, 19 Oct 2006 23:05:02 +0000
Subject:  r9274@Kushana:  nickm | 2006-10-19 16:16:58 -0400  Add unit tests
 for tor_mmap_file(); make tor_mmap_t.size always be the size of the file (not
 the size of the mapping); add an extra argument to read_file_to_str() so it
 can return the size of the result string.

svn:r8762
---
 src/or/config.c     |  6 +++---
 src/or/dirserv.c    |  2 +-
 src/or/hibernate.c  |  2 +-
 src/or/routerlist.c |  4 ++--
 src/or/test.c       | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 60 insertions(+), 7 deletions(-)

(limited to 'src/or')

diff --git a/src/or/config.c b/src/or/config.c
index b3934c4f6..1a7b6c8a0 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -2801,7 +2801,7 @@ options_init_from_torrc(int argc, char **argv)
 
   /* get config lines, assign them */
   if (file_status(fname) != FN_FILE ||
-      !(cf = read_file_to_str(fname,0))) {
+      !(cf = read_file_to_str(fname,0,NULL))) {
     if (using_default_torrc == 1) {
       log(LOG_NOTICE, LD_CONFIG, "Configuration file \"%s\" not present, "
           "using reasonable defaults.", fname);
@@ -3421,7 +3421,7 @@ write_configuration_file(const char *fname, or_options_t *options)
   if (fname) {
     switch (file_status(fname)) {
       case FN_FILE:
-        old_val = read_file_to_str(fname, 0);
+        old_val = read_file_to_str(fname, 0, NULL);
         if (strcmpstart(old_val, GENERATED_FILE_PREFIX)) {
           rename_old = 1;
         }
@@ -3835,7 +3835,7 @@ or_state_load(void)
   fname = get_or_state_fname();
   switch (file_status(fname)) {
     case FN_FILE:
-      if (!(contents = read_file_to_str(fname, 0))) {
+      if (!(contents = read_file_to_str(fname, 0, NULL))) {
         log_warn(LD_FS, "Unable to read state file \"%s\"", fname);
         goto done;
       }
diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index 16625d99c..355dcef52 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -148,7 +148,7 @@ dirserv_load_fingerprint_file(void)
   log_info(LD_GENERAL,
            "Reloading approved fingerprints from \"%s\"...", fname);
 
-  cf = read_file_to_str(fname, 0);
+  cf = read_file_to_str(fname, 0, NULL);
   if (!cf) {
     if (options->NamingAuthoritativeDir) {
       log_warn(LD_FS, "Cannot open fingerprint file '%s'. Failing.", fname);
diff --git a/src/or/hibernate.c b/src/or/hibernate.c
index 2144a86fe..be6761a30 100644
--- a/src/or/hibernate.c
+++ b/src/or/hibernate.c
@@ -587,7 +587,7 @@ read_bandwidth_usage(void)
 
   tor_snprintf(fname, sizeof(fname), "%s/bw_accounting",
                get_options()->DataDirectory);
-  if (!(s = read_file_to_str(fname, 0))) {
+  if (!(s = read_file_to_str(fname, 0, NULL))) {
     return 0;
   }
   elts = smartlist_create();
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index 2f7e0e096..25e54dfef 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -136,7 +136,7 @@ router_reload_networkstatus(void)
       }
       tor_snprintf(filename,sizeof(filename),"%s/cached-status/%s",
                    get_options()->DataDirectory, fn);
-      s = read_file_to_str(filename, 0);
+      s = read_file_to_str(filename, 0, NULL);
       if (s) {
         stat(filename, &st);
         if (router_set_networkstatus(s, st.st_mtime, NS_FROM_CACHE, NULL)<0) {
@@ -369,7 +369,7 @@ router_reload_router_list(void)
 
   tor_snprintf(fname, fname_len, "%s/cached-routers.new",
                options->DataDirectory);
-  contents = read_file_to_str(fname, 1);
+  contents = read_file_to_str(fname, 1, NULL);
   if (contents) {
     stat(fname, &st);
     router_load_routers_from_string(contents,
diff --git a/src/or/test.c b/src/or/test.c
index 5a7903f09..2b441aeec 100644
--- a/src/or/test.c
+++ b/src/or/test.c
@@ -1163,6 +1163,58 @@ test_strmap(void)
   strmap_free(map,NULL);
 }
 
+static void
+test_mmap(void)
+{
+  char *fname1 = tor_strdup(get_fname("mapped_1"));
+  char *fname2 = tor_strdup(get_fname("mapped_2"));
+  char *fname3 = tor_strdup(get_fname("mapped_3"));
+  const size_t buflen = 17000;
+  char *buf = tor_malloc(17000);
+  tor_mmap_t *mapping;
+
+  crypto_rand(buf, buflen);
+
+  write_str_to_file(fname1, "Short file.", 1);
+  write_bytes_to_file(fname2, buf, buflen, 1);
+  write_bytes_to_file(fname3, buf, 16384, 1);
+
+  mapping = tor_mmap_file(fname1);
+  test_assert(mapping);
+  test_eq(mapping->size, strlen("Short file."));
+  test_streq(mapping->data, "Short file.");
+  /* make sure we can unlink. */
+  test_assert(unlink(fname1) == 0);
+  test_streq(mapping->data, "Short file.");
+  tor_munmap_file(mapping);
+
+  /* Make sure that we fail to map a no-longer-existant file. */
+  mapping = tor_mmap_file(fname1);
+  test_assert(mapping == NULL);
+
+  /* Now try a big file that stretches across a few pages and isn't aligned */
+  mapping = tor_mmap_file(fname2);
+  test_assert(mapping);
+  test_eq(mapping->size, buflen);
+  test_memeq(mapping->data, buf, buflen);
+  tor_munmap_file(mapping);
+
+  /* Now try a big aligned file. */
+  mapping = tor_mmap_file(fname3);
+  test_assert(mapping);
+  test_eq(mapping->size, 16384);
+  test_memeq(mapping->data, buf, 16384);
+
+  /* fname1 got unlinked above */
+  unlink(fname2);
+  unlink(fname3);
+
+  tor_free(fname1);
+  tor_free(fname2);
+  tor_free(fname3);
+  tor_free(buf);
+}
+
 static void
 test_control_formats(void)
 {
@@ -1771,6 +1823,7 @@ main(int c, char**v)
   test_strmap();
   test_control_formats();
   test_pqueue();
+  test_mmap();
   puts("\n========================= Onion Skins =====================");
   test_onion();
   test_onion_handshake();
-- 
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