Fix insmod module size

read_file() used to append a new line character to the end of the buffer it
returns, because parse_config() isn't able to cope with input that's not
'\n'-terminated. Fix read_file() to be less insane, and push the workarounds
into the parse_config() callers.

Longer term we should rewrite parse_config().

Bug: http://b/21079470
Change-Id: Ie9d9a7adcd33b66621726aef20c4b8cc51c08be7
(cherry picked from commit eaa3b4ec6f79fe06163b8dd6fe8ba2581d3b9c0b)

5 files changed, 11 insertions, 15 deletions

diff --git a/init/builtins.cpp b/init/builtins.cpp
index f59d1fe..735033e 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -57,16 +57,13 @@ extern "C" int init_module(void *, unsigned long, const char *);
 
 static int insmod(const char *filename, char *options)
 {
-    std::string module;
     char filename_val[PROP_VALUE_MAX];
-    int ret;
-
-    ret = expand_props(filename_val, filename, sizeof(filename_val));
-    if (ret) {
+    if (expand_props(filename_val, filename, sizeof(filename_val)) == -1) {
         ERROR("insmod: cannot expand '%s'\n", filename);
         return -EINVAL;
     }
 
+    std::string module;
     if (!read_file(filename_val, &module)) {
         return -1;
     }
diff --git a/init/init_parser.cpp b/init/init_parser.cpp
index b76b04e..d36995d 100644
--- a/init/init_parser.cpp
+++ b/init/init_parser.cpp
@@ -382,13 +382,13 @@ static void parse_new_section(struct parse_state *state, int kw,
 
 static void parse_config(const char *fn, const std::string& data)
 {
-    struct parse_state state;
     struct listnode import_list;
     struct listnode *node;
     char *args[INIT_PARSER_MAXARGS];
-    int nargs;
 
-    nargs = 0;
+    int nargs = 0;
+
+    parse_state state;
     state.filename = fn;
     state.line = 0;
     state.ptr = strdup(data.c_str());  // TODO: fix this code!
@@ -444,6 +444,7 @@ int init_parse_config_file(const char* path) {
         return -1;
     }
 
+    data.push_back('\n'); // TODO: fix parse_config.
     parse_config(path, data);
     dump_parser_state();
 
diff --git a/init/property_service.cpp b/init/property_service.cpp
index a52c41d..0ee0351 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -420,6 +420,7 @@ static void load_properties_from_file(const char* filename, const char* filter)
     Timer t;
     std::string data;
     if (read_file(filename, &data)) {
+        data.push_back('\n');
         load_properties(&data[0], filter);
     }
     NOTICE("(Loading properties from %s took %.2fs.)\n", filename, t.duration());
diff --git a/init/ueventd_parser.cpp b/init/ueventd_parser.cpp
index 7a4841f..497c606 100644
--- a/init/ueventd_parser.cpp
+++ b/init/ueventd_parser.cpp
@@ -193,10 +193,10 @@ static void parse_line(struct parse_state *state, char **args, int nargs)
 
 static void parse_config(const char *fn, const std::string& data)
 {
-    struct parse_state state;
     char *args[UEVENTD_PARSER_MAXARGS];
-    int nargs;
-    nargs = 0;
+
+    int nargs = 0;
+    parse_state state;
     state.filename = fn;
     state.line = 1;
     state.ptr = strdup(data.c_str());  // TODO: fix this code!
@@ -231,6 +231,7 @@ int ueventd_parse_config_file(const char *fn)
         return -1;
     }
 
+    data.push_back('\n'); // TODO: fix parse_config.
     parse_config(fn, data);
     dump_parser_state();
     return 0;
diff --git a/init/util.cpp b/init/util.cpp
index d6fd0fc..df4c25f 100644
--- a/init/util.cpp
+++ b/init/util.cpp
@@ -171,9 +171,6 @@ bool read_file(const char* path, std::string* content) {
 
     bool okay = android::base::ReadFdToString(fd, content);
     TEMP_FAILURE_RETRY(close(fd));
-    if (okay) {
-        content->append("\n", 1);
-    }
     return okay;
 }
 
@@ -475,4 +472,3 @@ std::string bytes_to_hex(const uint8_t* bytes, size_t bytes_len) {
         android::base::StringAppendF(&hex, "%02x", bytes[i]);
     return hex;
 }
-