Merge "Fix the arguments passed to getopt_long(3)."
diff --git a/otautil/include/otautil/sysutil.h b/otautil/include/otautil/sysutil.h
index 649f8ff..2eeb7c3 100644
--- a/otautil/include/otautil/sysutil.h
+++ b/otautil/include/otautil/sysutil.h
@@ -54,4 +54,9 @@
// command should start with "reboot," (e.g. "reboot,bootloader" or "reboot,").
bool reboot(const std::string& command);
+// Returns a null-terminated char* array, where the elements point to the C-strings in the given
+// vector, plus an additional nullptr at the end. This is a helper function that facilitates
+// calling C functions (such as getopt(3)) that expect an array of C-strings.
+std::vector<char*> StringVectorToNullTerminatedArray(const std::vector<std::string>& args);
+
#endif // _OTAUTIL_SYSUTIL
diff --git a/otautil/sysutil.cpp b/otautil/sysutil.cpp
index ab15130..d8969a0 100644
--- a/otautil/sysutil.cpp
+++ b/otautil/sysutil.cpp
@@ -23,6 +23,7 @@
#include <sys/stat.h>
#include <sys/types.h>
+#include <algorithm>
#include <string>
#include <vector>
@@ -211,3 +212,11 @@
}
return android::base::SetProperty(ANDROID_RB_PROPERTY, cmd);
}
+
+std::vector<char*> StringVectorToNullTerminatedArray(const std::vector<std::string>& args) {
+ std::vector<char*> result(args.size());
+ std::transform(args.cbegin(), args.cend(), result.begin(),
+ [](const std::string& arg) { return const_cast<char*>(arg.c_str()); });
+ result.push_back(nullptr);
+ return result;
+}
diff --git a/recovery.cpp b/recovery.cpp
index fea65ae..3284440 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -963,10 +963,6 @@
}
Device::BuiltinAction start_recovery(Device* device, const std::vector<std::string>& args) {
- std::vector<char*> args_to_parse(args.size());
- std::transform(args.cbegin(), args.cend(), args_to_parse.begin(),
- [](const std::string& arg) { return const_cast<char*>(arg.c_str()); });
-
static constexpr struct option OPTIONS[] = {
{ "fsck_unshare_blocks", no_argument, nullptr, 0 },
{ "just_exit", no_argument, nullptr, 'x' },
@@ -1002,9 +998,14 @@
bool security_update = false;
std::string locale;
+ auto args_to_parse = StringVectorToNullTerminatedArray(args);
+
int arg;
int option_index;
- while ((arg = getopt_long(args_to_parse.size(), args_to_parse.data(), "", OPTIONS,
+ // Parse everything before the last element (which must be a nullptr). getopt_long(3) expects a
+ // null-terminated char* array, but without counting null as an arg (i.e. argv[argc] should be
+ // nullptr).
+ while ((arg = getopt_long(args_to_parse.size() - 1, args_to_parse.data(), "", OPTIONS,
&option_index)) != -1) {
switch (arg) {
case 't':
diff --git a/recovery_main.cpp b/recovery_main.cpp
index 5e82c6c..c79d7d8 100644
--- a/recovery_main.cpp
+++ b/recovery_main.cpp
@@ -29,7 +29,6 @@
#include <time.h>
#include <unistd.h>
-#include <algorithm>
#include <string>
#include <vector>
@@ -287,9 +286,7 @@
has_cache = volume_for_mount_point(CACHE_ROOT) != nullptr;
std::vector<std::string> args = get_args(argc, argv);
- std::vector<char*> args_to_parse(args.size());
- std::transform(args.cbegin(), args.cend(), args_to_parse.begin(),
- [](const std::string& arg) { return const_cast<char*>(arg.c_str()); });
+ auto args_to_parse = StringVectorToNullTerminatedArray(args);
static constexpr struct option OPTIONS[] = {
{ "locale", required_argument, nullptr, 0 },
@@ -302,7 +299,7 @@
int arg;
int option_index;
- while ((arg = getopt_long(args_to_parse.size(), args_to_parse.data(), "", OPTIONS,
+ while ((arg = getopt_long(args_to_parse.size() - 1, args_to_parse.data(), "", OPTIONS,
&option_index)) != -1) {
switch (arg) {
case 't':
diff --git a/tests/unit/sysutil_test.cpp b/tests/unit/sysutil_test.cpp
index 19fa4c5..de8ff70 100644
--- a/tests/unit/sysutil_test.cpp
+++ b/tests/unit/sysutil_test.cpp
@@ -127,3 +127,13 @@
ASSERT_TRUE(android::base::WriteStringToFile("/doesntexist\n4096 4096\n1\n0 1\n", temp_file.path));
ASSERT_FALSE(mapping.MapFile(filename));
}
+
+TEST(SysUtilTest, StringVectorToNullTerminatedArray) {
+ std::vector<std::string> args{ "foo", "bar", "baz" };
+ auto args_with_nullptr = StringVectorToNullTerminatedArray(args);
+ ASSERT_EQ(4, args_with_nullptr.size());
+ ASSERT_STREQ("foo", args_with_nullptr[0]);
+ ASSERT_STREQ("bar", args_with_nullptr[1]);
+ ASSERT_STREQ("baz", args_with_nullptr[2]);
+ ASSERT_EQ(nullptr, args_with_nullptr[3]);
+}
