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authorTao Bao <tbao@google.com>2018-07-17 07:09:59 +0200
committerTao Bao <tbao@google.com>2018-07-17 21:16:53 +0200
commit1700cc46b5531499b7b532cda05d442f5f60acd4 (patch)
treefa668d92873b1f1d1df22bb992610ea53a69ed49 /otautil
parentMerge "applypatch: Consolidate CacheSizeCheck() and MakeFreeSpaceOnCache()." (diff)
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Diffstat (limited to 'otautil')
-rw-r--r--otautil/include/otautil/sysutil.h5
-rw-r--r--otautil/sysutil.cpp9
2 files changed, 14 insertions, 0 deletions
diff --git a/otautil/include/otautil/sysutil.h b/otautil/include/otautil/sysutil.h
index 649f8ffae..2eeb7c302 100644
--- a/otautil/include/otautil/sysutil.h
+++ b/otautil/include/otautil/sysutil.h
@@ -54,4 +54,9 @@ class MemMapping {
// 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 ab1513088..d8969a0bb 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 @@ bool reboot(const std::string& command) {
}
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;
+}