pipedal_kconfig (Ubuntu Pi/Uboot)

PiPedalCommon/src/SysExec.cpp

@@ -306,3 +306,37 @@ SysExecOutput pipedal::sysExecForOutput(const std::string &program, const std::s
    }
 
 }
+
+
+int pipedal::SudoExec(int argc, char **argv)
+{
+    // re-execute with SUDO in order to prompt for SUDO credentials once only.
+    std::vector<char *> args;
+    std::string pkexec = "/usr/bin/sudo"; // staged because "ISO C++ forbids converting a string constant to std::vector<char*>::value_type"(!)
+    args.push_back((char *)(pkexec.c_str()));
+
+    std::string sPath = getSelfExePath();
+    args.push_back(const_cast<char *>(sPath.c_str()));
+    for (int arg = 1; arg < argc; ++arg)
+    {
+        args.push_back(const_cast<char *>(argv[arg]));
+    }
+
+    args.push_back(nullptr);
+
+    char **newArgs = &args[0];
+
+    int pbPid;
+    int returnValue = 0;
+
+    if ((pbPid = fork()) == 0)
+    {
+        return execv(newArgs[0], newArgs);
+    }
+    else
+    {
+        waitpid(pbPid, &returnValue, 0);
+        int exitStatus = WEXITSTATUS(returnValue);
+        return exitStatus;
+    }
+}

PiPedalCommon/src/include/SysExec.hpp

@@ -43,5 +43,9 @@ namespace pipedal
     void sysExecTerminate(ProcessId pid_, int termTimeoutMs = 1000, int killTimeoutMs = 500); // returns the process's exit status.
     int sysExecWait(ProcessId pid);
 
+    // re-execute the current program with current argument, but with sudo.
+    int SudoExec(int argc, char **argv);
+
+
     std::string getSelfExePath();
 }