shell: added shp

include/shell.hpp

@@ -2,6 +2,7 @@
 #define SHELL_HPP
 
 #include <string>
+#include <utility>
 #include <stdio.h>
 
 /*! \file shell.hpp
@@ -15,10 +16,17 @@ namespace ztd
   @param command Shell command to execute
   @param to_console Output to console
   @return Output of the command
-  @see <a href="https://linux.die.net/man/3/systeml">system(), pclose()</a>
   */
   std::string sh(const std::string& command, bool to_console=false);
 
+  //! @brief Execute a shell command and retrieve its output and return value
+  /*!
+  @param command Shell command to execute
+  @param to_console Output to console
+  @return @b first Output of command\n@b second Return value of command
+  */
+  std::pair<std::string, int> shp(const std::string& command, bool to_console=false);
+
   //! @brief popen C function with added pid functionality
   /*!
   @param pid Pointer to an @a int in which the process's pid will be stored

src/shell.cpp

@@ -8,6 +8,11 @@
 #include <signal.h>
 
 std::string ztd::sh(const std::string& command, bool to_console)
+{
+  return ztd::shp(command, to_console).first;
+}
+
+std::pair<std::string, int> ztd::shp(const std::string& command, bool to_console)
 {
   std::string ret;
   FILE *stream = popen(command.c_str(), "r");
@@ -21,8 +26,7 @@ std::string ztd::sh(const std::string& command, bool to_console)
     }
     ret += buff;
   }
-  pclose(stream);
-  return ret;
+  return std::make_pair(ret, pclose(stream));
 }
 
 FILE* ztd::popen2(const char* command, const char* type, int* pid)