README.md

@@ -1,41 +1,17 @@
-<!-- vim: set et ts=2 sw=2 tw=80 : -->
+# Msh-console
-
+* included flag handling implemented with popt.h;
-# msh-console
+Library that provides a bash-like command line for C++ programs. Features included:
-
+* creation of personalized commands in the same thread of the shell or in other threads;
-Library that provides a bash-like command line interface for C++ programs.
+* basic shell functionalities, such as execution of other programs in the system. This is implemented with execvp().
-
+What is not actually included:
-## Abandoned
-
-This was my first OOP project, so pardon the style and the conventions taken.
-This project is currently unmantained.
-
-## Features include:
-
-* flag handling implemented with `popt.h`;
-* creation of personalized commands in the same thread of the shell or in other 
-threads;
-* basic shell functionalities, such as execution of other programs in the
-system. This is implemented with `execvp()`.
-* piping, implemented with `<unistd.h>` `pipe()` function. Code based on
-https://stackoverflow.com/a/5207730.
-
-## What is not actually included:
-
 * advanced shell features, like:
+    * piping,
     * redirection,
     * scripting,
     * command history.
-
+### Credits
-## Credits
+Code based on "Write a Shell in C" tutorial by Stephen Brennan (http://brennan.io/2015/01/16/write-a-shell-in-c/).
-
+The code has been slightly modified.
-Code based on
+The code contains stringtoargcargv.cpp, a set of functions written by Bernhard Eder (http://web.archive.org/web/20121030075237/http://bbgen.net/blog/2011/06/string-to-argc-argv) for parsing a string into argc and argv.  
-["Write a Shell in C"](http://brennan.io/2015/01/16/write-a-shell-in-c/)
+### Compiling
-tutorial by Stephen Brennan. The code contains `stringtoargcargv.cpp`, a set of
+The library can be compiled as shared library with the CMakeLists.txt file already in msh-console-library/.
-functions written by Bernhard Eder
-[here](http://web.archive.org/web/20121030075237/http://bbgen.net/blog/2011/06/string-to-argc-argv)
-for parsing a string into `argc` and `argv`.  
-
-## Compiling
-
-The library can be compiled as shared library with the CMakeLists.txt file
-already in `msh-console-library/`.

aur/.gitignore

@@ -1,9 +0,0 @@
-# src folder
-src/
-
-# pkg folder
-pkg/
-
-# created package
-*.pkg.tar.xz
-*.zip

aur/PKGBUILD

@@ -1,46 +0,0 @@
-# Maintainer  : praticamentetilde
-_name=libmshconsole
-_branch=master
-
-pkgname=libmshconsole
-pkgver=0.40f2b2e
-pkgrel=1
-
-pkgdesc='Library that provides a bash-like interface for CLI C++ programs'
-url='https://github.com/praticamentetilde/msh-console.git'
-arch=('any')
-license=('custom:unlicense')
-
-depends=()
-makedepends=('git' 'gcc' 'cmake')
-optdepends=()
-
-headers=('commandexecutor.h' 'command.h' 'shell.h' 'stringtoargcargv.h')
-provides=()
-conflicts=()
-
-pkgver() {
-  DATE='0'
-  HASH=$(git ls-remote -h $url $_branch | cut -c1-7)
-  echo $DATE.$HASH
-}
-
-source=("$pkgname-$(pkgver).zip::https://github.com/praticamentetilde/msh-console/archive/$_branch.zip")
-sha512sums=(SKIP)
-
-#prepare() {}
-
-package() {
- cd msh-console-$_branch/library
- cmake CMakeLists.txt
- make
- mkdir -p "$pkgdir"/usr/include/mshconsole
- chmod 0755 "$pkgdir"/usr/include/mshconsole
- mv libmshconsole.so libmshconsole.so.1
- install -D -m644 libmshconsole.so.1 "$pkgdir"/usr/lib/libmshconsole.so.1
- ln -s "$pkgdir"/usr/lib/libmshconsole.so.1 "$pkgdir"/usr/lib/libmshconsole.so
- for i in "${headers[@]}"
-  do
-     install -D -m644 $i "$pkgdir"/usr/include/mshconsole/"$i"
-  done
-}

aur/README.md

@@ -1,2 +0,0 @@
-# msh-console-aur
-AUR package for msh-console

license.md

@@ -1,7 +1,24 @@
-2017 Claudio Maggioni (praticamentetilde)
+This is free and unencumbered software released into the public domain.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
 
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org>

msh-console-library/CMakeLists.txt

@@ -25,15 +25,14 @@ cmake_minimum_required(VERSION 2.8)
 
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lpopt")
 list(APPEND SRC_LIST "command.cpp" "commandexecutor.h" "commands.cpp" "datas.cpp" "shell.cpp" "stringtoargcargv.cpp"
-    "commandexecutor.cpp" "command.h" "data.cpp" "${CMAKE_CURRENT_SOURCE_DIR}/../snippet/main.cpp" "shell.h" "stringtoargcargv.h")
+    "commandexecutor.cpp" "command.h" "data.cpp" "main.cpp" "shell.h" "stringtoargcargv.h")
 
-set(lib Off) #off=debug demo with main.cpp, on=library
+set(lib ON) #off=debug demo with main.cpp, on=library
 if(${lib})
     MESSAGE(STATUS "Building .so.1")
-    list(REMOVE_ITEM SRC_LIST ${CMAKE_CURRENT_SOURCE_DIR}/../msh-console-script/main.cpp) #remove snippet file
+    list(REMOVE_ITEM SRC_LIST ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp) #remove demo file
     add_library (mshconsole SHARED ${SRC_LIST})
 else(${lib})
-    MESSAGE(STATUS "Building msh-console-snippet (debug only)")
+    MESSAGE(STATUS "Building exec (debug only)")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
     add_executable(${PROJECT_NAME} ${SRC_LIST})
 endif(${lib})

msh-console-library/command.cpp

@@ -43,6 +43,8 @@ namespace mshconsole {
     int Command::execute(const struct Params& p, CommandExecutor* c, std::ostream& errorStream){
         if(p.argc<=0) return -1;
 
+        // options a, b, c take integer arguments
+        // options f and g take no arguments
         poptContext pc;
         opts.push_back(POPT_TERMINATOR);
 
@@ -90,8 +92,6 @@ namespace mshconsole {
         while (poptPeekArg(pc) != NULL)
             nonOptionArgs.push_back(const_cast<const char*>(poptGetArg(pc)));
 
-        poptFreeContext(pc);
-
         return (*funcCommand)(c,datas,nonOptionArgs);
     }
 
@@ -110,10 +110,5 @@ namespace mshconsole {
             }
         }
     }
-
-    Command::~Command(){
-
-    }
-
     const struct poptOption Command::POPT_TERMINATOR = {NULL,'\0',POPT_ARG_NONE,NULL,-1,NULL,NULL};
 }

msh-console-library/commandexecutor.h

@@ -41,7 +41,7 @@ namespace mshconsole{
             ExitException(int c=0) : code(c){}
         };
     public:
-        virtual int executeCmd(const struct Params& args, bool isPipe=false) = 0;
+        virtual int executeCmd(const struct Params& args) = 0;
         virtual int executeCmd(const std::string& args) = 0;
         virtual size_t howManyCmds() const = 0;
         void exit(int code=0);

msh-console-library/commands.cpp

@@ -46,14 +46,6 @@ namespace mshconsole {
         }
         throw CommandNotFoundException();
     }
-    bool Shell::Commands::found(const std::string& s, bool launchThread){
-        for(unsigned int i=0; i<(launchThread ? threadCommands.size() : commands.size()); i++){
-            if((launchThread ? threadCommands[i]->getName() : commands[i]->getName())==s){
-                return true;
-            }
-        }
-        return false;
-    }
 }
 
 

msh-console-library/main.cpp

@@ -1,8 +1,8 @@
 #include <cstdlib>
 #include <cstring>
 #include <iostream>
-#include "../library/shell.h"
+#include "../msh-console-library/shell.h"
-#include "../library/command.h"
+#include "../msh-console-library/command.h"
 using namespace std;
 using namespace mshconsole;
 
@@ -55,21 +55,17 @@ int main(int argc, char **argv)
     string c = "msh-console-test";
     string ps = "[msh-console-test]:";
     Shell mshConsoleTest(c, ps, cin,cout,cerr, &setup);
-    Command help("help", &helpExecute);
+    Command* help = new Command("help", &helpExecute);
     struct poptOption h = {"help",'h',POPT_ARG_NONE,NULL,1000,"advance","advaced options"};
     struct poptOption p = {"prova",'p',POPT_ARG_STRING,NULL,1000,"cose","cosecose"};
-    help.addOption(h);
+    help->addOption(h);
-    help.addOption(p);
+    help->addOption(p);
-
-    Command exit("exit", &exitExecute);
-    Command cd("cd", &cdExecute);
 
     //add builtin commands
-    mshConsoleTest.addCmd(&help, true);
+    mshConsoleTest.addCmd(help);
-    mshConsoleTest.addCmd(&cd);
+    mshConsoleTest.addCmd(new Command("exit", &exitExecute));
-    mshConsoleTest.addCmd(&exit);
+    mshConsoleTest.addCmd(new Command("cd", &cdExecute));
     mshConsoleTest.launch();
-
     return EXIT_SUCCESS;
 }
 

msh-console-library/shell.cpp

@@ -60,10 +60,11 @@ namespace mshconsole {
 
         //Run the shell loop.
         int exitCode;
-        std::string* line=nullptr;
-        std::vector<std::string> p;
 
         try{
+            std::string* line=nullptr;
+            struct Params p;
+
             while(1){
                 delete line;
                 outputStream << ps << " "; //Print the prompt.
@@ -88,11 +89,10 @@ namespace mshconsole {
                     continue;
                 }
 
-                //Execute the pipe.
+                //Execute the command.
-                executePipe(p);
+                executeCmd(p);
             };
         } catch(CommandExecutor::ExitException c) {
-            delete line;
             exitCode=c.getCode();
         }
 
@@ -103,103 +103,6 @@ namespace mshconsole {
         return exitCode;
     }
 
-    int Shell::executePipe(std::vector<std::string>& argv)
-    {
-        int newPipe[2], oldPipe[2], status;
-        pid_t pid;
-
-        std::vector<std::vector<std::string>> argvs;
-
-        size_t c=0, i=0;
-        for(; i<argv.size(); i++){
-            if(argv[i]=="|"){ //Pipe reached
-                if(c!=i){
-                    //Write the command in the pipe std::vector
-                    argvs.push_back(std::vector<std::string>(argv.begin()+c, argv.begin()+i));
-                }
-                c=i+1;
-            }
-        }
-        if(c!=i){
-            //Write the last command in the pipe std::vector
-            argvs.push_back(std::vector<std::string>(argv.begin()+c, argv.end()));
-        }
-        if(argvs.size()==1){
-            struct Params p;
-            vectorToArgcArgv(argvs[0], &p.argc, &p.argv);
-            return executeCmd(p,false);
-        }
-        for(size_t i=0; i<argvs.size(); i++){
-            if(cmds.found(std::string(argvs[i][0]),false)){
-                errorStream << name << ": non-thread command " << argv[0] << " can't be launched from a pipe" << std::endl;
-                return 1;
-            }
-        }
-        for(size_t i=0; i<argvs.size(); i++) /* For each command */
-        {
-            struct Params p;
-            vectorToArgcArgv(argvs[i], &p.argc, &p.argv);
-
-            /* If there still are commands to be executed */
-            if(i < argvs.size()-1)
-            {
-                pipe(newPipe); /* just create a pipe */
-            }
-
-            pid = fork();
-
-            if(pid == 0)  /* Child */
-            {
-                /* If there is a previous command */
-                if(i > 0)
-                {
-                    close(oldPipe[1]);
-                    dup2(oldPipe[0], 0); //redirect stdin to input of the pipe
-                    close(oldPipe[0]);
-                }
-
-                /* If there still are commands to be executed */
-                if(i < argvs.size()-1)
-                {
-                    close(newPipe[0]);
-                    dup2(newPipe[1], 1); //redirect stdout to output of the pipe
-                    close(newPipe[1]);
-                }
-
-                //Execute
-                exit(executeCmd(p,true));
-            }
-            else if (pid < 0) {
-                // Error forking
-                errorStream << name <<": error in process forking.\n";
-            }
-            else /* Father */
-            {
-                /* If there is a previous command */
-                if(i > 0)
-                {
-                    close(oldPipe[0]);
-                    close(oldPipe[1]);
-                }
-
-                /* do we have a next command? */
-                if(i < argvs.size()-1)
-                {
-                    oldPipe[0] = newPipe[0];
-                    oldPipe[1] = newPipe[1];
-                }
-
-                /* wait for last command process? */
-                if(i == argvs.size()-1)
-                {
-                    waitpid(pid, &status, 0);
-                }
-            }
-            deleteParams(p);
-        }
-        return 0;
-    }
-
     int Shell::launchCmd(const struct Params& p){
         int status;
 
@@ -217,9 +120,7 @@ namespace mshconsole {
             catch (CommandNotFoundException){}
 
             //execute bash command or program
-            a=execvp(p.argv[0], p.argv);
+            if((a=execvp(p.argv[0], p.argv)) == -1) {
-
-            if(a == -1) {
                 outputStream << name << ": execution failed. Errno is set to: "<<strerror(errno)<<"\n";
                 std::exit(EXIT_FAILURE);
             }
@@ -239,29 +140,21 @@ namespace mshconsole {
         return 1;
     }
 
-    int Shell::executeCmd(const struct Params& p, bool isPipe){
+    int Shell::executeCmd(const struct Params& p){
         if (!p.argc) return 1; //Return if the line is empty.
 
-        if(isPipe){
-            if(cmds.found(p.argv[0],false)){
-                errorStream << name << ": non-thread command " << p.argv[0] << " can't be launched from a pipe" << std::endl;
-                return 1;
-            }
-        }
-        else{
         try {
             //Search in non-thread commands.
             return cmds.launch(p, false);
         }
         catch(CommandNotFoundException) {}
-        }
+
         //Execute the threadCommand or the executable.
         return launchCmd(p);
     }
 
     inline int Shell::executeCmd(const std::string &args){
-        std::vector<std::string>a =splitLine(&args);
+        return executeCmd(splitLine(&args));
-        return executePipe(a);
     }
 
     void Shell::SIGINTHandler(int,siginfo_t*, void *){
@@ -288,14 +181,9 @@ namespace mshconsole {
     struct sigaction* setHandler(unsigned signal, void (*funcptr)(int, siginfo_t*, void*)){
         struct sigaction* before = new struct sigaction();
         struct sigaction sa;
-        sigset_t mask;
-        sigemptyset(&mask);
-        sigaddset(&mask, SIGTERM);
-        sa.sa_mask=mask;
         sa.sa_sigaction = funcptr;
-        sa.sa_flags = SA_RESTART;
+        sa.sa_flags = 0;
         sigaction(signal, &sa, before);
-        return before;
     }
 
     void restoreHandler(unsigned signal, struct sigaction* before){
@@ -318,12 +206,10 @@ namespace mshconsole {
         return buffer;
     }
 
-    std::vector<std::string> Shell::splitLine(const std::string* line){
+    struct Params Shell::splitLine(const std::string* line){
-        return parseStringToVector(*line);
+        struct Params p;
-    }
+        stringToArgcArgv(*line, &(p.argc), &(p.argv));
-
+        return p;
-    void Shell::deleteParams(struct Params p){
-        freeString(p.argc,p.argv);
     }
 
     bool Shell::SIGINTRaised = false;

msh-console-library/shell.h

@@ -55,7 +55,6 @@ namespace mshconsole {
             void add(Command*, bool isthread=false);
             size_t howMany() const;
             int launch(const struct Params& args, bool launchThread=false);
-            bool found(const std::string& args, bool launchThread=false);
         };
 
         static bool SIGINTRaised;
@@ -71,9 +70,7 @@ namespace mshconsole {
         int launchCmd(const struct Params& args);
         static void SIGINTHandler(int,siginfo_t *info, void *);
         std::string* readLine();
-        std::vector<std::string> splitLine(const std::string* line);
+        struct Params splitLine(const std::string* line);
-        int executePipe(std::vector<std::string>& argv);
-        void deleteParams(struct Params p);
 
         class IsUndoingLineException {};
         class CommandNotFoundException {};
@@ -94,7 +91,7 @@ namespace mshconsole {
         //for in-shell commands
         void addCmd(Command *cmd, bool isThread=false);
 
-        int executeCmd(const struct Params& args, bool isPipe=false);
+        int executeCmd(const struct Params& args);
         int executeCmd(const std::string& args);
         size_t howManyCmds() const;
     };

msh-console-library/stringtoargcargv.cpp

@@ -27,38 +27,33 @@
 #include "stringtoargcargv.h"
 
 namespace StringToArgcArgv{
+    /*
+     * Usage:
+     * int argc;
+     * char** argv;
+     * stringToArgcArgv("foo bar", &argc, &argv);
+     */
+    void stringToArgcArgv(const std::string& str, int* argc, char*** argv)
+    {
+      std::vector<std::string> args = parse(str);
 
-    static inline bool _isQuote(char c);
+      *argv = (char**)std::malloc((args.size()+1) * sizeof(char*));
-    static inline bool _isEscape(char c);
-    static inline bool _isPipe(char c);
-    static inline bool _isWhitespace(char c);
 
-    void vectorToArgcArgv(const std::vector<std::string>& args, int* argc, char*** argv){
-        *argv = new char*[args.size()+1]();
       int i=0;
-        for(std::vector<std::string>::const_iterator it = args.begin();
+      for(std::vector<std::string>::iterator it = args.begin();
           it != args.end();
-          ++it, ++i){
+          ++it, ++i)
+      {
         std::string arg = *it;
-            (*argv)[i] = new char[arg.length()+1]();
+        (*argv)[i] = (char*)std::malloc((arg.length()+1) * sizeof(char));
         std::strcpy((*argv)[i], arg.c_str());
       }
       (*argv)[i]=NULL;
+
       *argc = args.size();
     }
 
-    void stringToArgcArgv(const std::string& str, int* argc, char*** argv){
+    std::vector<std::string> parse(const std::string& args)
-        return vectorToArgcArgv(parseStringToVector(str),argc,argv);
-    }
-
-    void freeString(int& argc, char**& argv){
-        for(int i=0; i<argc; i++){
-            delete[] argv[i];
-        }
-        delete[] argv;
-    }
-
-    std::vector<std::string> parseStringToVector(const std::string& args)
     {
       std::stringstream ain(args);    // used to iterate over input string
       ain >> std::noskipws;           // do not skip white spaces
@@ -99,18 +94,16 @@ namespace StringToArgcArgv{
           }
 
         }
-        else if(_isWhitespace(c) || _isPipe(c)) {
+        else if(_isWhitespace(c)) {
           switch(currentState) {
             case InArg:
               oargs.push_back(currentArg.str());
-                if(_isPipe(c)) oargs.push_back("|");
               currentState = OutOfArg;
               break;
             case InArgQuote:
               currentArg << c;
               break;
             case OutOfArg:
-                if(_isPipe(c)) oargs.push_back("|");
               // nothing
               break;
           }
@@ -174,7 +167,8 @@ namespace StringToArgcArgv{
       return oargs;
     }
 
-    static inline bool _isQuote(char c){
+    bool _isQuote(char c)
+    {
       if(c == '\"')
         return true;
       else if(c == '\'')
@@ -183,14 +177,16 @@ namespace StringToArgcArgv{
       return false;
     }
 
-    static inline bool _isEscape(char c){
+    bool _isEscape(char c)
+    {
       if(c == '\\')
         return true;
 
       return false;
     }
 
-    static inline bool _isWhitespace(char c){
+    bool _isWhitespace(char c)
+    {
       if(c == ' ')
         return true;
       else if(c == '\t')
@@ -198,9 +194,4 @@ namespace StringToArgcArgv{
 
       return false;
     }
-
-    static inline bool _isPipe(char c){
-      if(c == '|') return true;
-      return false;
-    }
 }

msh-console-library/stringtoargcargv.h

@@ -36,9 +36,11 @@
 #include <cstring>
 
 namespace StringToArgcArgv{
-    void vectorToArgcArgv(const std::vector<std::string>& args, int* argc, char*** argv);
+    bool _isQuote(char c);
-    std::vector<std::string> parseStringToVector(const std::string& args);
+    bool _isEscape(char c);
+    bool _isEscape(char c);
+    bool _isWhitespace(char c);
+    std::vector<std::string> parse(const std::string& args);
     void stringToArgcArgv(const std::string& str, int* argc, char*** argv);
-    void freeString(int& argc, char**& argv);
 }
 #endif //STRINGTOARGCARGV_H

snippet/.gitignore

@@ -1,45 +0,0 @@
-#kate directory files
-*.directory
-
-#Qt creator .pro.user
-*.pro.user
-*.cbp
-*.txt.user
-
-# Compiled Object files
-*.slo
-*.lo
-*.o
-*.obj
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Compiled Dynamic libraries
-*.so
-*.dylib
-*.dll
-
-# Fortran module files
-*.mod
-
-# Compiled Static libraries
-*.lai
-*.la
-*.a
-*.lib
-
-# Executables
-*.exe
-*.out
-*.app
-
-# cmake
-
-CMakeCache.txt
-CMakeFiles
-CMakeScripts
-Makefile
-cmake_install.cmake
-install_manifest.txt