Execute system commands without invoking system shell

Changes after a code review:

- fixed documentation for the closeBackground function
- renamed ```app``` parameter to ```cmd```

1 files changed, 9 insertions, 9 deletions

diff --git a/src/MTS_System.cpp b/src/MTS_System.cpp
index 6acf065..31976e1 100644
--- a/src/MTS_System.cpp
+++ b/src/MTS_System.cpp
@@ -172,7 +172,7 @@ int32_t System::readFile(const std::string& path, std::string& result) {
     return 0;
 }
 
-int32_t System::execute(const std::string& app, const std::vector<std::string>& argv, std::string& result) {
+int32_t System::execute(const std::string& cmd, const std::vector<std::string>& argv, std::string& result) {
     // Ported directly from System::cmd
     std::string output;
     const int max_buffer = 256;
@@ -180,7 +180,7 @@ int32_t System::execute(const std::string& app, const std::vector<std::string>&
     int32_t code = -1;
     ChildHandle child;
 
-    if (executeBackground(app, argv, PipeType::READ, child)) {
+    if (executeBackground(cmd, argv, PipeType::READ, child)) {
         while (!feof(child.stream)) {
             if (fgets(buffer, max_buffer, child.stream) != NULL) {
                 output.append(buffer);
@@ -194,9 +194,9 @@ int32_t System::execute(const std::string& app, const std::vector<std::string>&
     return code;
 }
 
-bool System::executeBackground(const std::string& app, const std::vector<std::string>& argv, System::PipeType type, System::ChildHandle& child) {
-    std::vector<char*> arguments = castArgVector(app, argv);
-    return executeBackground(app, arguments.data(), type, child);
+bool System::executeBackground(const std::string& cmd, const std::vector<std::string>& argv, System::PipeType type, System::ChildHandle& child) {
+    std::vector<char*> arguments = castArgVector(cmd, argv);
+    return executeBackground(cmd, arguments.data(), type, child);
 }
 
 int System::closeBackground(System::ChildHandle& child) {
@@ -212,7 +212,7 @@ int System::closeBackground(System::ChildHandle& child) {
     return pstat;
 }
 
-bool System::executeBackground(const std::string& app, char* const argv[], System::PipeType type, ChildHandle& child) {
+bool System::executeBackground(const std::string& cmd, char* const argv[], System::PipeType type, ChildHandle& child) {
     pid_t childPid;
     FILE* stream = NULL;
     posix_spawn_file_actions_t actions;
@@ -262,7 +262,7 @@ bool System::executeBackground(const std::string& app, char* const argv[], Syste
             break;
         }
 
-        if (posix_spawnp(&childPid, app.c_str(), &actions, NULL, argv, NULL) != 0) {
+        if (posix_spawnp(&childPid, cmd.c_str(), &actions, NULL, argv, NULL) != 0) {
             // failed to spawn the process
             break;
         }
@@ -294,11 +294,11 @@ char* System::castArgument(const std::string& arg) {
     return const_cast<char*>(arg.c_str());
 }
 
-std::vector<char*> System::castArgVector(const std::string& app, const std::vector<std::string>& argv) {
+std::vector<char*> System::castArgVector(const std::string& cmd, const std::vector<std::string>& argv) {
     std::vector<char*> result;
 
     // Append application name as argument zero
-    result.push_back(castArgument(app));
+    result.push_back(castArgument(cmd));
 
     // Append all other arguments
     for (const std::string& arg : argv) {