fix: inherit process environment and untrack libc objects

kernel/src/Sched/Scheduler.cpp

@@ -294,6 +294,8 @@ namespace Sched {
             processTable[i].heapNext = 0;
             processTable[i].readdirCursor = 0;
             processTable[i].args[0] = '\0';
+            processTable[i].environment[0] = '\0';
+            processTable[i].environmentLength = 1;
             processTable[i].user[0] = '\0';
             processTable[i].cwd[0] = '\0';
             processTable[i].runningOnCpu = -1;
@@ -337,7 +339,8 @@ namespace Sched {
             << " process slots, " << (uint64_t)TimeSliceMs << " ms time slice)";
     }
 
-    int Spawn(const char* vfsPath, const char* args, bool startReady) {
+    int Spawn(const char* vfsPath, const char* args, bool startReady,
+              const char* environment, uint32_t environmentLength) {
         schedLock.Acquire();
 
         int slot = -1;
@@ -511,6 +514,9 @@ namespace Sched {
 
         auto* currentCpu = Smp::GetCurrentCpuData();
         int parentSlot = currentCpu ? currentCpu->currentSlot : -1;
+        int parentPrimarySlot = parentSlot;
+        if (parentPrimarySlot >= 0 && processTable[parentPrimarySlot].primarySlot >= 0)
+            parentPrimarySlot = processTable[parentPrimarySlot].primarySlot;
 
         // Copy arguments string into process
         proc.args[0] = '\0';
@@ -522,6 +528,23 @@ namespace Sched {
             proc.args[i] = '\0';
         }
 
+        // posix_spawn(envp) supplies an explicit snapshot. Plain spawn calls
+        // omit it and inherit the environment stored on the parent process.
+        if (environment != nullptr && environmentLength > 0 &&
+            environmentLength <= Process::EnvironmentBytes) {
+            for (uint32_t i = 0; i < environmentLength; i++)
+                proc.environment[i] = environment[i];
+            proc.environmentLength = environmentLength;
+        } else if (parentPrimarySlot >= 0) {
+            auto& parent = processTable[parentPrimarySlot];
+            for (uint32_t i = 0; i < parent.environmentLength; i++)
+                proc.environment[i] = parent.environment[i];
+            proc.environmentLength = parent.environmentLength;
+        } else {
+            proc.environment[0] = '\0';
+            proc.environmentLength = 1;
+        }
+
         // Inherit user string from parent, or default to "system" if no parent
         {
             if (parentSlot >= 0) {