add more builtins

1 files changed, 22 insertions, 3 deletions

diff --git a/src/exec.c b/src/exec.c
index a65b442..e3ea28f 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -26,9 +26,15 @@ MaybeStrPair parse_assignment(char* token) {
 
 
 bool handle_builtin(ExecutableCommand cmd, ShellState* shstate) {
-
+    MaybeStrPair m_assignment;
     assert(cmd.args[0] != NULL); 
     // TODO: handle id=value assignments
+    
+    m_assignment = parse_assignment(cmd.args[0]);
+    if (m_assignment.some) {
+        set_map_pair(&shstate->shell_vars, m_assignment.value);
+        return true;
+    }
 
     if (strcmp(cmd.args[0], "exit") == 0) {
         exit(0);
@@ -38,16 +44,29 @@ bool handle_builtin(ExecutableCommand cmd, ShellState* shstate) {
         return true;
     } else if (strcmp(cmd.args[0], "alias") == 0) {
         // TODO: if no arg1 -> print alias list
-        MaybeStrPair m_assignment = parse_assignment(cmd.args[1]);
+        m_assignment = parse_assignment(cmd.args[1]);
         assert(m_assignment.some);
         set_map_pair(&shstate->aliases, m_assignment.value); 
         return true;
+    } else if (strcmp(cmd.args[0], "export") == 0) {
+        m_assignment = parse_assignment(cmd.args[1]);
+        assert(m_assignment.some);
+        setenv(m_assignment.value.key, m_assignment.value.val, 1);
+        return true;
+    } else if (strcmp(cmd.args[0], "unalias") == 0) { 
+        assert(cmd.args[1] != NULL);
+        unset_map_key(&shstate->aliases, cmd.args[1]);
+        return true;
+    }  else if (strcmp(cmd.args[0], "unset") == 0) {
+        assert(cmd.args[1] != NULL);
+        unset_map_key(&shstate->shell_vars, cmd.args[1]);
+        return true;
     }
     return false;
 }
 
 void execute_cmd(ExecutableCommand cmd, int* pgid) {
-    
+
     pid_t pid = fork();
 
     if (pid == 0) {