Fix waitpid

Author: savalet

src/exec.c

@@ -129,11 +129,13 @@ int launch_bin(char *full_bin_path, char **args, ef_t *ef)
             status = command_error(full_bin_path, args, errno);
             free_env(ef->env);
             free((void *)args);
-            free(ef->buffer);
-            exit(status);
+            exit((free(ef->buffer), status));
         }
     }
-    waitpid(pid, &status, 0);
+    if (ef->out_fd == STDOUT_FILENO || ef->p_i == ef->p_sz - 1)
+        waitpid(pid, &status, 0);
+    else
+        waitpid(pid, &status, WNOHANG);
     if (WIFEXITED(status))
         ef->history->last_exit_code =
             ef->history->last_exit_code ?: WEXITSTATUS(status);

src/exec.h

@@ -33,6 +33,8 @@ typedef struct {
     size_t skip_i;
     size_t skip_sz;
     uint8_t flags;
+    size_t p_i;
+    size_t p_sz;
     int rin_fd;
     int rout_fd;
     int pipes[2];

src/visitor.c

@@ -110,8 +110,11 @@ int visit_pipes(ef_t *ef)
     ast_t *node = ef->act_node;
     int result = RETURN_FAILURE;
 
+    ef->p_i = 0;
+    ef->p_sz = node->list.sz;
     ef->pin_fd = STDIN_FILENO;
     for (size_t i = 0; i < node->list.sz; i++) {
+        ef->p_i = i;
         result = visit_pipe(ef, i, node);
         if (result == -1)
             break;