Re: Add SHELL_EXIT_CODE to psql

Hi!

In overall, I think we move in the right direction. But we could make code better, should we?

+               /* Capture exit code for SHELL_EXIT_CODE */
+               close_exit_code = pclose(fd);
+               if (close_exit_code == -1)
+               {
+                       pg_log_error("%s: %m", cmd);
+                       error = true;
+               }
+               if (WIFEXITED(close_exit_code))
+                       exit_code=WEXITSTATUS(close_exit_code);
+               else if(WIFSIGNALED(close_exit_code))
+                       exit_code=WTERMSIG(close_exit_code);
+               else if(WIFSTOPPED(close_exit_code))
+                       exit_code=WSTOPSIG(close_exit_code);
+               if (exit_code)
+                       error = true;

I think, it's better to add spaces around middle if block. It will be easy to read.

Also, consider, adding spaces around assignment in this block.

+       /*
+       snprintf(exit_code_buf, sizeof(exit_code_buf), "%d", WEXITSTATUS(exit_code));
+       */

Probably, this is not needed.

> 1. pg_regress now creates an environment variable called PG_OS_TARGET

Maybe, we can use env "OS"? I do not know much about Windows, but I think this is kind of standard environment variable there.