actions: restore stderr for interactive pkg_add prompts

Without verbosity (-V), pkg_add's interactive prompts (e.g., unsigned package
confirmation) were invisible because stderr was redirected to the log file.
This made installations appear to hang while waiting for user input.

Fix by temporarily restoring original stderr before running pkg_add, then
redirecting it back to the log afterward. Ensures prompts are visible on the
terminal without affecting logging.

Signed-off-by: Alexey Romanov <romanov.alexey2000@gmail.com>

Author: mRrvz

actions.c

@@ -41,6 +41,7 @@
 
 static int	warn_count = 0, err_count = 0;
 static uint8_t	said = 0;
+static int	saved_stderr = -1;
 FILE		*err_fp = NULL;
 long int	rm_filepos = -1;
 char		pkgtools_flags[5];
@@ -229,6 +230,7 @@ open_pi_log(void)
 			exit(EXIT_FAILURE);
 		}
 
+		saved_stderr = dup(STDERR_FILENO);
 		dup2(fileno(err_fp), STDERR_FILENO);
 
 		rm_filepos = ftell(err_fp);
@@ -240,6 +242,11 @@ static void
 close_pi_log(int output)
 {
 	if (!verbosity && output) {
+		if (saved_stderr != -1) {
+			dup2(saved_stderr, STDERR_FILENO);
+			close(saved_stderr);
+			saved_stderr = -1;
+		}
 		analyse_pkglog(rm_filepos);
 		printf(MSG_WARNS_ERRS, warn_count, err_count);
 		if (warn_count > 0 || err_count > 0)
@@ -432,9 +439,22 @@ do_pkg_install(Plisthead *installhead)
 
 		log_tag("[%d/%d] %s %s...\n", i++, count, action,
 		    p->ipkg->rpkg->full);
+
+		/*
+		 * Temporarily restore stderr to the terminal so that
+		 * any interactive prompts from pkg_add (e.g. signature
+		 * verification) are visible to the user.
+		 */
+		if (saved_stderr != -1)
+			dup2(saved_stderr, STDERR_FILENO);
+
 		if (fexec(pkg_add, pflags, p->ipkg->pkgfs, NULL)
 		    == EXIT_FAILURE)
 			rc = EXIT_FAILURE;
+
+		/* Redirect stderr back to the logfile */
+		if (!verbosity && err_fp != NULL)
+			dup2(fileno(err_fp), STDERR_FILENO);
 	}
 
 	close_pi_log(1);