Restore pre built-in run_getty() as run_getty2()

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/exec.c

@@ -27,6 +27,7 @@
 #include <ctype.h>		/* isdigit() */
 #include <dirent.h>
 #include <stdarg.h>
+#include <sys/ioctl.h>
 #include <sys/prctl.h>
 #include <sys/wait.h>
 #include <lite/lite.h>
@@ -238,10 +239,63 @@ pid_t run_getty(char *tty, char *speed, char *term, int noclear, int console)
 
 	return pid;
 }
+
+pid_t run_getty2(char *tty, char *cmd, char *args[], int console)
+{
+	pid_t pid;
+
+	pid = fork();
+	if (!pid) {
+		int  i, fd;
+		struct sigaction sa;
+
 		/* Reset signal handlers that were set by the parent process */
+		for (i = 1; i < NSIG; i++)
+			DFLSIG(sa, i, 0);
 
+		/* Detach from initial controlling TTY */
+		vhangup();
 
+		close(STDERR_FILENO);
+		close(STDOUT_FILENO);
+		close(STDIN_FILENO);
 
+		/* Attach TTY to console */
+		fd = open(tty, O_RDWR);
+		if (fd != STDIN_FILENO)
+			exit(1);
+
+		dup2(fd, STDIN_FILENO);
+		dup2(fd, STDOUT_FILENO);
+		dup2(fd, STDERR_FILENO);
+
+		prepare_tty(tty, "getty", console);
+
+		if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) < 0)
+			_pe("Failed TIOCSCTTY");
+
+		while (!fexist(SYNC_SHUTDOWN)) {
+			char c;
+			static const char msg[] = "\nPlease press Enter to activate this console.";
+
+			if (fexist(SYNC_STOPPED)) {
+				sleep(1);
+				continue;
+			}
+
+			(void)write(STDERR_FILENO, msg, sizeof(msg));
+			while (read(STDIN_FILENO, &c, 1) == 1 && c != '\n')
+					continue;
+
+			if (fexist(SYNC_STOPPED))
+				continue;
+
+			execv(cmd, args);
+		}
+
+		close(fd);
+		vhangup();
+		exit(0);
 	}
 
 	return pid;

src/helpers.h

@@ -64,6 +64,7 @@ int     complete        (char *cmd, int pid);
 int     run             (char *cmd);
 int     run_interactive (char *cmd, char *fmt, ...);
 pid_t   run_getty       (char *tty, char *speed, char *term, int noclear, int console);
+pid_t   run_getty2      (char *tty, char *cmd, char *args[], int console);
 int     run_parts       (char *dir, char *cmd);
 
 static inline void create(char *path, mode_t mode, uid_t uid, gid_t gid)