1 files changed, 110 insertions, 0 deletions
diff --git a/utils/include/pty-session.h b/utils/include/pty-session.h
new file mode 100644
index 0000000..0c9ccc6
--- /dev/null
+++ b/utils/include/pty-session.h
@@ -0,0 +1,110 @@
+/*
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Written by Karel Zak <kzak@redhat.com> in Jul 2019
+ */
+#ifndef UTIL_LINUX_PTY_SESSION_H
+#define UTIL_LINUX_PTY_SESSION_H
+
+#include <pty.h>
+#include <termios.h>
+#include <signal.h>
+#include <sys/time.h>
+
+#include <sys/signalfd.h>
+
+/*
+ * Callbacks -- the first argument is always callback data, see
+ * ul_pty_set_callback_data().
+ */
+struct ul_pty_callbacks {
+	/*
+	 * Optional. Executed on SIGCHLD when ssi_code is EXITED, KILLED or
+	 * DUMPED; The callback has to call ul_pty_set_child(pty, (pid_t) -1)
+	 * if child is no more alive.
+	 */
+	void (*child_wait)(void *, pid_t);
+
+	/*
+	 * Used when child_wait() undefined to informa about child status
+	 */
+	void (*child_die)(void *, pid_t, int);
+
+	/*
+	 * Executed on SIGCHLD when ssi_status is SIGSTOP
+	 */
+	void (*child_sigstop)(void *, pid_t);
+
+	/*
+	 * Executed in master loop before ul_pty enter poll() and in time set by
+	 * ul_pty_set_mainloop_time(). The callback is no used when time is not set.
+	 */
+	int (*mainloop)(void *);
+
+	/*
+	 * Executed on master or stdin activity, arguments:
+	 *   2nd - file descriptor
+	 *   3rd - buffer with data
+	 *   4th - size of the data
+	 */
+	int (*log_stream_activity)(void *, int, char *, size_t);
+
+	/*
+	 * Executed on signal, arguments:
+	 *   2nd - signal info
+	 *   3rd - NULL or signal specific data (e.g. struct winsize on SIGWINCH
+	 */
+	int (*log_signal)(void *, struct signalfd_siginfo *, void *);
+
+	/*
+	 * Executed on SIGUSR1
+	 */
+	int (*flush_logs)(void *);
+};
+
+struct ul_pty {
+	struct termios	stdin_attrs;	/* stdin and slave terminal runtime attributes */
+	int		master;		/* parent side */
+	int		slave;		/* child side */
+	int		sigfd;		/* signalfd() */
+	int		poll_timeout;
+	struct winsize	win;		/* terminal window size */
+	sigset_t	orgsig;		/* original signal mask */
+
+	int		delivered_signal;
+
+	struct ul_pty_callbacks	callbacks;
+	void			*callback_data;
+
+	pid_t		child;
+
+	struct timeval	next_callback_time;
+
+	unsigned int isterm:1,		/* is stdin terminal? */
+		     slave_echo:1;	/* keep ECHO on pty slave */
+};
+
+void ul_pty_init_debug(int mask);
+struct ul_pty *ul_new_pty(int is_stdin_tty);
+void ul_free_pty(struct ul_pty *pty);
+
+void ul_pty_slave_echo(struct ul_pty *pty, int enable);
+int ul_pty_get_delivered_signal(struct ul_pty *pty);
+
+void ul_pty_set_callback_data(struct ul_pty *pty, void *data);
+void ul_pty_set_child(struct ul_pty *pty, pid_t child);
+
+struct ul_pty_callbacks *ul_pty_get_callbacks(struct ul_pty *pty);
+int ul_pty_is_running(struct ul_pty *pty);
+int ul_pty_setup(struct ul_pty *pty);
+void ul_pty_cleanup(struct ul_pty *pty);
+void ul_pty_init_slave(struct ul_pty *pty);
+int ul_pty_proxy_master(struct ul_pty *pty);
+
+void ul_pty_set_mainloop_time(struct ul_pty *pty, struct timeval *tv);
+int ul_pty_get_childfd(struct ul_pty *pty);
+void ul_pty_wait_for_child(struct ul_pty *pty);
+pid_t ul_pty_get_child(struct ul_pty *pty);
+void ul_pty_write_eof_to_child(struct ul_pty *pty);
+
+#endif /* UTIL_LINUX_PTY_H */