exec: hangup/reset/deallocate VTs in gettys

Explicitly disconnect all clients from a VT when a getty starts/finishes
(requires TIOCVHANGUP, available in 2.6.29).

Explicitly deallocate getty VTs in order to flush scrollback buffer.

Explicitly reset terminals to a defined state before spawning getty.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/util.h b/src/util.h
index 79e98be20b..04049f7d92 100644
--- a/src/util.h
+++ b/src/util.h
@@ -315,7 +315,9 @@ int chvt(int vt);
 int read_one_char(FILE *f, char *ret, bool *need_nl);
 int ask(char *ret, const char *replies, const char *text, ...);
 
-int reset_terminal(int fd);
+int reset_terminal_fd(int fd);
+int reset_terminal(const char *name);
+
 int open_terminal(const char *name, int mode);
 int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm);
 int release_terminal(void);
@@ -411,6 +413,11 @@ char* hostname_cleanup(char *s);
 
 char* strshorten(char *s, size_t l);
 
+int terminal_vhangup_fd(int fd);
+int terminal_vhangup(const char *name);
+
+int vt_disallocate(const char *name);
+
 #define NULSTR_FOREACH(i, l)                                    \
         for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)