diff options
Diffstat (limited to 'erts/emulator/sys/unix')
| -rw-r--r-- | erts/emulator/sys/unix/erl_unix_sys.h | 1 | ||||
| -rw-r--r-- | erts/emulator/sys/unix/sys.c | 83 | ||||
| -rw-r--r-- | erts/emulator/sys/unix/sys_drivers.c | 1 |
3 files changed, 78 insertions, 7 deletions
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h index b64b0d87f6..054a4678c8 100644 --- a/erts/emulator/sys/unix/erl_unix_sys.h +++ b/erts/emulator/sys/unix/erl_unix_sys.h @@ -322,6 +322,7 @@ extern SIGFUNC sys_signal(int, SIGFUNC); extern void sys_sigrelease(int); extern void sys_sigblock(int); extern void sys_init_suspend_handler(void); +extern void erts_sys_unix_later_init(void); /* * Handling of floating point exceptions. diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c index 4b2edace0a..7f738751ff 100644 --- a/erts/emulator/sys/unix/sys.c +++ b/erts/emulator/sys/unix/sys.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2016. All Rights Reserved. + * Copyright Ericsson AB 1996-2017. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -119,9 +119,8 @@ erts_smp_atomic_t sys_misc_mem_sz; static void smp_sig_notify(char c); static int sig_notify_fds[2] = {-1, -1}; -#if !defined(ETHR_UNUSABLE_SIGUSRX) && defined(ERTS_THR_HAVE_SIG_FUNCS) +#ifdef ERTS_SYS_SUSPEND_SIGNAL static int sig_suspend_fds[2] = {-1, -1}; -#define ERTS_SYS_SUSPEND_SIGNAL SIGUSR2 #endif #endif @@ -149,11 +148,18 @@ volatile int erts_break_requested = 0; #define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1) #define ERTS_UNSET_BREAK_REQUESTED (erts_break_requested = 0) #endif + +#ifndef ERTS_SMP +volatile Uint erts_signal_sigterm = 0; +#define ERTS_SET_SIGNAL_SIGTERM (erts_signal_sigterm = 1) +#define ERTS_CLEAR_SIGNAL_SIGTERM (erts_signal_sigterm = 0) +#endif + /* set early so the break handler has access to initial mode */ static struct termios initial_tty_mode; static int replace_intr = 0; /* assume yes initially, ttsl_init will clear it */ -int using_oldshell = 1; +int using_oldshell = 1; #ifdef ERTS_ENABLE_KERNEL_POLL @@ -407,6 +413,7 @@ erts_sys_pre_init(void) #ifdef ERTS_THR_HAVE_SIG_FUNCS sigemptyset(&thr_create_sigmask); sigaddset(&thr_create_sigmask, SIGINT); /* block interrupt */ + sigaddset(&thr_create_sigmask, SIGTERM); /* block terminate signal */ sigaddset(&thr_create_sigmask, SIGUSR1); /* block user defined signal */ #endif @@ -655,6 +662,40 @@ static RETSIGTYPE request_break(int signum) #endif } +static void stop_requested(void) { + Process* p = NULL; + Eterm msg, *hp; + ErtsProcLocks locks = 0; + ErlOffHeap *ohp; + Eterm id = erts_whereis_name_to_id(NULL, am_init); + + if ((p = (erts_pid2proc_opt(NULL, 0, id, 0, ERTS_P2P_FLG_INC_REFC))) != NULL) { + ErtsMessage *msgp = erts_alloc_message_heap(p, &locks, 3, &hp, &ohp); + + /* init ! {stop,stop} */ + msg = TUPLE2(hp, am_stop, am_stop); + erts_queue_message(p, locks, msgp, msg, am_system); + + if (locks) + erts_smp_proc_unlock(p, locks); + erts_proc_dec_refc(p); + } +} + +#if (defined(SIG_SIGSET) || defined(SIG_SIGNAL)) +static RETSIGTYPE request_stop(void) +#else +static RETSIGTYPE request_stop(int signum) +#endif +{ +#ifdef ERTS_SMP + smp_sig_notify('S'); +#else + ERTS_SET_SIGNAL_SIGTERM; + ERTS_CHK_IO_AS_INTR(); +#endif +} + static ERTS_INLINE void sigusr1_exit(void) { @@ -750,9 +791,14 @@ static RETSIGTYPE do_quit(int signum) /* Disable break */ void erts_set_ignore_break(void) { - sys_signal(SIGINT, SIG_IGN); - sys_signal(SIGQUIT, SIG_IGN); - sys_signal(SIGTSTP, SIG_IGN); + /* + * Ignore signals that can be sent to the VM by + * typing certain key combinations at the + * controlling terminal... + */ + sys_signal(SIGINT, SIG_IGN); /* Ctrl-C */ + sys_signal(SIGQUIT, SIG_IGN); /* Ctrl-\ */ + sys_signal(SIGTSTP, SIG_IGN); /* Ctrl-Z */ } /* Don't use ctrl-c for break handler but let it be @@ -789,6 +835,19 @@ void sys_init_suspend_handler(void) #endif } +void +erts_sys_unix_later_init(void) +{ + char env[5]; + size_t envsz = sizeof(env); + + if (erts_sys_getenv_raw("ERL_ZZ_SIGTERM_KILL", env, &envsz) == 0) + if (envsz == 4 && sys_strncmp("true", env, 4) == 0) + return; + + sys_signal(SIGTERM, request_stop); +} + int sys_max_files(void) { return(max_files); @@ -922,6 +981,13 @@ void erts_do_break_handling(void) erts_smp_thr_progress_unblock(); } +#ifdef ERTS_SIGNAL_SIGTERM +void erts_handle_signal_sigterm(void) { + ERTS_CLEAR_SIGNAL_SIGTERM; + stop_requested(); +} +#endif + /* Fills in the systems representation of the jam/beam process identifier. ** The Pid is put in STRING representation in the supplied buffer, ** no interpretatione of this should be done by the rest of the @@ -1289,6 +1355,9 @@ signal_dispatcher_thread_func(void *unused) switch (buf[i]) { case 0: /* Emulator initialized */ break; + case 'S': /* SIGTERM */ + stop_requested(); + break; case 'I': /* SIGINT */ break_requested(); break; diff --git a/erts/emulator/sys/unix/sys_drivers.c b/erts/emulator/sys/unix/sys_drivers.c index 400f163652..93cf64719a 100644 --- a/erts/emulator/sys/unix/sys_drivers.c +++ b/erts/emulator/sys/unix/sys_drivers.c @@ -204,6 +204,7 @@ erl_sys_late_init(void) #ifdef ERTS_SMP erts_mtx_unlock(port->lock); #endif + erts_sys_unix_later_init(); /* Need to be called after forker has been started */ } /* II. Prototypes */ |