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#include <stdbool.h>
#include <uv.h>
#include "nvim/types.h"
#include "nvim/ascii.h"
#include "nvim/vim.h"
#include "nvim/globals.h"
#include "nvim/memline.h"
#include "nvim/eval.h"
#include "nvim/term.h"
#include "nvim/memory.h"
#include "nvim/misc1.h"
#include "nvim/misc2.h"
#include "nvim/os/event_defs.h"
#include "nvim/os/event.h"
#include "nvim/os/signal.h"
static uv_signal_t sint, spipe, shup, squit, sterm, swinch;
#ifdef SIGPWR
static uv_signal_t spwr;
#endif
static bool rejecting_deadly;
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "os/signal.c.generated.h"
#endif
void signal_init(void)
{
uv_signal_init(uv_default_loop(), &sint);
uv_signal_init(uv_default_loop(), &spipe);
uv_signal_init(uv_default_loop(), &shup);
uv_signal_init(uv_default_loop(), &squit);
uv_signal_init(uv_default_loop(), &sterm);
uv_signal_init(uv_default_loop(), &swinch);
uv_signal_start(&sint, signal_cb, SIGINT);
uv_signal_start(&spipe, signal_cb, SIGPIPE);
uv_signal_start(&shup, signal_cb, SIGHUP);
uv_signal_start(&squit, signal_cb, SIGQUIT);
uv_signal_start(&sterm, signal_cb, SIGTERM);
uv_signal_start(&swinch, signal_cb, SIGWINCH);
#ifdef SIGPWR
uv_signal_init(uv_default_loop(), &spwr);
uv_signal_start(&spwr, signal_cb, SIGPWR);
#endif
}
void signal_stop(void)
{
uv_signal_stop(&sint);
uv_signal_stop(&spipe);
uv_signal_stop(&shup);
uv_signal_stop(&squit);
uv_signal_stop(&sterm);
uv_signal_stop(&swinch);
#ifdef SIGPWR
uv_signal_stop(&spwr);
#endif
}
void signal_reject_deadly(void)
{
rejecting_deadly = true;
}
void signal_accept_deadly(void)
{
rejecting_deadly = false;
}
void signal_handle(Event event)
{
int signum = event.data.signum;
switch (signum) {
case SIGINT:
got_int = true;
break;
#ifdef SIGPWR
case SIGPWR:
// Signal of a power failure(eg batteries low), flush the swap files to
// be safe
ml_sync_all(false, false);
break;
#endif
case SIGPIPE:
// Ignore
break;
case SIGWINCH:
shell_resized();
break;
case SIGTERM:
case SIGQUIT:
case SIGHUP:
if (!rejecting_deadly) {
deadly_signal(signum);
}
break;
default:
fprintf(stderr, "Invalid signal %d", signum);
break;
}
}
EventSource signal_event_source(void)
{
return &sint;
}
static char * signal_name(int signum)
{
switch (signum) {
case SIGINT:
return "SIGINT";
#ifdef SIGPWR
case SIGPWR:
return "SIGPWR";
#endif
case SIGPIPE:
return "SIGPIPE";
case SIGWINCH:
return "SIGWINCH";
case SIGTERM:
return "SIGTERM";
case SIGQUIT:
return "SIGQUIT";
case SIGHUP:
return "SIGHUP";
default:
return "Unknown";
}
}
// This function handles deadly signals.
// It tries to preserve any swap files and exit properly.
// (partly from Elvis).
// NOTE: Avoid unsafe functions, such as allocating memory, they can result in
// a deadlock.
static void deadly_signal(int signum)
{
// Set the v:dying variable.
set_vim_var_nr(VV_DYING, 1);
snprintf((char *)IObuff, sizeof(IObuff), "Vim: Caught deadly signal '%s'\n",
signal_name(signum));
// Preserve files and exit.
preserve_exit();
}
static void signal_cb(uv_signal_t *handle, int signum)
{
if (rejecting_deadly) {
if (signum == SIGINT) {
got_int = true;
}
return;
}
Event event = {
.source = signal_event_source(),
.type = kEventSignal,
.data = {
.signum = signum
}
};
event_push(event);
}
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