621 lines
16 KiB
C
621 lines
16 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <unistd.h>
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#include <assert.h>
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#include "Ecore.h"
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#include "ecore_private.h"
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/* make mono happy - this is evil though... */
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#undef SIGPWR
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/* valgrind in some versions/setups uses SIGRT's... hmmm */
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#undef SIGRTMIN
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typedef void (*Signal_Handler)(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_set(int sig, Signal_Handler func);
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static void _ecore_signal_callback_ignore(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigchld(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigusr1(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigusr2(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sighup(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigquit(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigint(int sig, siginfo_t *si, void *foo);
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static void _ecore_signal_callback_sigterm(int sig, siginfo_t *si, void *foo);
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#ifdef SIGPWR
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static void _ecore_signal_callback_sigpwr(int sig, siginfo_t *si, void *foo);
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#endif
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#ifdef SIGRTMIN
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static void _ecore_signal_callback_sigrt(int sig, siginfo_t *si, void *foo);
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#endif
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static Eina_Bool _ecore_signal_exe_exit_delay(void *data);
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//#define MAXSIGQ 256 // 32k
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#define MAXSIGQ 64 // 8k
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static volatile sig_atomic_t sig_count = 0;
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static volatile sig_atomic_t sigchld_count = 0;
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static volatile sig_atomic_t sigusr1_count = 0;
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static volatile sig_atomic_t sigusr2_count = 0;
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static volatile sig_atomic_t sighup_count = 0;
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static volatile sig_atomic_t sigquit_count = 0;
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static volatile sig_atomic_t sigint_count = 0;
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static volatile sig_atomic_t sigterm_count = 0;
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#ifdef SIGPWR
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static volatile sig_atomic_t sigpwr_count = 0;
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#endif
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#ifdef SIGRTMIN
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static volatile sig_atomic_t *sigrt_count = NULL;
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#endif
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static volatile siginfo_t sigchld_info[MAXSIGQ];
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static volatile siginfo_t sigusr1_info[MAXSIGQ];
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static volatile siginfo_t sigusr2_info[MAXSIGQ];
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static volatile siginfo_t sighup_info[MAXSIGQ];
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static volatile siginfo_t sigquit_info[MAXSIGQ];
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static volatile siginfo_t sigint_info[MAXSIGQ];
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static volatile siginfo_t sigterm_info[MAXSIGQ];
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#ifdef SIGPWR
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static volatile siginfo_t sigpwr_info[MAXSIGQ];
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#endif
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#ifdef SIGRTMIN
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static volatile siginfo_t *sigrt_info[MAXSIGQ];
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#endif
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void
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_ecore_signal_shutdown(void)
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{
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#ifdef SIGRTMIN
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int i, num = SIGRTMAX - SIGRTMIN;
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#endif
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_ecore_signal_callback_set(SIGPIPE, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGALRM, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGCHLD, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGUSR1, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGUSR2, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGHUP, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGQUIT, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGINT, (Signal_Handler) SIG_DFL);
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_ecore_signal_callback_set(SIGTERM, (Signal_Handler) SIG_DFL);
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#ifdef SIGPWR
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_ecore_signal_callback_set(SIGPWR, (Signal_Handler) SIG_DFL);
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sigpwr_count = 0;
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#endif
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sigchld_count = 0;
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sigusr1_count = 0;
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sigusr2_count = 0;
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sighup_count = 0;
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sigquit_count = 0;
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sigint_count = 0;
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sigterm_count = 0;
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sig_count = 0;
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#ifdef SIGRTMIN
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for (i = 0; i < num; i++)
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{
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_ecore_signal_callback_set(SIGRTMIN + i, (Signal_Handler) SIG_DFL);
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sigrt_count[i] = 0;
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}
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if (sigrt_count)
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{
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free((sig_atomic_t *) sigrt_count);
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sigrt_count = NULL;
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}
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for (i = 0; i < MAXSIGQ; i++)
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{
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if (sigrt_info[i])
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{
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free((siginfo_t *) sigrt_info[i]);
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sigrt_info[i] = NULL;
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}
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}
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#endif
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}
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void
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_ecore_signal_init(void)
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{
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#ifdef SIGRTMIN
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int i, num = SIGRTMAX - SIGRTMIN;
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#endif
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_ecore_signal_callback_set(SIGPIPE, _ecore_signal_callback_ignore);
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_ecore_signal_callback_set(SIGALRM, _ecore_signal_callback_ignore);
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_ecore_signal_callback_set(SIGCHLD, _ecore_signal_callback_sigchld);
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_ecore_signal_callback_set(SIGUSR1, _ecore_signal_callback_sigusr1);
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_ecore_signal_callback_set(SIGUSR2, _ecore_signal_callback_sigusr2);
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_ecore_signal_callback_set(SIGHUP, _ecore_signal_callback_sighup);
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_ecore_signal_callback_set(SIGQUIT, _ecore_signal_callback_sigquit);
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_ecore_signal_callback_set(SIGINT, _ecore_signal_callback_sigint);
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_ecore_signal_callback_set(SIGTERM, _ecore_signal_callback_sigterm);
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#ifdef SIGPWR
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_ecore_signal_callback_set(SIGPWR, _ecore_signal_callback_sigpwr);
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#endif
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#ifdef SIGRTMIN
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sigrt_count = calloc(1, sizeof(sig_atomic_t) * num);
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assert(sigrt_count);
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for (i = 0; i < MAXSIGQ; i++)
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{
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sigrt_info[i] = calloc(1, sizeof(siginfo_t) * num);
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assert(sigrt_info[i]);
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}
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for (i = 0; i < num; i++)
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_ecore_signal_callback_set(SIGRTMIN + i, _ecore_signal_callback_sigrt);
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#endif
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}
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int
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_ecore_signal_count_get(void)
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{
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return sig_count;
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}
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void
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_ecore_signal_call(void)
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{
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#ifdef SIGRTMIN
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int i, num = SIGRTMAX - SIGRTMIN;
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#endif
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volatile sig_atomic_t n;
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sigset_t oldset, newset;
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if (sig_count == 0) return;
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sigemptyset(&newset);
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sigaddset(&newset, SIGPIPE);
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sigaddset(&newset, SIGALRM);
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sigaddset(&newset, SIGCHLD);
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sigaddset(&newset, SIGUSR1);
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sigaddset(&newset, SIGUSR2);
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sigaddset(&newset, SIGHUP);
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sigaddset(&newset, SIGQUIT);
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sigaddset(&newset, SIGINT);
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sigaddset(&newset, SIGTERM);
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#ifdef SIGPWR
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sigaddset(&newset, SIGPWR);
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#endif
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#ifdef SIGRTMIN
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for (i = 0; i < num; i++)
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sigaddset(&newset, SIGRTMIN + i);
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#endif
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sigprocmask(SIG_BLOCK, &newset, &oldset);
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if (sigchld_count > MAXSIGQ)
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WRN("%i SIGCHLD in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigchld_count, MAXSIGQ);
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for (n = 0; n < sigchld_count; n++)
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{
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pid_t pid;
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int status;
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while ((pid = waitpid(-1, &status, WNOHANG)) > 0)
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{
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Ecore_Exe_Event_Del *e;
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/* FIXME: If this process is set respawn, respawn with a suitable backoff
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* period for those that need too much respawning.
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*/
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e = _ecore_exe_event_del_new();
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if (e)
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{
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if (WIFEXITED(status))
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{
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e->exit_code = WEXITSTATUS(status);
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e->exited = 1;
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}
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else if (WIFSIGNALED(status))
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{
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e->exit_signal = WTERMSIG(status);
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e->signalled = 1;
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}
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e->pid = pid;
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e->exe = _ecore_exe_find(pid);
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if ((n < MAXSIGQ) && (sigchld_info[n].si_signo))
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e->data = sigchld_info[n]; /* No need to clone this. */
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if ((e->exe) && (ecore_exe_flags_get(e->exe) & (ECORE_EXE_PIPE_READ | ECORE_EXE_PIPE_ERROR)))
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{
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/* We want to report the Last Words of the exe, so delay this event.
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* This is twice as relevant for stderr.
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* There are three possibilities here -
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* 1 There are no Last Words.
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* 2 There are Last Words, they are not ready to be read.
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* 3 There are Last Words, they are ready to be read.
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*
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* For 1 we don't want to delay, for 3 we want to delay.
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* 2 is the problem. If we check for data now and there
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* is none, then there is no way to differentiate 1 and 2.
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* If we don't delay, we may loose data, but if we do delay,
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* there may not be data and the exit event never gets sent.
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*
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* Any way you look at it, there has to be some time passed
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* before the exit event gets sent. So the strategy here is
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* to setup a timer event that will send the exit event after
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* an arbitrary, but brief, time.
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*
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* This is probably paranoid, for the less paraniod, we could
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* check to see for Last Words, and only delay if there are any.
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* This has it's own set of problems.
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*/
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Ecore_Timer *doomsday_clock;
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doomsday_clock = _ecore_exe_doomsday_clock_get(e->exe);
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IF_FN_DEL(ecore_timer_del, doomsday_clock);
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_ecore_exe_doomsday_clock_set(e->exe, ecore_timer_add(0.1, _ecore_signal_exe_exit_delay, e));
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}
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else
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{
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_ecore_event_add(ECORE_EXE_EVENT_DEL, e,
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_ecore_exe_event_del_free, NULL);
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}
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}
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}
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sig_count--;
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}
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sigchld_count = 0;
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if (sigusr1_count > MAXSIGQ)
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WRN("%i SIGUSR1 in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigusr1_count, MAXSIGQ);
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for (n = 0; n < sigusr1_count; n++)
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{
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Ecore_Event_Signal_User *e;
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e = _ecore_event_signal_user_new();
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if (e)
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{
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e->number = 1;
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if ((n < MAXSIGQ) && (sigusr1_info[n].si_signo))
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e->data = sigusr1_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_USER, e, NULL, NULL);
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}
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sig_count--;
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}
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sigusr1_count = 0;
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if (sigusr2_count > MAXSIGQ)
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WRN("%i SIGUSR2 in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigusr2_count, MAXSIGQ);
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for (n = 0; n < sigusr2_count; n++)
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{
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Ecore_Event_Signal_User *e;
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e = _ecore_event_signal_user_new();
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if (e)
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{
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e->number = 2;
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if ((n < MAXSIGQ) && (sigusr2_info[n].si_signo))
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e->data = sigusr2_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_USER, e, NULL, NULL);
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}
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sig_count--;
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}
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sigusr2_count = 0;
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if (sighup_count > MAXSIGQ)
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WRN("%i SIGHUP in queue. max queue size %i. losing "
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"siginfo for extra signals.", sighup_count, MAXSIGQ);
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for (n = 0; n < sighup_count; n++)
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{
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Ecore_Event_Signal_Hup *e;
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e = _ecore_event_signal_hup_new();
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if (e)
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{
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if ((n < MAXSIGQ) && (sighup_info[n].si_signo))
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e->data = sighup_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_HUP, e, NULL, NULL);
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}
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sig_count--;
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}
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sighup_count = 0;
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if (sigquit_count > MAXSIGQ)
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WRN("%i SIGQUIT in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigquit_count, MAXSIGQ);
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for (n = 0; n < sigquit_count; n++)
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{
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Ecore_Event_Signal_Exit *e;
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e = _ecore_event_signal_exit_new();
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if (e)
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{
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e->quit = 1;
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if ((n < MAXSIGQ) && (sigquit_info[n].si_signo))
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e->data = sigquit_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_EXIT, e, NULL, NULL);
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}
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sig_count--;
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}
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sigquit_count = 0;
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if (sigint_count > MAXSIGQ)
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WRN("%i SIGINT in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigint_count, MAXSIGQ);
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for (n = 0; n < sigint_count; n++)
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{
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Ecore_Event_Signal_Exit *e;
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e = _ecore_event_signal_exit_new();
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if (e)
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{
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e->interrupt = 1;
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if ((n < MAXSIGQ) && (sigint_info[n].si_signo))
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e->data = sigint_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_EXIT, e, NULL, NULL);
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}
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sig_count--;
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}
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sigint_count = 0;
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if (sigterm_count > MAXSIGQ)
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WRN("%i SIGTERM in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigterm_count, MAXSIGQ);
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for (n = 0; n < sigterm_count; n++)
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{
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Ecore_Event_Signal_Exit *e;
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e = _ecore_event_signal_exit_new();
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if (e)
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{
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e->terminate = 1;
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if ((n < MAXSIGQ) && (sigterm_info[n].si_signo))
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e->data = sigterm_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_EXIT, e, NULL, NULL);
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}
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sig_count--;
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}
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sigterm_count = 0;
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#ifdef SIGPWR
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if (sigpwr_count > MAXSIGQ)
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WRN("%i SIGPWR in queue. max queue size %i. losing "
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"siginfo for extra signals.", sigpwr_count, MAXSIGQ);
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for (n = 0; n < sigpwr_count; n++)
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{
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Ecore_Event_Signal_Power *e;
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e = _ecore_event_signal_power_new();
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if (e)
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{
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if ((n < MAXSIGQ) && (sigpwr_info[n].si_signo))
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e->data = sigpwr_info[n];
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ecore_event_add(ECORE_EVENT_SIGNAL_POWER, e, NULL, NULL);
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}
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sig_count--;
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}
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sigpwr_count = 0;
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#endif
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#ifdef SIGRTMIN
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for (i = 0; i < num; i++)
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{
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if (sigrt_count[i] > MAXSIGQ)
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WRN("%i SIGRT%i in queue. max queue size %i. losing "
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"siginfo for extra signals.", i + 1, sigrt_count[i], MAXSIGQ);
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for (n = 0; n < sigrt_count[i]; n++)
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{
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Ecore_Event_Signal_Realtime *e;
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if ((e = _ecore_event_signal_realtime_new()))
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{
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e->num = i;
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if ((n < MAXSIGQ) && (sigrt_info[n][i].si_signo))
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e->data = sigrt_info[n][i];
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ecore_event_add(ECORE_EVENT_SIGNAL_REALTIME, e, NULL, NULL);
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}
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sig_count--;
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}
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sigrt_count[i] = 0;
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}
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#endif
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sigprocmask(SIG_SETMASK, &oldset, NULL);
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}
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static void
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_ecore_signal_callback_set(int sig, Signal_Handler func)
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{
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struct sigaction sa;
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sa.sa_sigaction = func;
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sa.sa_flags = SA_RESTART | SA_SIGINFO;
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sigemptyset(&sa.sa_mask);
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sigaction(sig, &sa, NULL);
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}
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static void
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_ecore_signal_callback_ignore(int sig __UNUSED__, siginfo_t *si __UNUSED__, void *foo __UNUSED__)
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{
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}
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static void
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_ecore_signal_callback_sigchld(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
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{
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volatile sig_atomic_t n;
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n = sigchld_count;
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if (n < MAXSIGQ)
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{
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if (si)
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sigchld_info[n] = *si;
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else
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sigchld_info[n].si_signo = 0;
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}
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sigchld_count++;
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sig_count++;
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}
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static void
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_ecore_signal_callback_sigusr1(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
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{
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volatile sig_atomic_t n;
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n = sigchld_count;
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if (n < MAXSIGQ)
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{
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if (si)
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sigusr1_info[n] = *si;
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else
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sigusr1_info[n].si_signo = 0;
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}
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|
sigusr1_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
static void
|
|
_ecore_signal_callback_sigusr2(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigusr2_info[n] = *si;
|
|
else
|
|
sigusr2_info[n].si_signo = 0;
|
|
}
|
|
sigusr2_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
static void
|
|
_ecore_signal_callback_sighup(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sighup_info[n] = *si;
|
|
else
|
|
sighup_info[n].si_signo = 0;
|
|
}
|
|
sighup_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
static void
|
|
_ecore_signal_callback_sigquit(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigquit_info[n] = *si;
|
|
else
|
|
sigquit_info[n].si_signo = 0;
|
|
}
|
|
sigquit_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
static void
|
|
_ecore_signal_callback_sigint(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigint_info[n] = *si;
|
|
else
|
|
sigint_info[n].si_signo = 0;
|
|
}
|
|
sigint_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
static void
|
|
_ecore_signal_callback_sigterm(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigterm_info[n] = *si;
|
|
else
|
|
sigterm_info[n].si_signo = 0;
|
|
}
|
|
sigterm_count++;
|
|
sig_count++;
|
|
}
|
|
|
|
#ifdef SIGPWR
|
|
static void
|
|
_ecore_signal_callback_sigpwr(int sig __UNUSED__, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigpwr_info[n] = *si;
|
|
else
|
|
sigpwr_info[n].si_signo = 0;
|
|
}
|
|
sigpwr_count++;
|
|
sig_count++;
|
|
}
|
|
#endif
|
|
|
|
#ifdef SIGRTMIN
|
|
static void
|
|
_ecore_signal_callback_sigrt(int sig, siginfo_t *si, void *foo __UNUSED__)
|
|
{
|
|
volatile sig_atomic_t n;
|
|
n = sigchld_count;
|
|
if (n < MAXSIGQ)
|
|
{
|
|
if (si)
|
|
sigrt_info[n][sig - SIGRTMIN] = *si;
|
|
else
|
|
sigrt_info[n][sig - SIGRTMIN].si_signo = 0;
|
|
}
|
|
sigrt_count[sig - SIGRTMIN]++;
|
|
sig_count++;
|
|
}
|
|
#endif
|
|
|
|
static Eina_Bool
|
|
_ecore_signal_exe_exit_delay(void *data)
|
|
{
|
|
Ecore_Exe_Event_Del *e;
|
|
|
|
e = data;
|
|
if (e)
|
|
{
|
|
_ecore_exe_doomsday_clock_set(e->exe, NULL);
|
|
_ecore_event_add(ECORE_EXE_EVENT_DEL, e,
|
|
_ecore_exe_event_del_free, NULL);
|
|
}
|
|
return ECORE_CALLBACK_CANCEL;
|
|
}
|