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0f97b8cf36
Our handling of SIGPIPE was incoherent and inconsistent, and we had much cut & paste between the daemons. They should *ALL* ignore SIGPIPE, and much of the rest of the boilerplate can be shared, so should be. Reported-by: @ZmnSCPxj Fixes: #528 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#include <backtrace.h>
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#include <ccan/err/err.h>
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#include <ccan/str/str.h>
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#include <common/dev_disconnect.h>
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#include <common/status.h>
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#include <common/subdaemon.h>
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#include <common/utils.h>
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#include <common/version.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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static struct backtrace_state *backtrace_state;
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static int backtrace_status(void *unused, uintptr_t pc,
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const char *filename, int lineno,
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const char *function)
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{
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status_trace("backtrace: %s:%u (%s) %p",
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filename, lineno, function, (void *)pc);
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return 0;
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}
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static void crashdump(int sig)
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{
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/* We do stderr first, since it's most reliable. */
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warnx("Fatal signal %u", sig);
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backtrace_print(backtrace_state, 0, stderr);
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/* Now send to parent. */
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backtrace_full(backtrace_state, 0, backtrace_status, NULL, NULL);
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status_failed(STATUS_FAIL_INTERNAL_ERROR, "FATAL SIGNAL %u", sig);
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}
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static void crashlog_activate(void)
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{
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struct sigaction sa;
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sa.sa_handler = crashdump;
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sigemptyset(&sa.sa_mask);
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/* We want to fall through to default handler */
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sa.sa_flags = SA_RESETHAND;
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sigaction(SIGILL, &sa, NULL);
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sigaction(SIGABRT, &sa, NULL);
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sigaction(SIGFPE, &sa, NULL);
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sigaction(SIGSEGV, &sa, NULL);
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sigaction(SIGBUS, &sa, NULL);
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}
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void subdaemon_setup(int argc, char *argv[])
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{
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#if DEVELOPER
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int i;
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bool printed = false;
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#endif
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if (argc == 2 && streq(argv[1], "--version")) {
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printf("%s\n", version());
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exit(0);
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}
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err_set_progname(argv[0]);
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backtrace_state = backtrace_create_state(argv[0], 0, NULL, NULL);
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crashlog_activate();
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/* We handle write returning errors! */
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signal(SIGPIPE, SIG_IGN);
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secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
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| SECP256K1_CONTEXT_SIGN);
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#if DEVELOPER
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for (i = 1; i < argc; i++) {
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if (strstarts(argv[i], "--dev-disconnect=")) {
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dev_disconnect_init(atoi(argv[i]
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+ strlen("--dev-disconnect=")));
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}
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}
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/* From debugger, tell gdb "return". */
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for (i = 1; i < argc; i++) {
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while (streq(argv[i], "--debugger")) {
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if (!printed)
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fprintf(stderr, "gdb -ex 'attach %u' %s\n",
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getpid(), argv[0]);
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printed = true;
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}
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}
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#endif
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}
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