#include <string.h>
#include <signal.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#if !defined(NO_CALL_PERSONALITY)
+#include <sys/personality.h>
+#endif
+
#include "verbose.h"
static char key_env_break[] = "AFB_DEBUG_BREAK";
static char key_env_wait[] = "AFB_DEBUG_WAIT";
static char separs[] = ", \t\n";
+/*
+ * Checks whether the 'key' is in the 'list'
+ * Return 1 if it is in or 0 otherwise
+ */
static int has_key(const char *key, const char *list)
{
if (list && key) {
return 0;
}
+static void indicate(const char *key)
+{
+#if !defined(NO_AFB_DEBUG_FILE_INDICATION)
+ char filename[200];
+ int fd;
+
+ snprintf(filename, sizeof filename, "/tmp/afb-debug-%ld", (long)getpid());
+ if (key) {
+ fd = creat(filename, 0644);
+ write(fd, key, strlen(key));
+ close(fd);
+ } else {
+ unlink(filename);
+ }
+#endif
+}
+
static void handler(int signum)
{
}
-void afb_debug(const char *key)
+void afb_debug_wait(const char *key)
{
- enum { None, Break, Wait } action;
+ struct sigaction sa, psa;
+ sigset_t ss, oss;
+
+ key = key ?: "NULL";
+ NOTICE("DEBUG WAIT before %s", key);
+ sigfillset(&ss);
+ sigdelset(&ss, SIGINT);
+ sigprocmask(SIG_SETMASK, &ss, &oss);
+ sigemptyset(&ss);
+ sigaddset(&ss, SIGINT);
+ memset(&sa, 0, sizeof sa);
+ sa.sa_handler = handler;
+ sigaction(SIGINT, &sa, &psa);
+ indicate(key);
+ sigwaitinfo(&ss, NULL);
+ sigaction(SIGINT, &psa, NULL);
+ indicate(NULL);
+ sigprocmask(SIG_SETMASK, &oss, NULL);
+ NOTICE("DEBUG WAIT after %s", key);
+#if !defined(NO_CALL_PERSONALITY)
+ personality((unsigned long)-1L);
+#endif
+}
+
+void afb_debug_break(const char *key)
+{
+ struct sigaction sa, psa;
+
+ key = key ?: "NULL";
+ NOTICE("DEBUG BREAK before %s", key);
+ memset(&sa, 0, sizeof sa);
+ sa.sa_handler = handler;
+ sigaction(SIGINT, &sa, &psa);
+ raise(SIGINT);
+ sigaction(SIGINT, &psa, NULL);
+ NOTICE("DEBUG BREAK after %s", key);
+}
+void afb_debug(const char *key)
+{
+ if (has_key(key, secure_getenv(key_env_wait)))
+ afb_debug_wait(key);
if (has_key(key, secure_getenv(key_env_break)))
- action = Break;
- else if (has_key(key, secure_getenv(key_env_wait)))
- action = Wait;
- else
- action = None;
-
- if (action != None) {
- const char *a = action == Break ? "BREAK" : "WAIT";
- struct sigaction sa, psa;
- sigset_t ss;
-
- NOTICE("DEBUG %s before %s", a, key);
- memset(&sa, 0, sizeof sa);
- sa.sa_handler = handler;
- sigaction(SIGINT, &sa, &psa);
- if (action == Break) {
- raise(SIGINT);
- } else {
- sigemptyset(&ss);
- sigaddset(&ss, SIGINT);
- sigwaitinfo(&ss, NULL);
- }
- sigaction(SIGINT, &psa, NULL);
- NOTICE("DEBUG %s after %s", a, key);
- }
+ afb_debug_break(key);
}
#endif