Check for and use POSIX signal/setjmp/longjmp

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5808 dc483132-0cff-0310-8789-dd5450dbe970

4 files changed, 64 insertions, 2 deletions

diff --git a/src/kadmin/v5server/configure.in b/src/kadmin/v5server/configure.in
index e5a097e0d..727935e05 100644
--- a/src/kadmin/v5server/configure.in
+++ b/src/kadmin/v5server/configure.in
@@ -8,6 +8,8 @@ AC_CHECK_LIB(ndbm,main)
 AC_CHECK_LIB(dbm,main)
 AC_FUNC_CHECK(waitpid,AC_DEFINE(HAVE_WAITPID))
 AC_FUNC_CHECK(vsprintf,AC_DEFINE(HAVE_VSPRINTF))
+CHECK_SIGNALS
+CHECK_SETJMP
 CHECK_WAIT_TYPE
 ET_RULES
 KRB_INCLUDE
diff --git a/src/kadmin/v5server/proto_serv.c b/src/kadmin/v5server/proto_serv.c
index 8def48c6a..f88811ae3 100644
--- a/src/kadmin/v5server/proto_serv.c
+++ b/src/kadmin/v5server/proto_serv.c
@@ -57,7 +57,11 @@ static jmp_buf	timeout_jmp;
 static krb5_sigtype
 proto_alarmclock()
 {
+#if	POSIX_SETJMP
+    siglongjmp(timeout_jmp, 1);
+#else	/* POSIX_SETJMP */
     longjmp(timeout_jmp, 1);
+#endif	/* POSIX_SETJMP */
     /* NOTREACHED */
 }
 
@@ -108,6 +112,10 @@ proto_serv(kcontext, my_id, cl_sock, sv_p, cl_p)
     krb5_address	*local;
     krb5_address	*remote;
 
+#if	POSIX_SIGNALS
+    struct sigaction	s_action;
+#endif	/* POSIX_SIGNALS */
+
     char		*curr_lang = (char *) NULL;
     krb5_boolean	mime_setting = 0;
 
@@ -130,6 +138,10 @@ proto_serv(kcontext, my_id, cl_sock, sv_p, cl_p)
     remote = (krb5_address *) NULL;
     ticket = (krb5_ticket *) NULL;
     rcache = (krb5_rcache) NULL;
+#if	POSIX_SIGNALS
+    (void) sigemptyset(&s_action.sa_mask);
+    s_action.sa_flags = 0;
+#endif	/* POSIX_SIGNALS */
 
     /* Get memory for addresses */
     local = (krb5_address *) malloc(sizeof(krb5_address));
@@ -240,9 +252,20 @@ proto_serv(kcontext, my_id, cl_sock, sv_p, cl_p)
      *
      * If enabled, the protocol times out after proto_proto_timeout seconds.
      */
-    if (setjmp(timeout_jmp) == 0) {
+    if (
+#if	POSIX_SETJMP
+	sigsetjmp(timeout_jmp, 1) == 0
+#else	/* POSIX_SETJMP */
+	setjmp(timeout_jmp) == 0
+#endif	/* POSIX_SETJMP */
+	) {
 	if (proto_proto_timeout > 0) {
+#if	POSIX_SIGNALS
+	    s_action.sa_handler = proto_alarmclock;
+	    (void) sigaction(SIGALRM, &s_action, (struct sigaction *) NULL);
+#else	/* POSIX_SIGNALS */
 	    signal(SIGALRM, proto_alarmclock);
+#endif	/* POSIX_SIGNALS */
 	}
 	/*
 	 * Loop forever - or until somebody puts us out of our misery.
diff --git a/src/kadmin/v5server/srv_acl.c b/src/kadmin/v5server/srv_acl.c
index 1e320daf1..583543459 100644
--- a/src/kadmin/v5server/srv_acl.c
+++ b/src/kadmin/v5server/srv_acl.c
@@ -373,6 +373,9 @@ acl_init(kcontext, debug_level, acl_file)
     char		*acl_file;
 {
     krb5_error_code	kret;
+#if	POSIX_SIGNALS
+    struct sigaction	s_action;
+#endif	/* POSIX_SIGNALS */
 
     kret = 0;
     acl_debug_level = debug_level;
@@ -381,7 +384,14 @@ acl_init(kcontext, debug_level, acl_file)
 	    ((acl_file) ? acl_file : "(null)")));
     acl_acl_file = (acl_file) ? acl_file : (char *) acl_default_file;
     acl_inited = acl_load_acl_file();
+#if	POSIX_SIGNALS
+    (void) sigemptyset(&s_action.sa_mask);
+    s_action.sa_flags = 0;
+    s_action.sa_handler = acl_reload_acl_file;
+    (void) sigaction(SIGALRM, &s_action, (struct sigaction *) NULL);
+#else	/* POSIX_SIGNALS */
     signal(SIGHUP, acl_reload_acl_file);
+#endif	/* POSIX_SIGNALS */
     DPRINT(DEBUG_CALLS, acl_debug_level, ("X acl_init() = %d\n", kret));
     return(kret);
 }
diff --git a/src/kadmin/v5server/srv_main.c b/src/kadmin/v5server/srv_main.c
index 6cd0af8ef..8ce9e6ce4 100644
--- a/src/kadmin/v5server/srv_main.c
+++ b/src/kadmin/v5server/srv_main.c
@@ -87,7 +87,11 @@ static krb5_sigtype
 unhandled_signal(signo)
     int signo;
 {
+#if	POSIX_SETJMP
+    siglongjmp(terminal_jmp, signo);
+#else	/* POSIX_SETJMP */
     longjmp(terminal_jmp, signo);
+#endif	/* POSIX_SETJMP */
     /* NOTREACHED */
 }
 
@@ -279,10 +283,32 @@ main(argc, argv)
     openlog(programname, LOG_AUTH|LOG_CONS|LOG_NDELAY|LOG_PID, LOG_LOCAL6);
     (void) set_com_err_hook(kadm_com_err_proc);
 
-    if ((signal_number = setjmp(terminal_jmp)) == 0) {
+    if ((signal_number =
+#if	POSIX_SETJMP
+	 sigsetjmp(terminal_jmp, 1)
+#else	/* POSIX_SETJMP */
+	 setjmp(terminal_jmp)
+#endif	/* POSIX_SETJMP */
+	 ) == 0) {
+#if	POSIX_SIGNALS
+	struct sigaction s_action;
+#endif	/* POSIX_SIGNALS */
+
 	/*
 	 * Initialize signal handling.
 	 */
+#if	POSIX_SIGNALS
+	(void) sigemptyset(&s_action.sa_mask);
+	s_action.sa_flags = 0;
+	s_action.sa_handler = unhandled_signal;
+	(void) sigaction(SIGINT, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGTERM, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGHUP, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGQUIT, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGPIPE, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGALRM, &s_action, (struct sigaction *) NULL);
+	(void) sigaction(SIGCHLD, &s_action, (struct sigaction *) NULL);
+#else	/* POSIX_SIGNALS */
 	signal(SIGINT, unhandled_signal);
 	signal(SIGTERM, unhandled_signal);
 	signal(SIGHUP, unhandled_signal);
@@ -290,6 +316,7 @@ main(argc, argv)
 	signal(SIGPIPE, unhandled_signal);
 	signal(SIGALRM, unhandled_signal);
 	signal(SIGCHLD, unhandled_signal);
+#endif	/* POSIX_SIGNALS */
 
 	/*
 	 * Initialize our modules.