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authorMartin Mares <mj@ucw.cz>1999-02-13 20:43:21 +0100
committerMartin Mares <mj@ucw.cz>1999-02-13 20:43:21 +0100
commit4c9dd1e4b95e273eacc900abb63db4b8bafaf34b (patch)
tree36b8376959e89cecaeefdb7deff04b50cad6cb7f /sysdep/unix
parent1a54b1c6ac5177a1ef21f799f6cf28f355c5bbe9 (diff)
downloadbird-4c9dd1e4b95e273eacc900abb63db4b8bafaf34b.tar
bird-4c9dd1e4b95e273eacc900abb63db4b8bafaf34b.zip
Synchronize signals to the main select/event/timer loop.
Parse command line options.
Diffstat (limited to 'sysdep/unix')
-rw-r--r--sysdep/unix/io.c21
-rw-r--r--sysdep/unix/main.c110
-rw-r--r--sysdep/unix/unix.h8
3 files changed, 116 insertions, 23 deletions
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c
index bb8f8af..d8713f4 100644
--- a/sysdep/unix/io.c
+++ b/sysdep/unix/io.c
@@ -677,6 +677,9 @@ sk_dump_all(void)
* Main I/O Loop
*/
+volatile int async_config_flag; /* Asynchronous reconfiguration/dump scheduled */
+volatile int async_dump_flag;
+
void
io_init(void)
{
@@ -735,6 +738,24 @@ io_loop(void)
}
}
+ /*
+ * Yes, this is racy. But even if the signal comes before this test
+ * and entering select(), it gets caught on the next timer tick.
+ */
+
+ if (async_config_flag)
+ {
+ async_config();
+ async_config_flag = 0;
+ }
+ if (async_dump_flag)
+ {
+ async_dump();
+ async_dump_flag = 0;
+ }
+
+ /* And finally enter select() to find active sockets */
+
hi = select(hi+1, &rd, &wr, NULL, &timo);
if (hi < 0)
{
diff --git a/sysdep/unix/main.c b/sysdep/unix/main.c
index d49b6f0..7b30653 100644
--- a/sysdep/unix/main.c
+++ b/sysdep/unix/main.c
@@ -7,6 +7,7 @@
*/
#include <stdio.h>
+#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/signal.h>
@@ -29,10 +30,10 @@
* Debugging
*/
-static void
-handle_sigusr(int sig)
+void
+async_dump(void)
{
- debug("SIGUSR1: Debugging dump...\n\n");
+ debug("INTERNAL STATE DUMP\n\n");
sk_dump_all();
tm_dump_all();
@@ -45,23 +46,12 @@ handle_sigusr(int sig)
debug("\n");
}
-static void
-signal_init(void)
-{
- static struct sigaction sa;
-
- sa.sa_handler = handle_sigusr;
- sa.sa_flags = SA_RESTART;
- if (sigaction(SIGUSR1, &sa, NULL) < 0)
- die("sigaction: %m");
- signal(SIGPIPE, SIG_IGN);
-}
-
/*
* Reading the Configuration
*/
static int conf_fd;
+static char *config_name = PATH_CONFIG;
static int
cf_read(byte *dest, unsigned int len)
@@ -75,27 +65,101 @@ cf_read(byte *dest, unsigned int len)
static void
read_config(void)
{
- struct config *conf = config_alloc(PATH_CONFIG);
+ struct config *conf = config_alloc(config_name);
- conf_fd = open(PATH_CONFIG, O_RDONLY);
+ conf_fd = open(config_name, O_RDONLY);
if (conf_fd < 0)
- die("Unable to open configuration file " PATH_CONFIG ": %m");
+ die("Unable to open configuration file %s: %m", config_name);
cf_read_hook = cf_read;
if (!config_parse(conf))
- die(PATH_CONFIG ", line %d: %s", conf->err_lino, conf->err_msg);
+ die("%s, line %d: %s", config_name, conf->err_lino, conf->err_msg);
config_commit(conf);
}
+void
+async_config(void)
+{
+ debug("Asynchronous reconfigurations are not supported in demo version\n");
+}
+
+/*
+ * Signals
+ */
+
+static void
+handle_sighup(int sig)
+{
+ debug("Caught SIGHUP...\n");
+ async_config_flag = 1;
+}
+
+static void
+handle_sigusr(int sig)
+{
+ debug("Caught SIGUSR...\n");
+ async_dump_flag = 1;
+}
+
+static void
+signal_init(void)
+{
+ struct sigaction sa;
+
+ bzero(&sa, sizeof(sa));
+ sa.sa_handler = handle_sigusr;
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGUSR1, &sa, NULL);
+ sa.sa_handler = handle_sighup;
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGHUP, &sa, NULL);
+ signal(SIGPIPE, SIG_IGN);
+}
+
+/*
+ * Parsing of command-line arguments
+ */
+
+static char *opt_list = "c:d:";
+
+static void
+usage(void)
+{
+ fprintf(stderr, "Usage: bird [-c <config-file>] [-d <debug-file>]\n");
+ exit(1);
+}
+
+static void
+parse_args(int argc, char **argv)
+{
+ int c;
+
+ while ((c = getopt(argc, argv, opt_list)) >= 0)
+ switch (c)
+ {
+ case 'c':
+ config_name = optarg;
+ break;
+ case 'd':
+ log_init_debug(optarg);
+ break;
+ default:
+ usage();
+ }
+ if (optind < argc)
+ usage();
+}
+
/*
* Hic Est main()
*/
int
-main(void)
+main(int argc, char **argv)
{
- log(L_INFO "Launching BIRD 0.0.0...");
-
log_init_debug(NULL);
+ parse_args(argc, argv);
+
+ log(L_INFO "Launching BIRD 0.0.0...");
debug("Initializing.\n");
resource_init();
@@ -115,7 +179,7 @@ main(void)
protos_start();
ev_run_list(&global_event_list);
- handle_sigusr(0);
+ async_dump();
debug("Entering I/O loop.\n");
diff --git a/sysdep/unix/unix.h b/sysdep/unix/unix.h
index c25f3ed..a79db2e 100644
--- a/sysdep/unix/unix.h
+++ b/sysdep/unix/unix.h
@@ -9,8 +9,16 @@
#ifndef _BIRD_UNIX_H_
#define _BIRD_UNIX_H_
+/* main.c */
+
+void async_config(void);
+void async_dump(void);
+
/* io.c */
+volatile int async_config_flag;
+volatile int async_dump_flag;
+
void io_init(void);
void io_loop(void);
void fill_in_sockaddr(struct sockaddr_in *sa, ip_addr a, unsigned port);