write main process pid to /var/run/kore.pid (changable in configuration)

example/src/example.c

@@ -56,7 +56,7 @@ serve_style_css(struct http_request *req)
 		tstamp = kore_date_to_time(date);
 		free(date);
 
-		kore_log("header was present with %ld", tstamp);
+		kore_debug("header was present with %ld", tstamp);
 	}
 
 	tstamp = 0;

includes/kore.h

@@ -24,6 +24,8 @@
 #define errno_s			strerror(errno)
 #define ssl_errno_s		ERR_error_string(ERR_get_error(), NULL)
 
+#define KORE_PIDFILE_DEFAULT	"/var/run/kore.pid"
+
 //#define KORE_DEBUG		1
 #if defined(KORE_DEBUG)
 #define kore_debug(fmt, ...)	\
@@ -132,6 +134,7 @@ extern char	*server_ip;
 extern char	*chroot_path;
 extern char	*runas_user;
 extern char	*kore_module_onload;
+extern char	*kore_pidfile;
 extern u_int8_t	worker_count;
 extern pid_t	mypid;
 

src/config.c

@@ -38,14 +38,15 @@
 #include "spdy.h"
 #include "kore.h"
 
-static int			configure_bind(char **);
-static int			configure_load(char **);
-static int			configure_onload(char **);
-static int			configure_handler(char **);
-static int			configure_domain(char **);
-static int			configure_chroot(char **);
-static int			configure_runas(char **);
-static int			configure_workers(char **);
+static int		configure_bind(char **);
+static int		configure_load(char **);
+static int		configure_onload(char **);
+static int		configure_handler(char **);
+static int		configure_domain(char **);
+static int		configure_chroot(char **);
+static int		configure_runas(char **);
+static int		configure_workers(char **);
+static int		configure_pidfile(char **);
 
 static struct {
 	const char		*name;
@@ -60,6 +61,7 @@ static struct {
 	{ "chroot",		configure_chroot },
 	{ "runas",		configure_runas },
 	{ "workers",		configure_workers },
+	{ "pidfile",		configure_pidfile },
 	{ NULL,			NULL },
 };
 
@@ -250,3 +252,18 @@ configure_workers(char **argv)
 
 	return (KORE_RESULT_OK);
 }
+
+static int
+configure_pidfile(char **argv)
+{
+	if (argv[1] == NULL)
+		return (KORE_RESULT_ERROR);
+
+	if (strcmp(kore_pidfile, KORE_PIDFILE_DEFAULT)) {
+		kore_debug("duplicate pidfile directive specified");
+		return (KORE_RESULT_ERROR);
+	}
+
+	kore_pidfile = kore_strdup(argv[1]);
+	return (KORE_RESULT_OK);
+}

src/kore.c

@@ -60,16 +60,18 @@ static struct passwd			*pw = NULL;
 static u_int16_t			workerid = 0;
 static u_int16_t			cpu_count = 1;
 
+pid_t			mypid = -1;
 int			server_port = 0;
+u_int8_t		worker_count = 0;
 char			*server_ip = NULL;
 char			*chroot_path = NULL;
 char			*runas_user = NULL;
-u_int8_t		worker_count = 0;
-pid_t			mypid = -1;
+char			*kore_pidfile = KORE_PIDFILE_DEFAULT;
 
 static void	kore_signal(int);
 static void	kore_worker_wait(int);
 static void	kore_worker_init(void);
+static void	kore_write_mypid(void);
 static int	kore_socket_nonblock(int);
 static int	kore_server_sslstart(void);
 static void	kore_event(int, int, void *);
@@ -88,8 +90,11 @@ main(int argc, char *argv[])
 	struct kore_worker	*kw, *next;
 
 	mypid = getpid();
+
 	if (argc != 2)
 		fatal("Usage: kore [config file]");
+	if (getuid() != 0)
+		fatal("kore must be started as root");
 
 	kore_parse_config(argv[1]);
 	if (!kore_module_loaded())
@@ -114,10 +119,7 @@ main(int argc, char *argv[])
 		fatal("cannot daemon(): %s", errno_s);
 
 	mypid = getpid();
-	if (chroot(chroot_path) == -1)
-		fatal("chroot(%s): %s", chroot_path, errno_s);
-	if (chdir("/") == -1)
-		fatal("chdir(/): %s", errno_s);
+	kore_write_mypid();
 
 	kore_worker_init();
 
@@ -125,8 +127,6 @@ main(int argc, char *argv[])
 	signal(SIGQUIT, kore_signal);
 	signal(SIGHUP, kore_signal);
 
-	printf("kore has been started\n");
-
 	for (;;) {
 		if (sig_recv != 0) {
 			if (sig_recv == SIGHUP) {
@@ -157,6 +157,7 @@ main(int argc, char *argv[])
 		kore_worker_wait(1);
 
 	kore_debug("server shutting down");
+	unlink(kore_pidfile);
 	close(server.fd);
 
 	return (0);
@@ -683,6 +684,19 @@ kore_event(int fd, int flags, void *udata)
 	}
 }
 
+static void
+kore_write_mypid(void)
+{
+	FILE		*fp;
+
+	if ((fp = fopen(kore_pidfile, "w+")) == NULL) {
+		kore_debug("kore_write_mypid(): fopen() %s", errno_s);
+	} else {
+		fprintf(fp, "%d\n", mypid);
+		fclose(fp);
+	}
+}
+
 static void
 kore_signal(int sig)
 {