Revert "get rid of pid file"

This reverts commit e658e1694d.

dropbear/runopts.h

@@ -106,6 +106,7 @@ typedef struct svr_runopts {
 	int num_hostkey_files;
 
 	buffer * banner;
+	char * pidfile;
 
 } svr_runopts;
 

dropbear/svr-main.c

@@ -111,6 +111,7 @@ void main_noinetd() {
 	int maxsock = -1;
 	int listensocks[MAX_LISTEN_ADDR];
 	size_t listensockcount = 0;
+	FILE *pidfile = NULL;
 
 	int childpipes[MAX_UNAUTH_CLIENTS];
 	char * preauth_addrs[MAX_UNAUTH_CLIENTS];
@@ -161,6 +162,13 @@ void main_noinetd() {
 		dropbear_log(LOG_INFO, "Not backgrounding");
 	}
 
+	/* create a PID file so that we can be killed easily */
+	pidfile = fopen(svr_opts.pidfile, "w");
+	if (pidfile) {
+		fprintf(pidfile, "%d\n", getpid());
+		fclose(pidfile);
+	}
+
 	/* incoming connection select loop */
 	for(;;) {
 
@@ -182,6 +190,7 @@ void main_noinetd() {
 		val = select(maxsock+1, &fds, NULL, NULL, NULL);
 
 		if (exitflag) {
+			unlink(svr_opts.pidfile);
 			dropbear_exit("Terminated by signal");
 		}
 		

dropbear/svr-runopts.c

@@ -84,6 +84,8 @@ static void printhelp(const char * progname) {
 					"		Listen on specified tcp port (and optionally address),\n"
 					"		up to %d can be specified\n"
 					"		(default port is %s if none specified)\n"
+					"-P PidFile	Create pid file PidFile\n"
+					"		(default %s)\n"
 #ifdef INETD_MODE
 					"-i		Start for inetd\n"
 #endif
@@ -104,7 +106,7 @@ static void printhelp(const char * progname) {
 #ifdef DROPBEAR_ECDSA
 					ECDSA_PRIV_FILENAME,
 #endif
-					DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT,
+					DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE,
 					DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT);
 }
 
@@ -131,6 +133,7 @@ void svr_getopts(int argc, char ** argv) {
 	svr_opts.portcount = 0;
 	svr_opts.hostkey = NULL;
 	svr_opts.delay_hostkey = 0;
+	svr_opts.pidfile = DROPBEAR_PIDFILE;
 #ifdef ENABLE_SVR_LOCALTCPFWD
 	svr_opts.nolocaltcp = 0;
 #endif
@@ -220,6 +223,9 @@ void svr_getopts(int argc, char ** argv) {
 				case 'p':
 				  nextisport = 1;
 				  break;
+				case 'P':
+					next = &svr_opts.pidfile;
+					break;
 #ifdef DO_MOTD
 				/* motd is displayed by default, -m turns it off */
 				case 'm':