1 files changed, 23 insertions, 28 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 55664abf9..a180cc514 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -38,9 +38,11 @@
 #include "dhcpc.h"
 #include "options.h"
 #include "clientpacket.h"
+#include "clientsocket.h"
 #include "script.h"
 #include "socket.h"
 #include "common.h"
+#include "signalpipe.h"
 
 static int state;
 static unsigned long requested_ip; /* = 0 */
@@ -54,12 +56,6 @@ static int fd = -1;
 #define LISTEN_RAW 2
 static int listen_mode;
 
-#ifdef CONFIG_INSTALL_NO_USR
-#define DEFAULT_SCRIPT  "/share/udhcpc/default.script"
-#else
-#define DEFAULT_SCRIPT  "/usr/share/udhcpc/default.script"
-#endif
-
 struct client_config_t client_config = {
         /* Default options. */
         abort_if_no_lease: 0,
@@ -78,7 +74,7 @@ struct client_config_t client_config = {
 #ifndef IN_BUSYBOX
 static void __attribute__ ((noreturn)) show_usage(void)
 {
-        printf(
+        printf(
 "Usage: udhcpc [OPTIONS]\n\n"
 "  -c, --clientid=CLIENTID         Client identifier\n"
 "  -H, --hostname=HOSTNAME         Client hostname\n"
@@ -95,8 +91,8 @@ static void __attribute__ ((noreturn)) show_usage(void)
 "  -s, --script=file               Run file at dhcp events (default:\n"
 "                                  " DEFAULT_SCRIPT ")\n"
 "  -v, --version                   Display version\n"
-        );
-        exit(0);
+        );
+        exit(0);
 }
 #else
 #define show_usage bb_show_usage
@@ -177,7 +173,11 @@ static void client_background(void)
 }
 
 
+#ifdef COMBINED_BINARY
 int udhcpc_main(int argc, char *argv[])
+#else
+int main(int argc, char *argv[])
+#endif
 {
         unsigned char *temp, *message;
         unsigned long t1 = 0, t2 = 0, xid = 0;
@@ -258,18 +258,20 @@ int udhcpc_main(int argc, char *argv[])
                         client_config.script = optarg;
                         break;
                 case 'v':
-                        bb_error_msg("version %s\n", VERSION);
-                        return(0);
+                        printf("udhcpcd, version %s\n\n", VERSION);
+                        return 0;
                         break;
                 default:
                         show_usage();
                 }
         }
 
-        start_log("client");
+        /* Start the log, sanitize fd's, and write a pid file */
+        start_log_and_pid("udhcpc", client_config.pidfile);
+
         if (read_interface(client_config.interface, &client_config.ifindex, 
                            NULL, client_config.arp) < 0)
-                return(1);
+                return 1;
                 
         if (!client_config.clientid) {
                 client_config.clientid = xmalloc(6 + 3);
@@ -279,8 +281,8 @@ int udhcpc_main(int argc, char *argv[])
                 memcpy(client_config.clientid + 3, client_config.arp, 6);
         }
 
-        /* setup signal handlers */
-        udhcp_set_signal_pipe(SIGUSR2);
+        /* setup the signal pipe */
+        udhcp_sp_setup();       
         
         state = INIT_SELECTING;
         run_script(NULL, "deconfig");
@@ -290,7 +292,6 @@ int udhcpc_main(int argc, char *argv[])
 
                 tv.tv_sec = timeout - time(0);
                 tv.tv_usec = 0;
-                FD_ZERO(&rfds);
 
                 if (listen_mode != LISTEN_NONE && fd < 0) {
                         if (listen_mode == LISTEN_KERNEL)
@@ -299,15 +300,13 @@ int udhcpc_main(int argc, char *argv[])
                                 fd = raw_socket(client_config.ifindex);
                         if (fd < 0) {
                                 LOG(LOG_ERR, "FATAL: couldn't listen on socket, %m");
-                                return(0);
+                                return 0;
                         }
                 }
-                if (fd >= 0) FD_SET(fd, &rfds);
-                FD_SET(udhcp_signal_pipe[0], &rfds);
+                max_fd = udhcp_sp_fd_set(&rfds, fd);
 
                 if (tv.tv_sec > 0) {
                         DEBUG(LOG_INFO, "Waiting on select...");
-                        max_fd = udhcp_signal_pipe[0] > fd ? udhcp_signal_pipe[0] : fd;
                         retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
                 } else retval = 0; /* If we already timed out, fall through */
 
@@ -332,7 +331,7 @@ int udhcpc_main(int argc, char *argv[])
                                                 client_background();
                                         } else if (client_config.abort_if_no_lease) {
                                                 LOG(LOG_INFO, "No lease, failing.");
-                                                return(1);
+                                                return 1;
                                         }
                                         /* wait to try again */
                                         packet_num = 0;
@@ -474,7 +473,7 @@ int udhcpc_main(int argc, char *argv[])
                                         state = BOUND;
                                         change_mode(LISTEN_NONE);
                                         if (client_config.quit_after_lease) 
-                                                return(0);
+                                                return 0;
                                         if (!client_config.foreground)
                                                 client_background();
 
@@ -494,11 +493,7 @@ int udhcpc_main(int argc, char *argv[])
                                 break;
                         /* case BOUND, RELEASED: - ignore all packets */
                         }       
-                } else if (retval > 0 && FD_ISSET(udhcp_signal_pipe[0], &rfds)) {
-                        if (read(udhcp_signal_pipe[0], &sig, sizeof(sig)) < 0) {
-                                DEBUG(LOG_ERR, "Could not read signal: %m");
-                                continue; /* probably just EINTR */
-                        }
+                } else if (retval > 0 && (sig = udhcp_sp_read(&rfds))) {
                         switch (sig) {
                         case SIGUSR1: 
                                 perform_renew();
@@ -508,7 +503,7 @@ int udhcpc_main(int argc, char *argv[])
                                 break;
                         case SIGTERM:
                                 LOG(LOG_INFO, "Received SIGTERM");
-                                return(0);
+                                return 0;
                         }
                 } else if (retval == -1 && errno == EINTR) {
                         /* a signal was caught */