X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=sysklogd%2Flogread.c;h=932bbecbba830200fe2e138d09db97519aa8442b;hb=11a802a0fa04627110809d908c588aa2c471d5aa;hp=597e285a52c132e3528eea43bfbb0de9865f32db;hpb=5f1b149d541ebba7cab841cb647f113248f9fb8f;p=oweals%2Fbusybox.git

diff --git a/sysklogd/logread.c b/sysklogd/logread.c
index 597e285a5..932bbecbb 100644
--- a/sysklogd/logread.c
+++ b/sysklogd/logread.c
@@ -16,20 +16,34 @@
 
 #define DEBUG 0
 
+/* our shared key (syslogd.c and logread.c must be in sync) */
 enum { KEY_ID = 0x414e4547 }; /* "GENA" */
 
-static struct shbuf_ds {
+struct shbuf_ds {
 	int32_t size;           // size of data - 1
 	int32_t tail;           // end of message list
 	char data[1];           // messages
-} *shbuf;
-
-// Semaphore operation structures
-static struct sembuf SMrup[1] = {{0, -1, IPC_NOWAIT | SEM_UNDO}}; // set SMrup
-static struct sembuf SMrdn[2] = {{1, 0}, {0, +1, SEM_UNDO}}; // set SMrdn
-
-
-static void error_exit(const char *str) ATTRIBUTE_NORETURN;
+};
+
+static const struct sembuf init_sem[3] = {
+	{0, -1, IPC_NOWAIT | SEM_UNDO},
+	{1, 0}, {0, +1, SEM_UNDO}
+};
+
+struct globals {
+	struct sembuf SMrup[1]; // {0, -1, IPC_NOWAIT | SEM_UNDO},
+	struct sembuf SMrdn[2]; // {1, 0}, {0, +1, SEM_UNDO}
+	struct shbuf_ds *shbuf;
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define SMrup (G.SMrup)
+#define SMrdn (G.SMrdn)
+#define shbuf (G.shbuf)
+#define INIT_G() do { \
+	memcpy(SMrup, init_sem, sizeof(init_sem)); \
+} while (0)
+
+static void error_exit(const char *str) NORETURN;
 static void error_exit(const char *str)
 {
 	//release all acquired resources
@@ -46,20 +60,22 @@ static void sem_up(int semid)
 		error_exit("semop[SMrup]");
 }
 
-static void interrupted(int sig ATTRIBUTE_UNUSED)
+static void interrupted(int sig UNUSED_PARAM)
 {
 	signal(SIGINT, SIG_IGN);
 	shmdt(shbuf);
-	exit(0);
+	exit(EXIT_SUCCESS);
 }
 
-int logread_main(int argc, char **argv);
-int logread_main(int argc, char **argv)
+int logread_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int logread_main(int argc UNUSED_PARAM, char **argv)
 {
-	int cur;
+	unsigned cur;
 	int log_semid; /* ipc semaphore id */
 	int log_shmid; /* ipc shared memory id */
-	smallint follow = getopt32(argc, argv, "f");
+	smallint follow = getopt32(argv, "f");
+
+	INIT_G();
 
 	log_shmid = shmget(KEY_ID, 0, 0);
 	if (log_shmid == -1)
@@ -119,7 +135,7 @@ int logread_main(int argc, char **argv)
 		} else { /* logread -f */
 			if (cur == shbuf_tail) {
 				sem_up(log_semid);
-				fflush(stdout);
+				fflush_all();
 				sleep(1); /* TODO: replace me with a sleep_on */
 				continue;
 			}