If there is no lchown(), don't try to set the user & group of a symlink.

[rsync/rsync.git] / io.c

diff --git a/io.c b/io.c
index ba96906..62880fb 100644 (file)
--- a/io.c
+++ b/io.c
@@ -46,6 +46,7 @@ extern int io_timeout;
 extern int am_server;
 extern int am_daemon;
 extern int am_sender;
+extern int am_generator;
 extern int eol_nulls;
 extern int checksum_seed;
 extern int protocol_version;
@@ -55,6 +56,7 @@ extern struct stats stats;
 const char phase_unknown[] = "unknown";
 int select_timeout = SELECT_TIMEOUT;
 int batch_fd = -1;
+int batch_gen_fd = -1;
 
 /**
  * The connection might be dropped at some point; perhaps because the
@@ -161,17 +163,17 @@ void io_set_sock_fds(int f_in, int f_out)
        sock_f_out = f_out;
 }
 
-/** Setup the fd used to receive MSG_* messages.  Only needed when
- * we're the generator because the sender and receiver both use the
- * multiplexed I/O setup. */
+/* Setup the fd used to receive MSG_* messages.  Only needed during the
+ * early stages of being a local sender (up through the sending of the
+ * file list) or when we're the generator (to fetch the messages from
+ * the receiver). */
 void set_msg_fd_in(int fd)
 {
        msg_fd_in = fd;
 }
 
-/** Setup the fd used to send our MSG_* messages.  Only needed when
- * we're the receiver because the generator and the sender both use
- * the multiplexed I/O setup. */
+/* Setup the fd used to send our MSG_* messages.  Only needed when
+ * we're the receiver (to send our messages to the generator). */
 void set_msg_fd_out(int fd)
 {
        msg_fd_out = fd;
@@ -204,8 +206,10 @@ void send_msg(enum msgcode code, char *buf, int len)
        msg_list_push(NORMAL_FLUSH);
 }
 
-/** Read a message from the MSG_* fd and dispatch it.  This is only
- * called by the generator. */
+/* Read a message from the MSG_* fd and handle it.  This is called either
+ * during the early stages of being a local sender (up through the sending
+ * of the file list) or when we're the generator (to fetch the messages
+ * from the receiver). */
 static void read_msg_fd(void)
 {
        char buf[2048];
@@ -225,14 +229,14 @@ static void read_msg_fd(void)
 
        switch (tag) {
        case MSG_DONE:
-               if (len != 0) {
+               if (len != 0 || !am_generator) {
                        rprintf(FERROR, "invalid message %d:%d\n", tag, len);
                        exit_cleanup(RERR_STREAMIO);
                }
                redo_list_add(-1);
                break;
        case MSG_REDO:
-               if (len != 4) {
+               if (len != 4 || !am_generator) {
                        rprintf(FERROR, "invalid message %d:%d\n", tag, len);
                        exit_cleanup(RERR_STREAMIO);
                }
@@ -352,8 +356,8 @@ static void whine_about_eof(int fd)
                exit_cleanup(0);
 
        rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed "
-               "(%.0f bytes read so far)\n",
-               (double)stats.total_read);
+               "(%.0f bytes received so far) [%s]\n",
+               (double)stats.total_read, who_am_i());
 
        exit_cleanup(RERR_STREAMIO);
 }
@@ -509,7 +513,7 @@ static int read_timeout(int fd, char *buf, size_t len)
 
                        /* Don't write errors on a dead socket. */
                        if (fd == sock_f_in)
-                               io_multiplexing_close();
+                               close_multiplexing_out();
                        rsyserr(FERROR, errno, "read error");
                        exit_cleanup(RERR_STREAMIO);
                }
@@ -743,13 +747,14 @@ int64 read_longint(int f)
        if ((int32)ret != (int32)0xffffffff)
                return ret;
 
-#ifdef NO_INT64
-       rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n");
-       exit_cleanup(RERR_UNSUPPORTED);
-#else
+#ifdef INT64_IS_OFF_T
+       if (sizeof (int64) < 8) {
+               rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+               exit_cleanup(RERR_UNSUPPORTED);
+       }
+#endif
        readfd(f,b,8);
        ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
-#endif
 
        return ret;
 }
@@ -855,6 +860,11 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
                        if (msg_fd_in > maxfd)
                                maxfd = msg_fd_in;
                }
+               if (fd != sock_f_out && iobuf_out_cnt && no_flush == 1) {
+                       FD_SET(sock_f_out, &w_fds);
+                       if (sock_f_out > maxfd)
+                               maxfd = sock_f_out;
+               }
 
                tv.tv_sec = select_timeout;
                tv.tv_usec = 0;
@@ -873,8 +883,14 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
                if (msg_fd_in >= 0 && FD_ISSET(msg_fd_in, &r_fds))
                        read_msg_fd();
 
-               if (!FD_ISSET(fd, &w_fds))
+               if (!FD_ISSET(fd, &w_fds)) {
+                       if (fd != sock_f_out && iobuf_out_cnt) {
+                               no_flush--;
+                               io_flush(NORMAL_FLUSH);
+                               no_flush++;
+                       }
                        continue;
+               }
 
                n = len - total;
                if (bwlimit && n > bwlimit_writemax)
@@ -893,10 +909,17 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
 
                        /* Don't try to write errors back across the stream. */
                        if (fd == sock_f_out)
-                               io_multiplexing_close();
+                               close_multiplexing_out();
                        rsyserr(FERROR, errno,
-                               "writefd_unbuffered failed to write %ld bytes: phase \"%s\"",
-                               (long)len, io_write_phase);
+                               "writefd_unbuffered failed to write %ld bytes: phase \"%s\" [%s]",
+                               (long)len, io_write_phase, who_am_i());
+                       /* If the other side is sending us error messages, try
+                        * to grab any messages they sent before they died. */
+                       while (fd == sock_f_out && io_multiplexing_in) {
+                               io_timeout = select_timeout = 30;
+                               readfd_unbuffered(sock_f_in, io_filesfrom_buf,
+                                                 sizeof io_filesfrom_buf);
+                       }
                        exit_cleanup(RERR_STREAMIO);
                }
 
@@ -1017,16 +1040,18 @@ void write_longint(int f, int64 x)
                return;
        }
 
-#ifdef NO_INT64
-       rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n");
-       exit_cleanup(RERR_UNSUPPORTED);
-#else
+#ifdef INT64_IS_OFF_T
+       if (sizeof (int64) < 8) {
+               rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+               exit_cleanup(RERR_UNSUPPORTED);
+       }
+#endif
+
        write_int(f, (int32)0xFFFFFFFF);
        SIVAL(b,0,(x&0xFFFFFFFF));
        SIVAL(b,4,((x>>32)&0xFFFFFFFF));
 
        writefd(f,b,8);
-#endif
 }
 
 void write_buf(int f,char *buf,size_t len)
@@ -1118,14 +1143,21 @@ int io_multiplex_write(enum msgcode code, char *buf, size_t len)
        return 1;
 }
 
+void close_multiplexing_in(void)
+{
+       io_multiplexing_in = 0;
+}
+
 /** Stop output multiplexing. */
-void io_multiplexing_close(void)
+void close_multiplexing_out(void)
 {
        io_multiplexing_out = 0;
 }
 
 void start_write_batch(int fd)
 {
+       write_stream_flags(batch_fd);
+
        /* Some communication has already taken place, but we don't
         * enable batch writing until here so that we can write a
         * canonical record of the communication even though the