Added "const" to appropriate char pointers.

[rsync/rsync.git] / io.c

diff --git a/io.c b/io.c
index 5b87be6..0251176 100644 (file)
--- a/io.c
+++ b/io.c
@@ -46,7 +46,7 @@ extern int read_batch;
 extern int csum_length;
 extern int checksum_seed;
 extern int protocol_version;
-extern int remove_sent_files;
+extern int remove_source_files;
 extern int preserve_hard_links;
 extern char *filesfrom_host;
 extern struct stats stats;
@@ -204,7 +204,7 @@ void set_msg_fd_out(int fd)
 }
 
 /* Add a message to the pending MSG_* list. */
-static void msg_list_add(struct msg_list *lst, int code, char *buf, int len)
+static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len)
 {
        struct msg_list_item *m;
        int sz = len + 4 + sizeof m[0] - 1;
@@ -257,7 +257,7 @@ static void read_msg_fd(void)
                        exit_cleanup(RERR_STREAMIO);
                }
                read_loop(fd, buf, 4);
-               if (remove_sent_files)
+               if (remove_source_files)
                        decrement_active_files(IVAL(buf,0));
                flist_ndx_push(&redo_list, IVAL(buf,0));
                break;
@@ -275,7 +275,7 @@ static void read_msg_fd(void)
                        exit_cleanup(RERR_STREAMIO);
                }
                read_loop(fd, buf, len);
-               if (remove_sent_files) {
+               if (remove_source_files) {
                        decrement_active_files(IVAL(buf,0));
                        send_msg(MSG_SUCCESS, buf, len);
                }
@@ -311,7 +311,7 @@ static void read_msg_fd(void)
 }
 
 /* This is used by the generator to limit how many file transfers can
- * be active at once when --remove-sent-files is specified.  Without
+ * be active at once when --remove-source-files is specified.  Without
  * this, sender-side deletions were mostly happening at the end. */
 void increment_active_files(int ndx, int itemizing, enum logcode code)
 {
@@ -371,7 +371,7 @@ static int msg2genr_flush(int flush_it_all)
        return 1;
 }
 
-int send_msg(enum msgcode code, char *buf, int len)
+int send_msg(enum msgcode code, const char *buf, int len)
 {
        if (msg_fd_out < 0) {
                if (!defer_forwarding_messages)
@@ -633,13 +633,19 @@ int read_filesfrom_line(int fd, char *fname)
                if (cnt < 0 && (errno == EWOULDBLOCK
                  || errno == EINTR || errno == EAGAIN)) {
                        struct timeval tv;
-                       fd_set fds;
-                       FD_ZERO(&fds);
-                       FD_SET(fd, &fds);
+                       fd_set r_fds, e_fds;
+                       FD_ZERO(&r_fds);
+                       FD_SET(fd, &r_fds);
+                       FD_ZERO(&e_fds);
+                       FD_SET(fd, &e_fds);
                        tv.tv_sec = select_timeout;
                        tv.tv_usec = 0;
-                       if (!select(fd+1, &fds, NULL, NULL, &tv))
+                       if (!select(fd+1, &r_fds, NULL, &e_fds, &tv))
                                check_timeout();
+                       if (FD_ISSET(fd, &e_fds)) {
+                               rsyserr(FINFO, errno,
+                                       "select exception on fd %d", fd);
+                       }
                        continue;
                }
                if (cnt != 1)
@@ -888,12 +894,12 @@ int64 read_longint(int f)
        return num;
 }
 
-void read_buf(int f,char *buf,size_t len)
+void read_buf(int f, char *buf, size_t len)
 {
        readfd(f,buf,len);
 }
 
-void read_sbuf(int f,char *buf,size_t len)
+void read_sbuf(int f, char *buf, size_t len)
 {
        readfd(f, buf, len);
        buf[len] = '\0';
@@ -1033,10 +1039,10 @@ static void sleep_for_bwlimit(int bytes_written)
  *
  * This function underlies the multiplexing system.  The body of the
  * application never calls this function directly. */
-static void writefd_unbuffered(int fd,char *buf,size_t len)
+static void writefd_unbuffered(int fd, const char *buf, size_t len)
 {
        size_t n, total = 0;
-       fd_set w_fds, r_fds;
+       fd_set w_fds, r_fds, e_fds;
        int maxfd, count, cnt, using_r_fds;
        int defer_save = defer_forwarding_messages;
        struct timeval tv;
@@ -1045,12 +1051,14 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
 
        while (total < len) {
                FD_ZERO(&w_fds);
-               FD_SET(fd,&w_fds);
+               FD_SET(fd, &w_fds);
+               FD_ZERO(&e_fds);
+               FD_SET(fd, &e_fds);
                maxfd = fd;
 
                if (msg_fd_in >= 0) {
                        FD_ZERO(&r_fds);
-                       FD_SET(msg_fd_in,&r_fds);
+                       FD_SET(msg_fd_in, &r_fds);
                        if (msg_fd_in > maxfd)
                                maxfd = msg_fd_in;
                        using_r_fds = 1;
@@ -1062,7 +1070,7 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
 
                errno = 0;
                count = select(maxfd + 1, using_r_fds ? &r_fds : NULL,
-                              &w_fds, NULL, &tv);
+                              &w_fds, &e_fds, &tv);
 
                if (count <= 0) {
                        if (count < 0 && errno == EBADF)
@@ -1071,6 +1079,11 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
                        continue;
                }
 
+               if (FD_ISSET(fd, &e_fds)) {
+                       rsyserr(FINFO, errno,
+                               "select exception on fd %d", fd);
+               }
+
                if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds))
                        read_msg_fd();
 
@@ -1144,7 +1157,7 @@ static void msg2sndr_flush(void)
  * Write an message to a multiplexed stream. If this fails then rsync
  * exits.
  **/
-static void mplex_write(enum msgcode code, char *buf, size_t len)
+static void mplex_write(enum msgcode code, const char *buf, size_t len)
 {
        char buffer[1024];
        size_t n = len;
@@ -1184,7 +1197,7 @@ void io_flush(int flush_it_all)
        iobuf_out_cnt = 0;
 }
 
-static void writefd(int fd,char *buf,size_t len)
+static void writefd(int fd, const char *buf, size_t len)
 {
        if (fd == msg_fd_out) {
                rprintf(FERROR, "Internal error: wrong write used in receiver.\n");
@@ -1258,13 +1271,13 @@ void write_longint(int f, int64 x)
 #endif
 }
 
-void write_buf(int f,char *buf,size_t len)
+void write_buf(int f, const char *buf, size_t len)
 {
        writefd(f,buf,len);
 }
 
 /** Write a string to the connection */
-void write_sbuf(int f, char *buf)
+void write_sbuf(int f, const char *buf)
 {
        writefd(f, buf, strlen(buf));
 }
@@ -1274,7 +1287,7 @@ void write_byte(int f, uchar c)
        writefd(f, (char *)&c, 1);
 }
 
-void write_vstring(int f, char *str, int len)
+void write_vstring(int f, const char *str, int len)
 {
        uchar lenbuf[3], *lb = lenbuf;
 
@@ -1357,7 +1370,7 @@ void io_start_multiplex_in(void)
 }
 
 /** Write an message to the multiplexed data stream. */
-int io_multiplex_write(enum msgcode code, char *buf, size_t len)
+int io_multiplex_write(enum msgcode code, const char *buf, size_t len)
 {
        if (!io_multiplexing_out)
                return 0;