X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/71c4617611ca07d7c249faa2dfd2cfc5cb32b836..3bee67337d0491f55654cf8e926592365e5a8502:/io.c

diff --git a/io.c b/io.c
index aae64b75..0021d956 100644
--- a/io.c
+++ b/io.c
@@ -29,6 +29,7 @@ static int64 total_read;
 
 extern int verbose;
 extern int sparse_files;
+extern int io_timeout;
 
 int64 write_total(void)
 {
@@ -95,39 +96,71 @@ static void read_check(int f)
   }
 }
 
+static time_t last_io;
+
+
+static void check_timeout(void)
+{
+	time_t t;
+	
+	if (!io_timeout) return;
+
+	if (!last_io) {
+		last_io = time(NULL);
+		return;
+	}
+
+	t = time(NULL);
+
+	if (last_io && io_timeout && (t-last_io)>io_timeout) {
+		fprintf(FERROR,"read timeout after %d second - exiting\n", 
+			(int)(t-last_io));
+		exit_cleanup(1);
+	}
+}
 
 static int readfd(int fd,char *buffer,int N)
 {
-  int  ret;
-  int total=0;  
-
-  if (read_buffer_len < N)
-	  read_check(buffer_f_in);
- 
-  while (total < N)
-    {
-      if (read_buffer_len > 0 && buffer_f_in == fd) {
-	ret = MIN(read_buffer_len,N-total);
-	memcpy(buffer+total,read_buffer_p,ret);
-	read_buffer_p += ret;
-	read_buffer_len -= ret;
-      } else {
-	while ((ret = read(fd,buffer + total,N - total)) == -1) {
-	  fd_set fds;
-
-	  if (errno != EAGAIN && errno != EWOULDBLOCK)
-	    return -1;
-	  FD_ZERO(&fds);
-	  FD_SET(fd, &fds);
-	  select(fd+1, &fds, NULL, NULL, NULL);
+	int  ret;
+	int total=0;  
+	struct timeval tv;
+	
+	if (read_buffer_len < N)
+		read_check(buffer_f_in);
+	
+	while (total < N) {
+		if (read_buffer_len > 0 && buffer_f_in == fd) {
+			ret = MIN(read_buffer_len,N-total);
+			memcpy(buffer+total,read_buffer_p,ret);
+			read_buffer_p += ret;
+			read_buffer_len -= ret;
+			total += ret;
+			continue;
+		} 
+
+		while ((ret = read(fd,buffer + total,N-total)) == -1) {
+			fd_set fds;
+
+			if (errno != EAGAIN && errno != EWOULDBLOCK)
+				return -1;
+			FD_ZERO(&fds);
+			FD_SET(fd, &fds);
+			tv.tv_sec = io_timeout;
+			tv.tv_usec = 0;
+
+			if (select(fd+1, &fds, NULL, NULL, &tv) != 1) {
+				check_timeout();
+			}
+		}
+
+		if (ret <= 0)
+			return total;
+		total += ret;
 	}
-      }
 
-      if (ret <= 0)
+	if (io_timeout)
+		last_io = time(NULL);
 	return total;
-      total += ret;
-    }
-  return total;
 }
 
 
@@ -154,7 +187,7 @@ int64 read_longint(int f)
 
 	if (ret != -1) return ret;
 
-#ifndef HAVE_LONGLONG
+#ifdef NO_INT64
 	fprintf(FERROR,"Integer overflow - attempted 64 bit offset\n");
 	exit_cleanup(1);
 #else
@@ -185,6 +218,12 @@ void read_buf(int f,char *buf,int len)
   total_read += len;
 }
 
+void read_sbuf(int f,char *buf,int len)
+{
+	read_buf(f,buf,len);
+	buf[len] = 0;
+}
+
 unsigned char read_byte(int f)
 {
   unsigned char c;
@@ -198,45 +237,66 @@ static int last_sparse;
 
 int sparse_end(int f)
 {
-  if (last_sparse) {
-    lseek(f,-1,SEEK_CUR);
-    return (write(f,&last_byte,1) == 1 ? 0 : -1);
-  }
-  last_sparse = 0;
-  return 0;
+	if (last_sparse) {
+		lseek(f,-1,SEEK_CUR);
+		return (write(f,&last_byte,1) == 1 ? 0 : -1);
+	}
+	last_sparse = 0;
+	return 0;
 }
 
-int write_sparse(int f,char *buf,int len)
+
+static int write_sparse(int f,char *buf,int len)
 {
-  int l1=0,l2=0;
-  int ret;
+	int l1=0,l2=0;
+	int ret;
 
-  if (!sparse_files) 
-    return write(f,buf,len);
+	for (l1=0;l1<len && buf[l1]==0;l1++) ;
+	for (l2=0;l2<(len-l1) && buf[len-(l2+1)]==0;l2++) ;
 
-  for (l1=0;l1<len && buf[l1]==0;l1++) ;
-  for (l2=0;l2<(len-l1) && buf[len-(l2+1)]==0;l2++) ;
+	last_byte = buf[len-1];
 
-  last_byte = buf[len-1];
+	if (l1 == len || l2 > 0)
+		last_sparse=1;
 
-  if (l1 == len || l2 > 0)
-    last_sparse=1;
+	if (l1 > 0)
+		lseek(f,l1,SEEK_CUR);  
 
-  if (l1 > 0)
-    lseek(f,l1,SEEK_CUR);  
+	if (l1 == len) 
+		return len;
 
-  if (l1 == len) 
-    return len;
+	if ((ret=write(f,buf+l1,len-(l1+l2))) != len-(l1+l2)) {
+		if (ret == -1 || ret == 0) return ret;
+		return (l1+ret);
+	}
 
-  if ((ret=write(f,buf+l1,len-(l1+l2))) != len-(l1+l2)) {
-    if (ret == -1 || ret == 0) return ret;
-    return (l1+ret);
-  }
+	if (l2 > 0)
+		lseek(f,l2,SEEK_CUR);
+	
+	return len;
+}
 
-  if (l2 > 0)
-    lseek(f,l2,SEEK_CUR);
 
-  return len;
+
+int write_file(int f,char *buf,int len)
+{
+	int ret = 0;
+
+	if (!sparse_files) 
+		return write(f,buf,len);
+
+	while (len>0) {
+		int len1 = MIN(len, SPARSE_WRITE_SIZE);
+		int r1 = write_sparse(f, buf, len1);
+		if (r1 <= 0) {
+			if (ret > 0) return ret;
+			return r1;
+		}
+		len -= r1;
+		buf += r1;
+		ret += r1;
+	}
+	return ret;
 }
 
 
@@ -295,7 +355,10 @@ static int writefd(int fd,char *buf,int len)
 	      exit_cleanup(1);
       }
 
-      if (count == 0) continue;
+      if (count == 0) {
+	      check_timeout();
+	      continue;
+      }
       
       if (FD_ISSET(fd, &w_fds)) {
 	      got_select = 1;
@@ -305,6 +368,9 @@ static int writefd(int fd,char *buf,int len)
     }
   }
 
+  if (io_timeout)
+	  last_io = time(NULL);
+
   return total;
 }