*/
#include "rsync.h"
-static int64 total_written;
-static int64 total_read;
+/* if no timeout is specified then use a 60 second select timeout */
+#define SELECT_TIMEOUT 60
static int io_multiplexing_out;
static int io_multiplexing_in;
static int eof_error=1;
extern int verbose;
extern int io_timeout;
-
-
-int64 write_total(void)
-{
- return total_written;
-}
-
-int64 read_total(void)
-{
- return total_read;
-}
+extern struct stats stats;
static int buffer_f_in = -1;
+static int io_error_fd = -1;
+static int in_read_check;
void setup_readbuffer(int f_in)
{
t = time(NULL);
- if (last_io && io_timeout && (t-last_io)>io_timeout) {
- rprintf(FERROR,"read timeout after %d second - exiting\n",
+ if (last_io && io_timeout && (t-last_io) >= io_timeout) {
+ rprintf(FERROR,"io timeout after %d second - exiting\n",
(int)(t-last_io));
- exit_cleanup(1);
+ exit_cleanup(RERR_TIMEOUT);
}
}
+/* setup the fd used to propogate errors */
+void io_set_error_fd(int fd)
+{
+ io_error_fd = fd;
+}
+
+/* read some data from the error fd and write it to FERROR */
+static void read_error_fd(void)
+{
+ char buf[200];
+ int n;
+ int fd = io_error_fd;
+ io_error_fd = -1;
+
+ n = read(fd, buf, sizeof(buf)-1);
+ if (n > 0) {
+ rwrite(FERROR, buf, n);
+ }
+
+ io_error_fd = fd;
+}
+
static char *read_buffer;
static char *read_buffer_p;
static int read_buffer_len;
static int read_buffer_size;
+static int no_flush;
+static int no_flush_read;
/* read from a socket with IO timeout. return the number of
bytes read. If no bytes can be read then exit, never return
{
int n, ret=0;
+ no_flush_read++;
io_flush();
+ no_flush_read--;
while (ret == 0) {
fd_set fds;
struct timeval tv;
+ int fd_count = fd+1;
FD_ZERO(&fds);
FD_SET(fd, &fds);
- tv.tv_sec = io_timeout;
+ if (io_error_fd != -1) {
+ FD_SET(io_error_fd, &fds);
+ if (io_error_fd > fd) fd_count = io_error_fd+1;
+ }
+
+ tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT;
tv.tv_usec = 0;
- if (select(fd+1, &fds, NULL, NULL,
- io_timeout?&tv:NULL) != 1) {
+ errno = 0;
+
+ if (select(fd_count, &fds, NULL, NULL, &tv) < 1) {
+ if (errno == EBADF) {
+ exit_cleanup(RERR_SOCKETIO);
+ }
check_timeout();
continue;
}
+ if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) {
+ read_error_fd();
+ }
+
+ if (!FD_ISSET(fd, &fds)) continue;
+
n = read(fd, buf, len);
if (n > 0) {
continue;
}
+
if (n == 0) {
if (eof_error) {
- rprintf(FERROR,"EOF in read_timeout\n");
+ rprintf(FERROR,"unexpected EOF in read_timeout\n");
}
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
+ /* this prevents us trying to write errors on a dead socket */
+ io_multiplexing_close();
+
rprintf(FERROR,"read error: %s\n", strerror(errno));
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
return ret;
if (tag != FERROR && tag != FINFO) {
rprintf(FERROR,"unexpected tag %d\n", tag);
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
if (remaining > sizeof(line)-1) {
rprintf(FERROR,"multiplexing overflow %d\n\n",
remaining);
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
read_loop(fd, line, remaining);
rprintf(tag,"%s", line);
remaining = 0;
+
+ if (in_read_check) break;
}
return ret;
static void read_check(int f)
{
int n = 8192;
+
+ in_read_check = 1;
if (f == -1) return;
n = read_unbuffered(f,read_buffer+read_buffer_len,n);
read_buffer_len += n;
+
+ in_read_check = 0;
}
int ret;
int total=0;
- if (read_buffer_len < N && N < 1024) {
+ if ((read_buffer_len < N) && (N < 1024)) {
read_check(buffer_f_in);
}
continue;
}
+ no_flush_read++;
io_flush();
+ no_flush_read--;
ret = read_unbuffered(fd,buffer + total,N-total);
total += ret;
}
+
+ stats.total_read += total;
}
int32 read_int(int f)
{
char b[4];
+ int32 ret;
+
readfd(f,b,4);
- total_read += 4;
- return IVAL(b,0);
+ ret = IVAL(b,0);
+ if (ret == (int32)0xffffffff) return -1;
+ return ret;
}
int64 read_longint(int f)
char b[8];
ret = read_int(f);
- if ((int32)ret != (int32)0xffffffff) return ret;
+ if ((int32)ret != (int32)0xffffffff) {
+ return ret;
+ }
#ifdef NO_INT64
rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n");
- exit_cleanup(1);
+ exit_cleanup(RERR_UNSUPPORTED);
#else
if (remote_version >= 16) {
readfd(f,b,8);
- total_read += 8;
ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
}
#endif
void read_buf(int f,char *buf,int len)
{
readfd(f,buf,len);
- total_read += len;
}
void read_sbuf(int f,char *buf,int len)
fd_set w_fds, r_fds;
int fd_count, count;
struct timeval tv;
- int reading;
+ int reading=0;
- reading = (buffer_f_in != -1 && read_buffer_len < MAX_READ_BUFFER);
+ no_flush++;
while (total < len) {
FD_ZERO(&w_fds);
FD_ZERO(&r_fds);
FD_SET(fd,&w_fds);
- fd_count = fd+1;
+ fd_count = fd;
+
+ if (!no_flush_read) {
+ reading = (buffer_f_in != -1);
+ }
if (reading) {
FD_SET(buffer_f_in,&r_fds);
- if (buffer_f_in > fd)
- fd_count = buffer_f_in+1;
+ if (buffer_f_in > fd_count)
+ fd_count = buffer_f_in;
+ }
+
+ if (io_error_fd != -1) {
+ FD_SET(io_error_fd,&r_fds);
+ if (io_error_fd > fd_count)
+ fd_count = io_error_fd;
}
- tv.tv_sec = io_timeout;
+ tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT;
tv.tv_usec = 0;
- count = select(fd_count,
- reading?&r_fds:NULL,
+ errno = 0;
+
+ count = select(fd_count+1,
+ (reading || io_error_fd != -1)?&r_fds:NULL,
&w_fds,NULL,
- io_timeout?&tv:NULL);
+ &tv);
if (count <= 0) {
+ if (errno == EBADF) {
+ exit_cleanup(RERR_SOCKETIO);
+ }
check_timeout();
continue;
}
+ if (reading && FD_ISSET(buffer_f_in, &r_fds)) {
+ read_check(buffer_f_in);
+ }
+
+ if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) {
+ read_error_fd();
+ }
+
if (FD_ISSET(fd, &w_fds)) {
- int ret = write(fd,buf+total,len-total);
+ int ret, n = len-total;
+
+ if (n > PIPE_BUF) n = PIPE_BUF;
+
+ ret = write(fd,buf+total,n?n:1);
if (ret == -1 && errno == EINTR) {
continue;
if (ret <= 0) {
rprintf(FERROR,"erroring writing %d bytes - exiting\n", len);
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
total += ret;
+
if (io_timeout)
last_io = time(NULL);
- continue;
- }
-
- if (reading && FD_ISSET(buffer_f_in, &r_fds)) {
- read_check(buffer_f_in);
}
}
+
+ no_flush--;
}
void io_flush(void)
{
int fd = multiplex_out_fd;
- if (!io_buffer_count) return;
+ if (!io_buffer_count || no_flush) return;
if (io_multiplexing_out) {
SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count);
static void writefd(int fd,char *buf,int len)
{
- if (!io_buffer) {
+ stats.total_written += len;
+
+ if (!io_buffer || fd != multiplex_out_fd) {
writefd_unbuffered(fd, buf, len);
return;
}
char b[4];
SIVAL(b,0,x);
writefd(f,b,4);
- total_written += 4;
}
void write_longint(int f, int64 x)
return;
}
- write_int(f, -1);
+ write_int(f, (int32)0xFFFFFFFF);
SIVAL(b,0,(x&0xFFFFFFFF));
SIVAL(b,4,((x>>32)&0xFFFFFFFF));
writefd(f,b,8);
- total_written += 8;
}
void write_buf(int f,char *buf,int len)
{
writefd(f,buf,len);
- total_written += len;
}
/* write a string to the connection */
-void write_sbuf(int f,char *buf)
+static void write_sbuf(int f,char *buf)
{
write_buf(f, buf, strlen(buf));
}
int len;
va_start(ap, format);
- len = vslprintf(buf, sizeof(buf)-1, format, ap);
+ len = vslprintf(buf, sizeof(buf), format, ap);
va_end(ap);
- if (len < 0) exit_cleanup(1);
+ if (len < 0) exit_cleanup(RERR_STREAMIO);
write_sbuf(fd, buf);
}
io_flush();
if (read_buffer_len) {
fprintf(stderr,"ERROR: data in read buffer at mplx start\n");
- exit_cleanup(1);
+ exit_cleanup(RERR_STREAMIO);
}
io_multiplexing_in = 1;
}
-/* write an message to the error stream */
+/* write an message to the multiplexed error stream */
int io_multiplex_write(int f, char *buf, int len)
{
if (!io_multiplexing_out) return 0;
SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len);
memcpy(io_buffer, buf, len);
+ stats.total_written += (len+4);
+
writefd_unbuffered(multiplex_out_fd, io_buffer-4, len+4);
return 1;
}
+/* write a message to the special error fd */
+int io_error_write(int f, char *buf, int len)
+{
+ if (f == -1) return 0;
+ writefd_unbuffered(f, buf, len);
+ return 1;
+}
+
+/* stop output multiplexing */
+void io_multiplexing_close(void)
+{
+ io_multiplexing_out = 0;
+}
+
void io_close_input(int fd)
{
buffer_f_in = -1;
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff