zlib/inflate.o zlib/inftrees.o zlib/infutil.o zlib/trees.o \
zlib/zutil.o zlib/adler32.o
OBJS1=rsync.o exclude.o util.o md4.o main.o checksum.o match.o syscall.o log.o
-OBJS2=options.o flist.o io.o compat.o hlink.o token.o uidlist.o socket.o
+OBJS2=options.o flist.o io.o compat.o hlink.o token.o uidlist.o socket.o fileio.o
DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o
OBJS=$(OBJS1) $(OBJS2) $(DAEMON_OBJ) $(LIBOBJ) $(ZLIBOBJ)
if (am_server) {
remote_version = read_int(f_in);
write_int(f_out,PROTOCOL_VERSION);
- write_flush(f_out);
} else {
write_int(f_out,PROTOCOL_VERSION);
- write_flush(f_out);
remote_version = read_int(f_in);
}
}
--- /dev/null
+/*
+ Copyright (C) Andrew Tridgell 1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+ File IO utilities used in rsync
+ */
+#include "rsync.h"
+
+static char last_byte;
+static int last_sparse;
+extern int sparse_files;
+
+int sparse_end(int f)
+{
+ if (last_sparse) {
+ do_lseek(f,-1,SEEK_CUR);
+ return (write(f,&last_byte,1) == 1 ? 0 : -1);
+ }
+ last_sparse = 0;
+ return 0;
+}
+
+
+static int write_sparse(int f,char *buf,int len)
+{
+ int l1=0,l2=0;
+ int ret;
+
+ 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];
+
+ if (l1 == len || l2 > 0)
+ last_sparse=1;
+
+ if (l1 > 0)
+ do_lseek(f,l1,SEEK_CUR);
+
+ 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 (l2 > 0)
+ do_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;
+}
+
+
+
+struct map_struct *map_file(int fd,OFF_T len)
+{
+ struct map_struct *ret;
+ ret = (struct map_struct *)malloc(sizeof(*ret));
+ if (!ret) out_of_memory("map_file");
+
+ ret->map = NULL;
+ ret->fd = fd;
+ ret->size = len;
+ ret->p = NULL;
+ ret->p_size = 0;
+ ret->p_offset = 0;
+ ret->p_len = 0;
+
+#ifdef USE_MMAP
+ len = MIN(len, MAX_MAP_SIZE);
+ ret->map = (char *)do_mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
+ if (ret->map == (char *)-1) {
+ ret->map = NULL;
+ } else {
+ ret->p_len = len;
+ }
+#endif
+ return ret;
+}
+
+
+char *map_ptr(struct map_struct *map,OFF_T offset,int len)
+{
+ int nread;
+
+ if (len == 0)
+ return NULL;
+
+ if (len > (map->size-offset))
+ len = map->size-offset;
+
+#ifdef USE_MMAP
+ if (map->map) {
+ if (offset >= map->p_offset &&
+ offset+len <= map->p_offset+map->p_len) {
+ return (map->map + (offset - map->p_offset));
+ }
+ if (munmap(map->map, map->p_len) != 0) {
+ rprintf(FERROR,"munmap failed : %s\n", strerror(errno));
+ exit_cleanup(1);
+ }
+
+ /* align the mmap region on a nice boundary back a bit from
+ where it is asked for to allow for some seeking */
+ if (offset > 2*CHUNK_SIZE) {
+ map->p_offset = offset - 2*CHUNK_SIZE;
+ map->p_offset &= ~((OFF_T)(CHUNK_SIZE-1));
+ } else {
+ map->p_offset = 0;
+ }
+
+ /* map up to MAX_MAP_SIZE */
+ map->p_len = MAX(len, MAX_MAP_SIZE);
+ map->p_len = MIN(map->p_len, map->size - map->p_offset);
+
+ map->map = (char *)do_mmap(NULL,map->p_len,PROT_READ,
+ MAP_SHARED,map->fd,map->p_offset);
+
+ if (map->map == (char *)-1) {
+ map->map = NULL;
+ map->p_len = 0;
+ map->p_offset = 0;
+ } else {
+ return (map->map + (offset - map->p_offset));
+ }
+ }
+#endif
+
+ if (offset >= map->p_offset &&
+ offset+len <= map->p_offset+map->p_len) {
+ return (map->p + (offset - map->p_offset));
+ }
+
+ len = MAX(len,CHUNK_SIZE);
+ if (len > (map->size-offset))
+ len = map->size-offset;
+
+ if (len > map->p_size) {
+ if (map->p) free(map->p);
+ map->p = (char *)malloc(len);
+ if (!map->p) out_of_memory("map_ptr");
+ map->p_size = len;
+ }
+
+ map->p_offset = offset;
+ map->p_len = len;
+
+ if (do_lseek(map->fd,offset,SEEK_SET) != offset) {
+ rprintf(FERROR,"lseek failed in map_ptr\n");
+ exit_cleanup(1);
+ }
+
+ if ((nread=read(map->fd,map->p,len)) != len) {
+ if (nread < 0) nread = 0;
+ /* the best we can do is zero the buffer - the file
+ has changed mid transfer! */
+ memset(map->p+nread, 0, len - nread);
+ }
+
+ return map->p;
+}
+
+
+void unmap_file(struct map_struct *map)
+{
+#ifdef USE_MMAP
+ if (map->map) {
+ munmap(map->map,map->p_len);
+ map->map = NULL;
+ }
+#endif
+ if (map->p) {
+ free(map->p);
+ map->p = NULL;
+ }
+ memset(map, 0, sizeof(*map));
+ free(map);
+}
+
if (f != -1) {
io_end_buffering(f);
- write_flush(f);
}
if (verbose > 2)
static time_t last_io;
extern int verbose;
-extern int sparse_files;
extern int io_timeout;
int64 write_total(void)
static int buffer_f_in = -1;
-void setup_nonblocking(int f_in,int f_out)
+void setup_readbuffer(int f_in)
{
- set_blocking(f_out,0);
buffer_f_in = f_in;
}
static int read_buffer_len;
static int read_buffer_size;
-
-/* continue trying to read len bytes - don't return until len
- has been read */
-static void read_loop(int fd, char *buf, int len)
+/* read from a socket with IO timeout. return the number of
+ bytes read. If no bytes can be read then exit, never return
+ a number <= 0 */
+static int read_timeout(int fd, char *buf, int len)
{
- while (len) {
- int n = read(fd, buf, len);
+ int n, ret=0;
+
+ while (ret == 0) {
+ fd_set fds;
+ struct timeval tv;
+
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+ tv.tv_sec = io_timeout;
+ tv.tv_usec = 0;
+
+ if (select(fd+1, &fds, NULL, NULL,
+ io_timeout?&tv:NULL) != 1) {
+ check_timeout();
+ continue;
+ }
+
+ n = read(fd, buf, len);
+
if (n > 0) {
buf += n;
len -= n;
+ ret += n;
+ if (io_timeout)
+ last_io = time(NULL);
+ continue;
}
+
+ if (n == -1 && errno == EINTR) {
+ continue;
+ }
+
if (n == 0) {
- rprintf(FERROR,"EOF in read_loop\n");
+ rprintf(FERROR,"EOF in read_timeout\n");
exit_cleanup(1);
}
- if (n == -1) {
- fd_set fds;
- struct timeval tv;
- if (errno != EAGAIN && errno != EWOULDBLOCK) {
- rprintf(FERROR,"io error: %s\n",
- strerror(errno));
- exit_cleanup(1);
- }
+ rprintf(FERROR,"read error: %s\n", strerror(errno));
+ exit_cleanup(1);
+ }
- FD_ZERO(&fds);
- FD_SET(fd, &fds);
- tv.tv_sec = io_timeout;
- tv.tv_usec = 0;
+ return ret;
+}
- if (select(fd+1, &fds, NULL, NULL,
- io_timeout?&tv:NULL) != 1) {
- check_timeout();
- }
- }
+/* continue trying to read len bytes - don't return until len
+ has been read */
+static void read_loop(int fd, char *buf, int len)
+{
+ while (len) {
+ int n = read_timeout(fd, buf, len);
+
+ buf += n;
+ len -= n;
}
}
+/* read from the file descriptor handing multiplexing -
+ return number of bytes read
+ never return <= 0 */
static int read_unbuffered(int fd, char *buf, int len)
{
static int remaining;
char line[1024];
if (!io_multiplexing_in || fd != multiplex_in_fd)
- return read(fd, buf, len);
+ return read_timeout(fd, buf, len);
while (ret == 0) {
if (remaining) {
}
+
/* This function was added to overcome a deadlock problem when using
* ssh. It looks like we can't allow our receive queue to get full or
* ssh will clag up. Uggh. */
static void read_check(int f)
{
- int n;
+ int n = 8192;
if (f == -1) return;
read_buffer_p = read_buffer;
}
- if ((n=num_waiting(f)) <= 0)
- return;
-
- /* things could deteriorate if we read in really small chunks */
- if (n < 10) n = 1024;
-
if (n > MAX_READ_BUFFER/4)
n = MAX_READ_BUFFER/4;
}
n = read_unbuffered(f,read_buffer+read_buffer_len,n);
- if (n > 0) {
- read_buffer_len += n;
- }
+ read_buffer_len += n;
}
-static int readfd(int fd,char *buffer,int N)
+
+/* do a buffered read from fd. don't return until all N bytes
+ have been read. If all N can't be read then exit with an error */
+static void readfd(int fd,char *buffer,int N)
{
int ret;
int total=0;
- struct timeval tv;
- if (read_buffer_len < N)
+ if (read_buffer_len < N && N < 1024) {
read_check(buffer_f_in);
+ }
while (total < N) {
if (read_buffer_len > 0 && buffer_f_in == fd) {
io_flush();
- while ((ret = read_unbuffered(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,
- io_timeout?&tv:NULL) != 1) {
- check_timeout();
- }
- }
-
- if (ret <= 0)
- return total;
+ ret = read_unbuffered(fd,buffer + total,N-total);
total += ret;
}
-
- if (io_timeout)
- last_io = time(NULL);
- return total;
}
int32 read_int(int f)
{
- int ret;
- char b[4];
- if ((ret=readfd(f,b,4)) != 4) {
- if (verbose > 1)
- rprintf(FERROR,"(%d) read_int: Error reading %d bytes : %s\n",
- getpid(),4,ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
- total_read += 4;
- return IVAL(b,0);
+ char b[4];
+ readfd(f,b,4);
+ total_read += 4;
+ return IVAL(b,0);
}
int64 read_longint(int f)
exit_cleanup(1);
#else
if (remote_version >= 16) {
- if ((ret=readfd(f,b,8)) != 8) {
- if (verbose > 1)
- rprintf(FERROR,"(%d) read_longint: Error reading %d bytes : %s\n",
- getpid(),8,ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
+ readfd(f,b,8);
total_read += 8;
ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
}
void read_buf(int f,char *buf,int len)
{
- int ret;
- if ((ret=readfd(f,buf,len)) != len) {
- if (verbose > 1)
- rprintf(FERROR,"(%d) read_buf: Error reading %d bytes : %s\n",
- getpid(),len,ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
- total_read += len;
+ readfd(f,buf,len);
+ total_read += len;
}
void read_sbuf(int f,char *buf,int len)
unsigned char read_byte(int f)
{
- unsigned char c;
- read_buf(f,(char *)&c,1);
- return c;
+ unsigned char c;
+ read_buf(f,(char *)&c,1);
+ return c;
}
-static char last_byte;
-static int last_sparse;
-int sparse_end(int f)
-{
- if (last_sparse) {
- do_lseek(f,-1,SEEK_CUR);
- return (write(f,&last_byte,1) == 1 ? 0 : -1);
- }
- last_sparse = 0;
- return 0;
-}
-
-
-static int write_sparse(int f,char *buf,int len)
-{
- int l1=0,l2=0;
- int ret;
-
- 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];
-
- if (l1 == len || l2 > 0)
- last_sparse=1;
-
- if (l1 > 0)
- do_lseek(f,l1,SEEK_CUR);
-
- 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 (l2 > 0)
- do_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;
-}
-
-
-static int writefd_unbuffered(int fd,char *buf,int len)
+/* write len bytes to fd, possibly reading from buffer_f_in if set
+ in order to unclog the pipe. don't return until all len
+ bytes have been written */
+static void writefd_unbuffered(int fd,char *buf,int len)
{
int total = 0;
fd_set w_fds, r_fds;
- int fd_count, count, got_select=0;
+ int fd_count, count;
struct timeval tv;
+ int reading;
- while (total < len) {
- int ret = write(fd,buf+total,len-total);
-
- if (ret == 0) return total;
-
- if (ret == -1 && !(errno == EWOULDBLOCK || errno == EAGAIN))
- return -1;
-
- if (ret == -1 && got_select) {
- /* hmmm, we got a write select on the fd and
- then failed to write. Why doesn't that
- mean that the fd is dead? It doesn't on
- some systems it seems (eg. IRIX) */
- u_sleep(1000);
- }
-
- got_select = 0;
+ reading = (buffer_f_in != -1 && read_buffer_len < MAX_READ_BUFFER);
-
- if (ret != -1) {
- total += ret;
- continue;
- }
-
- if (read_buffer_len < MAX_READ_BUFFER && buffer_f_in != -1)
- read_check(buffer_f_in);
-
- fd_count = fd+1;
+ while (total < len) {
FD_ZERO(&w_fds);
FD_ZERO(&r_fds);
FD_SET(fd,&w_fds);
- if (buffer_f_in != -1) {
+ fd_count = fd+1;
+
+ if (reading) {
FD_SET(buffer_f_in,&r_fds);
if (buffer_f_in > fd)
fd_count = buffer_f_in+1;
}
- tv.tv_sec = BLOCKING_TIMEOUT;
+ tv.tv_sec = io_timeout;
tv.tv_usec = 0;
- count = select(fd_count,buffer_f_in == -1? NULL: &r_fds,
- &w_fds,NULL,&tv);
-
- if (count == -1 && errno != EINTR) {
- if (verbose > 1)
- rprintf(FERROR,"select error: %s\n", strerror(errno));
- exit_cleanup(1);
- }
-
- if (count == 0) {
+
+ count = select(fd_count,
+ reading?&r_fds:NULL,
+ &w_fds,NULL,
+ io_timeout?&tv:NULL);
+
+ if (count <= 0) {
check_timeout();
continue;
}
-
+
if (FD_ISSET(fd, &w_fds)) {
- got_select = 1;
+ int ret = write(fd,buf+total,len-total);
+
+ if (ret == -1 && errno == EINTR) {
+ continue;
+ }
+
+ if (ret <= 0) {
+ rprintf(FERROR,"erroring writing %d bytes - exiting\n", len);
+ exit_cleanup(1);
+ }
+
+ total += ret;
+ if (io_timeout)
+ last_io = time(NULL);
+ continue;
}
- }
- if (io_timeout)
- last_io = time(NULL);
-
- return total;
+ if (reading && FD_ISSET(buffer_f_in, &r_fds)) {
+ read_check(buffer_f_in);
+ }
+ }
}
if (io_multiplexing_out) {
SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count);
- if (writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4) !=
- io_buffer_count+4) {
- rprintf(FERROR,"write failed\n");
- exit_cleanup(1);
- }
+ writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4);
} else {
- if (writefd_unbuffered(fd, io_buffer, io_buffer_count) !=
- io_buffer_count) {
- rprintf(FERROR,"write failed\n");
- exit_cleanup(1);
- }
+ writefd_unbuffered(fd, io_buffer, io_buffer_count);
}
io_buffer_count = 0;
}
}
}
-static int writefd(int fd,char *buf,int len1)
+static void writefd(int fd,char *buf,int len)
{
- int len = len1;
-
- if (!io_buffer) return writefd_unbuffered(fd, buf, len);
+ if (!io_buffer) {
+ writefd_unbuffered(fd, buf, len);
+ return;
+ }
while (len) {
int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count);
if (io_buffer_count == IO_BUFFER_SIZE) io_flush();
}
-
- return len1;
}
void write_int(int f,int32 x)
{
- int ret;
char b[4];
SIVAL(b,0,x);
- if ((ret=writefd(f,b,4)) != 4) {
- rprintf(FERROR,"write_int failed : %s\n",
- ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
+ writefd(f,b,4);
total_written += 4;
}
{
extern int remote_version;
char b[8];
- int ret;
if (remote_version < 16 || x <= 0x7FFFFFFF) {
write_int(f, (int)x);
SIVAL(b,0,(x&0xFFFFFFFF));
SIVAL(b,4,((x>>32)&0xFFFFFFFF));
- if ((ret=writefd(f,b,8)) != 8) {
- rprintf(FERROR,"write_longint failed : %s\n",
- ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
+ writefd(f,b,8);
total_written += 8;
}
void write_buf(int f,char *buf,int len)
{
- int ret;
- if ((ret=writefd(f,buf,len)) != len) {
- rprintf(FERROR,"write_buf failed : %s\n",
- ret==-1?strerror(errno):"EOF");
- exit_cleanup(1);
- }
+ writefd(f,buf,len);
total_written += len;
}
write_buf(f,(char *)&c,1);
}
-void write_flush(int f)
-{
-}
-
-
int read_line(int f, char *buf, int maxlen)
{
while (maxlen) {
write_longint(f,read_total());
write_longint(f,write_total());
write_longint(f,total_size);
- write_flush(f);
return;
}
send_token(f,i,buf,last_match,n,i<0?0:s->sums[i].len);
data_transfer += n;
- if (n > 0)
- write_flush(f);
-
if (i >= 0)
n += s->sums[i].len;
write_int(f_out,s->sums[i].sum1);
write_buf(f_out,s->sums[i].sum2,csum_length);
}
- write_flush(f_out);
}
write_int(f_out,i);
send_sums(s,f_out);
- write_flush(f_out);
close(fd);
if (buf) unmap_file(buf);
if (verbose > 2)
rprintf(FINFO,"recv_files phase=%d\n",phase);
write_int(f_gen,-1);
- write_flush(f_gen);
continue;
}
break;
if (verbose > 2)
rprintf(FINFO,"send_files starting\n");
- setup_nonblocking(f_in,f_out);
+ setup_readbuffer(f_in);
while (1) {
i = read_int(f_in);
phase++;
csum_length = SUM_LENGTH;
write_int(f_out,-1);
- write_flush(f_out);
if (verbose > 2)
rprintf(FINFO,"send_files phase=%d\n",phase);
continue;
printf("%s\n",fname+offset);
match_sums(f_out,s,buf,st.st_size);
- write_flush(f_out);
if (buf) unmap_file(buf);
close(fd);
match_report();
write_int(f_out,-1);
- write_flush(f_out);
}
rprintf(FINFO,"generate_files phase=%d\n",phase);
write_int(f,-1);
- write_flush(f);
/* we expect to just sit around now, so don't exit on a timeout. If we
really get a timeout then the other process should exit */
rprintf(FINFO,"generate_files phase=%d\n",phase);
write_int(f,-1);
- write_flush(f);
}
#define MAX_ARGS 1000
-#define BLOCKING_TIMEOUT 10
-
#define MPLEX_BASE 7
#define FERROR 1
#define FINFO 2
}
-struct map_struct *map_file(int fd,OFF_T len)
-{
- struct map_struct *ret;
- ret = (struct map_struct *)malloc(sizeof(*ret));
- if (!ret) out_of_memory("map_file");
-
- ret->map = NULL;
- ret->fd = fd;
- ret->size = len;
- ret->p = NULL;
- ret->p_size = 0;
- ret->p_offset = 0;
- ret->p_len = 0;
-
-#ifdef USE_MMAP
- len = MIN(len, MAX_MAP_SIZE);
- ret->map = (char *)do_mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
- if (ret->map == (char *)-1) {
- ret->map = NULL;
- } else {
- ret->p_len = len;
- }
-#endif
- return ret;
-}
-
-
-char *map_ptr(struct map_struct *map,OFF_T offset,int len)
-{
- int nread;
-
- if (len == 0)
- return NULL;
-
- if (len > (map->size-offset))
- len = map->size-offset;
-
-#ifdef USE_MMAP
- if (map->map) {
- if (offset >= map->p_offset &&
- offset+len <= map->p_offset+map->p_len) {
- return (map->map + (offset - map->p_offset));
- }
- if (munmap(map->map, map->p_len) != 0) {
- rprintf(FERROR,"munmap failed : %s\n", strerror(errno));
- exit_cleanup(1);
- }
-
- /* align the mmap region on a nice boundary back a bit from
- where it is asked for to allow for some seeking */
- if (offset > 2*CHUNK_SIZE) {
- map->p_offset = offset - 2*CHUNK_SIZE;
- map->p_offset &= ~((OFF_T)(CHUNK_SIZE-1));
- } else {
- map->p_offset = 0;
- }
-
- /* map up to MAX_MAP_SIZE */
- map->p_len = MAX(len, MAX_MAP_SIZE);
- map->p_len = MIN(map->p_len, map->size - map->p_offset);
-
- map->map = (char *)do_mmap(NULL,map->p_len,PROT_READ,
- MAP_SHARED,map->fd,map->p_offset);
-
- if (map->map == (char *)-1) {
- map->map = NULL;
- map->p_len = 0;
- map->p_offset = 0;
- } else {
- return (map->map + (offset - map->p_offset));
- }
- }
-#endif
-
- if (offset >= map->p_offset &&
- offset+len <= map->p_offset+map->p_len) {
- return (map->p + (offset - map->p_offset));
- }
-
- len = MAX(len,CHUNK_SIZE);
- if (len > (map->size-offset))
- len = map->size-offset;
-
- if (len > map->p_size) {
- if (map->p) free(map->p);
- map->p = (char *)malloc(len);
- if (!map->p) out_of_memory("map_ptr");
- map->p_size = len;
- }
-
- map->p_offset = offset;
- map->p_len = len;
-
- if (do_lseek(map->fd,offset,SEEK_SET) != offset) {
- rprintf(FERROR,"lseek failed in map_ptr\n");
- exit_cleanup(1);
- }
-
- if ((nread=read(map->fd,map->p,len)) != len) {
- if (nread < 0) nread = 0;
- /* the best we can do is zero the buffer - the file
- has changed mid transfer! */
- memset(map->p+nread, 0, len - nread);
- }
-
- return map->p;
-}
-
-
-void unmap_file(struct map_struct *map)
-{
-#ifdef USE_MMAP
- if (map->map) {
- munmap(map->map,map->p_len);
- map->map = NULL;
- }
-#endif
- if (map->p) {
- free(map->p);
- map->p = NULL;
- }
- memset(map, 0, sizeof(*map));
- free(map);
-}
-
/* this is taken from CVS */
int piped_child(char **command,int *f_in,int *f_out)
}
-
-/****************************************************************************
-Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
-else
-if SYSV use O_NDELAY
-if BSD use FNDELAY
-****************************************************************************/
-int set_blocking(int fd, int set)
-{
- int val;
-#ifdef O_NONBLOCK
-#define FLAG_TO_SET O_NONBLOCK
-#else
-#ifdef SYSV
-#define FLAG_TO_SET O_NDELAY
-#else /* BSD */
-#define FLAG_TO_SET FNDELAY
-#endif
-#endif
-
- if((val = fcntl(fd, F_GETFL, 0)) == -1)
- return -1;
- if(set) /* Turn blocking on - ie. clear nonblock flag */
- val &= ~FLAG_TO_SET;
- else
- val |= FLAG_TO_SET;
- return fcntl( fd, F_SETFL, val);
-#undef FLAG_TO_SET
-}
-
/****************************************************************************
create any necessary directories in fname. Unfortunately we don't know
what perms to give the directory when this is called so we need to rely