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OS/2 Shareware BBS: 35 Internet
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rsync221.zip
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receiver.c
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C/C++ Source or Header
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1999-03-04
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12KB
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485 lines
/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
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.
*/
#include "rsync.h"
extern int verbose;
extern int recurse;
extern int delete_mode;
extern int remote_version;
extern int csum_length;
extern struct stats stats;
extern int dry_run;
extern int am_server;
extern int relative_paths;
extern int preserve_hard_links;
extern int cvs_exclude;
extern int io_error;
extern char *tmpdir;
extern char *compare_dest;
extern int make_backups;
extern char *backup_suffix;
static struct delete_list {
dev_t dev;
INO_T inode;
} *delete_list;
static int dlist_len, dlist_alloc_len;
/* yuck! This function wouldn't have been necessary if I had the sorting
algorithm right. Unfortunately fixing the sorting algorithm would introduce
a backward incompatibility as file list indexes are sent over the link.
*/
static int delete_already_done(struct file_list *flist,int j)
{
int i;
STRUCT_STAT st;
if (link_stat(f_name(flist->files[j]), &st)) return 1;
for (i=0;i<dlist_len;i++) {
if (st.st_ino == delete_list[i].inode &&
st.st_dev == delete_list[i].dev)
return 1;
}
return 0;
}
static void add_delete_entry(struct file_struct *file)
{
if (dlist_len == dlist_alloc_len) {
dlist_alloc_len += 1024;
delete_list = (struct delete_list *)Realloc(delete_list, sizeof(delete_list[0])*dlist_alloc_len);
if (!delete_list) out_of_memory("add_delete_entry");
}
delete_list[dlist_len].dev = file->dev;
delete_list[dlist_len].inode = file->inode;
dlist_len++;
if (verbose > 3)
rprintf(FINFO,"added %s to delete list\n", f_name(file));
}
static void delete_one(struct file_struct *f)
{
if (!S_ISDIR(f->mode)) {
if (do_unlink(f_name(f)) != 0) {
rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno));
} else if (verbose) {
rprintf(FINFO,"deleting %s\n",f_name(f));
}
} else {
if (do_rmdir(f_name(f)) != 0) {
if (errno != ENOTEMPTY && errno != EEXIST)
rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno));
} else if (verbose) {
rprintf(FINFO,"deleting directory %s\n",f_name(f));
}
}
}
/* this deletes any files on the receiving side that are not present
on the sending side. For version 1.6.4 I have changed the behaviour
to match more closely what most people seem to expect of this option */
static void delete_files(struct file_list *flist)
{
struct file_list *local_file_list;
int i, j;
char *name;
if (cvs_exclude)
add_cvs_excludes();
if (io_error) {
rprintf(FINFO,"IO error encountered - skipping file deletion\n");
return;
}
for (j=0;j<flist->count;j++) {
if (!S_ISDIR(flist->files[j]->mode) ||
!(flist->files[j]->flags & FLAG_DELETE)) continue;
if (remote_version < 19 &&
delete_already_done(flist, j)) continue;
name = strdup(f_name(flist->files[j]));
if (!(local_file_list = send_file_list(-1,1,&name))) {
free(name);
continue;
}
if (verbose > 1)
rprintf(FINFO,"deleting in %s\n", name);
for (i=local_file_list->count-1;i>=0;i--) {
if (!local_file_list->files[i]->basename) continue;
if (remote_version < 19 &&
S_ISDIR(local_file_list->files[i]->mode))
add_delete_entry(local_file_list->files[i]);
if (-1 == flist_find(flist,local_file_list->files[i])) {
char *f = f_name(local_file_list->files[i]);
int k = strlen(f) - strlen(backup_suffix);
if (make_backups && ((k <= 0) ||
(strcmp(f+k,backup_suffix) != 0))) {
(void) make_backup(f);
} else {
delete_one(local_file_list->files[i]);
}
}
}
flist_free(local_file_list);
free(name);
}
}
static int get_tmpname(char *fnametmp, char *fname)
{
char *f;
/* open tmp file */
if (tmpdir) {
f = strrchr(fname,'/');
if (f == NULL)
f = fname;
else
f++;
if (strlen(tmpdir)+strlen(f)+10 > MAXPATHLEN) {
rprintf(FERROR,"filename too long\n");
return 0;
}
slprintf(fnametmp,MAXPATHLEN, "%s/.%s.XXXXXX",tmpdir,f);
return 1;
}
f = strrchr(fname,'/');
if (strlen(fname)+9 > MAXPATHLEN) {
rprintf(FERROR,"filename too long\n");
return 0;
}
if (f) {
*f = 0;
slprintf(fnametmp,MAXPATHLEN,"%s/.%s.XXXXXX",
fname,f+1);
*f = '/';
} else {
slprintf(fnametmp,MAXPATHLEN,".%s.XXXXXX",fname);
}
return 1;
}
static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname,
OFF_T total_size)
{
int i,n,remainder,len,count;
OFF_T offset = 0;
OFF_T offset2;
char *data;
static char file_sum1[MD4_SUM_LENGTH];
static char file_sum2[MD4_SUM_LENGTH];
char *map=NULL;
count = read_int(f_in);
n = read_int(f_in);
remainder = read_int(f_in);
sum_init();
for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) {
show_progress(offset, total_size);
if (i > 0) {
extern int cleanup_got_literal;
if (verbose > 3) {
rprintf(FINFO,"data recv %d at %d\n",
i,(int)offset);
}
stats.literal_data += i;
cleanup_got_literal = 1;
sum_update(data,i);
if (fd != -1 && write_file(fd,data,i) != i) {
rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno));
exit_cleanup(RERR_FILEIO);
}
offset += i;
continue;
}
i = -(i+1);
offset2 = i*n;
len = n;
if (i == count-1 && remainder != 0)
len = remainder;
stats.matched_data += len;
if (verbose > 3)
rprintf(FINFO,"chunk[%d] of size %d at %d offset=%d\n",
i,len,(int)offset2,(int)offset);
map = map_ptr(buf,offset2,len);
see_token(map, len);
sum_update(map,len);
if (fd != -1 && write_file(fd,map,len) != len) {
rprintf(FERROR,"write failed on %s : %s\n",
fname,strerror(errno));
exit_cleanup(RERR_FILEIO);
}
offset += len;
}
end_progress();
if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
rprintf(FERROR,"write failed on %s : %s\n",
fname,strerror(errno));
exit_cleanup(RERR_FILEIO);
}
sum_end(file_sum1);
if (remote_version >= 14) {
read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
if (verbose > 2) {
rprintf(FINFO,"got file_sum\n");
}
if (fd != -1 &&
memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) {
return 0;
}
}
return 1;
}
int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen)
{
int fd1,fd2;
STRUCT_STAT st;
char *fname;
char fnametmp[MAXPATHLEN];
char *fnamecmp;
char fnamecmpbuf[MAXPATHLEN];
struct map_struct *buf;
int i;
struct file_struct *file;
int phase=0;
int recv_ok;
extern struct stats stats;
struct stats initial_stats;
if (verbose > 2) {
rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
}
if (recurse && delete_mode && !local_name && flist->count>0) {
delete_files(flist);
}
while (1) {
cleanup_disable();
i = read_int(f_in);
if (i == -1) {
if (phase==0 && remote_version >= 13) {
phase++;
csum_length = SUM_LENGTH;
if (verbose > 2)
rprintf(FINFO,"recv_files phase=%d\n",phase);
write_int(f_gen,-1);
continue;
}
break;
}
if (i < 0 || i >= flist->count) {
rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
i, flist->count);
exit_cleanup(RERR_PROTOCOL);
}
file = flist->files[i];
fname = f_name(file);
stats.num_transferred_files++;
stats.total_transferred_size += file->length;
if (local_name)
fname = local_name;
if (dry_run) {
if (!am_server) {
log_transfer(file, fname);
}
continue;
}
initial_stats = stats;
if (verbose > 2)
rprintf(FINFO,"recv_files(%s)\n",fname);
fnamecmp = fname;
/* open the file */
fd1 = open(fnamecmp,O_RDONLY);
if ((fd1 == -1) && (compare_dest != NULL)) {
/* try the file at compare_dest instead */
slprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s",
compare_dest,fname);
fnamecmp = fnamecmpbuf;
fd1 = open(fnamecmp,O_RDONLY);
}
if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
rprintf(FERROR,"fstat %s : %s\n",fnamecmp,strerror(errno));
receive_data(f_in,NULL,-1,NULL,file->length);
close(fd1);
continue;
}
if (fd1 != -1 && !S_ISREG(st.st_mode)) {
rprintf(FERROR,"%s : not a regular file (recv_files)\n",fnamecmp);
receive_data(f_in,NULL,-1,NULL,file->length);
close(fd1);
continue;
}
if (fd1 != -1 && st.st_size > 0) {
buf = map_file(fd1,st.st_size);
if (verbose > 2)
rprintf(FINFO,"recv mapped %s of size %d\n",fnamecmp,(int)st.st_size);
} else {
buf = NULL;
}
if (!get_tmpname(fnametmp,fname)) {
if (buf) unmap_file(buf);
if (fd1 != -1) close(fd1);
continue;
}
/* mktemp is deliberately used here instead of mkstemp.
because O_EXCL is used on the open, the race condition
is not a problem or a security hole, and we want to
control the access permissions on the created file. */
if (NULL == do_mktemp(fnametmp)) {
rprintf(FERROR,"mktemp %s failed\n",fnametmp);
receive_data(f_in,buf,-1,NULL,file->length);
if (buf) unmap_file(buf);
if (fd1 != -1) close(fd1);
continue;
}
/* we initially set the perms without the
setuid/setgid bits to ensure that there is no race
condition. They are then correctly updated after
the lchown. Thanks to snabb@epipe.fi for pointing
this out */
fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL,
file->mode & ACCESSPERMS);
if (fd2 == -1 && relative_paths && errno == ENOENT &&
create_directory_path(fnametmp) == 0) {
fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL,
file->mode & ACCESSPERMS);
}
if (fd2 == -1) {
rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno));
receive_data(f_in,buf,-1,NULL,file->length);
if (buf) unmap_file(buf);
if (fd1 != -1) close(fd1);
continue;
}
cleanup_set(fnametmp, fname, file, buf, fd1, fd2);
if (!am_server) {
log_transfer(file, fname);
}
/* recv file data */
recv_ok = receive_data(f_in,buf,fd2,fname,file->length);
log_recv(file, &initial_stats);
if (buf) unmap_file(buf);
if (fd1 != -1) {
close(fd1);
}
close(fd2);
if (verbose > 2)
rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname);
finish_transfer(fname, fnametmp, file);
cleanup_disable();
if (!recv_ok) {
if (csum_length == SUM_LENGTH) {
rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
fname);
} else {
if (verbose > 1)
rprintf(FINFO,"redoing %s(%d)\n",fname,i);
write_int(f_gen,i);
}
}
}
if (preserve_hard_links)
do_hard_links(flist);
/* now we need to fix any directory permissions that were
modified during the transfer */
for (i = 0; i < flist->count; i++) {
file = flist->files[i];
if (!file->basename || !S_ISDIR(file->mode)) continue;
recv_generator(f_name(file),flist,i,-1);
}
if (verbose > 2)
rprintf(FINFO,"recv_files finished\n");
return 0;
}