static char *gen_endfile_str(void)
{
uint64_t bytes;
uint8_t checksum[MD5_DIGEST_LENGTH];
bytes=prng_next64();
prng_md5sum(checksum);
return get_endfile_str(bytes, checksum);
}
int write_endfile(struct asfd *asfd, uint64_t bytes, uint8_t *checksum)
{
return asfd->write_str(asfd,
CMD_END_FILE, get_endfile_str(bytes, checksum));
}
static int write_endfile(struct asfd *asfd, unsigned long long bytes)
{
return asfd->write_str(asfd, CMD_END_FILE, get_endfile_str(bytes));
}
static int resume_partial_new_file(struct sbuf *p1b, struct cntr *cntr, const char *currentdata, const char *datadirtmp, const char *deltmppath, struct dpth *dpth, struct config *cconf)
{
int ret=0;
int junk=0;
struct sbuf cb;
char *rpath=NULL;
int istreedata=0;
struct stat statp;
char *partial=NULL;
char *partialdir=NULL;
char *zdeltmp=NULL;
// It does not matter what this checksum is set to.
// This is just to get an endfile string in the format that
// process_changed_file expects.
unsigned char checksum[18]="0123456789ABCDEF";
// Need to set up a fake current sbuf.
init_sbuf(&cb);
cb.cmd=p1b->cmd;
cb.compression=p1b->compression;
cb.path=strdup(p1b->path);
cb.statbuf=strdup(p1b->statbuf);
if(!(rpath=set_new_datapth(&cb, datadirtmp, dpth, &istreedata, cconf)))
{
ret=-1;
goto end;
}
if(!(partialdir=prepend_s(datadirtmp, "p", strlen("p")))
|| !(partial=prepend_s(partialdir,
cb.datapth, strlen(cb.datapth)))
|| build_path(partialdir, cb.datapth, strlen(cb.datapth),
&partial, partialdir))
{
ret=-1;
goto end;
}
if(!lstat(partial, &statp) && S_ISREG(statp.st_mode))
{
// A previous resume was going on.
// Need to concatenate the possible delta onto the partial
// file.
FILE *dfp=NULL;
gzFile dzp=NULL;
logp("Resume previously resumed partial new file: %s %s\n",
cb.path, rpath);
if(!(cb.endfile=strdup(
get_endfile_str(statp.st_size, checksum))))
{
ret=-1;
goto end;
}
if(cb.compression)
{
// Recreate partial, in case it was only partially
// written and consequently has gz errors.
if(!(zdeltmp=prepend(deltmppath, ".z", strlen(".z"),
0 /* no slash */))
|| !(dzp=gzopen_file(zdeltmp, "wb"))
|| copy_gzpath_to_gzFile(partial, dzp)
|| do_rename(zdeltmp, partial))
{
ret=-1;
goto end;
}
}
else
{
// Just append to the existing one.
if(!(dfp=open_file(partial, "ab")))
{
ret=-1;
goto end;
}
}
if(!lstat(deltmppath, &statp) && S_ISREG(statp.st_mode))
{
if(cb.compression)
{
if(copy_gzpath_to_gzFile(deltmppath, dzp))
{
ret=-1;
goto end;
}
}
else
{
if(copy_path_to_File(deltmppath, dfp))
{
ret=-1;
goto end;
}
}
}
if(dfp && close_fp(&dfp))
{
ret=-1;
goto end;
}
if(dzp && gzclose_fp(&dzp))
{
ret=-1;
goto end;
}
if(process_changed_file(&cb, p1b, partialdir, NULL, NULL,
&junk /* resume_partial=0 */,
cntr, cconf))
{
ret=-1;
goto end;
}
if(!istreedata) incr_dpth(dpth, cconf);
goto end;
}
logp("Resume partial new file: %s %s\n", cb.path, rpath);
if(!lstat(rpath, &statp) && S_ISREG(statp.st_mode))
{
if(!(cb.endfile=strdup(
get_endfile_str(statp.st_size, checksum))))
{
ret=-1;
goto end;
}
// If compression is on, be careful with gzip unexpected
// end of file errors.
// Otherwise, just rename the whole file.
unlink(partial);
if(cb.compression)
{
if(copy_gzpath_to_gzpath(rpath, partial))
{
logp("Error in copy_gzpath_to_gzpath\n");
ret=-1;
goto end;
}
// delete the original.
if(unlink(rpath))
{
logp("Failed to unlink %s: %s\n",
rpath, strerror(errno));
return -1;
}
}
else
{
if(do_rename(rpath, partial))
{
ret=-1;
goto end;
}
}
// So, we have created a new directory beginning with 'p',
// and moved the partial download to it.
// We can now use the partial file as the basis of a librsync
// transfer.
if(process_changed_file(&cb, p1b, partialdir, NULL, NULL,
&junk /* resume_partial=0 */,
cntr, cconf))
{
ret=-1;
goto end;
}
if(!istreedata) incr_dpth(dpth, cconf);
goto end;
}
logp("Actually, no - just treat it as completely new\n");
end:
if(rpath) free(rpath);
if(partialdir) free(partialdir);
if(partial) free(partial);
if(zdeltmp) free(zdeltmp);
free_sbuf(&cb);
return ret;
}
