int send_msg_fzp(struct fzp *fzp, enum cmd cmd, const char *buf, size_t s)
{
if(fzp_printf(fzp, "%c%04X", cmd, (unsigned int)s)!=5
|| fzp_write(fzp, buf, s)!=s
|| fzp_printf(fzp, "\n")!=1)
{
logp("Unable to write message to file: %s\n", strerror(errno));
return -1;
}
return 0;
}
void logp(const char *fmt, ...)
{
#ifndef UTEST
int pid;
char buf[512]="";
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
pid=(int)getpid();
if(logfzp)
fzp_printf(logfzp, "%s: %s[%d] %s", gettm(), prog, pid, buf);
else
{
if(do_syslog)
syslog(LOG_INFO, "%s", buf);
if(do_stdout)
{
if(json)
{
char *cp=NULL;
if((cp=strrchr(buf, '\n'))) *cp='\0';
// To help programs parsing the monitor output,
// log things with simple JSON.
fprintf(stdout, "{ \"logline\": \"%s\" }\n", buf);
}
else
fprintf(stdout, "%s: %s[%d] %s",
gettm(), prog, pid, buf);
}
}
va_end(ap);
#endif
}
struct slist *build_manifest_with_data_files(const char *path,
const char *datapath, int entries, int data_files)
{
struct blk *b=NULL;
struct slist *slist=NULL;
struct manio *manio=NULL;
struct fzp *fzp=NULL;
char spath[256]="";
char cpath[256]="";
fail_unless((manio=manio_open_phase3(path, "wb", PROTO_2,
RMANIFEST_RELATIVE))!=NULL);
slist=do_build_manifest(manio, PROTO_2, entries, data_files);
fail_unless(!manio_close(&manio));
for(b=slist->blist->head; b; b=b->next)
{
snprintf(spath, sizeof(spath), "%s/%s", datapath,
uint64_to_savepathstr(b->savepath));
if(strcmp(spath, cpath))
{
snprintf(cpath, sizeof(cpath), "%s", spath);
fzp_close(&fzp);
}
if(!fzp)
{
fail_unless(!build_path_w(cpath));
fail_unless((fzp=fzp_open(cpath, "wb"))!=NULL);
}
fzp_printf(fzp, "%c%04X%s", CMD_DATA, strlen("data"), "data");
}
fzp_close(&fzp);
return slist;
}
static int gzprintf_hooks(struct fzp *fzp, struct hooks *hooks)
{
size_t i;
fzp_printf(fzp, "%c%04lX%s\n", CMD_MANIFEST,
strlen(hooks->path), hooks->path);
for(i=0; i<hooks->len; i++)
if(to_fzp_fingerprint(fzp, hooks->fingerprints[i]))
return -1;
return 0;
}
static int gzprintf_hooks(struct fzp *fzp, struct hooks *hooks)
{
static char *f;
static char ftmp[WEAK_STR_LEN];
size_t len=strlen(hooks->fingerprints);
// printf("NW: %c%04lX%s\n", CMD_MANIFEST,
// strlen(hooks->path), hooks->path);
// FIX THIS: The path could be long, and fzp_printf will truncate at
// 512 characters.
fzp_printf(fzp, "%c%04lX%s\n", CMD_MANIFEST,
strlen(hooks->path), hooks->path);
for(f=hooks->fingerprints; f<hooks->fingerprints+len; f+=WEAK_LEN)
{
snprintf(ftmp, sizeof(ftmp), "%s", f);
fzp_printf(fzp, "%c%04lX%s\n", CMD_FINGERPRINT,
strlen(ftmp), ftmp);
}
return 0;
}
static int write_hook_header(struct manio *manio,
struct fzp *fzp, const char *comp)
{
const char *cp;
char *tmp=NULL;
cp=manio->rdirectory+strlen(manio->base_dir);
while(cp && *cp=='/') cp++;
if(!(tmp=prepend_s(cp, comp))) return -1;
// FIX THIS: fzp_printf will truncate at 512 characters.
fzp_printf(fzp, "%c%04X%s\n", CMD_MANIFEST, strlen(tmp), tmp);
free_w(&tmp);
return 0;
}
// For the counters.
void logc(const char *fmt, ...)
{
char buf[512]="";
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
if(logfzp)
fzp_printf(logfzp, "%s", buf); // for the server side
else
{
if(do_progress_counter
&& do_stdout)
fprintf(stdout, "%s", buf);
}
va_end(ap);
}
void build_sparse_index(const char *path, int manifests, int fingerprints)
{
struct fzp *fzp;
fail_unless(!build_path_w(path));
fail_unless((fzp=fzp_gzopen(path, "wb"))!=NULL);
for(int m=0; m<manifests; m++)
{
char mpath[256];
snprintf(mpath, sizeof(mpath), "some/manifest/%d", m);
fzp_printf(fzp, "%c%04lX%s\n",
CMD_MANIFEST, strlen(mpath), mpath);
for(int f=0; f<fingerprints; f++)
fail_unless(!to_fzp_fingerprint(fzp, prng_next64()));
}
fail_unless(!fzp_close(&fzp));
}
static int sort_and_write_hooks(struct manio *manio)
{
int i;
int ret=-1;
struct fzp *fzp=NULL;
char comp[32]="";
char *path=NULL;
int hook_count=manio->hook_count;
char **hook_sort=manio->hook_sort;
if(!hook_sort) return 0;
snprintf(comp, sizeof(comp), "%08"PRIX64, manio->offset.fcount-1);
if(!(path=prepend_s(manio->hook_dir, comp))
|| build_path_w(path)
|| !(fzp=fzp_gzopen(path, manio->mode)))
goto end;
qsort(hook_sort, hook_count, sizeof(char *), strsort);
if(write_hook_header(manio, fzp, comp)) goto end;
for(i=0; i<hook_count; i++)
{
// Do not bother with duplicates.
if(i && !strcmp(hook_sort[i],
hook_sort[i-1])) continue;
fzp_printf(fzp, "%c%04X%s\n", CMD_FINGERPRINT,
(unsigned int)strlen(hook_sort[i]), hook_sort[i]);
}
if(fzp_close(&fzp))
{
logp("Error closing %s in %s: %s\n",
path, __func__, strerror(errno));
goto end;
}
if(manio_write_fcount(manio)) goto end;
manio->hook_count=0;
ret=0;
end:
fzp_close(&fzp);
free_w(&path);
return ret;
}
static int write_incexc(const char *realworking, const char *incexc)
{
int ret=-1;
struct fzp *fzp=NULL;
char *path=NULL;
if(!incexc || !*incexc) return 0;
if(!(path=prepend_s(realworking, "incexc"))
|| !(fzp=fzp_open(path, "wb")))
goto end;
fzp_printf(fzp, "%s", incexc);
ret=0;
end:
if(fzp_close(&fzp))
{
logp("error writing to %s in write_incexc\n", path);
ret=-1;
}
free_w(&path);
return ret;
}
// Backup phase4 needs to know the fcount, so leave a file behind that
// contains it (otherwise phase4 will have to read and sort the directory
// contents).
static int manio_write_fcount(struct manio *manio)
{
int ret=-1;
struct fzp *fzp=NULL;
char *path=NULL;
if(!(path=get_fcount_path(manio))
|| !(fzp=fzp_open(path, "wb")))
goto end;
if(fzp_printf(fzp, "%08"PRIX64"\n", manio->offset->fcount)!=9)
{
logp("Short write when writing to %s\n", path);
goto end;
}
ret=0;
end:
if(fzp_close(&fzp))
{
logp("Could not close file pointer to %s\n", path);
ret=-1;
}
free_w(&path);
return ret;
}
int backup_phase4_server_protocol1(struct sdirs *sdirs, struct conf **cconfs)
{
int ret=-1;
struct stat statp;
char realcurrent[256]="";
uint64_t bno=0;
int hardlinked_current=0;
char tstmp[64]="";
int previous_backup=0;
struct fdirs *fdirs=NULL;
readlink_w(sdirs->current, realcurrent, sizeof(realcurrent));
if(!(fdirs=fdirs_alloc())
|| fdirs_init(fdirs, sdirs, realcurrent))
goto end;
if(log_fzp_set(fdirs->logpath, cconfs))
goto end;
logp("Begin phase4 (shuffle files)\n");
if(write_status(CNTR_STATUS_SHUFFLING, NULL, get_cntr(cconfs)))
goto end;
if(!lstat(sdirs->current, &statp)) // Had a previous backup.
{
previous_backup++;
if(lstat(fdirs->hlinkedcurrent, &statp))
{
hardlinked_current=0;
logp("Previous backup is not a hardlinked_archive\n");
logp(" will generate reverse deltas\n");
}
else
{
hardlinked_current=1;
logp("Previous backup is a hardlinked_archive\n");
logp(" will not generate reverse deltas\n");
}
// If current was not a hardlinked_archive, need to duplicate
// it.
if(!hardlinked_current && lstat(fdirs->currentdup, &statp))
{
// Have not duplicated the current backup yet.
if(!lstat(fdirs->currentduptmp, &statp))
{
logp("Removing previous directory: %s\n",
fdirs->currentduptmp);
if(recursive_delete(fdirs->currentduptmp))
{
logp("Could not delete %s\n",
fdirs->currentduptmp);
goto end;
}
}
logp("Duplicating current backup.\n");
if(recursive_hardlink(sdirs->current,
fdirs->currentduptmp, cconfs)
// The rename race condition is of no consequence here
// because currentdup does not exist.
|| do_rename(fdirs->currentduptmp, fdirs->currentdup))
goto end;
}
}
if(timestamp_read(fdirs->timestamp, tstmp, sizeof(tstmp)))
{
logp("could not read timestamp file: %s\n",
fdirs->timestamp);
goto end;
}
// Get the backup number.
bno=strtoull(tstmp, NULL, 10);
// Determine whether the new backup should be a hardlinked
// archive or not, from the confs and the backup number...
if(need_hardlinked_archive(cconfs, bno))
{
// Create a file to indicate that the previous backup
// does not have others depending on it.
struct fzp *hfp=NULL;
if(!(hfp=fzp_open(fdirs->hlinked, "wb"))) goto end;
// Stick the next backup timestamp in it. It might
// be useful one day when wondering when the next
// backup, now deleted, was made.
fzp_printf(hfp, "%s\n", tstmp);
if(fzp_close(&hfp))
{
logp("error closing hardlinked indication\n");
goto end;
}
}
else
unlink(fdirs->hlinked);
if(atomic_data_jiggle(sdirs, fdirs, hardlinked_current, cconfs))
{
logp("could not finish up backup.\n");
goto end;
}
if(write_status(CNTR_STATUS_SHUFFLING,
"deleting temporary files", get_cntr(cconfs)))
goto end;
// Remove the temporary data directory, we have now removed
// everything useful from it.
recursive_delete(fdirs->datadirtmp);
// Clean up the currentdata directory - this is now the 'old'
// currentdata directory. Any files that were deleted from
// the client will be left in there, so call recursive_delete
// with the option that makes it not delete files.
// This will have the effect of getting rid of unnecessary
// directories.
recursive_delete_dirs_only(fdirs->currentdupdata);
// Rename the old current to something that we know to delete.
if(previous_backup && !hardlinked_current)
{
if(deleteme_move(sdirs,
fdirs->fullrealcurrent, realcurrent, cconfs)
// I have tested that potential race conditions on the
// rename() are automatically recoverable here.
|| do_rename(fdirs->currentdup, fdirs->fullrealcurrent))
goto end;
}
if(deleteme_maybe_delete(cconfs, sdirs))
goto end;
logp("End phase4 (shuffle files)\n");
ret=0;
end:
fdirs_free(&fdirs);
return ret;
}
