static int merge_into_global_sparse(const char *sparse, const char *global,
struct conf **confs)
{
int ret=-1;
char *tmpfile=NULL;
struct stat statp;
char *lockfile=NULL;
struct lock *lock=NULL;
const char *globalsrc=NULL;
if(!(tmpfile=prepend_n(global, "tmp", strlen("tmp"), ".")))
goto end;
// Get a lock before messing with the global sparse index.
if(!(lockfile=prepend_n(global, "lock", strlen("lock"), "."))
|| !(lock=lock_alloc_and_init(lockfile)))
goto end;
if(try_to_get_lock(lock)) goto end;
if(!lstat(global, &statp)) globalsrc=global;
if(merge_sparse_indexes(sparse, globalsrc, tmpfile, confs))
goto end;
// FIX THIS: nasty race condition needs to be recoverable.
if(do_rename(tmpfile, global)) goto end;
ret=0;
end:
lock_release(lock);
lock_free(&lock);
if(lockfile) free(lockfile);
if(tmpfile) free(tmpfile);
return ret;
}
struct asfd *champ_chooser_connect(struct async *as,
struct sdirs *sdirs, struct conf **confs)
{
int champsock=-1;
char *champname=NULL;
struct asfd *chfd=NULL;
const char *cname=NULL;
// Connect to champ chooser now.
// This may start up a new champ chooser. On a machine with multiple
// cores, it may be faster to do now, way before it is actually needed
// in phase2.
if((champsock=connect_to_champ_chooser(sdirs, confs))<0)
{
logp("could not connect to champ chooser\n");
goto error;
}
if(!(chfd=setup_asfd(as, "champ chooser socket", &champsock, NULL,
ASFD_STREAM_STANDARD, ASFD_FD_SERVER_TO_CHAMP_CHOOSER, -1,
confs))) goto error;
cname=get_string(confs[OPT_CNAME]);
if(!(champname=prepend_n("cname", cname, strlen(cname), ":")))
goto error;
if(chfd->write_str(chfd, CMD_GEN, champname)
|| chfd->read_expect(chfd, CMD_GEN, "cname ok"))
goto error;
free(champname);
return chfd;
error:
free(champname);
as->asfd_remove(as, chfd);
asfd_free(&chfd);
close_fd(&champsock);
return NULL;
}
static char *get_global_sparse_tmp(const char *global)
{
return prepend_n(global, "tmp", strlen("tmp"), ".");
}
