enum modstatdb_rw
modstatdb_open(enum modstatdb_rw readwritereq)
{
modstatdb_init();
cflags = readwritereq & msdbrw_available_mask;
readwritereq &= ~msdbrw_available_mask;
switch (readwritereq) {
case msdbrw_needsuperuser:
case msdbrw_needsuperuserlockonly:
if (getuid() || geteuid())
ohshit(_("requested operation requires superuser privilege"));
/* Fall through. */
case msdbrw_write:
case msdbrw_writeifposs:
if (access(dpkg_db_get_dir(), W_OK)) {
if (errno != EACCES)
ohshite(_("unable to access dpkg status area"));
else if (readwritereq == msdbrw_write)
ohshit(_("operation requires read/write access to dpkg status area"));
cstatus= msdbrw_readonly;
} else {
modstatdb_lock();
cstatus= (readwritereq == msdbrw_needsuperuserlockonly ?
msdbrw_needsuperuserlockonly :
msdbrw_write);
}
break;
case msdbrw_readonly:
cstatus= msdbrw_readonly;
break;
default:
internerr("unknown modstatdb_rw '%d'", readwritereq);
}
dpkg_arch_load_list();
if (cstatus != msdbrw_needsuperuserlockonly) {
cleanupdates();
if (cflags >= msdbrw_available_readonly)
parsedb(availablefile, pdb_parse_available, NULL);
}
if (cstatus >= msdbrw_write) {
createimptmp();
varbuf_init(&uvb, 10240);
}
trig_fixup_awaiters(cstatus);
trig_incorporate(cstatus);
return cstatus;
}
enum modstatdb_rw modstatdb_init(const char *adir, enum modstatdb_rw readwritereq) {
const struct fni *fnip;
admindir= adir;
for (fnip=fnis; fnip->suffix; fnip++) {
free(*fnip->store);
*fnip->store= m_malloc(strlen(adir)+strlen(fnip->suffix)+2);
sprintf(*fnip->store, "%s/%s", adir, fnip->suffix);
}
cflags= readwritereq & msdbrw_flagsmask;
readwritereq &= ~msdbrw_flagsmask;
switch (readwritereq) {
case msdbrw_needsuperuser:
case msdbrw_needsuperuserlockonly:
if (getuid() || geteuid())
ohshit(_("requested operation requires superuser privilege"));
/* fall through */
case msdbrw_write: case msdbrw_writeifposs:
if (access(adir,W_OK)) {
if (errno != EACCES)
ohshite(_("unable to access dpkg status area"));
else if (readwritereq == msdbrw_write)
ohshit(_("operation requires read/write access to dpkg status area"));
cstatus= msdbrw_readonly;
} else {
lockdatabase(adir);
cstatus= (readwritereq == msdbrw_needsuperuserlockonly ?
msdbrw_needsuperuserlockonly :
msdbrw_write);
}
break;
case msdbrw_readonly:
cstatus= msdbrw_readonly; break;
default:
internerr("unknown modstatdb_rw '%d'", readwritereq);
}
updatefnbuf= m_malloc(strlen(adir)+sizeof(UPDATESDIR)+IMPORTANTMAXLEN+5);
strcpy(updatefnbuf,adir);
strcat(updatefnbuf,"/" UPDATESDIR);
updatefnrest= updatefnbuf+strlen(updatefnbuf);
if (cstatus != msdbrw_needsuperuserlockonly) {
cleanupdates();
if(!(cflags & msdbrw_noavail))
parsedb(availablefile,
pdb_recordavailable|pdb_rejectstatus,
NULL,NULL,NULL);
}
if (cstatus >= msdbrw_write) {
createimptmp();
varbufinit(&uvb, 10240);
}
trig_fixup_awaiters(cstatus);
trig_incorporate(cstatus, admindir);
return cstatus;
}
