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Make server check game state file sizes on startup

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Certain tables have a fixed size depending on configuration: EF_SECTOR
has WORLD_SZ() elements, EF_NATION, EF_MAP and EF_BMAP have MAXNOC
elements, and EF_REALM has MAXNOC * MAXNOR elements.  Bad things
happen if the files backing them are shorter.

Pass expected size to ef_open(), and make it fail when the actual size
differs.
This commit is contained in:
Markus Armbruster 2008-05-17 17:00:57 +02:00
parent b37ebbbde3
commit 5750107b65
5 changed files with 30 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/file.h
View file

@ -181,7 +181,7 @@ extern int ef_read(int, int, void *);
extern void *ef_ptr(int, int);
extern char *ef_nameof(int);
extern time_t ef_mtime(int);
extern int ef_open(int, int);
extern int ef_open(int, int, int);
extern int ef_check(int);
extern int ef_close(int);
extern int ef_flush(int);

9
src/lib/common/file.c
View file

@ -55,11 +55,12 @@ static void do_blank(struct empfile *, void *, int, int);
* Open the file-backed table TYPE (EF_SECTOR, ...).
* HOW are flags to control operation. Naturally, immutable flags are
* not permitted.
* If NELT is non-negative, the table must have that many elements.
* Return non-zero on success, zero on failure.
* You must call ef_close() before the next ef_open().
*/
int
ef_open(int type, int how)
ef_open(int type, int how, int nelt)
{
struct empfile *ep;
struct flock lock;
@ -105,6 +106,12 @@ ef_open(int type, int how)
return 0;
}
ep->fids = fsiz / ep->size;
if (nelt >= 0 && nelt != ep->fids) {
logerror("Can't open %s (got %d records instead of %d)",
ep->file, ep->fids, nelt);
close(fd);
return 0;
}
/* allocate cache */
if (ep->flags & EFF_STATIC) {

36
src/lib/subs/fileinit.c
View file

@ -34,6 +34,8 @@
#include <config.h>
#include "file.h"
#include "nat.h"
#include "optlist.h"
#include "prototypes.h"
struct fileinit {
@ -86,23 +88,23 @@ ef_open_srv(void)
{
int failed = 0;
failed |= !ef_open(EF_NATION, EFF_MEM);
failed |= !ef_open(EF_SECTOR, EFF_MEM);
failed |= !ef_open(EF_SHIP, EFF_MEM);
failed |= !ef_open(EF_PLANE, EFF_MEM);
failed |= !ef_open(EF_LAND, EFF_MEM);
failed |= !ef_open(EF_GAME, EFF_MEM);
failed |= !ef_open(EF_NEWS, 0);
failed |= !ef_open(EF_LOAN, 0);
failed |= !ef_open(EF_TREATY, 0);
failed |= !ef_open(EF_NUKE, EFF_MEM);
failed |= !ef_open(EF_POWER, 0);
failed |= !ef_open(EF_TRADE, 0);
failed |= !ef_open(EF_MAP, EFF_MEM);
failed |= !ef_open(EF_BMAP, EFF_MEM);
failed |= !ef_open(EF_COMM, 0);
failed |= !ef_open(EF_LOST, 0);
failed |= !ef_open(EF_REALM, EFF_MEM);
failed |= !ef_open(EF_NATION, EFF_MEM, MAXNOC);
failed |= !ef_open(EF_SECTOR, EFF_MEM, WORLD_SZ());
failed |= !ef_open(EF_SHIP, EFF_MEM, -1);
failed |= !ef_open(EF_PLANE, EFF_MEM, -1);
failed |= !ef_open(EF_LAND, EFF_MEM, -1);
failed |= !ef_open(EF_GAME, EFF_MEM, 1);
failed |= !ef_open(EF_NEWS, 0, -1);
failed |= !ef_open(EF_LOAN, 0, -1);
failed |= !ef_open(EF_TREATY, 0, -1);
failed |= !ef_open(EF_NUKE, EFF_MEM, -1);
failed |= !ef_open(EF_POWER, 0, -1);
failed |= !ef_open(EF_TRADE, 0, -1);
failed |= !ef_open(EF_MAP, EFF_MEM, MAXNOC);
failed |= !ef_open(EF_BMAP, EFF_MEM, MAXNOC);
failed |= !ef_open(EF_COMM, 0, -1);
failed |= !ef_open(EF_LOST, 0, -1);
failed |= !ef_open(EF_REALM, EFF_MEM, MAXNOC * MAXNOR);
if (!failed)
failed |= ef_init_view(EF_COUNTRY, EF_NATION);
if (failed) {

2
src/util/empdump.c
View file

@ -136,7 +136,7 @@ main(int argc, char *argv[])
for (i = 0; i < EF_MAX; i++) {
if (!EF_IS_GAME_STATE(i))
continue;
if (!ef_open(i, EFF_MEM | private))
if (!ef_open(i, EFF_MEM | private, -1))
exit(1);
}

2
src/util/files.c
View file

@ -131,7 +131,7 @@ main(int argc, char *argv[])
for (i = 0; i < EF_MAX; i++) {
if (!EF_IS_GAME_STATE(i))
continue;
if (!ef_open(i, EFF_CREATE)) {
if (!ef_open(i, EFF_CREATE, -1)) {
perror("ef_open");
exit(1);
}