Truncate *.hash files during maintenance to accomodate max-msgs or max-crcs

number of hash sets (don't let these files grow indefinitely).

src/sbbs3/smbutil.c

@@ -641,6 +641,34 @@ void maint(void)
 			,beep,i,smb.last_error);
 		return; 
 	}
+	if(smb_open_hash(&smb) == SMB_SUCCESS)
+	{
+		ulong max_hashes=0;
+
+		printf("Maintaining %s hash file\r\n", smb.file);
+
+		if((smb.status.attr&(SMB_EMAIL|SMB_NOHASH)) == 0) {
+			max_hashes = smb.status.max_msgs;
+			if(smb.status.max_crcs > max_hashes)
+				max_hashes = smb.status.max_crcs;
+		}
+		if(!max_hashes) {
+			CHSIZE_FP(smb.hash_fp,0);
+		} else if(filelength(fileno(smb.hash_fp)) > (long)(max_hashes * SMB_HASH_SOURCE_TYPES * sizeof(hash_t))) {
+			if(fseek(smb.hash_fp, -((long)(max_hashes * SMB_HASH_SOURCE_TYPES * sizeof(hash_t))), SEEK_END) == 0) {
+				hash_t*	hashes = malloc(max_hashes * SMB_HASH_SOURCE_TYPES * sizeof(hash_t));
+				if(hashes != NULL) {
+					if(fread(hashes, sizeof(hash_t), max_hashes * SMB_HASH_SOURCE_TYPES, smb.hash_fp) == max_hashes * SMB_HASH_SOURCE_TYPES) {
+						CHSIZE_FP(smb.hash_fp,0);
+						rewind(smb.hash_fp);
+						fwrite(hashes, sizeof(hash_t), max_hashes * SMB_HASH_SOURCE_TYPES, smb.hash_fp);
+					}
+					free(hashes);
+				}
+			}
+		}
+		smb_close_hash(&smb);
+	}
 	if(!smb.status.total_msgs) {
 		smb_unlocksmbhdr(&smb);
 		printf("Empty\n");
@@ -919,7 +947,7 @@ void packmsgs(ulong packable)
 		}
 
 		if(packable && (m*SDT_BLOCK_LEN)+(n*SHD_BLOCK_LEN)<packable*1024L) {
-			printf("\rLess than %luk compressible bytes.\n\n",packable);
+			printf("\r%lu less than %lu compressible bytes.\n\n",(m*SDT_BLOCK_LEN)+(n*SHD_BLOCK_LEN), packable*1024L);
 			smb_close_ha(&smb);
 			smb_close_da(&smb);
 			smb_unlocksmbhdr(&smb);
@@ -974,7 +1002,7 @@ void packmsgs(ulong packable)
 		}
 
 		if(packable && (n*SDT_BLOCK_LEN)+(m*SHD_BLOCK_LEN)<packable*1024L) {
-			printf("\rLess than %luk compressible bytes.\n\n",packable);
+			printf("\r%lu less than %lu compressible bytes.\n\n",(n*SDT_BLOCK_LEN)+(m*SHD_BLOCK_LEN), packable*1024);
 			smb_unlocksmbhdr(&smb);
 			return; 
 		}