bc088a5ad8
* Minor documentation/re-coding in chat.c. * More work on ticket #41. git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@10471 54d463be-8e91-2dee-dedb-b68131a5f0ec
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
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// For more information, see LICENCE in the main folder
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#include "../common/cbasetypes.h"
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#include "../common/showmsg.h"
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#include "lock.h"
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#ifndef WIN32
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#include <unistd.h>
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#else
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#include <windows.h>
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#define F_OK 0x0
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#define R_OK 0x4
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#endif
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#ifndef WIN32
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#define exists(filename) (!access(filename, F_OK))
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#else
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// could be speed up maybe?
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int exists(char *file) {
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FILE *fp;
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if ((fp = fopen(file,"r")) && fclose(fp) == 0) return 1;
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return 0;
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}
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#endif
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// 書き込みファイルの保護処理
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// （書き込みが終わるまで、旧ファイルを保管しておく）
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// 新しいファイルの書き込み開始
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FILE* lock_fopen (const char* filename, int *info) {
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char newfile[512];
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FILE *fp;
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int no = 0;
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// 安全なファイル名を得る（手抜き）
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do {
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sprintf(newfile, "%s_%04d.tmp", filename, ++no);
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} while((fp = fopen(newfile,"r")) && (fclose(fp), no < 9999));
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*info = no;
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return fopen(newfile,"w");
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}
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// 旧ファイルを削除＆新ファイルをリネーム
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int lock_fclose (FILE *fp, const char* filename, int *info) {
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int ret = 1;
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char newfile[512];
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char oldfile[512];
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if (fp != NULL) {
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ret = fclose(fp);
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sprintf(newfile, "%s_%04d.tmp", filename, *info);
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sprintf(oldfile, "%s.bak", filename); // old backup file
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if (exists(oldfile)) remove(oldfile); // remove backup file if it already exists
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rename (filename, oldfile); // backup our older data instead of deleting it
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// このタイミングで落ちると最悪。
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if ((ret = rename(newfile,filename)) != 0) { // rename our temporary file to its correct name
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#if defined(__NETBSD__) || defined(_WIN32) || defined(sun) || defined (_sun) || defined (__sun__)
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ShowError("%s - '"CL_WHITE"%s"CL_RESET"'\n", strerror(errno), newfile);
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#else
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char ebuf[255];
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ShowError("%s - '"CL_WHITE"%s"CL_RESET"'\n", strerror_r(errno, ebuf, sizeof(ebuf)), newfile);
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#endif
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}
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}
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return ret;
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}
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