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* Added back up old files in 'save' before saving new data

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git-svn-id: https://svn.code.sf.net/p/rathena/svn/branches/stable@1353 54d463be-8e91-2dee-dedb-b68131a5f0ec
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celest 2005-03-31 10:56:19 +00:00
parent c89903cdf1
commit 4109792003
2 changed files with 23 additions and 13 deletions
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4
Changelog-SVN.txt
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@ -1,6 +1,10 @@
Date Added
03/31
* Added back up old files in 'save' before saving new data -- also fixes
'Access denied' errors when saving in TXT
03/30
* sql native vc7 projects now build/link [1351: MouseJstr]
* Began sql projects for VC7 [1349: MouseJstr]

32
src/common/lock.c
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@ -2,42 +2,48 @@
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "lock.h"
#include "showmsg.h"
#define exists(filename) (!access(filename, F_OK))
// 書き込みファイルの保護処理
// （書き込みが終わるまで、旧ファイルを保管しておく）
// 新しいファイルの書き込み開始
FILE* lock_fopen(const char* filename,int *info) {
FILE* lock_fopen (const char* filename, int *info) {
char newfile[512];
FILE *fp;
int no = 0;
int no = 0;
// 安全なファイル名を得る（手抜き）
do {
sprintf(newfile,"%s_%04d.tmp",filename,++no);
} while((fp = fopen(newfile,"r")) && (fclose(fp), no<9999) );
sprintf(newfile, "%s_%04d.tmp", filename, ++no);
} while((fp = fopen(newfile,"r")) && (fclose(fp), no < 9999));
*info = no;
return fopen(newfile,"w");
}
// 旧ファイルを削除＆新ファイルをリネーム
int lock_fclose(FILE *fp,const char* filename,int *info) {
int ret = 0;
int lock_fclose (FILE *fp, const char* filename, int *info) {
int ret = 1;
char newfile[512];
if(fp != NULL) {
char oldfile[512];
if (fp != NULL) {
ret = fclose(fp);
sprintf(newfile,"%s_%04d.tmp",filename,*info);
remove(filename);
sprintf(newfile, "%s_%04d.tmp", filename, *info);
sprintf(oldfile, "%s.bak", filename); // old backup file
if (exists(oldfile)) remove(oldfile); // remove backup file if it already exists
rename (filename, oldfile); // backup our older data instead of deleting it
// このタイミングで落ちると最悪。
if (rename(newfile,filename) != 0) {
if ((ret = rename(newfile,filename)) != 0) { // rename our temporary file to its correct name
sprintf(tmp_output,"%s - '"CL_WHITE"%s"CL_RESET"'\n", strerror(errno), newfile);
ShowError(tmp_output);
}
return ret;
} else {
return 1;
}
return ret;
}