From 43a1c839e4e0c6097aa83ea9bf9216bbb4a1194e Mon Sep 17 00:00:00 2001 From: celest Date: Thu, 31 Mar 2005 10:56:19 +0000 Subject: * Added back up old files in 'save' before saving new data git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/branches/stable@1353 54d463be-8e91-2dee-dedb-b68131a5f0ec --- src/common/lock.c | 32 +++++++++++++++++++------------- 1 file changed, 19 insertions(+), 13 deletions(-) (limited to 'src/common') diff --git a/src/common/lock.c b/src/common/lock.c index 341903434..288093c68 100644 --- a/src/common/lock.c +++ b/src/common/lock.c @@ -2,42 +2,48 @@ #include #include #include +#include #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; } -- cgit v1.2.3-70-g09d2