At 21:24 03.01.00 +0100, Olaf Kirch wrote: >Hi all, Hallo Olaf, >when you're dealing with files in /tmp that are supposed to be re-opened >(rather than opened once and then discarded) there's an established >way to do it which goes like this: > > if (lstat(fname, &stb1) >= 0 && S_ISREG(stb1.st_mode)) { > fd = open(fname, O_RDWR); > if (fd < 0 || fstat(fd, &stb2) < 0 > || ino_or_dev_mismatch(&stb1, &stb2)) > raise_big_stink() > } else { > /* do the O_EXCL thing */ > } I did something that way: FILE *DoOpen(const char *cpFile, long bAppend) { FILE *spNew; FILE *spTest; struct stat sStat; spTest = fopen(cpFile,"a"); if (!spTest) { Log("ERR FILE OPEN",cpFile); return NULL; } if (lstat(cpFile,&sStat)) { Log("ERR STAT",cpFile); return NULL; } if ((sStat.st_mode & S_IFMT) == S_IFLNK) { fclose(spTest); Log("ERR ISLINK",cpFile); return NULL; } if (bAppend) spNew = spTest; else { spNew = freopen(cpFile,"w",spTest); fclose(spTest); } if (!spNew) { Log("ERR FILE OPEN",cpFile); return NULL; } return spFile; } Comments ? Improvements ? By Goetz -- Goetz Babin-Ebell, TC TrustCenter GmbH, http://www.trustcenter.de Sonninstr. 24-28, 20097 Hamburg, Germany Tel.: +49-(0)40 80 80 26 -0, Fax: +49-(0)40 80 80 26 -126
This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 15:25:44 PDT