From Bugzilla Helper: User-Agent: Mozilla/4.72 [de] (X11; I; Linux 2.2.14 i586) Description of problem: The following code don't work: fp = fopen("file", "r+"); fseek(fp,20L,SEEK_END); pos = ftell(fp); printf("Positionned at %d\n",pos); fwrite(data, 100, 1 fp); pos = ftell(fp); printf("Positionned at %d\n",pos); fclose(fp); The data pointed by data are written at offset 0. Ftell() report that all is OK. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. see above 2. 3. Actual Results: Positionned at 20 Positionned at 120 In fact the data was written at offset 0! Expected Results: proper work Additional info:
You haven't specified how big file initially is. If I create it empty (ie. touch file before running the prog), I certainly cannot reproduce this, the data is written at offset 20 till offset 120.
No reply in almost nine months. We cannot reproduce a problem. Closing the bug now.