file_io/unix/seek.c

19 static apr_status_t setptr(apr_file_t *thefile, apr_off_t pos )
24     if (thefile->direction == 1) {
25         rv = apr_file_flush_locked(thefile);
29         thefile->bufpos = thefile->direction = thefile->dataRead = 0;
32     newbufpos = pos - (thefile->filePtr - thefile->dataRead);
33     if (newbufpos >= 0 && newbufpos <= thefile->dataRead) {
34         thefile->bufpos = newbufpos;
38         if (lseek(thefile->filedes, pos, SEEK_SET) != -1) {
39             thefile->bufpos = thefile->dataRead = 0;
40             thefile->filePtr = pos;
52 APR_DECLARE(apr_status_t) apr_file_seek(apr_file_t *thefile, apr_seek_where_t where, apr_off_t *offset)
56     thefile->eof_hit = 0;
58     if (thefile->buffered) {
62         file_lock(thefile);
66             rc = setptr(thefile, *offset);
70             rc = setptr(thefile, thefile->filePtr - thefile->dataRead + thefile->bufpos + *offset);
74             rc = apr_file_info_get_locked(&finfo, APR_FINFO_SIZE, thefile);
76                 rc = setptr(thefile, finfo.size + *offset);
80         *offset = thefile->filePtr - thefile->dataRead + thefile->bufpos;
82         file_unlock(thefile);
87         rv = lseek(thefile->filedes, *offset, where);