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pellepl avatar pellepl commented on May 24, 2024

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4embedded avatar 4embedded commented on May 24, 2024

Flushing didn't help. It looks to me like SPIFFS_Tell() already flushes before getting the offset:

s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh) {
  SPIFFS_API_DBG("%s "_SPIPRIfd "\n", __func__, fh);
  s32_t res;
  SPIFFS_API_CHECK_CFG(fs);
  SPIFFS_API_CHECK_MOUNT(fs);
  SPIFFS_LOCK(fs);

  fh = SPIFFS_FH_UNOFFS(fs, fh);

  spiffs_fd *fd;
  res = spiffs_fd_get(fs, fh, &fd);
  SPIFFS_API_CHECK_RES_UNLOCK(fs, res);

#if SPIFFS_CACHE_WR
  res = spiffs_fflush_cache(fs, fh);
  SPIFFS_API_CHECK_RES_UNLOCK(fs, res);
#endif

  res = fd->fdoffset;
//  res = fd->offset;  <<-- this seems to work

  SPIFFS_UNLOCK(fs);
  return res;
}

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pellepl avatar pellepl commented on May 24, 2024

Yep you're right. You spotted a bug actually - well done! When writing twice/more without flushing in between having O_APPEND the fdoffset gets confused. Using offset only won't work either, as cached stuff may be lingering.
Got a fix for it, will push this evening.

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4embedded avatar 4embedded commented on May 24, 2024

Thanks @pellepl ! Works great.

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