Check return value of fseek for errors.
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@ -475,7 +475,11 @@ static int callback_http(struct libwebsocket_context *context,
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}
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wlen = libwebsocket_write(wsi, buf, buflen, LWS_WRITE_HTTP);
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if(wlen < buflen){
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fseek(u->fptr, buflen-wlen, SEEK_CUR);
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if(fseek(u->fptr, buflen-wlen, SEEK_CUR) < 0){
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fclose(u->fptr);
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u->fptr = NULL;
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return -1;
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}
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}else{
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if(buflen < sizeof(buf)){
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fclose(u->fptr);
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