/** If lf refers to an actual file that we have just opened, and the file
* contains no data, log an "opening new logfile" message at the top.
*
* Return -1 if the log is broken and needs to be deleted, else return 0.
*/
static int
log_tor_version(logfile_t *lf, int reset)
{
char buf[256];
size_t n;
int is_new;
if (!lf->needs_close)
/* If it doesn't get closed, it isn't really a file. */
return 0;
if (lf->is_temporary)
/* If it's temporary, it isn't really a file. */
return 0;
is_new = lf->fd >= 0 && tor_fd_getpos(lf->fd) == 0;
if (reset && !is_new)
/* We are resetting, but we aren't at the start of the file; no
* need to log again. */
return 0;
n = _log_prefix(buf, sizeof(buf), LOG_NOTICE);
if (appname) {
tor_snprintf(buf+n, sizeof(buf)-n,
"%s opening %slog file.\n", appname, is_new?"new ":"");
} else {
tor_snprintf(buf+n, sizeof(buf)-n,
"Tor %s opening %slog file.\n", VERSION, is_new?"new ":"");
}
if (write_all(lf->fd, buf, strlen(buf), 0) < 0) /* error */
return -1; /* failed */
return 0;
}
/** Write the body of <b>md</b> into <b>f</b>, with appropriate annotations.
* On success, return the total number of bytes written, and set
* *<b>annotation_len_out</b> to the number of bytes written as
* annotations. */
static ssize_t
dump_microdescriptor(int fd, microdesc_t *md, size_t *annotation_len_out)
{
ssize_t r = 0;
ssize_t written;
if (md->body == NULL) {
*annotation_len_out = 0;
return 0;
}
/* XXXX drops unknown annotations. */
if (md->last_listed) {
char buf[ISO_TIME_LEN+1];
char annotation[ISO_TIME_LEN+32];
format_iso_time(buf, md->last_listed);
tor_snprintf(annotation, sizeof(annotation), "@last-listed %s\n", buf);
if (write_all_to_fd(fd, annotation, strlen(annotation)) < 0) {
log_warn(LD_DIR,
"Couldn't write microdescriptor annotation: %s",
strerror(errno));
return -1;
}
r += strlen(annotation);
*annotation_len_out = r;
} else {
*annotation_len_out = 0;
}
md->off = tor_fd_getpos(fd);
warn_if_nul_found(md->body, md->bodylen, (int64_t) md->off,
"dumping a microdescriptor");
written = write_all_to_fd(fd, md->body, md->bodylen);
if (written != (ssize_t)md->bodylen) {
written = written < 0 ? 0 : written;
log_warn(LD_DIR,
"Couldn't dump microdescriptor (wrote %ld out of %lu): %s",
(long)written, (unsigned long)md->bodylen,
strerror(errno));
return -1;
}
r += md->bodylen;
return r;
}
