log_output
if (!log_output && f)
log_output = f;
return log_output;
if (log_output) {
if (fwrite(nbuf, strlen(nbuf), 1, log_output) == 0) {
fprintf(log_output, fallback_msg, errno);
if (fileno(log_output) != -1 &&
fileno(stdout) == fileno(log_output))
fclose(log_output);
static FILE *log_output;
log_output = stderr;
log_output(logbuf);
log_output(logbuf);