Log *logfopen(char *name, FILE * fp)
{
Log *l;
if (!fp) {
if (!(l = lookup_logfile(name)))
return NULL;
l->opencount++;
return l;
}
if (!(l = malloc(sizeof(Log))))
return NULL;
if (!(l->st = malloc(sizeof(struct stat)))) {
free((char *)l);
return NULL;
}
if (!(l->name = SaveStr(name))) {
free((char *)l->st);
free((char *)l);
return NULL;
}
l->fp = fp;
l->opencount = 1;
l->writecount = 0;
l->flushcount = 0;
changed_logfile(l);
l->next = logroot;
logroot = l;
return l;
}
int logfflush(Log *l)
{
int r = 0;
if (!l)
for (l = logroot; l; l = l->next) {
if (stolen_logfile(l) && logfile_reopen(l->name, fileno(l->fp), l))
return -1;
r |= fflush(l->fp);
l->flushcount++;
changed_logfile(l);
} else {
if (stolen_logfile(l) && logfile_reopen(l->name, fileno(l->fp), l))
return -1;
r = fflush(l->fp);
l->flushcount++;
changed_logfile(l);
}
return r;
}
/*
* XXX
* write and flush both *should* check the file's stat, if it disappeared
* or changed, re-open it.
*/
int logfwrite(Log *l, char *buf, size_t n)
{
int r;
if (stolen_logfile(l) && logfile_reopen(l->name, fileno(l->fp), l))
return -1;
r = fwrite(buf, n, 1, l->fp);
l->writecount += l->flushcount + 1;
l->flushcount = 0;
changed_logfile(l);
return r;
}
static int logfile_reopen(char *name, int wantfd, Log *l)
{
int got_fd;
close(wantfd);
if (((got_fd = open(name, O_WRONLY | O_CREAT | O_APPEND, 0666)) < 0) || lf_move_fd(got_fd, wantfd) < 0) {
logfclose(l);
return -1;
}
changed_logfile(l);
l->st->st_ino = l->st->st_dev = 0;
return 0;
}
static int logfile_reopen(char *name, int wantfd, struct logfile *l)
{
int got_fd;
close(wantfd);
if (((got_fd = open(name, O_WRONLY | O_CREAT | O_APPEND, 0666)) < 0) || lf_move_fd(got_fd, wantfd) < 0) {
logfclose(l);
debug("logfile_reopen: failed for %s\n", name);
return -1;
}
changed_logfile(l);
l->st->st_ino = l->st->st_dev = 0;
debug("logfile_reopen: %d = %s\n", wantfd, name);
return 0;
}