/*
* Requires fd to be open and need_fd to be closed.
* If possible, need_fd will be open afterwards and refer to
* the object originally reffered by fd. fd will be closed then.
* Works just like ``fcntl(fd, DUPFD, need_fd); close(fd);''
*
* need_fd is returned on success, else -1 is returned.
*/
int lf_move_fd(int fd, int need_fd)
{
int r = -1;
if (fd == need_fd)
return fd;
if (fd >= 0 && fd < need_fd)
r = lf_move_fd(dup(fd), need_fd);
close(fd);
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;
}
