2  * ntp_ppsdev.c - PPS-device support
6  * ---------------------------------------------------------------------
19  * ---------------------------------------------------------------------
40 /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
43 /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
67 /* ------------------------------------------------------------------ */
79 	if (NULL != pxdir->dir)  in xdirClose()
80 		closedir(pxdir->dir); /* closes the internal FD, too! */  in xdirClose()
81 	else if (-1 != pxdir->dfd)  in xdirClose()
82 		close(pxdir->dfd);    /* otherwise _we_ have to do it */  in xdirClose()
83 	pxdir->dfd = -1;  in xdirClose()
84 	pxdir->dir = NULL;  in xdirClose()
95 	 * it's ok to keep the value around -- even if we should do  in xdirOpenAt()
99 	pxdir->dir = NULL;  in xdirOpenAt()
100 	if (-1 == (pxdir->dfd = openat(fdo, path, OModeD)))  in xdirOpenAt()
102 	if (NULL == (pxdir->dir = fdopendir(pxdir->dfd)))  in xdirOpenAt()
111 /* --------------------------------------------------------------------
116  * of 4096 bytes when you 'stat' them -- but reading gives EOF after a
130 	if (-1 == (dfd = openat(rfd, path, OModeF)) || -1 == fstat(dfd, &sb))  in readFileAt()
138 	while (rdlen > 0 && ret[rdlen - 1] <= ' ')  in readFileAt()
139 		--rdlen;  in readFileAt()
145 	if (-1 != dfd)  in readFileAt()
150 /* --------------------------------------------------------------------
167 		if (-1 == fstatat(xdir.dfd, dent->d_name,  in findDevByDevId()
173 			if (-1 == asprintf(&name, "/dev/%s", dent->d_name))  in findDevByDevId()
183 /* --------------------------------------------------------------------
197 	if (-1 != fstat(fd, psb)) {  in getCharDevId()
198 		rc = S_ISCHR(psb->st_mode);  in getCharDevId()
200 			*out = psb->st_rdev;  in getCharDevId()
207 /* --------------------------------------------------------------------
208  * given the dir-fd of a pps instance dir in the linux sysfs tree, get
227 	if ((-1 == stat(bufp, &sb)) || !S_ISCHR(sb.st_mode))  in getPpsTuple()
252 /* --------------------------------------------------------------------
256  * ouput parameter to the PPS dev id and return true...
277 		if (strncmp("pps", dent->d_name, 3))  in findPpsDevId()
279 		fdDevDir = openat(ClassDir.dfd, dent->d_name, OModeD);  in findPpsDevId()
280 		if (-1 == fdDevDir)  in findPpsDevId()
299 /* --------------------------------------------------------------------
328 	/* 'magic' PPS support -- try to instantiate missing PPS devices  in findMatchingPpsDev()
329 	 * on-the-fly.  Our mileage may vary -- running as root at that  in findMatchingPpsDev()
337 	if ((0 != geteuid()) || (-1 == ioctl(fdtty, TIOCSETD, &ldisc)))  in findMatchingPpsDev()
339 	msyslog(LOG_INFO, "auto-instantiated PPS device for device %u:%u",  in findMatchingPpsDev()
355 	if (-1 == (fdpps = open(dpath, OModeF))) {  in findMatchingPpsDev()
356 		msyslog(LOG_ERR, "could not open auto-created '%s': %m", dpath);  in findMatchingPpsDev()
359 	if (-1 == fchmod(fdpps, sb.st_mode)) {  in findMatchingPpsDev()
360 		msyslog(LOG_ERR, "could not chmod auto-created '%s': %m", dpath);  in findMatchingPpsDev()
362 	if (-1 == fchown(fdpps, sb.st_uid, sb.st_gid)) {  in findMatchingPpsDev()
363 		msyslog(LOG_ERR, "could not chown auto-created '%s': %m", dpath);  in findMatchingPpsDev()
375 /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
377 /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */
384 	int         ttyfd  , /* current tty FD, or -1 */  in ppsdev_reopen()
385 	int         ppsfd  , /* current pps FD, or -1 */  in ppsdev_reopen()
390 	int retfd = -1;  in ppsdev_reopen()
404 	if (-1 == retfd) {	  in ppsdev_reopen()
408 				ppspath, (retfd != -1 ? "succeeded" : "failed"));  in ppsdev_reopen()
414 	if ((-1 == retfd) && (-1 != ttyfd)) {	  in ppsdev_reopen()
419 				xpath, (retfd != -1 ? "succeeded" : "failed"));  in ppsdev_reopen()
431 	if (-1 == retfd)  in ppsdev_reopen()
433 	if (-1 == retfd)  in ppsdev_reopen()
436 	/* Close the old pps FD, but only if the new pps FD is neither  in ppsdev_reopen()
447 	int ttyfd, /* current tty FD, or -1 */  in ppsdev_close()
448 	int ppsfd) /* current pps FD, or -1 */  in ppsdev_close()
451 	 * channel only if it's valid and _NOT_ the tty itself:  in ppsdev_close()
453 	if ((-1 != ppsfd) && (ttyfd != ppsfd))  in ppsdev_close()
456 /* --*-- that's all folks --*-- */