[LinuxPPS] [PATCH] time_pps_findpath()

[Rodolfo Giometti]

On Mon, Jun 19, 2006 at 10:25:35PM +0200, Rodolfo Giometti wrote:
> 
>   +#ifdef PPS_HAVE_FINDPATH
>   +      /* Get the PPS source's real name */
>   +      fd = readlink(link, path, STRING_LEN-1);
>   +      if (fd <= 0) {
>   +              msyslog(LOG_ERR, "refclock: PPS source \"%s\" is not a valid link", PPS_DEVI\CE);
>   +              return (1);
>   +      }
>   +      path[fd] = '\0';
>   +
>   +      /* Try to find the source */
>   +      fd = time_pps_findpath(path, STRING_LEN, id, STRING_LEN);
>   +      if (fd < 0) {
>   +              msyslog(LOG_ERR, "refclock: cannot find PPS source \"%s\" in the system", PPS_DEVICE);
>   +              return (1);
>   +      }
>   +      msyslog(LOG_INFO, "refclock: found PPS source \"%s\" at id #%d on \"%s\"", PPS_DEVICE, fd, id);
>   +#endif   /* PPS_HAVE_FINDPATH */
>   +
>   +
>          if (time_pps_create(fd, &pps_handle) < 0) {
>   -              pps_handle = 0;
>                  msyslog(LOG_ERR,
>                          "refclock: time_pps_create failed: %m");
>          }

Smarter programs may also test the link and returns the link itself in
case of error, so the user may address a specific filename also.

	fd = readlink(link, path, STRING_LEN-1);
	if (fd <= 0)
		strncpy(path, link, STRING_LEN);
	else
		path[fd] = '\0';

In this manner the user may refere directly to device
"/dev/ttyS0"... this evening I'll do some tests about it.

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: Digital signature
Url : http://ml.enneenne.com/pipermail/linuxpps/attachments/20060620/df405782/attachment.pgp