/* Interface structure allocation by proc filesystem. */
int
interface_list_proc ()
{
FILE *fp;
char buf[PROCBUFSIZ];
struct interface *ifp;
char *name;
/* Open /proc/net/dev. */
fp = fopen (_PATH_PROC_NET_DEV, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_DEV, strerror (errno));
return -1;
}
/* Drop header lines. */
fgets (buf, PROCBUFSIZ, fp);
fgets (buf, PROCBUFSIZ, fp);
/* Only allocate interface structure. Other jobs will be done in
if_ioctl.c. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
interface_name_cut (buf, &name);
ifp = if_get_by_name (name);
if_add_update (ifp);
}
return 0;
}
/* Update interface's statistics. */
int
ifstat_update_proc ()
{
FILE *fp;
char buf[PROCBUFSIZ];
int version;
struct interface *ifp;
char *stat;
char *name;
char *retval;
/* Open /proc/net/dev. */
fp = fopen (_PATH_PROC_NET_DEV, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_DEV, strerror (errno));
return -1;
}
/* Drop header lines. */
retval = fgets (buf, PROCBUFSIZ, fp);
retval = fgets (buf, PROCBUFSIZ, fp);
/* To detect proc format veresion, parse second line. */
if (strstr (buf, "compressed"))
version = 3;
else if (strstr (buf, "bytes"))
version = 2;
else
version = 1;
/* Update each interface's statistics. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
stat = interface_name_cut (buf, &name);
ifp = if_get_by_name (name);
ifstat_dev_fields (version, stat, ifp);
}
fclose(fp);
return 0;
}
