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/*
* Copyright (c) 2006 Dell, Inc.
* by Matt Domsch <Matt_Domsch@dell.com>
* Licensed under the GNU General Public license, version 2.
* Copied from from net-tools-1.60, also under the GNU GPL v2,
* and modified for use here.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>
#include "eths.h"
#define _PATH_PROCNET_DEV "/proc/net/dev"
static struct network_device *add_interface(struct libbiosdevname_state *state,
const char *name)
{
struct network_device *i;
i = malloc(sizeof(*i));
if (!i)
return NULL;
memset(i, 0, sizeof(*i));
INIT_LIST_HEAD(&i->node);
snprintf(i->kernel_name, sizeof(i->kernel_name), name);
list_add_tail(&i->node, &state->network_devices);
return i;
}
static char *get_name(char **namep, char *p)
{
int count = 0;
char *name;
while (isspace(*p))
p++;
name = *namep = p;
while (*p) {
if (isspace(*p))
break;
if (*p == ':') { /* could be an alias */
char *dot = p, *dotname = name;
*name++ = *p++;
count++;
while (isdigit(*p)){
*name++ = *p++;
count++;
if (count == (IFNAMSIZ-1))
break;
}
if (*p != ':') { /* it wasn't, backup */
p = dot;
name = dotname;
}
if (*p == '\0')
return NULL;
p++;
break;
}
*name++ = *p++;
count++;
if (count == (IFNAMSIZ-1))
break;
}
*name++ = '\0';
return p;
}
int get_interfaces(struct libbiosdevname_state *state)
{
FILE *fh;
int err;
char *line = NULL;
size_t linelen = 0;
fh = fopen(_PATH_PROCNET_DEV, "r");
if (!fh) {
fprintf(stderr, "Error: cannot open %s (%s).\n",
_PATH_PROCNET_DEV, strerror(errno));
return 1;
}
if (getline(&line, &linelen, fh) == -1 /* eat line */
|| getline(&line, &linelen, fh) == -1) {
err = -1;
goto out;
}
err = 0;
while (getline(&line, &linelen, fh) != -1) {
char *s, *name;
s = get_name(&name, line);
add_interface(state, name);
}
if (ferror(fh)) {
perror(_PATH_PROCNET_DEV);
err = -1;
}
out:
free(line);
fclose(fh);
return err;
}
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