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authorGlenn L McGrath2003-01-16 11:37:57 +0000
committerGlenn L McGrath2003-01-16 11:37:57 +0000
commit77c60e5c667e1293f92b65056f107c92edcc3965 (patch)
treed4eadc7c5981c0da97e5d44bfaf777373316af1d /networking/nameif.c
parent8573704097440769c232f3edb6f347f016353dfb (diff)
downloadbusybox-77c60e5c667e1293f92b65056f107c92edcc3965.zip
busybox-77c60e5c667e1293f92b65056f107c92edcc3965.tar.gz
Use vsyslog instead of syslog, improve initalisation and cleanup of
variables, save 300 Bytes or so, patch by Vladimir N. Oleynik
Diffstat (limited to 'networking/nameif.c')
-rw-r--r--networking/nameif.c78
1 files changed, 36 insertions, 42 deletions
diff --git a/networking/nameif.c b/networking/nameif.c
index 886ff49..cd18b4c 100644
--- a/networking/nameif.c
+++ b/networking/nameif.c
@@ -1,4 +1,4 @@
-/*
+/*
* nameif.c - Naming Interfaces based on MAC address for busybox.
*
* Writen 2000 by Andi Kleen.
@@ -38,7 +38,7 @@
/* take from linux/sockios.h */
#define SIOCSIFNAME 0x8923 /* set interface name */
-/* Octets in one ethernet addr, from <linux/if_ether.h> */
+/* Octets in one ethernet addr, from <linux/if_ether.h> */
#define ETH_ALEN 6
#ifndef ifr_newname
@@ -52,18 +52,22 @@ typedef struct mactable_s {
struct ether_addr *mac;
} mactable_t;
-static void serror(const char use_syslog, const char *s, ...)
+static unsigned char use_syslog;
+
+static void serror(const char *s, ...) __attribute__ ((noreturn));
+
+static void serror(const char *s, ...)
{
va_list ap;
va_start(ap, s);
if (use_syslog) {
- openlog("nameif", 0, LOG_LOCAL0);
- syslog(LOG_ERR, s, ap);
+ openlog(applet_name, 0, LOG_LOCAL0);
+ vsyslog(LOG_ERR, s, ap);
closelog();
} else {
- vfprintf(stderr, s, ap);
+ verror_msg(s, ap);
putc('\n', stderr);
}
@@ -73,14 +77,14 @@ static void serror(const char use_syslog, const char *s, ...)
}
/* Check ascii str_macaddr, convert and copy to *mac */
-struct ether_addr *cc_macaddr(char *str_macaddr, unsigned char use_syslog)
+struct ether_addr *cc_macaddr(char *str_macaddr)
{
struct ether_addr *lmac, *mac;
lmac = ether_aton(str_macaddr);
if (lmac == NULL)
- serror(use_syslog, "cannot parse MAC %s", str_macaddr);
- mac = xcalloc(1, ETH_ALEN);
+ serror("cannot parse MAC %s", str_macaddr);
+ mac = xmalloc(ETH_ALEN);
memcpy(mac, lmac, ETH_ALEN);
return mac;
@@ -90,13 +94,12 @@ int nameif_main(int argc, char **argv)
{
mactable_t *clist = NULL;
FILE *ifh;
- char *fname = "/etc/mactab";
+ const char *fname = "/etc/mactab";
char *line;
- unsigned char use_syslog = 0;
- int ctl_sk = -1;
+ int ctl_sk;
int opt;
int if_index = 1;
- mactable_t *ch = NULL;
+ mactable_t *ch;
static struct option opts[] = {
{"syslog", 0, NULL, 's'},
@@ -121,23 +124,18 @@ int nameif_main(int argc, char **argv)
show_usage();
if (optind < argc) {
- while (optind < argc) {
+ char **a = argv + optind;
- if (strlen(argv[optind]) > IF_NAMESIZE)
- serror(use_syslog, "interface name `%s' too long",
- argv[optind]);
- optind++;
+ while (*a) {
+ if (strlen(*a) > IF_NAMESIZE)
+ serror("interface name `%s' too long", *a);
ch = xcalloc(1, sizeof(mactable_t));
- ch->next = NULL;
- ch->prev = NULL;
- ch->ifname = strdup(argv[optind - 1]);
- ch->mac = cc_macaddr(argv[optind], use_syslog);
- optind++;
+ ch->ifname = xstrdup(*a++);
+ ch->mac = cc_macaddr(*a++);
if (clist)
- clist->prev = ch->next;
+ clist->prev = ch;
ch->next = clist;
- ch->prev = clist;
clist = ch;
}
} else {
@@ -145,24 +143,22 @@ int nameif_main(int argc, char **argv)
while ((line = get_line_from_file(ifh)) != NULL) {
char *line_ptr;
- unsigned short name_length;
+ size_t name_length;
line_ptr = line + strspn(line, " \t");
if ((line_ptr[0] == '#') || (line_ptr[0] == '\n'))
continue;
name_length = strcspn(line_ptr, " \t");
- if (name_length > IF_NAMESIZE)
- serror(use_syslog, "interface name `%s' too long",
- argv[optind]);
ch = xcalloc(1, sizeof(mactable_t));
- ch->next = NULL;
- ch->prev = NULL;
- ch->ifname = strndup(line_ptr, name_length);
+ ch->ifname = xstrndup(line_ptr, name_length);
+ if (name_length > IF_NAMESIZE)
+ serror("interface name `%s' too long",
+ ch->ifname);
line_ptr += name_length;
line_ptr += strspn(line_ptr, " \t");
name_length = strspn(line_ptr, "0123456789ABCDEFabcdef:");
line_ptr[name_length] = '\0';
- ch->mac = cc_macaddr(line_ptr, use_syslog);
+ ch->mac = cc_macaddr(line_ptr);
if (clist)
clist->prev = ch;
ch->next = clist;
@@ -173,7 +169,7 @@ int nameif_main(int argc, char **argv)
}
if ((ctl_sk = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
- serror(use_syslog, "socket: %s", strerror(errno));
+ serror("socket: %m");
while (clist) {
struct ifreq ifr;
@@ -201,8 +197,8 @@ int nameif_main(int argc, char **argv)
strcpy(ifr.ifr_newname, ch->ifname);
if (ioctl(ctl_sk, SIOCSIFNAME, &ifr) < 0)
- serror(use_syslog, "cannot change ifname %s to %s: %s",
- ifr.ifr_name, ch->ifname, strerror(errno));
+ serror("cannot change ifname %s to %s: %m",
+ ifr.ifr_name, ch->ifname);
/* Remove list entry of renamed interface */
if (ch->prev != NULL) {
@@ -212,13 +208,11 @@ int nameif_main(int argc, char **argv)
}
if (ch->next != NULL)
(ch->next)->prev = ch->prev;
+#ifdef CONFIG_FEATURE_CLEAN_UP
+ free(ch->ifname);
+ free(ch->mac);
free(ch);
- }
-
- while (clist) {
- ch = clist;
- clist = clist->next;
- free(ch);
+#endif
}
return 0;