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authorDenis Vlasenko2008-02-15 16:20:26 +0000
committerDenis Vlasenko2008-02-15 16:20:26 +0000
commitcd5c61cd3b9bcca6afd30d6117d2d2e1791a7375 (patch)
treed7612acbb990d4ae11d36ea002f4b8900adf1658 /networking
parent753f42ab8d50f92e36d3b06a2a47630bed69f257 (diff)
downloadbusybox-cd5c61cd3b9bcca6afd30d6117d2d2e1791a7375.zip
busybox-cd5c61cd3b9bcca6afd30d6117d2d2e1791a7375.tar.gz
ifupdown: code shrink
function old new delta next_word 78 63 -15 ifupdown_main 2381 2170 -211 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-226) Total: -226 bytes
Diffstat (limited to 'networking')
-rw-r--r--networking/ifupdown.c146
1 files changed, 51 insertions, 95 deletions
diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 68ea01a..a794bf7 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -584,32 +584,24 @@ static const struct address_family_t addr_inet = {
static char *next_word(char **buf)
{
- unsigned short length;
+ unsigned length;
char *word;
- if (!buf || !*buf || !**buf) {
- return NULL;
- }
-
/* Skip over leading whitespace */
word = skip_whitespace(*buf);
- /* Skip over comments */
- if (*word == '#') {
+ /* Stop on EOL/comments */
+ if (*word == '#' || *word == '\0')
return NULL;
- }
- /* Find the length of this word */
+ /* Find the length of this word (can't be 0) */
length = strcspn(word, " \t\n");
- if (length == 0) {
- return NULL;
- }
+
+ /* Unless we are already at NUL, store NUL and advance */
+ if (word[length] != '\0')
+ word[length++] = '\0';
+
*buf = word + length;
- /*DBU:[dave@cray.com] if we are already at EOL dont't increment beyond it */
- if (**buf) {
- **buf = '\0';
- (*buf)++;
- }
return word;
}
@@ -686,27 +678,26 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
if (strcmp(firstword, "mapping") == 0) {
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
- currmap = xzalloc(sizeof(struct mapping_defn_t));
+ currmap = xzalloc(sizeof(*currmap));
while ((firstword = next_word(&buf_ptr)) != NULL) {
- if (currmap->max_matches == currmap->n_matches) {
+ if (currmap->n_matches >= currmap->max_matches) {
currmap->max_matches = currmap->max_matches * 2 + 1;
- currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
+ currmap->match = xrealloc(currmap->match, sizeof(*currmap->match) * currmap->max_matches);
}
-
currmap->match[currmap->n_matches++] = xstrdup(firstword);
}
- currmap->max_mappings = 0;
- currmap->n_mappings = 0;
- currmap->mapping = NULL;
- currmap->script = NULL;
+ /*currmap->max_mappings = 0; - done by xzalloc */
+ /*currmap->n_mappings = 0;*/
+ /*currmap->mapping = NULL;*/
+ /*currmap->script = NULL;*/
{
struct mapping_defn_t **where = &defn->mappings;
while (*where != NULL) {
where = &(*where)->next;
}
*where = currmap;
- currmap->next = NULL;
+ /*currmap->next = NULL;*/
}
debug_noise("Added mapping\n");
#endif
@@ -727,44 +718,36 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
char *method_name;
llist_t *iface_list;
- currif = xzalloc(sizeof(struct interface_defn_t));
+ currif = xzalloc(sizeof(*currif));
iface_name = next_word(&buf_ptr);
address_family_name = next_word(&buf_ptr);
method_name = next_word(&buf_ptr);
- if (buf_ptr == NULL) {
- bb_error_msg("too few parameters for line \"%s\"", buf);
- return NULL;
- }
+ if (method_name == NULL)
+ bb_error_msg_and_die("too few parameters for line \"%s\"", buf);
/* ship any trailing whitespace */
buf_ptr = skip_whitespace(buf_ptr);
- if (buf_ptr[0] != '\0') {
- bb_error_msg("too many parameters \"%s\"", buf);
- return NULL;
- }
+ if (buf_ptr[0] != '\0' /* && buf_ptr[0] != '#' */)
+ bb_error_msg_and_die("too many parameters \"%s\"", buf);
currif->iface = xstrdup(iface_name);
currif->address_family = get_address_family(addr_fams, address_family_name);
- if (!currif->address_family) {
- bb_error_msg("unknown address type \"%s\"", address_family_name);
- return NULL;
- }
+ if (!currif->address_family)
+ bb_error_msg_and_die("unknown address type \"%s\"", address_family_name);
currif->method = get_method(currif->address_family, method_name);
- if (!currif->method) {
- bb_error_msg("unknown method \"%s\"", method_name);
- return NULL;
- }
+ if (!currif->method)
+ bb_error_msg_and_die("unknown method \"%s\"", method_name);
for (iface_list = defn->ifaces; iface_list; iface_list = iface_list->link) {
struct interface_defn_t *tmp = (struct interface_defn_t *) iface_list->data;
- if ((strcmp(tmp->iface, currif->iface) == 0) &&
- (tmp->address_family == currif->address_family)) {
- bb_error_msg("duplicate interface \"%s\"", tmp->iface);
- return NULL;
+ if ((strcmp(tmp->iface, currif->iface) == 0)
+ && (tmp->address_family == currif->address_family)
+ ) {
+ bb_error_msg_and_die("duplicate interface \"%s\"", tmp->iface);
}
}
llist_add_to_end(&(defn->ifaces), (char*)currif);
@@ -787,73 +770,50 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
} else {
switch (currently_processing) {
case IFACE:
- {
+ if (buf_ptr[0] == '\0')
+ bb_error_msg_and_die("option with empty value \"%s\"", buf);
+
+ if (strcmp(firstword, "up") != 0
+ && strcmp(firstword, "down") != 0
+ && strcmp(firstword, "pre-up") != 0
+ && strcmp(firstword, "post-down") != 0
+ ) {
int i;
-
- if (strlen(buf_ptr) == 0) {
- bb_error_msg("option with empty value \"%s\"", buf);
- return NULL;
- }
-
- if (strcmp(firstword, "up") != 0
- && strcmp(firstword, "down") != 0
- && strcmp(firstword, "pre-up") != 0
- && strcmp(firstword, "post-down") != 0) {
- for (i = 0; i < currif->n_options; i++) {
- if (strcmp(currif->option[i].name, firstword) == 0) {
- bb_error_msg("duplicate option \"%s\"", buf);
- return NULL;
- }
- }
+ for (i = 0; i < currif->n_options; i++) {
+ if (strcmp(currif->option[i].name, firstword) == 0)
+ bb_error_msg_and_die("duplicate option \"%s\"", buf);
}
}
if (currif->n_options >= currif->max_options) {
- struct variable_t *opt;
-
- currif->max_options = currif->max_options + 10;
- opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
- currif->option = opt;
+ currif->max_options += 10;
+ currif->option = xrealloc(currif->option, sizeof(*currif->option) * currif->max_options);
}
+ debug_noise("\t%s=%s\n", firstword, buf_ptr);
currif->option[currif->n_options].name = xstrdup(firstword);
currif->option[currif->n_options].value = xstrdup(buf_ptr);
- if (!currif->option[currif->n_options].name) {
- perror(filename);
- return NULL;
- }
- if (!currif->option[currif->n_options].value) {
- perror(filename);
- return NULL;
- }
- debug_noise("\t%s=%s\n", currif->option[currif->n_options].name,
- currif->option[currif->n_options].value);
currif->n_options++;
break;
case MAPPING:
#if ENABLE_FEATURE_IFUPDOWN_MAPPING
if (strcmp(firstword, "script") == 0) {
- if (currmap->script != NULL) {
- bb_error_msg("duplicate script in mapping \"%s\"", buf);
- return NULL;
- } else {
- currmap->script = xstrdup(next_word(&buf_ptr));
- }
+ if (currmap->script != NULL)
+ bb_error_msg_and_die("duplicate script in mapping \"%s\"", buf);
+ currmap->script = xstrdup(next_word(&buf_ptr));
} else if (strcmp(firstword, "map") == 0) {
- if (currmap->max_mappings == currmap->n_mappings) {
+ if (currmap->n_mappings >= currmap->max_mappings) {
currmap->max_mappings = currmap->max_mappings * 2 + 1;
currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
}
currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&buf_ptr));
currmap->n_mappings++;
} else {
- bb_error_msg("misplaced option \"%s\"", buf);
- return NULL;
+ bb_error_msg_and_die("misplaced option \"%s\"", buf);
}
#endif
break;
case NONE:
default:
- bb_error_msg("misplaced option \"%s\"", buf);
- return NULL;
+ bb_error_msg_and_die("misplaced option \"%s\"", buf);
}
}
free(buf);
@@ -1138,7 +1098,7 @@ static llist_t *read_iface_state(void)
int ifupdown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ifupdown_main(int argc, char **argv)
{
- int (*cmds)(struct interface_defn_t *) = NULL;
+ int (*cmds)(struct interface_defn_t *);
struct interfaces_file_t *defn;
llist_t *target_list = NULL;
const char *interfaces = "/etc/network/interfaces";
@@ -1161,10 +1121,6 @@ int ifupdown_main(int argc, char **argv)
defn = read_interfaces(interfaces);
debug_noise("\ndone reading %s\n\n", interfaces);
- if (!defn) {
- return EXIT_FAILURE;
- }
-
startup_PATH = getenv("PATH");
if (!startup_PATH) startup_PATH = "";