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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
This commit is contained in:
Denis Vlasenko
parent
753f42ab8d
commit
cd5c61cd3b
@ -584,32 +584,24 @@ static const struct address_family_t addr_inet = {
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static char *next_word(char **buf)
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{
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unsigned short length;
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unsigned length;
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char *word;
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if (!buf || !*buf || !**buf) {
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return NULL;
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}
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/* Skip over leading whitespace */
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word = skip_whitespace(*buf);
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/* Skip over comments */
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if (*word == '#') {
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/* Stop on EOL/comments */
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if (*word == '#' || *word == '\0')
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return NULL;
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}
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/* Find the length of this word */
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/* Find the length of this word (can't be 0) */
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length = strcspn(word, " \t\n");
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if (length == 0) {
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return NULL;
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}
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/* Unless we are already at NUL, store NUL and advance */
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if (word[length] != '\0')
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word[length++] = '\0';
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*buf = word + length;
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/*DBU:[dave@cray.com] if we are already at EOL dont't increment beyond it */
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if (**buf) {
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**buf = '\0';
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(*buf)++;
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}
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return word;
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}
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@ -686,27 +678,26 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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if (strcmp(firstword, "mapping") == 0) {
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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currmap = xzalloc(sizeof(struct mapping_defn_t));
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currmap = xzalloc(sizeof(*currmap));
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while ((firstword = next_word(&buf_ptr)) != NULL) {
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if (currmap->max_matches == currmap->n_matches) {
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if (currmap->n_matches >= currmap->max_matches) {
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currmap->max_matches = currmap->max_matches * 2 + 1;
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currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
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currmap->match = xrealloc(currmap->match, sizeof(*currmap->match) * currmap->max_matches);
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}
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currmap->match[currmap->n_matches++] = xstrdup(firstword);
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}
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currmap->max_mappings = 0;
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currmap->n_mappings = 0;
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currmap->mapping = NULL;
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currmap->script = NULL;
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/*currmap->max_mappings = 0; - done by xzalloc */
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/*currmap->n_mappings = 0;*/
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/*currmap->mapping = NULL;*/
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/*currmap->script = NULL;*/
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{
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struct mapping_defn_t **where = &defn->mappings;
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while (*where != NULL) {
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where = &(*where)->next;
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}
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*where = currmap;
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currmap->next = NULL;
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/*currmap->next = NULL;*/
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}
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debug_noise("Added mapping\n");
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#endif
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@ -727,44 +718,36 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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char *method_name;
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llist_t *iface_list;
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currif = xzalloc(sizeof(struct interface_defn_t));
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currif = xzalloc(sizeof(*currif));
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iface_name = next_word(&buf_ptr);
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address_family_name = next_word(&buf_ptr);
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method_name = next_word(&buf_ptr);
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if (buf_ptr == NULL) {
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bb_error_msg("too few parameters for line \"%s\"", buf);
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return NULL;
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}
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if (method_name == NULL)
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bb_error_msg_and_die("too few parameters for line \"%s\"", buf);
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/* ship any trailing whitespace */
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buf_ptr = skip_whitespace(buf_ptr);
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if (buf_ptr[0] != '\0') {
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bb_error_msg("too many parameters \"%s\"", buf);
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return NULL;
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}
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if (buf_ptr[0] != '\0' /* && buf_ptr[0] != '#' */)
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bb_error_msg_and_die("too many parameters \"%s\"", buf);
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currif->iface = xstrdup(iface_name);
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currif->address_family = get_address_family(addr_fams, address_family_name);
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if (!currif->address_family) {
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bb_error_msg("unknown address type \"%s\"", address_family_name);
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return NULL;
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}
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if (!currif->address_family)
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bb_error_msg_and_die("unknown address type \"%s\"", address_family_name);
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currif->method = get_method(currif->address_family, method_name);
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if (!currif->method) {
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bb_error_msg("unknown method \"%s\"", method_name);
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return NULL;
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}
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if (!currif->method)
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bb_error_msg_and_die("unknown method \"%s\"", method_name);
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for (iface_list = defn->ifaces; iface_list; iface_list = iface_list->link) {
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struct interface_defn_t *tmp = (struct interface_defn_t *) iface_list->data;
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if ((strcmp(tmp->iface, currif->iface) == 0) &&
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(tmp->address_family == currif->address_family)) {
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bb_error_msg("duplicate interface \"%s\"", tmp->iface);
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return NULL;
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if ((strcmp(tmp->iface, currif->iface) == 0)
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&& (tmp->address_family == currif->address_family)
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) {
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bb_error_msg_and_die("duplicate interface \"%s\"", tmp->iface);
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}
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}
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llist_add_to_end(&(defn->ifaces), (char*)currif);
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@ -787,73 +770,50 @@ static struct interfaces_file_t *read_interfaces(const char *filename)
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} else {
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switch (currently_processing) {
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case IFACE:
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{
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int i;
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if (strlen(buf_ptr) == 0) {
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bb_error_msg("option with empty value \"%s\"", buf);
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return NULL;
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}
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if (buf_ptr[0] == '\0')
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bb_error_msg_and_die("option with empty value \"%s\"", buf);
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if (strcmp(firstword, "up") != 0
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&& strcmp(firstword, "down") != 0
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&& strcmp(firstword, "pre-up") != 0
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&& strcmp(firstword, "post-down") != 0) {
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&& strcmp(firstword, "post-down") != 0
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) {
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int i;
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for (i = 0; i < currif->n_options; i++) {
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if (strcmp(currif->option[i].name, firstword) == 0) {
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bb_error_msg("duplicate option \"%s\"", buf);
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return NULL;
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}
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}
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if (strcmp(currif->option[i].name, firstword) == 0)
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bb_error_msg_and_die("duplicate option \"%s\"", buf);
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}
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}
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if (currif->n_options >= currif->max_options) {
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struct variable_t *opt;
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currif->max_options = currif->max_options + 10;
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opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
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currif->option = opt;
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currif->max_options += 10;
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currif->option = xrealloc(currif->option, sizeof(*currif->option) * currif->max_options);
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}
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debug_noise("\t%s=%s\n", firstword, buf_ptr);
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currif->option[currif->n_options].name = xstrdup(firstword);
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currif->option[currif->n_options].value = xstrdup(buf_ptr);
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if (!currif->option[currif->n_options].name) {
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perror(filename);
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return NULL;
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}
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if (!currif->option[currif->n_options].value) {
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perror(filename);
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return NULL;
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}
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debug_noise("\t%s=%s\n", currif->option[currif->n_options].name,
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currif->option[currif->n_options].value);
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currif->n_options++;
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break;
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case MAPPING:
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#if ENABLE_FEATURE_IFUPDOWN_MAPPING
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if (strcmp(firstword, "script") == 0) {
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if (currmap->script != NULL) {
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bb_error_msg("duplicate script in mapping \"%s\"", buf);
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return NULL;
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} else {
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if (currmap->script != NULL)
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bb_error_msg_and_die("duplicate script in mapping \"%s\"", buf);
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currmap->script = xstrdup(next_word(&buf_ptr));
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}
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} else if (strcmp(firstword, "map") == 0) {
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if (currmap->max_mappings == currmap->n_mappings) {
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if (currmap->n_mappings >= currmap->max_mappings) {
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currmap->max_mappings = currmap->max_mappings * 2 + 1;
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currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
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}
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currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&buf_ptr));
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currmap->n_mappings++;
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} else {
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bb_error_msg("misplaced option \"%s\"", buf);
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return NULL;
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bb_error_msg_and_die("misplaced option \"%s\"", buf);
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}
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#endif
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break;
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case NONE:
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default:
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bb_error_msg("misplaced option \"%s\"", buf);
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return NULL;
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bb_error_msg_and_die("misplaced option \"%s\"", buf);
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}
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}
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free(buf);
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@ -1138,7 +1098,7 @@ static llist_t *read_iface_state(void)
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int ifupdown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ifupdown_main(int argc, char **argv)
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{
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int (*cmds)(struct interface_defn_t *) = NULL;
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int (*cmds)(struct interface_defn_t *);
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struct interfaces_file_t *defn;
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llist_t *target_list = NULL;
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const char *interfaces = "/etc/network/interfaces";
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@ -1161,10 +1121,6 @@ int ifupdown_main(int argc, char **argv)
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defn = read_interfaces(interfaces);
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debug_noise("\ndone reading %s\n\n", interfaces);
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if (!defn) {
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return EXIT_FAILURE;
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}
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startup_PATH = getenv("PATH");
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if (!startup_PATH) startup_PATH = "";
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