#ifdef USE_HOSTCC /* HOST build */
# include <string.h>
# include <assert.h>
+# include <ctype.h>
# ifndef debug
# ifdef DEBUG
#else /* U-Boot build */
# include <common.h>
# include <linux/string.h>
+# include <linux/ctype.h>
#endif
#ifndef CONFIG_ENV_MIN_ENTRIES /* minimum number of entries */
* be freed and the local static variable can be marked as not used.
*/
-void hdestroy_r(struct hsearch_data *htab)
+void hdestroy_r(struct hsearch_data *htab, int do_apply)
{
int i;
for (i = 1; i <= htab->size; ++i) {
if (htab->table[i].used > 0) {
ENTRY *ep = &htab->table[i].entry;
-
- free(ep->key);
+ if (do_apply && htab->apply != NULL) {
+ /* deletion is always forced */
+ htab->apply(ep->key, ep->data, NULL, H_FORCE);
+ }
+ free((void *)ep->key);
free(ep->data);
}
}
* example for functions like hdelete().
*/
+/*
+ * hstrstr_r - return index to entry whose key and/or data contains match
+ */
+int hstrstr_r(const char *match, int last_idx, ENTRY ** retval,
+ struct hsearch_data *htab)
+{
+ unsigned int idx;
+
+ for (idx = last_idx + 1; idx < htab->size; ++idx) {
+ if (htab->table[idx].used <= 0)
+ continue;
+ if (strstr(htab->table[idx].entry.key, match) ||
+ strstr(htab->table[idx].entry.data, match)) {
+ *retval = &htab->table[idx].entry;
+ return idx;
+ }
+ }
+
+ __set_errno(ESRCH);
+ *retval = NULL;
+ return 0;
+}
+
int hmatch_r(const char *match, int last_idx, ENTRY ** retval,
struct hsearch_data *htab)
{
* do that.
*/
-int hdelete_r(const char *key, struct hsearch_data *htab)
+int hdelete_r(const char *key, struct hsearch_data *htab, int do_apply)
{
ENTRY e, *ep;
int idx;
/* free used ENTRY */
debug("hdelete: DELETING key \"%s\"\n", key);
-
- free(ep->key);
+ if (do_apply && htab->apply != NULL)
+ htab->apply(ep->key, ep->data, NULL, H_FORCE);
+ free((void *)ep->key);
free(ep->data);
htab->table[idx].used = -1;
}
ssize_t hexport_r(struct hsearch_data *htab, const char sep,
- char **resp, size_t size)
+ char **resp, size_t size,
+ int argc, char * const argv[])
{
ENTRY *list[htab->size];
char *res, *p;
return (-1);
}
- debug("EXPORT table = %p, htab.size = %d, htab.filled = %d, size = %d\n",
- htab, htab->size, htab->filled, size);
+ debug("EXPORT table = %p, htab.size = %d, htab.filled = %d, "
+ "size = %zu\n", htab, htab->size, htab->filled, size);
/*
* Pass 1:
* search used entries,
if (htab->table[i].used > 0) {
ENTRY *ep = &htab->table[i].entry;
+ int arg, found = 0;
+
+ for (arg = 0; arg < argc; ++arg) {
+ if (strcmp(argv[arg], ep->key) == 0) {
+ found = 1;
+ break;
+ }
+ }
+ if ((argc > 0) && (found == 0))
+ continue;
list[n++] = ep;
/* Check if the user supplied buffer size is sufficient */
if (size) {
if (size < totlen + 1) { /* provided buffer too small */
- debug("### buffer too small: %d, but need %d\n",
- size, totlen + 1);
+ printf("Env export buffer too small: %zu, "
+ "but need %zu\n", size, totlen + 1);
__set_errno(ENOMEM);
return (-1);
}
* export sorted list of result data
*/
for (i = 0, p = res; i < n; ++i) {
- char *s;
+ const char *s;
s = list[i]->key;
while (*s)
* himport()
*/
+/*
+ * Check whether variable 'name' is amongst vars[],
+ * and remove all instances by setting the pointer to NULL
+ */
+static int is_var_in_set(const char *name, int nvars, char * vars[])
+{
+ int i = 0;
+ int res = 0;
+
+ /* No variables specified means process all of them */
+ if (nvars == 0)
+ return 1;
+
+ for (i = 0; i < nvars; i++) {
+ if (vars[i] == NULL)
+ continue;
+ /* If we found it, delete all of them */
+ if (!strcmp(name, vars[i])) {
+ vars[i] = NULL;
+ res = 1;
+ }
+ }
+ if (!res)
+ debug("Skipping non-listed variable %s\n", name);
+
+ return res;
+}
+
/*
* Import linearized data into hash table.
*
*/
int himport_r(struct hsearch_data *htab,
- const char *env, size_t size, const char sep, int flag)
+ const char *env, size_t size, const char sep, int flag,
+ int nvars, char * const __vars[], int do_apply)
{
char *data, *sp, *dp, *name, *value;
+ char *vars[nvars];
+ int i;
/* Test for correct arguments. */
if (htab == NULL) {
/* we allocate new space to make sure we can write to the array */
if ((data = malloc(size)) == NULL) {
- debug("himport_r: can't malloc %d bytes\n", size);
+ debug("himport_r: can't malloc %zu bytes\n", size);
__set_errno(ENOMEM);
return 0;
}
memcpy(data, env, size);
dp = data;
+ /* make a local copy of the list of variables */
+ if (nvars)
+ memcpy(vars, __vars, sizeof(__vars[0]) * nvars);
+
if ((flag & H_NOCLEAR) == 0) {
/* Destroy old hash table if one exists */
debug("Destroy Hash Table: %p table = %p\n", htab,
htab->table);
if (htab->table)
- hdestroy_r(htab);
+ hdestroy_r(htab, do_apply);
}
/*
ENTRY e, *rv;
/* skip leading white space */
- while ((*dp == ' ') || (*dp == '\t'))
+ while (isblank(*dp))
++dp;
/* skip comment lines */
*dp++ = '\0'; /* terminate name */
debug("DELETE CANDIDATE: \"%s\"\n", name);
+ if (!is_var_in_set(name, nvars, vars))
+ continue;
- if (hdelete_r(name, htab) == 0)
+ if (hdelete_r(name, htab, do_apply) == 0)
debug("DELETE ERROR ##############################\n");
continue;
*sp++ = '\0'; /* terminate value */
++dp;
+ /* Skip variables which are not supposed to be processed */
+ if (!is_var_in_set(name, nvars, vars))
+ continue;
+
/* enter into hash table */
e.key = name;
e.data = value;
+ /* if there is an apply function, check what it has to say */
+ if (do_apply && htab->apply != NULL) {
+ debug("searching before calling cb function"
+ " for %s\n", name);
+ /*
+ * Search for variable in existing env, so to pass
+ * its previous value to the apply callback
+ */
+ hsearch_r(e, FIND, &rv, htab);
+ debug("previous value was %s\n", rv ? rv->data : "");
+ if (htab->apply(name, rv ? rv->data : NULL,
+ value, flag)) {
+ debug("callback function refused to set"
+ " variable %s, skipping it!\n", name);
+ continue;
+ }
+ }
+
hsearch_r(e, ENTER, &rv, htab);
if (rv == NULL) {
printf("himport_r: can't insert \"%s=%s\" into hash table\n",
debug("INSERT: free(data = %p)\n", data);
free(data);
+ /* process variables which were not considered */
+ for (i = 0; i < nvars; i++) {
+ if (vars[i] == NULL)
+ continue;
+ /*
+ * All variables which were not deleted from the variable list
+ * were not present in the imported env
+ * This could mean two things:
+ * a) if the variable was present in current env, we delete it
+ * b) if the variable was not present in current env, we notify
+ * it might be a typo
+ */
+ if (hdelete_r(vars[i], htab, do_apply) == 0)
+ printf("WARNING: '%s' neither in running nor in imported env!\n", vars[i]);
+ else
+ printf("WARNING: '%s' not in imported env, deleting it!\n", vars[i]);
+ }
+
debug("INSERT: done\n");
return 1; /* everything OK */
}
projects / u-boot / blobdiff