+
+/*
+ * script_setenv - set an environment variable value to be used
+ * for scripts that we run (e.g. ip-up, auth-up, etc.)
+ */
+void
+script_setenv(var, value)
+ char *var, *value;
+{
+ int vl = strlen(var);
+ int i;
+ char *p, *newstring;
+
+ newstring = (char *) malloc(vl + strlen(value) + 2);
+ if (newstring == 0)
+ return;
+ strcpy(newstring, var);
+ newstring[vl] = '=';
+ strcpy(newstring+vl+1, value);
+
+ /* check if this variable is already set */
+ if (script_env != 0) {
+ for (i = 0; (p = script_env[i]) != 0; ++i) {
+ if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
+ free(p);
+ script_env[i] = newstring;
+ return;
+ }
+ }
+ } else {
+ i = 0;
+ script_env = (char **) malloc(16 * sizeof(char *));
+ if (script_env == 0)
+ return;
+ s_env_nalloc = 16;
+ }
+
+ /* reallocate script_env with more space if needed */
+ if (i + 1 >= s_env_nalloc) {
+ int new_n = i + 17;
+ char **newenv = (char **) realloc((void *)script_env,
+ new_n * sizeof(char *));
+ if (newenv == 0)
+ return;
+ script_env = newenv;
+ s_env_nalloc = new_n;
+ }
+
+ script_env[i] = newstring;
+ script_env[i+1] = 0;
+}
+
+/*
+ * script_unsetenv - remove a variable from the environment
+ * for scripts.
+ */
+void
+script_unsetenv(var)
+ char *var;
+{
+ int vl = strlen(var);
+ int i;
+ char *p;
+
+ if (script_env == 0)
+ return;
+ for (i = 0; (p = script_env[i]) != 0; ++i) {
+ if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
+ free(p);
+ while ((script_env[i] = script_env[i+1]) != 0)
+ ++i;
+ break;
+ }
+ }
+}