-bool disable_old_keys(FILE *f) {
- char buf[100];
- long pos;
- bool disabled = false;
-
- rewind(f);
- pos = ftell(f);
-
- while(fgets(buf, sizeof buf, f)) {
- if(!strncmp(buf, "-----BEGIN RSA", 14)) {
- buf[11] = 'O';
- buf[12] = 'L';
- buf[13] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
- disabled = true;
+bool write_host_config(struct meshlink_handle *mesh, const struct splay_tree_t *config_tree, const char *name) {
+ char filename[PATH_MAX];
+
+ snprintf(filename, PATH_MAX, "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ return write_config_file(config_tree, filename);
+}
+
+bool modify_config_file(struct meshlink_handle *mesh, const char *name, const char *key, const char *value, int trim) {
+ assert(mesh && name && key);
+
+ char filename[PATH_MAX];
+ char tmpname[PATH_MAX];
+ bool error = false;
+
+ if(snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", mesh->confbase, name) >= PATH_MAX) {
+ logger(mesh, MESHLINK_ERROR, "Filename too long: %s" SLASH "hosts" SLASH "%s", mesh->confbase, name);
+ return false;
+ }
+
+ if(snprintf(tmpname, sizeof(tmpname), "%s.tmp", filename) >= PATH_MAX) {
+ logger(mesh, MESHLINK_ERROR, "Filename too long: %s.tmp", filename);
+ return false;
+ }
+
+ FILE *fr = fopen(filename, "r");
+
+ if(!fr) {
+ logger(mesh, MESHLINK_ERROR, "Cannot open config file %s: %s", filename, strerror(errno));
+ return false;
+ }
+
+ FILE *fw = fopen(tmpname, "w");
+
+ if(!fw) {
+ logger(mesh, MESHLINK_ERROR, "Cannot open temporary file %s: %s", tmpname, strerror(errno));
+ fclose(fr);
+ return false;
+ }
+
+ char buf[4096];
+ char *sep;
+ int found = 0;
+
+ if(value) {
+ fprintf(fw, "%s = %s\n", key, value);
+ found++;
+ }
+
+ while(readline(fr, buf, sizeof(buf))) {
+ if(!*buf || *buf == '#') {
+ goto copy;