2 * libuci - Library for the Unified Configuration Interface
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 * This file contains the code for handling uci config history files
20 #include <sys/types.h>
29 int uci_set_savedir(struct uci_context *ctx, const char *dir)
34 UCI_ASSERT(ctx, dir != NULL);
36 sdir = uci_strdup(ctx, dir);
37 if (ctx->savedir != uci_savedir)
43 int uci_add_history_path(struct uci_context *ctx, const char *dir)
45 struct uci_element *e;
48 UCI_ASSERT(ctx, dir != NULL);
49 e = uci_alloc_generic(ctx, UCI_TYPE_PATH, dir, sizeof(struct uci_element));
50 uci_list_add(&ctx->history_path, &e->list);
55 static void uci_parse_history_line(struct uci_context *ctx, struct uci_package *p, char *buf)
67 } else if (buf[0] == '@') {
72 UCI_INTERNAL(uci_parse_tuple, ctx, buf, &package, §ion, &option, &value);
73 if (!package || (strcmp(package, p->e.name) != 0))
75 if (!uci_validate_name(section))
77 if (option && !uci_validate_name(option))
79 if ((rename || !delete) && !uci_validate_name(value))
83 UCI_INTERNAL(uci_rename, ctx, p, section, option, value);
85 UCI_INTERNAL(uci_delete, ctx, p, section, option);
87 UCI_INTERNAL(uci_set, ctx, p, section, option, value);
91 UCI_THROW(ctx, UCI_ERR_PARSE);
94 static void uci_parse_history(struct uci_context *ctx, FILE *stream, struct uci_package *p)
96 struct uci_parse_context *pctx;
98 /* make sure no memory from previous parse attempts is leaked */
102 pctx = (struct uci_parse_context *) uci_malloc(ctx, sizeof(struct uci_parse_context));
106 while (!feof(pctx->file)) {
112 * ignore parse errors in single lines, we want to preserve as much
113 * history as possible
115 UCI_TRAP_SAVE(ctx, error);
116 uci_parse_history_line(ctx, p, pctx->buf);
117 UCI_TRAP_RESTORE(ctx);
122 /* no error happened, we can get rid of the parser context now */
123 ctx->internal = true;
127 static void uci_load_history_file(struct uci_context *ctx, struct uci_package *p, char *filename, FILE **f, bool flush)
131 UCI_TRAP_SAVE(ctx, done);
132 stream = uci_open_stream(ctx, filename, SEEK_SET, flush, false);
134 uci_parse_history(ctx, stream, p);
135 UCI_TRAP_RESTORE(ctx);
140 uci_close_stream(stream);
143 static void uci_load_history(struct uci_context *ctx, struct uci_package *p, bool flush)
145 struct uci_element *e;
146 char *filename = NULL;
152 uci_foreach_element(&ctx->history_path, e) {
153 if ((asprintf(&filename, "%s/%s", e->name, p->e.name) < 0) || !filename)
154 UCI_THROW(ctx, UCI_ERR_MEM);
156 uci_load_history_file(ctx, p, filename, NULL, false);
160 if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
161 UCI_THROW(ctx, UCI_ERR_MEM);
163 uci_load_history_file(ctx, p, filename, &f, flush);
166 ftruncate(fileno(f), 0);
174 int uci_save(struct uci_context *ctx, struct uci_package *p)
177 char *filename = NULL;
178 struct uci_element *e, *tmp;
181 UCI_ASSERT(ctx, p != NULL);
184 * if the config file was outside of the /etc/config path,
185 * don't save the history to a file, update the real file
187 * does not modify the uci_package pointer
190 return uci_commit(ctx, &p, false);
192 if (uci_list_empty(&p->history))
195 if ((asprintf(&filename, "%s/%s", ctx->savedir, p->e.name) < 0) || !filename)
196 UCI_THROW(ctx, UCI_ERR_MEM);
199 UCI_TRAP_SAVE(ctx, done);
200 f = uci_open_stream(ctx, filename, SEEK_END, true, true);
201 UCI_TRAP_RESTORE(ctx);
203 uci_foreach_element_safe(&p->history, tmp, e) {
204 struct uci_history *h = uci_to_history(e);
206 if (h->cmd == UCI_CMD_REMOVE)
208 else if (h->cmd == UCI_CMD_RENAME)
211 fprintf(f, "%s.%s", p->e.name, h->section);
213 fprintf(f, ".%s", e->name);
215 if (h->cmd == UCI_CMD_REMOVE)
218 fprintf(f, "=%s\n", h->value);
227 UCI_THROW(ctx, ctx->errno);