add a missing nullpointer check

[project/uci.git] / list.c

diff --git a/list.c b/list.c
index 3fc6076..15f544e 100644 (file)
--- a/list.c
+++ b/list.c
@@ -2,9 +2,9 @@
  * libuci - Library for the Unified Configuration Interface
  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
  *
- * this program is free software; you can redistribute it and/or modify
- * it under the terms of the gnu lesser general public license version 2.1
- * as published by the free software foundation
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -151,44 +151,6 @@ uci_free_section(struct uci_section *s)
        uci_free_element(&s->e);
 }
 
-/* record a change that was done to a package */
-static void
-uci_add_history(struct uci_context *ctx, struct uci_package *p, int cmd, char *section, char *option, char *value)
-{
-       struct uci_history *h;
-       int size = strlen(section) + 1;
-       char *ptr;
-
-       if (!p->confdir)
-               return;
-
-       if (value)
-               size += strlen(section) + 1;
-
-       h = uci_alloc_element(ctx, history, option, size);
-       ptr = uci_dataptr(h);
-       h->cmd = cmd;
-       h->section = strcpy(ptr, section);
-       if (value) {
-               ptr += strlen(ptr) + 1;
-               h->value = strcpy(ptr, value);
-       }
-       uci_list_add(&p->history, &h->e.list);
-}
-
-static void
-uci_free_history(struct uci_history *h)
-{
-       if (!h)
-               return;
-       if ((h->section != NULL) &&
-               (h->section != uci_dataptr(h))) {
-               free(h->section);
-               free(h->value);
-       }
-       uci_free_element(&h->e);
-}
-
 static struct uci_package *
 uci_alloc_package(struct uci_context *ctx, const char *name)
 {
@@ -198,6 +160,7 @@ uci_alloc_package(struct uci_context *ctx, const char *name)
        p->ctx = ctx;
        uci_list_init(&p->sections);
        uci_list_init(&p->history);
+       uci_list_init(&p->saved_history);
        return p;
 }
 
@@ -218,6 +181,9 @@ uci_free_package(struct uci_package **package)
        uci_foreach_element_safe(&p->history, tmp, e) {
                uci_free_history(uci_to_history(e));
        }
+       uci_foreach_element_safe(&p->saved_history, tmp, e) {
+               uci_free_history(uci_to_history(e));
+       }
        uci_free_element(&p->e);
        *package = NULL;
 }
@@ -252,6 +218,8 @@ int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_pac
        if (option) {
                s = uci_to_section(e);
                e = uci_lookup_list(ctx, &s->options, option);
+               if (!e)
+                       goto notfound;
        }
 
        *res = e;
@@ -294,8 +262,8 @@ int uci_del_element(struct uci_context *ctx, struct uci_element *e)
        }
 
        p = s->package;
-       if (!internal)
-               uci_add_history(ctx, p, UCI_CMD_REMOVE, s->e.name, option, NULL);
+       if (!internal && p->confdir)
+               uci_add_history(ctx, &p->history, UCI_CMD_REMOVE, s->e.name, option, NULL);
 
        switch(e->type) {
        case UCI_TYPE_SECTION:
@@ -339,7 +307,7 @@ int uci_set_element_value(struct uci_context *ctx, struct uci_element **element,
        list = e->list.prev;
        switch(e->type) {
        case UCI_TYPE_SECTION:
-               UCI_ASSERT(ctx, uci_validate_name(value));
+               UCI_ASSERT(ctx, uci_validate_str(value, false));
                size = sizeof(struct uci_section);
                s = uci_to_section(e);
                section = e->name;
@@ -357,8 +325,8 @@ int uci_set_element_value(struct uci_context *ctx, struct uci_element **element,
                return 0;
        }
        p = s->package;
-       if (!internal)
-               uci_add_history(ctx, p, UCI_CMD_CHANGE, section, option, value);
+       if (!internal && p->confdir)
+               uci_add_history(ctx, &p->history, UCI_CMD_CHANGE, section, option, value);
 
        uci_list_del(&e->list);
        e = uci_realloc(ctx, e, size);
@@ -391,8 +359,8 @@ int uci_rename(struct uci_context *ctx, struct uci_package *p, char *section, ch
        /* NB: p, section, option validated by uci_lookup */
        UCI_INTERNAL(uci_lookup, ctx, &e, p, section, option);
 
-       if (!internal)
-               uci_add_history(ctx, p, UCI_CMD_RENAME, section, option, name);
+       if (!internal && p->confdir)
+               uci_add_history(ctx, &p->history, UCI_CMD_RENAME, section, option, name);
 
        name = uci_strdup(ctx, name);
        if (e->name)
@@ -414,11 +382,8 @@ int uci_delete(struct uci_context *ctx, struct uci_package *p, char *section, ch
        /* NB: p, section, option validated by uci_lookup */
        UCI_INTERNAL(uci_lookup, ctx, &e, p, section, option);
 
-       if (!internal)
-               return uci_del_element(ctx, e);
-       UCI_INTERNAL(uci_del_element, ctx, e);
-
-       return 0;
+       ctx->internal = internal;
+       return uci_del_element(ctx, e);
 }
 
 int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *value)
@@ -436,7 +401,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
                UCI_ASSERT(ctx, uci_validate_name(option));
                UCI_ASSERT(ctx, value != NULL);
        } else {
-               UCI_ASSERT(ctx, uci_validate_name(value));
+               UCI_ASSERT(ctx, uci_validate_str(value, false));
        }
 
        /*
@@ -449,7 +414,7 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
                goto notfound;
 
        s = uci_to_section(e);
-       if (ctx->pctx)
+       if (ctx->pctx && ctx->pctx->merge)
                ctx->pctx->section = s;
 
        if (option) {
@@ -468,11 +433,8 @@ int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char
        else
                e = &s->e;
 
-       if (!internal)
-               return uci_set_element_value(ctx, &e, value);
-
-       UCI_INTERNAL(uci_set_element_value, ctx, &e, value);
-       return 0;
+       ctx->internal = internal;
+       return uci_set_element_value(ctx, &e, value);
 
 notfound:
        /* 
@@ -485,13 +447,13 @@ notfound:
                UCI_THROW(ctx, UCI_ERR_NOTFOUND);
 
        /* now add the missing entry */
-       if (!internal)
-               uci_add_history(ctx, p, UCI_CMD_ADD, section, option, value);
+       if (!internal && p->confdir)
+               uci_add_history(ctx, &p->history, UCI_CMD_ADD, section, option, value);
        if (s)
                uci_alloc_option(s, option, value);
        else {
                s = uci_alloc_section(p, value, section);
-               if (ctx->pctx)
+               if (ctx->pctx && ctx->pctx->merge)
                        ctx->pctx->section = s;
        }