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Guard in public API agains bad names or link destinations.

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This commit is contained in:
Vreixo Formoso
2007-12-24 04:20:29 +01:00
parent 227b17f251
commit 9de0be2602
2 changed files with 28 additions and 8 deletions
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25
src/node.c
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@ -79,20 +79,27 @@ enum IsoNodeType iso_node_get_type(IsoNode *node)
int iso_node_set_name(IsoNode *node, const char *name)
{
char *new;
if (node->parent != NULL) {
/* check if parent already has a node with same name */
if (iso_dir_get_node(node->parent, name, NULL) == 1) {
return ISO_NODE_NAME_NOT_UNIQUE;
}
}
/* guard against the empty string */
if (name[0] == '\0') {
if (name[0] == '\0' || strlen(name) > 255) {
return ISO_WRONG_ARG_VALUE;
}
if ((IsoNode*)node->parent == node) {
/* you can't change name of the root node */
return ISO_WRONG_ARG_VALUE;
}
new = strdup(name);
if (new == NULL) {
return ISO_MEM_ERROR;
}
if (node->parent != NULL) {
/* check if parent already has a node with same name */
if (iso_dir_get_node(node->parent, name, NULL) == 1) {
free(new);
return ISO_NODE_NAME_NOT_UNIQUE;
}
}
free(node->name);
node->name = new;
if (node->parent != NULL) {
@ -537,6 +544,10 @@ const char *iso_symlink_get_dest(const IsoSymlink *link)
*/
void iso_symlink_set_dest(IsoSymlink *link, const char *dest)
{
if (dest == NULL || dest[0] == '\0') {
/* guard against null or empty dest */
return;
}
free(link->dest);
link->dest = strdup(dest);
}