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Merge "ueventd: allow matching symlink names when setting permissions"

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Colin Cross 2014-07-02 20:58:54 +00:00 committed by Gerrit Code Review
commit 09117c70f1
1 changed files with 38 additions and 13 deletions
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51
init/devices.c
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@ -170,7 +170,24 @@ void fixup_sys_perms(const char *upath)
}
}
static mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid)
static bool perm_path_matches(const char *path, struct perms_ *dp)
{
if (dp->prefix) {
if (strncmp(path, dp->name, strlen(dp->name)) == 0)
return true;
} else if (dp->wildcard) {
if (fnmatch(dp->name, path, FNM_PATHNAME) == 0)
return true;
} else {
if (strcmp(path, dp->name) == 0)
return true;
}
return false;
}
static mode_t get_device_perm(const char *path, const char **links,
unsigned *uid, unsigned *gid)
{
mode_t perm;
struct listnode *node;
@ -181,22 +198,30 @@ static mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid)
* override ueventd.rc
*/
list_for_each_reverse(node, &dev_perms) {
bool match = false;
perm_node = node_to_item(node, struct perm_node, plist);
dp = &perm_node->dp;
if (dp->prefix) {
if (strncmp(path, dp->name, strlen(dp->name)))
continue;
} else if (dp->wildcard) {
if (fnmatch(dp->name, path, FNM_PATHNAME) != 0)
continue;
if (perm_path_matches(path, dp)) {
match = true;
} else {
if (strcmp(path, dp->name))
continue;
if (links) {
int i;
for (i = 0; links[i]; i++) {
if (perm_path_matches(links[i], dp)) {
match = true;
break;
}
}
}
}
if (match) {
*uid = dp->uid;
*gid = dp->gid;
return dp->perm;
}
*uid = dp->uid;
*gid = dp->gid;
return dp->perm;
}
/* Default if nothing found. */
*uid = 0;
@ -215,7 +240,7 @@ static void make_device(const char *path,
dev_t dev;
char *secontext = NULL;
mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR);
mode = get_device_perm(path, links, &uid, &gid) | (block ? S_IFBLK : S_IFCHR);
if (sehandle) {
selabel_lookup_best_match(sehandle, &secontext, path, links, mode);