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-rw-r--r--source3/libads/kerberos.c39
1 files changed, 27 insertions, 12 deletions
diff --git a/source3/libads/kerberos.c b/source3/libads/kerberos.c
index 0b62ebf4e4b..48a832e1a90 100644
--- a/source3/libads/kerberos.c
+++ b/source3/libads/kerberos.c
@@ -958,22 +958,37 @@ bool create_local_private_krb5_conf_for_domain(const char *realm,
/* Insanity, sheer insanity..... */
if (strequal(realm, lp_realm())) {
- char linkpath[PATH_MAX+1];
- int lret;
-
- lret = readlink(SYSTEM_KRB5_CONF_PATH, linkpath, sizeof(linkpath)-1);
- if (lret != -1) {
- linkpath[lret] = '\0';
- }
-
- if (lret != -1 || strcmp(linkpath, fname) == 0) {
- /* Symlink already exists. */
- goto done;
+ SMB_STRUCT_STAT sbuf;
+
+ if (sys_lstat(SYSTEM_KRB5_CONF_PATH, &sbuf, false) == 0) {
+ if (S_ISLNK(sbuf.st_ex_mode) && sbuf.st_ex_size) {
+ int lret;
+ size_t alloc_size = sbuf.st_ex_size + 1;
+ char *linkpath = TALLOC_ARRAY(talloc_tos(), char,
+ alloc_size);
+ if (!linkpath) {
+ goto done;
+ }
+ lret = readlink(SYSTEM_KRB5_CONF_PATH, linkpath,
+ alloc_size - 1);
+ if (lret == -1) {
+ TALLOC_FREE(linkpath);
+ goto done;
+ }
+ linkpath[lret] = '\0';
+
+ if (strcmp(linkpath, fname) == 0) {
+ /* Symlink already exists. */
+ TALLOC_FREE(linkpath);
+ goto done;
+ }
+ TALLOC_FREE(linkpath);
+ }
}
/* Try and replace with a symlink. */
if (symlink(fname, SYSTEM_KRB5_CONF_PATH) == -1) {
- const char *newpath = SYSTEM_KRB5_CONF_PATH ## ".saved";
+ const char *newpath = SYSTEM_KRB5_CONF_PATH ".saved";
if (errno != EEXIST) {
DEBUG(0,("create_local_private_krb5_conf_for_domain: symlink "
"of %s to %s failed. Errno %s\n",