#define RUNAS_CHILD_STACK_SIZE 10485760
-#ifndef MAP_STACK
-#define MAP_STACK 0
+#ifdef __FreeBSD__
+/* FreeBSD MAP_STACK always return -ENOMEM */
+#define LTTNG_MAP_STACK 0
+#else
+#define LTTNG_MAP_STACK MAP_STACK
#endif
#ifndef MAP_GROWSDOWN
-#define GROWSDOWN 0
+#define MAP_GROWSDOWN 0
#endif
#ifndef MAP_ANONYMOUS
}
static
-int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
+int run_as_clone(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
{
struct run_as_data run_as_data;
int ret = 0;
run_as_data.retval_pipe = retval_pipe[1]; /* write end */
child_stack = mmap(NULL, RUNAS_CHILD_STACK_SIZE,
PROT_WRITE | PROT_READ,
- MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS | MAP_STACK,
+ MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS | LTTNG_MAP_STACK,
-1, 0);
if (child_stack == MAP_FAILED) {
perror("mmap");
return retval.i;
}
+/*
+ * To be used on setups where gdb has issues debugging programs using
+ * clone/rfork. Note that this is for debuging ONLY, and should not be
+ * considered secure.
+ */
+static
+int run_as_noclone(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
+{
+ return cmd(data);
+}
+
+static
+int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
+{
+ if (!getenv("LTTNG_DEBUG_NOCLONE")) {
+ DBG("Using run_as_clone");
+ return run_as_clone(cmd, data, uid, gid);
+ } else {
+ DBG("Using run_as_noclone");
+ return run_as_noclone(cmd, data, uid, gid);
+ }
+}
+
int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid)
{
struct run_as_mkdir_data data;