#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 MAP_GROWSDOWN 0
+#endif
+
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
#endif
struct run_as_data {
ret = pipe(retval_pipe);
if (ret < 0) {
perror("pipe");
+ retval.i = ret;
goto end;
}
run_as_data.data = data;
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");
- ret = -ENOMEM;
+ retval.i = -ENOMEM;
goto close_pipe;
}
/*
&run_as_data);
if (pid < 0) {
perror("clone");
- ret = pid;
+ retval.i = pid;
goto unmap_stack;
}
/* receive return value */
pid = waitpid(pid, &status, 0);
if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
perror("wait");
- ret = -1;
+ retval.i = -1;
}
unmap_stack:
ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
if (ret < 0) {
perror("munmap");
+ retval.i = ret;
}
close_pipe:
close(retval_pipe[0]);