void priv_init(void)
{
uid = cur_uid = getuid();
if (!uid) under_root_login =1;
euid = cur_euid = geteuid();
if (!euid) can_do_root_stuff = 1;
if (!uid) skip_priv_setting = 1;
gid = cur_gid = getgid();
egid = cur_egid = getegid();
/* must store the /proc/self/exe symlink contents before dropping
privs! */
dosemu_proc_self_exe = readlink_malloc("/proc/self/exe");
/* For Fedora we must also save a file descriptor to /proc/self/maps */
dosemu_proc_self_maps_fd = open("/proc/self/maps", O_RDONLY);
if (under_root_login)
{
/* check for sudo and set to original user */
char *s = getenv("SUDO_GID");
if (s) {
gid = cur_gid = atoi(s);
if (gid) {
setregid(gid, egid);
}
}
s = getenv("SUDO_UID");
if (s) {
uid = cur_uid = atoi(s);
if (uid) {
skip_priv_setting = under_root_login = 0;
using_sudo = 1;
s = getenv("SUDO_USER");
if (s) {
initgroups(s, gid);
setenv("USER", s, 1);
}
setreuid(uid, euid);
}
}
}
if (!can_do_root_stuff)
{
skip_priv_setting = 1;
}
num_groups = getgroups(0,0);
groups = malloc(num_groups * sizeof(gid_t));
getgroups(num_groups,groups);
if (!skip_priv_setting) _priv_off();
}
int priv_iopl(int pl)
{
int ret;
if (PRIVS_ARE_OFF) {
_priv_on();
ret = iopl(pl);
_priv_off();
}
else ret = iopl(pl);
#ifdef X86_EMULATOR
if (config.cpu_vm == CPUVM_EMU) e_priv_iopl(pl);
#endif
if (ret == 0)
current_iopl = pl;
return ret;
}
void priv_init(void)
{
uid = cur_uid = getuid();
if (!uid) under_root_login =1;
euid = cur_euid = geteuid();
if (!euid) can_do_root_stuff = 1;
if (!uid) skip_priv_setting = 1;
gid = cur_gid = getgid();
egid = cur_egid = getegid();
/* must store the /proc/self/exe symlink contents before dropping
privs! */
dosemu_proc_self_exe = readlink_malloc("/proc/self/exe");
/* For Fedora we must also save a file descriptor to /proc/self/maps */
dosemu_proc_self_maps_fd = open("/proc/self/maps", O_RDONLY);
if (under_root_login)
{
/* check for sudo and set to original user */
char *s = getenv("SUDO_GID");
if (s) {
gid = cur_gid = atoi(s);
if (gid) {
setregid(gid, egid);
}
}
s = getenv("SUDO_UID");
if (s) {
uid = cur_uid = atoi(s);
if (uid) {
pid_t ppid;
char *path;
FILE *fp;
size_t n;
char *line;
skip_priv_setting = under_root_login = 0;
using_sudo = 1;
s = getenv("SUDO_USER");
if (s) {
initgroups(s, gid);
setenv("USER", s, 1);
}
setreuid(uid, euid);
/* retrieve $HOME from sudo's (the parent process') environment */
ppid = getppid();
if (asprintf(&path, "/proc/%d/environ", ppid) != -1) {
if ((fp = fopen(path, "r"))) {
line = NULL;
while(getdelim(&line, &n, '\0', fp) != -1) {
if(n>5 && memcmp(line, "HOME=", 5) == 0) {
setenv("HOME", line+5, 1);
}
}
free(line);
fclose(fp);
}
free(path);
}
}
}
}
if (!can_do_root_stuff)
{
skip_priv_setting = 1;
}
num_groups = getgroups(0,0);
groups = malloc(num_groups * sizeof(gid_t));
getgroups(num_groups,groups);
if (!skip_priv_setting) _priv_off();
}
int real_leave_priv_setting(saved_priv_status *privs)
{
if (skip_priv_setting) return 1;
if (PRIVS_WERE_ON(privs)) return _priv_on();
return _priv_off();
}
int real_enter_priv_off(saved_priv_status *privs)
{
if (skip_priv_setting) return 1;
push_priv(privs);
return _priv_off();
}
