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* cygwin.din: Define symbols for `cygwin_logon_user' and

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`cygwin_set_impersonation_token'.
        * dcrt0.cc (dll_crt0_1): Eliminate superfluous conditional
        statements.
        Add load statements for `ImpersonateLoggedOnUser', `LogonUserA'
        and `RevertToSelf'.
        * fork.cc (fork): Care for correct impersonation of parent
        and child process.
        * security.cc (cygwin_set_impersonation_token): New function.
        (cygwin_logon_user): Ditto.
        shared.h (class pinfo): New members `orig_uid', `orig_gid',
        `real_uid' nad `real_gid'.
        spawn.cc (spawn_guts): Care for impersonation when starting
        child process in a different user context.
        * syscalls.cc (setgid): Call `setegid' now. Set real_gid.
        (setuid): Call `seteuid' now. Set real_uid.
        (seteuid): Functionality moved from setuid to here. Care for
        correct impersonation.
        (setegid): Functionality moved from setgid to here.
        * uinfo.cc (uinfo_init): Initialization of additional pinfo
        members.
        (getuid): Return real uid.
        (getgid): Return real gid.
        (geteuid): Return effective uid.
        (getegid): Return effective gid.
        include/sys/cygwin.h: Add prototypes for `cygwin_logon_user' and
        `cygwin_set_impersonation_token'.
        include/cygwin/version.h: Bumb API minor version to 22.
This commit is contained in:
Corinna Vinschen
2000-06-16 19:36:07 +00:00
parent 3875d9e652
commit 64b3062937
11 changed files with 261 additions and 64 deletions
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140
winsup/cygwin/syscalls.cc
View File

@@ -1796,6 +1796,92 @@ mknod ()
extern "C"
int
setgid (gid_t gid)
{
int ret = setegid (gid);
if (!ret)
myself->real_gid = myself->gid;
return ret;
}
/* setuid: POSIX 4.2.2.1 */
extern "C"
int
setuid (uid_t uid)
{
int ret = seteuid (uid);
if (!ret)
myself->real_uid = myself->uid;
debug_printf ("real: %d, effective: %d", myself->real_uid, myself->uid);
return ret;
}
extern char *internal_getlogin (struct pinfo *pi);
/* seteuid: standards? */
extern "C"
int
seteuid (uid_t uid)
{
if (os_being_run == winNT)
{
if (uid != (uid_t) -1)
{
struct passwd *pw_new = getpwuid (uid);
if (!pw_new)
{
set_errno (EINVAL);
return -1;
}
if (uid != myself->uid)
if (uid == myself->orig_uid)
{
debug_printf ("RevertToSelf() (uid == orig_uid, token=%d)",
myself->token);
RevertToSelf();
if (myself->token != INVALID_HANDLE_VALUE)
myself->impersonated = FALSE;
}
else if (!myself->impersonated)
{
debug_printf ("Impersonate(uid == %d)", uid);
RevertToSelf();
if (myself->token != INVALID_HANDLE_VALUE)
if (!ImpersonateLoggedOnUser (myself->token))
system_printf ("Impersonate(%d) in set(e)uid failed: %E",
myself->token);
else
myself->impersonated = TRUE;
}
struct pinfo pi;
pi.psid = (PSID) pi.sidbuf;
struct passwd *pw_cur = getpwnam (internal_getlogin (&pi));
if (pw_cur != pw_new)
{
debug_printf ("Diffs!!! token: %d, cur: %d, new: %d, orig: %d",
myself->token, pw_cur->pw_uid,
pw_new->pw_uid, myself->orig_uid);
set_errno (EPERM);
return -1;
}
myself->uid = uid;
strcpy (myself->username, pi.username);
CopySid (40, myself->psid, pi.psid);
strcpy (myself->logsrv, pi.logsrv);
strcpy (myself->domain, pi.domain);
}
}
else
set_errno (ENOSYS);
debug_printf ("real: %d, effective: %d", myself->real_uid, myself->uid);
return 0;
}
/* setegid: from System V. */
extern "C"
int
setegid (gid_t gid)
{
if (os_being_run == winNT)
{
@@ -1814,60 +1900,6 @@ setgid (gid_t gid)
return 0;
}
extern char *internal_getlogin (struct pinfo *pi);
/* setuid: POSIX 4.2.2.1 */
extern "C"
int
setuid (uid_t uid)
{
if (os_being_run == winNT)
{
if (uid != (uid_t) -1)
{
struct passwd *pw_new = getpwuid (uid);
if (!pw_new)
{
set_errno (EINVAL);
return -1;
}
struct pinfo pi;
pi.psid = (PSID) pi.sidbuf;
struct passwd *pw_cur = getpwnam (internal_getlogin (&pi));
if (pw_cur != pw_new)
{
set_errno (EPERM);
return -1;
}
myself->uid = uid;
strcpy (myself->username, pi.username);
CopySid (40, myself->psid, pi.psid);
strcpy (myself->logsrv, pi.logsrv);
strcpy (myself->domain, pi.domain);
}
}
else
set_errno (ENOSYS);
return 0;
}
/* seteuid: standards? */
extern "C"
int
seteuid (uid_t uid)
{
return setuid (uid);
}
/* setegid: from System V. */
extern "C"
int
setegid (gid_t gid)
{
return setgid (gid);
}
/* chroot: privileged Unix system call. */
extern "C"
int