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

        `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.

2 files changed, 9 insertions, 1 deletions

diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index ffa17d080..2143bbba4 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -106,10 +106,15 @@ details. */
        19: Export fchown, lchown, lacl
        20: regsub, inet_network
        21: incompatible change to stdio cr/lf and buffering
+       22: Export cygwin_logon_user, cygwin_set_impersonation_token.
+           geteuid, getegid return effective uid/gid.
+           getuid, getgid return real uid/gid.
+           seteuid, setegid set only effective uid/gid.
+           setuid, setgid set effective and real uid/gid.
      */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 21
+#define CYGWIN_VERSION_API_MINOR 22
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible
diff --git a/winsup/cygwin/include/sys/cygwin.h b/winsup/cygwin/include/sys/cygwin.h
index ff891cc10..6354f0f88 100644
--- a/winsup/cygwin/include/sys/cygwin.h
+++ b/winsup/cygwin/include/sys/cygwin.h
@@ -31,6 +31,9 @@ extern int cygwin_conv_to_full_posix_path (const char *, char *);
 extern int cygwin_posix_path_list_p (const char *);
 extern void cygwin_split_path (const char *, char *, char *);
 
+extern HANDLE cygwin_logon_user (const struct passwd *, const char *);
+extern void cygwin_set_impersonation_token (const HANDLE);
+
 #ifdef _GNU_H_WINDOWS32_BASE
 /* included if <windows.h> is included */
 extern int cygwin32_attach_handle_to_fd (char *, int, HANDLE, int, int);