RIP BOOL. Convert BOOL -> bool. I found a few interesting

[tprouty/samba.git] / source3 / lib / util_sec.c

diff --git a/source3/lib/util_sec.c b/source3/lib/util_sec.c
index d59b1b0471664a7b9a0f67cd4337a1418b67f89f..d7984ac99965fe0cb25f8879044998b2fc069c87 100644 (file)
--- a/source3/lib/util_sec.c
+++ b/source3/lib/util_sec.c
@@ -5,7 +5,7 @@
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -14,8 +14,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef AUTOCONF_TEST
@@ -40,7 +39,7 @@
 
 #define DEBUG(x, y) printf y
 #define smb_panic(x) exit(1)
-#define BOOL int
+#define bool int
 #endif
 
 /* are we running as non-root? This is used by the regresison test code,
@@ -52,10 +51,16 @@ static gid_t initial_gid;
 remember what uid we got started as - this allows us to run correctly
 as non-root while catching trapdoor systems
 ****************************************************************************/
+
 void sec_init(void)
 {
-       initial_uid = geteuid();
-       initial_gid = getegid();
+       static int initialized;
+
+       if (!initialized) {
+               initial_uid = geteuid();
+               initial_gid = getegid();
+               initialized = 1;
+       }
 }
 
 /****************************************************************************
@@ -77,7 +82,7 @@ gid_t sec_initial_gid(void)
 /****************************************************************************
 are we running in non-root mode?
 ****************************************************************************/
-BOOL non_root_mode(void)
+bool non_root_mode(void)
 {
        return (initial_uid != (uid_t)0);
 }
@@ -177,13 +182,28 @@ void gain_root_group_privilege(void)
 
 
 /****************************************************************************
- Set *only* the effective uid.
- we want to end up with ruid==0 and euid==uid
+ Set effective uid, and possibly the real uid too.
+ We want to end up with either:
+  
+   ruid==uid and euid==uid
+
+ or
+
+   ruid==0 and euid==uid
+
+ depending on what the local OS will allow us to regain root from.
 ****************************************************************************/
 void set_effective_uid(uid_t uid)
 {
 #if USE_SETRESUID
-       setresuid(-1,uid,-1);
+        /* Set the effective as well as the real uid. */
+       if (setresuid(uid,uid,-1) == -1) {
+               if (errno == EAGAIN) {
+                       DEBUG(0, ("setresuid failed with EAGAIN. uid(%d) "
+                                 "might be over its NPROC limit\n",
+                                 (int)uid));
+               }
+       }
 #endif
 
 #if USE_SETREUID
@@ -227,6 +247,7 @@ void set_effective_gid(gid_t gid)
 }
 
 static uid_t saved_euid, saved_ruid;
+static gid_t saved_egid, saved_rgid;
 
 /****************************************************************************
  save the real and effective uid for later restoration. Used by the quotas
@@ -242,10 +263,9 @@ void save_re_uid(void)
 /****************************************************************************
  and restore them!
 ****************************************************************************/
-void restore_re_uid(void)
-{
-       set_effective_uid(0);
 
+void restore_re_uid_fromroot(void)
+{
 #if USE_SETRESUID
        setresuid(saved_ruid, saved_euid, -1);
 #elif USE_SETREUID
@@ -264,6 +284,46 @@ void restore_re_uid(void)
        assert_uid(saved_ruid, saved_euid);
 }
 
+void restore_re_uid(void)
+{
+       set_effective_uid(0);
+       restore_re_uid_fromroot();
+}
+
+/****************************************************************************
+ save the real and effective gid for later restoration. Used by the 
+ getgroups code
+****************************************************************************/
+void save_re_gid(void)
+{
+       saved_rgid = getgid();
+       saved_egid = getegid();
+}
+
+/****************************************************************************
+ and restore them!
+****************************************************************************/
+void restore_re_gid(void)
+{
+#if USE_SETRESUID
+       setresgid(saved_rgid, saved_egid, -1);
+#elif USE_SETREUID
+       setregid(saved_rgid, -1);
+       setregid(-1,saved_egid);
+#elif USE_SETUIDX
+       setgidx(ID_REAL, saved_rgid);
+       setgidx(ID_EFFECTIVE, saved_egid);
+#else
+       set_effective_gid(saved_egid);
+       if (getgid() != saved_rgid)
+               setgid(saved_rgid);
+       set_effective_gid(saved_egid);
+#endif
+
+       assert_gid(saved_rgid, saved_egid);
+}
+
+
 /****************************************************************************
  set the real AND effective uid to the current effective uid in a way that
  allows root to be regained.
@@ -416,7 +476,7 @@ main()
 /****************************************************************************
 Check if we are setuid root.  Used in libsmb and smbpasswd paranoia checks.
 ****************************************************************************/
-BOOL is_setuid_root(void) 
+bool is_setuid_root(void) 
 {
        return (geteuid() == (uid_t)0) && (getuid() != (uid_t)0);
 }