freebsd-ports/security/krb5/files/patch-as

--- clients/ksu/main.c.orig	Wed Aug 14 12:14:49 2002
+++ clients/ksu/main.c	Tue Jul 29 18:46:00 2003
@@ -32,6 +32,10 @@
 #include <signal.h>
 #include <grp.h>
 
+#ifdef LOGIN_CAP
+#include <login_cap.h>
+#endif
+
 /* globals */
 char * prog_name;
 int auth_debug =0;     
@@ -61,7 +65,7 @@
    ill specified arguments to commands */        
 
 void usage (){
-    fprintf(stderr, "Usage: %s [target user] [-n principal] [-c source cachename] [-k] [-D] [-r time] [-pf] [-l lifetime] [-zZ] [-q] [-e command [args... ] ] [-a [args... ] ]\n", prog_name);
+    fprintf(stderr, "Usage: %s [target user] [-m] [-n principal] [-c source cachename] [-C target cachename] [-k] [-D] [-r time] [-pf] [-l lifetime] [-zZ] [-q] [-e command [args... ] ] [-a [args... ] ]\n", prog_name);
 }
 
 /* for Ultrix and friends ... */
@@ -77,6 +81,7 @@
     int argc;
     char ** argv;
 { 
+    int asme = 0;
     int hp =0;
     int some_rest_copy = 0;	
     int all_rest_copy = 0;	
@@ -91,6 +96,7 @@
     char * cc_target_tag = NULL; 
     char * target_user = NULL;
     char * source_user;
+    char * source_shell;
     
     krb5_ccache cc_source = NULL;
     const char * cc_source_tag = NULL; 
@@ -117,6 +123,11 @@
     krb5_principal  kdc_server;
     krb5_boolean zero_password;
     char * dir_of_cc_target;     
+
+#ifdef LOGIN_CAP
+    login_cap_t *lc;
+    int setwhat;
+#endif
     
     options.opt = KRB5_DEFAULT_OPTIONS;
     options.lifetime = KRB5_DEFAULT_TKT_LIFE;
@@ -181,7 +192,7 @@
 	com_err (prog_name, errno, "while setting euid to source user");
 	exit (1);
     }
-    while(!done && ((option = getopt(pargc, pargv,"n:c:r:a:zZDfpkql:e:")) != -1)){
+    while(!done && ((option = getopt(pargc, pargv,"n:c:r:a:zZDfpkmql:e:")) != -1)){
 	switch (option) {
 	case 'r':
 	    options.opt |= KDC_OPT_RENEWABLE;
@@ -227,6 +238,9 @@
 		errflg++;
 	    }
 	    break;
+	case 'm':
+	    asme = 1;
+	    break;
 	case 'n': 
 	    if ((retval = krb5_parse_name(ksu_context, optarg, &client))){
 		com_err(prog_name, retval, "when parsing name %s", optarg); 
@@ -341,6 +355,7 @@
     
     /* allocate space and copy the usernamane there */        
     source_user = xstrdup(pwd->pw_name);
+    source_shell = xstrdup(pwd->pw_shell);
     source_uid = pwd->pw_uid;
     source_gid = pwd->pw_gid;
     
@@ -672,43 +687,64 @@
     /* get the shell of the user, this will be the shell used by su */      
     target_pwd = getpwnam(target_user);
     
-    if (target_pwd->pw_shell)
-	shell = xstrdup(target_pwd->pw_shell);
-    else {
-	shell = _DEF_CSH;  /* default is cshell */   
+    if (asme) {
+	if (source_shell && *source_shell) {
+	    shell = strdup(source_shell);
+	} else {
+	    shell = _DEF_CSH;
+	}
+    } else {
+	if (target_pwd->pw_shell)
+	    shell = strdup(target_pwd->pw_shell);
+	else {
+	    shell = _DEF_CSH;  /* default is cshell */
+	}
     }
     
 #ifdef HAVE_GETUSERSHELL
     
     /* insist that the target login uses a standard shell (root is omited) */ 
     
-    if (!standard_shell(target_pwd->pw_shell) && source_uid) {
-	fprintf(stderr, "ksu: permission denied (shell).\n");
-	sweep_up(ksu_context, cc_target);
-	exit(1);
+    if (asme) {
+	if (!standard_shell(pwd->pw_shell) && source_uid) {
+	    fprintf(stderr, "ksu: permission denied (shell).\n");
+	    sweep_up(ksu_context, cc_target);
+	    exit(1);
+	}
+    } else {
+	if (!standard_shell(target_pwd->pw_shell) && source_uid) {
+	    fprintf(stderr, "ksu: permission denied (shell).\n");
+	    sweep_up(ksu_context, cc_target);
+	    exit(1);
+	}
     }
 #endif /* HAVE_GETUSERSHELL */
     
-    if (target_pwd->pw_uid){
-	
-	if(set_env_var("USER", target_pwd->pw_name)){
+    if (!asme) {
+	if (target_pwd->pw_uid){
+	    if (set_env_var("USER", target_pwd->pw_name)){
+		fprintf(stderr,"ksu: couldn't set environment variable USER\n");
+		sweep_up(ksu_context, cc_target);
+		exit(1);
+	    }
+	}
+    
+	if (set_env_var( "HOME", target_pwd->pw_dir)){
 	    fprintf(stderr,"ksu: couldn't set environment variable USER\n");
 	    sweep_up(ksu_context, cc_target);
 	    exit(1);
-	} 			
-    }	
-    
-    if(set_env_var( "HOME", target_pwd->pw_dir)){
-	fprintf(stderr,"ksu: couldn't set environment variable USER\n");
-	sweep_up(ksu_context, cc_target);
-	exit(1);
-    } 			
+	}
     
-    if(set_env_var( "SHELL", shell)){
-	fprintf(stderr,"ksu: couldn't set environment variable USER\n");
-	sweep_up(ksu_context, cc_target);
-	exit(1);
-    } 			
+	if (set_env_var( "SHELL", shell)){
+	    fprintf(stderr,"ksu: couldn't set environment variable USER\n");
+	    sweep_up(ksu_context, cc_target);
+	    exit(1);
+	}
+    }
+
+#ifdef LOGIN_CAP
+       lc = login_getpwclass(pwd);
+#endif
     
     /* set the cc env name to target */         	
     
@@ -718,7 +754,19 @@
 	sweep_up(ksu_context, cc_target);
 	exit(1);
     } 			
-    
+   
+#ifdef LOGIN_CAP
+    setwhat = LOGIN_SETUSER|LOGIN_SETGROUP|LOGIN_SETRESOURCES|LOGIN_SETPRIORITY;
+    setwhat |= LOGIN_SETPATH|LOGIN_SETUMASK|LOGIN_SETENV;
+    /*
+     * Don't touch resource/priority settings if -m has been
+     * used or -l and -c hasn't, and we're not su'ing to root.
+     */
+    if (target_pwd->pw_uid)
+	setwhat &= ~(LOGIN_SETPRIORITY|LOGIN_SETRESOURCES);
+    if (setusercontext(lc, target_pwd, target_pwd->pw_uid, setwhat) < 0)
+	err(1, "setusercontext");
+#else
     /* set permissions */
     if (setgid(target_pwd->pw_gid) < 0) {
 	perror("ksu: setgid");
@@ -759,6 +807,7 @@
 	sweep_up(ksu_context, cc_target);
 	exit(1);
     }   
+#endif
     
     if (access( cc_target_tag_tmp, R_OK | W_OK )){
 	com_err(prog_name, errno,