krb5 commit: Tighten up error checking in t_keytab.c

[Greg Hudson]

https://github.com/krb5/krb5/commit/a5c693ee32900b252490a75b18ed40088eb6fec0
commit a5c693ee32900b252490a75b18ed40088eb6fec0
Author: Greg Hudson <ghudson at mit.edu>
Date:   Sat Jun 2 13:54:12 2012 -0400

    Tighten up error checking in t_keytab.c
    
    When checking for specific error codes, using CHECK() meant that we
    wouldn't properly fail if we got error code 0.  Define and use a
    CHECK_ERR() to test for a specific error code, and define CHECK() in
    terms of it.

 src/lib/krb5/keytab/t_keytab.c |   45 ++++++++++++++-------------------------
 1 files changed, 16 insertions(+), 29 deletions(-)

diff --git a/src/lib/krb5/keytab/t_keytab.c b/src/lib/krb5/keytab/t_keytab.c
index 6e87076..6b64d52 100644
--- a/src/lib/krb5/keytab/t_keytab.c
+++ b/src/lib/krb5/keytab/t_keytab.c
@@ -40,13 +40,14 @@ extern const krb5_kt_ops krb5_ktf_writable_ops;
 
 #define KRB5_OK 0
 
-#define CHECK(kret,msg)                                 \
-    if (kret != KRB5_OK) {                              \
+#define CHECK_ERR(kret,err,msg)                         \
+    if (kret != err) {                                  \
         com_err(msg, kret, "");                         \
         fflush(stderr);                                 \
         exit(1);                                        \
     } else if(debug) printf("%s went ok\n", msg);
 
+#define CHECK(kret,msg) CHECK_ERR(kret, 0, msg)
 
 #define CHECK_STR(str,msg)                              \
     if (str == 0) {                                     \
@@ -66,9 +67,7 @@ test_misc(krb5_context context)
     fprintf(stderr, "Testing miscellaneous error conditions\n");
 
     kret = krb5_kt_resolve(context, "unknown_method_ep:/tmp/name", &ktid);
-    if (kret != KRB5_KT_UNKNOWN_TYPE) {
-        CHECK(kret, "resolve unknown type");
-    }
+    CHECK_ERR(kret, KRB5_KT_UNKNOWN_TYPE, "resolve unknown type");
 
     /* Test length limits on krb5_kt_default_name */
     kret = krb5_kt_default_name(context, defname, sizeof(defname));
@@ -82,9 +81,7 @@ test_misc(krb5_context context)
     }
     kret = krb5_kt_default_name(context, name, strlen(defname));
     free(name);
-    if (kret != KRB5_CONFIG_NOTENUFSPACE) {
-        CHECK(kret, "krb5_kt_default_name limited");
-    }
+    CHECK_ERR(kret, KRB5_CONFIG_NOTENUFSPACE, "krb5_kt_default_name limited");
 }
 
 static void
@@ -117,25 +114,22 @@ kt_test(krb5_context context, const char *name)
     */
     p = malloc(strlen(buf));
     kret = krb5_kt_get_name(context, kt, p, 1);
-    if(kret != KRB5_KT_NAME_TOOLONG) {
-        CHECK(kret, "get_name - size 1");
-    }
+    CHECK_ERR(kret, KRB5_KT_NAME_TOOLONG, "get_name - size 1");
 
 
     kret = krb5_kt_get_name(context, kt, p, strlen(buf));
-    if(kret != KRB5_KT_NAME_TOOLONG) {
-        CHECK(kret, "get_name");
-    }
+    CHECK_ERR(kret, KRB5_KT_NAME_TOOLONG, "get_name");
     free(p);
 
     /* Try to lookup unknown principal - when keytab does not exist*/
     kret = krb5_parse_name(context, "test/test2 at TEST.MIT.EDU", &princ);
     CHECK(kret, "parsing principal");
 
-
+    /* This will return ENOENT for FILE because the file doesn't exist,
+     * so accept that or KRB5_KT_NOTFOUND. */
     kret = krb5_kt_get_entry(context, kt, princ, 0, 0, &kent);
-    if((kret != KRB5_KT_NOTFOUND) && (kret != ENOENT)) {
-        CHECK(kret, "Getting non-existant entry");
+    if (kret != ENOENT) {
+        CHECK_ERR(kret, KRB5_KT_NOTFOUND, "Getting non-existent entry");
     }
 
 
@@ -199,9 +193,7 @@ kt_test(krb5_context context, const char *name)
         cnt++;
         krb5_free_keytab_entry_contents(context, &kent);
     }
-    if (kret != KRB5_KT_END) {
-        CHECK(kret, "getting next entry");
-    }
+    CHECK_ERR(kret, KRB5_KT_END, "getting next entry");
 
     if(cnt != 3) {
         fprintf(stderr, "Mismatch in number of entries in keytab");
@@ -219,9 +211,7 @@ kt_test(krb5_context context, const char *name)
 
 
     kret = krb5_kt_get_entry(context, kt, princ, 0, 0, &kent);
-    if((kret != KRB5_KT_NOTFOUND)) {
-        CHECK(kret, "Getting non-existant entry");
-    }
+    CHECK_ERR(kret, KRB5_KT_NOTFOUND, "Getting non-existant entry");
 
     krb5_free_principal(context, princ);
 
@@ -339,9 +329,8 @@ kt_test(krb5_context context, const char *name)
     /* Try to lookup specified enctype and kvno  - that does not exist*/
 
     kret = krb5_kt_get_entry(context, kt, princ, 3, 1, &kent);
-    if(kret != KRB5_KT_KVNONOTFOUND) {
-        CHECK(kret, "looking up specific principal, kvno, enctype");
-    }
+    CHECK_ERR(kret, KRB5_KT_KVNONOTFOUND,
+              "looking up specific principal, kvno, enctype");
 
     krb5_free_principal(context, princ);
 
@@ -436,9 +425,7 @@ main(void)
     /* All keytab types are registered by default -- test for
        redundant error */
     kret = krb5_kt_register(context, &krb5_ktf_writable_ops);
-    if(kret && kret != KRB5_KT_TYPE_EXISTS) {
-        CHECK(kret, "register ktf_writable");
-    }
+    CHECK_ERR(kret, KRB5_KT_TYPE_EXISTS, "register ktf_writable");
 
     test_misc(context);
     do_test(context, "WRFILE:", FALSE);