TLS: Session resumption, under the EXPERIMENTAL_TLS_RESUME build option.

[exim.git] / src / src / dbfn.c

diff --git a/src/src/dbfn.c b/src/src/dbfn.c
index 29d9808028d4d6231b50d37c64586de28055f898..a607756819313cd69c5f1db34cce06a056cc7a37 100644 (file)
--- a/src/src/dbfn.c
+++ b/src/src/dbfn.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2017 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -72,6 +72,7 @@ Arguments:
   dbblock  Points to an open_db block to be filled in.
   lof      If TRUE, write to the log for actual open failures (locking failures
            are always logged).
+  panic           If TRUE, panic on failure to create the db directory
 
 Returns:   NULL if the open failed, or the locking failed. After locking
            failures, errno is zero.
@@ -85,7 +86,7 @@ moment I haven't changed them.
 */
 
 open_db *
-dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof)
+dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof, BOOL panic)
 {
 int rc, save_errno;
 BOOL read_only = flags == O_RDONLY;
@@ -93,6 +94,8 @@ BOOL created = FALSE;
 flock_t lock_data;
 uschar dirname[256], filename[256];
 
+DEBUG(D_hints_lookup) acl_level++;
+
 /* The first thing to do is to open a separate file on which to lock. This
 ensures that Exim has exclusive use of the database before it even tries to
 open it. Early versions tried to lock on the open database itself, but that
@@ -112,7 +115,7 @@ snprintf(CS filename, sizeof(filename), "%s/%s.lockfile", dirname, name);
 if ((dbblock->lockfd = Uopen(filename, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0)
   {
   created = TRUE;
-  (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, TRUE);
+  (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, panic);
   dbblock->lockfd = Uopen(filename, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE);
   }
 
@@ -121,6 +124,7 @@ if (dbblock->lockfd < 0)
   log_write(0, LOG_MAIN, "%s",
     string_open_failed(errno, "database lock file %s", filename));
   errno = 0;      /* Indicates locking failure */
+  DEBUG(D_hints_lookup) acl_level--;
   return NULL;
   }
 
@@ -131,12 +135,12 @@ lock_data.l_type = read_only? F_RDLCK : F_WRLCK;
 lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0;
 
 DEBUG(D_hints_lookup|D_retry|D_route|D_deliver)
-  debug_printf("locking %s\n", filename);
+  debug_printf_indent("locking %s\n", filename);
 
 sigalrm_seen = FALSE;
-alarm(EXIMDB_LOCK_TIMEOUT);
+ALARM(EXIMDB_LOCK_TIMEOUT);
 rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data);
-alarm(0);
+ALARM_CLR(0);
 
 if (sigalrm_seen) errno = ETIMEDOUT;
 if (rc < 0)
@@ -146,10 +150,11 @@ if (rc < 0)
     errno == ETIMEDOUT ? "timed out" : strerror(errno));
   (void)close(dbblock->lockfd);
   errno = 0;       /* Indicates locking failure */
+  DEBUG(D_hints_lookup) acl_level--;
   return NULL;
   }
 
-DEBUG(D_hints_lookup) debug_printf("locked  %s\n", filename);
+DEBUG(D_hints_lookup) debug_printf_indent("locked  %s\n", filename);
 
 /* At this point we have an opened and locked separate lock file, that is,
 exclusive access to the database, so we can go ahead and open it. If we are
@@ -166,7 +171,7 @@ EXIM_DBOPEN(filename, dirname, flags, EXIMDB_MODE, &(dbblock->dbptr));
 if (!dbblock->dbptr && errno == ENOENT && flags == O_RDWR)
   {
   DEBUG(D_hints_lookup)
-    debug_printf("%s appears not to exist: trying to create\n", filename);
+    debug_printf_indent("%s appears not to exist: trying to create\n", filename);
   created = TRUE;
   EXIM_DBOPEN(filename, dirname, flags|O_CREAT, EXIMDB_MODE, &(dbblock->dbptr));
   }
@@ -204,9 +209,9 @@ if (created && geteuid() == root_uid)
       Ustrcpy(lastname, ent->d_name);
       if (Ustat(filename, &statbuf) >= 0 && statbuf.st_uid != exim_uid)
         {
-        DEBUG(D_hints_lookup) debug_printf("ensuring %s is owned by exim\n", filename);
-        if (Uchown(filename, exim_uid, exim_gid))
-          DEBUG(D_hints_lookup) debug_printf("failed setting %s to owned by exim\n", filename);
+        DEBUG(D_hints_lookup) debug_printf_indent("ensuring %s is owned by exim\n", filename);
+        if (exim_chown(filename, exim_uid, exim_gid))
+          DEBUG(D_hints_lookup) debug_printf_indent("failed setting %s to owned by exim\n", filename);
         }
       }
 
@@ -224,15 +229,16 @@ if (!dbblock->dbptr)
         filename));
   else
     DEBUG(D_hints_lookup)
-      debug_printf("%s\n", CS string_open_failed(save_errno, "DB file %s",
+      debug_printf_indent("%s\n", CS string_open_failed(save_errno, "DB file %s",
           filename));
   (void)close(dbblock->lockfd);
   errno = save_errno;
+  DEBUG(D_hints_lookup) acl_level--;
   return NULL;
   }
 
 DEBUG(D_hints_lookup)
-  debug_printf("opened hints database %s: flags=%s\n", filename,
+  debug_printf_indent("opened hints database %s: flags=%s\n", filename,
     flags == O_RDONLY ? "O_RDONLY"
     : flags == O_RDWR ? "O_RDWR"
     : flags == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT"
@@ -263,7 +269,8 @@ dbfn_close(open_db *dbblock)
 {
 EXIM_DBCLOSE(dbblock->dbptr);
 (void)close(dbblock->lockfd);
-DEBUG(D_hints_lookup) debug_printf("closed hints database and lockfile\n");
+DEBUG(D_hints_lookup)
+  { debug_printf_indent("closed hints database and lockfile\n"); acl_level--; }
 }
 
 
@@ -300,7 +307,7 @@ uschar * key_copy = store_get(klen);
 
 memcpy(key_copy, key, klen);
 
-DEBUG(D_hints_lookup) debug_printf("dbfn_read: key=%s\n", key);
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_read: key=%s\n", key);
 
 EXIM_DATUM_INIT(key_datum);         /* Some DBM libraries require the datum */
 EXIM_DATUM_INIT(result_datum);      /* to be cleared before use. */
@@ -345,7 +352,7 @@ uschar * key_copy = store_get(klen);
 memcpy(key_copy, key, klen);
 gptr->time_stamp = time(NULL);
 
-DEBUG(D_hints_lookup) debug_printf("dbfn_write: key=%s\n", key);
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_write: key=%s\n", key);
 
 EXIM_DATUM_INIT(key_datum);         /* Some DBM libraries require the datum */
 EXIM_DATUM_INIT(value_datum);       /* to be cleared before use. */
@@ -376,6 +383,8 @@ dbfn_delete(open_db *dbblock, const uschar *key)
 int klen = Ustrlen(key) + 1;
 uschar * key_copy = store_get(klen);
 
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_delete: key=%s\n", key);
+
 memcpy(key_copy, key, klen);
 EXIM_DATUM key_datum;
 EXIM_DATUM_INIT(key_datum);         /* Some DBM libraries require clearing */
@@ -409,6 +418,8 @@ EXIM_DATUM key_datum, value_datum;
 uschar *yield;
 value_datum = value_datum;    /* dummy; not all db libraries use this */
 
+DEBUG(D_hints_lookup) debug_printf_indent("dbfn_scan\n");
+
 /* Some dbm require an initialization */
 
 if (start) EXIM_DBCREATE_CURSOR(dbblock->dbptr, cursor);
@@ -526,7 +537,7 @@ while (Ufgets(buffer, 256, stdin) != NULL)
       }
 
     start = clock();
-    odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE);
+    odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE, TRUE);
     stop = clock();
 
     if (odb)