Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 325 insertions, 0 deletions

diff --git a/src/postconf/postconf_dbms.c b/src/postconf/postconf_dbms.c
new file mode 100644
index 0000000..eddeab0
--- /dev/null
+++ b/src/postconf/postconf_dbms.c
@@ -0,0 +1,325 @@
+/*++
+/* NAME
+/*	postconf_dbms 3
+/* SUMMARY
+/*	legacy support for database-defined main.cf parameter names
+/* SYNOPSIS
+/*	#include <postconf.h>
+/*
+/*	void	pcf_register_dbms_parameters(param_value, flag_parameter,
+/*					local_scope)
+/*	const char *param_value;
+/*	const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *);
+/*	PCF_MASTER_ENT *local_scope;
+/* DESCRIPTION
+/*	This module implements legacy support for database configuration
+/*	where main.cf parameter names are generated by prepending
+/*	the database name to a database-defined suffix.
+/*
+/*	Arguments:
+/* .IP param_value
+/*	A parameter value to be searched for "type:table" strings.
+/*	When a database type is found that supports legacy-style
+/*	configuration, the table name is combined with each of the
+/*	database-defined suffixes to generate candidate parameter
+/*	names for that database type; if the table name specifies
+/*	a client configuration file, that file is scanned for unused
+/*	parameter settings.
+/* .IP flag_parameter
+/*	A function that takes as arguments a candidate parameter
+/*	name, parameter flags, and a PCF_MASTER_ENT pointer.  The
+/*	function will flag the parameter as "used" if it has a
+/*	"name=value" entry in the local or global namespace.
+/* .IP local_scope
+/*	The local namespace.
+/* DIAGNOSTICS
+/*	No explicit diagnostics.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <stringops.h>
+#include <split_at.h>
+#include <mac_expand.h>
+#include <dict.h>
+#include <msg.h>
+#include <mymalloc.h>
+
+/* Global library. */
+
+#include <mail_conf.h>
+#include <mail_params.h>
+#include <dict_ht.h>
+#include <dict_proxy.h>
+#include <dict_ldap.h>
+#include <dict_mysql.h>
+#include <dict_pgsql.h>
+#include <dict_sqlite.h>
+#include <dict_memcache.h>
+
+/* Application-specific. */
+
+#include <postconf.h>
+
+ /*
+  * SLMs.
+  */
+#define STR(x)	vstring_str(x)
+
+#ifdef LEGACY_DBMS_SUPPORT
+
+ /*
+  * The legacy database interface automagically instantiates a list of
+  * parameters by prepending the table name to database-specific suffixes.
+  */
+
+/* See ldap_table(5). */
+
+static const char *pcf_ldap_suffixes[] = {
+#include "pcf_ldap_suffixes.h"
+    0,
+};
+
+/* See mysql_table(5). */
+
+static const char *pcf_mysql_suffixes[] = {
+#include "pcf_mysql_suffixes.h"
+    0,
+};
+
+/* See pgsql_table(5). */
+
+static const char *pcf_pgsql_suffixes[] = {
+#include "pcf_pgsql_suffixes.h"
+    0,
+};
+
+/* See sqlite_table(5). */
+
+static const char *pcf_sqlite_suffixes[] = {
+#include "pcf_sqlite_suffixes.h"
+    0,
+};
+
+/* See memcache_table(5). */
+
+static const char *pcf_memcache_suffixes[] = {
+#include "pcf_memcache_suffixes.h"
+    0,
+};
+
+ /*
+  * Bundle up the database types and their suffix lists.
+  */
+typedef struct {
+    const char *db_type;
+    const char **db_suffixes;
+} PCF_DBMS_INFO;
+
+static const PCF_DBMS_INFO pcf_dbms_info[] = {
+    DICT_TYPE_LDAP, pcf_ldap_suffixes,
+    DICT_TYPE_MYSQL, pcf_mysql_suffixes,
+    DICT_TYPE_PGSQL, pcf_pgsql_suffixes,
+    DICT_TYPE_SQLITE, pcf_sqlite_suffixes,
+    DICT_TYPE_MEMCACHE, pcf_memcache_suffixes,
+    0,
+};
+
+/* pcf_check_dbms_client - look for unused names in client configuration */
+
+static void pcf_check_dbms_client(const PCF_DBMS_INFO *dp, const char *cf_file)
+{
+    DICT   *dict;
+    VSTREAM *fp;
+    const char **cpp;
+    const char *name;
+    const char *value;
+    char   *dict_spec;
+    int     dir;
+
+    /*
+     * We read each database client configuration file into its own
+     * dictionary, and nag only the first time that a file is visited.
+     */
+    dict_spec = concatenate(dp->db_type, ":", cf_file, (char *) 0);
+    if ((dict = dict_handle(dict_spec)) == 0) {
+	struct stat st;
+
+	/*
+	 * Populate the dictionary with settings in this database client
+	 * configuration file. Don't die if a file can't be opened - some
+	 * files may contain passwords and should not be world-readable.
+	 * Note: dict_load_fp() nags about duplicate pameter settings.
+	 */
+	dict = dict_ht_open(dict_spec, O_CREAT | O_RDWR, 0);
+	dict_register(dict_spec, dict);
+	if ((fp = vstream_fopen(cf_file, O_RDONLY, 0)) == 0) {
+	    if (errno != EACCES)
+		msg_warn("open \"%s\" configuration \"%s\": %m",
+			 dp->db_type, cf_file);
+	    myfree(dict_spec);
+	    return;
+	}
+	if (fstat(vstream_fileno(fp), &st) == 0 && !S_ISREG(st.st_mode)) {
+	    msg_warn("open \"%s\" configuration \"%s\": not a regular file",
+		     dp->db_type, cf_file);
+	    myfree(dict_spec);
+	    (void) vstream_fclose(fp);
+	    return;
+	}
+	dict_load_fp(dict_spec, fp);
+	if (vstream_fclose(fp)) {
+	    msg_warn("read \"%s\" configuration \"%s\": %m",
+		     dp->db_type, cf_file);
+	    myfree(dict_spec);
+	    return;
+	}
+
+	/*
+	 * Remove all known database client parameters from this dictionary,
+	 * then report the remaining ones as "unused". We use ad-hoc logging
+	 * code, because a database client parameter namespace is unlike the
+	 * parameter namespaces in main.cf or master.cf.
+	 */
+	for (cpp = dp->db_suffixes; *cpp; cpp++)
+	    (void) dict_del(dict, *cpp);
+	for (dir = DICT_SEQ_FUN_FIRST;
+	     dict->sequence(dict, dir, &name, &value) == DICT_STAT_SUCCESS;
+	     dir = DICT_SEQ_FUN_NEXT)
+	    msg_warn("%s: unused parameter: %s=%s", dict_spec, name, value);
+    }
+    myfree(dict_spec);
+}
+
+/* pcf_register_dbms_helper - parse one possible database type:name */
+
+static void pcf_register_dbms_helper(char *str_value,
+         const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *),
+				             PCF_MASTER_ENT *local_scope)
+{
+    const PCF_DBMS_INFO *dp;
+    char   *db_type;
+    char   *prefix;
+    static VSTRING *candidate = 0;
+    const char **cpp;
+    char   *err;
+
+    /*
+     * Naive parsing. We don't really know if this substring specifies a
+     * database or some other text.
+     */
+    while ((db_type = mystrtokq(&str_value, CHARS_COMMA_SP, CHARS_BRACE)) != 0) {
+
+	/*
+	 * Skip over "proxy:" maptypes, to emulate the proxymap(8) server's
+	 * behavior when opening a local database configuration file.
+	 */
+	while ((prefix = split_at(db_type, ':')) != 0
+	       && strcmp(db_type, DICT_TYPE_PROXY) == 0)
+	    db_type = prefix;
+
+	if (prefix == 0)
+	    continue;
+
+	/*
+	 * Look for database:prefix where the prefix is an absolute pathname.
+	 * Then, report unknown database client configuration parameters.
+	 * 
+	 * XXX What about a pathname beginning with '.'? This supposedly is
+	 * relative to the queue directory, which is the default directory
+	 * for all Postfix daemon processes. This would also have to handle
+	 * the case that the queue is not yet created.
+	 */
+	if (*prefix == '/') {
+	    for (dp = pcf_dbms_info; dp->db_type != 0; dp++) {
+		if (strcmp(db_type, dp->db_type) == 0) {
+		    pcf_check_dbms_client(dp, prefix);
+		    break;
+		}
+	    }
+	    continue;
+	}
+
+	/*
+	 * Look for database:prefix where the prefix is not a pathname and
+	 * the database is a known type. Synthesize candidate parameter names
+	 * from the user-defined prefix and from the database-defined suffix
+	 * list, and see if those parameters have a "name=value" entry in the
+	 * local or global namespace.
+	 */
+	if (*prefix != '.') {
+	    if (*prefix == CHARS_BRACE[0]) {
+		if ((err = extpar(&prefix, CHARS_BRACE, EXTPAR_FLAG_NONE)) != 0) {
+		    /* XXX Encapsulate this in pcf_warn() function. */
+		    if (local_scope)
+			msg_warn("%s:%s: %s",
+				 MASTER_CONF_FILE, local_scope->name_space,
+				 err);
+		    else
+			msg_warn("%s: %s", MAIN_CONF_FILE, err);
+		    myfree(err);
+		}
+		pcf_register_dbms_helper(prefix, flag_parameter,
+					 local_scope);
+	    } else {
+		for (dp = pcf_dbms_info; dp->db_type != 0; dp++) {
+		    if (strcmp(db_type, dp->db_type) == 0) {
+			for (cpp = dp->db_suffixes; *cpp; cpp++) {
+			    vstring_sprintf(candidate ? candidate :
+					    (candidate = vstring_alloc(30)),
+					    "%s_%s", prefix, *cpp);
+			    flag_parameter(STR(candidate),
+				  PCF_PARAM_FLAG_DBMS | PCF_PARAM_FLAG_USER,
+					   local_scope);
+			}
+			break;
+		    }
+		}
+	    }
+	}
+    }
+}
+
+/* pcf_register_dbms_parameters - look for database_type:prefix_name */
+
+void    pcf_register_dbms_parameters(const char *param_value,
+         const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *),
+				             PCF_MASTER_ENT *local_scope)
+{
+    char   *bufp;
+    static VSTRING *buffer = 0;
+
+    /*
+     * XXX This does not examine both sides of conditional macro expansion,
+     * and may expand the "wrong" conditional macros. This is the best we can
+     * do for legacy database configuration support.
+     */
+    if (buffer == 0)
+	buffer = vstring_alloc(100);
+    bufp = pcf_expand_parameter_value(buffer, PCF_SHOW_EVAL, param_value,
+				      local_scope);
+    pcf_register_dbms_helper(bufp, flag_parameter, local_scope);
+}
+
+#endif