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+/*++
+/* NAME
+/* postconf 3h
+/* SUMMARY
+/* module interfaces
+/* SYNOPSIS
+/* #include <postconf.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * System library.
+ */
+#include <unistd.h>
+
+ /*
+ * Utility library.
+ */
+#include <htable.h>
+#include <argv.h>
+#include <dict.h>
+#include <name_code.h>
+
+ /*
+ * What we're supposed to be doing.
+ */
+#define PCF_SHOW_NONDEF (1<<0) /* show main.cf non-default settings */
+#define PCF_SHOW_DEFS (1<<1) /* show main.cf default setting */
+#define PCF_HIDE_NAME (1<<2) /* hide main.cf parameter name */
+#define PCF_SHOW_MAPS (1<<3) /* show map types */
+#define PCF_EDIT_CONF (1<<4) /* edit main.cf or master.cf */
+#define PCF_SHOW_LOCKS (1<<5) /* show mailbox lock methods */
+#define PCF_SHOW_EVAL (1<<6) /* expand main.cf right-hand sides */
+#define PCF_SHOW_SASL_SERV (1<<7) /* show server auth plugin types */
+#define PCF_SHOW_SASL_CLNT (1<<8) /* show client auth plugin types */
+#define PCF_COMMENT_OUT (1<<9) /* #-out selected main.cf entries */
+#define PCF_MASTER_ENTRY (1<<10) /* manage master.cf entries */
+#define PCF_FOLD_LINE (1<<11) /* fold long *.cf entries */
+#define PCF_EDIT_EXCL (1<<12) /* exclude main.cf entries */
+#define PCF_MASTER_FLD (1<<13) /* hierarchical pathname */
+#define PCF_MAIN_PARAM (1<<14) /* manage main.cf entries */
+#define PCF_EXP_DSN_TEMPL (1<<15) /* expand bounce templates */
+#define PCF_PARAM_CLASS (1<<16) /* select parameter class */
+#define PCF_MAIN_OVER (1<<17) /* override parameter values */
+#define PCF_DUMP_DSN_TEMPL (1<<18) /* show bounce templates */
+#define PCF_MASTER_PARAM (1<<19) /* manage master.cf -o name=value */
+#define PCF_HIDE_VALUE (1<<20) /* hide main.cf/master.cf =value */
+#define PCF_SHOW_TLS (1<<21) /* TLS support introspection */
+
+#define PCF_DEF_MODE 0
+
+ /*
+ * Structure for one "valid parameter" (built-in, service-defined or valid
+ * user-defined). See the postconf_builtin, postconf_service and
+ * postconf_user modules for narrative text.
+ */
+typedef struct {
+ int flags; /* see below */
+ void *param_data; /* mostly, the default value */
+ const char *(*convert_fn) (void *); /* value to string */
+} PCF_PARAM_NODE;
+
+ /* Values for flags. See the postconf_node module for narrative text. */
+#define PCF_PARAM_FLAG_RAW (1<<0) /* raw parameter value */
+#define PCF_PARAM_FLAG_BUILTIN (1<<1) /* built-in parameter name */
+#define PCF_PARAM_FLAG_SERVICE (1<<2) /* service-defined parameter name */
+#define PCF_PARAM_FLAG_USER (1<<3) /* user-defined parameter name */
+#define PCF_PARAM_FLAG_LEGACY (1<<4) /* legacy parameter name */
+#define PCF_PARAM_FLAG_READONLY (1<<5) /* legacy parameter name */
+#define PCF_PARAM_FLAG_DBMS (1<<6) /* dbms-defined parameter name */
+
+#define PCF_PARAM_MASK_CLASS \
+ (PCF_PARAM_FLAG_BUILTIN | PCF_PARAM_FLAG_SERVICE | PCF_PARAM_FLAG_USER)
+#define PCF_PARAM_CLASS_OVERRIDE(node, class) \
+ ((node)->flags = (((node)->flags & ~PCF_PARAM_MASK_CLASS) | (class)))
+
+#define PCF_RAW_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_RAW)
+#define PCF_BUILTIN_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_BUILTIN)
+#define PCF_SERVICE_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_SERVICE)
+#define PCF_USER_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_USER)
+#define PCF_LEGACY_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_LEGACY)
+#define PCF_READONLY_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_READONLY)
+#define PCF_DBMS_PARAMETER(node) ((node)->flags & PCF_PARAM_FLAG_DBMS)
+
+ /* Values for param_data. See postconf_node module for narrative text. */
+#define PCF_PARAM_NO_DATA ((char *) 0)
+
+ /*
+ * Lookup table for global "valid parameter" information.
+ */
+#define PCF_PARAM_TABLE HTABLE
+#define PCF_PARAM_INFO HTABLE_INFO
+
+extern PCF_PARAM_TABLE *pcf_param_table;
+
+ /*
+ * postconf_node.c.
+ */
+#define PCF_PARAM_TABLE_CREATE(size) htable_create(size);
+#define PCF_PARAM_NODE_CAST(ptr) ((PCF_PARAM_NODE *) (ptr))
+
+#define PCF_PARAM_TABLE_LIST(table) htable_list(table)
+#define PCF_PARAM_INFO_NAME(ht) ((const char *) (ht)->key)
+#define PCF_PARAM_INFO_NODE(ht) PCF_PARAM_NODE_CAST((ht)->value)
+
+#define PCF_PARAM_TABLE_FIND(table, name) \
+ PCF_PARAM_NODE_CAST(htable_find((table), (name)))
+#define PCF_PARAM_TABLE_LOCATE(table, name) htable_locate((table), (name))
+#define PCF_PARAM_TABLE_ENTER(table, name, flags, data, func) \
+ htable_enter((table), (name), (char *) pcf_make_param_node((flags), \
+ (data), (func)))
+
+extern PCF_PARAM_NODE *pcf_make_param_node(int, void *, const char *(*) (void *));
+extern const char *pcf_convert_param_node(int, const char *, PCF_PARAM_NODE *);
+extern VSTRING *pcf_param_string_buf;
+
+ /*
+ * Structure of one master.cf entry.
+ */
+typedef struct {
+ char *name_space; /* service/type, parameter name space */
+ ARGV *argv; /* null, or master.cf fields */
+ DICT *all_params; /* null, or all name=value entries */
+ DICT *ro_params; /* read-only name=value entries */
+ HTABLE *valid_names; /* null, or "valid" parameter names */
+} PCF_MASTER_ENT;
+
+#define PCF_MASTER_MIN_FIELDS 8 /* mandatory field minimum */
+
+#define PCF_MASTER_NAME_SERVICE "service"
+#define PCF_MASTER_NAME_TYPE "type"
+#define PCF_MASTER_NAME_PRIVATE "private"
+#define PCF_MASTER_NAME_UNPRIV "unprivileged"
+#define PCF_MASTER_NAME_CHROOT "chroot"
+#define PCF_MASTER_NAME_WAKEUP "wakeup"
+#define PCF_MASTER_NAME_MAXPROC "process_limit"
+#define PCF_MASTER_NAME_CMD "command"
+
+#define PCF_MASTER_FLD_SERVICE 0 /* service name */
+#define PCF_MASTER_FLD_TYPE 1 /* service type */
+#define PCF_MASTER_FLD_PRIVATE 2 /* private service */
+#define PCF_MASTER_FLD_UNPRIV 3 /* unprivileged service */
+#define PCF_MASTER_FLD_CHROOT 4 /* chrooted service */
+#define PCF_MASTER_FLD_WAKEUP 5 /* wakeup timer */
+#define PCF_MASTER_FLD_MAXPROC 6 /* process limit */
+#define PCF_MASTER_FLD_CMD 7 /* command */
+
+#define PCF_MASTER_FLD_WILDC -1 /* wild-card */
+#define PCF_MASTER_FLD_NONE -2 /* not available */
+
+ /*
+ * Lookup table for master.cf entries. The table is terminated with an entry
+ * that has a null argv member.
+ */
+PCF_MASTER_ENT *pcf_master_table;
+
+ /*
+ * Line-wrapping support.
+ */
+#define PCF_LINE_LIMIT 80 /* try to fold longer lines */
+#define PCF_SEPARATORS " \t\r\n"
+#define PCF_INDENT_LEN 4 /* indent long text by 4 */
+#define PCF_INDENT_TEXT " "
+
+ /*
+ * XXX Global so that postconf_builtin.c call-backs can see it.
+ */
+extern int pcf_cmd_mode;
+
+ /*
+ * postconf_misc.c.
+ */
+extern void pcf_set_config_dir(void);
+
+ /*
+ * postconf_main.c
+ */
+extern void pcf_read_parameters(void);
+extern void pcf_set_parameters(char **);
+extern void pcf_show_parameters(VSTREAM *, int, int, char **);
+
+ /*
+ * postconf_edit.c
+ */
+extern void pcf_edit_main(int, int, char **);
+extern void pcf_edit_master(int, int, char **);
+
+ /*
+ * postconf_master.c.
+ */
+extern const char pcf_daemon_options_expecting_value[];
+extern void pcf_read_master(int);
+extern void pcf_show_master_entries(VSTREAM *, int, int, char **);
+extern const char *pcf_parse_master_entry(PCF_MASTER_ENT *, const char *);
+extern void pcf_print_master_entry(VSTREAM *, int, PCF_MASTER_ENT *);
+extern void pcf_free_master_entry(PCF_MASTER_ENT *);
+extern void pcf_show_master_fields(VSTREAM *, int, int, char **);
+extern void pcf_edit_master_field(PCF_MASTER_ENT *, int, const char *);
+extern void pcf_show_master_params(VSTREAM *, int, int, char **);
+extern void pcf_edit_master_param(PCF_MASTER_ENT *, int, const char *, const char *);
+
+#define PCF_WARN_ON_OPEN_ERROR 0
+#define PCF_FAIL_ON_OPEN_ERROR 1
+
+#define PCF_MASTER_BLANKS " \t\r\n" /* XXX */
+
+ /*
+ * Master.cf parameter namespace management. The idea is to manage master.cf
+ * "-o name=value" settings with other tools than text editors.
+ *
+ * The natural choice is to use "service-name.service-type.parameter-name", but
+ * unfortunately the '.' may appear in service and parameter names.
+ *
+ * For example, a spawn(8) listener can have a service name 127.0.0.1:10028.
+ * This service name becomes part of a service-dependent parameter name
+ * "127.0.0.1:10028_time_limit". All those '.' characters mean we can't use
+ * '.' as the parameter namespace delimiter.
+ *
+ * (We could require that such service names are specified as $foo:port with
+ * the value of "foo" defined in main.cf or at the top of master.cf.)
+ *
+ * But it is easier if we use '/' instead.
+ */
+#define PCF_NAMESP_SEP_CH '/'
+#define PCF_NAMESP_SEP_STR "/"
+
+#define PCF_LEGACY_SEP_CH '.'
+
+ /*
+ * postconf_match.c.
+ */
+#define PCF_MATCH_WILDC_STR "*"
+#define PCF_MATCH_ANY(p) ((p)[0] == PCF_MATCH_WILDC_STR[0] && (p)[1] == 0)
+#define PCF_MATCH_STRING(p, s) (PCF_MATCH_ANY(p) || strcmp((p), (s)) == 0)
+
+extern ARGV *pcf_parse_service_pattern(const char *, int, int);
+extern int pcf_parse_field_pattern(const char *);
+
+#define PCF_IS_MAGIC_SERVICE_PATTERN(pat) \
+ (PCF_MATCH_ANY((pat)->argv[0]) || PCF_MATCH_ANY((pat)->argv[1]))
+#define PCF_MATCH_SERVICE_PATTERN(pat, name, type) \
+ (PCF_MATCH_STRING((pat)->argv[0], (name)) \
+ && PCF_MATCH_STRING((pat)->argv[1], (type)))
+
+#define pcf_is_magic_field_pattern(pat) ((pat) == PCF_MASTER_FLD_WILDC)
+#define pcf_str_field_pattern(pat) ((const char *) (pcf_field_name_offset[pat].name))
+
+#define PCF_IS_MAGIC_PARAM_PATTERN(pat) PCF_MATCH_ANY(pat)
+#define PCF_MATCH_PARAM_PATTERN(pat, name) PCF_MATCH_STRING((pat), (name))
+
+/* The following is not part of the postconf_match API. */
+extern NAME_CODE pcf_field_name_offset[];
+
+ /*
+ * postconf_builtin.c.
+ */
+extern void pcf_register_builtin_parameters(const char *, pid_t);
+
+ /*
+ * postconf_service.c.
+ */
+extern void pcf_register_service_parameters(void);
+
+ /*
+ * Parameter context structure.
+ */
+typedef struct {
+ PCF_MASTER_ENT *local_scope;
+ int param_class;
+} PCF_PARAM_CTX;
+
+ /*
+ * postconf_user.c.
+ */
+extern void pcf_register_user_parameters(void);
+
+ /*
+ * postconf_dbms.c
+ */
+extern void pcf_register_dbms_parameters(const char *,
+ const char *(*) (const char *, int, PCF_MASTER_ENT *),
+ PCF_MASTER_ENT *);
+
+ /*
+ * postconf_lookup.c.
+ */
+extern const char *pcf_lookup_parameter_value(int, const char *,
+ PCF_MASTER_ENT *,
+ PCF_PARAM_NODE *);
+
+extern char *pcf_expand_parameter_value(VSTRING *, int, const char *,
+ PCF_MASTER_ENT *);
+
+ /*
+ * postconf_print.c.
+ */
+extern void PRINTFLIKE(3, 4) pcf_print_line(VSTREAM *, int, const char *,...);
+
+ /*
+ * postconf_unused.c.
+ */
+extern void pcf_flag_unused_main_parameters(void);
+extern void pcf_flag_unused_master_parameters(void);
+
+ /*
+ * postconf_other.c.
+ */
+extern void pcf_show_maps(void);
+extern void pcf_show_locks(void);
+extern void pcf_show_sasl(int);
+extern void pcf_show_tls(const char *);
+
+/* 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
+/*--*/