Adding upstream version 3.7.10.upstream/3.7.10

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

1 files changed, 1155 insertions, 0 deletions

diff --git a/src/postmap/postmap.c b/src/postmap/postmap.c
new file mode 100644
index 0000000..66421d0
--- /dev/null
+++ b/src/postmap/postmap.c
@@ -0,0 +1,1155 @@
+/*++
+/* NAME
+/*	postmap 1
+/* SUMMARY
+/*	Postfix lookup table management
+/* SYNOPSIS
+/* .fi
+/*	\fBpostmap\fR [\fB-bfFhimnNoprsuUvw\fR] [\fB-c \fIconfig_dir\fR]
+/*	[\fB-d \fIkey\fR] [\fB-q \fIkey\fR]
+/*		[\fIfile_type\fR:]\fIfile_name\fR ...
+/* DESCRIPTION
+/*	The \fBpostmap\fR(1) command creates or queries one or more Postfix
+/*	lookup tables, or updates an existing one.
+/*
+/*	If the result files do not exist they will be created with the
+/*	same group and other read permissions as their source file.
+/*
+/*	While the table update is in progress, signal delivery is
+/*	postponed, and an exclusive, advisory, lock is placed on the
+/*	entire table, in order to avoid surprises in spectator
+/*	processes.
+/* INPUT FILE FORMAT
+/* .ad
+/* .fi
+/*	The format of a lookup table input file is as follows:
+/* .IP \(bu
+/*	A table entry has the form
+/* .sp
+/* .nf
+/*	     \fIkey\fR whitespace \fIvalue\fR
+/* .fi
+/* .IP \(bu
+/*	Empty lines and whitespace-only lines are ignored, as
+/*	are lines whose first non-whitespace character is a `#'.
+/* .IP \(bu
+/*	A logical line starts with non-whitespace text. A line that
+/*	starts with whitespace continues a logical line.
+/* .PP
+/*	The \fIkey\fR and \fIvalue\fR are processed as is, except that
+/*	surrounding white space is stripped off. Whitespace in lookup
+/*	keys is supported in Postfix 3.2 and later, by surrounding the
+/*	key with double quote characters `"'. Within the double quotes,
+/*	double quote `"' and backslash `\\' characters can be included
+/*	by quoting them with a preceding backslash.
+/*
+/*	When the \fB-F\fR option is given, the \fIvalue\fR must
+/*	specify one or more filenames separated by comma and/or
+/*	whitespace; \fBpostmap\fR(1) will concatenate the file
+/*	content (with a newline character inserted between files)
+/*	and will store the base64-encoded result instead of the
+/*	\fIvalue\fR.
+/*
+/*	When the \fIkey\fR specifies email address information, the
+/*	localpart should be enclosed with double quotes if required
+/*	by RFC 5322. For example, an address localpart that contains
+/*	";", or a localpart that starts or ends with ".".
+/*
+/*	By default the lookup key is mapped to lowercase to make
+/*	the lookups case insensitive; as of Postfix 2.3 this case
+/*	folding happens only with tables whose lookup keys are
+/*	fixed-case strings such as btree:, dbm: or hash:. With
+/*	earlier versions, the lookup key is folded even with tables
+/*	where a lookup field can match both upper and lower case
+/*	text, such as regexp: and pcre:. This resulted in loss of
+/*	information with $\fInumber\fR substitutions.
+/* COMMAND-LINE ARGUMENTS
+/* .ad
+/* .fi
+/* .IP \fB-b\fR
+/*	Enable message body query mode. When reading lookup keys
+/*	from standard input with "\fB-q -\fR", process the input
+/*	as if it is an email message in RFC 5322 format.  Each line
+/*	of body content becomes one lookup key.
+/* .sp
+/*	By default, the \fB-b\fR option starts generating lookup
+/*	keys at the first non-header line, and stops when the end
+/*	of the message is reached.
+/*	To simulate \fBbody_checks\fR(5) processing, enable MIME
+/*	parsing with \fB-m\fR. With this, the \fB-b\fR option
+/*	generates no body-style lookup keys for attachment MIME
+/*	headers and for attached message/* headers.
+/* .sp
+/*	NOTE: with "smtputf8_enable = yes", the \fB-b\fR option
+/*	disables UTF-8 syntax checks on query keys and lookup
+/*	results. Specify the \fB-U\fR option to force UTF-8
+/*	syntax checks anyway.
+/* .sp
+/*	This feature is available in Postfix version 2.6 and later.
+/* .IP "\fB-c \fIconfig_dir\fR"
+/*	Read the \fBmain.cf\fR configuration file in the named directory
+/*	instead of the default configuration directory.
+/* .IP "\fB-d \fIkey\fR"
+/*	Search the specified maps for \fIkey\fR and remove one entry per map.
+/*	The exit status is zero when the requested information was found.
+/*
+/*	If a key value of \fB-\fR is specified, the program reads key
+/*	values from the standard input stream. The exit status is zero
+/*	when at least one of the requested keys was found.
+/* .IP \fB-f\fR
+/*	Do not fold the lookup key to lower case while creating or querying
+/*	a table.
+/*
+/*	With Postfix version 2.3 and later, this option has no
+/*	effect for regular expression tables. There, case folding
+/*	is controlled by appending a flag to a pattern.
+/* .IP \fB-F\fR
+/*	When querying a map, or listing a map, base64-decode each
+/*	value. When creating a map from source file, process each
+/*	value as a list of filenames, concatenate the content of
+/*	those files, and store the base64-encoded result instead
+/*	of the value (see INPUT FILE FORMAT for details).
+/* .sp
+/*	This feature is available in Postfix version 3.4 and later.
+/* .IP \fB-h\fR
+/*	Enable message header query mode. When reading lookup keys
+/*	from standard input with "\fB-q -\fR", process the input
+/*	as if it is an email message in RFC 5322 format.  Each
+/*	logical header line becomes one lookup key. A multi-line
+/*	header becomes one lookup key with one or more embedded
+/*	newline characters.
+/* .sp
+/*	By default, the \fB-h\fR option generates lookup keys until
+/*	the first non-header line is reached.
+/*	To simulate \fBheader_checks\fR(5) processing, enable MIME
+/*	parsing with \fB-m\fR. With this, the \fB-h\fR option also
+/*	generates header-style lookup keys for attachment MIME
+/*	headers and for attached message/* headers.
+/* .sp
+/*	NOTE: with "smtputf8_enable = yes", the \fB-b\fR option
+/*	option disables UTF-8 syntax checks on query keys and
+/*	lookup results. Specify the \fB-U\fR option to force UTF-8
+/*	syntax checks anyway.
+/* .sp
+/*	This feature is available in Postfix version 2.6 and later.
+/* .IP \fB-i\fR
+/*	Incremental mode. Read entries from standard input and do not
+/*	truncate an existing database. By default, \fBpostmap\fR(1) creates
+/*	a new database from the entries in \fBfile_name\fR.
+/* .IP \fB-m\fR
+/*	Enable MIME parsing with "\fB-b\fR" and "\fB-h\fR".
+/* .sp
+/*	This feature is available in Postfix version 2.6 and later.
+/* .IP \fB-N\fR
+/*	Include the terminating null character that terminates lookup keys
+/*	and values. By default, \fBpostmap\fR(1) does whatever is
+/*	the default for
+/*	the host operating system.
+/* .IP \fB-n\fR
+/*	Don't include the terminating null character that terminates lookup
+/*	keys and values. By default, \fBpostmap\fR(1) does whatever
+/*	is the default for
+/*	the host operating system.
+/* .IP \fB-o\fR
+/*	Do not release root privileges when processing a non-root
+/*	input file. By default, \fBpostmap\fR(1) drops root privileges
+/*	and runs as the source file owner instead.
+/* .IP \fB-p\fR
+/*	Do not inherit the file access permissions from the input file
+/*	when creating a new file.  Instead, create a new file with default
+/*	access permissions (mode 0644).
+/* .IP "\fB-q \fIkey\fR"
+/*	Search the specified maps for \fIkey\fR and write the first value
+/*	found to the standard output stream. The exit status is zero
+/*	when the requested information was found.
+/*
+/*	Note: this performs a single query with the key as specified,
+/*	and does not make iterative queries with substrings of the
+/*	key as described for access(5), canonical(5), transport(5),
+/*	virtual(5) and other Postfix table-driven features.
+/*
+/*	If a key value of \fB-\fR is specified, the program reads key
+/*	values from the standard input stream and writes one line of
+/*	\fIkey value\fR output for each key that was found. The exit
+/*	status is zero when at least one of the requested keys was found.
+/* .IP \fB-r\fR
+/*	When updating a table, do not complain about attempts to update
+/*	existing entries, and make those updates anyway.
+/* .IP \fB-s\fR
+/*	Retrieve all database elements, and write one line of
+/*	\fIkey value\fR output for each element. The elements are
+/*	printed in database order, which is not necessarily the same
+/*	as the original input order.
+/* .sp
+/*	This feature is available in Postfix version 2.2 and later,
+/*	and is not available for all database types.
+/* .IP \fB-u\fR
+/*	Disable UTF-8 support. UTF-8 support is enabled by default
+/*	when "smtputf8_enable = yes". It requires that keys and
+/*	values are valid UTF-8 strings.
+/* .IP \fB-U\fR
+/*	With "smtputf8_enable = yes", force UTF-8 syntax checks
+/*	with the \fB-b\fR and \fB-h\fR options.
+/* .IP \fB-v\fR
+/*	Enable verbose logging for debugging purposes. Multiple \fB-v\fR
+/*	options make the software increasingly verbose.
+/* .IP \fB-w\fR
+/*	When updating a table, do not complain about attempts to update
+/*	existing entries, and ignore those attempts.
+/* .PP
+/*	Arguments:
+/* .IP \fIfile_type\fR
+/*	The database type. To find out what types are supported, use
+/*	the "\fBpostconf -m\fR" command.
+/*
+/*	The \fBpostmap\fR(1) command can query any supported file type,
+/*	but it can create only the following file types:
+/* .RS
+/* .IP \fBbtree\fR
+/*	The output file is a btree file, named \fIfile_name\fB.db\fR.
+/*	This is available on systems with support for \fBdb\fR databases.
+/* .IP \fBcdb\fR
+/*	The output consists of one file, named \fIfile_name\fB.cdb\fR.
+/*	This is available on systems with support for \fBcdb\fR databases.
+/* .IP \fBdbm\fR
+/*	The output consists of two files, named \fIfile_name\fB.pag\fR and
+/*	\fIfile_name\fB.dir\fR.
+/*	This is available on systems with support for \fBdbm\fR databases.
+/* .IP \fBfail\fR
+/*	A table that reliably fails all requests. The lookup table
+/*	name is used for logging only. This table exists to simplify
+/*	Postfix error tests.
+/* .IP \fBhash\fR
+/*	The output file is a hashed file, named \fIfile_name\fB.db\fR.
+/*	This is available on systems with support for \fBdb\fR databases.
+/* .IP \fBlmdb\fR
+/*	The output is a btree-based file, named \fIfile_name\fB.lmdb\fR.
+/*	\fBlmdb\fR supports concurrent writes and reads from different
+/*	processes, unlike other supported file-based tables.
+/*	This is available on systems with support for \fBlmdb\fR databases.
+/* .IP \fBsdbm\fR
+/*	The output consists of two files, named \fIfile_name\fB.pag\fR and
+/*	\fIfile_name\fB.dir\fR.
+/*	This is available on systems with support for \fBsdbm\fR databases.
+/* .PP
+/*	When no \fIfile_type\fR is specified, the software uses the database
+/*	type specified via the \fBdefault_database_type\fR configuration
+/*	parameter.
+/* .RE
+/* .IP \fIfile_name\fR
+/*	The name of the lookup table source file when rebuilding a database.
+/* DIAGNOSTICS
+/*	Problems are logged to the standard error stream and to
+/*	\fBsyslogd\fR(8) or \fBpostlogd\fR(8).
+/*	No output means that no problems were detected. Duplicate entries are
+/*	skipped and are flagged with a warning.
+/*
+/*	\fBpostmap\fR(1) terminates with zero exit status in case of success
+/*	(including successful "\fBpostmap -q\fR" lookup) and terminates
+/*	with non-zero exit status in case of failure.
+/* ENVIRONMENT
+/* .ad
+/* .fi
+/* .IP \fBMAIL_CONFIG\fR
+/*	Directory with Postfix configuration files.
+/* .IP \fBMAIL_VERBOSE\fR
+/*	Enable verbose logging for debugging purposes.
+/* CONFIGURATION PARAMETERS
+/* .ad
+/* .fi
+/*	The following \fBmain.cf\fR parameters are especially relevant to
+/*	this program.
+/*	The text below provides only a parameter summary. See
+/*	\fBpostconf\fR(5) for more details including examples.
+/* .IP "\fBberkeley_db_create_buffer_size (16777216)\fR"
+/*	The per-table I/O buffer size for programs that create Berkeley DB
+/*	hash or btree tables.
+/* .IP "\fBberkeley_db_read_buffer_size (131072)\fR"
+/*	The per-table I/O buffer size for programs that read Berkeley DB
+/*	hash or btree tables.
+/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR"
+/*	The default location of the Postfix main.cf and master.cf
+/*	configuration files.
+/* .IP "\fBdefault_database_type (see 'postconf -d' output)\fR"
+/*	The default database type for use in \fBnewaliases\fR(1), \fBpostalias\fR(1)
+/*	and \fBpostmap\fR(1) commands.
+/* .IP "\fBimport_environment (see 'postconf -d' output)\fR"
+/*	The list of environment variables that a privileged Postfix
+/*	process will import from a non-Postfix parent process, or name=value
+/*	environment overrides.
+/* .IP "\fBsmtputf8_enable (yes)\fR"
+/*	Enable preliminary SMTPUTF8 support for the protocols described
+/*	in RFC 6531, RFC 6532, and RFC 6533.
+/* .IP "\fBsyslog_facility (mail)\fR"
+/*	The syslog facility of Postfix logging.
+/* .IP "\fBsyslog_name (see 'postconf -d' output)\fR"
+/*	A prefix that is prepended to the process name in syslog
+/*	records, so that, for example, "smtpd" becomes "prefix/smtpd".
+/* .PP
+/*	Available in Postfix 2.11 and later:
+/* .IP "\fBlmdb_map_size (16777216)\fR"
+/*	The initial OpenLDAP LMDB database size limit in bytes.
+/* SEE ALSO
+/*	postalias(1), create/update/query alias database
+/*	postconf(1), supported database types
+/*	postconf(5), configuration parameters
+/*	postlogd(8), Postfix logging
+/*	syslogd(8), system logging
+/* README FILES
+/* .ad
+/* .fi
+/*	Use "\fBpostconf readme_directory\fR" or
+/*	"\fBpostconf html_directory\fR" to locate this information.
+/* .na
+/* .nf
+/*	DATABASE_README, Postfix lookup table overview
+/* 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 <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <msg_vstream.h>
+#include <readlline.h>
+#include <stringops.h>
+#include <split_at.h>
+#include <vstring_vstream.h>
+#include <set_eugid.h>
+#include <warn_stat.h>
+#include <clean_env.h>
+
+/* Global library. */
+
+#include <mail_conf.h>
+#include <mail_dict.h>
+#include <mail_params.h>
+#include <mail_version.h>
+#include <mkmap.h>
+#include <mail_task.h>
+#include <dict_proxy.h>
+#include <mime_state.h>
+#include <rec_type.h>
+#include <mail_parm_split.h>
+#include <maillog_client.h>
+
+/* Application-specific. */
+
+#define STR	vstring_str
+#define LEN	VSTRING_LEN
+
+#define POSTMAP_FLAG_AS_OWNER	(1<<0)	/* open dest as owner of source */
+#define POSTMAP_FLAG_SAVE_PERM	(1<<1)	/* copy access permission from source */
+#define POSTMAP_FLAG_HEADER_KEY	(1<<2)	/* apply to header text */
+#define POSTMAP_FLAG_BODY_KEY	(1<<3)	/* apply to body text */
+#define POSTMAP_FLAG_MIME_KEY	(1<<4)	/* enable MIME parsing */
+
+#define POSTMAP_FLAG_HB_KEY (POSTMAP_FLAG_HEADER_KEY | POSTMAP_FLAG_BODY_KEY)
+#define POSTMAP_FLAG_FULL_KEY (POSTMAP_FLAG_BODY_KEY | POSTMAP_FLAG_MIME_KEY)
+#define POSTMAP_FLAG_ANY_KEY (POSTMAP_FLAG_HB_KEY | POSTMAP_FLAG_MIME_KEY)
+
+ /*
+  * MIME Engine call-back state for generating lookup keys from an email
+  * message read from standard input.
+  */
+typedef struct {
+    DICT  **dicts;			/* map handles */
+    char  **maps;			/* map names */
+    int     map_count;			/* yes, indeed */
+    int     dict_flags;			/* query flags */
+    int     header_done;		/* past primary header */
+    int     found;			/* result */
+} POSTMAP_KEY_STATE;
+
+/* postmap - create or update mapping database */
+
+static void postmap(char *map_type, char *path_name, int postmap_flags,
+		            int open_flags, int dict_flags)
+{
+    VSTREAM *NOCLOBBER source_fp;
+    VSTRING *line_buffer;
+    MKMAP  *mkmap;
+    int     lineno;
+    int     last_line;
+    char   *key;
+    char   *value;
+    struct stat st;
+    mode_t  saved_mask;
+
+    /*
+     * Initialize.
+     */
+    line_buffer = vstring_alloc(100);
+    if ((open_flags & O_TRUNC) == 0) {
+	/* Incremental mode. */
+	source_fp = VSTREAM_IN;
+	vstream_control(source_fp, CA_VSTREAM_CTL_PATH("stdin"), CA_VSTREAM_CTL_END);
+    } else {
+	/* Create database. */
+	if (strcmp(map_type, DICT_TYPE_PROXY) == 0)
+	    msg_fatal("can't create maps via the proxy service");
+	dict_flags |= DICT_FLAG_BULK_UPDATE;
+	if ((source_fp = vstream_fopen(path_name, O_RDONLY, 0)) == 0)
+	    msg_fatal("open %s: %m", path_name);
+    }
+    if (fstat(vstream_fileno(source_fp), &st) < 0)
+	msg_fatal("fstat %s: %m", path_name);
+
+    /*
+     * Turn off group/other read permissions as indicated in the source file.
+     */
+    if ((postmap_flags & POSTMAP_FLAG_SAVE_PERM) && S_ISREG(st.st_mode))
+	saved_mask = umask(022 | (~st.st_mode & 077));
+
+    /*
+     * If running as root, run as the owner of the source file, so that the
+     * result shows proper ownership, and so that a bug in postmap does not
+     * allow privilege escalation.
+     */
+    if ((postmap_flags & POSTMAP_FLAG_AS_OWNER) && getuid() == 0
+	&& (st.st_uid != geteuid() || st.st_gid != getegid()))
+	set_eugid(st.st_uid, st.st_gid);
+
+    /*
+     * Open the database, optionally create it when it does not exist,
+     * optionally truncate it when it does exist, and lock out any
+     * spectators.
+     */
+    mkmap = mkmap_open(map_type, path_name, open_flags, dict_flags);
+
+    /*
+     * And restore the umask, in case it matters.
+     */
+    if ((postmap_flags & POSTMAP_FLAG_SAVE_PERM) && S_ISREG(st.st_mode))
+	umask(saved_mask);
+
+    /*
+     * Trap "exceptions" so that we can restart a bulk-mode update after a
+     * recoverable error.
+     */
+    for (;;) {
+	if (dict_isjmp(mkmap->dict) != 0
+	    && dict_setjmp(mkmap->dict) != 0
+	    && vstream_fseek(source_fp, SEEK_SET, 0) < 0)
+	    msg_fatal("seek %s: %m", VSTREAM_PATH(source_fp));
+
+	/*
+	 * Add records to the database. XXX This duplicates the parser in
+	 * dict_thash.c.
+	 */
+	last_line = 0;
+	while (readllines(line_buffer, source_fp, &last_line, &lineno)) {
+	    int     in_quotes = 0;
+
+	    /*
+	     * First some UTF-8 checks sans casefolding.
+	     */
+	    if ((mkmap->dict->flags & DICT_FLAG_UTF8_ACTIVE)
+		&& !allascii(STR(line_buffer))
+		&& !valid_utf8_string(STR(line_buffer), LEN(line_buffer))) {
+		msg_warn("%s, line %d: non-UTF-8 input \"%s\""
+			 " -- ignoring this line",
+			 VSTREAM_PATH(source_fp), lineno, STR(line_buffer));
+		continue;
+	    }
+
+	    /*
+	     * Terminate the key on the first unquoted whitespace character,
+	     * then trim leading and trailing whitespace from the value.
+	     */
+	    for (value = STR(line_buffer); *value; value++) {
+		if (*value == '\\') {
+		    if (*++value == 0)
+			break;
+		} else if (ISSPACE(*value)) {
+		    if (!in_quotes)
+			break;
+		} else if (*value == '"') {
+		    in_quotes = !in_quotes;
+		}
+	    }
+	    if (in_quotes) {
+		msg_warn("%s, line %d: unbalanced '\"' in '%s'"
+			 " -- ignoring this line",
+			 VSTREAM_PATH(source_fp), lineno, STR(line_buffer));
+		continue;
+	    }
+	    if (*value)
+		*value++ = 0;
+	    while (ISSPACE(*value))
+		value++;
+	    trimblanks(value, 0)[0] = 0;
+
+	    /*
+	     * Leave the key in quoted form, because 1) postmap cannot assume
+	     * that a string without @ contains an email address localpart,
+	     * and 2) an address localpart may require quoting even when the
+	     * quoted form contains no backslash or ".
+	     */
+	    key = STR(line_buffer);
+
+	    /*
+	     * Enforce the "key whitespace value" format. Disallow missing
+	     * keys or missing values.
+	     */
+	    if (*key == 0 || *value == 0) {
+		msg_warn("%s, line %d: expected format: key whitespace value",
+			 VSTREAM_PATH(source_fp), lineno);
+		continue;
+	    }
+	    if (key[strlen(key) - 1] == ':')
+		msg_warn("%s, line %d: record is in \"key: value\" format; is this an alias file?",
+			 VSTREAM_PATH(source_fp), lineno);
+
+	    /*
+	     * Optionally treat the vale as a filename, and replace the value
+	     * with the BASE64-encoded content of the named file.
+	     */
+	    if (dict_flags & DICT_FLAG_SRC_RHS_IS_FILE) {
+		VSTRING *base64_buf;
+		char   *err;
+
+		if ((base64_buf = dict_file_to_b64(mkmap->dict, value)) == 0) {
+		    err = dict_file_get_error(mkmap->dict);
+		    msg_warn("%s, line %d: %s: skipping this entry",
+			     VSTREAM_PATH(source_fp), lineno, err);
+		    myfree(err);
+		    continue;
+		}
+		value = vstring_str(base64_buf);
+	    }
+
+	    /*
+	     * Store the value under a (possibly case-insensitive) key, as
+	     * specified with open_flags.
+	     */
+	    mkmap_append(mkmap, key, value);
+	    if (mkmap->dict->error)
+		msg_fatal("table %s:%s: write error: %m",
+			  mkmap->dict->type, mkmap->dict->name);
+	}
+	break;
+    }
+
+    /*
+     * Close the mapping database, and release the lock.
+     */
+    mkmap_close(mkmap);
+
+    /*
+     * Cleanup. We're about to terminate, but it is a good sanity check.
+     */
+    vstring_free(line_buffer);
+    if (source_fp != VSTREAM_IN)
+	vstream_fclose(source_fp);
+}
+
+/* postmap_body - MIME engine body call-back routine */
+
+static void postmap_body(void *ptr, int unused_rec_type,
+			         const char *keybuf,
+			         ssize_t unused_len,
+			         off_t unused_offset)
+{
+    POSTMAP_KEY_STATE *state = (POSTMAP_KEY_STATE *) ptr;
+    DICT  **dicts = state->dicts;
+    char  **maps = state->maps;
+    int     map_count = state->map_count;
+    int     dict_flags = state->dict_flags;
+    const char *map_name;
+    const char *value;
+    int     n;
+
+    for (n = 0; n < map_count; n++) {
+	if (dicts[n] == 0)
+	    dicts[n] = ((map_name = split_at(maps[n], ':')) != 0 ?
+			dict_open3(maps[n], map_name, O_RDONLY, dict_flags) :
+		    dict_open3(var_db_type, maps[n], O_RDONLY, dict_flags));
+	if ((value = dict_get(dicts[n], keybuf)) != 0) {
+	    if (*value == 0) {
+		msg_warn("table %s:%s: key %s: empty string result is not allowed",
+			 dicts[n]->type, dicts[n]->name, keybuf);
+		msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND",
+			 dicts[n]->type, dicts[n]->name);
+	    }
+	    vstream_printf("%s	%s\n", keybuf, value);
+	    state->found = 1;
+	    break;
+	}
+	if (dicts[n]->error)
+	    msg_fatal("table %s:%s: query error: %m",
+		      dicts[n]->type, dicts[n]->name);
+    }
+}
+
+/* postmap_header - MIME engine header call-back routine */
+
+static void postmap_header(void *ptr, int unused_header_class,
+			           const HEADER_OPTS *unused_header_info,
+			           VSTRING *header_buf,
+			           off_t offset)
+{
+
+    /*
+     * Don't re-invent an already working wheel.
+     */
+    postmap_body(ptr, 0, STR(header_buf), LEN(header_buf), offset);
+}
+
+/* postmap_head_end - MIME engine end-of-header call-back routine */
+
+static void postmap_head_end(void *ptr)
+{
+    POSTMAP_KEY_STATE *state = (POSTMAP_KEY_STATE *) ptr;
+
+    /*
+     * Don't process the message body when we only examine primary headers.
+     */
+    state->header_done = 1;
+}
+
+/* postmap_queries - apply multiple requests from stdin */
+
+static int postmap_queries(VSTREAM *in, char **maps, const int map_count,
+			           const int postmap_flags,
+			           const int dict_flags)
+{
+    int     found = 0;
+    VSTRING *keybuf = vstring_alloc(100);
+    DICT  **dicts;
+    const char *map_name;
+    const char *value;
+    int     n;
+
+    /*
+     * Sanity check.
+     */
+    if (map_count <= 0)
+	msg_panic("postmap_queries: bad map count");
+
+    /*
+     * Prepare to open maps lazily.
+     */
+    dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count);
+    for (n = 0; n < map_count; n++)
+	dicts[n] = 0;
+
+    /*
+     * Perform all queries. Open maps on the fly, to avoid opening unnecessary
+     * maps.
+     */
+    if ((postmap_flags & POSTMAP_FLAG_HB_KEY) == 0) {
+	while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) {
+	    for (n = 0; n < map_count; n++) {
+		if (dicts[n] == 0)
+		    dicts[n] = ((map_name = split_at(maps[n], ':')) != 0 ?
+		       dict_open3(maps[n], map_name, O_RDONLY, dict_flags) :
+		    dict_open3(var_db_type, maps[n], O_RDONLY, dict_flags));
+		value = ((dict_flags & DICT_FLAG_SRC_RHS_IS_FILE) ?
+			 dict_file_lookup : dicts[n]->lookup)
+		    (dicts[n], STR(keybuf));
+		if (value != 0) {
+		    if (*value == 0) {
+			msg_warn("table %s:%s: key %s: empty string result is not allowed",
+			       dicts[n]->type, dicts[n]->name, STR(keybuf));
+			msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND",
+				 dicts[n]->type, dicts[n]->name);
+		    }
+		    vstream_printf("%s	%s\n", STR(keybuf), value);
+		    found = 1;
+		    break;
+		}
+		switch (dicts[n]->error) {
+		case 0:
+		    break;
+		case DICT_ERR_CONFIG:
+		    msg_fatal("table %s:%s: query error",
+			      dicts[n]->type, dicts[n]->name);
+		default:
+		    msg_fatal("table %s:%s: query error: %m",
+			      dicts[n]->type, dicts[n]->name);
+		}
+	    }
+	}
+    } else {
+	POSTMAP_KEY_STATE key_state;
+	MIME_STATE *mime_state;
+	int     mime_errs = 0;
+
+	/*
+	 * Bundle up the request and instantiate a MIME parsing engine.
+	 */
+	key_state.dicts = dicts;
+	key_state.maps = maps;
+	key_state.map_count = map_count;
+	key_state.dict_flags = dict_flags;
+	key_state.header_done = 0;
+	key_state.found = 0;
+	mime_state =
+	    mime_state_alloc((postmap_flags & POSTMAP_FLAG_MIME_KEY) ?
+			     0 : MIME_OPT_DISABLE_MIME,
+			     (postmap_flags & POSTMAP_FLAG_HEADER_KEY) ?
+			     postmap_header : (MIME_STATE_HEAD_OUT) 0,
+			     (postmap_flags & POSTMAP_FLAG_FULL_KEY) ?
+			     (MIME_STATE_ANY_END) 0 : postmap_head_end,
+			     (postmap_flags & POSTMAP_FLAG_BODY_KEY) ?
+			     postmap_body : (MIME_STATE_BODY_OUT) 0,
+			     (MIME_STATE_ANY_END) 0,
+			     (MIME_STATE_ERR_PRINT) 0,
+			     (void *) &key_state);
+
+	/*
+	 * Process the input message.
+	 */
+	while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF
+	       && key_state.header_done == 0 && mime_errs == 0)
+	    mime_errs = mime_state_update(mime_state, REC_TYPE_NORM,
+					  STR(keybuf), LEN(keybuf));
+
+	/*
+	 * Flush the MIME engine output buffer and tidy up loose ends.
+	 */
+	if (mime_errs == 0)
+	    mime_errs = mime_state_update(mime_state, REC_TYPE_END, "", 0);
+	if (mime_errs)
+	    msg_fatal("message format error: %s",
+		      mime_state_detail(mime_errs)->text);
+	mime_state_free(mime_state);
+	found = key_state.found;
+    }
+
+    if (found)
+	vstream_fflush(VSTREAM_OUT);
+
+    /*
+     * Cleanup.
+     */
+    for (n = 0; n < map_count; n++)
+	if (dicts[n])
+	    dict_close(dicts[n]);
+    myfree((void *) dicts);
+    vstring_free(keybuf);
+
+    return (found);
+}
+
+/* postmap_query - query a map and print the result to stdout */
+
+static int postmap_query(const char *map_type, const char *map_name,
+			         const char *key, int dict_flags)
+{
+    DICT   *dict;
+    const char *value;
+
+    dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags);
+    value = ((dict_flags & DICT_FLAG_SRC_RHS_IS_FILE) ?
+	     dict_file_lookup : dict->lookup) (dict, key);
+    if (value != 0) {
+	if (*value == 0) {
+	    msg_warn("table %s:%s: key %s: empty string result is not allowed",
+		     map_type, map_name, key);
+	    msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND",
+		     map_type, map_name);
+	}
+	vstream_printf("%s\n", value);
+    }
+    switch (dict->error) {
+    case 0:
+	break;
+    case DICT_ERR_CONFIG:
+	msg_fatal("table %s:%s: query error",
+		  dict->type, dict->name);
+    default:
+	msg_fatal("table %s:%s: query error: %m",
+		  dict->type, dict->name);
+    }
+    vstream_fflush(VSTREAM_OUT);
+    dict_close(dict);
+    return (value != 0);
+}
+
+/* postmap_deletes - apply multiple requests from stdin */
+
+static int postmap_deletes(VSTREAM *in, char **maps, const int map_count,
+			           int dict_flags)
+{
+    int     found = 0;
+    VSTRING *keybuf = vstring_alloc(100);
+    DICT  **dicts;
+    const char *map_name;
+    int     n;
+    int     open_flags;
+
+    /*
+     * Sanity check.
+     */
+    if (map_count <= 0)
+	msg_panic("postmap_deletes: bad map count");
+
+    /*
+     * Open maps ahead of time.
+     */
+    dicts = (DICT **) mymalloc(sizeof(*dicts) * map_count);
+    for (n = 0; n < map_count; n++) {
+	map_name = split_at(maps[n], ':');
+	if (map_name && strcmp(maps[n], DICT_TYPE_PROXY) == 0)
+	    open_flags = O_RDWR | O_CREAT;	/* XXX */
+	else
+	    open_flags = O_RDWR;
+	dicts[n] = (map_name != 0 ?
+		    dict_open3(maps[n], map_name, open_flags, dict_flags) :
+		  dict_open3(var_db_type, maps[n], open_flags, dict_flags));
+    }
+
+    /*
+     * Perform all requests.
+     */
+    while (vstring_get_nonl(keybuf, in) != VSTREAM_EOF) {
+	for (n = 0; n < map_count; n++) {
+	    found |= (dict_del(dicts[n], STR(keybuf)) == 0);
+	    if (dicts[n]->error)
+		msg_fatal("table %s:%s: delete error: %m",
+			  dicts[n]->type, dicts[n]->name);
+	}
+    }
+
+    /*
+     * Cleanup.
+     */
+    for (n = 0; n < map_count; n++)
+	if (dicts[n])
+	    dict_close(dicts[n]);
+    myfree((void *) dicts);
+    vstring_free(keybuf);
+
+    return (found);
+}
+
+/* postmap_delete - delete a (key, value) pair from a map */
+
+static int postmap_delete(const char *map_type, const char *map_name,
+			          const char *key, int dict_flags)
+{
+    DICT   *dict;
+    int     status;
+    int     open_flags;
+
+    if (strcmp(map_type, DICT_TYPE_PROXY) == 0)
+	open_flags = O_RDWR | O_CREAT;		/* XXX */
+    else
+	open_flags = O_RDWR;
+    dict = dict_open3(map_type, map_name, open_flags, dict_flags);
+    status = dict_del(dict, key);
+    if (dict->error)
+	msg_fatal("table %s:%s: delete error: %m", dict->type, dict->name);
+    dict_close(dict);
+    return (status == 0);
+}
+
+/* postmap_seq - print all map entries to stdout */
+
+static void postmap_seq(const char *map_type, const char *map_name,
+			        int dict_flags)
+{
+    DICT   *dict;
+    const char *key;
+    const char *value;
+    int     func;
+
+    if (strcmp(map_type, DICT_TYPE_PROXY) == 0)
+	msg_fatal("can't sequence maps via the proxy service");
+    dict = dict_open3(map_type, map_name, O_RDONLY, dict_flags);
+    for (func = DICT_SEQ_FUN_FIRST; /* void */ ; func = DICT_SEQ_FUN_NEXT) {
+	if (dict_seq(dict, func, &key, &value) != 0)
+	    break;
+	if (*key == 0) {
+	    msg_warn("table %s:%s: empty lookup key value is not allowed",
+		     map_type, map_name);
+	} else if (*value == 0) {
+	    msg_warn("table %s:%s: key %s: empty string result is not allowed",
+		     map_type, map_name, key);
+	    msg_warn("table %s:%s should return NO RESULT in case of NOT FOUND",
+		     map_type, map_name);
+	}
+	if (dict_flags & DICT_FLAG_SRC_RHS_IS_FILE) {
+	    VSTRING *unb64;
+	    char   *err;
+
+	    if ((unb64 = dict_file_from_b64(dict, value)) == 0) {
+		err = dict_file_get_error(dict);
+		msg_warn("table %s:%s: key %s: %s",
+			 dict->type, dict->name, key, err);
+		myfree(err);
+		/* dict->error = DICT_ERR_CONFIG; */
+		continue;
+	    }
+	    value = STR(unb64);
+	}
+	vstream_printf("%s	%s\n", key, value);
+    }
+    if (dict->error)
+	msg_fatal("table %s:%s: sequence error: %m", dict->type, dict->name);
+    vstream_fflush(VSTREAM_OUT);
+    dict_close(dict);
+}
+
+/* usage - explain */
+
+static NORETURN usage(char *myname)
+{
+    msg_fatal("usage: %s [-bfFhimnNoprsuUvw] [-c config_dir] [-d key] [-q key] [map_type:]file...",
+	      myname);
+}
+
+MAIL_VERSION_STAMP_DECLARE;
+
+int     main(int argc, char **argv)
+{
+    char   *path_name;
+    int     ch;
+    int     fd;
+    char   *slash;
+    struct stat st;
+    int     postmap_flags = POSTMAP_FLAG_AS_OWNER | POSTMAP_FLAG_SAVE_PERM;
+    int     open_flags = O_RDWR | O_CREAT | O_TRUNC;
+    int     dict_flags = (DICT_FLAG_DUP_WARN | DICT_FLAG_FOLD_FIX
+			  | DICT_FLAG_UTF8_REQUEST);
+    char   *query = 0;
+    char   *delkey = 0;
+    int     sequence = 0;
+    int     found;
+    int     force_utf8 = 0;
+    ARGV   *import_env;
+
+    /*
+     * Fingerprint executables and core dumps.
+     */
+    MAIL_VERSION_STAMP_ALLOCATE;
+
+    /*
+     * Be consistent with file permissions.
+     */
+    umask(022);
+
+    /*
+     * To minimize confusion, make sure that the standard file descriptors
+     * are open before opening anything else. XXX Work around for 44BSD where
+     * fstat can return EBADF on an open file descriptor.
+     */
+    for (fd = 0; fd < 3; fd++)
+	if (fstat(fd, &st) == -1
+	    && (close(fd), open("/dev/null", O_RDWR, 0)) != fd)
+	    msg_fatal("open /dev/null: %m");
+
+    /*
+     * Process environment options as early as we can. We are not set-uid,
+     * and we are supposed to be running in a controlled environment.
+     */
+    if (getenv(CONF_ENV_VERB))
+	msg_verbose = 1;
+
+    /*
+     * Initialize. Set up logging. Read the global configuration file after
+     * parsing command-line arguments.
+     */
+    if ((slash = strrchr(argv[0], '/')) != 0 && slash[1])
+	argv[0] = slash + 1;
+    msg_vstream_init(argv[0], VSTREAM_ERR);
+    maillog_client_init(mail_task(argv[0]), MAILLOG_CLIENT_FLAG_NONE);
+
+    /*
+     * Check the Postfix library version as soon as we enable logging.
+     */
+    MAIL_VERSION_CHECK;
+
+    /*
+     * Parse JCL.
+     */
+    while ((ch = GETOPT(argc, argv, "bc:d:fFhimnNopq:rsuUvw")) > 0) {
+	switch (ch) {
+	default:
+	    usage(argv[0]);
+	    break;
+	case 'N':
+	    dict_flags |= DICT_FLAG_TRY1NULL;
+	    dict_flags &= ~DICT_FLAG_TRY0NULL;
+	    break;
+	case 'b':
+	    postmap_flags |= POSTMAP_FLAG_BODY_KEY;
+	    break;
+	case 'c':
+	    if (setenv(CONF_ENV_PATH, optarg, 1) < 0)
+		msg_fatal("out of memory");
+	    break;
+	case 'd':
+	    if (sequence || query || delkey)
+		msg_fatal("specify only one of -s -q or -d");
+	    delkey = optarg;
+	    break;
+	case 'f':
+	    dict_flags &= ~DICT_FLAG_FOLD_FIX;
+	    break;
+	case 'F':
+	    dict_flags |= DICT_FLAG_SRC_RHS_IS_FILE;
+	    break;
+	case 'h':
+	    postmap_flags |= POSTMAP_FLAG_HEADER_KEY;
+	    break;
+	case 'i':
+	    open_flags &= ~O_TRUNC;
+	    break;
+	case 'm':
+	    postmap_flags |= POSTMAP_FLAG_MIME_KEY;
+	    break;
+	case 'n':
+	    dict_flags |= DICT_FLAG_TRY0NULL;
+	    dict_flags &= ~DICT_FLAG_TRY1NULL;
+	    break;
+	case 'o':
+	    postmap_flags &= ~POSTMAP_FLAG_AS_OWNER;
+	    break;
+	case 'p':
+	    postmap_flags &= ~POSTMAP_FLAG_SAVE_PERM;
+	    break;
+	case 'q':
+	    if (sequence || query || delkey)
+		msg_fatal("specify only one of -s -q or -d");
+	    query = optarg;
+	    break;
+	case 'r':
+	    dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_IGNORE);
+	    dict_flags |= DICT_FLAG_DUP_REPLACE;
+	    break;
+	case 's':
+	    if (query || delkey)
+		msg_fatal("specify only one of -s or -q or -d");
+	    sequence = 1;
+	    break;
+	case 'u':
+	    dict_flags &= ~DICT_FLAG_UTF8_REQUEST;
+	    break;
+	case 'U':
+	    force_utf8 = 1;
+	    break;
+	case 'v':
+	    msg_verbose++;
+	    break;
+	case 'w':
+	    dict_flags &= ~(DICT_FLAG_DUP_WARN | DICT_FLAG_DUP_REPLACE);
+	    dict_flags |= DICT_FLAG_DUP_IGNORE;
+	    break;
+	}
+    }
+    mail_conf_read();
+    /* Enforce consistent operation of different Postfix parts. */
+    import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ);
+    update_env(import_env->argv);
+    argv_free(import_env);
+    /* Re-evaluate mail_task() after reading main.cf. */
+    maillog_client_init(mail_task(argv[0]), MAILLOG_CLIENT_FLAG_NONE);
+    mail_dict_init();
+    if ((query == 0 || strcmp(query, "-") != 0)
+	&& (postmap_flags & POSTMAP_FLAG_ANY_KEY))
+	msg_fatal("specify -b -h or -m only with \"-q -\"");
+    if ((postmap_flags & POSTMAP_FLAG_ANY_KEY) != 0
+	&& (postmap_flags & POSTMAP_FLAG_ANY_KEY)
+	== (postmap_flags & POSTMAP_FLAG_MIME_KEY))
+	msg_warn("ignoring -m option without -b or -h");
+    if ((postmap_flags & (POSTMAP_FLAG_ANY_KEY & ~POSTMAP_FLAG_MIME_KEY))
+	&& force_utf8 == 0)
+	dict_flags &= ~DICT_FLAG_UTF8_MASK;
+
+    /*
+     * Use the map type specified by the user, or fall back to a default
+     * database type.
+     */
+    if (delkey) {				/* remove entry */
+	if (optind + 1 > argc)
+	    usage(argv[0]);
+	if (strcmp(delkey, "-") == 0)
+	    exit(postmap_deletes(VSTREAM_IN, argv + optind, argc - optind,
+				 dict_flags | DICT_FLAG_LOCK) == 0);
+	found = 0;
+	while (optind < argc) {
+	    if ((path_name = split_at(argv[optind], ':')) != 0) {
+		found |= postmap_delete(argv[optind], path_name, delkey,
+					dict_flags | DICT_FLAG_LOCK);
+	    } else {
+		found |= postmap_delete(var_db_type, argv[optind], delkey,
+					dict_flags | DICT_FLAG_LOCK);
+	    }
+	    optind++;
+	}
+	exit(found ? 0 : 1);
+    } else if (query) {				/* query map(s) */
+	if (optind + 1 > argc)
+	    usage(argv[0]);
+	if (strcmp(query, "-") == 0)
+	    exit(postmap_queries(VSTREAM_IN, argv + optind, argc - optind,
+			  postmap_flags, dict_flags | DICT_FLAG_LOCK) == 0);
+	while (optind < argc) {
+	    if ((path_name = split_at(argv[optind], ':')) != 0) {
+		found = postmap_query(argv[optind], path_name, query,
+				      dict_flags | DICT_FLAG_LOCK);
+	    } else {
+		found = postmap_query(var_db_type, argv[optind], query,
+				      dict_flags | DICT_FLAG_LOCK);
+	    }
+	    if (found)
+		exit(0);
+	    optind++;
+	}
+	exit(1);
+    } else if (sequence) {
+	while (optind < argc) {
+	    if ((path_name = split_at(argv[optind], ':')) != 0) {
+		postmap_seq(argv[optind], path_name,
+			    dict_flags | DICT_FLAG_LOCK);
+	    } else {
+		postmap_seq(var_db_type, argv[optind],
+			    dict_flags | DICT_FLAG_LOCK);
+	    }
+	    exit(0);
+	}
+	exit(1);
+    } else {					/* create/update map(s) */
+	if (optind + 1 > argc)
+	    usage(argv[0]);
+	while (optind < argc) {
+	    if ((path_name = split_at(argv[optind], ':')) != 0) {
+		postmap(argv[optind], path_name, postmap_flags,
+			open_flags, dict_flags);
+	    } else {
+		postmap(var_db_type, argv[optind], postmap_flags,
+			open_flags, dict_flags);
+	    }
+	    optind++;
+	}
+	exit(0);
+    }
+}