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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /src/postqueue/postqueue.c
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/postqueue/postqueue.c')
-rw-r--r--src/postqueue/postqueue.c711
1 files changed, 711 insertions, 0 deletions
diff --git a/src/postqueue/postqueue.c b/src/postqueue/postqueue.c
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,711 @@
+/*++
+/* NAME
+/* postqueue 1
+/* SUMMARY
+/* Postfix queue control
+/* SYNOPSIS
+/* .ti -4
+/* \fBTo flush the mail queue\fR:
+/*
+/* \fBpostqueue\fR [\fB-v\fR] [\fB-c \fIconfig_dir\fR] \fB-f\fR
+/*
+/* \fBpostqueue\fR [\fB-v\fR] [\fB-c \fIconfig_dir\fR] \fB-i \fIqueue_id\fR
+/*
+/* \fBpostqueue\fR [\fB-v\fR] [\fB-c \fIconfig_dir\fR] \fB-s \fIsite\fR
+/*
+/* .ti -4
+/* \fBTo list the mail queue\fR:
+/*
+/* \fBpostqueue\fR [\fB-v\fR] [\fB-c \fIconfig_dir\fR] \fB-j\fR
+/*
+/* \fBpostqueue\fR [\fB-v\fR] [\fB-c \fIconfig_dir\fR] \fB-p\fR
+/* DESCRIPTION
+/* The \fBpostqueue\fR(1) command implements the Postfix user interface
+/* for queue management. It implements operations that are
+/* traditionally available via the \fBsendmail\fR(1) command.
+/* See the \fBpostsuper\fR(1) command for queue operations
+/* that require super-user privileges such as deleting a message
+/* from the queue or changing the status of a message.
+/*
+/* The following options are recognized:
+/* .IP "\fB-c \fIconfig_dir\fR"
+/* The \fBmain.cf\fR configuration file is in the named directory
+/* instead of the default configuration directory. See also the
+/* MAIL_CONFIG environment setting below.
+/* .IP \fB-f\fR
+/* Flush the queue: attempt to deliver all queued mail.
+/*
+/* This option implements the traditional "\fBsendmail -q\fR" command,
+/* by contacting the Postfix \fBqmgr\fR(8) daemon.
+/*
+/* Warning: flushing undeliverable mail frequently will result in
+/* poor delivery performance of all other mail.
+/* .IP "\fB-i \fIqueue_id\fR"
+/* Schedule immediate delivery of deferred mail with the
+/* specified queue ID.
+/*
+/* This option implements the traditional \fBsendmail -qI\fR
+/* command, by contacting the \fBflush\fR(8) server.
+/*
+/* This feature is available with Postfix version 2.4 and later.
+/* .IP "\fB-j\fR"
+/* Produce a queue listing in JSON format, based on output
+/* from the showq(8) daemon. The result is a stream of zero
+/* or more JSON objects, one per queue file. Each object is
+/* followed by a newline character to support simple streaming
+/* parsers. See "\fBJSON OBJECT FORMAT\fR" below for details.
+/*
+/* This feature is available in Postfix 3.1 and later.
+/* .IP \fB-p\fR
+/* Produce a traditional sendmail-style queue listing.
+/* This option implements the traditional \fBmailq\fR command,
+/* by contacting the Postfix \fBshowq\fR(8) daemon.
+/*
+/* Each queue entry shows the queue file ID, message
+/* size, arrival time, sender, and the recipients that still need to
+/* be delivered. If mail could not be delivered upon the last attempt,
+/* the reason for failure is shown. The queue ID string
+/* is followed by an optional status character:
+/* .RS
+/* .IP \fB*\fR
+/* The message is in the \fBactive\fR queue, i.e. the message is
+/* selected for delivery.
+/* .IP \fB!\fR
+/* The message is in the \fBhold\fR queue, i.e. no further delivery
+/* attempt will be made until the mail is taken off hold.
+/* .RE
+/* .IP "\fB-s \fIsite\fR"
+/* Schedule immediate delivery of all mail that is queued for the named
+/* \fIsite\fR. A numerical site must be specified as a valid RFC 5321
+/* address literal enclosed in [], just like in email addresses.
+/* The site must be eligible for the "fast flush" service.
+/* See \fBflush\fR(8) for more information about the "fast flush"
+/* service.
+/*
+/* This option implements the traditional "\fBsendmail -qR\fIsite\fR"
+/* command, by contacting the Postfix \fBflush\fR(8) daemon.
+/* .IP \fB-v\fR
+/* Enable verbose logging for debugging purposes. Multiple \fB-v\fR
+/* options make the software increasingly verbose. As of Postfix 2.3,
+/* this option is available for the super-user only.
+/* JSON OBJECT FORMAT
+/* .ad
+/* .fi
+/* Each JSON object represents one queue file; it is emitted
+/* as a single text line followed by a newline character.
+/*
+/* Object members have string values unless indicated otherwise.
+/* Programs should ignore object members that are not listed
+/* here; the list of members is expected to grow over time.
+/* .IP \fBqueue_name\fR
+/* The name of the queue where the message was found. Note
+/* that the contents of the mail queue may change while it is
+/* being listed; some messages may appear more than once, and
+/* some messages may be missed.
+/* .IP \fBqueue_id\fR
+/* The queue file name. The queue_id may be reused within a
+/* Postfix instance unless "enable_long_queue_ids = true" and
+/* time is monotonic. Even then, the queue_id is not expected
+/* to be unique between different Postfix instances. Management
+/* tools that require a unique name should combine the queue_id
+/* with the myhostname setting of the Postfix instance.
+/* .IP \fBarrival_time\fR
+/* The number of seconds since the start of the UNIX epoch.
+/* .IP \fBmessage_size\fR
+/* The number of bytes in the message header and body. This
+/* number does not include message envelope information. It
+/* is approximately equal to the number of bytes that would
+/* be transmitted via SMTP including the <CR><LF> line endings.
+/* .IP \fBsender\fR
+/* The envelope sender address.
+/* .IP \fBrecipients\fR
+/* An array containing zero or more objects with members:
+/* .RS
+/* .IP \fBaddress\fR
+/* One recipient address.
+/* .IP \fBdelay_reason\fR
+/* If present, the reason for delayed delivery. Delayed
+/* recipients may have no delay reason, for example, while
+/* delivery is in progress, or after the system was stopped
+/* before it could record the reason.
+/* .RE
+/* SECURITY
+/* .ad
+/* .fi
+/* This program is designed to run with set-group ID privileges, so
+/* that it can connect to Postfix daemon processes.
+/* STANDARDS
+/* RFC 7159 (JSON notation)
+/* DIAGNOSTICS
+/* Problems are logged to \fBsyslogd\fR(8) or \fBpostlogd\fR(8),
+/* and to the standard error stream.
+/* ENVIRONMENT
+/* .ad
+/* .fi
+/* .IP MAIL_CONFIG
+/* Directory with the \fBmain.cf\fR file. In order to avoid exploitation
+/* of set-group ID privileges, a non-standard directory is allowed only
+/* if:
+/* .RS
+/* .IP \(bu
+/* The name is listed in the standard \fBmain.cf\fR file with the
+/* \fBalternate_config_directories\fR configuration parameter.
+/* .IP \(bu
+/* The command is invoked by the super-user.
+/* .RE
+/* 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 "\fBalternate_config_directories (empty)\fR"
+/* A list of non-default Postfix configuration directories that may
+/* be specified with "-c config_directory" on the command line (in the
+/* case of \fBsendmail\fR(1), with the "-C" option), or via the MAIL_CONFIG
+/* environment parameter.
+/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR"
+/* The default location of the Postfix main.cf and master.cf
+/* configuration files.
+/* .IP "\fBcommand_directory (see 'postconf -d' output)\fR"
+/* The location of all postfix administrative commands.
+/* .IP "\fBfast_flush_domains ($relay_domains)\fR"
+/* Optional list of destinations that are eligible for per-destination
+/* logfiles with mail that is queued to those destinations.
+/* .IP "\fBimport_environment (see 'postconf -d' output)\fR"
+/* The list of environment parameters that a privileged Postfix
+/* process will import from a non-Postfix parent process, or name=value
+/* environment overrides.
+/* .IP "\fBqueue_directory (see 'postconf -d' output)\fR"
+/* The location of the Postfix top-level queue directory.
+/* .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".
+/* .IP "\fBtrigger_timeout (10s)\fR"
+/* The time limit for sending a trigger to a Postfix daemon (for
+/* example, the \fBpickup\fR(8) or \fBqmgr\fR(8) daemon).
+/* .PP
+/* Available in Postfix version 2.2 and later:
+/* .IP "\fBauthorized_flush_users (static:anyone)\fR"
+/* List of users who are authorized to flush the queue.
+/* .IP "\fBauthorized_mailq_users (static:anyone)\fR"
+/* List of users who are authorized to view the queue.
+/* FILES
+/* /var/spool/postfix, mail queue
+/* SEE ALSO
+/* qmgr(8), queue manager
+/* showq(8), list mail queue
+/* flush(8), fast flush service
+/* sendmail(1), Sendmail-compatible user interface
+/* postsuper(1), privileged queue operations
+/* 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
+/* ETRN_README, Postfix ETRN howto
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* HISTORY
+/* .ad
+/* .fi
+/* The postqueue command was introduced with Postfix version 1.1.
+/* 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 <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sysexits.h>
+#include <errno.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <mymalloc.h>
+#include <clean_env.h>
+#include <vstream.h>
+#include <msg_vstream.h>
+#include <argv.h>
+#include <safe.h>
+#include <connect.h>
+#include <valid_hostname.h>
+#include <warn_stat.h>
+#include <events.h>
+#include <stringops.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+#include <mail_params.h>
+#include <mail_version.h>
+#include <mail_conf.h>
+#include <mail_task.h>
+#include <mail_run.h>
+#include <mail_flush.h>
+#include <mail_queue.h>
+#include <flush_clnt.h>
+#include <smtp_stream.h>
+#include <user_acl.h>
+#include <valid_mailhost_addr.h>
+#include <mail_dict.h>
+#include <mail_parm_split.h>
+#include <maillog_client.h>
+
+/* Application-specific. */
+
+#include <postqueue.h>
+
+ /*
+ * WARNING WARNING WARNING
+ *
+ * This software is designed to run set-gid. In order to avoid exploitation of
+ * privilege, this software should not run any external commands, nor should
+ * it take any information from the user, unless that information can be
+ * properly sanitized. To get an idea of how much information a process can
+ * inherit from a potentially hostile user, examine all the members of the
+ * process structure (typically, in /usr/include/sys/proc.h): the current
+ * directory, open files, timers, signals, environment, command line, umask,
+ * and so on.
+ */
+
+ /*
+ * Modes of operation.
+ *
+ * XXX To support flush by recipient domain, or for destinations that have no
+ * mapping to logfile, the server has to defend against resource exhaustion
+ * attacks. A malicious user could fork off a postqueue client that starts
+ * an expensive requests and then kills the client immediately; this way she
+ * could create a high Postfix load on the system without ever exceeding her
+ * own per-user process limit. To prevent this, either the server needs to
+ * establish frequent proof of client liveliness with challenge/response, or
+ * the client needs to restrict expensive requests to privileged users only.
+ *
+ * We don't have this problem with queue listings. The showq server detects an
+ * EPIPE error after reporting a few queue entries.
+ */
+#define PQ_MODE_DEFAULT 0 /* noop */
+#define PQ_MODE_MAILQ_LIST 1 /* list mail queue */
+#define PQ_MODE_FLUSH_QUEUE 2 /* flush queue */
+#define PQ_MODE_FLUSH_SITE 3 /* flush site */
+#define PQ_MODE_FLUSH_FILE 4 /* flush message */
+#define PQ_MODE_JSON_LIST 5 /* JSON-format queue listing */
+
+ /*
+ * Silly little macros (SLMs).
+ */
+#define STR vstring_str
+
+ /*
+ * Queue manipulation access lists.
+ */
+char *var_flush_acl;
+char *var_showq_acl;
+
+static const CONFIG_STR_TABLE str_table[] = {
+ VAR_FLUSH_ACL, DEF_FLUSH_ACL, &var_flush_acl, 0, 0,
+ VAR_SHOWQ_ACL, DEF_SHOWQ_ACL, &var_showq_acl, 0, 0,
+ 0,
+};
+
+/* show_queue - show queue status */
+
+static void show_queue(int mode)
+{
+ const char *errstr;
+ VSTREAM *showq;
+ int n;
+ uid_t uid = getuid();
+
+ if (uid != 0 && uid != var_owner_uid
+ && (errstr = check_user_acl_byuid(VAR_SHOWQ_ACL, var_showq_acl,
+ uid)) != 0)
+ msg_fatal_status(EX_NOPERM,
+ "User %s(%ld) is not allowed to view the mail queue",
+ errstr, (long) uid);
+
+ /*
+ * Connect to the show queue service.
+ */
+ if ((showq = mail_connect(MAIL_CLASS_PUBLIC, var_showq_service, BLOCKING)) != 0) {
+ switch (mode) {
+ case PQ_MODE_MAILQ_LIST:
+ showq_compat(showq);
+ break;
+ case PQ_MODE_JSON_LIST:
+ showq_json(showq);
+ break;
+ default:
+ msg_panic("show_queue: unknown mode %d", mode);
+ }
+ if (vstream_fclose(showq))
+ msg_warn("close: %m");
+ }
+
+ /*
+ * Don't assume that the mail system is down when the user has
+ * insufficient permission to access the showq socket.
+ */
+ else if (errno == EACCES) {
+ msg_fatal_status(EX_SOFTWARE,
+ "Connect to the %s %s service: %m",
+ var_mail_name, var_showq_service);
+ }
+
+ /*
+ * When the mail system is down, the superuser can still access the queue
+ * directly. Just run the showq program in stand-alone mode.
+ */
+ else if (geteuid() == 0) {
+ char *showq_path;
+ ARGV *argv;
+ int stat;
+
+ msg_warn("Mail system is down -- accessing queue directly");
+ showq_path = concatenate(var_daemon_dir, "/", var_showq_service,
+ (char *) 0);
+ argv = argv_alloc(6);
+ argv_add(argv, showq_path, "-u", "-S", (char *) 0);
+ for (n = 0; n < msg_verbose; n++)
+ argv_add(argv, "-v", (char *) 0);
+ argv_terminate(argv);
+ if ((showq = vstream_popen(O_RDONLY,
+ CA_VSTREAM_POPEN_ARGV(argv->argv),
+ CA_VSTREAM_POPEN_END)) == 0) {
+ stat = -1;
+ } else {
+ switch (mode) {
+ case PQ_MODE_MAILQ_LIST:
+ showq_compat(showq);
+ break;
+ case PQ_MODE_JSON_LIST:
+ showq_json(showq);
+ break;
+ default:
+ msg_panic("show_queue: unknown mode %d", mode);
+ }
+ stat = vstream_pclose(showq);
+ }
+ argv_free(argv);
+ if (stat != 0)
+ msg_fatal_status(stat < 0 ? EX_OSERR : EX_SOFTWARE,
+ "Error running %s", showq_path);
+ myfree(showq_path);
+ }
+
+ /*
+ * When the mail system is down, unprivileged users are stuck, because by
+ * design the mail system contains no set_uid programs. The only way for
+ * an unprivileged user to cross protection boundaries is to talk to the
+ * showq daemon.
+ */
+ else {
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Queue report unavailable - mail system is down");
+ }
+}
+
+/* flush_queue - force delivery */
+
+static void flush_queue(void)
+{
+ const char *errstr;
+ uid_t uid = getuid();
+
+ if (uid != 0 && uid != var_owner_uid
+ && (errstr = check_user_acl_byuid(VAR_FLUSH_ACL, var_flush_acl,
+ uid)) != 0)
+ msg_fatal_status(EX_NOPERM,
+ "User %s(%ld) is not allowed to flush the mail queue",
+ errstr, (long) uid);
+
+ /*
+ * Trigger the flush queue service.
+ */
+ if (mail_flush_deferred() < 0)
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Cannot flush mail queue - mail system is down");
+ if (mail_flush_maildrop() < 0)
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Cannot flush mail queue - mail system is down");
+ event_drain(2);
+}
+
+/* flush_site - flush mail for site */
+
+static void flush_site(const char *site)
+{
+ int status;
+ const char *errstr;
+ uid_t uid = getuid();
+
+ if (uid != 0 && uid != var_owner_uid
+ && (errstr = check_user_acl_byuid(VAR_FLUSH_ACL, var_flush_acl,
+ uid)) != 0)
+ msg_fatal_status(EX_NOPERM,
+ "User %s(%ld) is not allowed to flush the mail queue",
+ errstr, (long) uid);
+
+ flush_init();
+
+ switch (status = flush_send_site(site)) {
+ case FLUSH_STAT_OK:
+ exit(0);
+ case FLUSH_STAT_BAD:
+ msg_fatal_status(EX_USAGE, "Invalid request: \"%s\"", site);
+ case FLUSH_STAT_FAIL:
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Cannot flush mail queue - mail system is down");
+ case FLUSH_STAT_DENY:
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Flush service is not configured for destination \"%s\"",
+ site);
+ default:
+ msg_fatal_status(EX_SOFTWARE,
+ "Unknown flush server reply status %d", status);
+ }
+}
+
+/* flush_file - flush mail with specific queue ID */
+
+static void flush_file(const char *queue_id)
+{
+ int status;
+ const char *errstr;
+ uid_t uid = getuid();
+
+ if (uid != 0 && uid != var_owner_uid
+ && (errstr = check_user_acl_byuid(VAR_FLUSH_ACL, var_flush_acl,
+ uid)) != 0)
+ msg_fatal_status(EX_NOPERM,
+ "User %s(%ld) is not allowed to flush the mail queue",
+ errstr, (long) uid);
+
+ switch (status = flush_send_file(queue_id)) {
+ case FLUSH_STAT_OK:
+ exit(0);
+ case FLUSH_STAT_BAD:
+ msg_fatal_status(EX_USAGE, "Invalid request: \"%s\"", queue_id);
+ case FLUSH_STAT_FAIL:
+ msg_fatal_status(EX_UNAVAILABLE,
+ "Cannot flush mail queue - mail system is down");
+ default:
+ msg_fatal_status(EX_SOFTWARE,
+ "Unexpected flush server reply status %d", status);
+ }
+}
+
+/* unavailable - sanitize exit status from library run-time errors */
+
+static void unavailable(void)
+{
+ exit(EX_UNAVAILABLE);
+}
+
+/* usage - scream and die */
+
+static NORETURN usage(void)
+{
+ msg_fatal_status(EX_USAGE, "usage: postqueue -f | postqueue -i queueid | postqueue -j | postqueue -p | postqueue -s site");
+}
+
+MAIL_VERSION_STAMP_DECLARE;
+
+/* main - the main program */
+
+int main(int argc, char **argv)
+{
+ struct stat st;
+ int c;
+ int fd;
+ int mode = PQ_MODE_DEFAULT;
+ char *site_to_flush = 0;
+ char *id_to_flush = 0;
+ ARGV *import_env;
+ int bad_site;
+
+ /*
+ * 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_status(EX_UNAVAILABLE, "open /dev/null: %m");
+
+ /*
+ * Initialize. Set up logging. Read the global configuration file after
+ * parsing command-line arguments. Censor the process name: it is
+ * provided by the user.
+ */
+ argv[0] = "postqueue";
+ msg_vstream_init(argv[0], VSTREAM_ERR);
+ msg_cleanup(unavailable);
+ maillog_client_init(mail_task("postqueue"), MAILLOG_CLIENT_FLAG_NONE);
+ set_mail_conf_str(VAR_PROCNAME, var_procname = mystrdup(argv[0]));
+
+ /*
+ * Check the Postfix library version as soon as we enable logging.
+ */
+ MAIL_VERSION_CHECK;
+
+ /*
+ * Parse JCL. This program is set-gid and must sanitize all command-line
+ * parameters. The configuration directory argument is validated by the
+ * mail configuration read routine. Don't do complex things until we have
+ * completed initializations.
+ */
+ while ((c = GETOPT(argc, argv, "c:fi:jps:v")) > 0) {
+ switch (c) {
+ case 'c': /* non-default configuration */
+ if (setenv(CONF_ENV_PATH, optarg, 1) < 0)
+ msg_fatal_status(EX_UNAVAILABLE, "out of memory");
+ break;
+ case 'f': /* flush queue */
+ if (mode != PQ_MODE_DEFAULT)
+ usage();
+ mode = PQ_MODE_FLUSH_QUEUE;
+ break;
+ case 'i': /* flush queue file */
+ if (mode != PQ_MODE_DEFAULT)
+ usage();
+ mode = PQ_MODE_FLUSH_FILE;
+ id_to_flush = optarg;
+ break;
+ case 'j':
+ if (mode != PQ_MODE_DEFAULT)
+ usage();
+ mode = PQ_MODE_JSON_LIST;
+ break;
+ case 'p': /* traditional mailq */
+ if (mode != PQ_MODE_DEFAULT)
+ usage();
+ mode = PQ_MODE_MAILQ_LIST;
+ break;
+ case 's': /* flush site */
+ if (mode != PQ_MODE_DEFAULT)
+ usage();
+ mode = PQ_MODE_FLUSH_SITE;
+ site_to_flush = optarg;
+ break;
+ case 'v':
+ if (geteuid() == 0)
+ msg_verbose++;
+ break;
+ default:
+ usage();
+ }
+ }
+ if (argc > optind)
+ usage();
+
+ /*
+ * Further initialization...
+ */
+ mail_conf_read();
+ /* Re-evaluate mail_task() after reading main.cf. */
+ maillog_client_init(mail_task("postqueue"), MAILLOG_CLIENT_FLAG_NONE);
+ mail_dict_init(); /* proxy, sql, ldap */
+ get_mail_conf_str_table(str_table);
+
+ /*
+ * This program is designed to be set-gid, which makes it a potential
+ * target for attack. Strip and optionally override the process
+ * environment so that we don't have to trust the C library.
+ */
+ import_env = mail_parm_split(VAR_IMPORT_ENVIRON, var_import_environ);
+ clean_env(import_env->argv);
+ argv_free(import_env);
+
+ if (chdir(var_queue_dir))
+ msg_fatal_status(EX_UNAVAILABLE, "chdir %s: %m", var_queue_dir);
+
+ signal(SIGPIPE, SIG_IGN);
+
+ /* End of initializations. */
+
+ /*
+ * Further input validation.
+ */
+ if (site_to_flush != 0) {
+ bad_site = 0;
+ if (*site_to_flush == '[') {
+ bad_site = !valid_mailhost_literal(site_to_flush, DONT_GRIPE);
+ } else {
+ bad_site = !valid_hostname(site_to_flush, DONT_GRIPE);
+ }
+ if (bad_site)
+ msg_fatal_status(EX_USAGE,
+ "Cannot flush mail queue - invalid destination: \"%.100s%s\"",
+ site_to_flush, strlen(site_to_flush) > 100 ? "..." : "");
+ }
+ if (id_to_flush != 0) {
+ if (!mail_queue_id_ok(id_to_flush))
+ msg_fatal_status(EX_USAGE,
+ "Cannot flush queue ID - invalid name: \"%.100s%s\"",
+ id_to_flush, strlen(id_to_flush) > 100 ? "..." : "");
+ }
+
+ /*
+ * Start processing.
+ */
+ switch (mode) {
+ default:
+ msg_panic("unknown operation mode: %d", mode);
+ /* NOTREACHED */
+ case PQ_MODE_MAILQ_LIST:
+ case PQ_MODE_JSON_LIST:
+ show_queue(mode);
+ exit(0);
+ break;
+ case PQ_MODE_FLUSH_SITE:
+ flush_site(site_to_flush);
+ exit(0);
+ break;
+ case PQ_MODE_FLUSH_FILE:
+ flush_file(id_to_flush);
+ exit(0);
+ break;
+ case PQ_MODE_FLUSH_QUEUE:
+ flush_queue();
+ exit(0);
+ break;
+ case PQ_MODE_DEFAULT:
+ usage();
+ /* NOTREACHED */
+ }
+}