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Diffstat (limited to '')
| -rw-r--r-- | src/postsuper/postsuper.c | 1593 |
1 files changed, 1593 insertions, 0 deletions
diff --git a/src/postsuper/postsuper.c b/src/postsuper/postsuper.c new file mode 100644 index 0000000..cab3814 --- /dev/null +++ b/src/postsuper/postsuper.c @@ -0,0 +1,1593 @@ +/*++ +/* NAME +/* postsuper 1 +/* SUMMARY +/* Postfix superintendent +/* SYNOPSIS +/* .fi +/* \fBpostsuper\fR [\fB-psSv\fR] +/* [\fB-c \fIconfig_dir\fR] [\fB-d \fIqueue_id\fR] +/* [\fB-e \fIqueue_id\fR] [\fB-f \fIqueue_id\fR] +/* [\fB-h \fIqueue_id\fR] [\fB-H \fIqueue_id\fR] +/* [\fB-r \fIqueue_id\fR] [\fIdirectory ...\fR] +/* DESCRIPTION +/* The \fBpostsuper\fR(1) command does maintenance jobs on the Postfix +/* queue. Use of the command is restricted to the superuser. +/* See the \fBpostqueue\fR(1) command for unprivileged queue operations +/* such as listing or flushing the mail queue. +/* +/* By default, \fBpostsuper\fR(1) performs the operations +/* requested with the +/* \fB-s\fR and \fB-p\fR command-line options on all Postfix queue +/* directories - this includes the \fBincoming\fR, \fBactive\fR, +/* \fBdeferred\fR, and \fBhold\fR directories with message +/* files and the \fBbounce\fR, +/* \fBdefer\fR, \fBtrace\fR and \fBflush\fR directories with log files. +/* +/* Options: +/* .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-d \fIqueue_id\fR" +/* Delete one message with the named queue ID from the named +/* mail queue(s) (default: \fBhold\fR, \fBincoming\fR, \fBactive\fR and +/* \fBdeferred\fR). +/* +/* To delete multiple files, specify the \fB-d\fR option multiple +/* times, or specify a \fIqueue_id\fR of \fB-\fR to read queue IDs +/* from standard input. For example, to delete all mail +/* with exactly one recipient \fBuser@example.com\fR: +/* .sp +/* .nf +/* mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" } +/* # $7=sender, $8=recipient1, $9=recipient2 +/* { if ($8 == "user@example.com" && $9 == "") +/* print $1 } +/* ' | tr -d '*!' | postsuper -d - +/* .fi +/* .sp +/* Specify "\fB-d ALL\fR" to remove all messages; for example, specify +/* "\fB-d ALL deferred\fR" to delete all mail in the \fBdeferred\fR queue. +/* As a safety measure, the word \fBALL\fR must be specified in upper +/* case. +/* .sp +/* Warning: Postfix queue IDs are reused (always with Postfix +/* <= 2.8; and with Postfix >= 2.9 when enable_long_queue_ids=no). +/* There is a very small possibility that postsuper deletes the +/* wrong message file when it is executed while the Postfix mail +/* system is delivering mail. +/* .sp +/* The scenario is as follows: +/* .RS +/* .IP 1) +/* The Postfix queue manager deletes the message that \fBpostsuper\fR(1) +/* is asked to delete, because Postfix is finished with the +/* message (it is delivered, or it is returned to the sender). +/* .IP 2) +/* New mail arrives, and the new message is given the same queue ID +/* as the message that \fBpostsuper\fR(1) is supposed to delete. +/* The probability for reusing a deleted queue ID is about 1 in 2**15 +/* (the number of different microsecond values that the system clock +/* can distinguish within a second). +/* .IP 3) +/* \fBpostsuper\fR(1) deletes the new message, instead of the old +/* message that it should have deleted. +/* .RE +/* .IP "\fB-e \fIqueue_id\fR" +/* .IP "\fB-f \fIqueue_id\fR" +/* Request forced expiration for one message with the named +/* queue ID in the named mail queue(s) (default: \fBhold\fR, +/* \fBincoming\fR, \fBactive\fR and \fBdeferred\fR). +/* .RS +/* .IP \(bu +/* The message will be returned to the sender when the queue +/* manager attempts to deliver that message (note that Postfix +/* will never deliver messages in the \fBhold\fR queue). +/* .IP \(bu +/* The \fB-e\fR and \fB-f\fR options both request forced +/* expiration. The difference is that \fB-f\fR will also release +/* a message if it is in the \fBhold\fR queue. With \fB-e\fR, such +/* a message would not be returned to the sender until it is +/* released with \fB-f\fR or \fB-H\fR. +/* .IP \(bu +/* When a deferred message is force-expired, the return message +/* will state the reason for the delay. Otherwise, the reason +/* will be "message is administratively expired". +/* .RE +/* .IP +/* To expire multiple files, specify the \fB-e\fR or \fB-f\fR +/* option multiple times, or specify a \fIqueue_id\fR of \fB-\fR +/* to read queue IDs from standard input (see the \fB-d\fR option +/* above for an example, but be sure to replace \fB-d\fR in +/* the example). +/* .sp +/* Specify "\fB-e ALL\fR" or "\fB-f ALL\fR" to expire all +/* messages; for example, specify "\fB-e ALL deferred\fR" to +/* expire all mail in the \fBdeferred\fR queue. As a safety +/* measure, the word \fBALL\fR must be specified in upper case. +/* .sp +/* These features are available in Postfix 3.5 and later. +/* .IP "\fB-h \fIqueue_id\fR" +/* Put mail "on hold" so that no attempt is made to deliver it. +/* Move one message with the named queue ID from the named +/* mail queue(s) (default: \fBincoming\fR, \fBactive\fR and +/* \fBdeferred\fR) to the \fBhold\fR queue. +/* +/* To hold multiple files, specify the \fB-h\fR option multiple +/* times, or specify a \fIqueue_id\fR of \fB-\fR to read queue IDs +/* from standard input. +/* .sp +/* Specify "\fB-h ALL\fR" to hold all messages; for example, specify +/* "\fB-h ALL deferred\fR" to hold all mail in the \fBdeferred\fR queue. +/* As a safety measure, the word \fBALL\fR must be specified in upper +/* case. +/* .sp +/* Note: while mail is "on hold" it will not expire when its +/* time in the queue exceeds the \fBmaximal_queue_lifetime\fR +/* or \fBbounce_queue_lifetime\fR setting. It becomes subject to +/* expiration after it is released from "hold". +/* .sp +/* This feature is available in Postfix 2.0 and later. +/* .IP "\fB-H \fIqueue_id\fR" +/* Release mail that was put "on hold". +/* Move one message with the named queue ID from the named +/* mail queue(s) (default: \fBhold\fR) to the \fBdeferred\fR queue. +/* +/* To release multiple files, specify the \fB-H\fR option multiple +/* times, or specify a \fIqueue_id\fR of \fB-\fR to read queue IDs +/* from standard input. +/* .sp +/* Note: specify "\fBpostsuper -r\fR" to release mail that was kept on +/* hold for a significant fraction of \fB$maximal_queue_lifetime\fR +/* or \fB$bounce_queue_lifetime\fR, or longer. +/* .sp +/* Specify "\fB-H ALL\fR" to release all mail that is "on hold". +/* As a safety measure, the word \fBALL\fR must be specified in upper +/* case. +/* .sp +/* This feature is available in Postfix 2.0 and later. +/* .IP \fB-p\fR +/* Purge old temporary files that are left over after system or +/* software crashes. +/* The \fB-p\fR, \fB-s\fR, and \fB-S\fR operations are done +/* before other operations. +/* .IP "\fB-r \fIqueue_id\fR" +/* Requeue the message with the named queue ID from the named +/* mail queue(s) (default: \fBhold\fR, \fBincoming\fR, \fBactive\fR and +/* \fBdeferred\fR). +/* +/* To requeue multiple files, specify the \fB-r\fR option multiple +/* times, or specify a \fIqueue_id\fR of \fB-\fR to read queue IDs +/* from standard input. +/* .sp +/* Specify "\fB-r ALL\fR" to requeue all messages. As a safety +/* measure, the word \fBALL\fR must be specified in upper case. +/* .sp +/* A requeued message is moved to the \fBmaildrop\fR queue, +/* from where it is copied by the \fBpickup\fR(8) and +/* \fBcleanup\fR(8) daemons to a new queue file. In many +/* respects its handling differs from that of a new local +/* submission. +/* .RS +/* .IP \(bu +/* The message is not subjected to the smtpd_milters or +/* non_smtpd_milters settings. When mail has passed through +/* an external content filter, this would produce incorrect +/* results with Milter applications that depend on original +/* SMTP connection state information. +/* .IP \(bu +/* The message is subjected again to mail address rewriting +/* and substitution. This is useful when rewriting rules or +/* virtual mappings have changed. +/* .sp +/* The address rewriting context (local or remote) is the same +/* as when the message was received. +/* .IP \(bu +/* The message is subjected to the same content_filter settings +/* (if any) as used for new local mail submissions. This is +/* useful when content_filter settings have changed. +/* .RE +/* .IP +/* Warning: Postfix queue IDs are reused (always with Postfix +/* <= 2.8; and with Postfix >= 2.9 when enable_long_queue_ids=no). +/* There is a very small possibility that \fBpostsuper\fR(1) requeues +/* the wrong message file when it is executed while the Postfix mail +/* system is running, but no harm should be done. +/* .sp +/* This feature is available in Postfix 1.1 and later. +/* .IP \fB-s\fR +/* Structure check and structure repair. This should be done once +/* before Postfix startup. +/* The \fB-p\fR, \fB-s\fR, and \fB-S\fR operations are done +/* before other operations. +/* .RS +/* .IP \(bu +/* Rename files whose name does not match the message file inode +/* number. This operation is necessary after restoring a mail +/* queue from a different machine or from backup, when queue +/* files were created with Postfix <= 2.8 or with +/* "enable_long_queue_ids = no". +/* .IP \(bu +/* Move queue files that are in the wrong place in the file system +/* hierarchy and remove subdirectories that are no longer needed. +/* File position rearrangements are necessary after a change in the +/* \fBhash_queue_names\fR and/or \fBhash_queue_depth\fR +/* configuration parameters. +/* .IP \(bu +/* Rename queue files created with "enable_long_queue_ids = +/* yes" to short names, for migration to Postfix <= 2.8. The +/* procedure is as follows: +/* .sp +/* .nf +/* .na +/* # postfix stop +/* # postconf enable_long_queue_ids=no +/* # postsuper +/* .ad +/* .fi +/* .sp +/* Run \fBpostsuper\fR(1) repeatedly until it stops reporting +/* file name changes. +/* .RE +/* .IP \fB-S\fR +/* A redundant version of \fB-s\fR that requires that long +/* file names also match the message file inode number. This +/* option exists for testing purposes, and is available with +/* Postfix 2.9 and later. +/* The \fB-p\fR, \fB-s\fR, and \fB-S\fR operations are done +/* before other operations. +/* .IP \fB-v\fR +/* Enable verbose logging for debugging purposes. Multiple \fB-v\fR +/* options make the software increasingly verbose. +/* DIAGNOSTICS +/* Problems are reported to the standard error stream and to +/* \fBsyslogd\fR(8) or \fBpostlogd\fR(8). +/* +/* \fBpostsuper\fR(1) reports the number of messages deleted +/* with \fB-d\fR, the number of messages expired with \fB-e\fR, +/* the number of messages expired or released with \fB-f\fR, +/* the number of messages held or released with \fB-h\fR or +/* \fB-H\fR, the number of messages requeued with \fB-r\fR, +/* and the number of messages whose queue file name was fixed +/* with \fB-s\fR. The report is written to the standard error +/* stream and to \fBsyslogd\fR(8) or \fBpostlogd\fR(8). +/* ENVIRONMENT +/* .ad +/* .fi +/* .IP MAIL_CONFIG +/* Directory with the \fBmain.cf\fR file. +/* BUGS +/* Mail that is not sanitized by Postfix (i.e. mail in the \fBmaildrop\fR +/* queue) cannot be placed "on hold". +/* 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 "\fBconfig_directory (see 'postconf -d' output)\fR" +/* The default location of the Postfix main.cf and master.cf +/* configuration files. +/* .IP "\fBhash_queue_depth (1)\fR" +/* The number of subdirectory levels for queue directories listed with +/* the hash_queue_names parameter. +/* .IP "\fBhash_queue_names (deferred, defer)\fR" +/* The names of queue directories that are split across multiple +/* subdirectory levels. +/* .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". +/* .PP +/* Available in Postfix version 2.9 and later: +/* .IP "\fBenable_long_queue_ids (no)\fR" +/* Enable long, non-repeating, queue IDs (queue file names). +/* SEE ALSO +/* sendmail(1), Sendmail-compatible user interface +/* postqueue(1), unprivileged queue operations +/* postlogd(8), Postfix logging +/* syslogd(8), system logging +/* 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 <unistd.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <signal.h> +#include <stdio.h> /* remove() */ +#include <utime.h> + +/* Utility library. */ + +#include <mymalloc.h> +#include <msg.h> +#include <vstream.h> +#include <msg_vstream.h> +#include <scan_dir.h> +#include <vstring.h> +#include <safe.h> +#include <set_ugid.h> +#include <argv.h> +#include <vstring_vstream.h> +#include <sane_fsops.h> +#include <myrand.h> +#include <warn_stat.h> +#include <clean_env.h> +#include <safe_open.h> +#include <name_mask.h> + +/* Global library. */ + +#include <mail_task.h> +#include <mail_conf.h> +#include <mail_params.h> +#include <mail_version.h> +#define MAIL_QUEUE_INTERNAL +#include <mail_queue.h> +#include <mail_open_ok.h> +#include <file_id.h> +#include <mail_parm_split.h> +#include <maillog_client.h> + +/* Application-specific. */ + +#define MAX_TEMP_AGE (7 * 60 * 60 * 24) /* temp file maximal age */ +#define STR vstring_str /* silly little macro */ + +#define ACTION_STRUCT (1<<0) /* fix file organization */ +#define ACTION_PURGE (1<<1) /* purge old temp files */ +#define ACTION_DELETE_ONE (1<<2) /* delete named queue file(s) */ +#define ACTION_DELETE_ALL (1<<3) /* delete all queue file(s) */ +#define ACTION_REQUEUE_ONE (1<<4) /* requeue named queue file(s) */ +#define ACTION_REQUEUE_ALL (1<<5) /* requeue all queue file(s) */ +#define ACTION_HOLD_ONE (1<<6) /* put named queue file(s) on hold */ +#define ACTION_HOLD_ALL (1<<7) /* put all messages on hold */ +#define ACTION_RELEASE_ONE (1<<8) /* release named queue file(s) */ +#define ACTION_RELEASE_ALL (1<<9) /* release all "on hold" mail */ +#define ACTION_STRUCT_RED (1<<10) /* fix long queue ID inode fields */ +#define ACTION_EXPIRE_ONE (1<<11) /* expire named queue file(s) */ +#define ACTION_EXPIRE_ALL (1<<12) /* expire all queue file(s) */ +#define ACTION_EXP_REL_ONE (1<<13) /* expire+release named queue file(s) */ +#define ACTION_EXP_REL_ALL (1<<14) /* expire+release all queue file(s) */ + +#define ACTION_DEFAULT (ACTION_STRUCT | ACTION_PURGE) + + /* + * Actions that operate on individually named queue files. These must never + * be done after fixing queue file names to match their inode number because + * the target file may have been replaced. Actions that move files are safe + * only when queue file names match their inode number, otherwise mail can + * be lost due to filename collisions. + */ +#define ACTIONS_BY_QUEUE_ID (ACTION_DELETE_ONE | ACTION_REQUEUE_ONE \ + | ACTION_HOLD_ONE | ACTION_RELEASE_ONE \ + | ACTION_EXPIRE_ONE | ACTION_EXP_REL_ONE) + + /* + * Mass actions. Actions that move files are safe only when queue file names + * match their inode number, otherwise mail can be lost due to filename + * collisions. + */ +#define ACTIONS_BY_WILDCARD (ACTION_DELETE_ALL | ACTION_REQUEUE_ALL \ + | ACTION_HOLD_ALL | ACTION_RELEASE_ALL \ + | ACTION_EXPIRE_ALL | ACTION_EXP_REL_ALL) + +#define ACTIONS_FOR_REPAIR (ACTION_PURGE | ACTION_STRUCT \ + | ACTION_STRUCT_RED) + + /* + * Information about queue directories and what we expect to do there. If a + * file has unexpected owner permissions and is older than some threshold, + * the file is discarded. We don't step into maildrop subdirectories - if + * maildrop is writable, we might end up in the wrong place, deleting the + * wrong information. + */ +struct queue_info { + char *name; /* directory name */ + int perms; /* expected permissions */ + int flags; /* see below */ +}; + +#define RECURSE (1<<0) /* step into subdirectories */ +#define DONT_RECURSE 0 /* don't step into directories */ + +static struct queue_info queue_info[] = { + MAIL_QUEUE_MAILDROP, MAIL_QUEUE_STAT_READY, DONT_RECURSE, + MAIL_QUEUE_INCOMING, MAIL_QUEUE_STAT_READY, RECURSE, + MAIL_QUEUE_ACTIVE, MAIL_QUEUE_STAT_READY, RECURSE, + MAIL_QUEUE_DEFERRED, MAIL_QUEUE_STAT_READY, RECURSE, + MAIL_QUEUE_HOLD, MAIL_QUEUE_STAT_READY, RECURSE, + MAIL_QUEUE_TRACE, 0600, RECURSE, + MAIL_QUEUE_DEFER, 0600, RECURSE, + MAIL_QUEUE_BOUNCE, 0600, RECURSE, + MAIL_QUEUE_FLUSH, 0600, RECURSE, + 0, +}; + + /* + * Directories with per-message meta files. + */ +const char *log_queue_names[] = { + MAIL_QUEUE_BOUNCE, + MAIL_QUEUE_DEFER, + MAIL_QUEUE_TRACE, + 0, +}; + + /* + * Cruft that we append to a file name when a queue ID is named after the + * message file inode number. This cruft must not pass mail_queue_id_ok() so + * that the queue manager will ignore it, should people be so unwise as to + * run this operation on a live mail system. + */ +#define SUFFIX "#FIX" +#define SUFFIX_LEN 4 + + /* + * Grr. These counters are global, because C only has clumsy ways to return + * multiple results from a function. + */ +static int message_requeued = 0; /* requeued messages */ +static int message_held = 0; /* messages put on hold */ +static int message_released = 0; /* messages released from hold */ +static int message_deleted = 0; /* deleted messages */ +static int message_expired = 0; /* expired messages */ +static int inode_fixed = 0; /* queue id matched to inode number */ +static int inode_mismatch = 0; /* queue id inode mismatch */ +static int position_mismatch = 0; /* file position mismatch */ + + /* + * Silly little macros. These translate arcane expressions into something + * more at a conceptual level. + */ +#define MESSAGE_QUEUE(qp) ((qp)->perms == MAIL_QUEUE_STAT_READY) +#define READY_MESSAGE(st) (((st).st_mode & S_IRWXU) == MAIL_QUEUE_STAT_READY) + +/* find_queue_info - look up expected permissions field by queue name */ + +static struct queue_info *find_queue_info(const char *queue_name) +{ + struct queue_info *qp; + + for (qp = queue_info; qp->name; qp++) + if (strcmp(queue_name, qp->name) == 0) + return (qp); + msg_fatal("invalid directory name: %s", queue_name); +} + +/* postremove - remove file with extreme prejudice */ + +static int postremove(const char *path) +{ + int ret; + + if ((ret = remove(path)) < 0) { + if (errno != ENOENT) + msg_fatal("remove file %s: %m", path); + } else { + if (msg_verbose) + msg_info("removed file %s", path); + } + return (ret); +} + +/* postexpire - expire file, setting the group execute permission */ + +static int postexpire(const char *path) +{ + static VSTRING *why = 0; + VSTREAM *fp; + struct stat st; + + /* + * Initialize. + */ + if (why == 0) + why = vstring_alloc(100); + + /* + * We don't actually verify the file content, therefore safe_open() the + * queue file so that we won't add group execute permission to some file + * outside of the mail queue. + */ + if ((fp = safe_open(path, O_RDWR, 0, &st, -1, -1, why)) == 0) { + if (errno != ENOENT) + msg_warn("expire file %s: %s", path, vstring_str(why)); + return (-1); + } +#define POSTEXPIRE_RETURN(x) do { \ + (void) vstream_fclose(fp); \ + return (x); \ + } while (0) + + if (!READY_MESSAGE(st)) + POSTEXPIRE_RETURN(-1); /* must not expire */ + if ((st.st_mode & MAIL_QUEUE_STAT_EXPIRE) != 0) + POSTEXPIRE_RETURN(-1); /* already expired */ + if (fchmod(vstream_fileno(fp), + (st.st_mode | MAIL_QUEUE_STAT_EXPIRE) & ~S_IFMT) < 0) { + msg_warn("expire file %s: cannot set permission: %m", path); + POSTEXPIRE_RETURN(-1); + } + POSTEXPIRE_RETURN(0); +} + +/* postrename - rename file with extreme prejudice */ + +static int postrename(const char *old, const char *new) +{ + int ret; + + if ((ret = sane_rename(old, new)) < 0) { + if (errno != ENOENT + || mail_queue_mkdirs(new) < 0 + || (ret = sane_rename(old, new)) < 0) + if (errno != ENOENT) + msg_fatal("rename file %s as %s: %m", old, new); + } else { + if (msg_verbose) + msg_info("renamed file %s as %s", old, new); + } + return (ret); +} + +/* postrmdir - remove directory with extreme prejudice */ + +static int postrmdir(const char *path) +{ + int ret; + + if ((ret = rmdir(path)) < 0) { + if (errno != ENOENT) + msg_fatal("remove directory %s: %m", path); + } else { + if (msg_verbose) + msg_info("remove directory %s", path); + } + return (ret); +} + +/* delete_one - delete one message instance and all its associated files */ + +static void delete_one(const char **queue_names, const char *queue_id) +{ + struct stat st; + const char **msg_qpp; + const char **log_qpp; + const char *msg_path; + VSTRING *log_path_buf; + int found; + int tries; + + /* + * Sanity check. No early returns beyond this point. + */ + if (!mail_queue_id_ok(queue_id)) { + msg_warn("invalid mail queue id: %s", queue_id); + return; + } + log_path_buf = vstring_alloc(100); + + /* + * Skip meta file directories. Delete trace/defer/bounce logfiles before + * deleting the corresponding message file, and only if the message file + * exists. This minimizes but does not eliminate a race condition with + * queue ID reuse which results in deleting the wrong files. + */ + for (found = 0, tries = 0; found == 0 && tries < 2; tries++) { + for (msg_qpp = queue_names; *msg_qpp != 0; msg_qpp++) { + if (!MESSAGE_QUEUE(find_queue_info(*msg_qpp))) + continue; + if (mail_open_ok(*msg_qpp, queue_id, &st, &msg_path) != MAIL_OPEN_YES) + continue; + for (log_qpp = log_queue_names; *log_qpp != 0; log_qpp++) + postremove(mail_queue_path(log_path_buf, *log_qpp, queue_id)); + if (postremove(msg_path) == 0) { + found = 1; + msg_info("%s: removed", queue_id); + break; + } /* else: maybe lost a race */ + } + } + vstring_free(log_path_buf); + message_deleted += found; +} + +/* requeue_one - requeue one message instance and delete its logfiles */ + +static void requeue_one(const char **queue_names, const char *queue_id) +{ + struct stat st; + const char **msg_qpp; + const char *old_path; + VSTRING *new_path_buf; + int found; + int tries; + struct utimbuf tbuf; + + /* + * Sanity check. No early returns beyond this point. + */ + if (!mail_queue_id_ok(queue_id)) { + msg_warn("invalid mail queue id: %s", queue_id); + return; + } + new_path_buf = vstring_alloc(100); + + /* + * Skip meta file directories. Like the mass requeue operation, we not + * delete defer or bounce logfiles, to avoid losing a race where the + * queue manager decides to bounce mail after all recipients have been + * tried. + */ + for (found = 0, tries = 0; found == 0 && tries < 2; tries++) { + for (msg_qpp = queue_names; *msg_qpp != 0; msg_qpp++) { + if (strcmp(*msg_qpp, MAIL_QUEUE_MAILDROP) == 0) + continue; + if (!MESSAGE_QUEUE(find_queue_info(*msg_qpp))) + continue; + if (mail_open_ok(*msg_qpp, queue_id, &st, &old_path) != MAIL_OPEN_YES) + continue; + (void) mail_queue_path(new_path_buf, MAIL_QUEUE_MAILDROP, queue_id); + if (postrename(old_path, STR(new_path_buf)) == 0) { + tbuf.actime = tbuf.modtime = time((time_t *) 0); + if (utime(STR(new_path_buf), &tbuf) < 0) + msg_warn("%s: reset time stamps: %m", STR(new_path_buf)); + msg_info("%s: requeued", queue_id); + found = 1; + break; + } /* else: maybe lost a race */ + } + } + vstring_free(new_path_buf); + message_requeued += found; +} + +/* hold_one - put "on hold" one message instance */ + +static void hold_one(const char **queue_names, const char *queue_id) +{ + struct stat st; + const char **msg_qpp; + const char *old_path; + VSTRING *new_path_buf; + int found; + int tries; + + /* + * Sanity check. No early returns beyond this point. + */ + if (!mail_queue_id_ok(queue_id)) { + msg_warn("invalid mail queue id: %s", queue_id); + return; + } + new_path_buf = vstring_alloc(100); + + /* + * Skip meta file directories. Like the mass requeue operation, we not + * delete defer or bounce logfiles, to avoid losing a race where the + * queue manager decides to bounce mail after all recipients have been + * tried. + * + * XXX We must not put maildrop mail on hold because that would mix already + * sanitized mail with mail that still needs to be sanitized. + */ + for (found = 0, tries = 0; found == 0 && tries < 2; tries++) { + for (msg_qpp = queue_names; *msg_qpp != 0; msg_qpp++) { + if (strcmp(*msg_qpp, MAIL_QUEUE_MAILDROP) == 0) + continue; + if (strcmp(*msg_qpp, MAIL_QUEUE_HOLD) == 0) + continue; + if (!MESSAGE_QUEUE(find_queue_info(*msg_qpp))) + continue; + if (mail_open_ok(*msg_qpp, queue_id, &st, &old_path) != MAIL_OPEN_YES) + continue; + (void) mail_queue_path(new_path_buf, MAIL_QUEUE_HOLD, queue_id); + if (postrename(old_path, STR(new_path_buf)) == 0) { + msg_info("%s: placed on hold", queue_id); + found = 1; + break; + } /* else: maybe lost a race */ + } + } + vstring_free(new_path_buf); + message_held += found; +} + +/* release_one - release one message instance that was placed "on hold" */ + +static void release_one(const char **queue_names, const char *queue_id) +{ + struct stat st; + const char **msg_qpp; + const char *old_path; + VSTRING *new_path_buf; + int found; + + /* + * Sanity check. No early returns beyond this point. + */ + if (!mail_queue_id_ok(queue_id)) { + msg_warn("invalid mail queue id: %s", queue_id); + return; + } + new_path_buf = vstring_alloc(100); + + /* + * Skip inapplicable directories. This can happen when -H is combined + * with other operations. + */ + found = 0; + for (msg_qpp = queue_names; *msg_qpp != 0; msg_qpp++) { + if (strcmp(*msg_qpp, MAIL_QUEUE_HOLD) != 0) + continue; + if (mail_open_ok(*msg_qpp, queue_id, &st, &old_path) != MAIL_OPEN_YES) + continue; + (void) mail_queue_path(new_path_buf, MAIL_QUEUE_DEFERRED, queue_id); + if (postrename(old_path, STR(new_path_buf)) == 0) { + msg_info("%s: released from hold", queue_id); + found = 1; + break; + } + } + vstring_free(new_path_buf); + message_released += found; +} + +/* expire_one - expire one message instance */ + +static void expire_one(const char **queue_names, const char *queue_id) +{ + struct stat st; + const char **msg_qpp; + const char *msg_path; + int found; + int tries; + + /* + * Sanity check. No early returns beyond this point. + */ + if (!mail_queue_id_ok(queue_id)) { + msg_warn("invalid mail queue id: %s", queue_id); + return; + } + + /* + * Skip meta file directories. + */ + for (found = 0, tries = 0; found == 0 && tries < 2; tries++) { + for (msg_qpp = queue_names; *msg_qpp != 0; msg_qpp++) { + if (!MESSAGE_QUEUE(find_queue_info(*msg_qpp))) + continue; + if (strcmp(*msg_qpp, MAIL_QUEUE_MAILDROP) == 0) + continue; + if (mail_open_ok(*msg_qpp, queue_id, &st, &msg_path) != MAIL_OPEN_YES) + continue; + if (postexpire(msg_path) == 0) { + found = 1; + msg_info("%s: expired", queue_id); + break; + } /* else: maybe lost a race */ + } + } + message_expired += found; +} + +/* exp_rel_one - expire or release one message instance */ + +static void exp_rel_one(const char **queue_names, const char *queue_id) +{ + expire_one(queue_names, queue_id); + release_one(queue_names, queue_id); +} + +/* operate_stream - operate on queue IDs given on stream */ + +static void operate_stream(VSTREAM *fp, + void (*operator) (const char **, const char *), + const char **queues) +{ + VSTRING *buf = vstring_alloc(20); + + while (vstring_get_nonl(buf, fp) != VSTREAM_EOF) + operator(queues, STR(buf)); + + vstring_free(buf); +} + +/* fix_queue_id - make message queue ID match inode number */ + +static int fix_queue_id(const char *actual_path, const char *actual_queue, + const char *actual_id, struct stat * st) +{ + VSTRING *old_path = vstring_alloc(10); + VSTRING *new_path = vstring_alloc(10); + VSTRING *new_id = vstring_alloc(10); + const char **log_qpp; + char *cp; + int ret; + + /* + * Create the new queue ID from the existing time digits and from the new + * inode number. Since we are renaming multiple files, the new name must + * be deterministic so that we can recover even when the renaming + * operation is interrupted in the middle. + */ + if (MQID_FIND_LG_INUM_SEPARATOR(cp, actual_id) == 0) { + /* Short->short queue ID. Replace the inode portion. */ + vstring_sprintf(new_id, "%.*s%s", + MQID_SH_USEC_PAD, actual_id, + get_file_id_st(st, 0)); + } else if (var_long_queue_ids) { + /* Long->long queue ID. Replace the inode portion. */ + vstring_sprintf(new_id, "%.*s%c%s", + (int) (cp - actual_id), actual_id, MQID_LG_INUM_SEP, + get_file_id_st(st, 1)); + } else { + /* Long->short queue ID. Reformat time and replace inode portion. */ + MQID_LG_GET_HEX_USEC(new_id, cp); + vstring_strcat(new_id, get_file_id_st(st, 0)); + } + + /* + * Rename logfiles before renaming the message file, so that we can + * recover when a previous attempt was interrupted. + */ + for (log_qpp = log_queue_names; *log_qpp; log_qpp++) { + mail_queue_path(old_path, *log_qpp, actual_id); + mail_queue_path(new_path, *log_qpp, STR(new_id)); + vstring_strcat(new_path, SUFFIX); + postrename(STR(old_path), STR(new_path)); + } + + /* + * Rename the message file last, so that we know that we are done with + * this message and with all its logfiles. + */ + mail_queue_path(new_path, actual_queue, STR(new_id)); + vstring_strcat(new_path, SUFFIX); + ret = postrename(actual_path, STR(new_path)); + + /* + * Clean up. + */ + vstring_free(old_path); + vstring_free(new_path); + vstring_free(new_id); + + return (ret); +} + +/* super - check queue structure, clean up, do wild-card operations */ + +static void super(const char **queues, int action) +{ + ARGV *hash_queue_names = argv_split(var_hash_queue_names, CHARS_COMMA_SP); + VSTRING *actual_path = vstring_alloc(10); + VSTRING *wanted_path = vstring_alloc(10); + struct stat st; + const char *queue_name; + SCAN_DIR *info; + char *path; + int actual_depth; + int wanted_depth; + char **cpp; + struct queue_info *qp; + unsigned long inum; + int long_name; + int error; + + /* + * This routine was originally written to do multiple mass operations in + * one pass. However this hard-coded the order of operations which became + * difficult to explain. As of Postfix 3.5 this routine is called for one + * mass operation at a time, in the user-specified order. The exception + * is that repair operations (purging stale files, queue hashing, and + * file-inode match) are combined and done before other mass operations. + */ + + /* + * Make sure every file is in the right place, clean out stale files, and + * remove non-file/non-directory objects. + */ + while ((queue_name = *queues++) != 0) { + + if (msg_verbose) + msg_info("queue: %s", queue_name); + + /* + * Look up queue-specific properties: desired hashing depth, what + * file permissions to look for, and whether or not it is desirable + * to step into subdirectories. + */ + qp = find_queue_info(queue_name); + for (cpp = hash_queue_names->argv; /* void */ ; cpp++) { + if (*cpp == 0) { + wanted_depth = 0; + break; + } + if (strcmp(*cpp, queue_name) == 0) { + wanted_depth = var_hash_queue_depth; + break; + } + } + + /* + * Sanity check. Some queues just cannot be recursive. + */ + if (wanted_depth > 0 && (qp->flags & RECURSE) == 0) + msg_fatal("%s queue must not be hashed", queue_name); + + /* + * Other per-directory initialization. + */ + info = scan_dir_open(queue_name); + actual_depth = 0; + + for (;;) { + + /* + * If we reach the end of a subdirectory, return to its parent. + * Delete subdirectories that are no longer needed. + */ + if ((path = scan_dir_next(info)) == 0) { + if (actual_depth == 0) + break; + if (actual_depth > wanted_depth) + postrmdir(scan_dir_path(info)); + scan_dir_pop(info); + actual_depth--; + continue; + } + + /* + * If we stumble upon a subdirectory, enter it, if it is + * considered safe to do so. Otherwise, try to remove the + * subdirectory at a later stage. + */ + if (strlen(path) == 1 && (qp->flags & RECURSE) != 0) { + actual_depth++; + scan_dir_push(info, path); + continue; + } + + /* + * From here on we need to keep track of operations that + * invalidate or revalidate the actual_path and path variables, + * otherwise we can hit the wrong files. + */ + vstring_sprintf(actual_path, "%s/%s", scan_dir_path(info), path); + if (lstat(STR(actual_path), &st) < 0) + continue; + + /* + * Remove alien directories. If maildrop is compromised, then we + * cannot abort just because we cannot remove someone's + * directory. + */ + if (S_ISDIR(st.st_mode)) { + if (rmdir(STR(actual_path)) < 0) { + if (errno != ENOENT) + msg_warn("remove subdirectory %s: %m", STR(actual_path)); + } else { + if (msg_verbose) + msg_info("remove subdirectory %s", STR(actual_path)); + } + /* No further work on this object is possible. */ + continue; + } + + /* + * Mass deletion. We count the deletion of mail that this system + * has taken responsibility for. XXX This option does not use + * mail_queue_remove(), so that it can avoid having to first move + * queue files to the "right" subdirectory level. + */ + if (action & ACTION_DELETE_ALL) { + if (postremove(STR(actual_path)) == 0) + if (MESSAGE_QUEUE(qp) && READY_MESSAGE(st)) + message_deleted++; + /* No further work on this object is possible. */ + continue; + } + + /* + * Remove non-file objects and old temporary files. Be careful + * not to delete bounce or defer logs just because they are more + * than a couple days old. + */ + if (!S_ISREG(st.st_mode) + || ((action & ACTION_PURGE) != 0 + && MESSAGE_QUEUE(qp) + && !READY_MESSAGE(st) + && time((time_t *) 0) > st.st_mtime + MAX_TEMP_AGE)) { + (void) postremove(STR(actual_path)); + /* No further work on this object is possible. */ + continue; + } + + /* + * Fix queueid#FIX names that were left from a previous pass over + * the queue where message queue file names were matched to their + * inode number. We strip the suffix and move the file into the + * proper subdirectory level. Make sure that the name minus + * suffix is well formed and that the name matches the file inode + * number. + */ + if ((action & ACTION_STRUCT) + && strcmp(path + (strlen(path) - SUFFIX_LEN), SUFFIX) == 0) { + path[strlen(path) - SUFFIX_LEN] = 0; /* XXX */ + if (!mail_queue_id_ok(path)) { + msg_warn("bogus file name: %s", STR(actual_path)); + continue; + } + if (MESSAGE_QUEUE(qp)) { + MQID_GET_INUM(path, inum, long_name, error); + if (error) { + msg_warn("bogus file name: %s", STR(actual_path)); + continue; + } + if (inum != (unsigned long) st.st_ino) { + msg_warn("name/inode mismatch: %s", STR(actual_path)); + continue; + } + } + (void) mail_queue_path(wanted_path, queue_name, path); + if (postrename(STR(actual_path), STR(wanted_path)) < 0) { + /* No further work on this object is possible. */ + continue; + } else { + if (MESSAGE_QUEUE(qp)) + inode_fixed++; + vstring_strcpy(actual_path, STR(wanted_path)); + /* At this point, path and actual_path are revalidated. */ + } + } + + /* + * Skip over files with illegal names. The library routines + * refuse to operate on them. + */ + if (!mail_queue_id_ok(path)) { + msg_warn("bogus file name: %s", STR(actual_path)); + continue; + } + + /* + * See if the file name matches the file inode number. Skip meta + * file directories. This option requires that meta files be put + * into their proper place before queue files, so that we can + * rename queue files and meta files at the same time. Mis-named + * files are renamed to newqueueid#FIX on the first pass, and + * upon the second pass the #FIX is stripped off the name. Of + * course we have to be prepared that the program is interrupted + * before it completes, so any left-over newqueueid#FIX files + * have to be handled properly. XXX This option cannot use + * mail_queue_rename(), because the queue file name violates + * normal queue file syntax. + * + * By design there is no need to "fix" non-repeating names. What + * follows is applicable only when reverting from long names to + * short names, or when migrating short names from one queue to + * another. + */ + if ((action & ACTION_STRUCT) != 0 && MESSAGE_QUEUE(qp)) { + MQID_GET_INUM(path, inum, long_name, error); + if (error) { + msg_warn("bogus file name: %s", STR(actual_path)); + continue; + } + if ((long_name != 0 && var_long_queue_ids == 0) + || (inum != (unsigned long) st.st_ino + && (long_name == 0 || (action & ACTION_STRUCT_RED)))) { + inode_mismatch++; /* before we fix */ + action &= ~ACTIONS_BY_WILDCARD; + fix_queue_id(STR(actual_path), queue_name, path, &st); + /* At this point, path and actual_path are invalidated. */ + continue; + } + } + + /* + * Mass requeuing. The pickup daemon will copy requeued mail to a + * new queue file, so that address rewriting is applied again. + * XXX This option does not use mail_queue_rename(), so that it + * can avoid having to first move queue files to the "right" + * subdirectory level. Like the requeue_one() routine, this code + * does not touch logfiles. + */ + if ((action & ACTION_REQUEUE_ALL) + && MESSAGE_QUEUE(qp) + && strcmp(queue_name, MAIL_QUEUE_MAILDROP) != 0) { + (void) mail_queue_path(wanted_path, MAIL_QUEUE_MAILDROP, path); + if (postrename(STR(actual_path), STR(wanted_path)) == 0) + message_requeued++; + /* At this point, path and actual_path are invalidated. */ + continue; + } + + /* + * Many of the following actions may move queue files. To avoid + * loss of email due to file name collisions. we should do such + * actions only when the queue file names are known to match + * their inode number. Even with non-repeating queue IDs a name + * collision may happen when different queues are merged. + */ + + /* + * Mass expiration. We count the expiration of mail that this + * system has taken responsibility for. + */ + if ((action & (ACTION_EXPIRE_ALL | ACTION_EXP_REL_ALL)) + && MESSAGE_QUEUE(qp) && READY_MESSAGE(st) + && strcmp(queue_name, MAIL_QUEUE_MAILDROP) != 0 + && postexpire(STR(actual_path)) == 0) + message_expired++; + + /* + * Mass renaming to the "on hold" queue. XXX This option does not + * use mail_queue_rename(), so that it can avoid having to first + * move queue files to the "right" subdirectory level. Like the + * hold_one() routine, this code does not touch logfiles, and + * must not touch files in the maildrop queue, because maildrop + * files contain data that has not yet been sanitized and + * therefore must not be mixed with already sanitized mail. + */ + if ((action & ACTION_HOLD_ALL) + && MESSAGE_QUEUE(qp) + && strcmp(queue_name, MAIL_QUEUE_MAILDROP) != 0 + && strcmp(queue_name, MAIL_QUEUE_HOLD) != 0) { + (void) mail_queue_path(wanted_path, MAIL_QUEUE_HOLD, path); + if (postrename(STR(actual_path), STR(wanted_path)) == 0) + message_held++; + /* At this point, path and actual_path are invalidated. */ + continue; + } + + /* + * Mass release from the "on hold" queue. XXX This option does + * not use mail_queue_rename(), so that it can avoid having to + * first move queue files to the "right" subdirectory level. Like + * the release_one() routine, this code must not touch logfiles. + */ + if ((action & (ACTION_RELEASE_ALL | ACTION_EXP_REL_ALL)) + && strcmp(queue_name, MAIL_QUEUE_HOLD) == 0) { + (void) mail_queue_path(wanted_path, MAIL_QUEUE_DEFERRED, path); + if (postrename(STR(actual_path), STR(wanted_path)) == 0) + message_released++; + /* At this point, path and actual_path are invalidated. */ + continue; + } + + /* + * See if this file sits in the right place in the file system + * hierarchy. Its place may be wrong after a change to the + * hash_queue_{names,depth} parameter settings. This requires + * that the bounce/defer logfiles be at the right subdirectory + * level first, otherwise we would fail to properly rename + * bounce/defer logfiles. + */ + if (action & ACTION_STRUCT) { + (void) mail_queue_path(wanted_path, queue_name, path); + if (strcmp(STR(actual_path), STR(wanted_path)) != 0) { + position_mismatch++; /* before we fix */ + (void) postrename(STR(actual_path), STR(wanted_path)); + /* At this point, path and actual_path are invalidated. */ + continue; + } + } + } + scan_dir_close(info); + } + + /* + * Clean up. + */ + vstring_free(wanted_path); + vstring_free(actual_path); + argv_free(hash_queue_names); +} + +/* interrupted - signal handler */ + +static void interrupted(int sig) +{ + + /* + * This commands requires root privileges. We therefore do not worry + * about hostile signals, and report problems via msg_warn(). + * + * We use the in-kernel SIGINT handler address as an atomic variable to + * prevent nested interrupted() calls. For this reason, main() must + * configure interrupted() as SIGINT handler before other signal handlers + * are allowed to invoke interrupted(). See also similar code in + * postdrop. + */ + if (signal(SIGINT, SIG_IGN) != SIG_IGN) { + (void) signal(SIGQUIT, SIG_IGN); + (void) signal(SIGTERM, SIG_IGN); + (void) signal(SIGHUP, SIG_IGN); + if (inode_mismatch > 0 || inode_fixed > 0 || position_mismatch > 0) + msg_warn("OPERATION INCOMPLETE -- RERUN COMMAND TO FIX THE QUEUE FIRST"); + if (sig) + _exit(sig); + } +} + +/* fatal_warning - print warning if queue fix is incomplete */ + +static void fatal_warning(void) +{ + interrupted(0); +} + +MAIL_VERSION_STAMP_DECLARE; + +int main(int argc, char **argv) +{ + int fd; + struct stat st; + char *slash; + int action = 0; + const char **queues; + int c; + ARGV *import_env; + int saved_optind; + + /* + * Defaults. The structural checks must fix the directory levels of "log + * file" directories (bounce, defer) before doing structural checks on + * the "message file" directories, so that we can find the logfiles in + * the right place when message files need to be renamed to match their + * inode number. + */ + static char *default_queues[] = { + MAIL_QUEUE_DEFER, /* before message directories */ + MAIL_QUEUE_BOUNCE, /* before message directories */ + MAIL_QUEUE_MAILDROP, + MAIL_QUEUE_INCOMING, + MAIL_QUEUE_ACTIVE, + MAIL_QUEUE_DEFERRED, + MAIL_QUEUE_HOLD, + MAIL_QUEUE_FLUSH, + 0, + }; + + /* + * 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 this environment option as early as we can, to aid debugging. + */ + if (safe_getenv(CONF_ENV_VERB)) + msg_verbose = 1; + + /* + * Initialize logging. + */ + 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_LOGWRITER_FALLBACK); + 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; + + /* + * Disallow unsafe practices, and refuse to run set-uid (or as the child + * of a set-uid process). Whenever a privileged wrapper program is + * needed, it must properly sanitize the real/effective/saved UID/GID, + * the secondary groups, the process environment, and so on. Otherwise, + * accidents can happen. If not with Postfix, then with other software. + */ + if (unsafe() != 0) + msg_fatal("this postfix command must not run as a set-uid process"); + if (getuid()) + msg_fatal("use of this command is reserved for the superuser"); + + /* + * Parse JCL. + * + * First, find out what kind of actions are requested, without executing + * them. Later, we execute actions in mostly user-specified order. + */ +#define GETOPT_LIST "c:d:e:f:h:H:pr:sSv" + + saved_optind = optind; + while ((c = GETOPT(argc, argv, GETOPT_LIST)) > 0) { + switch (c) { + default: + msg_fatal("usage: %s " + "[-c config_dir] " + "[-d queue_id (delete)] " + "[-e queue_id (expire)] " + "[-f queue_id (expire and/or un-hold)] " + "[-h queue_id (hold)] [-H queue_id (un-hold)] " + "[-p (purge temporary files)] [-r queue_id (requeue)] " + "[-s (structure fix)] [-S (redundant structure fix)]" + "[-v (verbose)] [queue...]", argv[0]); + case 'c': + if (*optarg != '/') + msg_fatal("-c requires absolute pathname"); + if (setenv(CONF_ENV_PATH, optarg, 1) < 0) + msg_fatal("setenv: %m"); + break; + case 'd': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_DELETE_ALL : ACTION_DELETE_ONE); + break; + case 'e': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_EXPIRE_ALL : ACTION_EXPIRE_ONE); + break; + case 'f': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_EXP_REL_ALL : ACTION_EXP_REL_ONE); + break; + case 'h': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_HOLD_ALL : ACTION_HOLD_ONE); + break; + case 'H': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_RELEASE_ALL : ACTION_RELEASE_ONE); + break; + case 'p': + action |= ACTION_PURGE; + break; + case 'r': + action |= (strcmp(optarg, "ALL") == 0 ? + ACTION_REQUEUE_ALL : ACTION_REQUEUE_ONE); + break; + case 'S': + action |= ACTION_STRUCT_RED; + /* FALLTHROUGH */ + case 's': + action |= ACTION_STRUCT; + break; + case 'v': + msg_verbose++; + break; + } + } + + /* + * Read the global configuration file and extract configuration + * information. The -c command option can override the default + * configuration directory location. + */ + 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_LOGWRITER_FALLBACK); + if (chdir(var_queue_dir)) + msg_fatal("chdir %s: %m", var_queue_dir); + + /* + * All file/directory updates must be done as the mail system owner. This + * is because Postfix daemons manipulate the queue with those same + * privileges, so directories must be created with the right ownership. + * + * Running as a non-root user is also required for security reasons. When + * the Postfix queue hierarchy is compromised, an attacker could trick us + * into entering other file hierarchies and afflicting damage. Running as + * a non-root user limits the damage to the already compromised mail + * owner. + */ + set_ugid(var_owner_uid, var_owner_gid); + + /* + * Be sure to log a warning if we do not finish structural repair. Maybe + * we should have an fsck-style "clean" flag so Postfix will not start + * with a broken queue. + * + * Set up signal handlers after permanently dropping super-user privileges, + * so that signal handlers will always run with the correct privileges. + * + * XXX Don't enable SIGHUP or SIGTERM if it was ignored by the parent. + * + * interrupted() uses the in-kernel SIGINT handler address as an atomic + * variable to prevent nested interrupted() calls. For this reason, the + * SIGINT handler must be configured before other signal handlers are + * allowed to invoke interrupted(). See also similar code in postdrop. + */ + signal(SIGINT, interrupted); + signal(SIGQUIT, interrupted); + if (signal(SIGTERM, SIG_IGN) == SIG_DFL) + signal(SIGTERM, interrupted); + if (signal(SIGHUP, SIG_IGN) == SIG_DFL) + signal(SIGHUP, interrupted); + msg_cleanup(fatal_warning); + + /* + * Execute the explicitly specified (or default) action, on the + * explicitly specified (or default) queues. + * + * XXX Work around gcc const brain damage. + * + * XXX The file name/inode number fix should always run over all message + * file directories, and should always be preceded by a subdirectory + * level check of the bounce and defer logfile directories. + */ + if (action == 0) + action = ACTION_DEFAULT; + if (argv[optind] != 0) + queues = (const char **) argv + optind; + else + queues = (const char **) default_queues; + + /* + * Basic queue maintenance, including mass name-to-inode fixing. This + * ensures that queue files are in the right place before any other + * operations are done. + */ + if (action & ACTIONS_FOR_REPAIR) + super(queues, action & ACTIONS_FOR_REPAIR); + + /* + * If any file names needed changing to match the message file inode + * number, those files were named newqeueid#FIX. We need a second pass to + * strip the suffix from the new queue ID, and to complete any requested + * operations that had to be skipped in the first pass. + */ + if (inode_mismatch > 0) + super(queues, action & ACTIONS_FOR_REPAIR); + + /* + * Don't do actions by queue file name if any queue files changed name + * because they did not match the queue file inode number. We could be + * acting on the wrong queue file and lose mail. + */ + if ((action & ACTIONS_BY_QUEUE_ID) + && (inode_mismatch > 0 || inode_fixed > 0)) { + msg_error("QUEUE FILE NAMES WERE CHANGED TO MATCH INODE NUMBERS"); + msg_fatal("CHECK YOUR QUEUE IDS AND RE-ISSUE THE COMMAND"); + } + + /* + * Execute actions by queue ID and by wildcard in the user-specified + * order. + */ + optind = saved_optind; + while ((c = GETOPT(argc, argv, GETOPT_LIST)) > 0) { + switch (c) { + default: + msg_panic("%s: unexpected option: %c", argv[0], c); + case 'c': + case 'p': + case 'S': + case 's': + case 'v': + /* Already handled. */ + break; + case 'd': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_DELETE_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, delete_one, queues); + else + delete_one(queues, optarg); + break; + case 'e': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_EXPIRE_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, expire_one, queues); + else + expire_one(queues, optarg); + break; + case 'f': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_EXP_REL_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, exp_rel_one, queues); + else + exp_rel_one(queues, optarg); + break; + case 'h': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_HOLD_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, hold_one, queues); + else + hold_one(queues, optarg); + break; + case 'H': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_RELEASE_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, release_one, queues); + else + release_one(queues, optarg); + break; + case 'r': + if (strcmp(optarg, "ALL") == 0) + super(queues, ACTION_REQUEUE_ALL); + else if (strcmp(optarg, "-") == 0) + operate_stream(VSTREAM_IN, requeue_one, queues); + else + requeue_one(queues, optarg); + break; + } + } + + /* + * Report. + */ + if (action & (ACTION_REQUEUE_ONE | ACTION_REQUEUE_ALL)) + msg_info("Requeued: %d message%s", message_requeued, + message_requeued != 1 ? "s" : ""); + if (action & (ACTION_DELETE_ONE | ACTION_DELETE_ALL)) + msg_info("Deleted: %d message%s", message_deleted, + message_deleted != 1 ? "s" : ""); + if (action & (ACTION_EXPIRE_ONE | ACTION_EXPIRE_ALL + | ACTION_EXP_REL_ONE | ACTION_EXP_REL_ALL)) + msg_info("Force-expired: %d message%s", message_expired, + message_expired != 1 ? "s" : ""); + if (action & (ACTION_HOLD_ONE | ACTION_HOLD_ALL)) + msg_info("Placed on hold: %d message%s", + message_held, message_held != 1 ? "s" : ""); + if (action & (ACTION_RELEASE_ONE | ACTION_RELEASE_ALL + | ACTION_EXP_REL_ONE | ACTION_EXP_REL_ALL)) + msg_info("Released from hold: %d message%s", + message_released, message_released != 1 ? "s" : ""); + if (inode_fixed > 0) + msg_info("Renamed to match inode number: %d message%s", inode_fixed, + inode_fixed != 1 ? "s" : ""); + if (inode_mismatch > 0 || inode_fixed > 0) + msg_warn("QUEUE FILE NAMES WERE CHANGED TO MATCH INODE NUMBERS"); + + exit(0); +} |