Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 283 insertions, 0 deletions

diff --git a/src/virtual/mailbox.c b/src/virtual/mailbox.c
new file mode 100644
index 0000000..19afca8
--- /dev/null
+++ b/src/virtual/mailbox.c
@@ -0,0 +1,283 @@
+/*++
+/* NAME
+/*	mailbox 3
+/* SUMMARY
+/*	mailbox delivery
+/* SYNOPSIS
+/*	#include "virtual.h"
+/*
+/*	int	deliver_mailbox(state, usr_attr, statusp)
+/*	LOCAL_STATE state;
+/*	USER_ATTR usr_attr;
+/*	int	*statusp;
+/* DESCRIPTION
+/*	deliver_mailbox() delivers to UNIX-style mailbox or to maildir.
+/*
+/*	A zero result means that the named user was not found.
+/*
+/*	Arguments:
+/* .IP state
+/*	The attributes that specify the message, recipient and more.
+/* .IP usr_attr
+/*	Attributes describing user rights and mailbox location.
+/* .IP statusp
+/*	Delivery status: see below.
+/* DIAGNOSTICS
+/*	The message delivery status is non-zero when delivery should be tried
+/*	again.
+/* 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 <errno.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <mymalloc.h>
+#include <stringops.h>
+#include <set_eugid.h>
+
+/* Global library. */
+
+#include <mail_copy.h>
+#include <mbox_open.h>
+#include <defer.h>
+#include <sent.h>
+#include <mail_params.h>
+#include <mail_addr_find.h>
+#include <dsn_util.h>
+
+/* Application-specific. */
+
+#include "virtual.h"
+
+#define YES	1
+#define NO	0
+
+/* deliver_mailbox_file - deliver to recipient mailbox */
+
+static int deliver_mailbox_file(LOCAL_STATE state, USER_ATTR usr_attr)
+{
+    const char *myname = "deliver_mailbox_file";
+    DSN_BUF *why = state.msg_attr.why;
+    MBOX   *mp;
+    int     mail_copy_status;
+    int     deliver_status;
+    int     copy_flags;
+    struct stat st;
+
+    /*
+     * Make verbose logging easier to understand.
+     */
+    state.level++;
+    if (msg_verbose)
+	MSG_LOG_STATE(myname, state);
+
+    /*
+     * Don't deliver trace-only requests.
+     */
+    if (DEL_REQ_TRACE_ONLY(state.request->flags)) {
+	dsb_simple(why, "2.0.0", "delivers to mailbox");
+	return (sent(BOUNCE_FLAGS(state.request),
+		     SENT_ATTR(state.msg_attr)));
+    }
+
+    /*
+     * Initialize. Assume the operation will fail. Set the delivered
+     * attribute to reflect the final recipient.
+     */
+    if (vstream_fseek(state.msg_attr.fp, state.msg_attr.offset, SEEK_SET) < 0)
+	msg_fatal("seek message file %s: %m", VSTREAM_PATH(state.msg_attr.fp));
+    state.msg_attr.delivered = state.msg_attr.rcpt.address;
+    mail_copy_status = MAIL_COPY_STAT_WRITE;
+
+    /*
+     * Lock the mailbox and open/create the mailbox file.
+     * 
+     * Write the file as the recipient, so that file quota work.
+     */
+    copy_flags = MAIL_COPY_MBOX;
+
+    set_eugid(usr_attr.uid, usr_attr.gid);
+    mp = mbox_open(usr_attr.mailbox, O_APPEND | O_WRONLY | O_CREAT,
+		   S_IRUSR | S_IWUSR, &st, -1, -1,
+		   virtual_mbox_lock_mask, "4.2.0", why);
+    if (mp != 0) {
+	if (S_ISREG(st.st_mode) == 0) {
+	    vstream_fclose(mp->fp);
+	    msg_warn("recipient %s: destination %s is not a regular file",
+		     state.msg_attr.rcpt.address, usr_attr.mailbox);
+	    dsb_simple(why, "5.3.5", "mail system configuration error");
+	} else if (var_strict_mbox_owner && st.st_uid != usr_attr.uid) {
+	    vstream_fclose(mp->fp);
+	    dsb_simple(why, "4.2.0",
+	      "destination %s is not owned by recipient", usr_attr.mailbox);
+	    msg_warn("specify \"%s = no\" to ignore mailbox ownership mismatch",
+		     VAR_STRICT_MBOX_OWNER);
+	} else {
+	    if (vstream_fseek(mp->fp, (off_t) 0, SEEK_END) < 0)
+		msg_fatal("%s: seek mailbox file %s: %m",
+			  myname, VSTREAM_PATH(mp->fp));
+	    mail_copy_status = mail_copy(COPY_ATTR(state.msg_attr), mp->fp,
+					 copy_flags, "\n", why);
+	}
+	mbox_release(mp);
+    }
+    set_eugid(var_owner_uid, var_owner_gid);
+
+    /*
+     * As the mail system, bounce, defer delivery, or report success.
+     */
+    if (mail_copy_status & MAIL_COPY_STAT_CORRUPT) {
+	deliver_status = DEL_STAT_DEFER;
+    } else if (mail_copy_status != 0) {
+	vstring_sprintf_prepend(why->reason, "delivery failed to mailbox %s: ",
+				usr_attr.mailbox);
+	deliver_status =
+	    (STR(why->status)[0] == '4' ?
+	     defer_append : bounce_append)
+	    (BOUNCE_FLAGS(state.request),
+	     BOUNCE_ATTR(state.msg_attr));
+    } else {
+	dsb_simple(why, "2.0.0", "delivered to mailbox");
+	deliver_status = sent(BOUNCE_FLAGS(state.request),
+			      SENT_ATTR(state.msg_attr));
+    }
+    return (deliver_status);
+}
+
+/* deliver_mailbox - deliver to recipient mailbox */
+
+int     deliver_mailbox(LOCAL_STATE state, USER_ATTR usr_attr, int *statusp)
+{
+    const char *myname = "deliver_mailbox";
+    const char *mailbox_res;
+    const char *uid_res;
+    const char *gid_res;
+    DSN_BUF *why = state.msg_attr.why;
+    long    n;
+
+    /*
+     * Make verbose logging easier to understand.
+     */
+    state.level++;
+    if (msg_verbose)
+	MSG_LOG_STATE(myname, state);
+
+    /*
+     * Sanity check.
+     */
+    if (*var_virt_mailbox_base != '/')
+	msg_fatal("do not specify relative pathname: %s = %s",
+		  VAR_VIRT_MAILBOX_BASE, var_virt_mailbox_base);
+
+    /*
+     * Look up the mailbox location. Bounce if not found, defer in case of
+     * trouble.
+     */
+#define IGNORE_EXTENSION ((char **) 0)
+
+    mailbox_res = mail_addr_find(virtual_mailbox_maps, state.msg_attr.user,
+				 IGNORE_EXTENSION);
+    if (mailbox_res == 0) {
+	if (virtual_mailbox_maps->error == 0)
+	    return (NO);
+	msg_warn("table %s: lookup %s: %m", virtual_mailbox_maps->title,
+		 state.msg_attr.user);
+	dsb_simple(why, "4.3.5", "mail system configuration error");
+	*statusp = defer_append(BOUNCE_FLAGS(state.request),
+				BOUNCE_ATTR(state.msg_attr));
+	return (YES);
+    }
+    usr_attr.mailbox = concatenate(var_virt_mailbox_base, "/",
+				   mailbox_res, (char *) 0);
+
+#define RETURN(res) { myfree(usr_attr.mailbox); return (res); }
+
+    /*
+     * Look up the mailbox owner rights. Defer in case of trouble.
+     */
+    uid_res = mail_addr_find(virtual_uid_maps, state.msg_attr.user,
+			     IGNORE_EXTENSION);
+    if (uid_res == 0) {
+	msg_warn("recipient %s: not found in %s",
+		 state.msg_attr.user, virtual_uid_maps->title);
+	dsb_simple(why, "4.3.5", "mail system configuration error");
+	*statusp = defer_append(BOUNCE_FLAGS(state.request),
+				BOUNCE_ATTR(state.msg_attr));
+	RETURN(YES);
+    }
+    if ((n = atol(uid_res)) < var_virt_minimum_uid) {
+	msg_warn("recipient %s: bad uid %s in %s",
+		 state.msg_attr.user, uid_res, virtual_uid_maps->title);
+	dsb_simple(why, "4.3.5", "mail system configuration error");
+	*statusp = defer_append(BOUNCE_FLAGS(state.request),
+				BOUNCE_ATTR(state.msg_attr));
+	RETURN(YES);
+    }
+    usr_attr.uid = (uid_t) n;
+
+    /*
+     * Look up the mailbox group rights. Defer in case of trouble.
+     */
+    gid_res = mail_addr_find(virtual_gid_maps, state.msg_attr.user,
+			     IGNORE_EXTENSION);
+    if (gid_res == 0) {
+	msg_warn("recipient %s: not found in %s",
+		 state.msg_attr.user, virtual_gid_maps->title);
+	dsb_simple(why, "4.3.5", "mail system configuration error");
+	*statusp = defer_append(BOUNCE_FLAGS(state.request),
+				BOUNCE_ATTR(state.msg_attr));
+	RETURN(YES);
+    }
+    if ((n = atol(gid_res)) <= 0) {
+	msg_warn("recipient %s: bad gid %s in %s",
+		 state.msg_attr.user, gid_res, virtual_gid_maps->title);
+	dsb_simple(why, "4.3.5", "mail system configuration error");
+	*statusp = defer_append(BOUNCE_FLAGS(state.request),
+				BOUNCE_ATTR(state.msg_attr));
+	RETURN(YES);
+    }
+    usr_attr.gid = (gid_t) n;
+
+    if (msg_verbose)
+	msg_info("%s[%d]: set user_attr: %s, uid = %u, gid = %u",
+		 myname, state.level, usr_attr.mailbox,
+		 (unsigned) usr_attr.uid, (unsigned) usr_attr.gid);
+
+    /*
+     * Deliver to mailbox or to maildir.
+     */
+#define LAST_CHAR(s) (s[strlen(s) - 1])
+
+    if (LAST_CHAR(usr_attr.mailbox) == '/')
+	*statusp = deliver_maildir(state, usr_attr);
+    else
+	*statusp = deliver_mailbox_file(state, usr_attr);
+
+    /*
+     * Cleanup.
+     */
+    RETURN(YES);
+}