Merge branch 'isync_1_2_branch'

README

@@ -14,11 +14,13 @@ currently Maildir and IMAP4 mailboxes are supported. New messages, message
 deletions and flag changes can be propagated both ways.
 ``mbsync'' is suitable for use in IMAP-disconnected mode.
 
-Synchronization is based on unique message identifiers (UIDs), so no
-identification conflicts can occur (as opposed to some other mail
+Synchronization is based on unique message identifiers (UIDs), so
+no identification conflicts can occur (unlike with some other mail
 synchronizers).
 Synchronization state is kept in one local text file per mailbox pair;
-multiple replicas of a mailbox can be maintained.
+these files are protected against concurrent ``mbsync'' processes.
+Mailboxes can be safely modified while ``mbsync'' operates.
+Multiple replicas of each mailbox can be maintained.
 
 isync is the project name, while mbsync is the current executable name; this
 change was necessary because of massive changes in the user interface. An
@@ -31,9 +33,8 @@ isync executable still exists; it is a compatibility wrapper around mbsync.
     * Partial mirrors possible: keep only the latest messages locally
     * Trash functionality: backup messages before removing them
     * IMAP features:
-	* Supports TLS/SSL via imaps: (port 993) and STARTTLS (RFC2595)
-	* Supports SASL (RFC4422) for authentication
-	* Supports NAMESPACE (RFC2342) for simplified configuration
+	* Supports TLS/SSL via imaps: (port 993) and STARTTLS
+	* Supports SASL for authentication
 	* Pipelining for maximum speed
 
 * Compatibility
@@ -66,6 +67,8 @@ isync executable still exists; it is a compatibility wrapper around mbsync.
 
     Berkeley DB 4.1+ (optional)
     OpenSSL for TLS/SSL support (optional)
+    Cyrus SASL (optional)
+    zlib (optional)
 
 * Installation
 

configure.ac

@@ -36,10 +36,10 @@ AC_CHECK_LIB(nsl, inet_ntoa, [SOCK_LIBS="$SOCK_LIBS -lnsl"])
 AC_SUBST(SOCK_LIBS)
 
 have_ipv6=true
-sav_LDFLAGS=$LDFLAGS
-LDFLAGS="$LDFLAGS $SOCK_LIBS"
+sav_LIBS=$LIBS
+LIBS="$LIBS $SOCK_LIBS"
 AC_CHECK_FUNCS(getaddrinfo inet_ntop, , [have_ipv6=false])
-LDFLAGS=$sav_LDFLAGS
+LIBS=$sav_LIBS
 if $have_ipv6; then
     AC_DEFINE(HAVE_IPV6, 1, [if your libc has IPv6 support])
 fi
@@ -141,15 +141,15 @@ AC_SUBST(SASL_LIBS)
 
 AC_CACHE_CHECK([for Berkeley DB >= 4.1], ac_cv_berkdb4,
   [ac_cv_berkdb4=no
-    sav_LDFLAGS=$LDFLAGS
-    LDFLAGS="$LDFLAGS -ldb"
+    sav_LIBS=$LIBS
+    LIBS="$LIBS -ldb"
    AC_TRY_LINK([#include <db.h>],
                [DB *db;
 	        db_create(&db, 0, 0);
 	        db->truncate(db, 0, 0, 0);
 	        db->open(db, 0, "foo", "foo", DB_HASH, DB_CREATE, 0)],
 	       [ac_cv_berkdb4=yes])
-    LDFLAGS=$sav_LDFLAGS
+    LIBS=$sav_LIBS
   ])
 if test "x$ac_cv_berkdb4" = xyes; then
   AC_SUBST([DB_LIBS], ["-ldb"])

src/common.h

@@ -116,6 +116,7 @@ void *memrchr( const void *s, int c, size_t n );
 #endif
 
 int starts_with( const char *str, int strl, const char *cmp, int cmpl );
+int starts_with_upper( const char *str, int strl, const char *cmp, int cmpl );
 int equals( const char *str, int strl, const char *cmp, int cmpl );
 
 #ifndef HAVE_TIMEGM

src/compat/isync.1

@@ -259,7 +259,12 @@ established with the IMAP server.  (Default: \fIyes\fR)
 ..
 .TP
 \fBCertificateFile\fR \fIpath\fR
-File containing X.509 CA certificates used to verify server identities.
+File containing additional X.509 certificates used to verify server
+identities. Directly matched peer certificates are always trusted,
+regardless of validity.
+.br
+Note that the system's default certificate store is always used
+and should not be specified here.
 ..
 .TP
 \fBUseSSLv2\fR \fIyes\fR|\fIno\fR

src/compat/isyncrc.sample

@@ -3,7 +3,7 @@
 #   doesn't specify it.
 
 # SSL server certificate file
-CertificateFile /etc/ssl/certs/ca-certificates.crt
+CertificateFile ~/.isync.certs
 
 # by default, expunge deleted messages (same as -e on command line)
 Expunge yes

src/drv_imap.c

@@ -971,7 +971,7 @@ parse_fetch_rsp( imap_store_t *ctx, list_t *list, char *s ATTR_UNUSED )
 					tmp = tmp->next;
 					if (!is_atom( tmp ))
 						goto bfail;
-					if (starts_with( tmp->val, tmp->len, "X-TUID: ", 8 ))
+					if (starts_with_upper( tmp->val, tmp->len, "X-TUID: ", 8 ))
 						tuid = tmp->val + 8;
 				} else {
 				  bfail:

src/drv_maildir.c

@@ -33,15 +33,10 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <sys/stat.h>
-#include <sys/file.h>
 #include <errno.h>
 #include <time.h>
 #include <utime.h>
 
-#ifdef __linux__
-# define LEGACY_FLOCK 1
-#endif
-
 #if !defined(_POSIX_SYNCHRONIZED_IO) || _POSIX_SYNCHRONIZED_IO <= 0
 # define fdatasync fsync
 #endif
@@ -621,13 +616,6 @@ maildir_uidval_lock( maildir_store_t *ctx )
 		/* The unlock timer is active, so we are obviously already locked. */
 		return DRV_OK;
 	}
-#ifdef LEGACY_FLOCK
-	/* This is legacy only */
-	if (flock( ctx->uvfd, LOCK_EX ) < 0) {
-		error( "Maildir error: cannot flock UIDVALIDITY.\n" );
-		return DRV_BOX_BAD;
-	}
-#endif
 	/* This (theoretically) works over NFS. Let's hope nobody else did
 	   the same in the opposite order, as we'd deadlock then. */
 #if SEEK_SET != 0
@@ -699,10 +687,6 @@ maildir_uidval_unlock( maildir_store_t *ctx )
 #endif /* USE_DB */
 	lck.l_type = F_UNLCK;
 	fcntl( ctx->uvfd, F_SETLK, &lck );
-#ifdef LEGACY_FLOCK
-	/* This is legacy only */
-	flock( ctx->uvfd, LOCK_UN );
-#endif
 }
 
 static void

src/mbsync.1

@@ -35,11 +35,14 @@ New messages, message deletions and flag changes can be propagated both ways;
 the operation set can be selected in a fine-grained manner.
 .br
 Synchronization is based on unique message identifiers (UIDs), so no
-identification conflicts can occur (as opposed to some other mail synchronizers).
+identification conflicts can occur (unlike with some other mail synchronizers).
 OTOH, \fBmbsync\fR is susceptible to UID validity changes (that \fIshould\fR
 never happen, but see "Compatibility" in the README).
 Synchronization state is kept in one local text file per mailbox pair;
-multiple replicas of a mailbox can be maintained.
+these files are protected against concurrent \fBmbsync\fR processes.
+Mailboxes can be safely modified while \fBmbsync\fR operates
+(see \fBINHERENT PROBLEMS\fR below for a minor exception).
+Multiple replicas of each mailbox can be maintained.
 ..
 .SH OPTIONS
 .TP

src/mbsyncrc.sample

@@ -26,7 +26,6 @@ Pass xxxxxxxx
 #  "Account Name" USERNAME
 #  "Password" PASSWORD
 #PassCmd "/usr/bin/security find-internet-password -w -a USERNAME -s IMAPSERVER ~/Library/Keychains/login.keychain"
-CertificateFile /etc/ssl/certs/ca-certificates.crt
 
 Channel work
 Master :work:

src/sync.c

@@ -338,7 +338,7 @@ msg_fetched( int sts, void *aux )
 					if (c == '\r')
 						lcrs++;
 					else if (c == '\n') {
-						if (starts_with( fmap + start, len - start, "X-TUID: ", 8 )) {
+						if (starts_with_upper( fmap + start, len - start, "X-TUID: ", 8 )) {
 							extra = (sbreak = start) - (ebreak = i);
 							goto oke;
 						}

src/util.c

@@ -27,6 +27,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <ctype.h>
 #include <pwd.h>
 
 static int need_nl;
@@ -241,6 +242,21 @@ starts_with( const char *str, int strl, const char *cmp, int cmpl )
 	return (strl >= cmpl) && !memcmp( str, cmp, cmpl );
 }
 
+int
+starts_with_upper( const char *str, int strl, const char *cmp, int cmpl )
+{
+	int i;
+
+	if (strl < 0)
+		strl = strnlen( str, cmpl + 1 );
+	if (strl < cmpl)
+		return 0;
+	for (i = 0; i < cmpl; i++)
+		if (str[i] != cmp[i] && toupper( str[i] ) != cmp[i])
+			return 0;
+	return 1;
+}
+
 int
 equals( const char *str, int strl, const char *cmp, int cmpl )
 {