Wietse Venema:
> Wietse Venema:
> > Sascha H?depohl:
> > > Hello!
> > >
> > > i found this in maillog:
> > >
> > > postfix/bounce[90860]: warning: midna_domain_to_utf8_create: Problem
> > > translating domain "mail.huedepohl.de" to UTF8 form: U_FILE_ACCESS_ERROR
> > >
> > > i can't figure out what the problem ist.
> > > U_FILE_ACCESS_ERROR? Which file?
> >
> > According to web search for "U_FILE_ACCESS_ERROR postfix" the ICU
> > library could not access some required file. The ICU library is not
> > part of Postfix.
> >
> > Usually this is fixed by turning off chroot for the bounce daemon:
> >
> > # postconf -F bounce/unix/chroot=n defer/unix/chroot=n trace/unix/chroot=n
> > # postfix reload
>
> Fixed in Postfix 3.6, by calling some ICU library method before
> making the chroot() call.
I expect that this will be in the next stable release updates.
Wietse
20200510
Bitrot: avoid U_FILE_ACCESS_ERROR after chroot(), by
initializing the ICU library before making the chroot()
call. Files: util/midna_domain.[hc], global/mail_params.c.
diff --exclude=man --exclude=html --exclude=README_FILES --exclude=INSTALL
--exclude=.indent.pro -r -ur
/var/tmp/postfix-3.6-20200509-nonprod/src/global/mail_params.c
./src/global/mail_params.c
--- /var/tmp/postfix-3.6-20200509-nonprod/src/global/mail_params.c
2020-01-11 08:04:08.000000000 -0500
+++ ./src/global/mail_params.c 2020-05-11 09:45:42.000000000 -0400
@@ -871,6 +871,8 @@
var_smtputf8_enable = 0;
#else
midna_domain_transitional = var_idna2003_compat;
+ if (var_smtputf8_enable)
+ midna_domain_pre_chroot();
#endif
util_utf8_enable = var_smtputf8_enable;
diff --exclude=man --exclude=html --exclude=README_FILES --exclude=INSTALL
--exclude=.indent.pro -r -ur
/var/tmp/postfix-3.6-20200509-nonprod/src/util/midna_domain.c
./src/util/midna_domain.c
--- /var/tmp/postfix-3.6-20200509-nonprod/src/util/midna_domain.c
2016-12-04 12:40:19.000000000 -0500
+++ ./src/util/midna_domain.c 2020-05-10 18:59:19.000000000 -0400
@@ -20,6 +20,8 @@
/*
/* const char *midna_domain_suffix_to_utf8(
/* const char *name)
+/* AUXILIARY FUNCTIONS
+/* void midna_domain_pre_chroot(void)
/* DESCRIPTION
/* The functions in this module transform domain names from/to
/* ASCII and UTF-8 form. The result is cached to avoid repeated
@@ -52,6 +54,8 @@
/*
/* midna_domain_transitional enables transitional conversion
/* between UTF8 and ASCII labels.
+/*
+/* midna_domain_pre_chroot() does some pre-chroot initialization.
/* SEE ALSO
/* http://unicode.org/reports/tr46/ Unicode IDNA Compatibility processing
/* msg(3) diagnostics interface
@@ -144,6 +148,22 @@
}
}
+/* midna_domain_pre_chroot - pre-chroot initialization */
+
+void midna_domain_pre_chroot(void)
+{
+ UErrorCode error = U_ZERO_ERROR;
+ UIDNAInfo info = UIDNA_INFO_INITIALIZER;
+ UIDNA *idna;
+
+ idna = uidna_openUTS46(midna_domain_transitional ? UIDNA_DEFAULT
+ : UIDNA_NONTRANSITIONAL_TO_ASCII, &error);
+ if (U_FAILURE(error))
+ msg_warn("ICU library initialization failed: %s",
+ midna_domain_strerror(error, info.errors));
+ uidna_close(idna);
+}
+
/* midna_domain_to_ascii_create - convert domain to ASCII */
static void *midna_domain_to_ascii_create(const char *name, void
*unused_context)
@@ -327,6 +347,7 @@
/*
* Test program - reads names from stdin, reports invalid names to stderr.
*/
+#include <unistd.h>
#include <stdlib.h>
#include <locale.h>
@@ -350,6 +371,11 @@
/* msg_verbose = 1; */
util_utf8_enable = 1;
+ if (geteuid() == 0) {
+ midna_domain_pre_chroot();
+ if (chroot(".") != 0)
+ msg_fatal("chroot(\".\"): %m");
+ }
while (vstring_fgets_nonl(buffer, VSTREAM_IN)) {
bp = STR(buffer);
msg_info("> %s", bp);
diff --exclude=man --exclude=html --exclude=README_FILES --exclude=INSTALL
--exclude=.indent.pro -r -ur
/var/tmp/postfix-3.6-20200509-nonprod/src/util/midna_domain.h
./src/util/midna_domain.h
--- /var/tmp/postfix-3.6-20200509-nonprod/src/util/midna_domain.h
2016-11-05 18:38:56.000000000 -0400
+++ ./src/util/midna_domain.h 2020-05-11 09:46:32.000000000 -0400
@@ -18,6 +18,7 @@
extern const char *midna_domain_to_utf8(const char *);
extern const char *midna_domain_suffix_to_ascii(const char *);
extern const char *midna_domain_suffix_to_utf8(const char *);
+extern void midna_domain_pre_chroot(void);
extern int midna_domain_cache_size;
extern int midna_domain_transitional;
