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shadow/libeconf.patch
Michael Vetter 6511638aa9 Accepting request 735615 from home:kukuk:etc 
- libeconf.patch: Add support for libeconf and /usr/etc for
  login.defs.
- Move first configuration files and pam config files to /usr/etc

OBS-URL: https://build.opensuse.org/request/show/735615
OBS-URL: https://build.opensuse.org/package/show/Base:System/shadow?expand=0&rev=79
2019-10-09 08:44:59 +00:00

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From b52ce71c276d6dafceac6b942b534af77b647f48 Mon Sep 17 00:00:00 2001
From: Thorsten Kukuk <kukuk@suse.com>
Date: Fri, 20 Sep 2019 10:27:31 +0200
Subject: [PATCH] Add support for a vendor directory and libeconf
With this, it is possible for Linux distributors to store their
supplied default configuration files somewhere below /usr, while
/etc only contains the changes made by the user. The new option
--enable-vendordir defines where the shadow suite should additional
look for login.defs if this file is not in /etc.
libeconf is a key/value configuration file reading library, which
handles the split of configuration files in different locations
and merges them transparently for the application.
---
configure.ac | 13 +++++++-
lib/Makefile.am | 4 +++
lib/getdef.c | 76 +++++++++++++++++++++++++++++++++++++++++++
libmisc/Makefile.am | 2 +-
libmisc/prefix_flag.c | 18 ++++++----
src/Makefile.am | 55 ++++++++++++++++---------------
6 files changed, 132 insertions(+), 36 deletions(-)
diff --git a/configure.ac b/configure.ac
index 1907afbd..6a273766 100644
--- a/configure.ac
+++ b/configure.ac
@@ -247,7 +247,7 @@ AC_ARG_ENABLE(subordinate-ids,
[enable_subids="maybe"]
)
-AC_ARG_WITH(audit,
+AC_ARG_WITH(audit,
[AC_HELP_STRING([--with-audit], [use auditing support @<:@default=yes if found@:>@])],
[with_audit=$withval], [with_audit=maybe])
AC_ARG_WITH(libpam,
@@ -321,6 +321,17 @@ AC_SEARCH_LIBS(inet_ntoa, inet)
AC_SEARCH_LIBS(socket, socket)
AC_SEARCH_LIBS(gethostbyname, nsl)
+AC_CHECK_LIB([econf],[econf_readDirs],[LIBECONF="-leconf"],[LIBECONF=""])
+if test -n "$LIBECONF"; then
+ ECONF_CPPFLAGS="-DUSE_ECONF=1"
+ AC_ARG_ENABLE([vendordir],
+ AS_HELP_STRING([--enable-vendordir=DIR], [Directory for distribution provided configuration files]),,[])
+fi
+AC_SUBST(ECONF_CPPFLAGS)
+AC_SUBST(LIBECONF)
+AC_SUBST([VENDORDIR], [$enable_vendordir])
+AM_CONDITIONAL([HAVE_VENDORDIR], [test "x$enable_vendordir" != x])
+
if test "$enable_shadowgrp" = "yes"; then
AC_DEFINE(SHADOWGRP, 1, [Define to support the shadow group file.])
fi
diff --git a/lib/Makefile.am b/lib/Makefile.am
index fd634542..a40c08a1 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -6,6 +6,10 @@ DEFS =
noinst_LTLIBRARIES = libshadow.la
libshadow_la_LDFLAGS = -version-info 0:0:0
+libshadow_la_CPPFLAGS = $(ECONF_CPPFLAGS)
+if HAVE_VENDORDIR
+libshadow_la_CPPFLAGS += -DVENDORDIR=\"$(VENDORDIR)\"
+endif
libshadow_la_SOURCES = \
commonio.c \
diff --git a/lib/getdef.c b/lib/getdef.c
index ece33a78..939aea29 100644
--- a/lib/getdef.c
+++ b/lib/getdef.c
@@ -40,6 +40,9 @@
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
+#ifdef USE_ECONF
+#include <libeconf.h>
+#endif
#include "getdef.h"
/*
* A configuration item definition.
@@ -152,11 +155,20 @@ static struct itemdef knowndef_table[] = {
{NULL, NULL}
};
+#ifdef USE_ECONF
+#ifdef VENDORDIR
+static const char* vendordir = VENDORDIR;
+#else
+static const char* vendordir = NULL;
+#endif
+static const char* sysconfdir = "/etc";
+#else
#ifndef LOGINDEFS
#define LOGINDEFS "/etc/login.defs"
#endif
static const char* def_fname = LOGINDEFS; /* login config defs file */
+#endif
static bool def_loaded = false; /* are defs already loaded? */
/* local function prototypes */
@@ -433,7 +445,27 @@ static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *name)
void setdef_config_file (const char* file)
{
+#ifdef USE_ECONF
+ size_t len;
+ char* cp;
+
+ len = strlen(file) + strlen(sysconfdir) + 2;
+ cp = malloc(len);
+ if (cp == NULL)
+ exit (13);
+ snprintf(cp, len, "%s/%s", file, sysconfdir);
+ sysconfdir = cp;
+#ifdef VENDORDIR
+ len = strlen(file) + strlen(vendordir) + 2;
+ cp = malloc(len);
+ if (cp == NULL)
+ exit (13);
+ snprintf(cp, len, "%s/%s", file, vendordir);
+ vendordir = cp;
+#endif
+#else
def_fname = file;
+#endif
}
/*
@@ -444,9 +476,16 @@ void setdef_config_file (const char* file)
static void def_load (void)
{
+#ifdef USE_ECONF
+ econf_file *defs_file = NULL;
+ econf_err error;
+ char **keys;
+ size_t key_number;
+#else
int i;
FILE *fp;
char buf[1024], *name, *value, *s;
+#endif
/*
* Set the initialized flag.
@@ -454,6 +493,42 @@ static void def_load (void)
*/
def_loaded = true;
+#ifdef USE_ECONF
+
+ error = econf_readDirs (&defs_file, vendordir, sysconfdir, "login", "defs", " \t", "#");
+ if (error) {
+ if (error == ECONF_NOFILE)
+ return;
+
+ SYSLOG ((LOG_CRIT, "cannot open login definitions [%s]",
+ econf_errString(error)));
+ exit (EXIT_FAILURE);
+ }
+
+ if ((error = econf_getKeys(defs_file, NULL, &key_number, &keys))) {
+ SYSLOG ((LOG_CRIT, "cannot read login definitions [%s]",
+ econf_errString(error)));
+ exit (EXIT_FAILURE);
+ }
+
+ for (size_t i = 0; i < key_number; i++) {
+ char *value;
+
+ econf_getStringValue(defs_file, NULL, keys[i], &value);
+
+ /*
+ * Store the value in def_table.
+ *
+ * Ignore failures to load the login.defs file.
+ * The error was already reported to the user and to
+ * syslog. The tools will just use their default values.
+ */
+ (void)putdef_str (keys[i], value);
+ }
+
+ econf_free (keys);
+ econf_free (defs_file);
+#else
/*
* Open the configuration definitions file.
*/
@@ -517,6 +592,7 @@ static void def_load (void)
}
(void) fclose (fp);
+#endif
}
diff --git a/libmisc/Makefile.am b/libmisc/Makefile.am
index 9aed980f..7f43161f 100644
--- a/libmisc/Makefile.am
+++ b/libmisc/Makefile.am
@@ -1,7 +1,7 @@
EXTRA_DIST = .indent.pro xgetXXbyYY.c
-AM_CPPFLAGS = -I$(top_srcdir)/lib
+AM_CPPFLAGS = -I$(top_srcdir)/lib $(ECONF_CPPFLAGS)
noinst_LIBRARIES = libmisc.a
diff --git a/libmisc/prefix_flag.c b/libmisc/prefix_flag.c
index cd1eec47..4fe6d195 100644
--- a/libmisc/prefix_flag.c
+++ b/libmisc/prefix_flag.c
@@ -96,7 +96,7 @@ extern const char* process_prefix_flag (const char* short_opt, int argc, char **
}
}
-
+
if (prefix != NULL) {
if ( prefix[0] == '\0' || !strcmp(prefix, "/"))
@@ -113,7 +113,7 @@ extern const char* process_prefix_flag (const char* short_opt, int argc, char **
group_db_file = xmalloc(len);
snprintf(group_db_file, len, "%s/%s", prefix, GROUP_FILE);
gr_setdbname(group_db_file);
-
+
#ifdef SHADOWGRP
len = strlen(prefix) + strlen(SGROUP_FILE) + 2;
sgroup_db_file = xmalloc(len);
@@ -128,7 +128,7 @@ extern const char* process_prefix_flag (const char* short_opt, int argc, char **
spw_db_file = xmalloc(len);
snprintf(spw_db_file, len, "%s/%s", prefix, SHADOW_FILE);
spw_setdbname(spw_db_file);
-
+
#ifdef ENABLE_SUBIDS
len = strlen(prefix) + strlen("/etc/subuid") + 2;
suid_db_file = xmalloc(len);
@@ -141,11 +141,15 @@ extern const char* process_prefix_flag (const char* short_opt, int argc, char **
sub_gid_setdbname(sgid_db_file);
#endif
+#ifdef USE_ECONF
+ setdef_config_file(prefix);
+#else
len = strlen(prefix) + strlen("/etc/login.defs") + 2;
def_conf_file = xmalloc(len);
snprintf(def_conf_file, len, "%s/%s", prefix, "/etc/login.defs");
setdef_config_file(def_conf_file);
- }
+#endif
+ }
if (prefix == NULL)
return "";
@@ -169,7 +173,7 @@ extern struct group *prefix_getgrnam(const char *name)
fclose(fg);
return grp;
}
-
+
return getgrnam(name);
}
@@ -262,7 +266,7 @@ extern void prefix_setpwent()
}
if (fp_pwent)
fclose (fp_pwent);
-
+
fp_pwent = fopen(passwd_db_file, "rt");
if(!fp_pwent)
return;
@@ -293,7 +297,7 @@ extern void prefix_setgrent()
}
if (fp_grent)
fclose (fp_grent);
-
+
fp_grent = fopen(group_db_file, "rt");
if(!fp_grent)
return;
diff --git a/src/Makefile.am b/src/Makefile.am
index f7f132ee..451816d7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -88,42 +88,43 @@ else
LIBCRYPT_NOPAM = $(LIBCRYPT)
endif
-chage_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
+chage_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBECONF)
newuidmap_LDADD = $(LDADD) $(LIBSELINUX) $(LIBCAP)
newgidmap_LDADD = $(LDADD) $(LIBSELINUX) $(LIBCAP)
-chfn_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
-chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBCRYPT)
-chsh_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
-chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT)
-gpasswd_LDADD = $(LDADD) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT)
-groupadd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
-groupdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
-groupmems_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX)
-groupmod_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
-grpck_LDADD = $(LDADD) $(LIBSELINUX)
-grpconv_LDADD = $(LDADD) $(LIBSELINUX)
-grpunconv_LDADD = $(LDADD) $(LIBSELINUX)
-lastlog_LDADD = $(LDADD) $(LIBAUDIT)
+chfn_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD) $(LIBECONF)
+chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBCRYPT) $(LIBECONF)
+chsh_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD) $(LIBECONF)
+chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT) $(LIBECONF)
+expiry_LDADD = $(LDADD) $(LIBECONF)
+gpasswd_LDADD = $(LDADD) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT) $(LIBECONF)
+groupadd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBECONF)
+groupdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBECONF)
+groupmems_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBECONF)
+groupmod_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBECONF)
+grpck_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
+grpconv_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
+grpunconv_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
+lastlog_LDADD = $(LDADD) $(LIBAUDIT) $(LIBECONF)
login_SOURCES = \
login.c \
login_nopam.c
-login_LDADD = $(LDADD) $(LIBPAM) $(LIBAUDIT) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
-newgrp_LDADD = $(LDADD) $(LIBAUDIT) $(LIBCRYPT)
-newusers_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT)
+login_LDADD = $(LDADD) $(LIBPAM) $(LIBAUDIT) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD) $(LIBECONF)
+newgrp_LDADD = $(LDADD) $(LIBAUDIT) $(LIBCRYPT) $(LIBECONF)
+newusers_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT) $(LIBECONF)
nologin_LDADD =
-passwd_LDADD = $(LDADD) $(LIBPAM) $(LIBCRACK) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT_NOPAM)
-pwck_LDADD = $(LDADD) $(LIBSELINUX)
-pwconv_LDADD = $(LDADD) $(LIBSELINUX)
-pwunconv_LDADD = $(LDADD) $(LIBSELINUX)
+passwd_LDADD = $(LDADD) $(LIBPAM) $(LIBCRACK) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBECONF)
+pwck_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
+pwconv_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
+pwunconv_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
su_SOURCES = \
su.c \
suauth.c
-su_LDADD = $(LDADD) $(LIBPAM) $(LIBAUDIT) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
-sulogin_LDADD = $(LDADD) $(LIBCRYPT)
-useradd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE) $(LIBACL) $(LIBATTR)
-userdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE)
-usermod_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE) $(LIBACL) $(LIBATTR)
-vipw_LDADD = $(LDADD) $(LIBSELINUX)
+su_LDADD = $(LDADD) $(LIBPAM) $(LIBAUDIT) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD) $(LIBECONF)
+sulogin_LDADD = $(LDADD) $(LIBCRYPT) $(LIBECONF)
+useradd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE) $(LIBACL) $(LIBATTR) $(LIBECONF)
+userdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE) $(LIBECONF)
+usermod_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX) $(LIBSEMANAGE) $(LIBACL) $(LIBATTR) $(LIBECONF)
+vipw_LDADD = $(LDADD) $(LIBSELINUX) $(LIBECONF)
install-am: all-am
$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
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