glibc: re-package for libnss-db

On other distros like ubuntu/centos, libnss-db usually provides:
- The libraries
- The Makefile to create database
  (in /var/db for centos, /var/lib/misc/ for ubuntu)
- The makedb command (it's in glibc-common for centos7)

What we had is:
- The libraries are in glibc-extra-nss
- The Makefile is removed
- The makedb command is in glibc-utils (lack of dependency)

So when glibc-extra-nss is installed but glibc-utils is not,
we see error like:
nscd[165]: 165 checking for monitored file `/var/db/group.db': No such file or directory
nscd[165]: 165 checking for monitored file `/var/db/passwd.db': No such file or directory

And there is not an easy way to create these databases.

To fix the issue:
- Re-package the libraries into libnss-db
- Don't remove the Makefile and add it in libnss-db
- Add RDEPENDS for libnss-db on glibc-utils
- Provide a shell script, makedbs.sh, to generate the db files.
  This is to avoid dependency on 'make'.

Notes:
1. For external toolchain, an extra package 'libnss-db' need to be provided
   If replacing glibc from core.
2. I've check the git history of nss/db-Makefile, the last two functionality
   fix is as below.
   - fix non-portable `echo -n` usage   --  Date:   Thu Aug 6 04:14:20 2015 -0400
   - Fix db makefile rule for group.db  --  Date:   Fri Nov 11 14:43:36 2011 +0100
   So I think this file is stable enough. And using makedbs.sh which is crafted according
   to that file is not likely to cause maintanence problem.

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 177 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc/makedbs.sh b/meta/recipes-core/glibc/glibc/makedbs.sh
new file mode 100755
index 0000000000..7d51a67352
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc/makedbs.sh
@@ -0,0 +1,177 @@
+#!/bin/sh
+
+#
+# Make passwd.db, group.db, etc.
+#
+
+VAR_DB=/var/db
+
+# Use make if available
+if [ -x /usr/bin/make -o -x /bin/make ]; then
+	make -C $VAR_DB
+	exit 0
+fi
+
+# No make available, do it in hard way
+
+# passwd.db
+if [ -e /etc/passwd ]; then
+target=$VAR_DB/passwd.db
+echo -n "passwd... "
+awk 'BEGIN { FS=":"; OFS=":" } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print; \
+	   printf "=%s ", $$3; print }' /etc/passwd | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# group.db
+if [ -e /etc/group ]; then
+target=$VAR_DB/group.db
+echo -n "group... "
+awk 'BEGIN { FS=":"; OFS=":" } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print; \
+	   printf "=%s ", $$3; print; \
+	   if ($$4 != "") { \
+	     split($$4, grmems, ","); \
+	     for (memidx in grmems) { \
+	       mem=grmems[memidx]; \
+	       if (members[mem] == "") \
+		 members[mem]=$$3; \
+	       else \
+		 members[mem]=members[mem] "," $$3; \
+	     } \
+	     delete grmems; } } \
+ END { for (mem in members) \
+	 printf ":%s %s %s\n", mem, mem, members[mem]; }' /etc/group | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# ethers.db
+if [ -e /etc/ethers ]; then
+target=$VAR_DB/ethers.db
+echo -n "ethers... "
+awk '/^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print; \
+	   printf "=%s ", $$2; print }' /etc/ethers | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# protocols.db
+if [ -e /etc/protocols ]; then
+target=$VAR_DB/protocols.db
+echo -n "protocols... "
+awk '/^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print; \
+	   printf "=%s ", $$2; print; \
+	   for (i = 3; i <= NF && !($$i ~ /^#/); ++i) \
+	     { printf ".%s ", $$i; print } }' /etc/protocols | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# rpc.db
+if [ -e /etc/rpc ]; then
+target=$VAR_DB/rpc.db
+echo -n "rpc... "
+awk '/^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print; \
+	   printf "=%s ", $$2; print; \
+	   for (i = 3; i <= NF && !($$i ~ /^#/); ++i) \
+	     { printf ".%s ", $$i; print } }' /etc/rpc | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# services.db
+if [ -e /etc/services ]; then
+target=$VAR_DB/services.db
+echo -n "services... "
+awk 'BEGIN { FS="[ \t/]+" } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { sub(/[ \t]*#.*$$/, "");\
+	   printf ":%s/%s ", $$1, $$3; print; \
+	   printf ":%s/ ", $$1; print; \
+	   printf "=%s/%s ", $$2, $$3; print; \
+	   printf "=%s/ ", $$2; print; \
+	   for (i = 4; i <= NF && !($$i ~ /^#/); ++i) \
+	     { printf ":%s/%s ", $$i, $$3; print; \
+	       printf ":%s/ ", $$i; print } }' /etc/services | \
+makedb --quiet -o $target -
+echo "done."
+fi
+
+# shadow.db
+if [ -e /etc/shadow ]; then
+target=$VAR_DB/shadow.db
+echo -n "shadow... "
+awk 'BEGIN { FS=":"; OFS=":" } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print }' /etc/shadow | \
+(umask 077 && makedb --quiet -o $target -)
+echo "done."
+if chgrp shadow $target 2>/dev/null; then
+	chmod g+r $target
+else
+	chown 0 $target; chgrp 0 $target; chmod 600 $target;
+	echo
+	echo "Warning: The shadow password database $target"
+	echo "has been set to be readable only by root.  You may want"
+	echo "to make it readable by the \`shadow' group depending"
+	echo "on your configuration."
+	echo
+fi
+fi
+
+# gshadow.db
+if [ -e /etc/gshadow ]; then
+target=$VAR_DB/gshadow.db
+echo -n "gshadow... "
+awk 'BEGIN { FS=":"; OFS=":" } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { printf ".%s ", $$1; print }' /etc/gshadow | \
+(umask 077 && makedb --quiet -o $target -)
+echo "done."
+if chgrp shadow $target 2>/dev/null; then
+	chmod g+r $target
+else
+	chown 0 $target; chgrp 0 $target; chmod 600 $target
+	echo
+	echo "Warning: The shadow group database $target"
+	echo "has been set to be readable only by root.  You may want"
+	echo "to make it readable by the \`shadow' group depending"
+	echo "on your configuration."
+	echo
+fi
+fi
+
+# netgroup.db
+if [ -e /etc/netgroup ]; then
+target=$VAR_DB/netgroup.db
+echo -n "netgroup... "
+awk 'BEGIN { ini=1 } \
+ /^[ \t]*$$/ { next } \
+ /^[ \t]*#/ { next } \
+ /^[^#]/ { if (sub(/[ \t]*\\$$/, " ") == 0) end="\n"; \
+	   else end=""; \
+	   gsub(/[ \t]+/, " "); \
+	   sub(/^[ \t]*/, ""); \
+	   if (ini == 0) printf "%s%s", $$0, end; \
+	   else printf ".%s %s%s", $$1, $$0, end; \
+	   ini=end == "" ? 0 : 1; } \
+ END { if (ini==0) printf "\n" }' /etc/netgroup | \
+makedb --quiet -o $target
+echo "done."
+fi