busybox: add support for CONFIG_FEATURE_INDIVIDUAL

Previously, if CONFIG_FEATURE_INDIVIDUAL was enabled for busybox,
yocto-based systems could start correctly.

This is because if busybox is built as individual apps, '/bin/busybox'
may not be present, so setting the default ALTERNATIVE_TARGET to
'/bin/busybox' is not appropriate and could lead to errors.

This patch fixes this problem by checking the existence of '/bin/busybox'
before setting the ALTERNATIVE_TARGET to '/bin/busybox'.

After this change, if busybox is built as individual apps, we'll have
links like '/bin/ls -> /bin/ls.busybox', otherwise, we'll have links
like '/bin/ls -> /bin/busybox'.

Note there's a grep expression change in this patch. The old expression
doesn't work well, it has an unwanted underscore, so I changed it to make
it work.

[YOCTO #4570]

(From OE-Core rev: 87efa83191f0b4f4cec3a821b6dfe425c781c077)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/meta/recipes-core/busybox/busybox.inc b/meta/recipes-core/busybox/busybox.inc
index f4efeb8323..99d4e997b1 100644
--- a/meta/recipes-core/busybox/busybox.inc
+++ b/meta/recipes-core/busybox/busybox.inc
@@ -171,7 +171,7 @@ do_install () {
                         install -m 0755 "0_lib/$NAME" "${D}$FILE.${BPN}"
                 done
                 # add suid bit where needed
-                for i in `grep -E "APPLET.*_BB_SUID_((MAYBE|REQUIRE))" include/applets.h | grep -v _BB_SUID_DROP | cut -f 3 -d '(' | cut -f 1 -d ','`; do
+                for i in `grep -E "APPLET.*BB_SUID_((MAYBE|REQUIRE))" include/applets.h | grep -v _BB_SUID_DROP | cut -f 3 -d '(' | cut -f 1 -d ','`; do
                         find ${D} -name $i.${BPN} -exec chmod a+s {} \;
                 done
                 install -m 0755 0_lib/libbusybox.so.${PV} ${D}${libdir}/libbusybox.so.${PV}
@@ -242,8 +242,6 @@ ALTERNATIVE_TARGET[syslog-init] = "${sysconfdir}/init.d/syslog.${BPN}"
 ALTERNATIVE_LINK_NAME[syslog-startup-conf] = "${sysconfdir}/syslog-startup.conf"
 ALTERNATIVE_TARGET[syslog-startup-conf] = "${sysconfdir}/syslog-startup.conf.${BPN}"
 
-ALTERNATIVE_TARGET = "/bin/busybox"
-
 python do_package_prepend () {
     # We need to load the full set of busybox provides from the /etc/busybox.links
     # Use this to see the update-alternatives with the right information
@@ -252,6 +250,9 @@ python do_package_prepend () {
     pn = d.getVar('PN', True)
     f = open('%s/etc/busybox.links' % (dvar), 'r')
 
+    if os.path.exists('%s/bin/busybox' % (dvar)):
+        d.setVar('ALTERNATIVE_TARGET', "/bin/busybox")
+
     for alt_link_name in f:
         alt_link_name = alt_link_name.strip()
         alt_name = os.path.basename(alt_link_name)