[OpenWrt-Devel] [PATCH 1/1] mac80211: add default value for noscan

[Sebastian Kemper]

Commit b3d8b3a introduced a new test:

[ -n "$noscan" -a "$noscan" -gt 0 ] && hostapd_noscan=1

But if length of "$noscan" is zero (noscan is not set) this doesn't stop
the shell to evaluate the rest of the test.

root at hank2:~# [ -n "$noscan" -a "$noscan" -gt 0 ]
ash: out of range
root at hank2:~#

So when radios are brought up this shows in the log:

Sat Nov 23 10:51:38 2019 daemon.info procd: - init complete -
Sat Nov 23 10:52:24 2019 daemon.notice netifd: radio1 (1243): sh: out of range
Sat Nov 23 10:52:25 2019 user.notice firewall: Reloading firewall due to ifup of wan (eth0.2)
Sat Nov 23 10:52:25 2019 daemon.notice netifd: radio0 (1242): sh: out of range
Sat Nov 23 10:52:26 2019 authpriv.info dropbear[1536]: Not backgrounding

This commit sets noscan to 0 if unset and removes the gratuitous length
check, preventing the warning.

Signed-off-by: Sebastian Kemper <sebastian_ml at gmx.net>
---
 package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index a04f1e3ca7..5c67ea0600 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -106,7 +106,9 @@ mac80211_hostapd_setup_base() {
 	json_get_vars noscan ht_coex
 	json_get_values ht_capab_list ht_capab tx_burst

-	[ -n "$noscan" -a "$noscan" -gt 0 ] && hostapd_noscan=1
+	set_default noscan 0
+
+	[ "$noscan" -gt 0 ] && hostapd_noscan=1
 	[ "$tx_burst" = 0 ] && tx_burst=

 	ieee80211n=1
--
2.23.0


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