lucy/slstatus
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wifi: always retry ioctl for ifindex

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ifindex() caches the result of ioctl(SIOCGIFINDEX) and never
retries it, since the interface name strcmp succeeds after the
first call. if the interface does not exist when slstatus starts
(e.g. iwd with default config destroys/recreates interfaces
depending on service state), the ioctl fails and the stale
result is returned on all subsequent calls.

based on a patch by ryhpez, with input from Taha Medhous
This commit is contained in:
drkhsh 2026-02-12 22:46:02 +01:00
parent 6fa36bad9f
commit 4f61bbbd8e
1 changed files with 4 additions and 4 deletions
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2
components/wifi.c
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@ -110,11 +110,11 @@
} }
if (strcmp(ifr.ifr_name, interface) != 0) { if (strcmp(ifr.ifr_name, interface) != 0) {
strcpy(ifr.ifr_name, interface); strcpy(ifr.ifr_name, interface);
}
if (ioctl(ifsock, SIOCGIFINDEX, &ifr) != 0) { if (ioctl(ifsock, SIOCGIFINDEX, &ifr) != 0) {
warn("ioctl 'SIOCGIFINDEX':"); warn("ioctl 'SIOCGIFINDEX':");
return -1; return -1;
} }
}
return ifr.ifr_ifindex; return ifr.ifr_ifindex;
} }