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| author | Eugene Grosbein <eugen@FreeBSD.org> | 2022-06-21 18:29:08 +0000 |
|---|---|---|
| committer | Eugene Grosbein <eugen@FreeBSD.org> | 2022-06-21 18:32:54 +0000 |
| commit | 048ce0876f5421f70a6d348479bdeacdd8472bed (patch) | |
| tree | 9b463fa294e01c58faf4a7bb522fc9c2efb43c56 /sbin/adjkerntz/adjkerntz.c | |
| parent | b4bdc8f9253d9db46f598f17cc546c2fe0f8038d (diff) | |
| download | src-048ce0876f5421f70a6d348479bdeacdd8472bed.tar.gz src-048ce0876f5421f70a6d348479bdeacdd8472bed.zip | |
adjkerntz(8): detect extra jailed invokation to keep logs clean
It may happen that "adjkerntz -a" called from jailed root crontab.
In that case it spams logs with a line:
sysctl(set: "machdep.wall_cmos_clock"): Operation not permitted
Be silent in that case.
MFC after: 1 month
Diffstat (limited to 'sbin/adjkerntz/adjkerntz.c')
| -rw-r--r-- | sbin/adjkerntz/adjkerntz.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sbin/adjkerntz/adjkerntz.c b/sbin/adjkerntz/adjkerntz.c index e6cadcf7f189..2fde545ebf32 100644 --- a/sbin/adjkerntz/adjkerntz.c +++ b/sbin/adjkerntz/adjkerntz.c @@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$"); * with Garrett Wollman and Bruce Evans fixes. * */ +#include <errno.h> #include <stdio.h> #include <signal.h> #include <stdlib.h> @@ -159,6 +160,12 @@ again: len = sizeof(kern_offset); if (sysctlbyname("machdep.adjkerntz", &kern_offset, &len, NULL, 0) == -1) { + if (errno == EPERM && !init && geteuid() == 0) + /* + * Surplus call from jailed root crontab. + * Avoid spamming logs. + */ + return 1; syslog(LOG_ERR, "sysctl(\"machdep.adjkerntz\"): %m"); return 1; } |