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Add AppArmor notice for Debian/Ubuntu users during server startup #5003

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Add AppArmor notice for Debian/Ubuntu users during server startup #5003

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31 changes: 31 additions & 0 deletions sql/mysqld.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -5107,6 +5107,37 @@ static int init_server_components()
}


/*
Print notice about AppArmor on Debian/Ubuntu systems to help users diagnose
permission issues that may be caused by AppArmor denials on systems where
the AppArmor profile is active.
*/
if (!opt_help && !opt_bootstrap)
{
FILE *fp = fopen("/sys/kernel/security/apparmor/profiles", "r");
if (fp)
{
char line[256];
bool mariadb_profile_active = false;
while (fgets(line, sizeof(line), fp))
{
if (strstr(line, "mariadbd"))
{
mariadb_profile_active = true;
break;
}
}
fclose(fp);

if (mariadb_profile_active)
{
sql_print_information(
"AppArmor profile 'mariadbd' is active. For troubleshooting tips "
"see https://mariadb.com/docs/server/server-management/starting-and-stopping-mariadb/what-to-do-if-mariadb-doesnt-start#apparmor");
}
}
}

#ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
/*
Parsing the performance schema command line option may have reported
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