diff options
| -rw-r--r-- | tools/thermal/tmon/tmon.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/thermal/tmon/tmon.c b/tools/thermal/tmon/tmon.c index b30f531173e4..059e0becb386 100644 --- a/tools/thermal/tmon/tmon.c +++ b/tools/thermal/tmon/tmon.c @@ -142,6 +142,7 @@ static void start_syslog(void) static void prepare_logging(void) { int i; + struct stat logstat; if (!logging) return; @@ -152,6 +153,29 @@ static void prepare_logging(void) return; } + if (lstat(TMON_LOG_FILE, &logstat) < 0) { + syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE); + fclose(tmon_log); + tmon_log = NULL; + return; + } + + /* The log file must be a regular file owned by us */ + if (S_ISLNK(logstat.st_mode)) { + syslog(LOG_ERR, "Log file is a symlink. Will not log\n"); + fclose(tmon_log); + tmon_log = NULL; + return; + } + + if (logstat.st_uid != getuid()) { + syslog(LOG_ERR, "We don't own the log file. Not logging\n"); + fclose(tmon_log); + tmon_log = NULL; + return; + } + + fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n"); for (i = 0; i < ptdata.nr_tz_sensor; i++) { char binding_str[33]; /* size of long + 1 */ |