logger: make month names, login name, and tag read-only objects

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/misc-utils/logger.c b/misc-utils/logger.c
index b9fcc855292cec18793ced41c2eba6dcdb56d2ac..653adae942db116f6e791ac51a3391263782b91b 100644 (file)
--- a/misc-utils/logger.c
+++ b/misc-utils/logger.c
@@ -115,7 +115,7 @@ struct logger_ctl {
        int pri;
        pid_t pid;                      /* zero when unwanted */
        char *hdr;                      /* the syslog header (based on protocol) */
-       char *tag;
+       char const *tag;
        char *msgid;
        char *unix_socket;              /* -u <path> or default to _PATH_DEVLOG */
        char *server;
@@ -369,9 +369,9 @@ static int journald_entry(struct logger_ctl *ctl, FILE *fp)
 }
 #endif
 
-static char *xgetlogin(void)
+static char const *xgetlogin(void)
 {
-       char *cp;
+       char const *cp;
        struct passwd *pw;
 
        if (!(cp = getlogin()) || !*cp)
@@ -385,12 +385,12 @@ static char *xgetlogin(void)
  * of a leading 0). The function uses a static buffer which is
  * overwritten on the next call (just like ctime() does).
  */
-static const char *rfc3164_current_time(void)
+static char const *rfc3164_current_time(void)
 {
        static char time[32];
        struct timeval tv;
        struct tm *tm;
-       static char *monthnames[] = {
+       static char const * const monthnames[] = {
                "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
                "Sep", "Oct", "Nov", "Dec"
        };
@@ -727,7 +727,7 @@ static void syslog_rfc5424_header(struct logger_ctl *const ctl)
 {
        char *time;
        char *hostname;
-       char *const app_name = ctl->tag;
+       char const *app_name = ctl->tag;
        char *procid;
        char *const msgid = xstrdup(ctl->msgid ? ctl->msgid : NILVALUE);
        char *structured = NULL;