logger: set function arguments read-only when possible

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

diff --git a/misc-utils/logger.c b/misc-utils/logger.c
index 884a1197b0f0d5b1088471a291a51e90712fd6e7..c10fe3c3b9c2fca547b6a1069f2837fcaf2b58eb 100644 (file)
--- a/misc-utils/logger.c
+++ b/misc-utils/logger.c
@@ -88,7 +88,7 @@ struct logger_ctl {
        char *server;
        char *port;
        int socket_type;
-       void (*syslogfp)(struct logger_ctl *ctl, char *msg);
+       void (*syslogfp)(const struct logger_ctl *ctl, const char *msg);
        unsigned int
                        prio_prefix:1,  /* read priority from intput */
                        pid:1,          /* print PID, or PPID if it is enabled as well*/
@@ -118,7 +118,7 @@ static char *get_prio_prefix(char *msg, int *prio)
        return end + 1;
 }
 
-static int decode(char *name, CODE *codetab)
+static int decode(const char *name, CODE *codetab)
 {
        register CODE *c;
 
@@ -278,7 +278,7 @@ static int journald_entry(FILE *fp)
 }
 #endif
 
-static char *xgetlogin()
+static char *xgetlogin(void)
 {
        char *cp;
        struct passwd *pw;
@@ -288,7 +288,7 @@ static char *xgetlogin()
        return cp;
 }
 
-static pid_t get_process_id(struct logger_ctl *ctl)
+static pid_t get_process_id(const struct logger_ctl *ctl)
 {
        pid_t id = 0;
 
@@ -297,7 +297,7 @@ static pid_t get_process_id(struct logger_ctl *ctl)
        return id;
 }
 
-static void syslog_rfc3164(struct logger_ctl *ctl, char *msg)
+static void syslog_rfc3164(const struct logger_ctl *ctl, const char *msg)
 {
        char *buf, pid[30], *cp, *tp, *hostname, *dot;
        time_t now;
@@ -332,7 +332,7 @@ static void syslog_rfc3164(struct logger_ctl *ctl, char *msg)
        free(buf);
 }
 
-static void syslog_rfc5424(struct logger_ctl *ctl, char *msg)
+static void syslog_rfc5424(const  struct logger_ctl *ctl, const char *msg)
 {
        char *buf, *tag = NULL, *hostname = NULL;
        char pid[32], time[64], timeq[80];
@@ -419,7 +419,7 @@ static void parse_rfc5424_flags(struct logger_ctl *ctl, char *optarg)
        }
 }
 
-static void syslog_local(struct logger_ctl *ctl, char *msg)
+static void syslog_local(const struct logger_ctl *ctl, const char *msg)
 {
        char *buf, *tag;
        char time[32], pid[32];
@@ -465,7 +465,7 @@ static void logger_open(struct logger_ctl *ctl)
        ctl->syslogfp = syslog_local;
 }
 
-static void logger_command_line(struct logger_ctl *ctl, char **argv)
+static void logger_command_line(const struct logger_ctl *ctl, char **argv)
 {
        char buf[4096];
        char *p = buf;
@@ -512,7 +512,7 @@ static void logger_stdin(struct logger_ctl *ctl)
        }
 }
 
-static void logger_close(struct logger_ctl *ctl)
+static void logger_close(const struct logger_ctl *ctl)
 {
        if (close(ctl->fd) != 0)
                err(EXIT_FAILURE, _("close failed"));