Replace %m GNUism with strerror(errno)

Even musl libc supports %m today, as well as most syslog daemons, but
that's no excuse to use this.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

plugins/rtc.c

@@ -141,7 +141,7 @@ static void rtc_restore(void *arg)
 		else if (ENOENT == errno)
 			logit(LOG_ERR, "RTC has no previously saved (valid) time.");
 		else
-			logit(LOG_ERR, "RTC error code %d: %m", errno);
+			logit(LOG_ERR, "RTC error code %d: %s", errno, strerror(errno));
 		rc = 2;
 		goto out;
 	}

src/exec.c

@@ -249,7 +249,7 @@ static void prepare_tty(char *tty, speed_t speed, char *procname, struct rlimit
 
 	fd = open(tty, O_RDWR);
 	if (fd < 0) {
-		logit(LOG_ERR, "Failed opening %s: %m", tty);
+		logit(LOG_ERR, "Failed opening %s: %s", tty, strerror(errno));
 		_exit(1);
 	}
 
@@ -259,7 +259,7 @@ static void prepare_tty(char *tty, speed_t speed, char *procname, struct rlimit
 	close(fd);
 
 	if (ioctl(STDIN_FILENO, TIOCSCTTY, 1) < 0)
-		logit(LOG_WARNING, "Failed TIOCSCTTY on %s: %m", tty);
+		logit(LOG_WARNING, "Failed TIOCSCTTY on %s: %s", tty, strerror(errno));
 
 	/*
 	 * Reset to sane defaults in case of messup from prev. session

src/inetd.c

@@ -174,7 +174,7 @@ static void socket_cb(uev_t *w, void *arg, int events)
 
 	_d("%s: Got socket event ...", svc->cmd);
 	if (UEV_ERROR == events) {
-		logit(LOG_INFO, "%s: Socket error, aborting: %m", svc->cmd);
+		logit(LOG_INFO, "%s: Socket error, aborting: %s", svc->cmd, strerror(errno));
 		return;
 	}
 

src/log.h

@@ -43,7 +43,7 @@
 #define  _d(fmt, args...) logit(LOG_DEBUG,   "%s():" fmt "\n", __func__, ##args)
 #define  _w(fmt, args...) logit(LOG_WARNING, "%s():" fmt "\n", __func__, ##args)
 #define  _e(fmt, args...) logit(LOG_ERR,     "%s():" fmt "\n", __func__, ##args)
-#define _pe(fmt, args...) logit(LOG_ERR,     "%s():" fmt ": %m\n", __func__, ##args)
+#define _pe(fmt, args...) logit(LOG_ERR,     "%s():" fmt ": %s\n", __func__, ##args, strerror(errno))
 
 void    log_init        (int dbg);
 void    log_exit        (void);