s-s-d: Fix and unify fatal error strings

Do not use strerror on fatal() calls as it's already doing that
internally if errno is not 0. Remove redundant new line at end of
fatal() strings. Decapitalize first word. Clarify some strings to
make it obvious it's an error message.

utils/start-stop-daemon.c

@@ -274,7 +274,7 @@ static void
 xgettimeofday(struct timeval *tv)
 {
 	if (gettimeofday(tv, NULL) != 0)
-		fatal("gettimeofday failed: %s", strerror(errno));
+		fatal("gettimeofday failed");
 }
 
 static void
@@ -306,7 +306,7 @@ daemonize(void)
 
 	pid = fork();
 	if (pid < 0)
-		fatal("Unable to do first fork.\n");
+		fatal("unable to do first fork");
 	else if (pid) /* Parent. */
 		_exit(0);
 
@@ -319,7 +319,7 @@ daemonize(void)
 
 	pid = fork();
 	if (pid < 0)
-		fatal("Unable to do second fork.\n");
+		fatal("unable to do second fork");
 	else if (pid) /* Parent. */
 		_exit(0);
 
@@ -591,7 +591,7 @@ set_proc_schedule(struct res_schedule *sched)
 	param.sched_priority = sched->priority;
 
 	if (sched_setscheduler(getpid(), sched->policy, &param) == -1)
-		fatal("Unable to set process scheduler");
+		fatal("unable to set process scheduler");
 #endif
 }
 
@@ -611,7 +611,7 @@ set_io_schedule(struct res_schedule *sched)
 
 	io_sched_mask = IOPRIO_PRIO_VALUE(sched->policy, sched->priority);
 	if (ioprio_set(IOPRIO_WHO_PROCESS, getpid(), io_sched_mask) == -1)
-		warning("Unable to alter IO priority to mask %i (%s)\n",
+		warning("unable to alter IO priority to mask %i (%s)\n",
 		        io_sched_mask, strerror(errno));
 #endif
 }
@@ -1133,7 +1133,7 @@ pid_is_running(pid_t pid)
 	else if (errno == ESRCH)
 		return false;
 	else
-		fatal("Error checking pid %u status: %s", pid, strerror(errno));
+		fatal("error checking pid %u status", pid);
 }
 #endif
 
@@ -1177,7 +1177,7 @@ do_pidfile(const char *name)
 			check(pid);
 		fclose(f);
 	} else if (errno != ENOENT)
-		fatal("open pidfile %s: %s", name, strerror(errno));
+		fatal("unable to open pidfile %s", name);
 }
 
 #if defined(OSLinux) || defined (OSsunos)
@@ -1191,7 +1191,7 @@ do_procinit(void)
 
 	procdir = opendir("/proc");
 	if (!procdir)
-		fatal("opendir /proc: %s", strerror(errno));
+		fatal("unable to opendir /proc");
 
 	foundany = 0;
 	while ((entry = readdir(procdir)) != NULL) {
@@ -1325,7 +1325,7 @@ run_stop_schedule(void)
 	else if (userspec)
 		sprintf(what_stop, "process(es) owned by '%.200s'", userspec);
 	else
-		fatal("internal error, please report");
+		fatal("internal error, no match option, please report");
 
 	anykilled = 0;
 	retry_nr = 0;
@@ -1412,8 +1412,7 @@ run_stop_schedule(void)
 
 				r = select(0, NULL, NULL, NULL, &interval);
 				if (r < 0 && errno != EINTR)
-					fatal("select() failed for pause: %s",
-					      strerror(errno));
+					fatal("select() failed for pause");
 			}
 		default:
 			assert(!"schedule[].type value must be valid");
@@ -1468,7 +1467,7 @@ main(int argc, char **argv)
 			fullexecname = execname;
 
 		if (stat(fullexecname, &exec_stat))
-			fatal("stat %s: %s", fullexecname, strerror(errno));
+			fatal("unable to stat %s", fullexecname);
 
 		if (fullexecname != execname)
 			free(fullexecname);
@@ -1479,7 +1478,7 @@ main(int argc, char **argv)
 
 		pw = getpwnam(userspec);
 		if (!pw)
-			fatal("user '%s' not found\n", userspec);
+			fatal("user '%s' not found", userspec);
 
 		user_id = pw->pw_uid;
 	}
@@ -1487,7 +1486,7 @@ main(int argc, char **argv)
 	if (changegroup && sscanf(changegroup, "%d", &runas_gid) != 1) {
 		struct group *gr = getgrnam(changegroup);
 		if (!gr)
-			fatal("group '%s' not found\n", changegroup);
+			fatal("group '%s' not found", changegroup);
 		runas_gid = gr->gr_gid;
 	}
 	if (changeuser) {
@@ -1499,7 +1498,7 @@ main(int argc, char **argv)
 		else
 			pw = getpwnam(changeuser);
 		if (!pw)
-			fatal("user '%s' not found\n", changeuser);
+			fatal("user '%s' not found", changeuser);
 		runas_uid = pw->pw_uid;
 		if (changegroup == NULL) {
 			/* Pass the default group of this user. */
@@ -1562,8 +1561,7 @@ main(int argc, char **argv)
 	if (nicelevel) {
 		errno = 0;
 		if ((nice(nicelevel) == -1) && (errno != 0))
-			fatal("Unable to alter nice level by %i: %s",
-			      nicelevel, strerror(errno));
+			fatal("unable to alter nice level by %i", nicelevel);
 	}
 	if (proc_sched)
 		set_proc_schedule(proc_sched);
@@ -1576,8 +1574,8 @@ main(int argc, char **argv)
 		FILE *pidf = fopen(pidfile, "w");
 		pid_t pidt = getpid();
 		if (pidf == NULL)
-			fatal("Unable to open pidfile '%s' for writing: %s",
-			      pidfile, strerror(errno));
+			fatal("unable to open pidfile '%s' for writing",
+			      pidfile);
 		fprintf(pidf, "%d\n", pidt);
 		if (fflush(pidf))
 			fatal("unable to flush pidfile '%s'", pidfile);
@@ -1587,19 +1585,19 @@ main(int argc, char **argv)
 	}
 	if (changeroot != NULL) {
 		if (chdir(changeroot) < 0)
-			fatal("Unable to chdir() to %s", changeroot);
+			fatal("unable to chdir() to %s", changeroot);
 		if (chroot(changeroot) < 0)
-			fatal("Unable to chroot() to %s", changeroot);
+			fatal("unable to chroot() to %s", changeroot);
 	}
 	if (chdir(changedir) < 0)
-		fatal("Unable to chdir() to %s", changedir);
+		fatal("unable to chdir() to %s", changedir);
 
 	rgid = getgid();
 	ruid = getuid();
 	if (changegroup != NULL) {
 		if (rgid != (gid_t)runas_gid)
 			if (setgid(runas_gid))
-				fatal("Unable to set gid to %d", runas_gid);
+				fatal("unable to set gid to %d", runas_gid);
 	}
 	if (changeuser != NULL) {
 		/* We assume that if our real user and group are the same as
@@ -1607,12 +1605,12 @@ main(int argc, char **argv)
 		 * will be already in place. */
 		if (rgid != (gid_t)runas_gid || ruid != (uid_t)runas_uid)
 			if (initgroups(changeuser, runas_gid))
-				fatal("Unable to set initgroups() with gid %d",
+				fatal("unable to set initgroups() with gid %d",
 				      runas_gid);
 
 		if (ruid != (uid_t)runas_uid)
 			if (setuid(runas_uid))
-				fatal("Unable to set uid to %s", changeuser);
+				fatal("unable to set uid to %s", changeuser);
 	}
 
 	if (background) {
@@ -1634,6 +1632,6 @@ main(int argc, char **argv)
 			close(i);
 	}
 	execv(startas, argv);
-	fatal("Unable to start %s: %s", startas, strerror(errno));
+	fatal("unable to start %s", startas);
 }