pw(8): fix combination of modes -N and -w random

The command "pw usermod nobody -Nw random" (or useradd)
generates random password and prints it in encrypted form
but skips choosen random string that makes not much sense
and contradicts the manual page pw.8

Fix it by showing random password in plain text with -N and
without it equally. Add yet another example of how to generate
pw-style random password.

MFC after:	2 weeks

2 files changed, 12 insertions, 7 deletions

diff --git a/usr.sbin/pw/pw.8 b/usr.sbin/pw/pw.8
index 64c22ce49848..5997728b363e 100644
--- a/usr.sbin/pw/pw.8
+++ b/usr.sbin/pw/pw.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 21, 2022
+.Dd November 28, 2022
 .Dt PW 8
 .Os
 .Sh NAME
@@ -993,6 +993,12 @@ in addition to the other groups jsmith is already a member of.
 .Bd -literal -offset indent
 pw groupmod wheel -m jsmith
 .Ed
+.Pp
+Generate random password and show it in both plain text and
+encrypted form not modifying any database.
+.Bd -literal -offset indent
+pw usermod nobody -Nw random
+.Ed
 .Sh EXIT STATUS
 The
 .Nm
diff --git a/usr.sbin/pw/pw_user.c b/usr.sbin/pw/pw_user.c
index 7dd84d468f1f..00f290f72c97 100644
--- a/usr.sbin/pw/pw_user.c
+++ b/usr.sbin/pw/pw_user.c
@@ -80,8 +80,7 @@ static uid_t	 pw_gidpolicy(struct userconf *cnf, char *grname, char *nam,
 static char	*pw_homepolicy(struct userconf * cnf, char *homedir,
     const char *user);
 static char	*pw_shellpolicy(struct userconf * cnf);
-static char	*pw_password(struct userconf * cnf, char const * user,
-    bool dryrun);
+static char	*pw_password(struct userconf * cnf, char const * user);
 static char	*shell_path(char const * path, char *shells[], char *sh);
 static void	rmat(uid_t uid);
 
@@ -510,7 +509,7 @@ pw_pwcrypt(char *password)
 }
 
 static char *
-pw_password(struct userconf * cnf, char const * user, bool dryrun)
+pw_password(struct userconf * cnf, char const * user)
 {
 	int             i, l;
 	char            pwbuf[32];
@@ -527,7 +526,7 @@ pw_password(struct userconf * cnf, char const * user, bool dryrun)
 		/*
 		 * We give this information back to the user
 		 */
-		if (conf.fd == -1 && !dryrun) {
+		if (conf.fd == -1) {
 			if (isatty(STDOUT_FILENO))
 				printf("Password for '%s' is: ", user);
 			printf("%s\n", pwbuf);
@@ -1375,7 +1374,7 @@ pw_user_add(int argc, char **argv, char *arg1)
 	if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
 		warn("setting crypt(3) format");
 	login_close(lc);
-	pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name, dryrun);
+	pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name);
 	if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 		warnx("WARNING: new account `%s' has a uid of 0 "
 		    "(superuser access!)", pwd->pw_name);
@@ -1724,7 +1723,7 @@ pw_user_mod(int argc, char **argv, char *arg1)
 		login_close(lc);
 		cnf->default_password = passwd_val(passwd,
 		    cnf->default_password);
-		pwd->pw_passwd = pw_password(cnf, pwd->pw_name, dryrun);
+		pwd->pw_passwd = pw_password(cnf, pwd->pw_name);
 		edited = true;
 	}