Maintain pw_fields, and output same to password database.

!!!!!!!!
NB
!!!!!!!!
You MUST pwd_mkdb /etc/master.passwd before attempting to use the new
libc, or things may go wrong.  (I doubt anything actually /will/ go
wrong, but the actual behavior is undefined.  YOU HAVE BEEN WARNED.)
The database format is, however, backwards-compatible, so old executables
will still work.

lib/libc/gen/pw_scan.c

@@ -62,15 +62,20 @@ pw_scan(bp, pw)
 	int root;
 	char *p, *sh;
 
+	pw->pw_fields = 0;
 	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
 		goto fmt;
 	root = !strcmp(pw->pw_name, "root");
+	if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
+		pw->pw_fields |= _PWF_NAME;
 
 	if (!(pw->pw_passwd = strsep(&bp, ":")))	/* passwd */
 		goto fmt;
+	if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD;
 
 	if (!(p = strsep(&bp, ":")))			/* uid */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_UID;
 	id = atol(p);
 	if (root && id) {
 		warnx("root uid should be 0");
@@ -84,6 +89,7 @@ pw_scan(bp, pw)
 
 	if (!(p = strsep(&bp, ":")))			/* gid */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_GID;
 	id = atol(p);
 	if (id > USHRT_MAX) {
 		warnx("%s > max gid value (%d)", p, USHRT_MAX);
@@ -92,14 +98,24 @@ pw_scan(bp, pw)
 	pw->pw_gid = id;
 
 	pw->pw_class = strsep(&bp, ":");		/* class */
+	if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS;
+
 	if (!(p = strsep(&bp, ":")))			/* change */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_CHANGE;
 	pw->pw_change = atol(p);
+
 	if (!(p = strsep(&bp, ":")))			/* expire */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_EXPIRE;
 	pw->pw_expire = atol(p);
+
 	pw->pw_gecos = strsep(&bp, ":");		/* gecos */
+	if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS;
+
 	pw->pw_dir = strsep(&bp, ":");			/* directory */
+	if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR;
+
 	if (!(pw->pw_shell = strsep(&bp, ":")))		/* shell */
 		goto fmt;
 
@@ -113,6 +129,7 @@ pw_scan(bp, pw)
 			if (!strcmp(p, sh))
 				break;	
 		}
+	if(p[0]) pw->pw_fields |= _PWF_SHELL;
 
 	if (p = strsep(&bp, ":")) {			/* too many */
 fmt:		warnx("corrupted entry");

usr.sbin/pwd_mkdb/pw_scan.c

@@ -62,15 +62,20 @@ pw_scan(bp, pw)
 	int root;
 	char *p, *sh;
 
+	pw->pw_fields = 0;
 	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
 		goto fmt;
 	root = !strcmp(pw->pw_name, "root");
+	if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
+		pw->pw_fields |= _PWF_NAME;
 
 	if (!(pw->pw_passwd = strsep(&bp, ":")))	/* passwd */
 		goto fmt;
+	if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD;
 
 	if (!(p = strsep(&bp, ":")))			/* uid */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_UID;
 	id = atol(p);
 	if (root && id) {
 		warnx("root uid should be 0");
@@ -84,6 +89,7 @@ pw_scan(bp, pw)
 
 	if (!(p = strsep(&bp, ":")))			/* gid */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_GID;
 	id = atol(p);
 	if (id > USHRT_MAX) {
 		warnx("%s > max gid value (%d)", p, USHRT_MAX);
@@ -92,14 +98,24 @@ pw_scan(bp, pw)
 	pw->pw_gid = id;
 
 	pw->pw_class = strsep(&bp, ":");		/* class */
+	if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS;
+
 	if (!(p = strsep(&bp, ":")))			/* change */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_CHANGE;
 	pw->pw_change = atol(p);
+
 	if (!(p = strsep(&bp, ":")))			/* expire */
 		goto fmt;
+	if(p[0]) pw->pw_fields |= _PWF_EXPIRE;
 	pw->pw_expire = atol(p);
+
 	pw->pw_gecos = strsep(&bp, ":");		/* gecos */
+	if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS;
+
 	pw->pw_dir = strsep(&bp, ":");			/* directory */
+	if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR;
+
 	if (!(pw->pw_shell = strsep(&bp, ":")))		/* shell */
 		goto fmt;
 
@@ -113,6 +129,7 @@ pw_scan(bp, pw)
 			if (!strcmp(p, sh))
 				break;	
 		}
+	if(p[0]) pw->pw_fields |= _PWF_SHELL;
 
 	if (p = strsep(&bp, ":")) {			/* too many */
 fmt:		warnx("corrupted entry");

usr.sbin/pwd_mkdb/pwd_mkdb.c

@@ -92,7 +92,7 @@ main(argc, argv)
 	DBT data, key;
 	FILE *fp, *oldfp;
 	sigset_t set;
-	int ch, cnt, len, makeold, tfd;
+	int ch, cnt, len, makeold, tfd, yp_enabled = 0;
 	char *p, *t;
 	char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
 	char buf2[MAXPATHLEN];
@@ -178,6 +178,7 @@ main(argc, argv)
 	data.data = (u_char *)buf;
 	key.data = (u_char *)tbuf;
 	for (cnt = 1; scan(fp, &pwd); ++cnt) {
+		if(pwd.pw_name[0] == '+') yp_enabled = 1;
 #define	COMPACT(e)	t = e; while (*p++ = *t++);
 		/* Create insecure data. */
 		p = buf;
@@ -195,6 +196,8 @@ main(argc, argv)
 		COMPACT(pwd.pw_shell);
 		memmove(p, &pwd.pw_expire, sizeof(time_t));
 		p += sizeof(time_t);
+		memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
+		p += sizeof pwd.pw_fields;
 		data.size = p - buf;
 
 		/* Store insecure by name. */
@@ -225,6 +228,14 @@ main(argc, argv)
 			    pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
 			    pwd.pw_dir, pwd.pw_shell);
 	}
+	/* If YP enabled, set flag. */
+	if(yp_enabled) {
+		tbuf[0] = _PW_KEYYPENABLED;
+		key.size = 1;
+		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+	}
+
 	(void)(dp->close)(dp);
 	if (makeold) {
 		(void)fflush(oldfp);
@@ -258,6 +269,8 @@ main(argc, argv)
 		COMPACT(pwd.pw_shell);
 		memmove(p, &pwd.pw_expire, sizeof(time_t));
 		p += sizeof(time_t);
+		memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
+		p += sizeof pwd.pw_fields;
 		data.size = p - buf;
 
 		/* Store secure by name. */
@@ -283,6 +296,14 @@ main(argc, argv)
 			error("put");
 	}
 
+	/* If YP enabled, set flag. */
+	if(yp_enabled) {
+		tbuf[0] = _PW_KEYYPENABLED;
+		key.size = 1;
+		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+	}
+
 	(void)(edp->close)(edp);
 
 	/* Set master.passwd permissions, in case caller forgot. */