Replace the -q option to pwd_mkdb with a test for PW_SCAN_BIG_IDS in

the environment.  This allows big ID warnings to be suppressed for
vipw and chpass as well.

Since the environment variable test is only performed for callers
of pw_scan() that do not set pw_big_ids_warning, the test can still
be overriden.  Currently, chpass and pwd_mkdb are the only users
of pw_scan() and neither of them overrides the environment variable
test.

lib/libc/gen/pw_scan.c

@@ -60,8 +60,12 @@ static const char rcsid[] =
  * Some software assumes that IDs are short.  We should emit warnings
  * for id's which can not be stored in a short, but we are more liberal
  * by default, warning for IDs greater than USHRT_MAX.
+ *
+ * If pw_big_ids_warning is anything other than -1 on entry to pw_scan()
+ * it will be set based on the existance of PW_SCAN_BIG_IDS in the
+ * environment.
  */
-int	pw_big_ids_warning = 1;
+int	pw_big_ids_warning = -1;
 
 int
 pw_scan(bp, pw)
@@ -72,6 +76,9 @@ pw_scan(bp, pw)
 	int root;
 	char *p, *sh;
 
+	if (pw_big_ids_warning == -1)
+		pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
+
 	pw->pw_fields = 0;
 	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
 		goto fmt;

usr.bin/chpass/chpass.1

@@ -230,6 +230,12 @@ When the editor terminates, the information is re-read and used to
 update the user database itself.
 Only the user, or the super-user, may edit the information associated
 with the user.
+.Pp
+See
+.Xr pwd_mkdb 8
+for an explanation of the impact of setting the
+.Ev PW_SCAN_BIG_IDS
+environment variable.
 .Sh NIS INTERACTION
 .Nm Chpass
 can also be used in conjunction with NIS, however some restrictions

usr.sbin/pwd_mkdb/pw_scan.c

@@ -60,8 +60,12 @@ static const char rcsid[] =
  * Some software assumes that IDs are short.  We should emit warnings
  * for id's which can not be stored in a short, but we are more liberal
  * by default, warning for IDs greater than USHRT_MAX.
+ *
+ * If pw_big_ids_warning is anything other than -1 on entry to pw_scan()
+ * it will be set based on the existance of PW_SCAN_BIG_IDS in the
+ * environment.
  */
-int	pw_big_ids_warning = 1;
+int	pw_big_ids_warning = -1;
 
 int
 pw_scan(bp, pw)
@@ -72,6 +76,9 @@ pw_scan(bp, pw)
 	int root;
 	char *p, *sh;
 
+	if (pw_big_ids_warning == -1)
+		pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
+
 	pw->pw_fields = 0;
 	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
 		goto fmt;

usr.sbin/pwd_mkdb/pwd_mkdb.8

@@ -43,7 +43,6 @@
 .Op Fl C
 .Op Fl N
 .Op Fl p
-.Op Fl q
 .Op Fl d Ar directory
 .Op Fl s Ar cachesize
 .Op Fl u Ar username
@@ -79,12 +78,6 @@ the rebuilding of the database.
 .It Fl p
 Create a Version 7 style password file and install it into
 .Pa /etc/passwd .
-.It Fl q
-Suppress the warnings that
-.Nm
-normally generates for large user and group IDs.
-Such IDs can cause serious problems with software
-that makes assumptions about the values of IDs.
 .It Fl d Ar directory
 Store databases into specified destination directory instead of
 .Pa /etc .
@@ -110,6 +103,15 @@ The databases are used by the C library password routines (see
 .Pp
 .Nm Pwd_mkdb
 exits zero on success, non-zero on failure.
+.Sh ENVIRONMENT
+If the
+.Ev PW_SCAN_BIG_IDS
+environment variable is set,
+.Nm
+will suppress the warning messages that are
+normally generated for large user and group IDs.
+Such IDs can cause serious problems with software
+that makes assumptions about the values of IDs.
 .Sh FILES
 .Bl -tag -width Pa -compact
 .It Pa /etc/pwd.db

usr.sbin/pwd_mkdb/pwd_mkdb.c

@@ -115,7 +115,7 @@ main(argc, argv)
 	strcpy(prefix, _PATH_PWD);
 	makeold = 0;
 	username = NULL;
-	while ((ch = getopt(argc, argv, "Cd:pqs:u:vN")) != -1)
+	while ((ch = getopt(argc, argv, "Cd:ps:u:vN")) != -1)
 		switch(ch) {
 		case 'C':                       /* verify only */
 			Cflag = 1;
@@ -126,9 +126,6 @@ main(argc, argv)
 		case 'p':			/* create V7 "file.orig" */
 			makeold = 1;
 			break;
-		case 'q':
-			pw_big_ids_warning = 0;
-			break;
 		case 's':			/* change default cachesize */
 			openinfo.cachesize = atoi(optarg) * 1024 * 1024;
 			break;

usr.sbin/vipw/vipw.8

@@ -85,12 +85,15 @@ and the new information is not available to programs.
 .Sh ENVIRONMENT
 If the following environment variable exists it will be utilized by
 .Nm Ns :
-.Bl -tag -width EDITOR
+.Bl -tag -width PW_SCAN_BIG_IDS
 .It Ev EDITOR
 The editor specified by the string
 .Ev EDITOR
 will be invoked instead of the default editor
 .Xr vi 1 .
+.It Ev PW_SCAN_BIG_IDS
+See
+.Xr pwd_mkdb 8 .
 .El
 .Sh SEE ALSO
 .Xr chpass 1 ,