[src/netbsd-8]: src/sbin/cgdconfig Pull up following revision(s) (requested b...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/10ed1d284a12
branches:  netbsd-8
changeset: 435166:10ed1d284a12
user:      martin <martin%NetBSD.org@localhost>
date:      Tue Jul 31 16:01:12 2018 +0000

description:
Pull up following revision(s) (requested by kre in ticket #946):

        sbin/cgdconfig/cgdconfig.c: revision 1.42
        sbin/cgdconfig/cgdconfig.c: revision 1.43
        sbin/cgdconfig/cgdconfig.c: revision 1.44
        sbin/cgdconfig/cgdconfig.c: revision 1.45
        sbin/cgdconfig/cgdconfig.8: revision 1.37
        sbin/cgdconfig/cgdconfig.8: revision 1.38

Check whether the cgd device selected is available to be
configured,that is, not already in use, before requesting
passwords from the user (or elsewhere).

Fix usage for rump.   Fixes test breakage caused by previous commit.
Check arg count in configure() at entry, rather than later.

This avoids the stupid null deref I added a couple of commits
ago (on bad usage) and also simplifies the rest of the routine
which no longer needs to check the arg count nearly as much.
Thanks to Alexander Nasonov for finding the null deref bug.

Fix missing -p in usage message (noted by Christoph Badura, thanks),
and update -l usage as well.
While here fix man page synopses and a few other odds and ends.
Add commas in enumeration.

diffstat:

 sbin/cgdconfig/cgdconfig.8 |  32 ++++++++++++++++++--------
 sbin/cgdconfig/cgdconfig.c |  55 +++++++++++++++++++++++++++++----------------
 2 files changed, 57 insertions(+), 30 deletions(-)

diffs (203 lines):

diff -r 6b3d80f0d26b -r 10ed1d284a12 sbin/cgdconfig/cgdconfig.8
--- a/sbin/cgdconfig/cgdconfig.8        Tue Jul 31 15:57:11 2018 +0000
+++ b/sbin/cgdconfig/cgdconfig.8        Tue Jul 31 16:01:12 2018 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: cgdconfig.8,v 1.36 2016/09/11 01:09:34 sevan Exp $
+.\" $NetBSD: cgdconfig.8,v 1.36.6.1 2018/07/31 16:01:12 martin Exp $
 .\"
 .\" Copyright (c) 2002, The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd September 11, 2016
+.Dd May 9, 2018
 .Dt CGDCONFIG 8
 .Os
 .Sh NAME
@@ -41,11 +41,11 @@
 .Op Ar paramsfile
 .Nm
 .Fl C
-.Op Fl nv
+.Op Fl npv
 .Op Fl f Ar configfile
 .Nm
 .Fl G
-.Op Fl nv
+.Op Fl npv
 .Op Fl i Ar ivmeth
 .Op Fl k Ar kgmeth
 .Op Fl o Ar outfile
@@ -60,7 +60,8 @@
 .Op Ar keylen
 .Nm
 .Fl l
-.Op Fl cgd
+.Op Fl v Ns Op Cm v
+.Op Ar cgd
 .Nm
 .Fl s
 .Op Fl nv
@@ -96,7 +97,7 @@
 Generate a new paramsfile (to stdout) using the values from
 .Ar paramsfile
 which will generate the same key.
-This may need to prompt for multiple passphrases.
+This may need to obtain multiple passphrases.
 .It Fl g
 Generate a paramsfile (to stdout).
 .It Fl i Ar ivmeth
@@ -116,6 +117,9 @@
 .Ar paramsfile ,
 store it in
 .Ar outfile .
+If
+.Fl o
+is not given, any paramsfile content is written to standard output.
 .It Fl p
 Read all passphrases from stdin rather than
 .Pa /dev/tty .
@@ -126,7 +130,7 @@
 in question to be unconfigured rather than prompting for the passphrase
 again.
 .It Fl s
-Read the key from stdin.
+Read the key (nb: not the passphrase) from stdin.
 .It Fl U
 Unconfigure all the devices listed in the cgd configuration file.
 .It Fl u
@@ -421,7 +425,7 @@
 .Pp
 Although not required, the partition type
 .Ar cgd
-should be used in the disklabel for the cgd partition.
+should be used in the disklabel or GPT type field for the cgd partition.
 .Sh DIAGNOSTICS
 .Bl -diag
 .It "cgdconfig: could not calibrate pkcs5_pbkdf2"
@@ -431,7 +435,9 @@
 program's execution.
 .El
 .Sh SEE ALSO
-.Xr cgd 4
+.Xr cgd 4 ,
+.Xr disklabel 8 ,
+.Xr gpt 8
 .Pp
 .Dq PKCS #5 v2.0: Password-Based Cryptography Standard ,
 RSA Laboratories, March 25, 1999.
@@ -443,6 +449,12 @@
 .Sh BUGS
 Since
 .Nm
+without
+.Fl p
 uses
 .Xr getpass 3
-to read in the passphrase, it is limited to 128 characters.
+to read in the passphrase,
+it is limited to sysconf(_SC_PASS_MAX) (128) characters.
+With
+.Fl p
+the limit is 1023 characters.
diff -r 6b3d80f0d26b -r 10ed1d284a12 sbin/cgdconfig/cgdconfig.c
--- a/sbin/cgdconfig/cgdconfig.c        Tue Jul 31 15:57:11 2018 +0000
+++ b/sbin/cgdconfig/cgdconfig.c        Tue Jul 31 16:01:12 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cgdconfig.c,v 1.41 2017/01/10 20:45:19 christos Exp $ */
+/* $NetBSD: cgdconfig.c,v 1.41.6.1 2018/07/31 16:01:12 martin Exp $ */
 
 /*-
  * Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
@@ -33,7 +33,7 @@
 #ifndef lint
 __COPYRIGHT("@(#) Copyright (c) 2002, 2003\
  The NetBSD Foundation, Inc.  All rights reserved.");
-__RCSID("$NetBSD: cgdconfig.c,v 1.41 2017/01/10 20:45:19 christos Exp $");
+__RCSID("$NetBSD: cgdconfig.c,v 1.41.6.1 2018/07/31 16:01:12 martin Exp $");
 #endif
 
 #include <err.h>
@@ -136,17 +136,19 @@
 usage(void)
 {
 
-       (void)fprintf(stderr, "usage: %s [-nv] [-V vmeth] cgd dev [paramsfile]\n",
+       (void)fprintf(stderr, "usage: %s [-npv] [-V vmeth] cgd dev "
+           "[paramsfile]\n", getprogname());
+       (void)fprintf(stderr, "       %s -C [-npv] [-f configfile]\n",
            getprogname());
-       (void)fprintf(stderr, "       %s -C [-nv] [-f configfile]\n", getprogname());
-       (void)fprintf(stderr, "       %s -G [-nv] [-i ivmeth] [-k kgmeth] "
+       (void)fprintf(stderr, "       %s -G [-npv] [-i ivmeth] [-k kgmeth] "
            "[-o outfile] paramsfile\n", getprogname());
        (void)fprintf(stderr, "       %s -g [-nv] [-i ivmeth] [-k kgmeth] "
            "[-o outfile] alg [keylen]\n", getprogname());
-       (void)fprintf(stderr, "       %s -l\n", getprogname());
+       (void)fprintf(stderr, "       %s -l [-v[v]] [cgd]\n", getprogname());
        (void)fprintf(stderr, "       %s -s [-nv] [-i ivmeth] cgd dev alg "
            "[keylen]\n", getprogname());
-       (void)fprintf(stderr, "       %s -U [-nv] [-f configfile]\n", getprogname());
+       (void)fprintf(stderr, "       %s -U [-nv] [-f configfile]\n",
+           getprogname());
        (void)fprintf(stderr, "       %s -u [-nv] cgd\n", getprogname());
        exit(EXIT_FAILURE);
 }
@@ -515,12 +517,33 @@
        char             devicename[PATH_MAX];
        const char      *dev = NULL;    /* XXX: gcc */
 
-       if (argc == 2 || argc == 3) {
-               dev = getfsspecname(devicename, sizeof(devicename), argv[1]);
-               if (dev == NULL) {
-                       warnx("getfsspecname failed: %s", devicename);
+       if (argc < 2 || argc > 3) {
+               /* print usage and exit, only if called from main() */
+               if (flags == CONFIG_FLAGS_FROMMAIN) {
+                       warnx("wrong number of args");
+                       usage();
+               }
+               return -1;
+       }
+
+       if ((
+         fd = opendisk1(*argv, O_RDWR, cgdname, sizeof(cgdname), 1, prog_open)
+           ) != -1) {
+               struct cgd_user cgu;
+
+               cgu.cgu_unit = -1;
+               if (prog_ioctl(fd, CGDIOCGET, &cgu) != -1 && cgu.cgu_dev != 0) {
+                       warnx("device %s already in use", *argv);
+                       prog_close(fd);
                        return -1;
                }
+               prog_close(fd);
+       }
+
+       dev = getfsspecname(devicename, sizeof(devicename), argv[1]);
+       if (dev == NULL) {
+               warnx("getfsspecname failed: %s", devicename);
+               return -1;
        }
 
        if (argc == 2) {
@@ -529,16 +552,8 @@
                /* make string writable for basename */
                strlcpy(pfile, dev, sizeof(pfile));
                p = params_cget(basename(pfile));
-       } else if (argc == 3) {
+       } else
                p = params_cget(argv[2]);
-       } else {
-               /* print usage and exit, only if called from main() */
-               if (flags == CONFIG_FLAGS_FROMMAIN) {
-                       warnx("wrong number of args");
-                       usage();
-               }
-               return -1;
-       }
 
        if (!p)
                return -1;