diff --git a/tzpfms.pdf b/tzpfms.pdf
index d10d7bc..ec69d85 100644
Binary files a/tzpfms.pdf and b/tzpfms.pdf differ
diff --git a/tzpfms.ps b/tzpfms.ps
index 4cdbdb6..d544560 100644
--- a/tzpfms.ps
+++ b/tzpfms.ps
@@ -1,6 +1,6 @@
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-R 3.633(,w)-.65 G 1.133(ill be run via)-3.633 F F4(/bin/)3.633 E F2
-2.799(sh \255c)B F0 1.134(to pro)3.633 F 1.134
-(vide a passphrase, instead of reading)-.15 F
-(from the standard input stream.)143 306 Q .189
-(The standard output stream of the helper is tied to an anon)143 324 R
-.188(ymous \214le and used in its entirety as the)-.15 F(passphrase, e)
-143 336 Q(xcept for a trailing ne)-.15 E(w-line, if an)-.25 E 3.8 -.65
-(y. T)-.15 H(he ar).65 E(guments are:)-.18 E F4($1)155 348 Q F0 .803
-(Pre-formatted noun phrase with all the information belo)172 348 R 2.103
--.65(w, l)-.25 H(ik).65 E 3.303(e")-.1 G -.15(Pa)-3.303 G .803
-(ssphrase for tarta-zoot").15 F(or "Ne)172 360 Q 2.5(wp)-.25 G
-(assphrase for tarta-zoot \(ag)-2.5 E(ain\)")-.05 E F4($2)155 372 Q F0
-(Either the dataset name or the element of the TPM hierarch)172 372 Q(y)
--.05 E F4($3)155 384 Q F0("ne)172 384 Q(w" if this is for a ne)-.25 E
-2.5(wp)-.25 G(assphrase)-2.5 E F4($4)155 396 Q F0("ag)172 396 Q
-(ain" if it')-.05 E 2.5(st)-.55 G(he second prompt for that passphrase)
--2.5 E .181(If the helper doesn')143 414 R 2.681(te)-.18 G 1.847
-(xist \()-2.831 F .181(the shell e)1.666 F .181(xits with)-.15 F F1(127)
-2.681 E F0 -3.151 1.666(\), a d)1.666 H .181
-(iagnostic is issued and the normal prompt)-1.666 F(is used as f)143 426
-Q 2.5(all-back. If)-.1 F(it f)2.5 E(ails for an)-.1 E 2.5(yo)-.15 G
-(ther reason, the prompting is aborted.)-2.5 E F1 1.666
-(TPM2 back-end con\214guration)72 450 R(En)84 462 Q(vir)-.4 E .625
-(onment v)-.18 F(ariables)-.1 E F4(TSS2_LOG)102 474 Q F0(An)155 474 Q
-2.5(yo)-.15 G(f:)-2.5 E F1(NONE)2.5 E F0(,)A F1(ERR)2.5 E(OR)-.3 E F0(,)
-A F1 -1.2(WA)2.5 G(RNING)1.2 E F0(,)A F1(INFO)2.5 E F0(,)A F1(DEB)2.5 E
-(UG)-.1 E F0(,)A F1(TRA)2.5 E(CE)-.55 E F0 5(.D)C(ef)-5 E(ault:)-.1 E F1
--1.2(WA)2.5 G(RNING)1.2 E F0(.)A F1 .625(TPM selection)84 498 R F0 .516
-(The library)102 510 R F2(libtss2-tcti-default.so)3.016 E F0 .516
-(can be link)3.016 F .516(ed to an)-.1 F 3.017(yo)-.15 G 3.017(ft)-3.017
-G(he)-3.017 E F4(libtss2-tcti-)3.017 E/F5 10/Symbol SF(*)A F4(.so)A F0
-(libraries)3.017 E .576(to select the def)102 522 R .576
+(TZPFMS_PASSPHRASE_HELPER)102 282 Q F0 .465(By def)143 294 R .466(ault,\
+ passphrases are prompted for and read in on the standard output and in\
+put streams.)-.1 F(If)5.466 E F4(TZPFMS_PASSPHRASE_HELPER)143 306 Q F0
+.517(is set and nonempty)3.017 F 3.017(,i)-.65 G 3.017(tw)-3.017 G .516
+(ill be run via)-3.017 F F4(/bin/)3.016 E F2 2.182(sh \255c)B F0 .516
+(to pro-)3.016 F(vide each passphrase, instead.)143 318 Q .188
+(The standard output stream of the helper is tied to an anon)143 336 R
+.189(ymous \214le and used in its entirety as the)-.15 F(passphrase, e)
+143 348 Q(xcept for a trailing ne)-.15 E(w-line, if an)-.25 E 3.8 -.65
+(y. T)-.15 H(he ar).65 E(guments are:)-.18 E F4($1)155 360 Q F0
+(Pre-formatted noun phrase with all the information belo)172 360 Q 1.3
+-.65(w, f)-.25 H(or use as a prompt).65 E F4($2)155 372 Q F0
+(Either the dataset name or the element of the TPM hierarch)172 372 Q
+2.5(yb)-.05 G(eing prompted for)-2.5 E F4($3)155 384 Q F0("ne)172 384 Q
+(w" if this is for a ne)-.25 E 2.5(wp)-.25 G(assphrase, otherwise blank)
+-2.5 E F4($4)155 396 Q F0("ag)172 396 Q(ain" if it')-.05 E 2.5(st)-.55 G
+(he second prompt for that passphrase, otherwise blank)-2.5 E .181
+(If the helper doesn')143 414 R 2.681(te)-.18 G 1.847(xist \()-2.831 F
+.181(the shell e)1.666 F .181(xits with)-.15 F F1(127)2.681 E F0 -3.151
+1.666(\), a d)1.666 H .181(iagnostic is issued and the normal prompt)
+-1.666 F(is used as f)143 426 Q 2.5(all-back. If)-.1 F(it f)2.5 E
+(ails for an)-.1 E 2.5(yo)-.15 G(ther reason, the prompting is aborted.)
+-2.5 E F1 1.666(TPM2 back-end con\214guration)72 450 R(En)84 462 Q(vir)
+-.4 E .625(onment v)-.18 F(ariables)-.1 E F4(TSS2_LOG)102 474 Q F0(An)
+155 474 Q 2.5(yo)-.15 G(f:)-2.5 E F1(NONE)2.5 E F0(,)A F1(ERR)2.5 E(OR)
+-.3 E F0(,)A F1 -1.2(WA)2.5 G(RNING)1.2 E F0(,)A F1(INFO)2.5 E F0(,)A F1
+(DEB)2.5 E(UG)-.1 E F0(,)A F1(TRA)2.5 E(CE)-.55 E F0 5(.D)C(ef)-5 E
+(ault:)-.1 E F1 -1.2(WA)2.5 G(RNING)1.2 E F0(.)A F1 .625(TPM selection)
+84 498 R F0 .516(The library)102 510 R F2(libtss2-tcti-default.so)3.016
+E F0 .516(can be link)3.016 F .516(ed to an)-.1 F 3.017(yo)-.15 G 3.017
+(ft)-3.017 G(he)-3.017 E F4(libtss2-tcti-)3.017 E/F5 10/Symbol SF(*)A F4
+(.so)A F0(libraries)3.017 E .576(to select the def)102 522 R .576
 (ault, otherwise)-.1 F F4(/dev/tpmrm0)3.076 E F0 3.076(,t)C(hen)-3.076 E
 F4(/dev/tpm0)3.076 E F0 3.076(,t)C(hen)-3.076 E F4(localhost:2321)3.076
 E F0 .575(will be tried,)3.076 F(in order)102 534 Q 1.666(\(s)4.166 G
@@ -848,7 +848,7 @@ E F0 .575(will be tried,)3.076 F(in order)102 534 Q 1.666(\(s)4.166 G
 1.666(SPECIAL THANKS)72 636 R F0 1.6 -.8(To a)102 648 T
 (ll who support further de).8 E -.15(ve)-.25 G(lopment, in particular:)
 .15 E F1<83>122 660 Q F0(ThePhD)2.5 E F1<83>122 672 Q F0(Embark Studios)
-2.5 E(tzpfms 0.1-18)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 20, 2021)
+2.5 E(tzpfms 0.1-19)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 24, 2021)
 .15 E(10)184.295 E 0 Cg EP
 %%Page: 11 11
 %%BeginPageSetup
@@ -863,7 +863,7 @@ BP
 (rchi)-2.5 E -.15(ve)-.25 G 2.5(da).15 G(t)-2.5 E F1(https://lists.sr)
 2.5 E(.ht/~nabijaczleweli/tzpfms)-1 E F0(.)A F1 1.666(SEE ALSO)72 174 R
 (https://git.sr)102 186 Q(.ht/~nabijaczleweli/tzpfms)-1 E F0
-(tzpfms 0.1-18)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 20, 2021).15 E
+(tzpfms 0.1-19)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 24, 2021).15 E
 (11)184.295 E 0 Cg EP
 %%Page: 12 12
 %%BeginPageSetup
@@ -890,40 +890,40 @@ G 2.679(ft)-2.679 G .179(he k)-2.679 F .478 -.15(ey i)-.1 H 2.678(sa).15
 G .178(lready loaded.)-2.678 F(Equi)5.178 E -.25(va)-.25 G .178(lent to)
 .25 F F2 .178(zfs load-key)2.678 F F0 -.55('s)C F2<ad6e>4.894 E F0
 (option.)119 288 Q F1(ENVIR)72 312 Q 1.666(ONMENT V)-.3 F(ARIABLES)-1.35
-E F4(TZPFMS_PASSPHRASE_HELPER)102 324 Q F0 1.133(If set and nonempty)143
-336 R 3.633(,w)-.65 G 1.133(ill be run via)-3.633 F F4(/bin/)3.633 E F2
-2.799(sh \255c)B F0 1.134(to pro)3.633 F 1.134
-(vide a passphrase, instead of reading)-.15 F
-(from the standard input stream.)143 348 Q .189
-(The standard output stream of the helper is tied to an anon)143 366 R
-.188(ymous \214le and used in its entirety as the)-.15 F(passphrase, e)
-143 378 Q(xcept for a trailing ne)-.15 E(w-line, if an)-.25 E 3.8 -.65
-(y. T)-.15 H(he ar).65 E(guments are:)-.18 E F4($1)155 390 Q F0 .803
-(Pre-formatted noun phrase with all the information belo)172 390 R 2.103
--.65(w, l)-.25 H(ik).65 E 3.303(e")-.1 G -.15(Pa)-3.303 G .803
-(ssphrase for tarta-zoot").15 F(or "Ne)172 402 Q 2.5(wp)-.25 G
-(assphrase for tarta-zoot \(ag)-2.5 E(ain\)")-.05 E F4($2)155 414 Q F0
-(Either the dataset name or the element of the TPM hierarch)172 414 Q(y)
--.05 E F4($3)155 426 Q F0("ne)172 426 Q(w" if this is for a ne)-.25 E
-2.5(wp)-.25 G(assphrase)-2.5 E F4($4)155 438 Q F0("ag)172 438 Q
-(ain" if it')-.05 E 2.5(st)-.55 G(he second prompt for that passphrase)
--2.5 E .181(If the helper doesn')143 456 R 2.681(te)-.18 G 1.847
-(xist \()-2.831 F .181(the shell e)1.666 F .181(xits with)-.15 F F1(127)
-2.681 E F0 -3.151 1.666(\), a d)1.666 H .181
-(iagnostic is issued and the normal prompt)-1.666 F(is used as f)143 468
-Q 2.5(all-back. If)-.1 F(it f)2.5 E(ails for an)-.1 E 2.5(yo)-.15 G
-(ther reason, the prompting is aborted.)-2.5 E F1 1.666
-(TPM1.X back-end con\214guration)72 492 R .625(TPM selection)84 504 R F0
-(The)102 516 Q F2(tzpfms)2.767 E F0 .267(suite connects to a local)2.767
-F F4(tcsd)2.767 E F0 .267(\(8\) process)B 1.666(\(a)4.433 G(t)-1.666 E
-F4(localhost:30003)2.767 E F0 4.433(\)b)1.666 G 2.767(yd)-4.433 G(ef)
--2.767 E 2.767(ault. Use)-.1 F .268(the en-)2.767 F(vironment v)102 528
-Q(ariable)-.25 E F4(TZPFMS_TPM1X)2.5 E F0
-(to specify a remote TCS hostname.)2.5 E .392(The T)102 546 R(rouSerS)
--.35 E F4(tcsd)2.892 E F0 .392(\(8\) daemon will try)B F4(/dev/tpm0)
-2.892 E F0 2.892(,t)C(hen)-2.892 E F4(/udev/tpm0)2.892 E F0 2.891(,t)C
-(hen)-2.891 E F4(/dev/tpm)2.891 E F0 2.891(;b)C 2.891(yo)-2.891 G(ccup)
--2.891 E(ying)-.1 E(one of the earlier ones with, for e)102 558 Q
+E F4(TZPFMS_PASSPHRASE_HELPER)102 324 Q F0 .465(By def)143 336 R .466(a\
+ult, passphrases are prompted for and read in on the standard output an\
+d input streams.)-.1 F(If)5.466 E F4(TZPFMS_PASSPHRASE_HELPER)143 348 Q
+F0 .517(is set and nonempty)3.017 F 3.017(,i)-.65 G 3.017(tw)-3.017 G
+.516(ill be run via)-3.017 F F4(/bin/)3.016 E F2 2.182(sh \255c)B F0
+.516(to pro-)3.016 F(vide each passphrase, instead.)143 360 Q .188
+(The standard output stream of the helper is tied to an anon)143 378 R
+.189(ymous \214le and used in its entirety as the)-.15 F(passphrase, e)
+143 390 Q(xcept for a trailing ne)-.15 E(w-line, if an)-.25 E 3.8 -.65
+(y. T)-.15 H(he ar).65 E(guments are:)-.18 E F4($1)155 402 Q F0
+(Pre-formatted noun phrase with all the information belo)172 402 Q 1.3
+-.65(w, f)-.25 H(or use as a prompt).65 E F4($2)155 414 Q F0
+(Either the dataset name or the element of the TPM hierarch)172 414 Q
+2.5(yb)-.05 G(eing prompted for)-2.5 E F4($3)155 426 Q F0("ne)172 426 Q
+(w" if this is for a ne)-.25 E 2.5(wp)-.25 G(assphrase, otherwise blank)
+-2.5 E F4($4)155 438 Q F0("ag)172 438 Q(ain" if it')-.05 E 2.5(st)-.55 G
+(he second prompt for that passphrase, otherwise blank)-2.5 E .181
+(If the helper doesn')143 456 R 2.681(te)-.18 G 1.847(xist \()-2.831 F
+.181(the shell e)1.666 F .181(xits with)-.15 F F1(127)2.681 E F0 -3.151
+1.666(\), a d)1.666 H .181(iagnostic is issued and the normal prompt)
+-1.666 F(is used as f)143 468 Q 2.5(all-back. If)-.1 F(it f)2.5 E
+(ails for an)-.1 E 2.5(yo)-.15 G(ther reason, the prompting is aborted.)
+-2.5 E F1 1.666(TPM1.X back-end con\214guration)72 492 R .625
+(TPM selection)84 504 R F0(The)102 516 Q F2(tzpfms)2.767 E F0 .267
+(suite connects to a local)2.767 F F4(tcsd)2.767 E F0 .267
+(\(8\) process)B 1.666(\(a)4.433 G(t)-1.666 E F4(localhost:30003)2.767 E
+F0 4.433(\)b)1.666 G 2.767(yd)-4.433 G(ef)-2.767 E 2.767(ault. Use)-.1 F
+.268(the en-)2.767 F(vironment v)102 528 Q(ariable)-.25 E F4
+(TZPFMS_TPM1X)2.5 E F0(to specify a remote TCS hostname.)2.5 E .392
+(The T)102 546 R(rouSerS)-.35 E F4(tcsd)2.892 E F0 .392
+(\(8\) daemon will try)B F4(/dev/tpm0)2.892 E F0 2.892(,t)C(hen)-2.892 E
+F4(/udev/tpm0)2.892 E F0 2.891(,t)C(hen)-2.891 E F4(/dev/tpm)2.891 E F0
+2.891(;b)C 2.891(yo)-2.891 G(ccup)-2.891 E(ying)-.1 E
+(one of the earlier ones with, for e)102 558 Q
 (xample, shell redirection, a later one can be selected.)-.15 E F1 .625
 (See also)84 582 R F0(The T)102 594 Q(rouSerS project page at)-.35 E F1
 (https://sour)2.5 E(cef)-.18 E(or)-.25 E(ge.net/pr)-.1 E(ojects/tr)-.18
@@ -933,7 +933,7 @@ E(ousers)-.18 E F0(.)A 5.108(The TPM 1.2 main speci\214cation inde)102
 (speci\214cation)102 624 Q F0(.)A F1 1.666(SPECIAL THANKS)72 648 R F0
 1.6 -.8(To a)102 660 T(ll who support further de).8 E -.15(ve)-.25 G
 (lopment, in particular:).15 E F1<83>122 672 Q F0(ThePhD)2.5 E
-(tzpfms 0.1-18)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 20, 2021).15 E
+(tzpfms 0.1-19)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 24, 2021).15 E
 (12)184.295 E 0 Cg EP
 %%Page: 13 13
 %%BeginPageSetup
@@ -949,7 +949,7 @@ BP
 -.15(ve)-.25 G 2.5(da).15 G(t)-2.5 E F1(https://lists.sr)2.5 E
 (.ht/~nabijaczleweli/tzpfms)-1 E F0(.)A F1 1.666(SEE ALSO)72 186 R
 (https://git.sr)102 198 Q(.ht/~nabijaczleweli/tzpfms)-1 E F0
-(tzpfms 0.1-18)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 20, 2021).15 E
+(tzpfms 0.1-19)72 750 Q(No)138.745 E -.15(ve)-.15 G(mber 24, 2021).15 E
 (13)184.295 E 0 Cg EP
 %%Trailer
 end
diff --git a/zfs-tpm-list.8 b/zfs-tpm-list.8
index 1b99a55..4264437 100644
--- a/zfs-tpm-list.8
+++ b/zfs-tpm-list.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM-LIST 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm-list
diff --git a/zfs-tpm-list.8.html b/zfs-tpm-list.8.html
index 23dc60f..7a1a41d 100644
--- a/zfs-tpm-list.8.html
+++ b/zfs-tpm-list.8.html
@@ -169,8 +169,8 @@ owo/enc TPM1.X available yes</div>
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm1x-change-key.8 b/zfs-tpm1x-change-key.8
index ded763d..43b5b5f 100644
--- a/zfs-tpm1x-change-key.8
+++ b/zfs-tpm1x-change-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM1X-CHANGE-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm1x-change-key
@@ -107,26 +107,28 @@ In case of a catastrophic event, the key can be loaded by running
 .Sh ENVIRONMENT VARIABLES
 .Bl -tag -compact -width "TZPFMS"
 .It Ev TZPFMS_PASSPHRASE_HELPER
-If set and nonempty, will be run via
+By default, passphrases are prompted for and read in on the standard output and input streams.
+If
+.Ev TZPFMS_PASSPHRASE_HELPER
+is set and nonempty, it will be run via
 .Pa /bin/ Ns Nm sh Fl c
-to provide a passphrase, instead of reading from the standard input stream.
+to provide each passphrase, instead.
 .Pp
 The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
 The arguments are:
 .Bl -tag -compact -offset "@@" -width "@@"
 .It Li $1
-Pre-formatted noun phrase with all the information below, like
-.Qq Passphrase for tarta-zoot
-or
-.Qq New passphrase for tarta-zoot (again)
+Pre-formatted noun phrase with all the information below, for use as a prompt
+.\" Passphrase for tarta-zoot
+.\" New passphrase for tarta-zoot (again)
 .It Li $2
-Either the dataset name or the element of the TPM hierarchy
+Either the dataset name or the element of the TPM hierarchy being prompted for
 .It Li $3
 .Qq new
-if this is for a new passphrase
+if this is for a new passphrase, otherwise blank
 .It Li $4
 .Qq again
-if it's the second prompt for that passphrase
+if it's the second prompt for that passphrase, otherwise blank
 .El
 .Pp
 If the helper doesn't exist
diff --git a/zfs-tpm1x-change-key.8.html b/zfs-tpm1x-change-key.8.html
index 74fffc1..85fd1ed 100644
--- a/zfs-tpm1x-change-key.8.html
+++ b/zfs-tpm1x-change-key.8.html
@@ -118,25 +118,27 @@
   VARIABLES</a></h1>
 <dl class="Bl-tag Bl-compact">
   <dt id="TZPFMS_PASSPHRASE_HELPER"><a class="permalink" href="#TZPFMS_PASSPHRASE_HELPER"><code class="Ev">TZPFMS_PASSPHRASE_HELPER</code></a></dt>
-  <dd>If set and nonempty, will be run via
-      <span class="Pa">/bin/</span><code class="Nm">sh</code>
-      <code class="Fl">-c</code> to provide a passphrase, instead of reading
-      from the standard input stream.
+  <dd>By default, passphrases are prompted for and read in on the standard
+      output and input streams. If
+      <code class="Ev">TZPFMS_PASSPHRASE_HELPER</code> is set and nonempty, it
+      will be run via <span class="Pa">/bin/</span><code class="Nm">sh</code>
+      <code class="Fl">-c</code> to provide each passphrase, instead.
     <p class="Pp">The standard output stream of the helper is tied to an
         anonymous file and used in its entirety as the passphrase, except for a
         trailing new-line, if any. The arguments are:</p>
     <div class="Bd-indent">
     <dl class="Bl-tag Bl-compact">
       <dt id="$1"><a class="permalink" href="#$1"><code class="Li">$1</code></a></dt>
-      <dd>Pre-formatted noun phrase with all the information below, like
-          &quot;Passphrase for tarta-zoot&quot; or &quot;New passphrase for
-          tarta-zoot (again)&quot;</dd>
+      <dd>Pre-formatted noun phrase with all the information below, for use as a
+          prompt</dd>
       <dt id="$2"><a class="permalink" href="#$2"><code class="Li">$2</code></a></dt>
-      <dd>Either the dataset name or the element of the TPM hierarchy</dd>
+      <dd>Either the dataset name or the element of the TPM hierarchy being
+          prompted for</dd>
       <dt id="$3"><a class="permalink" href="#$3"><code class="Li">$3</code></a></dt>
-      <dd>&quot;new&quot; if this is for a new passphrase</dd>
+      <dd>&quot;new&quot; if this is for a new passphrase, otherwise blank</dd>
       <dt id="$4"><a class="permalink" href="#$4"><code class="Li">$4</code></a></dt>
-      <dd>&quot;again&quot; if it's the second prompt for that passphrase</dd>
+      <dd>&quot;again&quot; if it's the second prompt for that passphrase,
+          otherwise blank</dd>
     </dl>
     </div>
     <p class="Pp" id="127">If the helper doesn't exist (the shell exits with
@@ -199,8 +201,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm1x-clear-key.8 b/zfs-tpm1x-clear-key.8
index 73f8494..a4b5bc7 100644
--- a/zfs-tpm1x-clear-key.8
+++ b/zfs-tpm1x-clear-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM1X-CLEAR-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm1x-clear-key
diff --git a/zfs-tpm1x-clear-key.8.html b/zfs-tpm1x-clear-key.8.html
index 059c691..537bc93 100644
--- a/zfs-tpm1x-clear-key.8.html
+++ b/zfs-tpm1x-clear-key.8.html
@@ -106,8 +106,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm1x-load-key.8 b/zfs-tpm1x-load-key.8
index e502223..2a22e8f 100644
--- a/zfs-tpm1x-load-key.8
+++ b/zfs-tpm1x-load-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM1X-LOAD-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm1x-load-key
@@ -45,26 +45,28 @@ option.
 .Sh ENVIRONMENT VARIABLES
 .Bl -tag -compact -width "TZPFMS"
 .It Ev TZPFMS_PASSPHRASE_HELPER
-If set and nonempty, will be run via
+By default, passphrases are prompted for and read in on the standard output and input streams.
+If
+.Ev TZPFMS_PASSPHRASE_HELPER
+is set and nonempty, it will be run via
 .Pa /bin/ Ns Nm sh Fl c
-to provide a passphrase, instead of reading from the standard input stream.
+to provide each passphrase, instead.
 .Pp
 The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
 The arguments are:
 .Bl -tag -compact -offset "@@" -width "@@"
 .It Li $1
-Pre-formatted noun phrase with all the information below, like
-.Qq Passphrase for tarta-zoot
-or
-.Qq New passphrase for tarta-zoot (again)
+Pre-formatted noun phrase with all the information below, for use as a prompt
+.\" Passphrase for tarta-zoot
+.\" New passphrase for tarta-zoot (again)
 .It Li $2
-Either the dataset name or the element of the TPM hierarchy
+Either the dataset name or the element of the TPM hierarchy being prompted for
 .It Li $3
 .Qq new
-if this is for a new passphrase
+if this is for a new passphrase, otherwise blank
 .It Li $4
 .Qq again
-if it's the second prompt for that passphrase
+if it's the second prompt for that passphrase, otherwise blank
 .El
 .Pp
 If the helper doesn't exist
diff --git a/zfs-tpm1x-load-key.8.html b/zfs-tpm1x-load-key.8.html
index c47f6b2..37a51b1 100644
--- a/zfs-tpm1x-load-key.8.html
+++ b/zfs-tpm1x-load-key.8.html
@@ -59,25 +59,27 @@
   VARIABLES</a></h1>
 <dl class="Bl-tag Bl-compact">
   <dt id="TZPFMS_PASSPHRASE_HELPER"><a class="permalink" href="#TZPFMS_PASSPHRASE_HELPER"><code class="Ev">TZPFMS_PASSPHRASE_HELPER</code></a></dt>
-  <dd>If set and nonempty, will be run via
-      <span class="Pa">/bin/</span><code class="Nm">sh</code>
-      <code class="Fl">-c</code> to provide a passphrase, instead of reading
-      from the standard input stream.
+  <dd>By default, passphrases are prompted for and read in on the standard
+      output and input streams. If
+      <code class="Ev">TZPFMS_PASSPHRASE_HELPER</code> is set and nonempty, it
+      will be run via <span class="Pa">/bin/</span><code class="Nm">sh</code>
+      <code class="Fl">-c</code> to provide each passphrase, instead.
     <p class="Pp">The standard output stream of the helper is tied to an
         anonymous file and used in its entirety as the passphrase, except for a
         trailing new-line, if any. The arguments are:</p>
     <div class="Bd-indent">
     <dl class="Bl-tag Bl-compact">
       <dt id="$1"><a class="permalink" href="#$1"><code class="Li">$1</code></a></dt>
-      <dd>Pre-formatted noun phrase with all the information below, like
-          &quot;Passphrase for tarta-zoot&quot; or &quot;New passphrase for
-          tarta-zoot (again)&quot;</dd>
+      <dd>Pre-formatted noun phrase with all the information below, for use as a
+          prompt</dd>
       <dt id="$2"><a class="permalink" href="#$2"><code class="Li">$2</code></a></dt>
-      <dd>Either the dataset name or the element of the TPM hierarchy</dd>
+      <dd>Either the dataset name or the element of the TPM hierarchy being
+          prompted for</dd>
       <dt id="$3"><a class="permalink" href="#$3"><code class="Li">$3</code></a></dt>
-      <dd>&quot;new&quot; if this is for a new passphrase</dd>
+      <dd>&quot;new&quot; if this is for a new passphrase, otherwise blank</dd>
       <dt id="$4"><a class="permalink" href="#$4"><code class="Li">$4</code></a></dt>
-      <dd>&quot;again&quot; if it's the second prompt for that passphrase</dd>
+      <dd>&quot;again&quot; if it's the second prompt for that passphrase,
+          otherwise blank</dd>
     </dl>
     </div>
     <p class="Pp" id="127">If the helper doesn't exist (the shell exits with
@@ -140,8 +142,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm2-change-key.8 b/zfs-tpm2-change-key.8
index dcee6b3..859d25c 100644
--- a/zfs-tpm2-change-key.8
+++ b/zfs-tpm2-change-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM2-CHANGE-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm2-change-key
@@ -104,26 +104,28 @@ In case of a catastrophic event, the key can be loaded by running
 .Sh ENVIRONMENT VARIABLES
 .Bl -tag -compact -width "TZPFMS"
 .It Ev TZPFMS_PASSPHRASE_HELPER
-If set and nonempty, will be run via
+By default, passphrases are prompted for and read in on the standard output and input streams.
+If
+.Ev TZPFMS_PASSPHRASE_HELPER
+is set and nonempty, it will be run via
 .Pa /bin/ Ns Nm sh Fl c
-to provide a passphrase, instead of reading from the standard input stream.
+to provide each passphrase, instead.
 .Pp
 The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
 The arguments are:
 .Bl -tag -compact -offset "@@" -width "@@"
 .It Li $1
-Pre-formatted noun phrase with all the information below, like
-.Qq Passphrase for tarta-zoot
-or
-.Qq New passphrase for tarta-zoot (again)
+Pre-formatted noun phrase with all the information below, for use as a prompt
+.\" Passphrase for tarta-zoot
+.\" New passphrase for tarta-zoot (again)
 .It Li $2
-Either the dataset name or the element of the TPM hierarchy
+Either the dataset name or the element of the TPM hierarchy being prompted for
 .It Li $3
 .Qq new
-if this is for a new passphrase
+if this is for a new passphrase, otherwise blank
 .It Li $4
 .Qq again
-if it's the second prompt for that passphrase
+if it's the second prompt for that passphrase, otherwise blank
 .El
 .Pp
 If the helper doesn't exist
diff --git a/zfs-tpm2-change-key.8.html b/zfs-tpm2-change-key.8.html
index 07dc9fd..1b988ed 100644
--- a/zfs-tpm2-change-key.8.html
+++ b/zfs-tpm2-change-key.8.html
@@ -117,25 +117,27 @@
   VARIABLES</a></h1>
 <dl class="Bl-tag Bl-compact">
   <dt id="TZPFMS_PASSPHRASE_HELPER"><a class="permalink" href="#TZPFMS_PASSPHRASE_HELPER"><code class="Ev">TZPFMS_PASSPHRASE_HELPER</code></a></dt>
-  <dd>If set and nonempty, will be run via
-      <span class="Pa">/bin/</span><code class="Nm">sh</code>
-      <code class="Fl">-c</code> to provide a passphrase, instead of reading
-      from the standard input stream.
+  <dd>By default, passphrases are prompted for and read in on the standard
+      output and input streams. If
+      <code class="Ev">TZPFMS_PASSPHRASE_HELPER</code> is set and nonempty, it
+      will be run via <span class="Pa">/bin/</span><code class="Nm">sh</code>
+      <code class="Fl">-c</code> to provide each passphrase, instead.
     <p class="Pp">The standard output stream of the helper is tied to an
         anonymous file and used in its entirety as the passphrase, except for a
         trailing new-line, if any. The arguments are:</p>
     <div class="Bd-indent">
     <dl class="Bl-tag Bl-compact">
       <dt id="$1"><a class="permalink" href="#$1"><code class="Li">$1</code></a></dt>
-      <dd>Pre-formatted noun phrase with all the information below, like
-          &quot;Passphrase for tarta-zoot&quot; or &quot;New passphrase for
-          tarta-zoot (again)&quot;</dd>
+      <dd>Pre-formatted noun phrase with all the information below, for use as a
+          prompt</dd>
       <dt id="$2"><a class="permalink" href="#$2"><code class="Li">$2</code></a></dt>
-      <dd>Either the dataset name or the element of the TPM hierarchy</dd>
+      <dd>Either the dataset name or the element of the TPM hierarchy being
+          prompted for</dd>
       <dt id="$3"><a class="permalink" href="#$3"><code class="Li">$3</code></a></dt>
-      <dd>&quot;new&quot; if this is for a new passphrase</dd>
+      <dd>&quot;new&quot; if this is for a new passphrase, otherwise blank</dd>
       <dt id="$4"><a class="permalink" href="#$4"><code class="Li">$4</code></a></dt>
-      <dd>&quot;again&quot; if it's the second prompt for that passphrase</dd>
+      <dd>&quot;again&quot; if it's the second prompt for that passphrase,
+          otherwise blank</dd>
     </dl>
     </div>
     <p class="Pp" id="127">If the helper doesn't exist (the shell exits with
@@ -212,8 +214,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm2-clear-key.8 b/zfs-tpm2-clear-key.8
index 047bc46..9497fff 100644
--- a/zfs-tpm2-clear-key.8
+++ b/zfs-tpm2-clear-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM2-CLEAR-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm2-clear-key
@@ -42,26 +42,28 @@ for a detailed description.
 .Sh ENVIRONMENT VARIABLES
 .Bl -tag -compact -width "TZPFMS"
 .It Ev TZPFMS_PASSPHRASE_HELPER
-If set and nonempty, will be run via
+By default, passphrases are prompted for and read in on the standard output and input streams.
+If
+.Ev TZPFMS_PASSPHRASE_HELPER
+is set and nonempty, it will be run via
 .Pa /bin/ Ns Nm sh Fl c
-to provide a passphrase, instead of reading from the standard input stream.
+to provide each passphrase, instead.
 .Pp
 The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
 The arguments are:
 .Bl -tag -compact -offset "@@" -width "@@"
 .It Li $1
-Pre-formatted noun phrase with all the information below, like
-.Qq Passphrase for tarta-zoot
-or
-.Qq New passphrase for tarta-zoot (again)
+Pre-formatted noun phrase with all the information below, for use as a prompt
+.\" Passphrase for tarta-zoot
+.\" New passphrase for tarta-zoot (again)
 .It Li $2
-Either the dataset name or the element of the TPM hierarchy
+Either the dataset name or the element of the TPM hierarchy being prompted for
 .It Li $3
 .Qq new
-if this is for a new passphrase
+if this is for a new passphrase, otherwise blank
 .It Li $4
 .Qq again
-if it's the second prompt for that passphrase
+if it's the second prompt for that passphrase, otherwise blank
 .El
 .Pp
 If the helper doesn't exist
diff --git a/zfs-tpm2-clear-key.8.html b/zfs-tpm2-clear-key.8.html
index ad945dd..49fac86 100644
--- a/zfs-tpm2-clear-key.8.html
+++ b/zfs-tpm2-clear-key.8.html
@@ -60,25 +60,27 @@
   VARIABLES</a></h1>
 <dl class="Bl-tag Bl-compact">
   <dt id="TZPFMS_PASSPHRASE_HELPER"><a class="permalink" href="#TZPFMS_PASSPHRASE_HELPER"><code class="Ev">TZPFMS_PASSPHRASE_HELPER</code></a></dt>
-  <dd>If set and nonempty, will be run via
-      <span class="Pa">/bin/</span><code class="Nm">sh</code>
-      <code class="Fl">-c</code> to provide a passphrase, instead of reading
-      from the standard input stream.
+  <dd>By default, passphrases are prompted for and read in on the standard
+      output and input streams. If
+      <code class="Ev">TZPFMS_PASSPHRASE_HELPER</code> is set and nonempty, it
+      will be run via <span class="Pa">/bin/</span><code class="Nm">sh</code>
+      <code class="Fl">-c</code> to provide each passphrase, instead.
     <p class="Pp">The standard output stream of the helper is tied to an
         anonymous file and used in its entirety as the passphrase, except for a
         trailing new-line, if any. The arguments are:</p>
     <div class="Bd-indent">
     <dl class="Bl-tag Bl-compact">
       <dt id="$1"><a class="permalink" href="#$1"><code class="Li">$1</code></a></dt>
-      <dd>Pre-formatted noun phrase with all the information below, like
-          &quot;Passphrase for tarta-zoot&quot; or &quot;New passphrase for
-          tarta-zoot (again)&quot;</dd>
+      <dd>Pre-formatted noun phrase with all the information below, for use as a
+          prompt</dd>
       <dt id="$2"><a class="permalink" href="#$2"><code class="Li">$2</code></a></dt>
-      <dd>Either the dataset name or the element of the TPM hierarchy</dd>
+      <dd>Either the dataset name or the element of the TPM hierarchy being
+          prompted for</dd>
       <dt id="$3"><a class="permalink" href="#$3"><code class="Li">$3</code></a></dt>
-      <dd>&quot;new&quot; if this is for a new passphrase</dd>
+      <dd>&quot;new&quot; if this is for a new passphrase, otherwise blank</dd>
       <dt id="$4"><a class="permalink" href="#$4"><code class="Li">$4</code></a></dt>
-      <dd>&quot;again&quot; if it's the second prompt for that passphrase</dd>
+      <dd>&quot;again&quot; if it's the second prompt for that passphrase,
+          otherwise blank</dd>
     </dl>
     </div>
     <p class="Pp" id="127">If the helper doesn't exist (the shell exits with
@@ -154,8 +156,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>
diff --git a/zfs-tpm2-load-key.8 b/zfs-tpm2-load-key.8
index 72e6950..547e577 100644
--- a/zfs-tpm2-load-key.8
+++ b/zfs-tpm2-load-key.8
@@ -1,9 +1,9 @@
 .\" SPDX-License-Identifier: MIT
 .
-.Dd November 20, 2021
+.Dd November 24, 2021
 .ds doc-volume-operating-system
 .Dt ZFS-TPM2-LOAD-KEY 8
-.Os tzpfms 0.1-18
+.Os tzpfms 0.1-19
 .
 .Sh NAME
 .Nm zfs-tpm2-load-key
@@ -44,26 +44,28 @@ option.
 .Sh ENVIRONMENT VARIABLES
 .Bl -tag -compact -width "TZPFMS"
 .It Ev TZPFMS_PASSPHRASE_HELPER
-If set and nonempty, will be run via
+By default, passphrases are prompted for and read in on the standard output and input streams.
+If
+.Ev TZPFMS_PASSPHRASE_HELPER
+is set and nonempty, it will be run via
 .Pa /bin/ Ns Nm sh Fl c
-to provide a passphrase, instead of reading from the standard input stream.
+to provide each passphrase, instead.
 .Pp
 The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any.
 The arguments are:
 .Bl -tag -compact -offset "@@" -width "@@"
 .It Li $1
-Pre-formatted noun phrase with all the information below, like
-.Qq Passphrase for tarta-zoot
-or
-.Qq New passphrase for tarta-zoot (again)
+Pre-formatted noun phrase with all the information below, for use as a prompt
+.\" Passphrase for tarta-zoot
+.\" New passphrase for tarta-zoot (again)
 .It Li $2
-Either the dataset name or the element of the TPM hierarchy
+Either the dataset name or the element of the TPM hierarchy being prompted for
 .It Li $3
 .Qq new
-if this is for a new passphrase
+if this is for a new passphrase, otherwise blank
 .It Li $4
 .Qq again
-if it's the second prompt for that passphrase
+if it's the second prompt for that passphrase, otherwise blank
 .El
 .Pp
 If the helper doesn't exist
diff --git a/zfs-tpm2-load-key.8.html b/zfs-tpm2-load-key.8.html
index cba8955..747ab74 100644
--- a/zfs-tpm2-load-key.8.html
+++ b/zfs-tpm2-load-key.8.html
@@ -58,25 +58,27 @@
   VARIABLES</a></h1>
 <dl class="Bl-tag Bl-compact">
   <dt id="TZPFMS_PASSPHRASE_HELPER"><a class="permalink" href="#TZPFMS_PASSPHRASE_HELPER"><code class="Ev">TZPFMS_PASSPHRASE_HELPER</code></a></dt>
-  <dd>If set and nonempty, will be run via
-      <span class="Pa">/bin/</span><code class="Nm">sh</code>
-      <code class="Fl">-c</code> to provide a passphrase, instead of reading
-      from the standard input stream.
+  <dd>By default, passphrases are prompted for and read in on the standard
+      output and input streams. If
+      <code class="Ev">TZPFMS_PASSPHRASE_HELPER</code> is set and nonempty, it
+      will be run via <span class="Pa">/bin/</span><code class="Nm">sh</code>
+      <code class="Fl">-c</code> to provide each passphrase, instead.
     <p class="Pp">The standard output stream of the helper is tied to an
         anonymous file and used in its entirety as the passphrase, except for a
         trailing new-line, if any. The arguments are:</p>
     <div class="Bd-indent">
     <dl class="Bl-tag Bl-compact">
       <dt id="$1"><a class="permalink" href="#$1"><code class="Li">$1</code></a></dt>
-      <dd>Pre-formatted noun phrase with all the information below, like
-          &quot;Passphrase for tarta-zoot&quot; or &quot;New passphrase for
-          tarta-zoot (again)&quot;</dd>
+      <dd>Pre-formatted noun phrase with all the information below, for use as a
+          prompt</dd>
       <dt id="$2"><a class="permalink" href="#$2"><code class="Li">$2</code></a></dt>
-      <dd>Either the dataset name or the element of the TPM hierarchy</dd>
+      <dd>Either the dataset name or the element of the TPM hierarchy being
+          prompted for</dd>
       <dt id="$3"><a class="permalink" href="#$3"><code class="Li">$3</code></a></dt>
-      <dd>&quot;new&quot; if this is for a new passphrase</dd>
+      <dd>&quot;new&quot; if this is for a new passphrase, otherwise blank</dd>
       <dt id="$4"><a class="permalink" href="#$4"><code class="Li">$4</code></a></dt>
-      <dd>&quot;again&quot; if it's the second prompt for that passphrase</dd>
+      <dd>&quot;again&quot; if it's the second prompt for that passphrase,
+          otherwise blank</dd>
     </dl>
     </div>
     <p class="Pp" id="127">If the helper doesn't exist (the shell exits with
@@ -139,8 +141,8 @@
 </div>
 <table class="foot">
   <tr>
-    <td class="foot-date">November 20, 2021</td>
-    <td class="foot-os">tzpfms 0.1-18</td>
+    <td class="foot-date">November 24, 2021</td>
+    <td class="foot-os">tzpfms 0.1-19</td>
   </tr>
 </table>
 </body>