crypt(3) is used in the plain password file.

In addition, ocpasswd program was added to generate password file entries.

gl/m4/gnulib-comp.m4

@@ -49,15 +49,25 @@ AC_DEFUN([gl_EARLY],
   # Code from module fcntl:
   # Code from module fcntl-h:
   # Code from module fd-hook:
+  # Code from module fseek:
+  # Code from module fseeko:
+  AC_REQUIRE([AC_FUNC_FSEEKO])
+  # Code from module fstat:
   # Code from module getdelim:
   # Code from module getdtablesize:
   # Code from module getline:
+  # Code from module getpass:
   # Code from module gettime:
   # Code from module gettimeofday:
   # Code from module include_next:
+  # Code from module largefile:
+  AC_REQUIRE([AC_SYS_LARGEFILE])
+  # Code from module lseek:
+  # Code from module malloc-posix:
   # Code from module memchr:
   # Code from module memmem:
   # Code from module memmem-simple:
+  # Code from module minmax:
   # Code from module msvc-inval:
   # Code from module msvc-nothrow:
   # Code from module multiarch:
@@ -72,7 +82,9 @@ AC_DEFUN([gl_EARLY],
   # Code from module stdint:
   # Code from module stdio:
   # Code from module stdlib:
+  # Code from module strdup-posix:
   # Code from module string:
+  # Code from module sys_stat:
   # Code from module sys_time:
   # Code from module sys_types:
   # Code from module time:
@@ -117,6 +129,23 @@ AC_DEFUN([gl_INIT],
   fi
   gl_FCNTL_MODULE_INDICATOR([fcntl])
   gl_FCNTL_H
+  gl_FUNC_FSEEK
+  if test $REPLACE_FSEEK = 1; then
+    AC_LIBOBJ([fseek])
+  fi
+  gl_STDIO_MODULE_INDICATOR([fseek])
+  gl_FUNC_FSEEKO
+  if test $HAVE_FSEEKO = 0 || test $REPLACE_FSEEKO = 1; then
+    AC_LIBOBJ([fseeko])
+    gl_PREREQ_FSEEKO
+  fi
+  gl_STDIO_MODULE_INDICATOR([fseeko])
+  gl_FUNC_FSTAT
+  if test $REPLACE_FSTAT = 1; then
+    AC_LIBOBJ([fstat])
+    gl_PREREQ_FSTAT
+  fi
+  gl_SYS_STAT_MODULE_INDICATOR([fstat])
   gl_FUNC_GETDELIM
   if test $HAVE_GETDELIM = 0 || test $REPLACE_GETDELIM = 1; then
     AC_LIBOBJ([getdelim])
@@ -135,6 +164,11 @@ AC_DEFUN([gl_INIT],
     gl_PREREQ_GETLINE
   fi
   gl_STDIO_MODULE_INDICATOR([getline])
+  gl_FUNC_GETPASS
+  if test $HAVE_GETPASS = 0; then
+    AC_LIBOBJ([getpass])
+    gl_PREREQ_GETPASS
+  fi
   gl_GETTIME
   gl_FUNC_GETTIMEOFDAY
   if test $HAVE_GETTIMEOFDAY = 0 || test $REPLACE_GETTIMEOFDAY = 1; then
@@ -142,6 +176,17 @@ AC_DEFUN([gl_INIT],
     gl_PREREQ_GETTIMEOFDAY
   fi
   gl_SYS_TIME_MODULE_INDICATOR([gettimeofday])
+  AC_REQUIRE([gl_LARGEFILE])
+  gl_FUNC_LSEEK
+  if test $REPLACE_LSEEK = 1; then
+    AC_LIBOBJ([lseek])
+  fi
+  gl_UNISTD_MODULE_INDICATOR([lseek])
+  gl_FUNC_MALLOC_POSIX
+  if test $REPLACE_MALLOC = 1; then
+    AC_LIBOBJ([malloc])
+  fi
+  gl_STDLIB_MODULE_INDICATOR([malloc-posix])
   gl_FUNC_MEMCHR
   if test $HAVE_MEMCHR = 0 || test $REPLACE_MEMCHR = 1; then
     AC_LIBOBJ([memchr])
@@ -157,6 +202,7 @@ AC_DEFUN([gl_INIT],
     AC_LIBOBJ([memmem])
   fi
   gl_STRING_MODULE_INDICATOR([memmem])
+  gl_MINMAX
   gl_MSVC_INVAL
   if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
     AC_LIBOBJ([msvc-inval])
@@ -177,7 +223,15 @@ AC_DEFUN([gl_INIT],
   gl_STDINT_H
   gl_STDIO_H
   gl_STDLIB_H
+  gl_FUNC_STRDUP_POSIX
+  if test $ac_cv_func_strdup = no || test $REPLACE_STRDUP = 1; then
+    AC_LIBOBJ([strdup])
+    gl_PREREQ_STRDUP
+  fi
+  gl_STRING_MODULE_INDICATOR([strdup])
   gl_HEADER_STRING_H
+  gl_HEADER_SYS_STAT_H
+  AC_PROG_MKDIR_P
   gl_HEADER_SYS_TIME_H
   AC_PROG_MKDIR_P
   gl_SYS_TYPES_H
@@ -338,14 +392,22 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/fcntl.in.h
   lib/fd-hook.c
   lib/fd-hook.h
+  lib/fseek.c
+  lib/fseeko.c
+  lib/fstat.c
   lib/getdelim.c
   lib/getdtablesize.c
   lib/getline.c
+  lib/getpass.c
+  lib/getpass.h
   lib/gettime.c
   lib/gettimeofday.c
+  lib/lseek.c
+  lib/malloc.c
   lib/memchr.c
   lib/memchr.valgrind
   lib/memmem.c
+  lib/minmax.h
   lib/msvc-inval.c
   lib/msvc-inval.h
   lib/msvc-nothrow.c
@@ -354,10 +416,13 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/stdbool.in.h
   lib/stddef.in.h
   lib/stdint.in.h
+  lib/stdio-impl.h
   lib/stdio.in.h
   lib/stdlib.in.h
   lib/str-two-way.h
+  lib/strdup.c
   lib/string.in.h
+  lib/sys_stat.in.h
   lib/sys_time.in.h
   lib/sys_types.in.h
   lib/time.in.h
@@ -375,17 +440,24 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/fcntl-o.m4
   m4/fcntl.m4
   m4/fcntl_h.m4
+  m4/fseek.m4
+  m4/fseeko.m4
+  m4/fstat.m4
   m4/getdelim.m4
   m4/getdtablesize.m4
   m4/getline.m4
+  m4/getpass.m4
   m4/gettime.m4
   m4/gettimeofday.m4
   m4/gnulib-common.m4
   m4/include_next.m4
+  m4/largefile.m4
   m4/longlong.m4
+  m4/lseek.m4
   m4/malloc.m4
   m4/memchr.m4
   m4/memmem.m4
+  m4/minmax.m4
   m4/mmap-anon.m4
   m4/msvc-inval.m4
   m4/msvc-nothrow.m4
@@ -398,8 +470,10 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/stdint.m4
   m4/stdio_h.m4
   m4/stdlib_h.m4
+  m4/strdup.m4
   m4/string_h.m4
   m4/sys_socket_h.m4
+  m4/sys_stat_h.m4
   m4/sys_time_h.m4
   m4/sys_types_h.m4
   m4/time_h.m4