Merge branch 'su-v1' of https://github.com/lnussel/util-linux

Merge branch 'su-v1' of https://github.com/lnussel/util-linux

* 'su-v1' of https://github.com/lnussel/util-linux: (105 commits)
  use existing logindefs.c and pathnames.h
  syslog always
  remove non pam code
  make su build as part of util-linux
  call setsid() when called with -c
  make sure /sbin resp /usr/sbin are in PATH
  honor settings in /etc/default/su resp /etc/login.defs
  set sane default path
  log all su attempts
  pam support for su
  Help translators include translation team's web or email address. * src/system.h (emit_bug_reporting_address): New function. * src/base64.c: Use it rather than a literal printf. * src/basename.c, src/cat.c, src/chgrp.c, src/chmod.c: * src/chown.c, src/chroot.c, src/cksum.c, src/comm.c, src/cp.c: * src/csplit.c, src/cut.c, src/date.c, src/dd.c, src/df.c: * src/dircolors.c, src/dirname.c, src/du.c, src/echo.c, src/env.c: * src/expand.c, src/expr.c, src/factor.c, src/fmt.c, src/fold.c: * src/head.c, src/hostid.c, src/hostname.c, src/id.c, src/install.c: * src/join.c, src/kill.c, src/link.c, src/ln.c, src/logname.c: * src/ls.c, src/md5sum.c, src/mkdir.c, src/mkfifo.c, src/mknod.c: * src/mv.c, src/nice.c, src/nl.c, src/nohup.c, src/od.c: * src/paste.c, src/pathchk.c, src/pinky.c, src/pr.c, src/printenv.c: * src/printf.c, src/ptx.c, src/pwd.c, src/readlink.c, src/rm.c: * src/rmdir.c, src/seq.c, src/setuidgid.c, src/shred.c, src/shuf.c: * src/sleep.c, src/sort.c, src/split.c, src/stat.c, src/stty.c: * src/su.c, src/sum.c, src/sync.c, src/system.h, src/tac.c: * src/tail.c, src/tee.c, src/test.c, src/touch.c, src/tr.c: * src/true.c, src/tsort.c, src/tty.c, src/uname.c, src/unexpand.c: * src/uniq.c, src/unlink.c, src/uptime.c, src/users.c, src/wc.c: * src/who.c, src/whoami.c, src/yes.c: Likewise.
  Don't include dirname.h, since system.h does it now.
  Add a bootstrap procedure, so that the CVS version contains fewer files and we bootstrap the rest from gnulib, gettext, etc. * README-cvs: New file. * bootstrap: New file. * bootstrap.conf: New file. * .x-sc_trailing_blank: Remove config-log, .gdb-history.  Add .po. * configure.ac (AC_PREREQ): Move here from m4/*.m4, for benefit of gnulib-tool. (gl_DEFAULT_POSIX2_VERSION, gl_USE_SYSTEM_EXTENSIONS, gl_PERL): (gl_IGNORE_UNUSED_LIBRARIES): Remove; now done by gnulib. (gl_EARLY): Add. (gl_MACROS): Call just after gl_EARLY, just for clarity. * src/c99-to-c98.diff: Remove patch to ls.c; no longer needed. * src/kill.c (strtoimax): Remove decl. * src/ls.c: Include "wcwidth.h" instead of rolling it ourselves. * src/wc.c: Likewise. * src/ls.c (sort_files): Rewrite to avoid need for C99-style declaration, so that we don't need to patch this file. * src/printf.c (strtoimax, strtoumax): Remove decls. * src/su.c: Include getpass.h. (getpass): remove. * src/system.h: Include mempcpy.h, stpcpy.h, strpbrk.h. Include inttypes.h unconditionally; remove decls it handles. * lib/Makefile.am: include gnulib.mk, so that we can remove most of this file. (AM_CPPFLAGS): Don't mention -I$(srcdir), since that's now done for us. (noinst_LIBRARIES, LDDADD, DEFS): Remove. (libcoreutils_a_SOURCES): Trim down greatly, just to the files that aren't in gnulib. Remove defns gnulib does for us. * m4/check-decl.m4 (gl_CHECK_DECLS): Don't include stdio.h, string.h, stdlib.h, unistd.h, sys/time.h, time.h.  Use AC_CHECK_DECLS_ONCE for free, getenv, geteuid, getlogin, getuid, lseek, malloc, memchr, realloc.  Don't check for getutent, memrchr, nanosleep, stpcpy, strndup, strnlen, strstr, strtoul, strtoull. (_gl_DECL_HEADERS): Remove; all uses removed. * m4/jm-macros.m4 (gl_MACROS): Move AC_PREREQ into configure.ac for the benefit of gnulib-tool.  Call gl_INIT. Do not call or require macros that gnulib will handle for us. Don't check for fchmod, hasmntopt, isascii, lchown, listmntent, mempcpy, realpath, wcrtomb, tzset. (gl_CHECK_ALL_HEADERS): Don't check for sys/statvfs.h, sys/vfs.h, sys/mount.h. (gl_CHECK_ALL_TYPES): Require AC_TYPE_UNSIGNED_LONG_LONG_INT. Don't check for struct stat.st_blksize. Don't require AC_STRUCT_ST_DM_MODE, gt_TYPE_SSIZE_T, gl_AC_TYPE_UINT32_T, gl_AC_TYPE_UINTMAX_T, gl_AC_TYPE_UINTPTR_T, gl_AC_TYPE_UNSIGNED_LONG_LONG. * m4/prereq.m4 (gl_PREREQ): Require gl_FUNC_XFTS, gl_ROOT_DEV_INO. Don't require macros that gnulib does for us. * m4/stat-prog.m4 (cu_PREREQ_STAT_PROG): Don't check for sys/sysmacros.h.  Don't check for statvfs.  Use AC_CHECK_HEADERS_ONCE for netinet/in.h, nfs/nfs_clnt.h, nfs/vfs.h. Don't require gl_AC_TYPE_LONG_LONG, gt_HEADER_INTTYPES_H.
  * src/su.c (usage): Correct typo in --help output: s/commmand/command/ Reported by Tim Waugh. Also remove the comment duplicating much of --help output.
  (log_su, run_shell): Use new last_component, in place of base_name.
  Remove unnecessary parens in `#if defined (SYMBOL)' expressions.
  Update FSF postal mail address.
  Update FSF postal mail address.
  (run_shell): Pass a new n_additional_args arg, so that the callee doesn't have to count 'em.  All callers changed. Don't allocate more space for the arg vector than we'll need. Use memcpy to copy the args rather than rolling our own loop. Use size_t for sizes. (fast_startup, simulate_login, change_environment, log_su, correct_password, restricted_shell, main): Use bool for booleans. (longopts): Don't assume change_environment is an int. Use NULL, not 0, for pointers. (xsetenv): New function, replacing xputenv and concat. All callers changed. (elements): Remove; no longer needed. (log_su, correct_passwd, main): Prefer !x to x==NULL. (log_su): 2 -> STDERR_FILENO. (modify_environment, main): Don't assume that getenv's returned value has an indefinite lifetime. (modify_environment): Allocate a larger environ. (main): Remove an impossible 'case 0'; if it happens now, it'll get diagnosed.  Don't assume getpwnam results outlive endpwent. Check for null or empty pw_name, pw_dir and for null pw_passwd.
  (correct_password, restricted_shell, main): Prefer the notation `STREQ (a, b)' over `strcmp (a, b) == 0'.
  ...