utimes.m4

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Hash : d4c637e5
Author :
Date : 2020-08-15T16:54:17

Support compiling without -loldnames on native Windows.

* m4/gnulib-common.m4 (GL_MDA_DEFINES, _GL_MDA_DEFINES): New macros.
* m4/chown.m4 (AC_FUNC_CHOWN): In the test programs, use GL_MDA_DEFINES.
(gl_FUNC_CHOWN, gl_FUNC_CHOWN_FOLLOWS_SYMLINK): Likewise.
* m4/dup.m4 (gl_FUNC_DUP): Likewise.
* m4/dup2.m4 (gl_FUNC_DUP2): Likewise.
* m4/fchdir.m4 (gl_FUNC_FCHDIR): Likewise.
* m4/fchmodat.m4 (gl_FUNC_FCHMODAT): Likewise.
* m4/fchownat.m4 (gl_FUNC_FCHOWNAT_EMPTY_FILENAME_BUG): Likewise.
* m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Likewise.
* m4/fcntl.m4 (gl_FUNC_FCNTL): Likewise.
* m4/fdopen.m4 (gl_FUNC_FDOPEN): Likewise.
* m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Likewise.
* m4/fflush.m4 (gl_FUNC_FFLUSH_STDIN): Likewise.
* m4/fopen.m4 (gl_FUNC_FOPEN_GNU): Likewise.
* m4/freopen.m4 (gl_FUNC_FREOPEN): Likewise.
* m4/futimens.m4 (gl_FUNC_FUTIMENS): Likewise.
* m4/getcwd-abort-bug.m4 (gl_FUNC_GETCWD_ABORT_BUG): Likewise.
* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Likewise.
* m4/getcwd.m4 (gl_FUNC_GETCWD_NULL, gl_FUNC_GETCWD_SIGNATURE):
Likewise.
* m4/getdtablesize.m4 (gl_FUNC_GETDTABLESIZE): Likewise.
* m4/linkat.m4 (gl_FUNC_LINKAT): Likewise.
* m4/lseek.m4 (gl_FUNC_LSEEK): Likewise.
* m4/mkdir.m4 (gl_FUNC_MKDIR): Likewise.
* m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Likewise.
* m4/mktime.m4 (gl_FUNC_MKTIME_WORKS): Likewise.
* m4/open-slash.m4 (gl_OPEN_TRAILING_SLASH_BUG): Likewise.
* m4/poll.m4 (gl_FUNC_POLL): Likewise.
* m4/posix_spawn.m4 (gl_POSIX_SPAWN_WORKS): Likewise.
* m4/pread.m4 (gl_FUNC_PREAD): Likewise.
* m4/pselect.m4 (gl_FUNC_PSELECT): Likewise.
* m4/pthread_sigmask.m4 (gl_FUNC_PTHREAD_SIGMASK): Likewise.
* m4/ptsname_r.m4 (gl_PREREQ_PTSNAME_R): Likewise.
* m4/putenv.m4 (gl_FUNC_PUTENV): Likewise.
* m4/pwrite.m4 (gl_FUNC_PWRITE): Likewise.
* m4/rename.m4 (gl_FUNC_RENAME): Likewise.
* m4/rmdir-errno.m4 (gl_FUNC_RMDIR_NOTEMPTY): Likewise.
* m4/rmdir.m4 (gl_FUNC_RMDIR): Likewise.
* m4/select.m4 (gl_FUNC_SELECT): Likewise.
* m4/setenv.m4 (gl_FUNC_UNSETENV): Likewise.
* m4/strncat.m4 (gl_FUNC_STRNCAT): Likewise.
* m4/ttyname_r.m4 (gl_FUNC_TTYNAME_R): Likewise.
* m4/unlink-busy.m4 (gl_FUNC_UNLINK_BUSY_TEXT): Likewise.
* m4/unlink.m4 (gl_FUNC_UNLINK): Likewise.
* m4/utimens.m4 (gl_UTIMENS): Likewise.
* m4/utimensat.m4 (gl_FUNC_UTIMENSAT): Likewise.
* m4/utimes.m4 (gl_FUNC_UTIMES): Likewise.
* m4/canonicalize.m4 (gl_CANONICALIZE_LGPL): On native Windows, don't
test for getcwd.
* m4/utime.m4 (gl_FUNC_UTIME): On native Windows, don't test for utime.
* m4/wcsdup.m4 (gl_FUNC_WCSDUP): To test for wcsdup, use a test program
with GL_MDA_DEFINES.
* lib/c++defs.h (_GL_CXXALIAS_MDA): New macro.
* lib/fcntl.in.h (creat, open):  On native Windows, use the underscore-
prefixed symbol.
* lib/search.in.h (lfind, lsearch): Likewise.
* lib/stdio.in.h (fcloseall, fdopen, fileno, getw, putw, tempnam):
Likewise.
* lib/stdlib.in.h (ecvt, fcvt, gcvt, mktemp, putenv): Likewise.
* lib/string.in.h (memccpy, strdup): Likewise.
* lib/sys_stat.in.h (chmod, umask): Likewise.
* lib/time.in.h (tzset): Likewise.
* lib/unistd.in.h (access, chdir, close, dup, dup2, execl, execle,
execlp, execv, execve, execvp, execvpe, getcwd, getpid, isatty, lseek,
read, rmdir, swab, unlink, write): Likewise.
* lib/utime.in.h (utime): Likewise.
* lib/wchar.in.h (wcsdup): Likewise.
* lib/math.in.h (j0, j1, jn, y0, y1, yn):  Likewise.
(isfinite, isinf, isnan, signbit): On native Windows, don't define as an
rpl_-prefixed macro.
* lib/canonicalize-lgpl.c (__getcwd): On native Windows, use _getcwd.
* lib/close.c (close_nothrow): On native Windows, use _close.
* lib/creat.c (orig_creat): On native Windows, use _creat.
* lib/dup.c (dup_nothrow): On native Windows, use _dup.
* lib/dup2.c (dup2_nothrow): Use _dup2.
* lib/fdopen.c (fdopen_nothrow): On native Windows, use _fdopen.
* lib/getcwd-lgpl.c: On native Windows, use _getcwd.
* lib/getcwd.c (getcwd_nothrow): Use _getcwd also on mingw.
* lib/open.c (orig_open): On native Windows, use _open.
* lib/read.c (read_nothrow): Use _read.
* lib/rmdir.c: On native Windows, use _rmdir.
* lib/unlink.c: On native Windows, use _unlink.
* lib/write.c (write_nothrow): Use _write.
* lib/sys_select.in.h (close): With clang, don't attach a warning on an
undefined symbol.
* lib/sys_socket.in.h (close): Likewise.
* lib/sys_time.in.h (close): Likewise.
* tests/test-spawn-pipe-child.c: On native Windows, use _fdopen.

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m4/utimes.m4

# Detect some bugs in glibc's implementation of utimes.
# serial 8

dnl Copyright (C) 2003-2005, 2009-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

# See if we need to work around bugs in glibc's implementation of
# utimes from 2003-07-12 to 2003-09-17.
# First, there was a bug that would make utimes set mtime
# and atime to zero (1970-01-01) unconditionally.
# Then, there was code to round rather than truncate.
# Then, there was an implementation (sparc64, Linux-2.4.28, glibc-2.3.3)
# that didn't honor the NULL-means-set-to-current-time semantics.
# Finally, there was also a version of utimes that failed on read-only
# files, while utime worked fine (linux-2.2.20, glibc-2.2.5).
#
# From Jim Meyering, with suggestions from Paul Eggert.

AC_DEFUN([gl_FUNC_UTIMES],
[
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  AC_CACHE_CHECK([whether the utimes function works],
                 [gl_cv_func_working_utimes],
    [AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <utime.h>
#include <errno.h>
]GL_MDA_DEFINES[

static int
inorder (time_t a, time_t b, time_t c)
{
  return a <= b && b <= c;
}

int
main ()
{
  int result = 0;
  char const *file = "conftest.utimes";
  /* On OS/2, file timestamps must be on or after 1980 in local time,
     with an even number of seconds.  */
  static struct timeval timeval[2] = {{315620000 + 10, 10},
                                      {315620000 + 1000000, 999998}};

  /* Test whether utimes() essentially works.  */
  {
    struct stat sbuf;
    FILE *f = fopen (file, "w");
    if (f == NULL)
      result |= 1;
    else if (fclose (f) != 0)
      result |= 1;
    else if (utimes (file, timeval) != 0)
      result |= 2;
    else if (lstat (file, &sbuf) != 0)
      result |= 1;
    else if (!(sbuf.st_atime == timeval[0].tv_sec
               && sbuf.st_mtime == timeval[1].tv_sec))
      result |= 4;
    if (unlink (file) != 0)
      result |= 1;
  }

  /* Test whether utimes() with a NULL argument sets the file's timestamp
     to the current time.  Use 'fstat' as well as 'time' to
     determine the "current" time, to accommodate NFS file systems
     if there is a time skew between the host and the NFS server.  */
  {
    int fd = open (file, O_WRONLY|O_CREAT, 0644);
    if (fd < 0)
      result |= 1;
    else
      {
        time_t t0, t2;
        struct stat st0, st1, st2;
        if (time (&t0) == (time_t) -1)
          result |= 1;
        else if (fstat (fd, &st0) != 0)
          result |= 1;
        else if (utimes (file, timeval) != 0
                 && (errno != EACCES
                     /* OS/2 kLIBC utimes fails on opened files.  */
                     || close (fd) != 0
                     || utimes (file, timeval) != 0
                     || (fd = open (file, O_WRONLY)) < 0))
          result |= 2;
        else if (utimes (file, NULL) != 0
                 && (errno != EACCES
                     /* OS/2 kLIBC utimes fails on opened files.  */
                     || close (fd) != 0
                     || utimes (file, NULL) != 0
                     || (fd = open (file, O_WRONLY)) < 0))
          result |= 8;
        else if (fstat (fd, &st1) != 0)
          result |= 1;
        else if (write (fd, "\n", 1) != 1)
          result |= 1;
        else if (fstat (fd, &st2) != 0)
          result |= 1;
        else if (time (&t2) == (time_t) -1)
          result |= 1;
        else
          {
            int m_ok_POSIX = inorder (t0, st1.st_mtime, t2);
            int m_ok_NFS = inorder (st0.st_mtime, st1.st_mtime, st2.st_mtime);
            if (! (st1.st_atime == st1.st_mtime))
              result |= 16;
            if (! (m_ok_POSIX || m_ok_NFS))
              result |= 32;
          }
        if (close (fd) != 0)
          result |= 1;
      }
    if (unlink (file) != 0)
      result |= 1;
  }

  /* Test whether utimes() with a NULL argument works on read-only files.  */
  {
    int fd = open (file, O_WRONLY|O_CREAT, 0444);
    if (fd < 0)
      result |= 1;
    else if (close (fd) != 0)
      result |= 1;
    else if (utimes (file, NULL) != 0)
      result |= 64;
    if (unlink (file) != 0)
      result |= 1;
  }

  return result;
}
  ]])],
       [gl_cv_func_working_utimes=yes],
       [gl_cv_func_working_utimes=no],
       [case "$host_os" in
                   # Guess yes on musl systems.
          *-musl*) gl_cv_func_working_utimes="guessing yes" ;;
                   # Guess no on native Windows.
          mingw*)  gl_cv_func_working_utimes="guessing no" ;;
          *)       gl_cv_func_working_utimes="$gl_cross_guess_normal" ;;
        esac
       ])
    ])

  case "$gl_cv_func_working_utimes" in
    *yes)
      AC_DEFINE([HAVE_WORKING_UTIMES], [1], [Define if utimes works properly.])
      ;;
  esac
])

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kc3-lang/gnulib/m4/utimes.m4

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m4/utimes.m4