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ae0d725005
Work around some portability problems with symlinks. * Makefile.in (GNULIB_MODULES): Add lstat, readlink, symlink. * configure.in (lstat, HAVE_LSTAT): Remove special hack. * lib/lstat.c, lib/readlink.c, lib/stat.c, lib/symlink.c: * m4/dos.m4, m4/lstat.m4, m4/readlink.m4, m4/stat.m4, m4/symlink.m4: New files, automatically generated from gnulib. * aclocal.m4, configure, lib/Makefile.in, lib/gnulib.mk: * lib/stdlib.in.h, m4/gl-comp.m4, m4/stdlib_h.m4: Regenerate. 2011-02-22 Paul Eggert <eggert@cs.ucla.edu> [src/ChangeLog] Work around some portability problems with symlinks. * fileio.c (Frename_file, Fmake_symbolic_link, Ffile_symlink_p): Simplify the code by assuming that the readlink and symlink calls exist, even if they always fail on this host. (Ffile_readable_p): Likewise, for fifos. * config.in: Regenerate.
46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
# serial 4
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# See if we need to provide symlink replacement.
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dnl Copyright (C) 2009-2011 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# Written by Eric Blake.
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AC_DEFUN([gl_FUNC_SYMLINK],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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AC_CHECK_FUNCS_ONCE([symlink])
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dnl The best we can do on mingw is provide a dummy that always fails, so
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dnl that compilation can proceed with fewer ifdefs. On FreeBSD 7.2, AIX 7.1,
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dnl and Solaris 9, we want to fix a bug with trailing slash handling.
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if test $ac_cv_func_symlink = no; then
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HAVE_SYMLINK=0
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AC_LIBOBJ([symlink])
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else
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AC_CACHE_CHECK([whether symlink handles trailing slash correctly],
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[gl_cv_func_symlink_works],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[[#include <unistd.h>
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]],
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[[int result = 0;
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if (!symlink ("a", "conftest.link/"))
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result |= 1;
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if (symlink ("conftest.f", "conftest.lnk2"))
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result |= 2;
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else if (!symlink ("a", "conftest.lnk2/"))
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result |= 4;
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return result;
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]])],
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[gl_cv_func_symlink_works=yes], [gl_cv_func_symlink_works=no],
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[gl_cv_func_symlink_works="guessing no"])
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rm -f conftest.f conftest.link conftest.lnk2])
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if test "$gl_cv_func_symlink_works" != yes; then
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REPLACE_SYMLINK=1
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AC_LIBOBJ([symlink])
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fi
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fi
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])
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