win32: implement readlink(2)

Provide an implementation of readlink(2) based on code from Git
for Windows.  This version only supports symbolic links, not
mount points, as the latter seem to work well enough as-is.

With this change the ls and stat applets can display the targets
of symbolic links.  The readlink applet has been enabled in the
default configuration.

2 files changed, 3 insertions, 3 deletions

diff --git a/coreutils/ls.c b/coreutils/ls.c
index c5402de30..6be3eb291 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -492,7 +492,7 @@ static NOINLINE unsigned display_single(const struct dnode *dn)
         /* Do readlink early, so that if it fails, error message
          * does not appear *inside* the "ls -l" line */
         lpath = NULL;
-#if !ENABLE_PLATFORM_MINGW32
+#if ENABLE_PLATFORM_POSIX || ENABLE_FEATURE_READLINK2
         if (opt & OPT_l)
                 if (S_ISLNK(dn->dn_mode))
                         lpath = xmalloc_readlink_or_warn(dn->fullname);
diff --git a/coreutils/stat.c b/coreutils/stat.c
index 32bc5e2d3..cf13af0b6 100644
--- a/coreutils/stat.c
+++ b/coreutils/stat.c
@@ -317,7 +317,7 @@ static void FAST_FUNC print_stat(char *pformat, const char m,
                 printfs(pformat, filename);
         } else if (m == 'N') {
                 strcatc(pformat, 's');
-#if !ENABLE_PLATFORM_MINGW32
+#if ENABLE_PLATFORM_POSIX || ENABLE_FEATURE_READLINK2
                 if (S_ISLNK(statbuf->st_mode)) {
                         char *linkname = xmalloc_readlink_or_warn(filename);
                         if (linkname == NULL)
@@ -712,7 +712,7 @@ static bool do_stat(const char *filename, const char *format)
                 gw_ent = getgrgid(statbuf.st_gid);
                 pw_ent = getpwuid(statbuf.st_uid);
 
-#if !ENABLE_PLATFORM_MINGW32
+#if ENABLE_PLATFORM_POSIX || ENABLE_FEATURE_READLINK2
                 if (S_ISLNK(statbuf.st_mode))
                         linkname = xmalloc_readlink_or_warn(filename);
                 if (linkname) {