aboutsummaryrefslogtreecommitdiff
path: root/io
diff options
context:
space:
mode:
Diffstat (limited to 'io')
-rw-r--r--io/ftw.c88
1 files changed, 76 insertions, 12 deletions
diff --git a/io/ftw.c b/io/ftw.c
index 45001d5b54..227f3f3b52 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -22,7 +22,42 @@
# include <config.h>
#endif
-#include <dirent.h>
+#if __GNUC__
+# define alloca __builtin_alloca
+#else
+# if HAVE_ALLOCA_H
+# include <alloca.h>
+# else
+# ifdef _AIX
+ # pragma alloca
+# else
+char *alloca ();
+# endif
+# endif
+#endif
+
+#if defined _LIBC
+# include <dirent.h>
+# define NAMLEN(dirent) _D_EXACT_NAMLEN (dirent)
+#else
+# if HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen ((dirent)->d_name)
+# else
+# define dirent direct
+# define NAMLEN(dirent) (dirent)->d_namlen
+# if HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# if HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# if HAVE_NDIR_H
+# include <ndir.h>
+# endif
+# endif
+#endif
+
#include <errno.h>
#include <ftw.h>
#include <limits.h>
@@ -39,6 +74,15 @@
# include <sys/stat.h>
#endif
+#if ! _LIBC && !HAVE_DECL_STPCPY && !defined stpcpy
+char *stpcpy ();
+#endif
+
+#if ! _LIBC && ! defined HAVE_MEMPCPY && ! defined mempcpy
+/* Be CAREFUL that there are no side effects in N. */
+# define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
+#endif
+
/* #define NDEBUG 1 */
#include <assert.h>
@@ -50,11 +94,16 @@
# undef __fchdir
# define __fchdir fchdir
# undef __getcwd
-# define __getcwd getcwd
+# define __getcwd(P, N) xgetcwd ()
+extern char *xgetcwd (void);
+# undef __mempcpy
+# define __mempcpy mempcpy
# undef __opendir
# define __opendir opendir
# undef __readdir64
# define __readdir64 readdir
+# undef __stpcpy
+# define __stpcpy stpcpy
# undef __tdestroy
# define __tdestroy tdestroy
# undef __tfind
@@ -69,6 +118,15 @@
# define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
+/* Arrange to make lstat calls go through the wrapper function
+ on systems with an lstat function that does not dereference symlinks
+ that are specified with a trailing slash. */
+#if ! _LIBC && ! LSTAT_FOLLOWS_SLASHED_SYMLINK
+int rpl_lstat (const char *, struct stat *);
+# undef lstat
+# define lstat(Name, Stat_buf) rpl_lstat(Name, Stat_buf)
+#endif
+
#ifndef __set_errno
# define __set_errno(Val) errno = (Val)
#endif
@@ -79,8 +137,13 @@
# define NFTW_NAME nftw
# define INO_T ino_t
# define STAT stat
-# define LXSTAT __lxstat
-# define XSTAT __xstat
+# ifdef _LIBC
+# define LXSTAT __lxstat
+# define XSTAT __xstat
+# else
+# define LXSTAT(V,f,sb) lstat (f,sb)
+# define XSTAT(V,f,sb) stat (f,sb)
+# endif
# define FTW_FUNC_T __ftw_func_t
# define NFTW_FUNC_T __nftw_func_t
#endif
@@ -124,7 +187,7 @@ struct ftw_data
int flags;
/* Conversion array for flag values. It is the identity mapping for
- `nftw' calls, otherwise it maps the values to those know by
+ `nftw' calls, otherwise it maps the values to those known by
`ftw'. */
const int *cvt_arr;
@@ -140,9 +203,8 @@ struct ftw_data
};
-/* Internally we use the FTW_* constants used for `nftw'. When the
- process called `ftw' we must reduce the flag to the known flags
- for `ftw'. */
+/* Internally we use the FTW_* constants used for `nftw'. When invoked
+ as `ftw', map each flag to the subset of values used by `ftw'. */
static const int nftw_arr[] =
{
FTW_F, FTW_D, FTW_DNR, FTW_NS, FTW_SL, FTW_DP, FTW_SLN
@@ -188,7 +250,9 @@ add_object (struct ftw_data *data, struct STAT *st)
static inline int
find_object (struct ftw_data *data, struct STAT *st)
{
- struct known_object obj = { .dev = st->st_dev, .ino = st->st_ino };
+ struct known_object obj;
+ obj.dev = st->st_dev;
+ obj.ino = st->st_ino;
return __tfind (&obj, &data->known_objects, object_compare) != NULL;
}
@@ -216,7 +280,7 @@ open_dir_stream (struct ftw_data *data, struct dir_data *dirp)
while ((d = __readdir64 (st)) != NULL)
{
- size_t this_len = _D_EXACT_NAMLEN (d);
+ size_t this_len = NAMLEN (d);
if (actsize + this_len + 2 >= bufsize)
{
char *newp;
@@ -354,7 +418,7 @@ process_entry (struct ftw_data *data, struct dir_data *dir, const char *name,
if (result == 0 && (data->flags & FTW_CHDIR))
{
- /* Change back to current directory. */
+ /* Change back to the parent directory. */
int done = 0;
if (dir->stream != NULL)
if (__fchdir (dirfd (dir->stream)) == 0)
@@ -452,7 +516,7 @@ ftw_dir (struct ftw_data *data, struct STAT *st)
while (dir.stream != NULL && (d = __readdir64 (dir.stream)) != NULL)
{
- result = process_entry (data, &dir, d->d_name, _D_EXACT_NAMLEN (d));
+ result = process_entry (data, &dir, d->d_name, NAMLEN (d));
if (result != 0)
break;
}