zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/common/getdents.c b/ap/build/uClibc/libc/sysdeps/linux/common/getdents.c
new file mode 100644
index 0000000..46f7b8e
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/common/getdents.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <dirent.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+#include <bits/kernel_types.h>
+#include <bits/kernel-features.h>
+#include <bits/uClibc_alloc.h>
+
+#if !(defined __UCLIBC_HAS_LFS__ && defined __NR_getdents64 && __WORDSIZE == 64)
+/* If the condition above is met, __getdents is defined as an alias
+ * for __getdents64 (see getdents64.c). Otherwise...
+ */
+
+/* With newer versions of linux, the getdents syscall returns d_type
+ * information after the name field.
+ *
+ * See __ASSUME_GETDENTS32_D_TYPE in glibc's kernel-features.h for specific
+ * version / arch details.
+ */
+
+#ifndef offsetof
+# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
+struct kernel_dirent
+{
+ long int d_ino;
+ __kernel_off_t d_off;
+ unsigned short int d_reclen;
+ char d_name[256];
+};
+
+ssize_t __getdents (int fd, char *buf, size_t nbytes) attribute_hidden;
+
+#define __NR___syscall_getdents __NR_getdents
+static __always_inline _syscall3(int, __syscall_getdents, int, fd, unsigned char *, kdirp, size_t, count)
+
+#if defined __ASSUME_GETDENTS32_D_TYPE
+
+ssize_t __getdents (int fd, char *buf, size_t nbytes)
+{
+ ssize_t retval;
+
+ retval = __syscall_getdents(fd, (unsigned char *)buf, nbytes);
+
+ /* The kernel added the d_type value after the name. Change
+ this now. */
+ if (retval != -1) {
+ union {
+ struct kernel_dirent k;
+ struct dirent u;
+ } *kbuf = (void *) buf;
+
+ while ((char *) kbuf < buf + retval) {
+ char d_type = *((char *) kbuf + kbuf->k.d_reclen - 1);
+ memmove (kbuf->u.d_name, kbuf->k.d_name,
+ strlen (kbuf->k.d_name) + 1);
+ kbuf->u.d_type = d_type;
+
+ kbuf = (void *) ((char *) kbuf + kbuf->k.d_reclen);
+ }
+ }
+
+ return retval;
+}
+
+#elif ! defined __UCLIBC_HAS_LFS__ || ! defined __NR_getdents64
+
+ssize_t __getdents (int fd, char *buf, size_t nbytes)
+{
+ struct dirent *dp;
+ off_t last_offset = -1;
+ ssize_t retval;
+ size_t red_nbytes;
+ struct kernel_dirent *skdp, *kdp;
+ const size_t size_diff = (offsetof (struct dirent, d_name)
+ - offsetof (struct kernel_dirent, d_name));
+
+ red_nbytes = MIN (nbytes - ((nbytes /
+ (offsetof (struct dirent, d_name) + 14)) * size_diff),
+ nbytes - size_diff);
+
+ dp = (struct dirent *) buf;
+ skdp = kdp = stack_heap_alloc(red_nbytes);
+
+ retval = __syscall_getdents(fd, (unsigned char *)kdp, red_nbytes);
+ if (retval == -1) {
+ stack_heap_free(skdp);
+ return -1;
+ }
+
+ while ((char *) kdp < (char *) skdp + retval) {
+ const size_t alignment = __alignof__ (struct dirent);
+ /* Since kdp->d_reclen is already aligned for the kernel structure
+ this may compute a value that is bigger than necessary. */
+ size_t new_reclen = ((kdp->d_reclen + size_diff + alignment - 1)
+ & ~(alignment - 1));
+ if ((char *) dp + new_reclen > buf + nbytes) {
+ /* Our heuristic failed. We read too many entries. Reset
+ the stream. */
+ assert (last_offset != -1);
+ lseek(fd, last_offset, SEEK_SET);
+
+ if ((char *) dp == buf) {
+ /* The buffer the user passed in is too small to hold even
+ one entry. */
+ stack_heap_free(skdp);
+ __set_errno (EINVAL);
+ return -1;
+ }
+ break;
+ }
+
+ last_offset = kdp->d_off;
+ dp->d_ino = kdp->d_ino;
+ dp->d_off = kdp->d_off;
+ dp->d_reclen = new_reclen;
+ dp->d_type = DT_UNKNOWN;
+ memcpy (dp->d_name, kdp->d_name,
+ kdp->d_reclen - offsetof (struct kernel_dirent, d_name));
+ dp = (struct dirent *) ((char *) dp + new_reclen);
+ kdp = (struct kernel_dirent *) (((char *) kdp) + kdp->d_reclen);
+ }
+ stack_heap_free(skdp);
+ return (char *) dp - buf;
+}
+
+#elif __WORDSIZE == 32
+
+extern __typeof(__getdents) __getdents64 attribute_hidden;
+ssize_t __getdents (int fd, char *buf, size_t nbytes)
+{
+ struct dirent *dp;
+ struct dirent64 *dp64;
+ ssize_t ret = __getdents64 (fd, buf, nbytes);
+
+ if (ret <= 0)
+ return ret;
+
+ dp64 = (struct dirent64 *) buf;
+ buf += ret;
+ while ((void *) dp64 < (void *) buf) {
+ dp = (struct dirent *) dp64;
+ dp->d_ino = dp64->d_ino;
+ dp->d_off = dp64->d_off;
+ dp->d_reclen = dp64->d_reclen;
+ dp->d_type = dp64->d_type;
+ memmove (dp->d_name, dp64->d_name, dp->d_reclen - offsetof (struct dirent64, d_name));
+ memmove (dp64, dp, dp->d_reclen);
+ dp64 = ((void *) dp64) + dp->d_reclen;
+ }
+
+ return ret;
+}
+
+#endif
+
+#if defined __UCLIBC_HAS_LFS__ && ! defined __NR_getdents64
+attribute_hidden strong_alias(__getdents,__getdents64)
+#endif
+
+#endif