summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--libc/misc/dirent/dirstream.h4
-rw-r--r--libc/misc/dirent/readdir.c4
-rw-r--r--libc/misc/dirent/readdir64.c4
-rw-r--r--libc/misc/dirent/readdir64_r.c4
-rw-r--r--libc/misc/dirent/readdir_r.c4
-rw-r--r--libc/misc/dirent/scandir64.c145
-rw-r--r--libc/sysdeps/linux/common/Makefile2
-rw-r--r--libc/sysdeps/linux/common/getdents.c100
-rw-r--r--libc/sysdeps/linux/common/getdents64.c108
-rw-r--r--libc/sysdeps/linux/common/syscalls.c14
10 files changed, 297 insertions, 92 deletions
diff --git a/libc/misc/dirent/dirstream.h b/libc/misc/dirent/dirstream.h
index 92e81af0b..5cb63a23d 100644
--- a/libc/misc/dirent/dirstream.h
+++ b/libc/misc/dirent/dirstream.h
@@ -70,4 +70,8 @@ struct __dirstream {
#endif
}; /* stream data from opendir() */
+
+extern int __getdents(unsigned int fd, struct dirent *dirp, unsigned int count);
+extern int __getdents64 (unsigned int fd, struct dirent64 *dirp, unsigned int count);
+
#endif /* dirent.h */
diff --git a/libc/misc/dirent/readdir.c b/libc/misc/dirent/readdir.c
index d74f9abb7..8c5fd7f1a 100644
--- a/libc/misc/dirent/readdir.c
+++ b/libc/misc/dirent/readdir.c
@@ -5,8 +5,6 @@
#include <dirent.h>
#include "dirstream.h"
-extern int getdents __P ((unsigned int fd, struct dirent *dirp, unsigned int count));
-
struct dirent *readdir(DIR * dir)
{
@@ -25,7 +23,7 @@ struct dirent *readdir(DIR * dir)
do {
if (dir->dd_size <= dir->dd_nextloc) {
/* read dir->dd_max bytes of directory entries. */
- bytes = getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
+ bytes = __getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes <= 0) {
de = NULL;
goto all_done;
diff --git a/libc/misc/dirent/readdir64.c b/libc/misc/dirent/readdir64.c
index d30a4398f..ae9e771e8 100644
--- a/libc/misc/dirent/readdir64.c
+++ b/libc/misc/dirent/readdir64.c
@@ -20,8 +20,6 @@
#include <dirent.h>
#include "dirstream.h"
-extern int getdents64 __P ((unsigned int fd, struct dirent64 *dirp, unsigned int count));
-
struct dirent64 *readdir64(DIR * dir)
{
@@ -40,7 +38,7 @@ struct dirent64 *readdir64(DIR * dir)
do {
if (dir->dd_size <= dir->dd_nextloc) {
/* read dir->dd_max bytes of directory entries. */
- bytes = getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
+ bytes = __getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes <= 0) {
de = NULL;
goto all_done;
diff --git a/libc/misc/dirent/readdir64_r.c b/libc/misc/dirent/readdir64_r.c
index f4aeb7869..6b22261db 100644
--- a/libc/misc/dirent/readdir64_r.c
+++ b/libc/misc/dirent/readdir64_r.c
@@ -19,8 +19,6 @@
#include <dirent.h>
#include "dirstream.h"
-extern int getdents64 __P ((unsigned int fd, struct dirent64 *dirp, unsigned int count));
-
int readdir64_r(DIR *dir, struct dirent64 *entry, struct dirent64 **result)
{
@@ -41,7 +39,7 @@ int readdir64_r(DIR *dir, struct dirent64 *entry, struct dirent64 **result)
do {
if (dir->dd_size <= dir->dd_nextloc) {
/* read dir->dd_max bytes of directory entries. */
- bytes = getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
+ bytes = __getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes <= 0) {
*result = NULL;
ret = errno;
diff --git a/libc/misc/dirent/readdir_r.c b/libc/misc/dirent/readdir_r.c
index 423dcb810..50bc9bb6d 100644
--- a/libc/misc/dirent/readdir_r.c
+++ b/libc/misc/dirent/readdir_r.c
@@ -5,8 +5,6 @@
#include <dirent.h>
#include "dirstream.h"
-extern int getdents __P ((unsigned int fd, struct dirent *dirp, unsigned int count));
-
int readdir_r(DIR *dir, struct dirent *entry, struct dirent **result)
{
@@ -27,7 +25,7 @@ int readdir_r(DIR *dir, struct dirent *entry, struct dirent **result)
do {
if (dir->dd_size <= dir->dd_nextloc) {
/* read dir->dd_max bytes of directory entries. */
- bytes = getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
+ bytes = __getdents(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes <= 0) {
*result = NULL;
ret = errno;
diff --git a/libc/misc/dirent/scandir64.c b/libc/misc/dirent/scandir64.c
index d7543a61e..b4cc57a36 100644
--- a/libc/misc/dirent/scandir64.c
+++ b/libc/misc/dirent/scandir64.c
@@ -1,27 +1,24 @@
-/* -*- Mode: C; c-file-style: "gnu" -*- */
-/*
- Copyright (c) 2000 Petter Reinholdtsen
-
- Permission is hereby granted, free of charge, to any person
- obtaining a copy of this software and associated documentation
- files (the "Software"), to deal in the Software without
- restriction, including without limitation the rights to use, copy,
- modify, merge, publish, distribute, sublicense, and/or sell copies
- of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be
- included in all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- SOFTWARE.
-*/
+/* Copyright (C) 1992-1998, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA.
+ */
+
+/* Modified for uClibc by Erik Andersen
+ */
#include <features.h>
#ifdef __UCLIBC_HAS_LFS__
@@ -37,66 +34,80 @@
#ifdef __USE_FILE_OFFSET64
# undef __USE_FILE_OFFSET64
#endif
+
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
+#include <errno.h>
#include <sys/types.h>
#include "dirstream.h"
-
-int scandir64(const char *dir, struct dirent64 ***namelist,
- int (*selector) (const struct dirent64 *),
- int (*compar) (const __ptr_t, const __ptr_t))
+int scandir64(const char *dir, struct dirent64 ***namelist,
+ int (*selector) (const struct dirent64 *),
+ int (*compar) (const void *, const void *))
{
- DIR *d = opendir(dir);
+ DIR *dp = opendir (dir);
struct dirent64 *current;
- struct dirent64 **names;
- int count = 0;
- int pos = 0;
- int result = -1;
-
- if (NULL == d)
- return -1;
-
- while (NULL != readdir64(d))
- count++;
+ struct dirent64 **names = NULL;
+ size_t names_size = 0, pos;
+ int save;
- if (!(names = malloc(sizeof (struct dirent64 *) * count))) {
- closedir(d);
+ if (dp == NULL)
return -1;
- }
-
- rewinddir(d);
- while (NULL != (current = readdir64(d))) {
- if (NULL == selector || selector(current)) {
- struct dirent64 *copyentry = malloc(current->d_reclen);
-
- memcpy(copyentry, current, current->d_reclen);
-
- names[pos] = copyentry;
- pos++;
- }
- }
- result = closedir(d);
-
- if (pos != count) {
- struct dirent64 **tmp;
- if (!(tmp = realloc(names, sizeof (struct dirent64 *) * pos))) {
- free(names);
- return -1;
+ save = errno;
+ __set_errno (0);
+
+ pos = 0;
+ while ((current = readdir64 (dp)) != NULL)
+ if (selector == NULL || (*selector) (current))
+ {
+ struct dirent64 *vnew;
+ size_t dsize;
+
+ /* Ignore errors from selector or readdir64 */
+ __set_errno (0);
+
+ if (unlikely(pos == names_size))
+ {
+ struct dirent64 **new;
+ if (names_size == 0)
+ names_size = 10;
+ else
+ names_size *= 2;
+ new = (struct dirent64 **) realloc (names, names_size * sizeof (struct dirent64 *));
+ if (new == NULL)
+ break;
+ names = new;
+ }
+
+ dsize = &current->d_name[_D_ALLOC_NAMLEN (current)] - (char *) current;
+ vnew = (struct dirent64 *) malloc (dsize);
+ if (vnew == NULL)
+ break;
+
+ names[pos++] = (struct dirent64 *) memcpy (vnew, current, dsize);
}
- names = tmp;
- }
-
- if (compar != NULL) {
- qsort(names, pos, sizeof (struct dirent64 *), compar);
+ if (unlikely(errno != 0))
+ {
+ save = errno;
+ closedir (dp);
+ while (pos > 0)
+ free (names[--pos]);
+ free (names);
+ __set_errno (save);
+ return -1;
}
- *namelist = names;
+ closedir (dp);
+ __set_errno (save);
+ /* Sort the list if we have a comparison function to sort with. */
+ if (compar != NULL)
+ qsort (names, pos, sizeof (struct dirent64 *), compar);
+ *namelist = names;
return pos;
}
#endif /* __UCLIBC_HAS_LFS__ */
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index a59b0c39f..513625f1d 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -25,7 +25,7 @@ CSRC= waitpid.c getdnnm.c gethstnm.c getcwd.c \
cmsg_nxthdr.c longjmp.c open64.c ftruncate64.c \
truncate64.c getrlimit64.c setrlimit64.c creat64.c mmap64.c \
llseek.c pread_write.c _exit.c setuid.c sync.c getdirname.c \
- sendfile64.c xstatconv.c
+ sendfile64.c xstatconv.c getdents.c getdents64.c
ifneq ($(strip $(EXCLUDE_BRK)),y)
CSRC+=sbrk.c
endif
diff --git a/libc/sysdeps/linux/common/getdents.c b/libc/sysdeps/linux/common/getdents.c
new file mode 100644
index 000000000..47d829454
--- /dev/null
+++ b/libc/sysdeps/linux/common/getdents.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 1993, 1995-2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <alloca.h>
+#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 <sysdep.h>
+#include <sys/syscall.h>
+
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+struct kernel_dirent
+{
+ long int d_ino;
+ __kernel_off_t d_off;
+ unsigned short int d_reclen;
+ char d_name[256];
+};
+
+#define __NR___syscall_getdents __NR_getdents
+static inline _syscall3(int, __syscall_getdents, int, fd, unsigned char *, kdirp, size_t, count);
+
+
+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 = alloca (red_nbytes);
+
+ retval = __syscall_getdents(fd, (char *)kdp, red_nbytes);
+ if (retval == -1)
+ 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. */
+ __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);
+ }
+ return (char *) dp - buf;
+}
diff --git a/libc/sysdeps/linux/common/getdents64.c b/libc/sysdeps/linux/common/getdents64.c
new file mode 100644
index 000000000..0fb7336f3
--- /dev/null
+++ b/libc/sysdeps/linux/common/getdents64.c
@@ -0,0 +1,108 @@
+/* Copyright (C) 1993, 1995-2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <features.h>
+
+#ifdef __UCLIBC_HAS_LFS__
+
+#include <alloca.h>
+#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 <sysdep.h>
+#include <sys/syscall.h>
+
+
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+struct kernel_dirent64
+{
+ uint64_t d_ino;
+ int64_t d_off;
+ unsigned short int d_reclen;
+ unsigned char d_type;
+ char d_name[256];
+};
+
+
+#define __NR___syscall_getdents64 __NR_getdents64
+static inline _syscall3(int, __syscall_getdents64, int, fd, unsigned char *, dirp, size_t, count);
+
+
+ssize_t __getdents64 (int fd, char *buf, size_t nbytes)
+{
+ struct dirent64 *dp;
+ off64_t last_offset = -1;
+ ssize_t retval;
+ size_t red_nbytes;
+ struct kernel_dirent64 *skdp, *kdp;
+ const size_t size_diff = (offsetof (struct dirent64, d_name)
+ - offsetof (struct kernel_dirent64, d_name));
+
+ red_nbytes = MIN (nbytes - ((nbytes /
+ (offsetof (struct dirent64, d_name) + 14)) * size_diff),
+ nbytes - size_diff);
+
+ dp = (struct dirent64 *) buf;
+ skdp = kdp = alloca (red_nbytes);
+
+ retval = __syscall_getdents64(fd, (char *)kdp, red_nbytes);
+ if (retval == -1)
+ return -1;
+
+ while ((char *) kdp < (char *) skdp + retval) {
+ const size_t alignment = __alignof__ (struct dirent64);
+ /* 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);
+ lseek64(fd, last_offset, SEEK_SET);
+
+ if ((char *) dp == buf) {
+ /* The buffer the user passed in is too small to hold even
+ one entry. */
+ __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_dirent64, d_name));
+ dp = (struct dirent64 *) ((char *) dp + new_reclen);
+ kdp = (struct kernel_dirent64 *) (((char *) kdp) + kdp->d_reclen);
+ }
+ return (char *) dp - buf;
+}
+#endif /* __UCLIBC_HAS_LFS__ */
+
diff --git a/libc/sysdeps/linux/common/syscalls.c b/libc/sysdeps/linux/common/syscalls.c
index 620ee96e7..2e047f129 100644
--- a/libc/sysdeps/linux/common/syscalls.c
+++ b/libc/sysdeps/linux/common/syscalls.c
@@ -1226,11 +1226,7 @@ _syscall1(int, setfsgid, gid_t, gid);
//See llseek.c
//#define __NR_getdents 141
-#ifdef L_getdents
-#include <unistd.h>
-#include <dirent.h>
-_syscall3(int, getdents, int, fd, char *, dirp, size_t, count);
-#endif
+// See getdents.c
//#define __NR__newselect 142
#ifdef L__newselect
@@ -1766,13 +1762,7 @@ _syscall2(int, pivot_root, const char *, new_root, const char *, put_old);
//#define __NR_madvise1 219 /* delete when C lib stub is removed */
//#define __NR_getdents64 220
-#ifdef L_getdents64
-#ifdef __UCLIBC_HAS_LFS__
-#include <unistd.h>
-#include <dirent.h>
-_syscall3(int, getdents64, int, fd, char *, dirp, size_t, count);
-#endif /* __UCLIBC_HAS_LFS__ */
-#endif
+// See getdents64.c
//#define __NR_fcntl64 221
#ifdef L__fcntl64
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 22:46:24 +0000