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-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
4 files changed, 211 insertions, 13 deletions
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 2024-12-23 22:51:24 +0000