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authorCarmelo Amoroso <carmelo.amoroso@st.com>2008-09-09 12:01:37 +0000
committerCarmelo Amoroso <carmelo.amoroso@st.com>2008-09-09 12:01:37 +0000
commit33bcf733559a1108049c1d33ea8fafce0150e5f8 (patch)
tree571fd5ac0719f1a2fa010427085b1582df25e764 /libc/sysdeps/linux/common
parent1cf466022bd863dd8f529d6da52480f445fceb96 (diff)
Use getdents syscall if kernel provide supports for this
instead of relying upon getdents64. Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/sysdeps/linux/common')
-rw-r--r--libc/sysdeps/linux/common/getdents.c39
1 files changed, 33 insertions, 6 deletions
diff --git a/libc/sysdeps/linux/common/getdents.c b/libc/sysdeps/linux/common/getdents.c
index d858eab91..97c6d8b06 100644
--- a/libc/sysdeps/linux/common/getdents.c
+++ b/libc/sysdeps/linux/common/getdents.c
@@ -18,8 +18,7 @@
#include <bits/kernel_types.h>
/* With newer versions of linux, the getdents syscall returns d_type
- * information after the name field. Someday, we should add support for
- * that instead of always calling getdents64 ...
+ * information after the name field.
*
* See __ASSUME_GETDENTS32_D_TYPE in glibc's kernel-features.h for specific
* version / arch details.
@@ -39,14 +38,42 @@ struct kernel_dirent
ssize_t __getdents (int fd, char *buf, size_t nbytes) attribute_hidden;
-#if ! defined __UCLIBC_HAS_LFS__ || ! defined __NR_getdents64
+#define __NR___syscall_getdents __NR_getdents
+static inline _syscall3(int, __syscall_getdents, int, fd, unsigned char *, kdirp, size_t, count);
+
+#ifdef __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
/* Experimentally off - libc_hidden_proto(memcpy) */
libc_hidden_proto(lseek)
-#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;