diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2012-10-11 11:30:59 +0100 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-02-20 13:45:12 +0100 |
| commit | 92b784d6a58d8baa52289bea6a286752c3e6200e (patch) | |
| tree | e6d23fd7c9aed5003bf6419df742ea0fd8a6a4ef /libc/sysdeps/linux/common/getdents.c | |
| parent | 524744db1f05b57dc254419009370a8577a49894 (diff) | |
getdents: Use getdents64 if arch does not have the getdents syscall
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/common/getdents.c')
| -rw-r--r-- | libc/sysdeps/linux/common/getdents.c | 50 |
1 files changed, 36 insertions, 14 deletions
diff --git a/libc/sysdeps/linux/common/getdents.c b/libc/sysdeps/linux/common/getdents.c index f4fb7476e..b65524eee 100644 --- a/libc/sysdeps/linux/common/getdents.c +++ b/libc/sysdeps/linux/common/getdents.c @@ -26,6 +26,7 @@ * version / arch details. */ +# ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__ struct kernel_dirent { long int d_ino; @@ -33,11 +34,16 @@ struct kernel_dirent unsigned short int d_reclen; char d_name[256]; }; +# else +# define kernel_dirent dirent +# endif -#define __NR___syscall_getdents __NR_getdents +# if defined __NR_getdents +# define __NR___syscall_getdents __NR_getdents static __always_inline _syscall3(int, __syscall_getdents, int, fd, unsigned char *, kdirp, size_t, count) +# endif -#if defined __ASSUME_GETDENTS32_D_TYPE +# if defined __ASSUME_GETDENTS32_D_TYPE && defined __NR_getdents ssize_t __getdents (int fd, char *buf, size_t nbytes) { @@ -66,14 +72,14 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes) return retval; } -#elif ! defined __UCLIBC_HAS_LFS__ || ! defined __NR_getdents64 +# elif ! defined __UCLIBC_HAS_LFS__ || !defined __NR_getdents64 -# include <assert.h> -# include <stddef.h> -# include <errno.h> -# include <unistd.h> -# include <sys/param.h> -# include <bits/uClibc_alloc.h> +# include <assert.h> +# include <stddef.h> +# include <errno.h> +# include <unistd.h> +# include <sys/param.h> +# include <bits/uClibc_alloc.h> ssize_t __getdents (int fd, char *buf, size_t nbytes) { @@ -85,6 +91,7 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes) const size_t size_diff = (offsetof (struct dirent, d_name) - offsetof (struct kernel_dirent, d_name)); +# ifdef __ARCH_HAS_DEPRECATED_SYSCALLS__ red_nbytes = MIN (nbytes - ((nbytes / (offsetof (struct dirent, d_name) + 14)) * size_diff), nbytes - size_diff); @@ -93,6 +100,21 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes) skdp = kdp = stack_heap_alloc(red_nbytes); retval = __syscall_getdents(fd, (unsigned char *)kdp, red_nbytes); +# else + + dp = (struct dirent *) buf; + skdp = kdp = stack_heap_alloc(nbytes); + + retval = INLINE_SYSCALL(getdents64, 3, fd, (unsigned char *)kdp, nbytes); + if (retval > 0) { + /* Did we overflow? */ + if (kdp->__pad1 || kdp->__pad2) { + __set_errno(EINVAL); + return -1; + } + } +# endif + if (retval == -1) { stack_heap_free(skdp); return -1; @@ -134,9 +156,9 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes) return (char *) dp - buf; } -#elif __WORDSIZE == 32 +# elif __WORDSIZE == 32 && !defined __NR_getdents64 -# include <stddef.h> +# include <stddef.h> ssize_t __getdents (int fd, char *buf, size_t nbytes) { @@ -163,10 +185,10 @@ ssize_t __getdents (int fd, char *buf, size_t nbytes) return ret; } -#endif +# endif -#if defined __UCLIBC_HAS_LFS__ && ! defined __NR_getdents64 +# if defined __UCLIBC_HAS_LFS__ && ! defined __NR_getdents64 strong_alias(__getdents,__getdents64) -#endif +# endif #endif |