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authorVineet Gupta <vgupta@synopsys.com>2013-03-14 17:51:24 +0530
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-03-14 22:27:19 +0100
commit1759f84c2a8c3dfd2705a2059754c4d0f1f8ca4b (patch)
tree3e1a58fedbd193793fd18711ffc4f8322d40f397 /libc/sysdeps/linux/common/lseek.c
parent58668975669a8549c52a8075cf4358203f0e613d (diff)
leek: if lseek syscall is not available, use lseek64 even for !LFS
With Busybox and uClibc - both built w/o LFS, this caused ash to be completely broken, as lseek was simply returning error. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/common/lseek.c')
-rw-r--r--libc/sysdeps/linux/common/lseek.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/common/lseek.c b/libc/sysdeps/linux/common/lseek.c
index 26953ae66..500c6bf9d 100644
--- a/libc/sysdeps/linux/common/lseek.c
+++ b/libc/sysdeps/linux/common/lseek.c
@@ -15,11 +15,20 @@
# define __NR___lseek_nocancel __NR_lseek
_syscall3(off_t, __NC(lseek), int, fd, off_t, offset, int, whence)
/* Use lseek64 if __NR_lseek is not defined but UCLIBC_HAS_LFS is enabled */
-#elif !defined __NR_lseek && defined __NR_llseek \
- && __WORDSIZE == 32 && __UCLIBC_HAS_LFS__
+#elif !defined __NR_lseek && defined __NR_llseek
+#include <endian.h>
off_t __NC(lseek)(int fd, off_t offset, int whence)
{
+#if defined __UCLIBC_HAS_LFS__
return lseek64(fd, offset, whence);
+#elif __WORDSIZE == 32
+ __off64_t result;
+ __off_t high = 0;
+ return INLINE_SYSCALL(llseek, 5, fd,
+ __LONG_LONG_PAIR(high, offset),
+ &result, whence) ?: result;
+#endif
+/* No need to handle __WORDSIZE == 64 as such a kernel won't define __NR_llseek */
}
#else
# include <errno.h>