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authorManuel Novoa III <mjn3@codepoet.org>2003-11-17 01:24:07 +0000
committerManuel Novoa III <mjn3@codepoet.org>2003-11-17 01:24:07 +0000
commit5e3553a3b7bdb2667371db1c6dbee0ad49c8221c (patch)
tree4ddf76308fb9ea8e25518ef7398ccc632aced2a4 /libc/sysdeps
parent439df74f73edc3c2045080df470b89cb92e41a4e (diff)
If __NR_ftruncate64 isn't defined, do the best we can.
Diffstat (limited to 'libc/sysdeps')
-rw-r--r--libc/sysdeps/linux/common/ftruncate64.c24
1 files changed, 19 insertions, 5 deletions
diff --git a/libc/sysdeps/linux/common/ftruncate64.c b/libc/sysdeps/linux/common/ftruncate64.c
index 76b0c0636..61ca9339e 100644
--- a/libc/sysdeps/linux/common/ftruncate64.c
+++ b/libc/sysdeps/linux/common/ftruncate64.c
@@ -19,6 +19,8 @@
#include <stdint.h>
#include <sys/syscall.h>
+#if defined __UCLIBC_HAS_LFS__
+
#if defined __NR_ftruncate64
#if __WORDSIZE == 64 || (defined(__powerpc__) && defined (__UCLIBC_HAS_LFS__))
@@ -28,15 +30,12 @@ _syscall2(int, ftruncate64, int, fd, __off64_t, length);
#elif __WORDSIZE == 32
-#if defined __UCLIBC_HAS_LFS__
-
#ifndef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) __syscall_ftruncate64 (args)
#define __NR___syscall_ftruncate64 __NR_ftruncate64
static inline _syscall3(int, __syscall_ftruncate64, int, fd, int, high_length, int, low_length);
#endif
-
/* The exported ftruncate64 function. */
int ftruncate64 (int fd, __off64_t length)
{
@@ -44,11 +43,26 @@ int ftruncate64 (int fd, __off64_t length)
uint32_t high = length >> 32;
return INLINE_SYSCALL(ftruncate64, 3, fd, __LONG_LONG_PAIR (high, low));
}
-#endif /* __UCLIBC_HAS_LFS__ */
#else /* __WORDSIZE */
#error Your machine is not 64 bit or 32 bit, I am dazed and confused.
#endif /* __WORDSIZE */
-#endif
+#else /* __NR_ftruncate64 */
+
+int ftruncate64 (int fd, __off64_t length)
+{
+ __off_t x = (__off_t) length;
+
+ if (x == length) {
+ return ftruncate(fd, x);
+ }
+
+ __set_errno((x < 0) ? EINVAL : EFBIG);
+ return -1;
+}
+
+#endif /* __NR_ftruncate64 */
+
+#endif /* __UCLIBC_HAS_LFS__ */