[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-commits] [COMMIT ebc996f] linux-user: fix utimensat
From: |
Anthony Liguori |
Subject: |
[Qemu-commits] [COMMIT ebc996f] linux-user: fix utimensat |
Date: |
Tue, 16 Jun 2009 19:35:59 -0000 |
From: Riku Voipio <address@hidden>
The glibc function for utimensat glibc returns -EINVAL when the path is null
which is a different behaviour with the syscall.
path can be null because internally the glibc is using utimensat with
path null when implmenting futimens. If path is null, call futimes
instead.
don't try to copy timespec from user if is NULL.
Add configure check for older systems
Signed-off-by: Riku Voipio <address@hidden>
diff --git a/configure b/configure
index 85bc598..d3c9140 100755
--- a/configure
+++ b/configure
@@ -1285,6 +1285,25 @@ EOF
fi
fi
+# check if utimensat and futimens are supported
+utimens=no
+cat > $TMPC << EOF
+#define _ATFILE_SOURCE
+#define _GNU_SOURCE
+#include <stddef.h>
+#include <fcntl.h>
+
+int main(void)
+{
+ utimensat(AT_FDCWD, "foo", NULL, 0);
+ futimens(0, NULL);
+ return 0;
+}
+EOF
+if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
+ utimens=yes
+fi
+
# Check if tools are available to build documentation.
if test "$build_docs" = "yes" -a \( ! -x "`which texi2html 2>/dev/null`" -o !
-x "`which pod2man 2>/dev/null`" \) ; then
build_docs="no"
@@ -1682,6 +1701,9 @@ fi
if test "$atfile" = "yes" ; then
echo "#define CONFIG_ATFILE 1" >> $config_h
fi
+if test "$utimens" = "yes" ; then
+ echo "#define CONFIG_UTIMENSAT 1" >> $config_h
+fi
if test "$inotify" = "yes" ; then
echo "#define CONFIG_INOTIFY 1" >> $config_h
fi
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 056581d..9e4e061 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -406,13 +406,6 @@ static int sys_unlinkat(int dirfd, const char *pathname,
int flags)
return (unlinkat(dirfd, pathname, flags));
}
#endif
-#ifdef TARGET_NR_utimensat
-static int sys_utimensat(int dirfd, const char *pathname,
- const struct timespec times[2], int flags)
-{
- return (utimensat(dirfd, pathname, times, flags));
-}
-#endif
#else /* !CONFIG_ATFILE */
/*
@@ -471,12 +464,24 @@ _syscall3(int,sys_symlinkat,const char *,oldpath,
#if defined(TARGET_NR_unlinkat) && defined(__NR_unlinkat)
_syscall3(int,sys_unlinkat,int,dirfd,const char *,pathname,int,flags)
#endif
+
+#endif /* CONFIG_ATFILE */
+
+#ifdef CONFIG_UTIMENSAT
+static int sys_utimensat(int dirfd, const char *pathname,
+ const struct timespec times[2], int flags)
+{
+ if (pathname == NULL)
+ return futimens(dirfd, times);
+ else
+ return utimensat(dirfd, pathname, times, flags);
+}
+#else
#if defined(TARGET_NR_utimensat) && defined(__NR_utimensat)
_syscall4(int,sys_utimensat,int,dirfd,const char *,pathname,
const struct timespec *,tsp,int,flags)
#endif
-
-#endif /* CONFIG_ATFILE */
+#endif /* CONFIG_UTIMENSAT */
#ifdef CONFIG_INOTIFY
#include <sys/inotify.h>
@@ -6669,17 +6674,22 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#if defined(TARGET_NR_utimensat) && defined(__NR_utimensat)
case TARGET_NR_utimensat:
{
- struct timespec ts[2];
- target_to_host_timespec(ts, arg3);
- target_to_host_timespec(ts+1, arg3+sizeof(struct target_timespec));
+ struct timespec *tsp, ts[2];
+ if (!arg3) {
+ tsp = NULL;
+ } else {
+ target_to_host_timespec(ts, arg3);
+ target_to_host_timespec(ts+1, arg3+sizeof(struct
target_timespec));
+ tsp = ts;
+ }
if (!arg2)
- ret = get_errno(sys_utimensat(arg1, NULL, ts, arg4));
+ ret = get_errno(sys_utimensat(arg1, NULL, tsp, arg4));
else {
if (!(p = lock_user_string(arg2))) {
ret = -TARGET_EFAULT;
goto fail;
}
- ret = get_errno(sys_utimensat(arg1, path(p), ts, arg4));
+ ret = get_errno(sys_utimensat(arg1, path(p), tsp, arg4));
unlock_user(p, arg2, 0);
}
}
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-commits] [COMMIT ebc996f] linux-user: fix utimensat,
Anthony Liguori <=