summaryrefslogtreecommitdiff
path: root/kernel/uid16.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /kernel/uid16.c
downloadlinux-sh-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'kernel/uid16.c')
-rw-r--r--kernel/uid16.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/kernel/uid16.c b/kernel/uid16.c
new file mode 100644
index 000000000000..f669941e8b26
--- /dev/null
+++ b/kernel/uid16.c
@@ -0,0 +1,196 @@
+/*
+ * Wrapper functions for 16bit uid back compatibility. All nicely tied
+ * together in the faint hope we can take the out in five years time.
+ */
+
+#include <linux/mm.h>
+#include <linux/utsname.h>
+#include <linux/mman.h>
+#include <linux/smp_lock.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/prctl.h>
+#include <linux/init.h>
+#include <linux/highuid.h>
+#include <linux/security.h>
+#include <linux/syscalls.h>
+
+#include <asm/uaccess.h>
+
+asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group)
+{
+ return sys_chown(filename, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group)
+{
+ return sys_lchown(filename, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group)
+{
+ return sys_fchown(fd, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid)
+{
+ return sys_setregid(low2highgid(rgid), low2highgid(egid));
+}
+
+asmlinkage long sys_setgid16(old_gid_t gid)
+{
+ return sys_setgid(low2highgid(gid));
+}
+
+asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid)
+{
+ return sys_setreuid(low2highuid(ruid), low2highuid(euid));
+}
+
+asmlinkage long sys_setuid16(old_uid_t uid)
+{
+ return sys_setuid(low2highuid(uid));
+}
+
+asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
+{
+ return sys_setresuid(low2highuid(ruid), low2highuid(euid),
+ low2highuid(suid));
+}
+
+asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid)
+{
+ int retval;
+
+ if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
+ !(retval = put_user(high2lowuid(current->euid), euid)))
+ retval = put_user(high2lowuid(current->suid), suid);
+
+ return retval;
+}
+
+asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid)
+{
+ return sys_setresgid(low2highgid(rgid), low2highgid(egid),
+ low2highgid(sgid));
+}
+
+asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid)
+{
+ int retval;
+
+ if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
+ !(retval = put_user(high2lowgid(current->egid), egid)))
+ retval = put_user(high2lowgid(current->sgid), sgid);
+
+ return retval;
+}
+
+asmlinkage long sys_setfsuid16(old_uid_t uid)
+{
+ return sys_setfsuid(low2highuid(uid));
+}
+
+asmlinkage long sys_setfsgid16(old_gid_t gid)
+{
+ return sys_setfsgid(low2highgid(gid));
+}
+
+static int groups16_to_user(old_gid_t __user *grouplist,
+ struct group_info *group_info)
+{
+ int i;
+ old_gid_t group;
+
+ for (i = 0; i < group_info->ngroups; i++) {
+ group = high2lowgid(GROUP_AT(group_info, i));
+ if (put_user(group, grouplist+i))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int groups16_from_user(struct group_info *group_info,
+ old_gid_t __user *grouplist)
+{
+ int i;
+ old_gid_t group;
+
+ for (i = 0; i < group_info->ngroups; i++) {
+ if (get_user(group, grouplist+i))
+ return -EFAULT;
+ GROUP_AT(group_info, i) = low2highgid(group);
+ }
+
+ return 0;
+}
+
+asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist)
+{
+ int i = 0;
+
+ if (gidsetsize < 0)
+ return -EINVAL;
+
+ get_group_info(current->group_info);
+ i = current->group_info->ngroups;
+ if (gidsetsize) {
+ if (i > gidsetsize) {
+ i = -EINVAL;
+ goto out;
+ }
+ if (groups16_to_user(grouplist, current->group_info)) {
+ i = -EFAULT;
+ goto out;
+ }
+ }
+out:
+ put_group_info(current->group_info);
+ return i;
+}
+
+asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist)
+{
+ struct group_info *group_info;
+ int retval;
+
+ if (!capable(CAP_SETGID))
+ return -EPERM;
+ if ((unsigned)gidsetsize > NGROUPS_MAX)
+ return -EINVAL;
+
+ group_info = groups_alloc(gidsetsize);
+ if (!group_info)
+ return -ENOMEM;
+ retval = groups16_from_user(group_info, grouplist);
+ if (retval) {
+ put_group_info(group_info);
+ return retval;
+ }
+
+ retval = set_current_groups(group_info);
+ put_group_info(group_info);
+
+ return retval;
+}
+
+asmlinkage long sys_getuid16(void)
+{
+ return high2lowuid(current->uid);
+}
+
+asmlinkage long sys_geteuid16(void)
+{
+ return high2lowuid(current->euid);
+}
+
+asmlinkage long sys_getgid16(void)
+{
+ return high2lowgid(current->gid);
+}
+
+asmlinkage long sys_getegid16(void)
+{
+ return high2lowgid(current->egid);
+}