patch-2.3.39 linux/kernel/uid16.c

• Lines: 164
• Date: Mon Jan 10 18:40:26 2000
• Orig file: v2.3.38/linux/kernel/uid16.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.38/linux/kernel/uid16.c linux/kernel/uid16.c
@@ -0,0 +1,163 @@
+/*
+ *	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 <asm/uaccess.h>
+
+extern asmlinkage long sys_chown(const char *, uid_t,gid_t);
+extern asmlinkage long sys_lchown(const char *, uid_t,gid_t);
+extern asmlinkage long sys_fchown(unsigned int, uid_t,gid_t);
+extern asmlinkage long sys_setregid(gid_t, gid_t);
+extern asmlinkage long sys_setgid(gid_t);
+extern asmlinkage long sys_setreuid(uid_t, uid_t);
+extern asmlinkage long sys_setuid(uid_t);
+extern asmlinkage long sys_setresuid(uid_t, uid_t, uid_t);
+extern asmlinkage long sys_setresgid(gid_t, gid_t, gid_t);
+extern asmlinkage long sys_setfsuid(uid_t);
+extern asmlinkage long sys_setfsgid(gid_t);
+ 
+asmlinkage long sys_chown16(const char * filename, old_uid_t user, old_gid_t group)
+{
+	return sys_chown(filename, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys_lchown16(const char * 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((gid_t)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((uid_t)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 *ruid, old_uid_t *euid, old_uid_t *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 *rgid, old_gid_t *egid, old_gid_t *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((uid_t)uid);
+}
+
+asmlinkage long sys_setfsgid16(old_gid_t gid)
+{
+	return sys_setfsgid((gid_t)gid);
+}
+
+asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t *grouplist)
+{
+	old_gid_t groups[NGROUPS];
+	int i,j;
+
+	if (gidsetsize < 0)
+		return -EINVAL;
+	i = current->ngroups;
+	if (gidsetsize) {
+		if (i > gidsetsize)
+			return -EINVAL;
+		for(j=0;j<i;j++)
+			groups[j] = current->groups[j];
+		if (copy_to_user(grouplist, groups, sizeof(old_gid_t)*i))
+			return -EFAULT;
+	}
+	return i;
+}
+
+asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t *grouplist)
+{
+	old_gid_t groups[NGROUPS];
+	int i;
+
+	if (!capable(CAP_SETGID))
+		return -EPERM;
+	if ((unsigned) gidsetsize > NGROUPS)
+		return -EINVAL;
+	if (copy_from_user(groups, grouplist, gidsetsize * sizeof(old_gid_t)))
+		return -EFAULT;
+	for (i = 0 ; i < gidsetsize ; i++)
+		current->groups[i] = (gid_t)groups[i];
+	current->ngroups = gidsetsize;
+	return 0;
+}
+
+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);
+}