Viewing file:  uid16.c (3.98 KB) -rw-r--r--
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/*
* 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);
}
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