Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v2.6.17-rc2
Fetching contributors…

Cannot retrieve contributors at this time

file 197 lines (160 sloc) 4.379 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197
/*
* 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/capability.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);
}
Something went wrong with that request. Please try again.