Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Wrapper functions for 16bit uid back compatibility. All nicely tied | |
3 | * together in the faint hope we can take the out in five years time. | |
4 | */ | |
5 | ||
6 | #include <linux/mm.h> | |
7 | #include <linux/utsname.h> | |
8 | #include <linux/mman.h> | |
9 | #include <linux/smp_lock.h> | |
10 | #include <linux/notifier.h> | |
11 | #include <linux/reboot.h> | |
12 | #include <linux/prctl.h> | |
c59ede7b | 13 | #include <linux/capability.h> |
1da177e4 LT |
14 | #include <linux/init.h> |
15 | #include <linux/highuid.h> | |
16 | #include <linux/security.h> | |
17 | #include <linux/syscalls.h> | |
18 | ||
19 | #include <asm/uaccess.h> | |
20 | ||
21 | asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group) | |
22 | { | |
23 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
24 | } | |
25 | ||
26 | asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group) | |
27 | { | |
28 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
29 | } | |
30 | ||
31 | asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group) | |
32 | { | |
33 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
34 | } | |
35 | ||
36 | asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid) | |
37 | { | |
38 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
39 | } | |
40 | ||
41 | asmlinkage long sys_setgid16(old_gid_t gid) | |
42 | { | |
43 | return sys_setgid(low2highgid(gid)); | |
44 | } | |
45 | ||
46 | asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid) | |
47 | { | |
48 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
49 | } | |
50 | ||
51 | asmlinkage long sys_setuid16(old_uid_t uid) | |
52 | { | |
53 | return sys_setuid(low2highuid(uid)); | |
54 | } | |
55 | ||
56 | asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid) | |
57 | { | |
58 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
59 | low2highuid(suid)); | |
60 | } | |
61 | ||
62 | asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid) | |
63 | { | |
64 | int retval; | |
65 | ||
66 | if (!(retval = put_user(high2lowuid(current->uid), ruid)) && | |
67 | !(retval = put_user(high2lowuid(current->euid), euid))) | |
68 | retval = put_user(high2lowuid(current->suid), suid); | |
69 | ||
70 | return retval; | |
71 | } | |
72 | ||
73 | asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid) | |
74 | { | |
75 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
76 | low2highgid(sgid)); | |
77 | } | |
78 | ||
79 | asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid) | |
80 | { | |
81 | int retval; | |
82 | ||
83 | if (!(retval = put_user(high2lowgid(current->gid), rgid)) && | |
84 | !(retval = put_user(high2lowgid(current->egid), egid))) | |
85 | retval = put_user(high2lowgid(current->sgid), sgid); | |
86 | ||
87 | return retval; | |
88 | } | |
89 | ||
90 | asmlinkage long sys_setfsuid16(old_uid_t uid) | |
91 | { | |
92 | return sys_setfsuid(low2highuid(uid)); | |
93 | } | |
94 | ||
95 | asmlinkage long sys_setfsgid16(old_gid_t gid) | |
96 | { | |
97 | return sys_setfsgid(low2highgid(gid)); | |
98 | } | |
99 | ||
100 | static int groups16_to_user(old_gid_t __user *grouplist, | |
101 | struct group_info *group_info) | |
102 | { | |
103 | int i; | |
104 | old_gid_t group; | |
105 | ||
106 | for (i = 0; i < group_info->ngroups; i++) { | |
107 | group = high2lowgid(GROUP_AT(group_info, i)); | |
108 | if (put_user(group, grouplist+i)) | |
109 | return -EFAULT; | |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int groups16_from_user(struct group_info *group_info, | |
116 | old_gid_t __user *grouplist) | |
117 | { | |
118 | int i; | |
119 | old_gid_t group; | |
120 | ||
121 | for (i = 0; i < group_info->ngroups; i++) { | |
122 | if (get_user(group, grouplist+i)) | |
123 | return -EFAULT; | |
124 | GROUP_AT(group_info, i) = low2highgid(group); | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist) | |
131 | { | |
132 | int i = 0; | |
133 | ||
134 | if (gidsetsize < 0) | |
135 | return -EINVAL; | |
136 | ||
137 | get_group_info(current->group_info); | |
138 | i = current->group_info->ngroups; | |
139 | if (gidsetsize) { | |
140 | if (i > gidsetsize) { | |
141 | i = -EINVAL; | |
142 | goto out; | |
143 | } | |
144 | if (groups16_to_user(grouplist, current->group_info)) { | |
145 | i = -EFAULT; | |
146 | goto out; | |
147 | } | |
148 | } | |
149 | out: | |
150 | put_group_info(current->group_info); | |
151 | return i; | |
152 | } | |
153 | ||
154 | asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist) | |
155 | { | |
156 | struct group_info *group_info; | |
157 | int retval; | |
158 | ||
159 | if (!capable(CAP_SETGID)) | |
160 | return -EPERM; | |
161 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
162 | return -EINVAL; | |
163 | ||
164 | group_info = groups_alloc(gidsetsize); | |
165 | if (!group_info) | |
166 | return -ENOMEM; | |
167 | retval = groups16_from_user(group_info, grouplist); | |
168 | if (retval) { | |
169 | put_group_info(group_info); | |
170 | return retval; | |
171 | } | |
172 | ||
173 | retval = set_current_groups(group_info); | |
174 | put_group_info(group_info); | |
175 | ||
176 | return retval; | |
177 | } | |
178 | ||
179 | asmlinkage long sys_getuid16(void) | |
180 | { | |
181 | return high2lowuid(current->uid); | |
182 | } | |
183 | ||
184 | asmlinkage long sys_geteuid16(void) | |
185 | { | |
186 | return high2lowuid(current->euid); | |
187 | } | |
188 | ||
189 | asmlinkage long sys_getgid16(void) | |
190 | { | |
191 | return high2lowgid(current->gid); | |
192 | } | |
193 | ||
194 | asmlinkage long sys_getegid16(void) | |
195 | { | |
196 | return high2lowgid(current->egid); | |
197 | } |