Commit | Line | Data |
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4147b3f6 | 1 | /* kern_prot.c 5.3 82/07/24 */ |
a05af100 BJ |
2 | |
3 | /* | |
4147b3f6 | 4 | * System calls related to processes and protection |
a05af100 BJ |
5 | */ |
6 | ||
4147b3f6 BJ |
7 | /* NEED ALLOCATION AND PROTECTION MECHANISM FOR PROCESS GROUPS */ |
8 | ||
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9 | #include "../h/param.h" |
10 | #include "../h/systm.h" | |
11 | #include "../h/dir.h" | |
12 | #include "../h/user.h" | |
13 | #include "../h/reg.h" | |
14 | #include "../h/inode.h" | |
15 | #include "../h/proc.h" | |
16 | #include "../h/clock.h" | |
17 | #include "../h/mtpr.h" | |
18 | #include "../h/timeb.h" | |
19 | #include "../h/times.h" | |
20 | #include "../h/reboot.h" | |
21 | #include "../h/fs.h" | |
22 | #include "../h/conf.h" | |
23 | #include "../h/buf.h" | |
24 | #include "../h/mount.h" | |
57e12479 | 25 | #include "../h/quota.h" |
a05af100 | 26 | |
4147b3f6 BJ |
27 | getpid() |
28 | { | |
29 | ||
30 | u.u_r.r_val1 = u.u_procp->p_pid; | |
31 | u.u_r.r_val2 = u.u_procp->p_ppid; | |
32 | } | |
33 | ||
34 | getpgrp() | |
35 | { | |
36 | register struct a { | |
37 | int pid; | |
38 | } *uap = (struct a *)u.u_ap; | |
39 | register struct proc *p; | |
40 | ||
41 | if (uap->pid == 0) | |
42 | uap->pid = u.u_procp->p_pid; | |
43 | p = pfind(uap->pid); | |
44 | if (p == 0) { | |
45 | u.u_error = ESRCH; | |
46 | return; | |
47 | } | |
48 | u.u_r.r_val1 = p->p_pgrp; | |
49 | } | |
50 | ||
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51 | getuid() |
52 | { | |
53 | ||
54 | u.u_r.r_val1 = u.u_ruid; | |
55 | u.u_r.r_val2 = u.u_uid; | |
56 | } | |
57 | ||
4147b3f6 BJ |
58 | getgid() |
59 | { | |
60 | ||
61 | u.u_r.r_val1 = u.u_rgid; | |
62 | u.u_r.r_val2 = u.u_gid; | |
63 | } | |
64 | ||
65 | getgrp() | |
66 | { | |
67 | register struct a { | |
68 | int *gidset; | |
69 | } *uap = (struct a *)u.u_ap; | |
70 | ||
71 | if (copyout((caddr_t)u.u_grps, (caddr_t)uap->gidset, | |
72 | sizeof (u.u_grps))) { | |
73 | u.u_error = EFAULT; | |
74 | return; | |
75 | } | |
76 | } | |
77 | ||
78 | setpgrp() | |
79 | { | |
80 | register struct proc *p; | |
81 | register struct a { | |
82 | int pid; | |
83 | int pgrp; | |
84 | } *uap = (struct a *)u.u_ap; | |
85 | ||
86 | if (uap->pid == 0) | |
87 | uap->pid = u.u_procp->p_pid; | |
88 | p = pfind(uap->pid); | |
89 | if (p == 0) { | |
90 | u.u_error = ESRCH; | |
91 | return; | |
92 | } | |
93 | if (p->p_uid != u.u_uid && u.u_uid && !inferior(p)) { | |
94 | u.u_error = EPERM; | |
95 | return; | |
96 | } | |
97 | p->p_pgrp = uap->pgrp; | |
98 | } | |
99 | ||
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100 | setuid() |
101 | { | |
102 | register uid; | |
103 | register struct a { | |
104 | int uid; | |
105 | } *uap; | |
106 | ||
107 | uap = (struct a *)u.u_ap; | |
108 | uid = uap->uid; | |
109 | if (u.u_ruid == uid || u.u_uid == uid || suser()) { | |
57e12479 RE |
110 | #ifdef QUOTA |
111 | if (u.u_quota->q_uid != uid) { | |
112 | qclean(); | |
113 | qstart(getquota(uid, 0, 0)); | |
114 | } | |
115 | #endif | |
a05af100 BJ |
116 | u.u_uid = uid; |
117 | u.u_procp->p_uid = uid; | |
118 | u.u_ruid = uid; | |
119 | } | |
120 | } | |
121 | ||
a05af100 BJ |
122 | setgid() |
123 | { | |
124 | register gid; | |
125 | register struct a { | |
126 | int gid; | |
127 | } *uap; | |
128 | ||
129 | uap = (struct a *)u.u_ap; | |
130 | gid = uap->gid; | |
131 | if (u.u_rgid == gid || u.u_gid == gid || suser()) { | |
132 | u.u_gid = gid; | |
133 | u.u_rgid = gid; | |
134 | } | |
135 | } | |
4147b3f6 BJ |
136 | |
137 | setgrp() | |
138 | { | |
139 | register struct a { | |
140 | int *gidset; | |
141 | } *uap = (struct a *)u.u_ap; | |
142 | ||
143 | if (suser()) | |
144 | return; | |
145 | if (copyin((caddr_t)uap->gidset, (caddr_t)u.u_grps, | |
146 | sizeof (u.u_grps))) { | |
147 | u.u_error = EFAULT; | |
148 | return; | |
149 | } | |
150 | } | |
151 | ||
152 | /* BEGIN DEFUNCT */ | |
153 | osetgrp() | |
154 | { | |
155 | register struct a { | |
156 | int *ngrps; | |
157 | int *ogrps; | |
158 | } *uap = (struct a *)u.u_ap; | |
159 | int thegroups[NGRPS/(sizeof(int)*8)]; | |
160 | ||
161 | if (uap->ogrps && copyout((caddr_t)u.u_grps, (caddr_t)uap->ogrps, | |
162 | sizeof (thegroups))) { | |
163 | u.u_error = EFAULT; | |
164 | return; | |
165 | } | |
166 | if (uap->ngrps == 0) | |
167 | return; | |
168 | if (copyin((caddr_t)uap->ngrps, (caddr_t)thegroups, | |
169 | sizeof (thegroups))) { | |
170 | u.u_error = EFAULT; | |
171 | return; | |
172 | } | |
173 | if (suser()) | |
174 | bcopy((caddr_t)thegroups, (caddr_t)u.u_grps, sizeof (u.u_grps)); | |
175 | } | |
176 | ||
177 | /* | |
178 | * Pid of zero implies current process. | |
179 | * Pgrp -1 is getpgrp system call returning | |
180 | * current process group. | |
181 | */ | |
182 | osetpgrp() | |
183 | { | |
184 | register struct proc *p; | |
185 | register struct a { | |
186 | int pid; | |
187 | int pgrp; | |
188 | } *uap; | |
189 | ||
190 | uap = (struct a *)u.u_ap; | |
191 | if (uap->pid == 0) | |
192 | p = u.u_procp; | |
193 | else { | |
194 | p = pfind(uap->pid); | |
195 | if (p == 0) { | |
196 | u.u_error = ESRCH; | |
197 | return; | |
198 | } | |
199 | } | |
200 | if (uap->pgrp <= 0) { | |
201 | u.u_r.r_val1 = p->p_pgrp; | |
202 | return; | |
203 | } | |
204 | if (p->p_uid != u.u_uid && u.u_uid && !inferior(p)) { | |
205 | u.u_error = EPERM; | |
206 | return; | |
207 | } | |
208 | p->p_pgrp = uap->pgrp; | |
209 | } | |
210 | /* END DEFUNCT */ |