Commit | Line | Data |
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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1989, 1990, 1991 Regents of the University | |
3 | * of California. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
600f7f07 | 33 | * from: @(#)kern_prot.c 7.21 (Berkeley) 5/3/91 |
fde1aeb2 | 34 | * $Id: kern_prot.c,v 1.4 1993/11/25 01:33:04 wollman Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
37 | /* | |
38 | * System calls related to processes and protection | |
39 | */ | |
40 | ||
41 | #include "param.h" | |
15637ed4 | 42 | #include "systm.h" |
fde1aeb2 | 43 | #include "acct.h" |
15637ed4 RG |
44 | #include "ucred.h" |
45 | #include "proc.h" | |
46 | #include "timeb.h" | |
47 | #include "times.h" | |
48 | #include "malloc.h" | |
49 | ||
50 | /* ARGSUSED */ | |
4c45483e | 51 | int |
15637ed4 RG |
52 | getpid(p, uap, retval) |
53 | struct proc *p; | |
54 | void *uap; | |
55 | int *retval; | |
56 | { | |
57 | ||
58 | *retval = p->p_pid; | |
59 | #ifdef COMPAT_43 | |
60 | retval[1] = p->p_pptr->p_pid; | |
61 | #endif | |
62 | return (0); | |
63 | } | |
64 | ||
65 | /* ARGSUSED */ | |
4c45483e | 66 | int |
15637ed4 RG |
67 | getppid(p, uap, retval) |
68 | struct proc *p; | |
69 | void *uap; | |
70 | int *retval; | |
71 | { | |
72 | ||
73 | *retval = p->p_pptr->p_pid; | |
74 | return (0); | |
75 | } | |
76 | ||
77 | /* Get process group ID; note that POSIX getpgrp takes no parameter */ | |
4c45483e | 78 | int |
15637ed4 RG |
79 | getpgrp(p, uap, retval) |
80 | struct proc *p; | |
81 | void *uap; | |
82 | int *retval; | |
83 | { | |
84 | ||
85 | *retval = p->p_pgrp->pg_id; | |
86 | return (0); | |
87 | } | |
88 | ||
89 | /* ARGSUSED */ | |
4c45483e | 90 | int |
15637ed4 RG |
91 | getuid(p, uap, retval) |
92 | struct proc *p; | |
93 | void *uap; | |
94 | int *retval; | |
95 | { | |
96 | ||
97 | *retval = p->p_cred->p_ruid; | |
98 | #ifdef COMPAT_43 | |
99 | retval[1] = p->p_ucred->cr_uid; | |
100 | #endif | |
101 | return (0); | |
102 | } | |
103 | ||
104 | /* ARGSUSED */ | |
4c45483e | 105 | int |
15637ed4 RG |
106 | geteuid(p, uap, retval) |
107 | struct proc *p; | |
108 | void *uap; | |
109 | int *retval; | |
110 | { | |
111 | ||
112 | *retval = p->p_ucred->cr_uid; | |
113 | return (0); | |
114 | } | |
115 | ||
116 | /* ARGSUSED */ | |
4c45483e | 117 | int |
15637ed4 RG |
118 | getgid(p, uap, retval) |
119 | struct proc *p; | |
120 | void *uap; | |
121 | int *retval; | |
122 | { | |
123 | ||
124 | *retval = p->p_cred->p_rgid; | |
125 | #ifdef COMPAT_43 | |
126 | retval[1] = p->p_ucred->cr_groups[0]; | |
127 | #endif | |
128 | return (0); | |
129 | } | |
130 | ||
131 | /* | |
132 | * Get effective group ID. The "egid" is groups[0], and could be obtained | |
133 | * via getgroups. This syscall exists because it is somewhat painful to do | |
134 | * correctly in a library function. | |
135 | */ | |
136 | /* ARGSUSED */ | |
4c45483e | 137 | int |
15637ed4 RG |
138 | getegid(p, uap, retval) |
139 | struct proc *p; | |
140 | void *uap; | |
141 | int *retval; | |
142 | { | |
143 | ||
144 | *retval = p->p_ucred->cr_groups[0]; | |
145 | return (0); | |
146 | } | |
147 | ||
3c7eb27c DG |
148 | struct getgroups_args { |
149 | u_int gidsetsize; | |
150 | int *gidset; /* XXX not yet POSIX */ | |
151 | }; | |
152 | ||
4c45483e | 153 | int |
15637ed4 RG |
154 | getgroups(p, uap, retval) |
155 | struct proc *p; | |
3c7eb27c | 156 | register struct getgroups_args *uap; |
15637ed4 RG |
157 | int *retval; |
158 | { | |
159 | register struct pcred *pc = p->p_cred; | |
160 | register gid_t *gp; | |
161 | register int *lp; | |
162 | register u_int ngrp; | |
163 | int groups[NGROUPS]; | |
164 | int error; | |
165 | ||
166 | if ((ngrp = uap->gidsetsize) == 0) { | |
167 | *retval = pc->pc_ucred->cr_ngroups; | |
168 | return (0); | |
169 | } | |
170 | if (ngrp < pc->pc_ucred->cr_ngroups) | |
171 | return (EINVAL); | |
172 | ngrp = pc->pc_ucred->cr_ngroups; | |
173 | for (gp = pc->pc_ucred->cr_groups, lp = groups; lp < &groups[ngrp]; ) | |
174 | *lp++ = *gp++; | |
175 | if (error = copyout((caddr_t)groups, (caddr_t)uap->gidset, | |
176 | ngrp * sizeof (groups[0]))) | |
177 | return (error); | |
178 | *retval = ngrp; | |
179 | return (0); | |
180 | } | |
181 | ||
182 | /* ARGSUSED */ | |
4c45483e | 183 | int |
15637ed4 RG |
184 | setsid(p, uap, retval) |
185 | register struct proc *p; | |
186 | void *uap; | |
187 | int *retval; | |
188 | { | |
189 | ||
190 | if (p->p_pgid == p->p_pid || pgfind(p->p_pid)) { | |
191 | return (EPERM); | |
192 | } else { | |
193 | enterpgrp(p, p->p_pid, 1); | |
194 | *retval = p->p_pid; | |
195 | return (0); | |
196 | } | |
197 | } | |
198 | ||
199 | /* | |
200 | * set process group (setpgid/old setpgrp) | |
201 | * | |
202 | * caller does setpgid(targpid, targpgid) | |
203 | * | |
204 | * pid must be caller or child of caller (ESRCH) | |
205 | * if a child | |
206 | * pid must be in same session (EPERM) | |
207 | * pid can't have done an exec (EACCES) | |
208 | * if pgid != pid | |
209 | * there must exist some pid in same session having pgid (EPERM) | |
210 | * pid must not be session leader (EPERM) | |
211 | */ | |
3c7eb27c DG |
212 | |
213 | struct setpgid_args { | |
214 | int pid; /* target process id */ | |
215 | int pgid; /* target pgrp id */ | |
216 | }; | |
217 | ||
15637ed4 | 218 | /* ARGSUSED */ |
4c45483e | 219 | int |
15637ed4 RG |
220 | setpgid(curp, uap, retval) |
221 | struct proc *curp; | |
3c7eb27c | 222 | register struct setpgid_args *uap; |
15637ed4 RG |
223 | int *retval; |
224 | { | |
225 | register struct proc *targp; /* target process */ | |
226 | register struct pgrp *pgrp; /* target pgrp */ | |
227 | ||
228 | if (uap->pid != 0 && uap->pid != curp->p_pid) { | |
229 | if ((targp = pfind(uap->pid)) == 0 || !inferior(targp)) | |
230 | return (ESRCH); | |
231 | if (targp->p_session != curp->p_session) | |
232 | return (EPERM); | |
233 | if (targp->p_flag&SEXEC) | |
234 | return (EACCES); | |
235 | } else | |
236 | targp = curp; | |
237 | if (SESS_LEADER(targp)) | |
238 | return (EPERM); | |
239 | if (uap->pgid == 0) | |
240 | uap->pgid = targp->p_pid; | |
241 | else if (uap->pgid != targp->p_pid) | |
242 | if ((pgrp = pgfind(uap->pgid)) == 0 || | |
243 | pgrp->pg_session != curp->p_session) | |
244 | return (EPERM); | |
245 | enterpgrp(targp, uap->pgid, 0); | |
246 | return (0); | |
247 | } | |
248 | ||
3c7eb27c DG |
249 | struct setuid_args { |
250 | int uid; | |
251 | }; | |
252 | ||
15637ed4 | 253 | /* ARGSUSED */ |
4c45483e | 254 | int |
15637ed4 RG |
255 | setuid(p, uap, retval) |
256 | struct proc *p; | |
3c7eb27c | 257 | struct setuid_args *uap; |
15637ed4 RG |
258 | int *retval; |
259 | { | |
260 | register struct pcred *pc = p->p_cred; | |
261 | register uid_t uid; | |
262 | int error; | |
263 | ||
264 | uid = uap->uid; | |
265 | if (uid != pc->p_ruid && | |
266 | (error = suser(pc->pc_ucred, &p->p_acflag))) | |
267 | return (error); | |
268 | /* | |
269 | * Everything's okay, do it. Copy credentials so other references do | |
270 | * not see our changes. | |
271 | */ | |
272 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
273 | pc->pc_ucred->cr_uid = uid; | |
274 | pc->p_ruid = uid; | |
275 | pc->p_svuid = uid; | |
276 | return (0); | |
277 | } | |
278 | ||
3c7eb27c DG |
279 | struct seteuid_args { |
280 | int euid; | |
281 | }; | |
282 | ||
15637ed4 | 283 | /* ARGSUSED */ |
4c45483e | 284 | int |
15637ed4 RG |
285 | seteuid(p, uap, retval) |
286 | struct proc *p; | |
3c7eb27c | 287 | struct seteuid_args *uap; |
15637ed4 RG |
288 | int *retval; |
289 | { | |
290 | register struct pcred *pc = p->p_cred; | |
291 | register uid_t euid; | |
292 | int error; | |
293 | ||
294 | euid = uap->euid; | |
295 | if (euid != pc->p_ruid && euid != pc->p_svuid && | |
296 | (error = suser(pc->pc_ucred, &p->p_acflag))) | |
297 | return (error); | |
298 | /* | |
299 | * Everything's okay, do it. Copy credentials so other references do | |
300 | * not see our changes. | |
301 | */ | |
302 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
303 | pc->pc_ucred->cr_uid = euid; | |
304 | return (0); | |
305 | } | |
306 | ||
3c7eb27c DG |
307 | struct setgid_args { |
308 | int gid; | |
309 | }; | |
310 | ||
15637ed4 | 311 | /* ARGSUSED */ |
4c45483e | 312 | int |
15637ed4 RG |
313 | setgid(p, uap, retval) |
314 | struct proc *p; | |
3c7eb27c | 315 | struct setgid_args *uap; |
15637ed4 RG |
316 | int *retval; |
317 | { | |
318 | register struct pcred *pc = p->p_cred; | |
319 | register gid_t gid; | |
320 | int error; | |
321 | ||
322 | gid = uap->gid; | |
323 | if (gid != pc->p_rgid && (error = suser(pc->pc_ucred, &p->p_acflag))) | |
324 | return (error); | |
325 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
326 | pc->pc_ucred->cr_groups[0] = gid; | |
327 | pc->p_rgid = gid; | |
328 | pc->p_svgid = gid; /* ??? */ | |
329 | return (0); | |
330 | } | |
331 | ||
3c7eb27c DG |
332 | struct setegid_args { |
333 | int egid; | |
334 | }; | |
335 | ||
15637ed4 | 336 | /* ARGSUSED */ |
4c45483e | 337 | int |
15637ed4 RG |
338 | setegid(p, uap, retval) |
339 | struct proc *p; | |
3c7eb27c | 340 | struct setegid_args *uap; |
15637ed4 RG |
341 | int *retval; |
342 | { | |
343 | register struct pcred *pc = p->p_cred; | |
344 | register gid_t egid; | |
345 | int error; | |
346 | ||
347 | egid = uap->egid; | |
348 | if (egid != pc->p_rgid && egid != pc->p_svgid && | |
349 | (error = suser(pc->pc_ucred, &p->p_acflag))) | |
350 | return (error); | |
351 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
352 | pc->pc_ucred->cr_groups[0] = egid; | |
353 | return (0); | |
354 | } | |
355 | ||
356 | #ifdef COMPAT_43 | |
3c7eb27c DG |
357 | |
358 | struct osetreuid_args { | |
359 | int ruid; | |
360 | int euid; | |
361 | }; | |
362 | ||
15637ed4 | 363 | /* ARGSUSED */ |
4c45483e | 364 | int |
15637ed4 RG |
365 | osetreuid(p, uap, retval) |
366 | register struct proc *p; | |
3c7eb27c | 367 | struct osetreuid_args *uap; |
15637ed4 RG |
368 | int *retval; |
369 | { | |
370 | register struct pcred *pc = p->p_cred; | |
371 | register uid_t ruid, euid; | |
372 | int error; | |
373 | ||
374 | if (uap->ruid == -1) | |
375 | ruid = pc->p_ruid; | |
376 | else | |
377 | ruid = uap->ruid; | |
378 | /* | |
379 | * Allow setting real uid to previous effective, for swapping real and | |
380 | * effective. This should be: | |
381 | * | |
382 | * if (ruid != pc->p_ruid && | |
383 | * (error = suser(pc->pc_ucred, &p->p_acflag))) | |
384 | */ | |
385 | if (ruid != pc->p_ruid && ruid != pc->pc_ucred->cr_uid /* XXX */ && | |
386 | (error = suser(pc->pc_ucred, &p->p_acflag))) | |
387 | return (error); | |
388 | if (uap->euid == -1) | |
389 | euid = pc->pc_ucred->cr_uid; | |
390 | else | |
391 | euid = uap->euid; | |
392 | if (euid != pc->pc_ucred->cr_uid && euid != pc->p_ruid && | |
393 | euid != pc->p_svuid && (error = suser(pc->pc_ucred, &p->p_acflag))) | |
394 | return (error); | |
395 | /* | |
396 | * Everything's okay, do it. Copy credentials so other references do | |
397 | * not see our changes. | |
398 | */ | |
399 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
400 | pc->pc_ucred->cr_uid = euid; | |
401 | pc->p_ruid = ruid; | |
402 | return (0); | |
403 | } | |
404 | ||
3c7eb27c DG |
405 | struct osetregid_args { |
406 | int rgid; | |
407 | int egid; | |
408 | }; | |
409 | ||
15637ed4 | 410 | /* ARGSUSED */ |
4c45483e | 411 | int |
15637ed4 RG |
412 | osetregid(p, uap, retval) |
413 | register struct proc *p; | |
3c7eb27c | 414 | struct osetregid_args *uap; |
15637ed4 RG |
415 | int *retval; |
416 | { | |
417 | register struct pcred *pc = p->p_cred; | |
418 | register gid_t rgid, egid; | |
419 | int error; | |
420 | ||
421 | if (uap->rgid == -1) | |
422 | rgid = pc->p_rgid; | |
423 | else | |
424 | rgid = uap->rgid; | |
425 | /* | |
426 | * Allow setting real gid to previous effective, for swapping real and | |
427 | * effective. This didn't really work correctly in 4.[23], but is | |
428 | * preserved so old stuff doesn't fail. This should be: | |
429 | * | |
430 | * if (rgid != pc->p_rgid && | |
431 | * (error = suser(pc->pc_ucred, &p->p_acflag))) | |
432 | */ | |
433 | if (rgid != pc->p_rgid && rgid != pc->pc_ucred->cr_groups[0] /* XXX */ && | |
434 | (error = suser(pc->pc_ucred, &p->p_acflag))) | |
435 | return (error); | |
436 | if (uap->egid == -1) | |
437 | egid = pc->pc_ucred->cr_groups[0]; | |
438 | else | |
439 | egid = uap->egid; | |
440 | if (egid != pc->pc_ucred->cr_groups[0] && egid != pc->p_rgid && | |
441 | egid != pc->p_svgid && (error = suser(pc->pc_ucred, &p->p_acflag))) | |
442 | return (error); | |
443 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
444 | pc->pc_ucred->cr_groups[0] = egid; | |
445 | pc->p_rgid = rgid; | |
446 | return (0); | |
447 | } | |
448 | #endif | |
449 | ||
3c7eb27c DG |
450 | struct setgroups_args { |
451 | u_int gidsetsize; | |
452 | int *gidset; | |
453 | }; | |
454 | ||
15637ed4 | 455 | /* ARGSUSED */ |
4c45483e | 456 | int |
15637ed4 RG |
457 | setgroups(p, uap, retval) |
458 | struct proc *p; | |
3c7eb27c | 459 | struct setgroups_args *uap; |
15637ed4 RG |
460 | int *retval; |
461 | { | |
462 | register struct pcred *pc = p->p_cred; | |
463 | register gid_t *gp; | |
464 | register u_int ngrp; | |
465 | register int *lp; | |
466 | int error, groups[NGROUPS]; | |
467 | ||
468 | if (error = suser(pc->pc_ucred, &p->p_acflag)) | |
469 | return (error); | |
470 | if ((ngrp = uap->gidsetsize) > NGROUPS) | |
471 | return (EINVAL); | |
472 | if (error = copyin((caddr_t)uap->gidset, (caddr_t)groups, | |
473 | ngrp * sizeof (groups[0]))) | |
474 | return (error); | |
475 | pc->pc_ucred = crcopy(pc->pc_ucred); | |
476 | pc->pc_ucred->cr_ngroups = ngrp; | |
477 | /* convert from int's to gid_t's */ | |
478 | for (gp = pc->pc_ucred->cr_groups, lp = groups; ngrp--; ) | |
479 | *gp++ = *lp++; | |
480 | return (0); | |
481 | } | |
482 | ||
483 | /* | |
484 | * Check if gid is a member of the group set. | |
485 | */ | |
4c45483e | 486 | int |
15637ed4 RG |
487 | groupmember(gid, cred) |
488 | gid_t gid; | |
489 | register struct ucred *cred; | |
490 | { | |
491 | register gid_t *gp; | |
492 | gid_t *egp; | |
493 | ||
494 | egp = &(cred->cr_groups[cred->cr_ngroups]); | |
495 | for (gp = cred->cr_groups; gp < egp; gp++) | |
496 | if (*gp == gid) | |
497 | return (1); | |
498 | return (0); | |
499 | } | |
500 | ||
501 | /* | |
502 | * Test whether the specified credentials imply "super-user" | |
503 | * privilege; if so, and we have accounting info, set the flag | |
504 | * indicating use of super-powers. | |
505 | * Returns 0 or error. | |
506 | */ | |
4c45483e | 507 | int |
15637ed4 RG |
508 | suser(cred, acflag) |
509 | struct ucred *cred; | |
510 | u_short *acflag; | |
511 | { | |
512 | if (cred->cr_uid == 0) { | |
513 | if (acflag) | |
514 | *acflag |= ASU; | |
515 | return (0); | |
516 | } | |
517 | return (EPERM); | |
518 | } | |
519 | ||
520 | /* | |
521 | * Allocate a zeroed cred structure. | |
522 | */ | |
523 | struct ucred * | |
524 | crget() | |
525 | { | |
526 | register struct ucred *cr; | |
527 | ||
528 | MALLOC(cr, struct ucred *, sizeof(*cr), M_CRED, M_WAITOK); | |
529 | bzero((caddr_t)cr, sizeof(*cr)); | |
530 | cr->cr_ref = 1; | |
531 | return (cr); | |
532 | } | |
533 | ||
534 | /* | |
535 | * Free a cred structure. | |
536 | * Throws away space when ref count gets to 0. | |
537 | */ | |
4c45483e | 538 | void |
15637ed4 RG |
539 | crfree(cr) |
540 | struct ucred *cr; | |
541 | { | |
4c45483e | 542 | int s = splimp(); /* ??? XXX FIXME */ |
15637ed4 RG |
543 | |
544 | if (--cr->cr_ref != 0) { | |
545 | (void) splx(s); | |
546 | return; | |
547 | } | |
548 | FREE((caddr_t)cr, M_CRED); | |
549 | (void) splx(s); | |
550 | } | |
551 | ||
552 | /* | |
553 | * Copy cred structure to a new one and free the old one. | |
554 | */ | |
555 | struct ucred * | |
556 | crcopy(cr) | |
557 | struct ucred *cr; | |
558 | { | |
559 | struct ucred *newcr; | |
560 | ||
561 | if (cr->cr_ref == 1) | |
562 | return (cr); | |
563 | newcr = crget(); | |
564 | *newcr = *cr; | |
565 | crfree(cr); | |
566 | newcr->cr_ref = 1; | |
567 | return (newcr); | |
568 | } | |
569 | ||
570 | /* | |
571 | * Dup cred struct to a new held one. | |
572 | */ | |
573 | struct ucred * | |
574 | crdup(cr) | |
575 | struct ucred *cr; | |
576 | { | |
577 | struct ucred *newcr; | |
578 | ||
579 | newcr = crget(); | |
580 | *newcr = *cr; | |
581 | newcr->cr_ref = 1; | |
582 | return (newcr); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Get login name, if available. | |
587 | */ | |
3c7eb27c DG |
588 | |
589 | struct getlogin_args { | |
590 | char *namebuf; | |
591 | u_int namelen; | |
592 | }; | |
593 | ||
15637ed4 | 594 | /* ARGSUSED */ |
4c45483e | 595 | int |
15637ed4 RG |
596 | getlogin(p, uap, retval) |
597 | struct proc *p; | |
3c7eb27c | 598 | struct getlogin_args *uap; |
15637ed4 RG |
599 | int *retval; |
600 | { | |
601 | ||
602 | if (uap->namelen > sizeof (p->p_pgrp->pg_session->s_login)) | |
603 | uap->namelen = sizeof (p->p_pgrp->pg_session->s_login); | |
604 | return (copyout((caddr_t) p->p_pgrp->pg_session->s_login, | |
605 | (caddr_t) uap->namebuf, uap->namelen)); | |
606 | } | |
607 | ||
608 | /* | |
609 | * Set login name. | |
610 | */ | |
3c7eb27c DG |
611 | |
612 | struct setlogin_args { | |
613 | char *namebuf; | |
614 | }; | |
615 | ||
15637ed4 | 616 | /* ARGSUSED */ |
4c45483e | 617 | int |
15637ed4 RG |
618 | setlogin(p, uap, retval) |
619 | struct proc *p; | |
3c7eb27c | 620 | struct setlogin_args *uap; |
15637ed4 RG |
621 | int *retval; |
622 | { | |
623 | int error; | |
624 | ||
625 | if (error = suser(p->p_ucred, &p->p_acflag)) | |
626 | return (error); | |
627 | error = copyinstr((caddr_t) uap->namebuf, | |
628 | (caddr_t) p->p_pgrp->pg_session->s_login, | |
629 | sizeof (p->p_pgrp->pg_session->s_login) - 1, (u_int *)0); | |
630 | if (error == ENAMETOOLONG) | |
631 | error = EINVAL; | |
632 | return (error); | |
633 | } |