1 /* 2 * Copyright (c) 1982, 1986, 1989 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)kern_sysctl.c 7.17 (Berkeley) 06/26/91 8 */ 9 10 #include "param.h" 11 #include "proc.h" 12 #include "kinfo.h" 13 #include "ioctl.h" 14 #include "tty.h" 15 #include "buf.h" 16 #include "file.h" 17 18 #include "vm/vm.h" 19 20 #include "kinfo_proc.h" 21 22 #define snderr(e) { error = (e); goto release;} 23 extern int kinfo_doproc(), kinfo_rtable(), kinfo_vnode(), kinfo_file(); 24 struct kinfo_lock kinfo_lock; 25 26 /* ARGSUSED */ 27 getkerninfo(p, uap, retval) 28 struct proc *p; 29 register struct args { 30 int op; 31 char *where; 32 int *size; 33 int arg; 34 } *uap; 35 int *retval; 36 { 37 38 int bufsize; /* max size of users buffer */ 39 int needed, locked, (*server)(), error = 0; 40 41 if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize, 42 sizeof (bufsize))) 43 goto done; 44 45 switch (ki_type(uap->op)) { 46 47 case KINFO_PROC: 48 server = kinfo_doproc; 49 break; 50 51 case KINFO_RT: 52 server = kinfo_rtable; 53 break; 54 55 case KINFO_VNODE: 56 server = kinfo_vnode; 57 break; 58 59 case KINFO_FILE: 60 server = kinfo_file; 61 break; 62 63 default: 64 error = EINVAL; 65 goto done; 66 } 67 if (uap->where == NULL || uap->size == NULL) { 68 error = (*server)(uap->op, NULL, NULL, uap->arg, &needed); 69 goto done; 70 } 71 while (kinfo_lock.kl_lock) { 72 kinfo_lock.kl_want++; 73 sleep(&kinfo_lock, PRIBIO+1); 74 kinfo_lock.kl_want--; 75 kinfo_lock.kl_locked++; 76 } 77 kinfo_lock.kl_lock++; 78 79 if (!useracc(uap->where, bufsize, B_WRITE)) 80 snderr(EFAULT); 81 if (server != kinfo_vnode) /* XXX */ 82 vslock(uap->where, bufsize); 83 locked = bufsize; 84 error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed); 85 if (server != kinfo_vnode) /* XXX */ 86 vsunlock(uap->where, locked, B_WRITE); 87 if (error == 0) 88 error = copyout((caddr_t)&bufsize, 89 (caddr_t)uap->size, sizeof (bufsize)); 90 release: 91 kinfo_lock.kl_lock--; 92 if (kinfo_lock.kl_want) 93 wakeup(&kinfo_lock); 94 done: 95 if (!error) 96 *retval = needed; 97 return (error); 98 } 99 100 /* 101 * try over estimating by 5 procs 102 */ 103 #define KINFO_PROCSLOP (5 * sizeof (struct kinfo_proc)) 104 105 kinfo_doproc(op, where, acopysize, arg, aneeded) 106 char *where; 107 int *acopysize, *aneeded; 108 { 109 register struct proc *p; 110 register struct kinfo_proc *dp = (struct kinfo_proc *)where; 111 register needed = 0; 112 int buflen; 113 int doingzomb; 114 struct eproc eproc; 115 int error = 0; 116 117 if (where != NULL) 118 buflen = *acopysize; 119 120 p = allproc; 121 doingzomb = 0; 122 again: 123 for (; p != NULL; p = p->p_nxt) { 124 /* 125 * TODO - make more efficient (see notes below). 126 * do by session. 127 */ 128 switch (ki_op(op)) { 129 130 case KINFO_PROC_PID: 131 /* could do this with just a lookup */ 132 if (p->p_pid != (pid_t)arg) 133 continue; 134 break; 135 136 case KINFO_PROC_PGRP: 137 /* could do this by traversing pgrp */ 138 if (p->p_pgrp->pg_id != (pid_t)arg) 139 continue; 140 break; 141 142 case KINFO_PROC_TTY: 143 if ((p->p_flag&SCTTY) == 0 || 144 p->p_session->s_ttyp == NULL || 145 p->p_session->s_ttyp->t_dev != (dev_t)arg) 146 continue; 147 break; 148 149 case KINFO_PROC_UID: 150 if (p->p_ucred->cr_uid != (uid_t)arg) 151 continue; 152 break; 153 154 case KINFO_PROC_RUID: 155 if (p->p_cred->p_ruid != (uid_t)arg) 156 continue; 157 break; 158 } 159 if (where != NULL && buflen >= sizeof (struct kinfo_proc)) { 160 fill_eproc(p, &eproc); 161 if (error = copyout((caddr_t)p, &dp->kp_proc, 162 sizeof (struct proc))) 163 return (error); 164 if (error = copyout((caddr_t)&eproc, &dp->kp_eproc, 165 sizeof (eproc))) 166 return (error); 167 dp++; 168 buflen -= sizeof (struct kinfo_proc); 169 } 170 needed += sizeof (struct kinfo_proc); 171 } 172 if (doingzomb == 0) { 173 p = zombproc; 174 doingzomb++; 175 goto again; 176 } 177 if (where != NULL) 178 *acopysize = (caddr_t)dp - where; 179 else 180 needed += KINFO_PROCSLOP; 181 *aneeded = needed; 182 183 return (0); 184 } 185 186 /* 187 * Fill in an eproc structure for the specified process. 188 */ 189 void 190 fill_eproc(p, ep) 191 register struct proc *p; 192 register struct eproc *ep; 193 { 194 register struct tty *tp; 195 196 ep->e_paddr = p; 197 ep->e_sess = p->p_pgrp->pg_session; 198 ep->e_pcred = *p->p_cred; 199 ep->e_ucred = *p->p_ucred; 200 ep->e_vm = *p->p_vmspace; 201 if (p->p_pptr) 202 ep->e_ppid = p->p_pptr->p_pid; 203 else 204 ep->e_ppid = 0; 205 ep->e_pgid = p->p_pgrp->pg_id; 206 ep->e_jobc = p->p_pgrp->pg_jobc; 207 if ((p->p_flag&SCTTY) && 208 (tp = ep->e_sess->s_ttyp)) { 209 ep->e_tdev = tp->t_dev; 210 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 211 ep->e_tsess = tp->t_session; 212 } else 213 ep->e_tdev = NODEV; 214 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 215 if (SESS_LEADER(p)) 216 ep->e_flag |= EPROC_SLEADER; 217 if (p->p_wmesg) 218 strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN); 219 ep->e_xsize = ep->e_xrssize = 0; 220 ep->e_xccount = ep->e_xswrss = 0; 221 } 222 223 /* 224 * Get file structures. 225 */ 226 kinfo_file(op, where, acopysize, arg, aneeded) 227 register char *where; 228 int *acopysize, *aneeded; 229 { 230 int buflen, needed, error; 231 struct file *fp; 232 char *start = where; 233 234 if (where == NULL) { 235 /* 236 * overestimate by 10 files 237 */ 238 *aneeded = sizeof (filehead) + 239 (nfiles + 10) * sizeof (struct file); 240 return (0); 241 } 242 buflen = *acopysize; 243 needed = 0; 244 245 /* 246 * first copyout filehead 247 */ 248 if (buflen > sizeof (filehead)) { 249 if (error = copyout((caddr_t)&filehead, where, 250 sizeof (filehead))) 251 return (error); 252 buflen -= sizeof (filehead); 253 where += sizeof (filehead); 254 } 255 needed += sizeof (filehead); 256 257 /* 258 * followed by an array of file structures 259 */ 260 for (fp = filehead; fp != NULL; fp = fp->f_filef) { 261 if (buflen > sizeof (struct file)) { 262 if (error = copyout((caddr_t)fp, where, 263 sizeof (struct file))) 264 return (error); 265 buflen -= sizeof (struct file); 266 where += sizeof (struct file); 267 } 268 needed += sizeof (struct file); 269 } 270 *acopysize = where - start; 271 *aneeded = needed; 272 273 return (0); 274 } 275