projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 49c84d3f | 1 | /* kern_resource.c 4.2 %G% */ |
| 1b64633a BJ |
2 | |
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/systm.h" | |
| 5 | #include "../h/acct.h" | |
| 6 | #include "../h/dir.h" | |
| 7 | #include "../h/user.h" | |
| 8 | #include "../h/inode.h" | |
| 9 | #include "../h/proc.h" | |
| 10 | #include "../h/seg.h" | |
| 11 | ||
| 12 | /* | |
| 13 | * Perform process accounting functions. | |
| 14 | */ | |
| 15 | ||
| 16 | sysacct() | |
| 17 | { | |
| 18 | register struct inode *ip; | |
| 19 | register struct a { | |
| 20 | char *fname; | |
| 21 | } *uap; | |
| 22 | ||
| 23 | uap = (struct a *)u.u_ap; | |
| 24 | if (suser()) { | |
| 25 | if (uap->fname==NULL) { | |
| 26 | if (acctp) { | |
| 27 | plock(acctp); | |
| 28 | iput(acctp); | |
| 29 | acctp = NULL; | |
| 30 | } | |
| 31 | return; | |
| 32 | } | |
| 33 | if (acctp) { | |
| 34 | u.u_error = EBUSY; | |
| 35 | return; | |
| 36 | } | |
| 37 | ip = namei(uchar, 0); | |
| 38 | if(ip == NULL) | |
| 39 | return; | |
| 40 | if((ip->i_mode & IFMT) != IFREG) { | |
| 41 | u.u_error = EACCES; | |
| 42 | iput(ip); | |
| 43 | return; | |
| 44 | } | |
| 45 | acctp = ip; | |
| 46 | prele(ip); | |
| 47 | } | |
| 48 | } | |
| 49 | ||
| 50 | /* | |
| 51 | * On exit, write a record on the accounting file. | |
| 52 | */ | |
| 53 | acct() | |
| 54 | { | |
| 55 | register i; | |
| 56 | register struct inode *ip; | |
| 57 | off_t siz; | |
| 58 | ||
| 59 | if ((ip=acctp)==NULL) | |
| 60 | return; | |
| 61 | plock(ip); | |
| 62 | for (i=0; i<sizeof(acctbuf.ac_comm); i++) | |
| 63 | acctbuf.ac_comm[i] = u.u_comm[i]; | |
| 49c84d3f BJ |
64 | acctbuf.ac_utime = compress((long)u.u_vm.vm_utime); |
| 65 | acctbuf.ac_stime = compress((long)u.u_vm.vm_stime); | |
| 66 | acctbuf.ac_etime = compress((long)(time - u.u_start)); | |
| 1b64633a BJ |
67 | acctbuf.ac_btime = u.u_start; |
| 68 | acctbuf.ac_uid = u.u_ruid; | |
| 69 | acctbuf.ac_gid = u.u_rgid; | |
| 70 | acctbuf.ac_mem = 0; | |
| 79c03a01 BJ |
71 | if (i = u.u_vm.vm_utime + u.u_vm.vm_stime) |
| 72 | acctbuf.ac_mem = (u.u_vm.vm_ixrss + u.u_vm.vm_idsrss) / i; | |
| 49c84d3f | 73 | acctbuf.ac_io = compress((long)(u.u_vm.vm_inblk + u.u_vm.vm_oublk)); |
| 1b64633a BJ |
74 | acctbuf.ac_tty = u.u_ttyd; |
| 75 | acctbuf.ac_flag = u.u_acflag; | |
| 76 | siz = ip->i_size; | |
| 77 | u.u_offset = siz; | |
| 78 | u.u_base = (caddr_t)&acctbuf; | |
| 79 | u.u_count = sizeof(acctbuf); | |
| 80 | u.u_segflg = 1; | |
| 81 | u.u_error = 0; | |
| 82 | writei(ip); | |
| 83 | if(u.u_error) | |
| 84 | ip->i_size = siz; | |
| 85 | prele(ip); | |
| 86 | } | |
| 87 | ||
| 88 | /* | |
| 89 | * Produce a pseudo-floating point representation | |
| 90 | * with 3 bits base-8 exponent, 13 bits fraction. | |
| 91 | */ | |
| 92 | compress(t) | |
| 49c84d3f | 93 | register long t; |
| 1b64633a BJ |
94 | { |
| 95 | register exp = 0, round = 0; | |
| 96 | ||
| 97 | while (t >= 8192) { | |
| 98 | exp++; | |
| 99 | round = t&04; | |
| 100 | t >>= 3; | |
| 101 | } | |
| 102 | if (round) { | |
| 103 | t++; | |
| 104 | if (t >= 8192) { | |
| 105 | t >>= 3; | |
| 106 | exp++; | |
| 107 | } | |
| 108 | } | |
| 109 | return((exp<<13) + t); | |
| 110 | } | |
| 111 | ||
| 112 | /* | |
| 113 | * lock user into core as much | |
| 114 | * as possible. swapping may still | |
| 115 | * occur if core grows. | |
| 116 | */ | |
| 117 | syslock() | |
| 118 | { | |
| 119 | register struct proc *p; | |
| 120 | register struct a { | |
| 121 | int flag; | |
| 122 | } *uap; | |
| 123 | ||
| 124 | uap = (struct a *)u.u_ap; | |
| 125 | if(suser()) { | |
| 126 | p = u.u_procp; | |
| 127 | p->p_flag &= ~SULOCK; | |
| 128 | if(uap->flag) | |
| 129 | p->p_flag |= SULOCK; | |
| 130 | } | |
| 131 | } |