projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 06138e31 SL |
1 | /* kern_acct.c 4.1 83/05/27 */ |
| 2 | ||
| 3 | #include "../h/param.h" | |
| 4 | #include "../h/systm.h" | |
| 5 | #include "../h/dir.h" | |
| 6 | #include "../h/user.h" | |
| 7 | #include "../h/inode.h" | |
| 8 | #include "../h/fs.h" | |
| 9 | #include "../h/kernel.h" | |
| 10 | #include "../h/acct.h" | |
| 11 | #include "../h/nami.h" | |
| 12 | #include "../h/uio.h" | |
| 13 | ||
| 14 | /* | |
| 15 | * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY. | |
| 16 | */ | |
| 17 | struct inode *acctp; | |
| 18 | struct inode *savacctp; | |
| 19 | ||
| 20 | /* | |
| 21 | * Perform process accounting functions. | |
| 22 | */ | |
| 23 | sysacct() | |
| 24 | { | |
| 25 | register struct inode *ip; | |
| 26 | register struct a { | |
| 27 | char *fname; | |
| 28 | } *uap = (struct a *)u.u_ap; | |
| 29 | ||
| 30 | if (suser()) { | |
| 31 | if (savacctp) { | |
| 32 | acctp = savacctp; | |
| 33 | savacctp = NULL; | |
| 34 | } | |
| 35 | if (uap->fname==NULL) { | |
| 36 | if (ip = acctp) { | |
| 37 | irele(ip); | |
| 38 | acctp = NULL; | |
| 39 | } | |
| 40 | return; | |
| 41 | } | |
| 42 | ip = namei(uchar, LOOKUP, 1); | |
| 43 | if(ip == NULL) | |
| 44 | return; | |
| 45 | if((ip->i_mode & IFMT) != IFREG) { | |
| 46 | u.u_error = EACCES; | |
| 47 | iput(ip); | |
| 48 | return; | |
| 49 | } | |
| 50 | if (acctp && (acctp->i_number != ip->i_number || | |
| 51 | acctp->i_dev != ip->i_dev)) | |
| 52 | irele(acctp); | |
| 53 | acctp = ip; | |
| 54 | iunlock(ip); | |
| 55 | } | |
| 56 | } | |
| 57 | ||
| 58 | int acctsuspend = 2; /* stop accounting when < 2% free space left */ | |
| 59 | int acctresume = 4; /* resume when free space risen to > 4% */ | |
| 60 | ||
| 61 | struct acct acctbuf; | |
| 62 | /* | |
| 63 | * On exit, write a record on the accounting file. | |
| 64 | */ | |
| 65 | acct() | |
| 66 | { | |
| 67 | register int i; | |
| 68 | register struct inode *ip; | |
| 69 | register struct fs *fs; | |
| 70 | off_t siz; | |
| 71 | register struct acct *ap = &acctbuf; | |
| 72 | ||
| 73 | if (savacctp) { | |
| 74 | fs = savacctp->i_fs; | |
| 75 | if (freespace(fs, fs->fs_minfree + acctresume) > 0) { | |
| 76 | acctp = savacctp; | |
| 77 | savacctp = NULL; | |
| 78 | printf("Accounting resumed\n"); | |
| 79 | } | |
| 80 | } | |
| 81 | if ((ip = acctp) == NULL) | |
| 82 | return; | |
| 83 | fs = acctp->i_fs; | |
| 84 | if (freespace(fs, fs->fs_minfree + acctsuspend) <= 0) { | |
| 85 | savacctp = acctp; | |
| 86 | acctp = NULL; | |
| 87 | printf("Accounting suspended\n"); | |
| 88 | return; | |
| 89 | } | |
| 90 | ilock(ip); | |
| 91 | for (i = 0; i < sizeof (ap->ac_comm); i++) | |
| 92 | ap->ac_comm[i] = u.u_comm[i]; | |
| 93 | ap->ac_utime = compress((long)u.u_ru.ru_utime.tv_sec); | |
| 94 | ap->ac_stime = compress((long)u.u_ru.ru_stime.tv_sec); | |
| 95 | ap->ac_etime = compress((long)time.tv_sec - u.u_start); | |
| 96 | ap->ac_btime = u.u_start; | |
| 97 | ap->ac_uid = u.u_ruid; | |
| 98 | ap->ac_gid = u.u_rgid; | |
| 99 | ap->ac_mem = 0; | |
| 100 | if (i = u.u_ru.ru_utime.tv_sec + u.u_ru.ru_stime.tv_sec) | |
| 101 | ap->ac_mem = | |
| 102 | (u.u_ru.ru_ixrss + u.u_ru.ru_idrss + u.u_ru.ru_isrss) / i; | |
| 103 | ap->ac_io = compress((long)(u.u_ru.ru_inblock + u.u_ru.ru_oublock)); | |
| 104 | if (u.u_ttyp) | |
| 105 | ap->ac_tty = u.u_ttyd; | |
| 106 | else | |
| 107 | ap->ac_tty = NODEV; | |
| 108 | ap->ac_flag = u.u_acflag; | |
| 109 | siz = ip->i_size; | |
| 110 | u.u_error = 0; /* XXX */ | |
| 111 | u.u_error = | |
| 112 | rdwri(UIO_WRITE, ip, (caddr_t)ap, sizeof (acctbuf), siz, | |
| 113 | 1, (int *)0); | |
| 114 | if (u.u_error) | |
| 115 | itrunc(ip, (u_long)siz); | |
| 116 | iunlock(ip); | |
| 117 | } | |
| 118 | ||
| 119 | /* | |
| 120 | * Produce a pseudo-floating point representation | |
| 121 | * with 3 bits base-8 exponent, 13 bits fraction. | |
| 122 | */ | |
| 123 | compress(t) | |
| 124 | register long t; | |
| 125 | { | |
| 126 | register exp = 0, round = 0; | |
| 127 | ||
| 128 | while (t >= 8192) { | |
| 129 | exp++; | |
| 130 | round = t&04; | |
| 131 | t >>= 3; | |
| 132 | } | |
| 133 | if (round) { | |
| 134 | t++; | |
| 135 | if (t >= 8192) { | |
| 136 | t >>= 3; | |
| 137 | exp++; | |
| 138 | } | |
| 139 | } | |
| 140 | return ((exp<<13) + t); | |
| 141 | } |