#include "sys/param.h" #include "sys/systm.h" #include "sys/acct.h" #include "sys/dir.h" #include "sys/user.h" #include "sys/inode.h" /* * Perform process accounting functions. */ sysacct() { register struct inode *ip; register struct a { char *fname; } *uap; uap = (struct a *)u.u_ap; if (!suser()) return; if (uap->fname==NULL) { if (acctp) { plock(acctp); iput(acctp); acctp = NULL; } return; } if (acctp) { u.u_error = EBUSY; return; } ip = namei(uchar, 0); if(ip == NULL) return; if((ip->i_mode & IFMT) != IFREG) { u.u_error = EACCES; iput(ip); return; } acctp = ip; prele(ip); } /* * On exit, write a record on the accounting file. */ acct(st) { register struct inode *ip; off_t siz; if ((ip=acctp)==NULL) return; plock(ip); bcopy(u.u_comm,acctbuf.ac_comm,sizeof(acctbuf.ac_comm)); acctbuf.ac_btime = u.u_start; acctbuf.ac_utime = compress(u.u_utime); acctbuf.ac_stime = compress(u.u_stime); acctbuf.ac_etime = compress(lbolt - u.u_ticks); acctbuf.ac_mem = compress(u.u_mem); acctbuf.ac_io = compress(u.u_ioch); acctbuf.ac_rw = compress(u.u_ior+u.u_iow); acctbuf.ac_uid = u.u_ruid; acctbuf.ac_gid = u.u_rgid; acctbuf.ac_tty = u.u_ttyp ? u.u_ttyd : NODEV; acctbuf.ac_stat = st; acctbuf.ac_flag = u.u_acflag; siz = ip->i_size; u.u_offset = siz; u.u_base = (caddr_t)&acctbuf; u.u_count = sizeof(acctbuf); u.u_segflg = 1; u.u_error = 0; u.u_limit = (daddr_t)5000; writei(ip); if(u.u_error) ip->i_size = siz; prele(ip); } /* * Produce a pseudo-floating point representation * with 3 bits base-8 exponent, 13 bits fraction. */ compress(t) register time_t t; { register exp = 0, round = 0; while (t >= 8192) { exp++; round = t&04; t >>= 3; } if (round) { t++; if (t >= 8192) { t >>= 3; exp++; } } return((exp<<13) + t); }