X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/849cbd39568bf29e4eaab12b5974fdc2f038b78c..38a01dbeac9414d4cc0fa1a01ae498024a183078:/usr/src/sys/kern/kern_acct.c

diff --git a/usr/src/sys/kern/kern_acct.c b/usr/src/sys/kern/kern_acct.c
index 2994b17d5e..7be6272ddb 100644
--- a/usr/src/sys/kern/kern_acct.c
+++ b/usr/src/sys/kern/kern_acct.c
@@ -1,140 +1,172 @@
-/*
- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+/*-
+ * Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * %sccs.include.proprietary.c%
  *
- *	@(#)kern_acct.c	7.4 (Berkeley) %G%
+ *	@(#)kern_acct.c	7.26 (Berkeley) %G%
  */
 
-#include "param.h"
-#include "systm.h"
-#include "dir.h"
-#include "user.h"
-#include "inode.h"
-#include "fs.h"
-#include "kernel.h"
-#include "acct.h"
-#include "uio.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/resourcevar.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/termios.h>
+#include <sys/tty.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/kernel.h>
+#include <sys/file.h>
+#include <sys/acct.h>
+#include <sys/syslog.h>
+
+/*
+ * Values associated with enabling and disabling accounting
+ */
+int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
+int	acctresume = 4;		/* resume when free space risen to > 4% */
+int	chk = 15;		/* frequency (in seconds) to check space */
 
 /*
  * SHOULD REPLACE THIS WITH A DRIVER THAT CAN BE READ TO SIMPLIFY.
  */
-struct	inode *acctp;
-struct	inode *savacctp;
+struct	vnode *acctp;
+struct	vnode *savacctp;
 
 /*
- * Perform process accounting functions.
+ * Enable or disable process accounting.
+ *
+ * If a non-null filename is given, that file is used to store accounting
+ * records on process exit. If a null filename is given process accounting
+ * is suspended. If accounting is enabled, the system checks the amount
+ * of freespace on the filesystem at timeval intervals. If the amount of
+ * freespace is below acctsuspend percent, accounting is suspended. If
+ * accounting has been suspended, and freespace rises above acctresume,
+ * accounting is resumed.
  */
-sysacct()
+/* ARGSUSED */
+struct sysacct_args {
+	char	*fname;
+};
+sysacct(p, uap, retval)
+	struct proc *p;
+	struct sysacct_args *uap;
+	int *retval;
 {
-	register struct inode *ip;
-	register struct a {
-		char	*fname;
-	} *uap = (struct a *)u.u_ap;
-	register struct nameidata *ndp = &u.u_nd;
+	register struct vnode *vp;
+	extern void acctwatch __P((void *));
+	struct vnode *oacctp;
+	int error;
+	struct nameidata nd;
 
-	if (u.u_error = suser(u.u_cred, &u.u_acflag))
-		return;
+	if (error = suser(p->p_ucred, &p->p_acflag))
+		return (error);
 	if (savacctp) {
 		acctp = savacctp;
 		savacctp = NULL;
 	}
-	if (uap->fname==NULL) {
-		if (ip = acctp) {
+	if (uap->fname == NULL) {
+		if (vp = acctp) {
 			acctp = NULL;
-			irele(ip);
+			error = vn_close(vp, FWRITE, p->p_ucred, p);
+			untimeout(acctwatch, NULL);
 		}
-		return;
+		return (error);
 	}
-	ndp->ni_nameiop = LOOKUP | FOLLOW;
-	ndp->ni_segflg = UIO_USERSPACE;
-	ndp->ni_dirp = uap->fname;
-	ip = namei(ndp);
-	if (ip == NULL)
-		return;
-	if ((ip->i_mode&IFMT) != IFREG) {
-		u.u_error = EACCES;
-		iput(ip);
-		return;
-	}
-	if (ip->i_fs->fs_ronly) {
-		u.u_error = EROFS;
-		iput(ip);
-		return;
+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
+	if (error = vn_open(&nd, FWRITE, 0644))
+		return (error);
+	vp = nd.ni_vp;
+	VOP_UNLOCK(vp);
+	if (vp->v_type != VREG) {
+		(void) vn_close(vp, FWRITE, p->p_ucred, p);
+		return (EACCES);
 	}
-	if (acctp && (acctp->i_number != ip->i_number ||
-	    acctp->i_dev != ip->i_dev))
-		irele(acctp);
-	acctp = ip;
-	iunlock(ip);
+	oacctp = acctp;
+	acctp = vp;
+	if (oacctp)
+		error = vn_close(oacctp, FWRITE, p->p_ucred, p);
+	acctwatch(NULL);
+	return (error);
 }
 
-int	acctsuspend = 2;	/* stop accounting when < 2% free space left */
-int	acctresume = 4;		/* resume when free space risen to > 4% */
-
-struct	acct acctbuf;
 /*
- * On exit, write a record on the accounting file.
+ * Periodically check the file system to see if accounting
+ * should be turned on or off.
  */
-acct()
+/* ARGSUSED */
+void
+acctwatch(a)
+	void *a;
 {
-	register int i;
-	register struct inode *ip;
-	register struct fs *fs;
-	register struct rusage *ru;
-	off_t siz;
-	struct timeval t;
-	register struct acct *ap = &acctbuf;
+	struct statfs sb;
 
 	if (savacctp) {
-		fs = savacctp->i_fs;
-		if (freespace(fs, fs->fs_minfree + acctresume) > 0) {
+		(void)VFS_STATFS(savacctp->v_mount, &sb, (struct proc *)0);
+		if (sb.f_bavail > acctresume * sb.f_blocks / 100) {
 			acctp = savacctp;
 			savacctp = NULL;
-			printf("Accounting resumed\n");
+			log(LOG_NOTICE, "Accounting resumed\n");
+			return;
 		}
 	}
-	if ((ip = acctp) == NULL)
+	if (acctp == NULL)
 		return;
-	fs = acctp->i_fs;
-	if (freespace(fs, fs->fs_minfree + acctsuspend) <= 0) {
+	(void)VFS_STATFS(acctp->v_mount, &sb, (struct proc *)0);
+	if (sb.f_bavail <= acctsuspend * sb.f_blocks / 100) {
 		savacctp = acctp;
 		acctp = NULL;
-		printf("Accounting suspended\n");
-		return;
+		log(LOG_NOTICE, "Accounting suspended\n");
 	}
-	ilock(ip);
-	bcopy(u.u_comm, ap->ac_comm, sizeof(ap->ac_comm));
-	ru = &u.u_ru;
-	ap->ac_utime = compress(ru->ru_utime.tv_sec, ru->ru_utime.tv_usec);
-	ap->ac_stime = compress(ru->ru_stime.tv_sec, ru->ru_stime.tv_usec);
+	timeout(acctwatch, NULL, chk * hz);
+}
+
+/*
+ * This routine calculates an accounting record for a process and,
+ * if accounting is enabled, writes it to the accounting file.
+ */
+acct(p)
+	register struct proc *p;
+{
+	register struct rusage *ru;
+	struct vnode *vp;
+	struct timeval t, ut, st;
+	int i, s;
+	struct acct acctbuf;
+	register struct acct *ap = &acctbuf;
+
+	if ((vp = acctp) == NULL)
+		return (0);
+	bcopy(p->p_comm, ap->ac_comm, sizeof(ap->ac_comm));
+	ru = &p->p_stats->p_ru;
+	calcru(p, &ut, &st, NULL);
+	s = splclock();
 	t = time;
-	timevalsub(&t, &u.u_start);
+	splx(s);
+	ap->ac_utime = compress(ut.tv_sec, ut.tv_usec);
+	ap->ac_stime = compress(st.tv_sec, st.tv_usec);
+	timevalsub(&t, &p->p_stats->p_start);
 	ap->ac_etime = compress(t.tv_sec, t.tv_usec);
-	ap->ac_btime = u.u_start.tv_sec;
-	ap->ac_uid = u.u_ruid;
-	ap->ac_gid = u.u_rgid;
-	t = ru->ru_stime;
-	timevaladd(&t, &ru->ru_utime);
+	ap->ac_btime = p->p_stats->p_start.tv_sec;
+	ap->ac_uid = p->p_cred->p_ruid;
+	ap->ac_gid = p->p_cred->p_rgid;
+	t = st;
+	timevaladd(&t, &ut);
 	if (i = t.tv_sec * hz + t.tv_usec / tick)
-		ap->ac_mem = (ru->ru_ixrss+ru->ru_idrss+ru->ru_isrss) / i;
+		ap->ac_mem = (ru->ru_ixrss + ru->ru_idrss + ru->ru_isrss) / i;
 	else
 		ap->ac_mem = 0;
-	ap->ac_mem >>= CLSIZELOG2;
 	ap->ac_io = compress(ru->ru_inblock + ru->ru_oublock, (long)0);
-	if (u.u_ttyp)
-		ap->ac_tty = u.u_ttyd;
+	if (p->p_flag&SCTTY && p->p_session->s_ttyp)
+		ap->ac_tty = p->p_session->s_ttyp->t_dev;
 	else
 		ap->ac_tty = NODEV;
-	ap->ac_flag = u.u_acflag;
-	siz = ip->i_size;
-	u.u_error = 0;				/* XXX */
-	u.u_error =
-	    rdwri(UIO_WRITE, ip, (caddr_t)ap, sizeof (acctbuf), siz,
-		1, (int *)0);
-	if (u.u_error)
-		itrunc(ip, (u_long)siz);
-	iunlock(ip);
+	ap->ac_flag = p->p_acflag;
+	return (vn_rdwr(UIO_WRITE, vp, (caddr_t)ap, sizeof (acctbuf), (off_t)0,
+		UIO_SYSSPACE, IO_UNIT|IO_APPEND, p->p_ucred, (int *)0,
+		(struct proc *)0));
 }
 
 /*