X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/2c3059b12521d35820e41bed7b6b9322bb45a87c..32f555bf0f396f114033687e04d0e47c1d1457af:/usr/src/sys/ufs/lfs/lfs_vnops.c

diff --git a/usr/src/sys/ufs/lfs/lfs_vnops.c b/usr/src/sys/ufs/lfs/lfs_vnops.c
index 61e4662045..97ba1db405 100644
--- a/usr/src/sys/ufs/lfs/lfs_vnops.c
+++ b/usr/src/sys/ufs/lfs/lfs_vnops.c
@@ -1,4 +1,4 @@
-/*	lfs_vnops.c	4.4	%G%	*/
+/*	lfs_vnops.c	4.20	82/03/16	*/
 
 #include "../h/param.h"
 #include "../h/systm.h"
@@ -14,6 +14,8 @@
 #include "../h/conf.h"
 #include "../h/stat.h"
 #include "../h/inline.h"
+#include "../h/socket.h"
+#include "../h/socketvar.h"
 
 /*
  * the fstat system call.
@@ -28,13 +30,16 @@ fstat()
 
 	uap = (struct a *)u.u_ap;
 	fp = getf(uap->fdes);
-	if(fp == NULL)
+	if (fp == NULL)
 		return;
-	stat1(fp->f_inode, uap->sb, fp->f_flag&FPIPE? fp->f_un.f_offset: 0);
+	if (fp->f_flag & FSOCKET)
+		u.u_error = sostat(fp->f_socket, uap->sb);
+	else
+		stat1(fp->f_inode, uap->sb);
 }
 
 /*
- * the stat system call.
+ * Stat system call.  This version does not follow links.
  */
 stat()
 {
@@ -45,10 +50,29 @@ stat()
 	} *uap;
 
 	uap = (struct a *)u.u_ap;
-	ip = namei(uchar, 0);
-	if(ip == NULL)
+	ip = namei(uchar, 0, 0);
+	if (ip == NULL)
 		return;
-	stat1(ip, uap->sb, (off_t)0);
+	stat1(ip, uap->sb);
+	iput(ip);
+}
+
+/*
+ * Lstat system call.  This version does follow links.
+ */
+lstat()
+{
+	register struct inode *ip;
+	register struct a {
+		char	*fname;
+		struct stat *sb;
+	} *uap;
+
+	uap = (struct a *)u.u_ap;
+	ip = namei(uchar, 0, 1);
+	if (ip == NULL)
+		return;
+	stat1(ip, uap->sb);
 	iput(ip);
 }
 
@@ -56,10 +80,9 @@ stat()
  * The basic routine for fstat and stat:
  * get the inode and pass appropriate parts back.
  */
-stat1(ip, ub, pipeadj)
-register struct inode *ip;
-struct stat *ub;
-off_t pipeadj;
+stat1(ip, ub)
+	register struct inode *ip;
+	struct stat *ub;
 {
 	register struct dinode *dp;
 	register struct buf *bp;
@@ -67,7 +90,7 @@ off_t pipeadj;
 
 	IUPDAT(ip, &time, &time, 0);
 	/*
-	 * first copy from inode table
+	 * First copy from inode table
 	 */
 	ds.st_dev = ip->i_dev;
 	ds.st_ino = ip->i_number;
@@ -76,7 +99,7 @@ off_t pipeadj;
 	ds.st_uid = ip->i_uid;
 	ds.st_gid = ip->i_gid;
 	ds.st_rdev = (dev_t)ip->i_un.i_rdev;
-	ds.st_size = ip->i_size - pipeadj;
+	ds.st_size = ip->i_size;
 	/*
 	 * next the dates in the disk
 	 */
@@ -91,6 +114,80 @@ off_t pipeadj;
 		u.u_error = EFAULT;
 }
 
+/*
+ * Return target name of a symbolic link
+ */
+readlink()
+{
+	register struct inode *ip;
+	register struct a {
+		char	*name;
+		char	*buf;
+		int	count;
+	} *uap;
+
+	ip = namei(uchar, 0, 0);
+	if (ip == NULL)
+		return;
+	if ((ip->i_mode&IFMT) != IFLNK) {
+		u.u_error = ENXIO;
+		goto out;
+	}
+	uap = (struct a *)u.u_ap;
+	u.u_offset = 0;
+	u.u_base = uap->buf;
+	u.u_count = uap->count;
+	u.u_segflg = 0;
+	readi(ip);
+out:
+	iput(ip);
+	u.u_r.r_val1 = uap->count - u.u_count;
+}
+
+/*
+ * symlink -- make a symbolic link
+ */
+symlink()
+{
+	register struct a {
+		char	*target;
+		char	*linkname;
+	} *uap;
+	register struct inode *ip;
+	register char *tp;
+	register c, nc;
+
+	uap = (struct a *)u.u_ap;
+	tp = uap->target;
+	nc = 0;
+	while (c = fubyte(tp)) {
+		if (c < 0) {
+			u.u_error = EFAULT;
+			return;
+		}
+		tp++;
+		nc++;
+	}
+	u.u_dirp = uap->linkname;
+	ip = namei(uchar, 1, 0);
+	if (ip) {
+		iput(ip);
+		u.u_error = EEXIST;
+		return;
+	}
+	if (u.u_error)
+		return;
+	ip = maknode(IFLNK | 0777);
+	if (ip == NULL)
+		return;
+	u.u_base = uap->target;
+	u.u_count = nc;
+	u.u_offset = 0;
+	u.u_segflg = 0;
+	writei(ip);
+	iput(ip);
+}
+
 /*
  * the dup system call.
  */
@@ -107,7 +204,7 @@ dup()
 	m = uap->fdes & ~077;
 	uap->fdes &= 077;
 	fp = getf(uap->fdes);
-	if(fp == NULL)
+	if (fp == NULL)
 		return;
 	if ((m&0100) == 0) {
 		if ((i = ufalloc()) < 0)
@@ -118,22 +215,20 @@ dup()
 			u.u_error = EBADF;
 			return;
 		}
-		if (u.u_vrpages[i]) {
-			u.u_error = ETXTBSY;
-			return;
-		}
 		u.u_r.r_val1 = i;
 	}
-	if (i!=uap->fdes) {
+	if (i != uap->fdes) {
 		if (u.u_ofile[i]!=NULL)
-			closef(u.u_ofile[i]);
+			closef(u.u_ofile[i], 0);
+		if (u.u_error)
+			return;
 		u.u_ofile[i] = fp;
 		fp->f_count++;
 	}
 }
 
 /*
- * the mount system call.
+ * Mount system call.
  */
 smount()
 {
@@ -148,34 +243,35 @@ smount()
 		char	*freg;
 		int	ronly;
 	} *uap;
+	register char *cp;
 
 	uap = (struct a *)u.u_ap;
 	dev = getmdev();
-	if(u.u_error)
+	if (u.u_error)
 		return;
 	u.u_dirp = (caddr_t)uap->freg;
-	ip = namei(uchar, 0);
-	if(ip == NULL)
+	ip = namei(uchar, 0, 1);
+	if (ip == NULL)
 		return;
-	if(ip->i_count!=1 || (ip->i_mode&(IFBLK&IFCHR))!=0)
+	if (ip->i_count!=1 || (ip->i_mode&IFMT) != IFDIR)
 		goto out;
 	smp = NULL;
-	for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++) {
-		if(mp->m_bufp != NULL) {
-			if(dev == mp->m_dev)
+	for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++) {
+		if (mp->m_bufp != NULL) {
+			if (dev == mp->m_dev)
 				goto out;
 		} else
-		if(smp == NULL)
+		if (smp == NULL)
 			smp = mp;
 	}
 	mp = smp;
-	if(mp == NULL)
+	if (mp == NULL)
 		goto out;
 	(*bdevsw[major(dev)].d_open)(dev, !uap->ronly);
-	if(u.u_error)
+	if (u.u_error)
 		goto out;
 	bp = bread(dev, SUPERB);
-	if(u.u_error) {
+	if (u.u_error) {
 		brelse(bp);
 		goto out1;
 	}
@@ -189,9 +285,14 @@ smount()
 	fp->s_ronly = uap->ronly & 1;
 	fp->s_nbehind = 0;
 	fp->s_lasti = 1;
+	u.u_dirp = uap->freg;
+	for (cp = fp->s_fsmnt; cp < &fp->s_fsmnt[sizeof (fp->s_fsmnt) - 1]; )
+		if ((*cp++ = uchar()) == 0)
+			u.u_dirp--;		/* get 0 again */
+	*cp = 0;
 	brelse(bp);
 	ip->i_flag |= IMOUNT;
-	prele(ip);
+	irele(ip);
 	return;
 
 out:
@@ -215,18 +316,19 @@ sumount()
 	};
 
 	dev = getmdev();
-	if(u.u_error)
+	if (u.u_error)
 		return;
 	xumount(dev);	/* remove unused sticky files from text table */
-	update();
-	for(mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
-		if(mp->m_bufp != NULL && dev == mp->m_dev)
+	update(0);
+	for (mp = &mount[0]; mp < &mount[NMOUNT]; mp++)
+		if (mp->m_bufp != NULL && dev == mp->m_dev)
 			goto found;
 	u.u_error = EINVAL;
 	return;
 
 found:
-	for(ip = &inode[0]; ip < &inode[NINODE]; ip++)
+	stillopen = 0;
+	for (ip = inode; ip < inodeNINODE; ip++)
 		if (ip->i_number != 0 && dev == ip->i_dev) {
 			u.u_error = EBUSY;
 			return;
@@ -235,7 +337,7 @@ found:
 			stillopen++;
 	ip = mp->m_inodp;
 	ip->i_flag &= ~IMOUNT;
-	plock(ip);
+	ilock(ip);
 	iput(ip);
 	if ((bp = getblk(dev, SUPERB)) != mp->m_bufp)
 		panic("umount");
@@ -243,8 +345,8 @@ found:
 	flag = !bp->b_un.b_filsys->s_ronly;
 	mp->m_bufp = NULL;
 	brelse(bp);
+	mpurge(mp - &mount[0]);
 	if (!stillopen) {
-		mpurge(mp - &mount[0]);
 		(*bdevsw[major(dev)].d_close)(dev, flag);
 		binval(dev);
 	}
@@ -263,13 +365,13 @@ getmdev()
 
 	if (!suser())
 		return(NODEV);
-	ip = namei(uchar, 0);
-	if(ip == NULL)
+	ip = namei(uchar, 0, 1);
+	if (ip == NULL)
 		return(NODEV);
-	if((ip->i_mode&IFMT) != IFBLK)
+	if ((ip->i_mode&IFMT) != IFBLK)
 		u.u_error = ENOTBLK;
 	dev = (dev_t)ip->i_un.i_rdev;
-	if(major(dev) >= nblkdev)
+	if (major(dev) >= nblkdev)
 		u.u_error = ENXIO;
 	iput(ip);
 	return(dev);