diff --git a/usr.sbin/pkg_install/add/main.c b/usr.sbin/pkg_install/add/main.c
index 26e5e3053102..4dd91098e878 100644
--- a/usr.sbin/pkg_install/add/main.c
+++ b/usr.sbin/pkg_install/add/main.c
@@ -1,5 +1,5 @@
 #ifndef lint
-static char *rcsid = "$Id: main.c,v 1.8 1995/10/25 15:37:47 jkh Exp $";
+static char *rcsid = "$Id: main.c,v 1.9 1995/11/12 04:55:19 jkh Exp $";
 #endif
 
 /*
@@ -113,7 +113,9 @@ main(int argc, char **argv)
 
 	/* Get all the remaining package names, if any */
 	for (ch = 0; *argv; ch++, argv++) {
-	    if (isURL(*argv))	/* preserve URLs */
+	    if (!strcmp(*argv, "-"))	/* stdin? */
+		pkgs[ch] = "-";
+	    else if (isURL(*argv))	/* preserve URLs */
 		pkgs[ch] = strcpy(pkgnames[ch], *argv);
 	    else {			/* expand all pathnames to fullnames */
 		if (fexists(*argv)) /* refers to a file directly */
diff --git a/usr.sbin/pkg_install/add/perform.c b/usr.sbin/pkg_install/add/perform.c
index 156de9981a90..1267d0ef828b 100644
--- a/usr.sbin/pkg_install/add/perform.c
+++ b/usr.sbin/pkg_install/add/perform.c
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char *rcsid = "$Id: perform.c,v 1.31 1995/10/31 20:30:15 jkh Exp $";
+static const char *rcsid = "$Id: perform.c,v 1.32 1995/11/12 04:55:23 jkh Exp $";
 #endif
 
 /*
@@ -63,7 +63,7 @@ pkg_do(char *pkg)
     char pkg_fullname[FILENAME_MAX];
     char playpen[FILENAME_MAX];
     char extract_contents[FILENAME_MAX];
-    char *where_to, *tmp;
+    char *where_to, *tmp, *extract;
     FILE *cfile;
     int code;
     PackingList p;
@@ -107,17 +107,22 @@ pkg_do(char *pkg)
 	    fclose(cfile);
 	}
 	else {
-	    strcpy(pkg_fullname,pkg);		/* copy for sanity's sake, could remove pkg_fullname */
-	    if (stat(pkg_fullname, &sb) == FAIL) {
-		whinge("Can't stat package file '%s'.", pkg_fullname);
-		goto bomb;
+	    strcpy(pkg_fullname, pkg);		/* copy for sanity's sake, could remove pkg_fullname */
+	    if (strcmp(pkg, "-")) {
+		if (stat(pkg_fullname, &sb) == FAIL) {
+		    whinge("Can't stat package file '%s'.", pkg_fullname);
+		    goto bomb;
+		}
+		sprintf(extract_contents, "--fast-read %s", CONTENTS_FNAME);
+		extract = extract_contents;
 	    }
+	    else
+		extract = NULL;
 	    Home = make_playpen(playpen, sb.st_size * 4);
 	    if (!Home)
 		whinge("Unable to make playpen for %d bytes.\n", sb.st_size * 4);
 	    where_to = Home;
-	    sprintf(extract_contents, "--fast-read %s", CONTENTS_FNAME);
-	    if (unpack(pkg_fullname, extract_contents)) {
+	    if (unpack(pkg_fullname, extract)) {
 		whinge("Unable to extract table of contents file from `%s' - not a package?.", pkg_fullname);
 		goto bomb;
 	    }
@@ -160,7 +165,7 @@ pkg_do(char *pkg)
 	     * compress an average of 75%, so multiply by 4 for good measure.
 	     */
 
-	    if (min_free(playpen) < sb.st_size * 4) {
+	    if (!inPlace && min_free(playpen) < sb.st_size * 4) {
 		whinge("Projected size of %d exceeds available free space.\n"
 		       "Please set your PKG_TMPDIR variable to point to a location with more\n"
 		       "free space and try again.", sb.st_size * 4);
@@ -178,6 +183,7 @@ pkg_do(char *pkg)
 		goto bomb;
 	    }
 	}
+
 	/* Check for sanity and dependencies */
 	if (sanity_check(pkg))
 	    goto bomb;
diff --git a/usr.sbin/pkg_install/add/pkg_add.1 b/usr.sbin/pkg_install/add/pkg_add.1
index 0358048132dc..8e4a0f7427bf 100644
--- a/usr.sbin/pkg_install/add/pkg_add.1
+++ b/usr.sbin/pkg_install/add/pkg_add.1
@@ -66,8 +66,10 @@ command to examine the package file.
 .Sh OPTIONS
 The following command line arguments are supported.
 .Bl -tag -width indent
-.It Ar pkg-name ...
-Packages in the named files are installed.
+.It Ar pkg-name [... pkg-name]
+The named packages are installed.  A package name of - will cause
+.Nm
+to read from stdin.
 .It Fl v
 Turns on verbose output.
 .Em "Optional."
diff --git a/usr.sbin/pkg_install/lib/file.c b/usr.sbin/pkg_install/lib/file.c
index bddebab09f55..19ce0136af2d 100644
--- a/usr.sbin/pkg_install/lib/file.c
+++ b/usr.sbin/pkg_install/lib/file.c
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char *rcsid = "$Id: file.c,v 1.19 1995/11/12 04:55:38 jkh Exp $";
+static const char *rcsid = "$Id: file.c,v 1.20 1996/02/19 02:35:56 mpp Exp $";
 #endif
 
 /*
@@ -432,17 +432,21 @@ unpack(char *pkg, char *flist)
 {
     char args[10], suffix[80], *cp;
 
+    args[0] = '\0';
     /*
      * Figure out by a crude heuristic whether this or not this is probably
      * compressed.
      */
-    args[0] = '\0';
-    cp = rindex(pkg, '.');
-    if (cp) {
-	strcpy(suffix, cp + 1);
-	if (index(suffix, 'z') || index(suffix, 'Z'))
-	    strcpy(args, "-z");
+    if (strcmp(pkg, "-")) {
+	cp = rindex(pkg, '.');
+	if (cp) {
+	    strcpy(suffix, cp + 1);
+	    if (index(suffix, 'z') || index(suffix, 'Z'))
+		strcpy(args, "-z");
+	}
     }
+    else
+	strcpy(args, "z");
     strcat(args, "xpf");
     if (vsystem("tar %s %s %s", args, pkg, flist ? flist : "")) {
 	whinge("Tar extract of %s failed!", pkg);