impliment -z (gzip) in pax and tar, and -Z (compress) in tar.

bin/pax/ar_io.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: ar_io.c,v 1.4 1995/03/21 09:07:04 cgd Exp $	*/
+/*	$NetBSD: ar_io.c,v 1.5 1996/03/26 23:54:13 mrg Exp $	*/
 
 /*-
  * Copyright (c) 1992 Keith Muller.
@@ -41,7 +41,7 @@
 #if 0
 static char sccsid[] = "@(#)ar_io.c	8.2 (Berkeley) 4/18/94";
 #else
-static char rcsid[] = "$NetBSD: ar_io.c,v 1.4 1995/03/21 09:07:04 cgd Exp $";
+static char rcsid[] = "$NetBSD: ar_io.c,v 1.5 1996/03/26 23:54:13 mrg Exp $";
 #endif
 #endif /* not lint */
 
@@ -84,9 +84,11 @@ static int invld_rec;			/* tape has out of spec record size */
 static int wr_trail = 1;		/* trailer was rewritten in append */
 static int can_unlnk = 0;		/* do we unlink null archives?  */
 char *arcname;                  	/* printable name of archive */
+char *gzip_program;			/* name of gzip program */
 
 static int get_phys __P((void));
 extern sigset_t s_mask;
+static void ar_start_gzip __P((int));
 
 /*
  * ar_open()
@@ -126,6 +128,8 @@ ar_open(name)
 			arcname = STDN;
 		} else if ((arfd = open(name, EXT_MODE, DMOD)) < 0)
 			syswarn(0, errno, "Failed open to read on %s", name);
+		if (zflag)
+			ar_start_gzip(arfd);
 		break;
 	case ARCHIVE:
 		if (name == NULL) {
@@ -135,8 +139,12 @@ ar_open(name)
 			syswarn(0, errno, "Failed open to write on %s", name);
 		else
 			can_unlnk = 1;
+		if (zflag)
+			ar_start_gzip(arfd);
 		break;
 	case APPND:
+		if (zflag)
+			err(1, "can not gzip while appending");
 		if (name == NULL) {
 			arfd = STDOUT_FILENO;
 			arcname = STDO;
@@ -1292,3 +1300,65 @@ ar_next()
 	}
 	return(0);
 }
+
+/*
+ * ar_start_gzip()
+ * starts the gzip compression/decompression process as a child, using magic
+ * to keep the fd the same in the calling function (parent).
+ */
+void
+#ifdef __STDC__
+ar_start_gzip(int fd)
+#else
+ar_start_gzip(fd)
+	int fd;
+#endif
+{
+	pid_t pid;
+	int fds[2];
+	char *gzip_flags;
+
+	if (pipe(fds) < 0)
+		err(1, "could not pipe");
+	pid = fork();
+	if (pid < 0)
+		err(1, "could not fork");
+
+	/* parent */
+	if (pid) {
+		switch (act) {
+		case ARCHIVE:
+			dup2(fds[1], fd);
+			break;
+		case LIST:
+		case EXTRACT:
+			dup2(fds[0], fd);
+			break;
+		default:
+			errx(1, "ar_start_gzip:  impossible");
+		}
+		close(fds[0]);
+		close(fds[1]);
+	} else {
+		switch (act) {
+		case ARCHIVE:
+			dup2(fds[0], STDIN_FILENO);
+			dup2(fd, STDOUT_FILENO);
+			gzip_flags = "-c";
+			break;
+		case LIST:
+		case EXTRACT:
+			dup2(fds[1], STDOUT_FILENO);
+			dup2(fd, STDIN_FILENO);
+			gzip_flags = "-dc";
+			break;
+		default:
+			errx(1, "ar_start_gzip:  impossible");
+		}
+		close(fds[0]);
+		close(fds[1]);
+		if (execlp(gzip_program, gzip_program, gzip_flags, NULL) < 0)
+			err(1, "could not exec");
+		/* NOTREACHED */
+	}
+}

bin/pax/extern.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: extern.h,v 1.4 1995/03/21 09:07:16 cgd Exp $	*/
+/*	$NetBSD: extern.h,v 1.5 1996/03/26 23:54:16 mrg Exp $	*/
 
 /*-
  * Copyright (c) 1992 Keith Muller.
@@ -49,6 +49,7 @@
  * ar_io.c
  */
 extern char *arcname;
+extern char *gzip_program;
 int ar_open __P((char *));
 void ar_close __P((void));
 void ar_drain __P((void));
@@ -215,6 +216,7 @@ extern int nflag;
 extern int tflag;
 extern int uflag;
 extern int vflag;
+extern int zflag;
 extern int Dflag;
 extern int Hflag;
 extern int Lflag;

bin/pax/options.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: options.c,v 1.5 1995/03/21 09:07:30 cgd Exp $	*/
+/*	$NetBSD: options.c,v 1.6 1996/03/26 23:54:18 mrg Exp $	*/
 
 /*-
  * Copyright (c) 1992 Keith Muller.
@@ -41,7 +41,7 @@
 #if 0
 static char sccsid[] = "@(#)options.c	8.2 (Berkeley) 4/18/94";
 #else
-static char rcsid[] = "$NetBSD: options.c,v 1.5 1995/03/21 09:07:30 cgd Exp $";
+static char rcsid[] = "$NetBSD: options.c,v 1.6 1996/03/26 23:54:18 mrg Exp $";
 #endif
 #endif /* not lint */
 
@@ -83,6 +83,9 @@ static void cpio_options __P((register int, register char **));
 static void cpio_usage __P((void));
 #endif
 
+#define GZIP_CMD	"gzip"		/* command to run as gzip */
+#define COMPRESS_CMD	"compress"	/* command to run as compress */
+
 /*
  *	Format specific routine table - MUST BE IN SORTED ORDER BY NAME
  *	(see pax.h for description of each function)
@@ -199,7 +202,7 @@ pax_options(argc, argv)
 	/*
 	 * process option flags
 	 */
-	while ((c=getopt(argc,argv,"ab:cdf:iklno:p:rs:tuvwx:B:DE:G:HLPT:U:XYZ"))
+	while ((c=getopt(argc,argv,"ab:cdf:iklno:p:rs:tuvwx:zB:DE:G:HLPT:U:XYZ"))
 	    != EOF) {
 		switch (c) {
 		case 'a':
@@ -383,6 +386,13 @@ pax_options(argc, argv)
 			(void)fputs("\n\n", stderr);
 			pax_usage();
 			break;
+		case 'z':
+			/*
+			 * use gzip.  Non standard option.
+			 */
+			zflag = 1;
+			gzip_program = GZIP_CMD;
+			break;
 		case 'B':
 			/*
 			 * non-standard option on number of bytes written on a
@@ -594,7 +604,7 @@ tar_options(argc, argv)
 	/*
 	 * process option flags
 	 */
-	while ((c = getoldopt(argc, argv, "b:cef:moprutvwxBHLPX014578")) 
+	while ((c = getoldopt(argc, argv, "b:cef:moprutvwxzBHLPXZ014578")) 
 	    != EOF)  {
 		switch(c) {
 		case 'b':
@@ -684,6 +694,13 @@ tar_options(argc, argv)
 			 */
 			act = EXTRACT;
 			break;
+		case 'z':
+			/*
+			 * use gzip.  Non standard option.
+			 */
+			zflag = 1;
+			gzip_program = GZIP_CMD;
+			break;
 		case 'B':
 			/*
 			 * Nothing to do here, this is pax default
@@ -713,6 +730,13 @@ tar_options(argc, argv)
 			 */
 			Xflag = 1;
 			break;
+		case 'Z':
+			/*
+			 * use compress.
+			 */
+			zflag = 1;
+			gzip_program = COMPRESS_CMD;
+			break;
 		case '0':
 			arcname = DEV_0;
 			break;

bin/pax/pax.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: pax.c,v 1.4 1995/03/21 09:07:39 cgd Exp $	*/
+/*	$NetBSD: pax.c,v 1.5 1996/03/26 23:54:20 mrg Exp $	*/
 
 /*-
  * Copyright (c) 1992 Keith Muller.
@@ -47,7 +47,7 @@ static char copyright[] =
 #if 0
 static char sccsid[] = "@(#)pax.c	8.2 (Berkeley) 4/18/94";
 #else
-static char rcsid[] = "$NetBSD: pax.c,v 1.4 1995/03/21 09:07:39 cgd Exp $";
+static char rcsid[] = "$NetBSD: pax.c,v 1.5 1996/03/26 23:54:20 mrg Exp $";
 #endif
 #endif /* not lint */
 
@@ -83,6 +83,7 @@ int	nflag;			/* select first archive member match */
 int	tflag;			/* restore access time after read */
 int	uflag;			/* ignore older modification time files */
 int	vflag;			/* produce verbose output */
+int	zflag;			/* use gzip */
 int	Dflag;			/* same as uflag except inode change time */
 int	Hflag;			/* follow command line symlinks (write only) */
 int	Lflag;			/* follow symlinks when writing */