add a cpio implementation to tools directory

cpio utility is a mess in point of portability.
For example NetBSD cpio implementation does not support
userid and groupid changes for the archive. This
feature is required for initramfs filesystem targets.
This cpio is from the Heirloom project.

Fix needed rebuild of tools, when changing targets.

1 files changed, 193 insertions, 0 deletions

diff --git a/tools/cpio/src/expand.c b/tools/cpio/src/expand.c
new file mode 100644
index 000000000..5a5233f3e
--- /dev/null
+++ b/tools/cpio/src/expand.c
@@ -0,0 +1,193 @@
+/*
+ * cpio - copy file archives in and out
+ *
+ * Gunnar Ritter, Freiburg i. Br., Germany, April 2003.
+ */
+/*
+ * Copyright (c) 2003 Gunnar Ritter
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute
+ * it freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source distribution.
+ */
+
+/*	Sccsid @(#)expand.c	1.6 (gritter) 12/15/03	*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "cpio.h"
+
+#define	DLE	144
+
+static void
+zexread(char *data, size_t size, int doswap)
+{
+	if (bread(data, size) != size)
+		unexeoa();
+	if (doswap)
+		swap(data, size, bflag || sflag, bflag || Sflag);
+}
+
+#define	nextbyte()	( \
+	ipos >= sizeof ibuf && isize > 0 ? ( \
+		zexread(ibuf, isize>sizeof ibuf?sizeof ibuf:isize, doswap), \
+		ipos = 0 \
+	) : 0, \
+	isize--, \
+	ibuf[ipos++] & 0377 \
+)
+
+#define	nextbit()	( \
+	ibit = ibit >= 7 ? (ibyte = nextbyte(), 0) : ibit + 1, \
+	isize < 0 ? (ieof = 1, -1) : (ibyte & (1<<ibit)) >> ibit \
+)
+
+#define	sixbits(n)	{ \
+	int	t; \
+	(n) = 0; \
+	for (t = 0; t < 6; t++) \
+		(n) |= nextbit() << t; \
+}
+
+#define	eightbits(n)	{ \
+	int	t; \
+	(n) = 0; \
+	for (t = 0; t < 8; t++) \
+		(n) |= nextbit() << t; \
+}
+
+static void
+zexwrite(int *tfd, char *data, size_t size, uint32_t *crc, int *val,
+		const char *tgt, long long *nsize)
+{
+	if (size) {
+		if (size > *nsize)
+			size = *nsize;
+		if (*tfd >= 0 && write(*tfd, data, size) != size) {
+			emsg(3, "Cannot write \"%s\"", tgt);
+			*tfd = -1;
+			*val = -1;
+		}
+		*crc = zipcrc(*crc, (unsigned char *)data, size);
+		*nsize -= size;
+	}
+}
+
+#define	wadd(c)		( \
+	wpos >= sizeof wbuf ? ( \
+		zexwrite(&tfd, wbuf, sizeof wbuf, crc, &val, tgt, &nsize), \
+		wpos = 0 \
+	) : 0, \
+	wsize++, \
+	wbuf[wpos++] = (c) \
+)
+
+#define	zex_L(x)	( \
+	f->f_cmethod == C_REDUCED1 ? (x) & 0177 : \
+	f->f_cmethod == C_REDUCED2 ? (x) & 077 : \
+	f->f_cmethod == C_REDUCED3 ? (x) & 037 : \
+	/* f->f_cmethod == C_REDUCED4 */ (x) & 017 \
+)
+
+#define	zex_F(x)	( \
+	f->f_cmethod == C_REDUCED1 ? (x) == 0177 ? 2 : 3 : \
+	f->f_cmethod == C_REDUCED2 ? (x) == 077 ? 2 : 3 : \
+	f->f_cmethod == C_REDUCED3 ? (x) == 037 ? 2 : 3 : \
+	/* f->f_cmethod == C_REDUCED4 */ (x) == 017 ? 2 : 3 \
+)
+
+#define	zex_D(x, y)	( \
+	f->f_cmethod == C_REDUCED1 ? (((x)&0200)>>7) * 0400 + (y) + 1 : \
+	f->f_cmethod == C_REDUCED2 ? (((x)&0300)>>6) * 0400 + (y) + 1 : \
+	f->f_cmethod == C_REDUCED3 ? (((x)&0340)>>5) * 0400 + (y) + 1 : \
+	/* f->f_cmethod == C_REDUCED4 */ (((x)&0360)>>4) * 0400 + (y) + 1 \
+)
+
+int
+zipexpand(struct file *f, const char *tgt, int tfd, int doswap, uint32_t *crc)
+{
+	char	fset[256][33];
+	char	ibuf[4096], ibyte = 0, wbuf[8192];
+	long	ipos = sizeof ibuf, wpos = 0, isize = f->f_csize, wsize = 0;
+	int	val = 0, ieof = 0;
+	int	c = 0, i, j, k, n, ibit = 7, lastc, state, v = 0, len = 0;
+	long long	nsize = f->f_st.st_size;
+
+	*crc = 0;
+	memset(fset, 0, sizeof fset);
+	for (j = 255; j >= 0; j--) {
+		sixbits(n);
+		for (i = 0; i < n; i++) {
+			eightbits(fset[j][i]);
+		}
+		fset[j][32] = n<1?0:n<3?1:n<5?2:n<9?3:n<17?4:n<37?5:n<65?6:7;
+	}
+	lastc = 0;
+	state = 0;
+	while (ieof == 0) {
+		if (fset[lastc][32] == 0) {
+			eightbits(c);
+		} else {
+			if (nextbit() != 0) {
+				eightbits(c);
+			} else {
+				i = 0;
+				for (k = 0; k < fset[lastc][32]; k++)
+					i |= nextbit() << k;
+				c = fset[lastc][i] & 0377;
+			}
+		}
+		lastc = c;
+		switch (state) {
+		case 0:
+			if (c != DLE)
+				wadd(c);
+			else
+				state = 1;
+			break;
+		case 1:
+			if (c != 0) {
+				v = c;
+				len = zex_L(v);
+				state = zex_F(len);
+			} else {
+				wadd(DLE);
+				state = 0;
+			}
+			break;
+		case 2:
+			len += c;
+			state = 3;
+			break;
+		case 3:
+			n = wsize - zex_D(v, c);
+			for (i = 0; i < len + 3; i++) {
+				c = n+i >= 0 ? wbuf[n+i&sizeof wbuf-1]&0377 : 0;
+				wadd(c);
+			}
+			state = 0;
+		}
+	}
+	zexwrite(&tfd, wbuf, wpos, crc, &val, tgt, &nsize);
+	while (isize >= 0)
+		nextbyte();
+	return val;
+}