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, 260 insertions, 0 deletions

diff --git a/tools/cpio/src/oblok.c b/tools/cpio/src/oblok.c
new file mode 100644
index 000000000..38859ba6d
--- /dev/null
+++ b/tools/cpio/src/oblok.c
@@ -0,0 +1,260 @@
+/*
+ * 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 @(#)oblok.c	1.7 (gritter) 7/16/04	*/
+
+#include	<sys/types.h>
+#include	<unistd.h>
+#include	<string.h>
+#include	<errno.h>
+#include	<stdio.h>
+#include	<stdlib.h>
+#include	<malloc.h>
+
+#include	"memalign.h"
+#include	"oblok.h"
+
+struct	list {
+	struct list	*l_nxt;
+	struct oblok	*l_op;
+};
+
+static struct list	*bloks;
+static int	exitset;
+
+int
+ob_clear(void)
+{
+	struct list	*lp;
+	int	val = 0;
+
+	for (lp = bloks; lp; lp = lp->l_nxt) {
+		if (ob_flush(lp->l_op) < 0)
+			val = -1;
+		else if (val >= 0)
+			val++;
+	}
+	return val;
+}
+
+static void
+add(struct oblok *op)
+{
+	struct list	*lp, *lq;
+
+	if ((lp = calloc(1, sizeof *lp)) != NULL) {
+		lp->l_nxt = NULL;
+		lp->l_op = op;
+		if (bloks) {
+			for (lq = bloks; lq->l_nxt; lq = lq->l_nxt);
+			lq->l_nxt = lp;
+		} else
+			bloks = lp;
+		if (exitset == 0) {
+			exitset = 1;
+			atexit((void (*)(void))ob_clear);
+		}
+	}
+}
+
+static void
+del(struct oblok *op)
+{
+	struct list	*lp, *lq = NULL;
+
+	if (bloks) {
+		for (lp = bloks; lp && lp->l_op != op; lp = lp->l_nxt)
+			lq = lp;
+		if (lp) {
+			if (lq)
+				lq->l_nxt = lp->l_nxt;
+			if (lp == bloks)
+				bloks = bloks->l_nxt;
+			free(lp);
+		}
+	}
+}
+
+struct oblok *
+ob_alloc(int fd, enum ob_mode bf)
+{
+	static long	pagesize;
+	struct oblok	*op;
+
+	if (pagesize == 0)
+		if ((pagesize = sysconf(_SC_PAGESIZE)) < 0)
+			pagesize = 4096;
+	if ((op = memalign(pagesize, sizeof *op)) == NULL)
+		return NULL;
+	memset(op, 0, sizeof *op);
+	op->ob_fd = fd;
+	switch (bf) {
+	case OB_EBF:
+		op->ob_bf = isatty(fd) ? OB_LBF : OB_FBF;
+		break;
+	default:
+		op->ob_bf = bf;
+	}
+	add(op);
+	return op;
+}
+
+ssize_t
+ob_free(struct oblok *op)
+{
+	ssize_t	wrt;
+
+	wrt = ob_flush(op);
+	del(op);
+	free(op);
+	return wrt;
+}
+
+static ssize_t
+swrite(int fd, const char *data, size_t sz)
+{
+	ssize_t	wo, wt = 0;
+
+	do {
+		if ((wo = write(fd, data + wt, sz - wt)) < 0) {
+			if (errno == EINTR)
+				continue;
+			else
+				return wt;
+		}
+		wt += wo;
+	} while (wt < sz);
+	return sz;
+}
+
+ssize_t
+ob_write(struct oblok *op, const char *data, size_t sz)
+{
+	ssize_t	wrt;
+	size_t	di, isz;
+
+	switch (op->ob_bf) {
+	case OB_NBF:
+		wrt = swrite(op->ob_fd, data, sz);
+		op->ob_wrt += wrt;
+		if (wrt != sz) {
+			op->ob_bf = OB_EBF;
+			writerr(op, sz, wrt>0?wrt:0);
+			return -1;
+		}
+		return wrt;
+	case OB_LBF:
+	case OB_FBF:
+		isz = sz;
+		while (op->ob_pos + sz > (OBLOK)) {
+			di = (OBLOK) - op->ob_pos;
+			sz -= di;
+			if (op->ob_pos > 0) {
+				memcpy(&op->ob_blk[op->ob_pos], data, di);
+				wrt = swrite(op->ob_fd, op->ob_blk, (OBLOK));
+			} else
+				wrt = swrite(op->ob_fd, data, (OBLOK));
+			op->ob_wrt += wrt;
+			if (wrt != (OBLOK)) {
+				op->ob_bf = OB_EBF;
+				writerr(op, (OBLOK), wrt>0?wrt:0);
+				return -1;
+			}
+			data += di;
+			op->ob_pos = 0;
+		}
+		if (op->ob_bf == OB_LBF) {
+			const char	*cp;
+
+			cp = data;
+			while (cp < &data[sz]) {
+				if (*cp == '\n') {
+					di = cp - data + 1;
+					sz -= di;
+					if (op->ob_pos > 0) {
+						memcpy(&op->ob_blk[op->ob_pos],
+								data, di);
+						wrt = swrite(op->ob_fd,
+							op->ob_blk,
+							op->ob_pos + di);
+					} else
+						wrt = swrite(op->ob_fd,
+							data, di);
+					op->ob_wrt += wrt;
+					if (wrt != op->ob_pos + di) {
+						op->ob_bf = OB_EBF;
+						writerr(op, di, wrt>0?wrt:0);
+						return -1;
+					}
+					op->ob_pos = 0;
+					data += di;
+					cp = data;
+				}
+				cp++;
+			}
+		}
+		if (sz == (OBLOK)) {
+			wrt = swrite(op->ob_fd, data, sz);
+			op->ob_wrt += wrt;
+			if (wrt != sz) {
+				op->ob_bf = OB_EBF;
+				writerr(op, sz, wrt>0?wrt:0);
+				return -1;
+			}
+		} else if (sz) {
+			memcpy(&op->ob_blk[op->ob_pos], data, sz);
+			op->ob_pos += sz;
+		}
+		return isz;
+	case OB_EBF:
+		;
+	}
+	return -1;
+}
+
+ssize_t
+ob_flush(struct oblok *op)
+{
+	ssize_t	wrt = 0;
+
+	if (op->ob_pos) {
+		wrt = swrite(op->ob_fd, op->ob_blk, op->ob_pos);
+		op->ob_wrt += wrt;
+		if (wrt != op->ob_pos) {
+			op->ob_bf = OB_EBF;
+			writerr(op, op->ob_pos, wrt>0?wrt:0);
+			wrt = -1;
+		}
+		op->ob_pos = 0;
+	}
+	return wrt;
+}
+
+int
+ob_chr(int c, struct oblok *op)
+{
+	char	b;
+	ssize_t	wrt;
+
+	b = (char)c;
+	wrt = ob_write(op, &b, 1);
+	return wrt < 0 ? EOF : c;
+}