Add 'corebinutils/dd/' from commit '54a575952b5661c61d14538277d3548ca939b342'

git-subtree-dir: corebinutils/dd
git-subtree-mainline: c800ffec456be2f8f346a3a3f50e1e5fa6ee2f0e
git-subtree-split: 54a575952b5661c61d14538277d3548ca939b342

1 files changed, 255 insertions, 0 deletions

diff --git a/corebinutils/dd/misc.c b/corebinutils/dd/misc.c
new file mode 100644
index 0000000000..000c37c18e
--- /dev/null
+++ b/corebinutils/dd/misc.c
@@ -0,0 +1,255 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Copyright (c) 2026
+ *	Project Tick. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Keith Muller of the University of California, San Diego and Lance
+ * Visser of Convex Computer Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdatomic.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "dd.h"
+#include "extern.h"
+
+static void format_scaled(char *, size_t, double, unsigned int,
+    const char *const *);
+
+static void
+format_scaled(char *buf, size_t bufsz, double value, unsigned int base,
+    const char *const *units)
+{
+	size_t unit;
+	double scaled;
+
+	scaled = value;
+	unit = 0;
+	while (scaled >= base && units[unit + 1] != NULL) {
+		scaled /= base;
+		unit++;
+	}
+	if (unit == 0)
+		(void)snprintf(buf, bufsz, "%.0f %s", scaled, units[unit]);
+	else if (scaled >= 10.0)
+		(void)snprintf(buf, bufsz, "%.0f %s", scaled, units[unit]);
+	else
+		(void)snprintf(buf, bufsz, "%.1f %s", scaled, units[unit]);
+}
+
+double
+secs_elapsed(void)
+{
+	struct timespec end, ts_res;
+	double secs, res;
+
+	if (clock_gettime(CLOCK_MONOTONIC, &end))
+		err(1, "clock_gettime");
+	if (clock_getres(CLOCK_MONOTONIC, &ts_res))
+		err(1, "clock_getres");
+	secs = (end.tv_sec - st.start.tv_sec) + \
+	       (end.tv_nsec - st.start.tv_nsec) * 1e-9;
+	res = ts_res.tv_sec + ts_res.tv_nsec * 1e-9;
+	if (secs < res)
+		secs = res;
+
+	return (secs);
+}
+
+int
+summary_signal_number(void)
+{
+#ifdef SIGINFO
+	return (SIGINFO);
+#else
+	return (SIGUSR1);
+#endif
+}
+
+const char *
+summary_signal_name(void)
+{
+#ifdef SIGINFO
+	return ("SIGINFO");
+#else
+	return ("SIGUSR1");
+#endif
+}
+
+void
+summary(void)
+{
+	double secs;
+
+	if (ddflags & C_NOINFO)
+		return;
+
+	if (ddflags & C_PROGRESS)
+		fprintf(stderr, "\n");
+
+	secs = secs_elapsed();
+
+	(void)fprintf(stderr,
+	    "%ju+%ju records in\n%ju+%ju records out\n",
+	    st.in_full, st.in_part, st.out_full, st.out_part);
+	if (st.swab)
+		(void)fprintf(stderr, "%ju odd length swab %s\n",
+		     st.swab, (st.swab == 1) ? "block" : "blocks");
+	if (st.trunc)
+		(void)fprintf(stderr, "%ju truncated %s\n",
+		     st.trunc, (st.trunc == 1) ? "block" : "blocks");
+	if (!(ddflags & C_NOXFER)) {
+		(void)fprintf(stderr,
+		    "%ju bytes transferred in %.6f secs (%.0f bytes/sec)\n",
+		    st.bytes, secs, st.bytes / secs);
+	}
+	need_summary = 0;
+}
+
+void
+progress(void)
+{
+	static int outlen;
+	static const char *const si_units[] = {
+		"B", "kB", "MB", "GB", "TB", "PB", "EB", NULL
+	};
+	static const char *const iec_units[] = {
+		"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", NULL
+	};
+	char buf[160];
+	char iec[16];
+	double secs;
+	char persec[16];
+	char si[16];
+
+	secs = secs_elapsed();
+	format_scaled(si, sizeof(si), (double)st.bytes, 1000, si_units);
+	format_scaled(iec, sizeof(iec), (double)st.bytes, 1024, iec_units);
+	format_scaled(persec, sizeof(persec), st.bytes / secs, 1000, si_units);
+	(void)snprintf(buf, sizeof(buf),
+	    "  %ju bytes (%s, %s) transferred %.3fs, %s/s",
+	    (uintmax_t)st.bytes, si, iec, secs, persec);
+	outlen = fprintf(stderr, "%-*s\r", outlen, buf) - 1;
+	fflush(stderr);
+	need_progress = 0;
+}
+
+/* ARGSUSED */
+void
+siginfo_handler(int signo __unused)
+{
+
+	need_summary = 1;
+}
+
+/* ARGSUSED */
+void
+sigalarm_handler(int signo __unused)
+{
+
+	need_progress = 1;
+}
+
+void
+service_pending_signals(void)
+{
+	if (need_summary)
+		summary();
+	if (need_progress)
+		progress();
+}
+
+static void terminate(int signo) __dead2;
+static void
+terminate(int signo)
+{
+	kill_signal = signo;
+	summary();
+	(void)fflush(stderr);
+	raise(kill_signal);
+	/* NOT REACHED */
+	_exit(1);
+}
+
+static sig_atomic_t in_io = 0;
+static sig_atomic_t sigint_seen = 0;
+
+static void
+sigint_handler(int signo __unused)
+{
+	atomic_signal_fence(memory_order_acquire);
+	if (in_io)
+		terminate(SIGINT);
+	sigint_seen = 1;
+}
+
+void
+prepare_io(void)
+{
+	struct sigaction sa;
+	int error;
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_flags = SA_NODEFER | SA_RESETHAND;
+	sa.sa_handler = sigint_handler;
+	error = sigaction(SIGINT, &sa, 0);
+	if (error != 0)
+		err(1, "sigaction");
+}
+
+void
+before_io(void)
+{
+	in_io = 1;
+	atomic_signal_fence(memory_order_seq_cst);
+	if (sigint_seen)
+		terminate(SIGINT);
+}
+
+void
+after_io(void)
+{
+	in_io = 0;
+	atomic_signal_fence(memory_order_seq_cst);
+	if (sigint_seen)
+		terminate(SIGINT);
+}