From 378c18e5f024ac5a8aef4cb40d7c9aa9633d144c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 16:30:35 +0200
Subject: Adding upstream version 2.38.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 disk-utils/isosize.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 disk-utils/isosize.c

(limited to 'disk-utils/isosize.c')

diff --git a/disk-utils/isosize.c b/disk-utils/isosize.c
new file mode 100644
index 0000000..9299663
--- /dev/null
+++ b/disk-utils/isosize.c
@@ -0,0 +1,167 @@
+/*
+ * isosize.c - Andries Brouwer, 000608
+ *
+ * use header info to find size of iso9660 file system
+ * output a number - useful in scripts
+ *
+ * Synopsis:
+ *    isosize [-x] [-d <num>] <filename>
+ *        where "-x" gives length in sectors and sector size while
+ *              without this argument the size is given in bytes
+ *        without "-x" gives length in bytes unless "-d <num>" is
+ *		given. In the latter case the length in bytes divided
+ *		by <num> is given
+ *
+ *  Version 2.03 2000/12/21
+ *     - add "-d <num>" option and use long long to fix things > 2 GB
+ *  Version 2.02 2000/10/11
+ *     - error messages on IO failures [D. Gilbert]
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "nls.h"
+#include "c.h"
+#include "strutils.h"
+#include "closestream.h"
+#include "iso9660.h"
+
+#define ISOSIZE_EXIT_ALLFAILED	32
+#define ISOSIZE_EXIT_SOMEOK	64
+
+static int is_iso(int fd)
+{
+	char label[8];
+
+	if (pread(fd, &label, 8, 0x8000) == -1)
+		return 1;
+	return memcmp(&label, &"\1CD001\1", 8);
+}
+
+static int isosize(int argc, char *filenamep, int xflag, long divisor)
+{
+	int fd, nsecs, ssize, rc = -1;
+	unsigned char volume_space_size[8];
+	unsigned char logical_block_size[4];
+
+	if ((fd = open(filenamep, O_RDONLY)) < 0) {
+		warn(_("cannot open %s"), filenamep);
+		goto done;
+	}
+	if (is_iso(fd))
+		warnx(_("%s: might not be an ISO filesystem"), filenamep);
+
+	if (pread(fd, volume_space_size, sizeof(volume_space_size), 0x8050) != sizeof(volume_space_size) ||
+	    pread(fd, logical_block_size, sizeof(logical_block_size), 0x8080) != sizeof(logical_block_size)) {
+		if (errno)
+			warn(_("read error on %s"), filenamep);
+		else
+			warnx(_("read error on %s"), filenamep);
+		goto done;
+	}
+
+	nsecs = isonum_733(volume_space_size, xflag);
+	/* isonum_723 returns nowadays always 2048 */
+	ssize = isonum_723(logical_block_size, xflag);
+
+	if (1 < argc)
+		printf("%s: ", filenamep);
+	if (xflag)
+		printf(_("sector count: %d, sector size: %d\n"), nsecs, ssize);
+	else {
+		long long product = nsecs;
+
+		if (divisor == 0)
+			printf("%lld\n", product * ssize);
+		else if (divisor == ssize)
+			printf("%d\n", nsecs);
+		else
+			printf("%lld\n", (product * ssize) / divisor);
+	}
+
+	rc = 0;
+done:
+	if (fd >= 0)
+		close(fd);
+	return rc;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+
+	fputs(USAGE_HEADER, stdout);
+	fprintf(stdout,
+		_(" %s [options] <iso9660_image_file> ...\n"),
+		program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, stdout);
+	fputs(_("Show the length of an ISO-9660 filesystem.\n"), stdout);
+
+	fputs(USAGE_OPTIONS, stdout);
+	fputs(_(" -d, --divisor=<number>  divide the amount of bytes by <number>\n"), stdout);
+	fputs(_(" -x, --sectors           show sector count and size\n"), stdout);
+
+	printf(USAGE_HELP_OPTIONS(25));
+	printf(USAGE_MAN_TAIL("isosize(8)"));
+
+	exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+	int j, ct_err = 0, ct, opt, xflag = 0;
+	long divisor = 0;
+
+	static const struct option longopts[] = {
+		{"divisor", required_argument, NULL, 'd'},
+		{"sectors", no_argument,       NULL, 'x'},
+		{"version", no_argument,       NULL, 'V'},
+		{"help",    no_argument,       NULL, 'h'},
+		{NULL, 0, NULL, 0}
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	while ((opt = getopt_long(argc, argv, "d:xVh", longopts, NULL)) != -1) {
+		switch (opt) {
+		case 'd':
+			divisor =
+			    strtol_or_err(optarg,
+					  _("invalid divisor argument"));
+			break;
+		case 'x':
+			xflag = 1;
+			break;
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	ct = argc - optind;
+
+	if (ct <= 0) {
+		warnx(_("no device specified"));
+		errtryhelp(EXIT_FAILURE);
+	}
+
+	for (j = optind; j < argc; j++) {
+		if (isosize(ct, argv[j], xflag, divisor) != 0)
+			ct_err++;
+	}
+
+	return	ct == ct_err	? ISOSIZE_EXIT_ALLFAILED :	/* all failed */
+		ct_err		? ISOSIZE_EXIT_SOMEOK :		/* some ok */
+		EXIT_SUCCESS;					/* all success */
+}
-- 
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