Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 276 insertions, 0 deletions

diff --git a/disk-utils/raw.c b/disk-utils/raw.c
new file mode 100644
index 0000000..b44a581
--- /dev/null
+++ b/disk-utils/raw.c
@@ -0,0 +1,276 @@
+/*
+ * raw.c: User mode tool to bind and query raw character devices.
+ *
+ * Stephen Tweedie, 1999, 2000
+ *
+ * This file may be redistributed under the terms of the GNU General
+ * Public License, version 2.
+ *
+ * Copyright Red Hat Software, 1999, 2000
+ *
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <linux/major.h>
+#include <linux/raw.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "c.h"
+#include "closestream.h"
+#include "nls.h"
+#include "pathnames.h"
+
+#define EXIT_RAW_ACCESS 3
+#define EXIT_RAW_IOCTL 4
+
+#define RAW_NR_MINORS 8192
+
+static int do_query;
+static int do_query_all;
+
+static int master_fd;
+static int raw_minor;
+
+void open_raw_ctl(void);
+static int query(int minor_raw, const char *raw_name, int quiet);
+static int bind(int minor_raw, int block_major, int block_minor);
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out,
+		_(" %1$s %2$srawN <major> <minor>\n"
+		  " %1$s %2$srawN /dev/<blockdevice>\n"
+		  " %1$s -q %2$srawN\n"
+		  " %1$s -qa\n"), program_invocation_short_name,
+		_PATH_RAWDEVDIR);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Bind a raw character device to a block device.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -q, --query    set query mode\n"), out);
+	fputs(_(" -a, --all      query all raw devices\n"), out);
+	printf(USAGE_HELP_OPTIONS(16));
+	printf(USAGE_MAN_TAIL("raw(8)"));
+	exit(EXIT_SUCCESS);
+}
+
+static long strtol_octal_or_err(const char *str, const char *errmesg)
+{
+	long num;
+	char *end = NULL;
+
+	if (str == NULL || *str == '\0')
+		goto err;
+	errno = 0;
+	num = strtol(str, &end, 0);
+
+	if (errno || str == end || (end && *end))
+		goto err;
+
+	return num;
+ err:
+	if (errno)
+		err(EXIT_FAILURE, "%s: '%s'", errmesg, str);
+	else
+		errx(EXIT_FAILURE, "%s: '%s'", errmesg, str);
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int c;
+	char *raw_name;
+	char *block_name;
+	int retval;
+	int block_major, block_minor;
+	int i, rc;
+
+	struct stat statbuf;
+
+	static const struct option longopts[] = {
+		{"query",   no_argument, NULL, 'q'},
+		{"all",     no_argument, NULL, 'a'},
+		{"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 ((c = getopt_long(argc, argv, "qaVh", longopts, NULL)) != -1)
+		switch (c) {
+		case 'q':
+			do_query = 1;
+			break;
+		case 'a':
+			do_query_all = 1;
+			break;
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+
+	/*
+	 * Check for, and open, the master raw device, /dev/raw
+	 */
+	open_raw_ctl();
+
+	if (do_query_all) {
+		if (optind < argc) {
+			warnx(_("bad usage"));
+			errtryhelp(EXIT_FAILURE);
+		}
+		for (i = 1; i < RAW_NR_MINORS; i++)
+			query(i, NULL, 1);
+		exit(EXIT_SUCCESS);
+	}
+
+	/*
+	 * It's a bind or a single query.  Either way we need a raw device.
+	 */
+
+	if (optind >= argc) {
+		warnx(_("bad usage"));
+		errtryhelp(EXIT_FAILURE);
+	}
+	raw_name = argv[optind++];
+
+	/*
+	 * try to check the device name before stat(), because on systems with
+	 * udev the raw0 causes a create udev event for char 162/0, which
+	 * causes udev to *remove* /dev/rawctl
+	 */
+	rc = sscanf(raw_name, _PATH_RAWDEVDIR "raw%d", &raw_minor);
+	if (rc != 1) {
+		warnx(_("bad usage"));
+		errtryhelp(EXIT_FAILURE);
+	}
+	if (raw_minor == 0)
+		errx(EXIT_RAW_ACCESS,
+		     _("Device '%s' is the control raw device "
+		       "(use raw<N> where <N> is greater than zero)"),
+		     raw_name);
+
+	if (do_query)
+		return query(raw_minor, raw_name, 0);
+
+	/*
+	 * It's not a query, so we still have some parsing to do.  Have we been
+	 * given a block device filename or a major/minor pair?
+	 */
+	switch (argc - optind) {
+	case 1:
+		block_name = argv[optind];
+		retval = stat(block_name, &statbuf);
+		if (retval)
+			err(EXIT_RAW_ACCESS,
+			    _("Cannot locate block device '%s'"), block_name);
+		if (!S_ISBLK(statbuf.st_mode))
+			errx(EXIT_RAW_ACCESS,
+			     _("Device '%s' is not a block device"),
+			     block_name);
+		block_major = major(statbuf.st_rdev);
+		block_minor = minor(statbuf.st_rdev);
+		break;
+
+	case 2:
+		block_major =
+		    strtol_octal_or_err(argv[optind],
+					_("failed to parse argument"));
+		block_minor =
+		    strtol_octal_or_err(argv[optind + 1],
+					_("failed to parse argument"));
+		break;
+
+	default:
+		warnx(_("bad usage"));
+		errtryhelp(EXIT_FAILURE);
+	}
+
+	return bind(raw_minor, block_major, block_minor);
+}
+
+void open_raw_ctl(void)
+{
+	master_fd = open(_PATH_RAWDEVCTL, O_RDWR, 0);
+	if (master_fd < 0) {
+		master_fd = open(_PATH_RAWDEVCTL_OLD, O_RDWR, 0);
+		if (master_fd < 0)
+			err(EXIT_RAW_ACCESS,
+			    _("Cannot open master raw device '%s'"),
+			    _PATH_RAWDEVCTL);
+	}
+}
+
+static int query(int minor_raw, const char *raw_name, int quiet)
+{
+	struct raw_config_request rq;
+	static int has_worked = 0;
+
+	if (raw_name) {
+		struct stat statbuf;
+
+		if (stat(raw_name, &statbuf) != 0)
+			err(EXIT_RAW_ACCESS,
+			    _("Cannot locate raw device '%s'"), raw_name);
+		if (!S_ISCHR(statbuf.st_mode))
+			errx(EXIT_RAW_ACCESS,
+			     _("Raw device '%s' is not a character dev"),
+			     raw_name);
+		if (major(statbuf.st_rdev) != RAW_MAJOR)
+			errx(EXIT_RAW_ACCESS,
+			     _("Device '%s' is not a raw dev"), raw_name);
+		minor_raw = minor(statbuf.st_rdev);
+	}
+
+	rq.raw_minor = minor_raw;
+	if (ioctl(master_fd, RAW_GETBIND, &rq) < 0) {
+		if (quiet && errno == ENODEV)
+			return 3;
+		if (has_worked && errno == EINVAL)
+			return 0;
+		err(EXIT_RAW_IOCTL, _("Error querying raw device"));
+	}
+
+	/* If one query has worked, mark that fact so that we don't report
+	 * spurious fatal errors if raw(8) has been built to support more raw
+	 * minor numbers than the kernel has. */
+	has_worked = 1;
+	if (quiet && !rq.block_major && !rq.block_minor)
+		return 0;
+	printf(_("%sraw%d:  bound to major %d, minor %d\n"),
+	       _PATH_RAWDEVDIR, minor_raw, (int)rq.block_major,
+	       (int)rq.block_minor);
+	return 0;
+}
+
+static int bind(int minor_raw, int block_major, int block_minor)
+{
+	struct raw_config_request rq;
+
+	rq.raw_minor = minor_raw;
+	rq.block_major = block_major;
+	rq.block_minor = block_minor;
+	if (ioctl(master_fd, RAW_SETBIND, &rq) < 0)
+		err(EXIT_RAW_IOCTL, _("Error setting raw device"));
+	printf(_("%sraw%d:  bound to major %d, minor %d\n"),
+	       _PATH_RAWDEVDIR, raw_minor, (int)rq.block_major,
+	       (int)rq.block_minor);
+	return 0;
+}