Adding upstream version 31+20240202.upstream/31+20240202

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

1 files changed, 277 insertions, 0 deletions

diff --git a/tools/static-nodes.c b/tools/static-nodes.c
new file mode 100644
index 0000000..5ef3743
--- /dev/null
+++ b/tools/static-nodes.c
@@ -0,0 +1,277 @@
+/*
+ * kmod-static-nodes - manage modules.devname
+ *
+ * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2011-2013  ProFUSION embedded systems
+ * Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+
+#include <shared/util.h>
+
+#include "kmod.h"
+
+struct static_nodes_format {
+	const char *name;
+	int (*write)(FILE *, char[], char[], char, unsigned int, unsigned int);
+	const char *description;
+};
+
+static const struct static_nodes_format static_nodes_format_human;
+static const struct static_nodes_format static_nodes_format_tmpfiles;
+static const struct static_nodes_format static_nodes_format_devname;
+
+static const struct static_nodes_format *static_nodes_formats[] = {
+	&static_nodes_format_human,
+	&static_nodes_format_tmpfiles,
+	&static_nodes_format_devname,
+};
+
+static const char cmdopts_s[] = "o:f:h";
+static const struct option cmdopts[] = {
+	{ "output", required_argument, 0, 'o'},
+	{ "format", required_argument, 0, 'f'},
+	{ "help", no_argument, 0, 'h'},
+	{ },
+};
+
+static int write_human(FILE *out, char modname[], char devname[], char type, unsigned int maj, unsigned int min)
+{
+	int ret;
+
+	ret = fprintf(out,
+			"Module: %s\n"
+			"\tDevice node: /dev/%s\n"
+			"\t\tType: %s device\n"
+			"\t\tMajor: %u\n"
+			"\t\tMinor: %u\n",
+			modname, devname,
+			(type == 'c') ? "character" : "block", maj, min);
+	if (ret >= 0)
+		return EXIT_SUCCESS;
+	else
+		return EXIT_FAILURE;
+}
+
+static const struct static_nodes_format static_nodes_format_human = {
+	.name = "human",
+	.write = write_human,
+	.description = "(default) a human readable format. Do not parse.",
+};
+
+static int write_tmpfiles(FILE *out, char modname[], char devname[], char type, unsigned int maj, unsigned int min)
+{
+	const char *dir;
+	int ret;
+
+	dir = strrchr(devname, '/');
+	if (dir) {
+		ret = fprintf(out, "d /dev/%.*s 0755 - - -\n",
+			      (int)(dir - devname), devname);
+		if (ret < 0)
+			return EXIT_FAILURE;
+	}
+
+	ret = fprintf(out, "%c! /dev/%s 0600 - - - %u:%u\n",
+		      type, devname, maj, min);
+	if (ret < 0)
+		return EXIT_FAILURE;
+
+	return EXIT_SUCCESS;
+}
+
+static const struct static_nodes_format static_nodes_format_tmpfiles = {
+	.name = "tmpfiles",
+	.write = write_tmpfiles,
+	.description = "the tmpfiles.d(5) format used by systemd-tmpfiles.",
+};
+
+static int write_devname(FILE *out, char modname[], char devname[], char type, unsigned int maj, unsigned int min)
+{
+	int ret;
+
+	ret = fprintf(out, "%s %s %c%u:%u\n", modname, devname, type, maj, min);
+	if (ret >= 0)
+		return EXIT_SUCCESS;
+	else
+		return EXIT_FAILURE;
+}
+
+static const struct static_nodes_format static_nodes_format_devname = {
+	.name = "devname",
+	.write = write_devname,
+	.description = "the modules.devname format.",
+};
+
+static void help(void)
+{
+	size_t i;
+
+	printf("Usage:\n"
+	       "\t%s static-nodes [options]\n"
+	       "\n"
+	       "kmod static-nodes outputs the static-node information of the currently running kernel.\n"
+	       "\n"
+	       "Options:\n"
+	       "\t-f, --format=FORMAT  choose format to use: see \"Formats\"\n"
+	       "\t-o, --output=FILE    write output to file\n"
+	       "\t-h, --help           show this help\n"
+	       "\n"
+	       "Formats:\n",
+	 program_invocation_short_name);
+
+	for (i = 0; i < ARRAY_SIZE(static_nodes_formats); i++) {
+		if (static_nodes_formats[i]->description != NULL) {
+			printf("\t%-12s %s\n", static_nodes_formats[i]->name,
+			       static_nodes_formats[i]->description);
+		}
+	}
+}
+
+static int do_static_nodes(int argc, char *argv[])
+{
+	struct utsname kernel;
+	char modules[PATH_MAX], buf[4096];
+	const char *output = "/dev/stdout";
+	FILE *in = NULL, *out = NULL;
+	const struct static_nodes_format *format = &static_nodes_format_human;
+	int r, ret = EXIT_SUCCESS;
+
+	for (;;) {
+		int c, idx = 0, valid;
+		size_t i;
+
+		c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
+		if (c == -1) {
+			break;
+		}
+		switch (c) {
+		case 'o':
+			output = optarg;
+			break;
+		case 'f':
+			valid = 0;
+
+			for (i = 0; i < ARRAY_SIZE(static_nodes_formats); i++) {
+				if (streq(static_nodes_formats[i]->name, optarg)) {
+					format = static_nodes_formats[i];
+					valid = 1;
+				}
+			}
+
+			if (!valid) {
+				fprintf(stderr, "Unknown format: '%s'.\n",
+					optarg);
+				help();
+				ret = EXIT_FAILURE;
+				goto finish;
+			}
+			break;
+		case 'h':
+			help();
+			goto finish;
+		case '?':
+			ret = EXIT_FAILURE;
+			goto finish;
+		default:
+			fprintf(stderr, "Unexpected commandline option '%c'.\n",
+				c);
+			help();
+			ret = EXIT_FAILURE;
+			goto finish;
+		}
+	}
+
+	if (uname(&kernel) < 0) {
+		fputs("Error: uname failed!\n", stderr);
+		ret = EXIT_FAILURE;
+		goto finish;
+	}
+
+	snprintf(modules, sizeof(modules), MODULE_DIRECTORY "/%s/modules.devname", kernel.release);
+	in = fopen(modules, "re");
+	if (in == NULL) {
+		if (errno == ENOENT) {
+			fprintf(stderr, "Warning: " MODULE_DIRECTORY "/%s/modules.devname not found - ignoring\n",
+				kernel.release);
+			ret = EXIT_SUCCESS;
+		} else {
+			fprintf(stderr, "Error: could not open " MODULE_DIRECTORY "/%s/modules.devname - %m\n",
+				kernel.release);
+			ret = EXIT_FAILURE;
+		}
+		goto finish;
+	}
+
+	r = mkdir_parents(output, 0755);
+	if (r < 0) {
+		fprintf(stderr, "Error: could not create parent directory for %s - %m.\n", output);
+		ret = EXIT_FAILURE;
+		goto finish;
+	}
+
+	out = fopen(output, "we");
+	if (out == NULL) {
+		fprintf(stderr, "Error: could not create %s - %m\n", output);
+		ret = EXIT_FAILURE;
+		goto finish;
+	}
+
+	while (fgets(buf, sizeof(buf), in) != NULL) {
+		char modname[PATH_MAX];
+		char devname[PATH_MAX];
+		char type;
+		unsigned int maj, min;
+		int matches;
+
+		if (buf[0] == '#')
+			continue;
+
+		matches = sscanf(buf, "%s %s %c%u:%u", modname, devname,
+				 &type, &maj, &min);
+		if (matches != 5 || (type != 'c' && type != 'b')) {
+			fprintf(stderr, "Error: invalid devname entry: %s", buf);
+			ret = EXIT_FAILURE;
+			continue;
+		}
+
+		format->write(out, modname, devname, type, maj, min);
+	}
+
+finish:
+	if (in)
+		fclose(in);
+	if (out)
+		fclose(out);
+	return ret;
+}
+
+const struct kmod_cmd kmod_cmd_static_nodes = {
+	.name = "static-nodes",
+	.cmd = do_static_nodes,
+	.help = "outputs the static-node information installed with the currently running kernel",
+};