Initial s390-tools-2.0.0 import

This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
2026-08-05 02:14:52 +00:00 · 2017-08-07 16:13:17 +02:00
commit b627b8d8e1
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+/*
+ * ipl_tools - Linux for System z reipl and shutdown tools
+ *
+ * Command: lsshut
+ *
+ * Copyright IBM Corp. 2008, 2017
+ *
+ * s390-tools is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+
+#include "ipl_tools.h"
+
+static const char *const usage_lsshut =
+"Usage: %s [OPTIONS]\n"
+"\n"
+"Print the shutdown action configuration for Linux on System z.\n"
+"\n"
+"OPTIONS:\n"
+"  -h, --help           Print this help, then exit\n"
+"  -v, --version        Print version information, then exit\n";
+
+static void print_usage_lsshut_exit(void)
+{
+	printf(usage_lsshut, g.prog_name);
+	exit(0);
+}
+
+static void parse_lsshut_options(int argc, char *argv[])
+{
+
+	int opt, idx;
+	const struct option long_opts[] = {
+		{ "help",	 no_argument,		NULL, 'h' },
+		{ "version",	 no_argument,		NULL, 'v' },
+		{ NULL,		 0,			NULL,  0  }
+	};
+
+	while ((opt = getopt_long(argc, argv, "hv", long_opts, &idx)) != -1) {
+		switch (opt) {
+		case 'h':
+			print_usage_lsshut_exit();
+		case 'v':
+			print_version_exit();
+		default:
+			print_help_hint_exit();
+		}
+	}
+	/* don't run with too many arguments */
+	if (optind != argc)
+		ERR_EXIT("Invalid positional parameter \"%s\" specified",
+			 argv[optind]);
+}
+
+/*
+ * VMCMDs can have up to 128 characters. Newlines mark the end of a CP command.
+ * Therefore we can have up to 64 single CP commands (with one character).
+ * With quotes (2) and commas (1) we can have at most 4 * 64 = 256 characters
+ * for the output string.
+ */
+static void read_vmcmd(char *str, const char *path)
+{
+	char buf[128], tmp[512];
+	char *ptr_old, *ptr;
+
+	*str = 0;
+	ptr_old = ptr = buf;
+	read_fw_str(buf, path, sizeof(buf));
+	while ((ptr = strchr(ptr_old, '\n'))) {
+		*ptr = 0;
+		sprintf(tmp, "\"%s\",", ptr_old);
+		strcat(str, tmp);
+		ptr_old = ptr + 1;
+	}
+	sprintf(tmp, "\"%s\"", ptr_old);
+	strcat(str, tmp);
+}
+
+static void print_kdump(void)
+{
+	struct stat sb;
+	char tmp[1024];
+
+	if (stat("/sys/kernel/kexec_crash_loaded", &sb) != 0)
+		return;
+	read_str(tmp, "/sys/kernel/kexec_crash_loaded", sizeof(tmp));
+	if (strncmp(tmp, "1", 1) == 0)
+		printf("kdump,");
+}
+
+static void shutdown_trigger_print(struct shutdown_trigger *trigger)
+{
+	char tmp[1024], cmd[1024], path[PATH_MAX];
+
+	sprintf(path, "shutdown_actions/%s", trigger->name_sysfs);
+
+	printf("%-16s ", trigger->name_print);
+
+	if ((trigger == &shutdown_trigger_panic ||
+	     trigger == &shutdown_trigger_restart))
+		print_kdump();
+	read_fw_str(tmp, path, sizeof(tmp));
+	if (strncmp(tmp, "vmcmd", strlen("vmcmd")) == 0) {
+		sprintf(path, "vmcmd/%s", trigger->name_sysfs);
+		read_vmcmd(cmd, path);
+		printf("vmcmd (%s)\n", cmd);
+	} else {
+		printf("%s\n", tmp);
+	}
+}
+
+void cmd_lsshut(int argc, char *argv[])
+{
+	int i;
+
+	parse_lsshut_options(argc, argv);
+	shutdown_init();
+
+	printf("Trigger          Action\n");
+	printf("========================\n");
+
+	for (i = 0; shutdown_trigger_vec[i]; i++) {
+		if (!shutdown_trigger_vec[i]->available)
+			continue;
+		shutdown_trigger_print(shutdown_trigger_vec[i]);
+	}
+}