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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+/*
+ * zgetdump - Tool for copying and converting System z dumps
+ *
+ * Main functions
+ *
+ * Copyright IBM Corp. 2001, 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 <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <linux/fs.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mtio.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "zgetdump.h"
+
+/*
+ * Globals
+ */
+struct zgetdump_globals g;
+
+/*
+ * Signal handler for exiting zgetdump (the atexit handler will do the work)
+ */
+static void sig_exit(int sig)
+{
+	(void) sig;
+
+	STDERR("\n"); /* E.g. to get newline after '^C' */
+	ERR_EXIT("Got signal %i, exiting...", sig);
+}
+
+/*
+ * Install signal handler
+ */
+static void sig_handler_init(void)
+{
+	struct sigaction sigact;
+
+	/* Ignore signals SIGUSR1 and SIGUSR2 */
+	if (sigemptyset(&sigact.sa_mask) < 0)
+		goto fail;
+	sigact.sa_handler = SIG_IGN;
+	if (sigaction(SIGUSR1, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGUSR2, &sigact, NULL) < 0)
+		goto fail;
+
+	/* Exit on SIGINT, SIGTERM, SIGHUP, ... */
+	if (sigemptyset(&sigact.sa_mask) < 0)
+		goto fail;
+	sigact.sa_handler = sig_exit;
+	if (sigaction(SIGINT, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGTERM, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGHUP, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGQUIT, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGALRM, &sigact, NULL) < 0)
+		goto fail;
+	if (sigaction(SIGPIPE, &sigact, NULL) < 0)
+		goto fail;
+	return;
+fail:
+	ERR_EXIT_ERRNO("Could not initialize signal handler");
+}
+
+/*
+ * Check if dump contains kdump dump and production system dump
+ */
+static void kdump_select_check(void)
+{
+	static char *msg =
+		"The dump contains \"kdump\" and \"production system\"\n"
+		"          Access \"production system\" with \"-s prod\"\n"
+		"          Access \"kdump\" with \"-s kdump\"\n"
+		"          Access the complete dump with \"-s all\"\n"
+		"          Send both dumps to your service organization";
+
+	if (g.opts.select_specified)
+		return;
+	if (!dfi_kdump_base())
+		return;
+	ERR_EXIT("%s", msg);
+}
+
+/*
+ * Run "--umount" action
+ */
+static int do_umount(void)
+{
+	zfuse_umount();
+	return 0;
+}
+
+/*
+ * Run "--device" action
+ */
+static int do_device_info(void)
+{
+	dt_init();
+	dt_info_print();
+	return 0;
+}
+
+/*
+ * Run "--info" action
+ */
+static int do_dump_info(void)
+{
+	if (dfi_init() != 0) {
+		dfi_info_print();
+		STDERR("\nERROR: Dump is not complete\n");
+		zg_exit(1);
+	}
+	kdump_select_check();
+	dfi_info_print();
+	dfi_exit();
+	return 0;
+}
+
+/*
+ * Run "--mount" action
+ */
+static int do_mount(void)
+{
+	int rc;
+
+	if (dfi_init() != 0)
+		ERR_EXIT("Dump cannot be processed (is not complete)");
+	dfo_init();
+	kdump_select_check();
+	rc = zfuse_mount_dump();
+	dfi_exit();
+	return rc;
+}
+
+/*
+ * Run "copy to stdout" action
+ */
+static int do_stdout(void)
+{
+	int rc;
+
+	if (dfi_init() != 0)
+		ERR_EXIT("Dump cannot be processed (is not complete)");
+	dfo_init();
+	kdump_select_check();
+	rc = stdout_write_dump();
+	dfi_exit();
+	return rc;
+}
+
+/*
+ * The zgetdump main function
+ */
+int main(int argc, char *argv[])
+{
+	sig_handler_init();
+	opts_parse(argc, argv);
+
+	switch (g.opts.action) {
+	case ZG_ACTION_STDOUT:
+		return do_stdout();
+	case ZG_ACTION_DUMP_INFO:
+		return do_dump_info();
+	case ZG_ACTION_DEVICE_INFO:
+		return do_device_info();
+	case ZG_ACTION_MOUNT:
+		return do_mount();
+	case ZG_ACTION_UMOUNT:
+		return do_umount();
+	}
+	ABORT("Invalid action: %i", g.opts.action);
+}