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In many files there are header comments that contain an Author: statement, supposedly reflecting who originally wrote the code. In a large collaborative project like libvirt, any non-trivial file will have been modified by a large number of different contributors. IOW, the Author: comments are quickly out of date, omitting people who have made significant contribitions. In some places Author: lines have been added despite the person merely being responsible for creating the file by moving existing code out of another file. IOW, the Author: lines give an incorrect record of authorship. With this all in mind, the comments are useless as a means to identify who to talk to about code in a particular file. Contributors will always be better off using 'git log' and 'git blame' if they need to find the author of a particular bit of code. This commit thus deletes all Author: comments from the source and adds a rule to prevent them reappearing. The Copyright headers are similarly misleading and inaccurate, however, we cannot delete these as they have legal meaning, despite being largely inaccurate. In addition only the copyright holder is permitted to change their respective copyright statement. Reviewed-by: Erik Skultety <eskultet@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
292 lines
7.9 KiB
C
292 lines
7.9 KiB
C
/*
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* suspend.c: Demo program showing how to suspend a domain
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*
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* Copyright (C) 2006-2013 Red Hat, Inc.
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* Copyright (C) 2006 Daniel P. Berrange
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <errno.h>
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#include <getopt.h>
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#include <libvirt/libvirt.h>
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#include <libvirt/virterror.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static int debug;
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/* On mingw, there's a header file that poisons the well:
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*
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*
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* CC domtop.o
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*domtop.c:40:0: warning: "ERROR" redefined [enabled by default]
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* #define ERROR(...) \
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* ^
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*In file included from /usr/i686-w64-mingw32/sys-root/mingw/include/windows.h:71:0,
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* from /usr/i686-w64-mingw32/sys-root/mingw/include/winsock2.h:23,
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* from ../../gnulib/lib/unistd.h:48,
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* from domtop.c:35:
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* /usr/i686-w64-mingw32/sys-root/mingw/include/wingdi.h:75:0: note: this is the location of the previous definition
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* #define ERROR 0
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*/
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#undef ERROR
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#define ERROR(...) \
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do { \
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fprintf(stderr, "ERROR %s:%d : ", __FUNCTION__, __LINE__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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} while (0)
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#define DEBUG(...) \
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do { \
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if (!debug) \
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break; \
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fprintf(stderr, "DEBUG %s:%d : ", __FUNCTION__, __LINE__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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} while (0)
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static void
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print_usage(const char *progname)
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{
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const char *unified_progname;
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if (!(unified_progname = strrchr(progname, '/')))
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unified_progname = progname;
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else
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unified_progname++;
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printf("\n%s [options] [domain name]\n\n"
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" options:\n"
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" -d | --debug enable debug printings\n"
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" -h | --help print this help\n"
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" -c | --connect=URI hypervisor connection URI\n"
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" -s | --seconds=X suspend domain for X seconds (default 1)\n",
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unified_progname);
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}
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static int
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parse_argv(int argc, char *argv[],
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const char **uri,
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const char **dom_name,
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unsigned int *seconds)
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{
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int ret = -1;
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int arg;
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unsigned long val;
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char *p;
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struct option opt[] = {
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{"debug", no_argument, NULL, 'd'},
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{"help", no_argument, NULL, 'h'},
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{"connect", required_argument, NULL, 'c'},
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{"seconds", required_argument, NULL, 's'},
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{NULL, 0, NULL, 0}
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};
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while ((arg = getopt_long(argc, argv, "+:dhc:s:", opt, NULL)) != -1) {
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switch (arg) {
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case 'd':
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debug = 1;
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break;
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case 'h':
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print_usage(argv[0]);
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exit(EXIT_SUCCESS);
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break;
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case 'c':
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*uri = optarg;
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break;
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case 's':
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/* strtoul man page suggest clearing errno prior to call */
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errno = 0;
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val = strtoul(optarg, &p, 10);
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if (errno || *p || p == optarg) {
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ERROR("Invalid number: '%s'", optarg);
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goto cleanup;
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}
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*seconds = val;
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if (*seconds != val) {
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ERROR("Integer overflow: %ld", val);
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goto cleanup;
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}
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break;
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case ':':
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ERROR("option '-%c' requires an argument", optopt);
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exit(EXIT_FAILURE);
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case '?':
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if (optopt)
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ERROR("unsupported option '-%c'. See --help.", optopt);
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else
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ERROR("unsupported option '%s'. See --help.", argv[optind - 1]);
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exit(EXIT_FAILURE);
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default:
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ERROR("unknown option");
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exit(EXIT_FAILURE);
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}
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}
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if (argc > optind)
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*dom_name = argv[optind];
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ret = 0;
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cleanup:
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return ret;
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}
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static int
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fetch_domains(virConnectPtr conn)
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{
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int num_domains, ret = -1;
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virDomainPtr *domains = NULL;
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ssize_t i;
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const int list_flags = VIR_CONNECT_LIST_DOMAINS_ACTIVE;
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DEBUG("Fetching list of running domains");
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num_domains = virConnectListAllDomains(conn, &domains, list_flags);
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DEBUG("num_domains=%d", num_domains);
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if (num_domains < 0) {
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ERROR("Unable to fetch list of running domains");
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goto cleanup;
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}
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printf("Running domains:\n");
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printf("----------------\n");
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for (i = 0; i < num_domains; i++) {
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virDomainPtr dom = domains[i];
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const char *dom_name = virDomainGetName(dom);
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printf("%s\n", dom_name);
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virDomainFree(dom);
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}
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ret = 0;
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cleanup:
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free(domains);
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return ret;
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}
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static int
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suspend_and_resume(virConnectPtr conn,
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const char *dom_name,
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unsigned int seconds)
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{
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int ret = -1;
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virDomainPtr dom;
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virDomainInfo dom_info;
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if (!(dom = virDomainLookupByName(conn, dom_name))) {
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ERROR("Unable to find domain '%s'", dom_name);
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goto cleanup;
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}
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if (virDomainGetInfo(dom, &dom_info) < 0) {
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ERROR("Unable to get domain info");
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goto cleanup;
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}
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DEBUG("Domain state %d", dom_info.state);
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switch (dom_info.state) {
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case VIR_DOMAIN_NOSTATE:
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case VIR_DOMAIN_RUNNING:
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case VIR_DOMAIN_BLOCKED:
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/* In these states the domain can be suspended */
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DEBUG("Suspending domain");
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if (virDomainSuspend(dom) < 0) {
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ERROR("Unable to suspend domain");
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goto cleanup;
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}
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DEBUG("Domain suspended. Entering sleep for %u seconds.", seconds);
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sleep(seconds);
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DEBUG("Sleeping done. Resuming the domain.");
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if (virDomainResume(dom) < 0) {
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ERROR("Unable to resume domain");
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goto cleanup;
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}
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break;
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default:
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/* In all other states domain can't be suspended */
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ERROR("Domain is not in a state where it can be suspended: %d",
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dom_info.state);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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int
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main(int argc, char *argv[])
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{
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int ret = EXIT_FAILURE;
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virConnectPtr conn = NULL;
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const char *uri = NULL;
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const char *dom_name = NULL;
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unsigned int seconds = 1; /* Suspend domain for this long */
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const int connect_flags = 0; /* No connect flags for now */
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if (parse_argv(argc, argv, &uri, &dom_name, &seconds) < 0)
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goto cleanup;
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DEBUG("Proceeding with uri=%s dom_name=%s seconds=%u",
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uri, dom_name, seconds);
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if (!(conn = virConnectOpenAuth(uri,
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virConnectAuthPtrDefault,
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connect_flags))) {
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ERROR("Failed to connect to hypervisor");
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goto cleanup;
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}
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DEBUG("Successfully connected");
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if (!dom_name) {
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if (fetch_domains(conn) == 0)
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ret = EXIT_SUCCESS;
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goto cleanup;
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}
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if (suspend_and_resume(conn, dom_name, seconds) < 0)
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goto cleanup;
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ret = EXIT_SUCCESS;
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cleanup:
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if (conn) {
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int tmp;
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tmp = virConnectClose(conn);
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if (tmp < 0) {
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ERROR("Failed to disconnect from the hypervisor");
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ret = EXIT_FAILURE;
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} else if (tmp > 0) {
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ERROR("One or more references were leaked after "
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"disconnect from the hypervisor");
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ret = EXIT_FAILURE;
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} else {
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DEBUG("Connection successfully closed");
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}
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}
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return ret;
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}
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