--- /dev/null
+// $Id$ --*- c -*--
+
+// Copyright (C) 2007 Daniel Hokka Zakrisson
+//
+// 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; version 2 of the License.
+//
+// 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "util.h"
+
+#include <vserver.h>
+#include <getopt.h>
+#include <errno.h>
+#include <sys/types.h>
+
+
+#define ENSC_WRAPPERS_PREFIX "vtag: "
+#define ENSC_WRAPPERS_VSERVER 1
+#include <wrappers.h>
+
+#define CMD_HELP 0x1000
+#define CMD_VERSION 0x1001
+#define CMD_TAG 0x4000
+#define CMD_CREATE 0x4001
+#define CMD_MIGRATE 0x4002
+#define CMD_SILENTEXIST 0x4003
+#define CMD_SILENT 0x4004
+
+
+struct option const
+CMDLINE_OPTIONS[] = {
+ { "help", no_argument, 0, CMD_HELP },
+ { "version", no_argument, 0, CMD_VERSION },
+ { "tag", required_argument, 0, CMD_TAG },
+ { "create", no_argument, 0, CMD_CREATE },
+ { "migrate", no_argument, 0, CMD_MIGRATE },
+ { "silent", no_argument, 0, CMD_SILENT },
+ { "silentexist", no_argument, 0, CMD_SILENTEXIST },
+ { 0,0,0,0 },
+};
+
+struct Arguments {
+ bool do_create;
+ bool do_migrate;
+ bool is_silentexist;
+ int verbosity;
+ tag_t tag;
+};
+
+int wrapper_exit_code = 255;
+
+static void
+showHelp(int fd, char const *cmd, int res)
+{
+ WRITE_MSG(fd, "Usage:\n ");
+ WRITE_STR(fd, cmd);
+ WRITE_MSG(fd,
+ " (--create|--migrate) --tag <tag> <opts>* [--] <program> <args>*\n "
+ "\n"
+ "<opts> can be:\n"
+ " --silentexist ... be silent when context exists already; useful\n"
+ " for '--create' only\n"
+ " --silent ... if the feature is not supported, just execute\n"
+ " <program>\n"
+ "\n"
+ "'vtag --create' exits with code 254 iff the context exists already.\n"
+ "\n"
+ "Please report bugs to " PACKAGE_BUGREPORT "\n");
+
+ exit(res);
+}
+
+static void
+showVersion()
+{
+ WRITE_MSG(1,
+ "vtag " VERSION " -- sets the process's filesystem tag\n"
+ "This program is part of " PACKAGE_STRING "\n\n"
+ "Copyright (C) 2007 Daniel Hokka Zakrisson\n"
+ VERSION_COPYRIGHT_DISCLAIMER);
+ exit(0);
+}
+
+static inline ALWAYSINLINE int
+doit(struct Arguments const *args, char *argv[])
+{
+ tag_t tag;
+
+ if (!vc_isSupported(vcFEATURE_PPTAG)) {
+ if (args->verbosity >= 1) {
+ errno = ENOSYS;
+ perror(ENSC_WRAPPERS_PREFIX);
+ return wrapper_exit_code;
+ }
+ else
+ goto exec;
+ }
+
+ if (args->do_create) {
+ tag = vc_tag_create(args->tag);
+ if (tag==VC_NOCTX) {
+ switch (errno) {
+ case EEXIST :
+ if (!args->is_silentexist)
+ perror(ENSC_WRAPPERS_PREFIX "vc_tag_create()");
+ return 254;
+ default :
+ perror(ENSC_WRAPPERS_PREFIX "vc_tag_create()");
+ return wrapper_exit_code;
+ }
+ }
+ }
+ else
+ tag = args->tag;
+
+ if (args->do_migrate)
+ Evc_tag_migrate(tag);
+
+exec:
+ execvp(argv[optind], argv+optind);
+
+ PERROR_Q(ENSC_WRAPPERS_PREFIX "execvp", argv[optind]);
+ return wrapper_exit_code;
+}
+
+int main (int argc, char *argv[])
+{
+ struct Arguments args = {
+ .tag = VC_NOCTX,
+ .do_create = false,
+ .do_migrate = false,
+ .is_silentexist = false,
+ .verbosity = 1,
+ };
+
+ while (1) {
+ int c = getopt_long(argc, argv, "+", CMDLINE_OPTIONS, 0);
+ if (c==-1) break;
+
+ switch (c) {
+ case CMD_HELP : showHelp(1, argv[0], 0);
+ case CMD_VERSION : showVersion();
+ case CMD_CREATE : args.do_create = true; break;
+ case CMD_MIGRATE : args.do_migrate = true; break;
+ case CMD_SILENTEXIST : args.is_silentexist = true; break;
+ case CMD_TAG : args.tag = Evc_tagopt2tag(optarg,true); break;
+ case CMD_SILENT : args.verbosity--; break;
+
+ default :
+ WRITE_MSG(2, "Try '");
+ WRITE_STR(2, argv[0]);
+ WRITE_MSG(2, " --help' for more information.\n");
+ return wrapper_exit_code;
+ break;
+ }
+ }
+
+ if (!args.do_create && !args.do_migrate)
+ WRITE_MSG(2, "Neither '--create' nor '--migrate' specified; try '--help' for more information\n");
+ else if (args.do_create && args.do_migrate)
+ WRITE_MSG(2, "Can not specify '--create' and '--migrate' at the same time; try '--help' for more information\n");
+ else if (args.tag==VC_NOCTX)
+ WRITE_MSG(2, "You must specify the tag with '--tag'; try '--help' for more information\n");
+ else if (optind>=argc)
+ WRITE_MSG(2, "No command given; use '--help' for more information.\n");
+ else
+ return doit(&args, argv);
+
+ return wrapper_exit_code;
+}
git://git.onelab.eu / util-vserver.git / blobdiff