+++ /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