498 lines
12 KiB
C
498 lines
12 KiB
C
/* Authors: Karl MacMillan <kmacmillan@tresys.com>
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* Joshua Brindle <jbrindle@tresys.com>
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* Jason Tang <jtang@tresys.com>
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*
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* Copyright (C) 2004-2005 Tresys Technology, LLC
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*/
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#include <fcntl.h>
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#include <getopt.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <semanage/modules.h>
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enum client_modes { NO_MODE, INSTALL_M, UPGRADE_M, BASE_M, ENABLE_M, DISABLE_M, REMOVE_M,
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LIST_M, RELOAD
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};
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/* list of modes in which one ought to commit afterwards */
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static const int do_commit[] = {
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0, 1, 1, 1, 1, 1, 1,
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0, 0
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};
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struct command {
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enum client_modes mode;
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char *arg;
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};
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static struct command *commands = NULL;
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static int num_commands = 0;
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/* options given on command line */
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static int verbose;
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static int reload;
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static int no_reload;
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static int create_store;
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static int build;
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static int disable_dontaudit;
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static semanage_handle_t *sh = NULL;
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static char *store;
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extern char *optarg;
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extern int optind;
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static void cleanup(void)
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{
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while (--num_commands >= 0) {
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free(commands[num_commands].arg);
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}
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free(commands);
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}
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/* Signal handlers. */
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static void handle_signal(int sig_num)
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{
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if (sig_num == SIGINT || sig_num == SIGQUIT || sig_num == SIGTERM) {
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/* catch these signals, and then drop them */
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}
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}
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static void set_store(char *storename)
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{
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/* For now this only supports a store name, later on this
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* should support an address for a remote connection */
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if ((store = strdup(storename)) == NULL) {
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fprintf(stderr, "Out of memory!\n");
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goto bad;
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}
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return;
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bad:
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cleanup();
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exit(1);
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}
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/* Establish signal handlers for the process. */
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static void create_signal_handlers(void)
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{
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if (signal(SIGINT, handle_signal) == SIG_ERR ||
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signal(SIGQUIT, handle_signal) == SIG_ERR ||
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signal(SIGTERM, handle_signal) == SIG_ERR) {
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fprintf(stderr, "Could not set up signal handler.\n");
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exit(255);
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}
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}
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static void usage(char *progname)
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{
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printf("usage: %s [options]... MODE [MODES]...\n", progname);
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printf("Manage SELinux policy modules.\n");
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printf("MODES:\n");
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printf(" -R, --reload reload policy\n");
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printf(" -B, --build build and reload policy\n");
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printf(" -i,--install=MODULE_PKG install a new module\n");
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printf(" -u,--upgrade=MODULE_PKG upgrade existing module\n");
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printf(" -b,--base=MODULE_PKG install new base module\n");
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printf(" -e,--enable=MODULE_PKG enable existing module\n");
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printf(" -d,--disable=MODULE_PKG disable existing module\n");
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printf(" -r,--remove=MODULE_NAME remove existing module\n");
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printf
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(" -l,--list-modules display list of installed modules\n");
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printf("Other options:\n");
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printf(" -s,--store name of the store to operate on\n");
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printf(" -n,--noreload do not reload policy after commit\n");
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printf(" -h,--help print this message and quit\n");
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printf(" -v,--verbose be verbose\n");
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printf(" -D,--disable_dontaudit Remove dontaudits from policy\n");
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}
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/* Sets the global mode variable to new_mode, but only if no other
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* mode has been given. */
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static void set_mode(enum client_modes new_mode, char *arg)
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{
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struct command *c;
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char *s;
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if ((c = realloc(commands, sizeof(*c) * (num_commands + 1))) == NULL) {
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fprintf(stderr, "Out of memory!\n");
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cleanup();
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exit(1);
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}
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commands = c;
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commands[num_commands].mode = new_mode;
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commands[num_commands].arg = NULL;
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num_commands++;
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if (arg != NULL) {
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if ((s = strdup(arg)) == NULL) {
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fprintf(stderr, "Out of memory!\n");
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cleanup();
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exit(1);
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}
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commands[num_commands - 1].arg = s;
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}
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}
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/* Parse command line and set global options. */
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static void parse_command_line(int argc, char **argv)
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{
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static struct option opts[] = {
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{"store", required_argument, NULL, 's'},
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{"base", required_argument, NULL, 'b'},
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{"help", 0, NULL, 'h'},
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{"install", required_argument, NULL, 'i'},
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{"list-modules", 0, NULL, 'l'},
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{"verbose", 0, NULL, 'v'},
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{"enable", required_argument, NULL, 'e'},
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{"disable", required_argument, NULL, 'd'},
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{"remove", required_argument, NULL, 'r'},
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{"upgrade", required_argument, NULL, 'u'},
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{"reload", 0, NULL, 'R'},
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{"noreload", 0, NULL, 'n'},
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{"build", 0, NULL, 'B'},
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{"disable_dontaudit", 0, NULL, 'D'},
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{"path", required_argument, NULL, 'p'},
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{NULL, 0, NULL, 0}
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};
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int i;
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verbose = 0;
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reload = 0;
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no_reload = 0;
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create_store = 0;
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while ((i =
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getopt_long(argc, argv, "p:s:b:hi:lvqe:d:r:u:RnBD", opts,
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NULL)) != -1) {
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switch (i) {
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case 'b':
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set_mode(BASE_M, optarg);
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create_store = 1;
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break;
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case 'h':
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usage(argv[0]);
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exit(0);
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case 'i':
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set_mode(INSTALL_M, optarg);
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break;
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case 'l':
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set_mode(LIST_M, NULL);
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break;
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case 'v':
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verbose = 1;
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break;
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case 'e':
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set_mode(ENABLE_M, optarg);
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break;
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case 'd':
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set_mode(DISABLE_M, optarg);
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break;
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case 'r':
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set_mode(REMOVE_M, optarg);
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break;
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case 'p':
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semanage_set_root(optarg);
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break;
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case 'u':
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set_mode(UPGRADE_M, optarg);
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break;
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case 's':
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set_store(optarg);
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break;
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case 'R':
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reload = 1;
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break;
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case 'n':
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no_reload = 1;
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break;
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case 'B':
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build = 1;
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break;
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case 'D':
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disable_dontaudit = 1;
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break;
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case '?':
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default:{
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usage(argv[0]);
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exit(1);
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}
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}
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}
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if ((build || reload) && num_commands) {
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fprintf(stderr,
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"build or reload should not be used with other commands\n");
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usage(argv[0]);
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exit(1);
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}
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if (num_commands == 0 && reload == 0 && build == 0) {
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fprintf(stderr, "At least one mode must be specified.\n");
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usage(argv[0]);
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exit(1);
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}
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if (optind < argc) {
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int mode;
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/* if -i/u/r was the last command treat any remaining
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* arguments as args. Will allow 'semodule -i *.pp' to
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* work as expected.
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*/
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if (commands && commands[num_commands - 1].mode == INSTALL_M) {
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mode = INSTALL_M;
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} else if (commands && commands[num_commands - 1].mode == UPGRADE_M) {
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mode = UPGRADE_M;
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} else if (commands && commands[num_commands - 1].mode == REMOVE_M) {
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mode = REMOVE_M;
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} else if (commands && commands[num_commands - 1].mode == ENABLE_M) {
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mode = ENABLE_M;
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} else if (commands && commands[num_commands - 1].mode == DISABLE_M) {
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mode = DISABLE_M;
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} else {
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fprintf(stderr, "unknown additional arguments:\n");
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while (optind < argc)
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fprintf(stderr, " %s", argv[optind++]);
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fprintf(stderr, "\n\n");
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usage(argv[0]);
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exit(1);
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}
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while (optind < argc)
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set_mode(mode, argv[optind++]);
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}
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}
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int main(int argc, char *argv[])
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{
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int i, commit = 0;
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int result;
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int status = EXIT_FAILURE;
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create_signal_handlers();
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parse_command_line(argc, argv);
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if (build)
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commit = 1;
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sh = semanage_handle_create();
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if (!sh) {
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fprintf(stderr, "%s: Could not create semanage handle\n",
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argv[0]);
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goto cleanup_nohandle;
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}
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if (store) {
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/* Set the store we want to connect to, before connecting.
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* this will always set a direct connection now, an additional
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* option will need to be used later to specify a policy server
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* location */
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semanage_select_store(sh, store, SEMANAGE_CON_DIRECT);
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}
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/* if installing base module create store if necessary, for bootstrapping */
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semanage_set_create_store(sh, create_store);
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if (!create_store) {
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if (!semanage_is_managed(sh)) {
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fprintf(stderr,
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"%s: SELinux policy is not managed or store cannot be accessed.\n",
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argv[0]);
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goto cleanup;
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}
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if (semanage_access_check(sh) < SEMANAGE_CAN_READ) {
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fprintf(stderr, "%s: Cannot read policy store.\n",
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argv[0]);
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goto cleanup;
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}
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}
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if ((result = semanage_connect(sh)) < 0) {
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fprintf(stderr, "%s: Could not connect to policy handler\n",
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argv[0]);
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goto cleanup;
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}
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if (reload) {
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if ((result = semanage_reload_policy(sh)) < 0) {
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fprintf(stderr, "%s: Could not reload policy\n",
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argv[0]);
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goto cleanup;
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}
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}
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if (build) {
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if ((result = semanage_begin_transaction(sh)) < 0) {
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fprintf(stderr, "%s: Could not begin transaction: %s\n",
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argv[0], errno ? strerror(errno) : "");
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goto cleanup;
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}
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}
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for (i = 0; i < num_commands; i++) {
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enum client_modes mode = commands[i].mode;
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char *mode_arg = commands[i].arg;
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switch (mode) {
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case INSTALL_M:{
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if (verbose) {
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printf
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("Attempting to install module '%s':\n",
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mode_arg);
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}
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result =
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semanage_module_install_file(sh, mode_arg);
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break;
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}
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case UPGRADE_M:{
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if (verbose) {
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printf
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("Attempting to upgrade module '%s':\n",
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mode_arg);
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}
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result =
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semanage_module_upgrade_file(sh, mode_arg);
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break;
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}
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case BASE_M:{
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if (verbose) {
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printf
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("Attempting to install base module '%s':\n",
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mode_arg);
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}
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result =
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semanage_module_install_base_file(sh, mode_arg);
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break;
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}
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case ENABLE_M:{
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if (verbose) {
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printf
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("Attempting to enable module '%s':\n",
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mode_arg);
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}
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result = semanage_module_enable(sh, mode_arg);
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if ( result == -2 ) {
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continue;
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}
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break;
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}
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case DISABLE_M:{
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if (verbose) {
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printf
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("Attempting to disable module '%s':\n",
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mode_arg);
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}
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result = semanage_module_disable(sh, mode_arg);
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if ( result == -2 ) {
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continue;
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}
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break;
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}
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case REMOVE_M:{
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if (verbose) {
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printf
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("Attempting to remove module '%s':\n",
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mode_arg);
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}
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result = semanage_module_remove(sh, mode_arg);
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if ( result == -2 ) {
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continue;
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}
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break;
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}
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case LIST_M:{
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semanage_module_info_t *modinfo;
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int num_modules;
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if (verbose) {
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printf
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("Attempting to list active modules:\n");
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}
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if ((result =
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semanage_module_list(sh, &modinfo,
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&num_modules)) >= 0) {
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int j;
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if (num_modules == 0) {
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printf("No modules.\n");
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}
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for (j = 0; j < num_modules; j++) {
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semanage_module_info_t *m =
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semanage_module_list_nth
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(modinfo, j);
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printf("%s\t%s\t%s\n",
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semanage_module_get_name
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(m),
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semanage_module_get_version
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(m),
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(semanage_module_get_enabled(m) ? "" : "Disabled"));
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semanage_module_info_datum_destroy
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(m);
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}
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free(modinfo);
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}
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break;
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}
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default:{
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fprintf(stderr,
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"%s: Unknown mode specified.\n",
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argv[0]);
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usage(argv[0]);
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goto cleanup;
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}
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}
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commit += do_commit[mode];
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if (result < 0) {
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fprintf(stderr, "%s: Failed on %s!\n", argv[0],
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mode_arg ? : "list");
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goto cleanup;
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} else if (verbose) {
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printf("Ok: return value of %d.\n", result);
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}
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}
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if (commit) {
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if (verbose)
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printf("Committing changes:\n");
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if (no_reload)
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semanage_set_reload(sh, 0);
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if (build)
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semanage_set_rebuild(sh, 1);
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if (disable_dontaudit)
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semanage_set_disable_dontaudit(sh, 1);
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else if (build)
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semanage_set_disable_dontaudit(sh, 0);
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result = semanage_commit(sh);
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}
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if (result < 0) {
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fprintf(stderr, "%s: Failed!\n", argv[0]);
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goto cleanup;
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} else if (commit && verbose) {
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printf("Ok: transaction number %d.\n", result);
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}
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if (semanage_disconnect(sh) < 0) {
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fprintf(stderr, "%s: Error disconnecting\n", argv[0]);
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goto cleanup;
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}
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status = EXIT_SUCCESS;
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cleanup:
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if (semanage_is_connected(sh)) {
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if (semanage_disconnect(sh) < 0) {
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fprintf(stderr, "%s: Error disconnecting\n", argv[0]);
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}
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}
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semanage_handle_destroy(sh);
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cleanup_nohandle:
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cleanup();
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exit(status);
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}
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