580 lines
12 KiB
C
580 lines
12 KiB
C
/*
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* Copyright (c) 1996, 1998-2005, 2007-2009
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* Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#define _SUDO_MAIN
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#include <config.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_FNMATCH
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# include <fnmatch.h>
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#endif /* HAVE_FNMATCH */
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#ifdef HAVE_NETGROUP_H
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# include <netgroup.h>
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#endif /* HAVE_NETGROUP_H */
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#include <ctype.h>
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#include <errno.h>
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#include <pwd.h>
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#include <grp.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include "sudoers.h"
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#include "interfaces.h"
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#include "parse.h"
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#include <gram.h>
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#ifndef HAVE_FNMATCH
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# include "compat/fnmatch.h"
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#endif /* HAVE_FNMATCH */
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/*
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* Function Prototypes
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*/
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int print_alias(void *, void *);
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void dump_sudoers(void);
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void print_defaults(void);
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void print_privilege(struct privilege *);
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void print_userspecs(void);
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void usage(void) __attribute__((__noreturn__));
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void set_runasgr(char *);
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void set_runaspw(char *);
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static int testsudoers_printf(int msg_type, const char *fmt, ...);
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extern void setgrfile(const char *);
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extern void setgrent(void);
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extern void endgrent(void);
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extern struct group *getgrent(void);
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extern struct group *getgrnam(const char *);
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extern struct group *getgrgid(gid_t);
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extern void setpwfile(const char *);
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extern void setpwent(void);
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extern void endpwent(void);
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extern struct passwd *getpwent(void);
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extern struct passwd *getpwnam(const char *);
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extern struct passwd *getpwuid(uid_t);
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/*
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* Globals
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*/
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int NewArgc;
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char **NewArgv;
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int num_interfaces;
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struct interface *interfaces;
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struct sudo_user sudo_user;
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struct passwd *list_pw;
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extern int parse_error;
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sudo_printf_t sudo_printf = testsudoers_printf;
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/* For getopt(3) */
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extern char *optarg;
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extern int optind;
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#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
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extern char *malloc_options;
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#endif
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#ifdef YYDEBUG
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extern int yydebug;
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#endif
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int
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main(int argc, char *argv[])
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{
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struct cmndspec *cs;
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struct privilege *priv;
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struct userspec *us;
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char *p, *grfile, *pwfile, *runas_group, *runas_user;
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char hbuf[MAXHOSTNAMELEN + 1];
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int ch, dflag, rval, matched;
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#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
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malloc_options = "AFGJPR";
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#endif
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#ifdef YYDEBUG
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yydebug = 1;
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#endif
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#if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
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setprogname(argc > 0 ? argv[0] : "testsudoers");
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#endif
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dflag = 0;
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grfile = pwfile = runas_group = runas_user = NULL;
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while ((ch = getopt(argc, argv, "dg:G:h:p:u:")) != -1) {
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switch (ch) {
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case 'd':
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dflag = 1;
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break;
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case 'h':
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user_host = optarg;
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break;
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case 'G':
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grfile = optarg;
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break;
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case 'g':
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runas_group = optarg;
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break;
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case 'p':
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pwfile = optarg;
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break;
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case 'u':
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runas_user = optarg;
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break;
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default:
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usage();
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break;
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}
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}
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argc -= optind;
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argv += optind;
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NewArgc = argc;
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NewArgv = argv;
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/* Set group/passwd file and init the cache. */
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if (grfile)
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setgrfile(grfile);
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if (pwfile)
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setpwfile(pwfile);
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sudo_setpwent();
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sudo_setgrent();
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if (argc < 2) {
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if (!dflag)
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usage();
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if ((sudo_user.pw = sudo_getpwnam("nobody")) == NULL)
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errorx(1, "no passwd entry for nobody!");
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user_cmnd = user_base = "true";
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} else {
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if ((sudo_user.pw = sudo_getpwnam(*argv)) == NULL)
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errorx(1, "no passwd entry for %s!", *argv);
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user_cmnd = *++argv;
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if ((p = strrchr(user_cmnd, '/')) != NULL)
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user_base = p + 1;
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else
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user_base = user_cmnd;
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NewArgc -= 2;
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}
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if (user_host == NULL) {
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if (gethostname(hbuf, sizeof(hbuf)) != 0)
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error(1, "gethostname");
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hbuf[sizeof(hbuf) - 1] = '\0';
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user_host = hbuf;
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}
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if ((p = strchr(user_host, '.'))) {
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*p = '\0';
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user_shost = estrdup(user_host);
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*p = '.';
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} else {
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user_shost = user_host;
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}
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/* Fill in user_args from NewArgv. */
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if (NewArgc > 1) {
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char *to, **from;
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size_t size, n;
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for (size = 0, from = NewArgv + 1; *from; from++)
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size += strlen(*from) + 1;
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user_args = (char *) emalloc(size);
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for (to = user_args, from = NewArgv + 1; *from; from++) {
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n = strlcpy(to, *from, size - (to - user_args));
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if (n >= size - (to - user_args))
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errorx(1, "internal error, init_vars() overflow");
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to += n;
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*to++ = ' ';
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}
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*--to = '\0';
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}
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/* Initialize default values. */
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init_defaults();
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/* Load ip addr/mask for each interface. */
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load_interfaces();
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/* Allocate space for data structures in the parser. */
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init_parser("sudoers", 0);
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if (yyparse() != 0 || parse_error)
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(void) fputs("Does not parse", stdout);
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else
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(void) fputs("Parses OK", stdout);
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if (!update_defaults(SETDEF_ALL))
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(void) fputs(" (problem with defaults entries)", stdout);
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puts(".");
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/*
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* Set runas passwd/group entries based on command line or sudoers.
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* Note that if runas_group was specified without runas_user we
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* defer setting runas_pw so the match routines know to ignore it.
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*/
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if (runas_group != NULL) {
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set_runasgr(runas_group);
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if (runas_user != NULL)
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set_runaspw(runas_user);
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} else
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set_runaspw(runas_user ? runas_user : def_runas_default);
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if (dflag) {
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(void) putchar('\n');
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dump_sudoers();
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if (argc < 2)
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exit(0);
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}
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/* This loop must match the one in sudoers_lookup() */
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printf("\nEntries for user %s:\n", user_name);
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matched = UNSPEC;
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tq_foreach_rev(&userspecs, us) {
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if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
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continue;
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tq_foreach_rev(&us->privileges, priv) {
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putchar('\n');
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print_privilege(priv); /* XXX */
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putchar('\n');
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if (hostlist_matches(&priv->hostlist) == ALLOW) {
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puts("\thost matched");
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tq_foreach_rev(&priv->cmndlist, cs) {
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if (runaslist_matches(&cs->runasuserlist,
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&cs->runasgrouplist) == ALLOW) {
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puts("\trunas matched");
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rval = cmnd_matches(cs->cmnd);
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if (rval != UNSPEC)
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matched = rval;
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printf("\tcmnd %s\n", rval == ALLOW ? "allowed" :
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rval == DENY ? "denied" : "unmatched");
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}
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}
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} else
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puts("\thost unmatched");
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}
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}
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printf("\nCommand %s\n", matched == ALLOW ? "allowed" :
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matched == DENY ? "denied" : "unmatched");
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exit(0);
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}
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void
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set_runaspw(char *user)
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{
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if (*user == '#') {
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if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
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runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
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} else {
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if ((runas_pw = sudo_getpwnam(user)) == NULL)
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errorx(1, "unknown user: %s", user);
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}
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}
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void
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set_runasgr(char *group)
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{
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if (*group == '#') {
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if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
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runas_gr = sudo_fakegrnam(group);
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} else {
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if ((runas_gr = sudo_getgrnam(group)) == NULL)
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errorx(1, "unknown group: %s", group);
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}
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}
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void
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sudo_setspent(void)
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{
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return;
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}
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void
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sudo_endspent(void)
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{
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return;
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}
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char *
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sudo_getepw(const struct passwd *pw)
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{
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return (pw->pw_passwd);
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}
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void
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set_fqdn(void)
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{
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return;
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}
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FILE *
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open_sudoers(const char *path, int isdir, int *keepopen)
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{
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return(fopen(path, "r"));
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}
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void
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init_envtables(void)
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{
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return;
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}
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int
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set_perms(int perm)
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{
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return 1;
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}
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void
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restore_perms(void)
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{
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}
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void
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cleanup(int gotsignal)
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{
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if (!gotsignal) {
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sudo_endpwent();
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sudo_endgrent();
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}
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}
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void
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print_member(struct member *m)
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{
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struct sudo_command *c;
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if (m->negated)
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putchar('!');
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if (m->name == NULL)
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fputs("ALL", stdout);
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else if (m->type != COMMAND)
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fputs(m->name, stdout);
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else {
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c = (struct sudo_command *) m->name;
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printf("%s%s%s", c->cmnd, c->args ? " " : "",
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c->args ? c->args : "");
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}
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}
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void
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print_defaults(void)
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{
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struct defaults *d;
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struct member *m;
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tq_foreach_fwd(&defaults, d) {
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(void) fputs("Defaults", stdout);
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switch (d->type) {
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case DEFAULTS_HOST:
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putchar('@');
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break;
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case DEFAULTS_USER:
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putchar(':');
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break;
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case DEFAULTS_RUNAS:
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putchar('>');
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break;
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case DEFAULTS_CMND:
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putchar('!');
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break;
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}
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tq_foreach_fwd(&d->binding, m) {
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if (m != tq_first(&d->binding))
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putchar(',');
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print_member(m);
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}
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printf("\t%s%s", d->op == FALSE ? "!" : "", d->var);
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if (d->val != NULL) {
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printf("%c%s", d->op == TRUE ? '=' : d->op, d->val);
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}
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putchar('\n');
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}
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}
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int
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print_alias(void *v1, void *v2)
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{
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struct alias *a = (struct alias *)v1;
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struct member *m;
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struct sudo_command *c;
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switch (a->type) {
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case HOSTALIAS:
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(void) printf("Host_Alias\t%s = ", a->name);
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break;
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case CMNDALIAS:
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(void) printf("Cmnd_Alias\t%s = ", a->name);
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break;
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case USERALIAS:
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(void) printf("User_Alias\t%s = ", a->name);
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break;
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case RUNASALIAS:
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(void) printf("Runas_Alias\t%s = ", a->name);
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break;
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}
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tq_foreach_fwd(&a->members, m) {
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if (m != tq_first(&a->members))
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fputs(", ", stdout);
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if (m->type == COMMAND) {
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c = (struct sudo_command *) m->name;
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printf("%s%s%s", c->cmnd, c->args ? " " : "",
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c->args ? c->args : "");
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} else
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fputs(m->name, stdout);
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}
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putchar('\n');
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return(0);
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}
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void
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print_privilege(struct privilege *priv)
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{
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struct cmndspec *cs;
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struct member *m;
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struct privilege *p;
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struct cmndtag tags;
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for (p = priv; p != NULL; p = p->next) {
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if (p != priv)
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fputs(" : ", stdout);
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tq_foreach_fwd(&p->hostlist, m) {
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if (m != tq_first(&p->hostlist))
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fputs(", ", stdout);
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print_member(m);
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}
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fputs(" = ", stdout);
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tags.nopasswd = tags.noexec = UNSPEC;
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tq_foreach_fwd(&p->cmndlist, cs) {
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if (cs != tq_first(&p->cmndlist))
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fputs(", ", stdout);
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/* XXX - runasgrouplist too */
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if (!tq_empty(&cs->runasuserlist)) {
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fputs("(", stdout);
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tq_foreach_fwd(&cs->runasuserlist, m) {
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if (m != tq_first(&cs->runasuserlist))
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fputs(", ", stdout);
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print_member(m);
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}
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fputs(") ", stdout);
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}
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#ifdef HAVE_SELINUX
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if (cs->role)
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printf("ROLE=%s ", cs->role);
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if (cs->type)
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printf("TYPE=%s ", cs->type);
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#endif /* HAVE_SELINUX */
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if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
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printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
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if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
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printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
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print_member(cs->cmnd);
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memcpy(&tags, &cs->tags, sizeof(tags));
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}
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}
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}
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void
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print_userspecs(void)
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{
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struct member *m;
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struct userspec *us;
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tq_foreach_fwd(&userspecs, us) {
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tq_foreach_fwd(&us->users, m) {
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if (m != tq_first(&us->users))
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fputs(", ", stdout);
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print_member(m);
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}
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putchar('\t');
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print_privilege(us->privileges.first); /* XXX */
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putchar('\n');
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}
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}
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static int
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testsudoers_printf(int msg_type, const char *fmt, ...)
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{
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va_list ap;
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FILE *fp;
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switch (msg_type) {
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case SUDO_CONV_INFO_MSG:
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fp = stdout;
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break;
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case SUDO_CONV_ERROR_MSG:
|
|
fp = stderr;
|
|
break;
|
|
default:
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(fp, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
dump_sudoers(void)
|
|
{
|
|
print_defaults();
|
|
|
|
putchar('\n');
|
|
alias_apply(print_alias, NULL);
|
|
|
|
putchar('\n');
|
|
print_userspecs();
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
(void) fprintf(stderr, "usage: %s [-d] [-G grfile] [-g group] [-h host] [-p pwfile] [-u user] <user> <command> [args]\n", getprogname());
|
|
exit(1);
|
|
}
|