/*
- * Copyright (c) 1996, 1998-2005 Todd C. Miller <Todd.Miller@courtesan.com>
+ * Copyright (c) 1996, 1998-2005, 2007-2010
+ * Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
+#include <sys/socket.h>
#include <sys/time.h>
#ifndef __TANDEM
# include <sys/file.h>
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
-#else
-# ifdef HAVE_STRINGS_H
-# include <strings.h>
-# endif
#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
-#ifdef HAVE_ERR_H
-# include <err.h>
-#else
-# include "emul/err.h"
-#endif /* HAVE_ERR_H */
#include <ctype.h>
#include <pwd.h>
-#if TIME_WITH_SYS_TIME
-# include <time.h>
-#endif
+#include <grp.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
-#ifndef HAVE_TIMESPEC
-# include <emul/timespec.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#if TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
+#ifdef __STDC__
+# include <stdarg.h>
+#else
+# include <varargs.h>
#endif
#include "sudo.h"
-#include "version.h"
-
-#ifndef lint
-__unused static const char rcsid[] = "$Sudo: visudo.c,v 1.166.2.10 2007/09/01 13:39:13 millert Exp $";
-#endif /* lint */
+#include "interfaces.h"
+#include "parse.h"
+#include "redblack.h"
+#include <gram.h>
struct sudoersfile {
+ struct sudoersfile *prev, *next;
char *path;
char *tpath;
int fd;
- off_t orig_size;
- struct timespec orig_mtim;
+ int modified;
+ int doedit;
};
+TQ_DECLARE(sudoersfile);
/*
* Function prototypes
*/
-static void usage __P((void)) __attribute__((__noreturn__));
-static char whatnow __P((void));
-static RETSIGTYPE Exit __P((int));
-static void edit_sudoers __P((struct sudoersfile *, char *, char *, int));
-static void visudo __P((struct sudoersfile *, char *, char *));
-static void setup_signals __P((void));
-static void install_sudoers __P((struct sudoersfile *, int));
-static int check_syntax __P(());
-static int run_command __P((char *, char **));
+static RETSIGTYPE quit __P((int));
static char *get_args __P((char *));
static char *get_editor __P((char **));
-static FILE *open_sudoers __P((struct sudoersfile *));
-
-int command_matches __P((char *, char *));
-int addr_matches __P((char *));
-int hostname_matches __P((char *, char *, char *));
-int netgr_matches __P((char *, char *, char *, char *));
-int usergr_matches __P((char *, char *, struct passwd *));
-int userpw_matches __P((char *, char *, struct passwd *));
-void init_parser __P((void));
-void yyerror __P((char *));
-void yyrestart __P((FILE *));
+static void get_hostname __P((void));
+static char whatnow __P((void));
+static int check_aliases __P((int, int));
+static int check_syntax __P((char *, int, int));
+static int edit_sudoers __P((struct sudoersfile *, char *, char *, int));
+static int install_sudoers __P((struct sudoersfile *, int));
+static int print_unused __P((void *, void *));
+static int reparse_sudoers __P((char *, char *, int, int));
+static int run_command __P((char *, char **));
+static void print_selfref __P((char *, int, int, int));
+static void print_undefined __P((char *, int, int, int));
+static void setup_signals __P((void));
+static void usage __P((void)) __attribute__((__noreturn__));
+
+extern void yyerror __P((const char *));
+extern void yyrestart __P((FILE *));
/*
* External globals exported by the parser
*/
+extern struct rbtree *aliases;
extern FILE *yyin;
-extern int errorlineno;
-extern int pedantic;
-extern int quiet;
-
+extern char *sudoers, *errorfile;
+extern int errorlineno, parse_error;
/* For getopt(3) */
extern char *optarg;
extern int optind;
/*
* Globals
*/
+int Argc;
char **Argv;
+int num_interfaces;
+struct interface *interfaces;
struct sudo_user sudo_user;
-int Argc, parse_error = FALSE;
-static struct sudoersfile sudoers;
+struct passwd *list_pw;
+static struct sudoersfile_list sudoerslist;
+static struct rbtree *alias_freelist;
int
main(argc, argv)
int argc;
char **argv;
{
- char *args, *editor;
- int ch, checkonly, n, oldperms;
-
- /* Initialize sudoers struct. */
- sudoers.path = _PATH_SUDOERS;
- sudoers.tpath = _PATH_SUDOERS_TMP;
- sudoers.fd = -1;
-
- /* Warn about aliases that are used before being defined. */
- pedantic = 1;
+ struct sudoersfile *sp;
+ char *args, *editor, *sudoers_path;
+ int ch, checkonly, quiet, strict, oldperms;
+#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
+ extern char *malloc_options;
+ malloc_options = "AFGJPR";
+#endif
Argv = argv;
if ((Argc = argc) < 1)
/*
* Arg handling.
*/
- checkonly = oldperms = FALSE;
+ checkonly = oldperms = quiet = strict = FALSE;
+ sudoers_path = _PATH_SUDOERS;
while ((ch = getopt(argc, argv, "Vcf:sq")) != -1) {
switch (ch) {
case 'V':
- (void) printf("%s version %s\n", getprogname(), version);
+ (void) printf("%s version %s\n", getprogname(), PACKAGE_VERSION);
exit(0);
case 'c':
checkonly++; /* check mode */
break;
- case 'f': /* sudoers file path */
- sudoers.path = optarg;
- easprintf(&sudoers.tpath, "%s.tmp", optarg);
+ case 'f':
+ sudoers_path = optarg; /* sudoers file path */
oldperms = TRUE;
break;
case 's':
- pedantic++; /* strict mode */
+ strict++; /* strict mode */
break;
case 'q':
quiet++; /* quiet mode */
if (argc)
usage();
+ sudo_setpwent();
+ sudo_setgrent();
+
/* Mock up a fake sudo_user struct. */
- user_host = user_shost = user_cmnd = "";
- if ((sudo_user.pw = getpwuid(getuid())) == NULL)
- errx(1, "you don't exist in the passwd database");
+ user_cmnd = "";
+ if ((sudo_user.pw = sudo_getpwuid(getuid())) == NULL)
+ errorx(1, "you don't exist in the passwd database");
+ get_hostname();
/* Setup defaults data structures. */
init_defaults();
if (checkonly)
- exit(check_syntax());
+ exit(check_syntax(sudoers_path, quiet, strict));
/*
- * Open and parse the existing sudoers file(s) in quiet mode to highlight
- * any existing errors and to pull in editor and env_editor conf values.
- */
- if ((yyin = open_sudoers(&sudoers)) == NULL)
- err(1, "%s", sudoers.path);
- n = quiet;
- quiet = 1;
- init_parser();
+ * Parse the existing sudoers file(s) in quiet mode to highlight any
+ * existing errors and to pull in editor and env_editor conf values.
+ */
+ if ((yyin = open_sudoers(sudoers_path, TRUE, NULL)) == NULL) {
+ error(1, "%s", sudoers_path);
+ }
+ init_parser(sudoers_path, 0);
yyparse();
- parse_error = FALSE;
- quiet = n;
+ (void) update_defaults(SETDEF_GENERIC|SETDEF_HOST|SETDEF_USER);
- /* Edit sudoers, check for parse errors and re-edit on failure. */
editor = get_editor(&args);
- visudo(&sudoers, editor, args);
- /* Install the new sudoers file. */
- install_sudoers(&sudoers, oldperms);
+ /* Install signal handlers to clean up temp files if we are killed. */
+ setup_signals();
+
+ /* Edit the sudoers file(s) */
+ tq_foreach_fwd(&sudoerslist, sp) {
+ if (!sp->doedit)
+ continue;
+ if (sp != tq_first(&sudoerslist)) {
+ printf("press return to edit %s: ", sp->path);
+ while ((ch = getchar()) != EOF && ch != '\n')
+ continue;
+ }
+ edit_sudoers(sp, editor, args, -1);
+ }
+
+ /* Check edited files for a parse error and re-edit any that fail. */
+ reparse_sudoers(editor, args, strict, quiet);
+
+ /* Install the sudoers temp files. */
+ tq_foreach_fwd(&sudoerslist, sp) {
+ if (!sp->modified)
+ (void) unlink(sp->tpath);
+ else
+ (void) install_sudoers(sp, oldperms);
+ }
exit(0);
}
/*
- * Edit the sudoers file.
+ * Edit each sudoers file.
* Returns TRUE on success, else FALSE.
*/
-static void
+static int
edit_sudoers(sp, editor, args, lineno)
struct sudoersfile *sp;
char *editor, *args;
int lineno;
{
+ int tfd; /* sudoers temp file descriptor */
+ int modified; /* was the file modified? */
int ac; /* argument count */
char **av; /* argument vector for run_command */
char *cp; /* scratch char pointer */
+ char buf[PATH_MAX*2]; /* buffer used for copying files */
char linestr[64]; /* string version of lineno */
- struct timespec ts1, ts2; /* time before and after edit */
+ struct timeval tv, tv1, tv2; /* time before and after edit */
+ struct timeval orig_mtim; /* starting mtime of sudoers file */
+ off_t orig_size; /* starting size of sudoers file */
+ ssize_t nread; /* number of bytes read */
struct stat sb; /* stat buffer */
- /* Make timestamp on temp file match original. */
- (void) touch(-1, sp->tpath, &sp->orig_mtim);
+#ifdef HAVE_FSTAT
+ if (fstat(sp->fd, &sb) == -1)
+#else
+ if (stat(sp->path, &sb) == -1)
+#endif
+ error(1, "can't stat %s", sp->path);
+ orig_size = sb.st_size;
+ mtim_get(&sb, &orig_mtim);
+
+ /* Create the temp file if needed and set timestamp. */
+ if (sp->tpath == NULL) {
+ easprintf(&sp->tpath, "%s.tmp", sp->path);
+ tfd = open(sp->tpath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+ if (tfd < 0)
+ error(1, "%s", sp->tpath);
+
+ /* Copy sp->path -> sp->tpath and reset the mtime. */
+ if (orig_size != 0) {
+ (void) lseek(sp->fd, (off_t)0, SEEK_SET);
+ while ((nread = read(sp->fd, buf, sizeof(buf))) > 0)
+ if (write(tfd, buf, nread) != nread)
+ error(1, "write error");
+
+ /* Add missing newline at EOF if needed. */
+ if (nread > 0 && buf[nread - 1] != '\n') {
+ buf[0] = '\n';
+ write(tfd, buf, 1);
+ }
+ }
+ (void) close(tfd);
+ }
+ (void) touch(-1, sp->tpath, &orig_mtim);
/* Find the length of the argument vector */
ac = 3 + (lineno > 0);
* XPG4 specifies that vi's exit value is a function of the
* number of errors during editing (?!?!).
*/
- gettime(&ts1);
+ gettime(&tv1);
if (run_command(editor, av) != -1) {
- gettime(&ts2);
+ gettime(&tv2);
/*
* Sanity checks.
*/
if (stat(sp->tpath, &sb) < 0) {
- warnx("cannot stat temporary file (%s), %s unchanged",
+ warningx("cannot stat temporary file (%s), %s unchanged",
sp->tpath, sp->path);
- Exit(-1);
+ return(FALSE);
}
- if (sb.st_size == 0) {
- warnx("zero length temporary file (%s), %s unchanged",
+ if (sb.st_size == 0 && orig_size != 0) {
+ warningx("zero length temporary file (%s), %s unchanged",
sp->tpath, sp->path);
- Exit(-1);
+ sp->modified = TRUE;
+ return(FALSE);
}
} else {
- warnx("editor (%s) failed, %s unchanged", editor, sp->path);
- Exit(-1);
+ warningx("editor (%s) failed, %s unchanged", editor, sp->path);
+ return(FALSE);
}
- /* Check to see if the user changed the file. */
- if (sp->orig_size == sb.st_size &&
- sp->orig_mtim.tv_sec == mtim_getsec(sb) &&
- sp->orig_mtim.tv_nsec == mtim_getnsec(sb)) {
+ /* Set modified bit if use changed the file. */
+ modified = TRUE;
+ mtim_get(&sb, &tv);
+ if (orig_size == sb.st_size && timevalcmp(&orig_mtim, &tv, ==)) {
/*
* If mtime and size match but the user spent no measurable
* time in the editor we can't tell if the file was changed.
*/
-#ifdef HAVE_TIMESPECSUB2
- timespecsub(&ts1, &ts2);
-#else
- timespecsub(&ts1, &ts2, &ts2);
-#endif
- if (timespecisset(&ts2)) {
- warnx("%s unchanged", sp->tpath);
- Exit(0);
- }
+ timevalsub(&tv1, &tv2);
+ if (timevalisset(&tv2))
+ modified = FALSE;
}
+
+ /*
+ * If modified in this edit session, mark as modified.
+ */
+ if (modified)
+ sp->modified = modified;
+ else
+ warningx("%s unchanged", sp->tpath);
+
+ return(TRUE);
}
/*
* Parse sudoers after editing and re-edit any ones that caused a parse error.
* Returns TRUE on success, else FALSE.
*/
-static void
-visudo(sp, editor, args)
- struct sudoersfile *sp;
+static int
+reparse_sudoers(editor, args, strict, quiet)
char *editor, *args;
+ int strict, quiet;
{
+ struct sudoersfile *sp, *last;
+ FILE *fp;
int ch;
/*
- * Parse the edited sudoers file and do sanity checking
+ * Parse the edited sudoers files and do sanity checking
*/
do {
- edit_sudoers(sp, editor, args, errorlineno);
-
- yyin = fopen(sp->tpath, "r+");
- if (yyin == NULL) {
- warnx("can't re-open temporary file (%s), %s unchanged.",
+ sp = tq_first(&sudoerslist);
+ last = tq_last(&sudoerslist);
+ fp = fopen(sp->tpath, "r+");
+ if (fp == NULL)
+ errorx(1, "can't re-open temporary file (%s), %s unchanged.",
sp->tpath, sp->path);
- Exit(-1);
- }
-
- /* Add missing newline at EOF if needed. */
- if (fseek(yyin, -1, SEEK_END) == 0 && (ch = fgetc(yyin)) != '\n')
- fputc('\n', yyin);
- rewind(yyin);
/* Clean slate for each parse */
- user_runas = NULL;
init_defaults();
- init_parser();
+ init_parser(sp->path, quiet);
/* Parse the sudoers temp file */
- yyrestart(yyin);
- if (yyparse() && parse_error != TRUE) {
- warnx("unabled to parse temporary file (%s), unknown error",
+ yyrestart(fp);
+ if (yyparse() && !parse_error) {
+ warningx("unabled to parse temporary file (%s), unknown error",
sp->tpath);
parse_error = TRUE;
+ errorfile = sp->path;
}
fclose(yyin);
+ if (!parse_error) {
+ if (!update_defaults(SETDEF_GENERIC|SETDEF_HOST|SETDEF_USER) ||
+ check_aliases(strict, quiet) != 0) {
+ parse_error = TRUE;
+ errorfile = sp->path;
+ }
+ }
/*
* Got an error, prompt the user for what to do now
switch (whatnow()) {
case 'Q' : parse_error = FALSE; /* ignore parse error */
break;
- case 'x' : Exit(0);
+ case 'x' : cleanup(0);
+ exit(0);
break;
}
}
+ if (parse_error) {
+ /* Edit file with the parse error */
+ tq_foreach_fwd(&sudoerslist, sp) {
+ if (errorfile == NULL || strcmp(sp->path, errorfile) == 0) {
+ edit_sudoers(sp, editor, args, errorlineno);
+ break;
+ }
+ }
+ if (sp == NULL)
+ errorx(1, "internal error, can't find %s in list!", sudoers);
+ }
+
+ /* If any new #include directives were added, edit them too. */
+ for (sp = last->next; sp != NULL; sp = sp->next) {
+ printf("press return to edit %s: ", sp->path);
+ while ((ch = getchar()) != EOF && ch != '\n')
+ continue;
+ edit_sudoers(sp, editor, args, errorlineno);
+ }
} while (parse_error);
+
+ return(TRUE);
}
/*
* Set the owner and mode on a sudoers temp file and
* move it into place. Returns TRUE on success, else FALSE.
*/
-static void
+static int
install_sudoers(sp, oldperms)
struct sudoersfile *sp;
int oldperms;
#else
if (stat(sp->path, &sb) == -1)
#endif
- err(1, "can't stat %s", sp->path);
+ error(1, "can't stat %s", sp->path);
(void) chown(sp->tpath, sb.st_uid, sb.st_gid);
(void) chmod(sp->tpath, sb.st_mode & 0777);
} else {
if (chown(sp->tpath, SUDOERS_UID, SUDOERS_GID) != 0) {
- warn("unable to set (uid, gid) of %s to (%d, %d)",
+ warning("unable to set (uid, gid) of %s to (%d, %d)",
sp->tpath, SUDOERS_UID, SUDOERS_GID);
- Exit(-1);
+ return(FALSE);
}
if (chmod(sp->tpath, SUDOERS_MODE) != 0) {
- warn("unable to change mode of %s to 0%o", sp->tpath, SUDOERS_MODE);
- Exit(-1);
+ warning("unable to change mode of %s to 0%o", sp->tpath,
+ SUDOERS_MODE);
+ return(FALSE);
}
}
* rename(2)'d to sp->path. If the rename(2) fails we try using
* mv(1) in case sp->tpath and sp->path are on different file systems.
*/
- if (rename(sp->tpath, sp->path) != 0) {
+ if (rename(sp->tpath, sp->path) == 0) {
+ efree(sp->tpath);
+ sp->tpath = NULL;
+ } else {
if (errno == EXDEV) {
char *av[4];
- warnx("%s and %s not on the same file system, using mv to rename",
+ warningx("%s and %s not on the same file system, using mv to rename",
sp->tpath, sp->path);
/* Build up argument vector for the command */
/* And run it... */
if (run_command(_PATH_MV, av)) {
- warnx("command failed: '%s %s %s', %s unchanged",
+ warningx("command failed: '%s %s %s', %s unchanged",
_PATH_MV, sp->tpath, sp->path, sp->path);
- Exit(-1);
+ (void) unlink(sp->tpath);
+ efree(sp->tpath);
+ sp->tpath = NULL;
+ return(FALSE);
}
+ efree(sp->tpath);
+ sp->tpath = NULL;
} else {
- warn("error renaming %s, %s unchanged", sp->tpath, sp->path);
- Exit(-1);
+ warning("error renaming %s, %s unchanged", sp->tpath, sp->path);
+ (void) unlink(sp->tpath);
+ return(FALSE);
}
}
-}
-
-/*
- * Dummy *_matches routines.
- * These exist to allow us to use the same parser as sudo(8).
- */
-int
-command_matches(path, sudoers_args)
- char *path;
- char *sudoers_args;
-{
- return(TRUE);
-}
-
-int
-addr_matches(n)
- char *n;
-{
return(TRUE);
}
-int
-hostname_matches(s, l, p)
- char *s, *l, *p;
-{
- return(TRUE);
-}
-
-int
-usergr_matches(g, u, pw)
- char *g, *u;
- struct passwd *pw;
+/* STUB */
+void
+set_fqdn()
{
- return(TRUE);
+ return;
}
-int
-userpw_matches(s, u, pw)
- char *s, *u;
- struct passwd *pw;
+/* STUB */
+void
+init_envtables()
{
- return(TRUE);
+ return;
}
+/* STUB */
int
-netgr_matches(n, h, sh, u)
- char *n, *h, *sh, *u;
+user_is_exempt()
{
- return(TRUE);
+ return(FALSE);
}
+/* STUB */
void
-set_fqdn()
+sudo_setspent()
{
return;
}
-int
-set_runaspw(user)
- char *user;
-{
- extern int sudolineno, used_runas;
-
- if (used_runas) {
- (void) fprintf(stderr,
- "%s: runas_default set after old value is in use near line %d\n",
- pedantic > 1 ? "Error" : "Warning", sudolineno);
- if (pedantic > 1)
- yyerror(NULL);
- }
- return(TRUE);
-}
-
-int
-user_is_exempt()
+/* STUB */
+void
+sudo_endspent()
{
- return(TRUE);
+ return;
}
-void
-init_envtables()
+char *
+sudo_getepw(pw)
+ const struct passwd *pw;
{
- return;
+ return (pw->pw_passwd);
}
/*
/*
* Setup signal handlers to cleanup nicely.
*/
+ zero_bytes(&sa, sizeof(sa));
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
- sa.sa_handler = Exit;
+ sa.sa_handler = quit;
(void) sigaction(SIGTERM, &sa, NULL);
(void) sigaction(SIGHUP, &sa, NULL);
(void) sigaction(SIGINT, &sa, NULL);
char **argv;
{
int status;
- pid_t pid;
- sigset_t set, oset;
-
- (void) sigemptyset(&set);
- (void) sigaddset(&set, SIGCHLD);
- (void) sigprocmask(SIG_BLOCK, &set, &oset);
+ pid_t pid, rv;
switch (pid = fork()) {
case -1:
- warn("unable to run %s", path);
- Exit(-1);
+ error(1, "unable to run %s", path);
break; /* NOTREACHED */
case 0:
- (void) sigprocmask(SIG_SETMASK, &oset, NULL);
- endpwent();
+ sudo_endpwent();
+ sudo_endgrent();
closefrom(STDERR_FILENO + 1);
execv(path, argv);
- warn("unable to run %s", path);
+ warning("unable to run %s", path);
_exit(127);
break; /* NOTREACHED */
}
+ do {
#ifdef sudo_waitpid
- pid = sudo_waitpid(pid, &status, 0);
+ rv = sudo_waitpid(pid, &status, 0);
#else
- pid = wait(&status);
+ rv = wait(&status);
#endif
+ } while (rv == -1 && errno == EINTR);
- (void) sigprocmask(SIG_SETMASK, &oset, NULL);
-
- if (pid == -1 || !WIFEXITED(status))
+ if (rv == -1 || !WIFEXITED(status))
return(-1);
return(WEXITSTATUS(status));
}
static int
-check_syntax()
+check_syntax(sudoers_path, quiet, strict)
+ char *sudoers_path;
+ int quiet;
+ int strict;
{
+ struct stat sb;
+ int error;
- if ((yyin = fopen(sudoers.path, "r")) == NULL) {
+ if ((yyin = fopen(sudoers_path, "r")) == NULL) {
if (!quiet)
- warn("unable to open %s", sudoers.path);
+ warning("unable to open %s", sudoers_path);
exit(1);
}
- init_parser();
- if (yyparse() && parse_error != TRUE) {
+ init_parser(sudoers_path, quiet);
+ if (yyparse() && !parse_error) {
if (!quiet)
- warnx("failed to parse %s file, unknown error", sudoers.path);
+ warningx("failed to parse %s file, unknown error", sudoers_path);
parse_error = TRUE;
+ errorfile = sudoers_path;
}
- if (!quiet){
- if (parse_error)
- (void) printf("parse error in %s near line %d\n", sudoers.path,
- errorlineno);
- else
- (void) printf("%s file parsed OK\n", sudoers.path);
+ if (!parse_error && check_aliases(strict, quiet) != 0) {
+ parse_error = TRUE;
+ errorfile = sudoers_path;
}
-
- return(parse_error == TRUE);
-}
-
-static FILE *
-open_sudoers(sp)
- struct sudoersfile *sp;
-{
- struct stat sb;
- ssize_t nread;
- FILE *fp;
- char buf[PATH_MAX*2];
- int tfd;
-
- /* Open and lock sudoers. */
- sp->fd = open(sp->path, O_RDWR | O_CREAT, SUDOERS_MODE);
- if (sp->fd == -1)
- err(1, "%s", sp->path);
- if (!lock_file(sp->fd, SUDO_TLOCK))
- errx(1, "%s busy, try again later", sp->path);
- if ((fp = fdopen(sp->fd, "r")) == NULL)
- err(1, "%s", sp->path);
-
- /* Stash sudoers size and mtime. */
+ error = parse_error;
+ if (!quiet) {
+ if (parse_error) {
+ if (errorlineno != -1)
+ (void) printf("parse error in %s near line %d\n", errorfile,
+ errorlineno);
+ else
+ (void) printf("parse error in %s\n", errorfile);
+ } else {
+ (void) printf("%s: parsed OK\n", sudoers_path);
+ }
+ }
+ /* Check mode and owner in strict mode. */
#ifdef HAVE_FSTAT
- if (fstat(sp->fd, &sb) == -1)
+ if (strict && fstat(fileno(yyin), &sb) == 0)
#else
- if (stat(sp->path, &sb) == -1)
+ if (strict && stat(sudoers_path, &sb) == 0)
#endif
- err(1, "can't stat %s", sp->path);
- sp->orig_size = sb.st_size;
- sp->orig_mtim.tv_sec = mtim_getsec(sb);
- sp->orig_mtim.tv_nsec = mtim_getnsec(sb);
-
- /* Create the temp file. */
- tfd = open(sp->tpath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
- if (tfd < 0)
- err(1, "%s", sp->tpath);
+ {
+ if (sb.st_uid != SUDOERS_UID || sb.st_gid != SUDOERS_GID) {
+ error = TRUE;
+ if (!quiet) {
+ fprintf(stderr, "%s: wrong owner (uid, gid) should be (%d, %d)\n",
+ sudoers_path, SUDOERS_UID, SUDOERS_GID);
+ }
+ }
+ if ((sb.st_mode & 07777) != SUDOERS_MODE) {
+ error = TRUE;
+ if (!quiet) {
+ fprintf(stderr, "%s: bad permissions, should be mode 0%o\n",
+ sudoers_path, SUDOERS_MODE);
+ }
+ }
+ }
- /* Install signal handlers to clean up temp file if we are killed. */
- setup_signals();
+ return(error);
+}
- /* Copy sp->path -> sp->tpath. */
- if (sp->orig_size != 0) {
- while ((nread = read(sp->fd, buf, sizeof(buf))) > 0)
- if (write(tfd, buf, nread) != nread) {
- warn("write error");
- Exit(-1);
- }
+/*
+ * Used to open (and lock) the initial sudoers file and to also open
+ * any subsequent files #included via a callback from the parser.
+ */
+FILE *
+open_sudoers(path, doedit, keepopen)
+ const char *path;
+ int doedit;
+ int *keepopen;
+{
+ struct sudoersfile *entry;
+ FILE *fp;
- /* Add missing newline at EOF if needed. */
- if (nread > 0 && buf[nread - 1] != '\n') {
- buf[0] = '\n';
- write(tfd, buf, 1);
+ /* Check for existing entry */
+ tq_foreach_fwd(&sudoerslist, entry) {
+ if (strcmp(path, entry->path) == 0)
+ break;
+ }
+ if (entry == NULL) {
+ entry = emalloc(sizeof(*entry));
+ entry->path = estrdup(path);
+ entry->modified = 0;
+ entry->prev = entry;
+ entry->next = NULL;
+ entry->fd = open(entry->path, O_RDWR | O_CREAT, SUDOERS_MODE);
+ entry->tpath = NULL;
+ entry->doedit = doedit;
+ if (entry->fd == -1) {
+ warning("%s", entry->path);
+ efree(entry);
+ return(NULL);
+ }
+ if (!lock_file(entry->fd, SUDO_TLOCK))
+ errorx(1, "%s busy, try again later", entry->path);
+ if ((fp = fdopen(entry->fd, "r")) == NULL)
+ error(1, "%s", entry->path);
+ tq_append(&sudoerslist, entry);
+ } else {
+ /* Already exists, open .tmp version if there is one. */
+ if (entry->tpath != NULL) {
+ if ((fp = fopen(entry->tpath, "r")) == NULL)
+ error(1, "%s", entry->tpath);
+ } else {
+ if ((fp = fdopen(entry->fd, "r")) == NULL)
+ error(1, "%s", entry->path);
+ rewind(fp);
}
}
- (void) close(tfd);
- rewind(fp);
-
+ if (keepopen != NULL)
+ *keepopen = TRUE;
return(fp);
}
UserEditor = NULL;
else if (UserEditor) {
UserEditorArgs = get_args(UserEditor);
- if (find_path(UserEditor, &Editor, NULL, getenv("PATH")) == FOUND) {
+ if (find_path(UserEditor, &Editor, NULL, getenv("PATH"), 0) == FOUND) {
UserEditor = Editor;
} else {
if (def_env_editor) {
/* If we are honoring $EDITOR this is a fatal error. */
- warnx("specified editor (%s) doesn't exist!", UserEditor);
- Exit(-1);
+ errorx(1, "specified editor (%s) doesn't exist!", UserEditor);
} else {
/* Otherwise, just ignore $EDITOR. */
UserEditor = NULL;
if (stat(UserEditor, &user_editor_sb) != 0) {
/* Should never happen since we already checked above. */
- warn("unable to stat editor (%s)", UserEditor);
- Exit(-1);
+ error(1, "unable to stat editor (%s)", UserEditor);
}
EditorPath = estrdup(def_editor);
Editor = strtok(EditorPath, ":");
} while ((Editor = strtok(NULL, ":")));
/* Bleah, none of the editors existed! */
- if (Editor == NULL || *Editor == '\0') {
- warnx("no editor found (editor path = %s)", def_editor);
- Exit(-1);
- }
+ if (Editor == NULL || *Editor == '\0')
+ errorx(1, "no editor found (editor path = %s)", def_editor);
}
*args = EditorArgs;
return(Editor);
}
/*
- * Unlink the sudoers temp file (if it exists) and exit.
- * Used in place of a normal exit() and as a signal handler.
- * A positive parameter indicates we were called as a signal handler.
+ * Look up the hostname and set user_host and user_shost.
*/
-static RETSIGTYPE
-Exit(sig)
- int sig;
+static void
+get_hostname()
{
-#define emsg " exiting due to signal.\n"
+ char *p, thost[MAXHOSTNAMELEN + 1];
- (void) unlink(sudoers.tpath);
+ if (gethostname(thost, sizeof(thost)) != 0) {
+ user_host = user_shost = "localhost";
+ return;
+ }
+ thost[sizeof(thost) - 1] = '\0';
+ user_host = estrdup(thost);
- if (sig > 0) {
- write(STDERR_FILENO, getprogname(), strlen(getprogname()));
- write(STDERR_FILENO, emsg, sizeof(emsg) - 1);
- _exit(sig);
+ if ((p = strchr(user_host, '.'))) {
+ *p = '\0';
+ user_shost = estrdup(user_host);
+ *p = '.';
+ } else {
+ user_shost = user_host;
+ }
+}
+
+static int
+alias_remove_recursive(name, type, strict, quiet)
+ char *name;
+ int type;
+ int strict;
+ int quiet;
+{
+ struct member *m;
+ struct alias *a;
+ int error = 0;
+
+ if ((a = alias_find(name, type)) != NULL) {
+ tq_foreach_fwd(&a->members, m) {
+ if (m->type == ALIAS) {
+ if (strcmp(name, m->name) == 0) {
+ print_selfref(m->name, type, strict, quiet);
+ error = 1;
+ } else {
+ if (!alias_remove_recursive(m->name, type, strict, quiet))
+ error = 1;
+ }
+ }
+ }
}
- exit(-sig);
+ alias_seqno++;
+ a = alias_remove(name, type);
+ if (a)
+ rbinsert(alias_freelist, a);
+ return(error);
+}
+
+/*
+ * Iterate through the sudoers datastructures looking for undefined
+ * aliases or unused aliases.
+ */
+static int
+check_aliases(strict, quiet)
+ int strict;
+ int quiet;
+{
+ struct cmndspec *cs;
+ struct member *m, *binding;
+ struct privilege *priv;
+ struct userspec *us;
+ struct defaults *d;
+ int atype, error = 0;
+
+ alias_freelist = rbcreate(alias_compare);
+
+ /* Forward check. */
+ tq_foreach_fwd(&userspecs, us) {
+ tq_foreach_fwd(&us->users, m) {
+ if (m->type == ALIAS) {
+ alias_seqno++;
+ if (alias_find(m->name, USERALIAS) == NULL) {
+ print_undefined(m->name, USERALIAS, strict, quiet);
+ error++;
+ }
+ }
+ }
+ tq_foreach_fwd(&us->privileges, priv) {
+ tq_foreach_fwd(&priv->hostlist, m) {
+ if (m->type == ALIAS) {
+ alias_seqno++;
+ if (alias_find(m->name, HOSTALIAS) == NULL) {
+ print_undefined(m->name, HOSTALIAS, strict, quiet);
+ error++;
+ }
+ }
+ }
+ tq_foreach_fwd(&priv->cmndlist, cs) {
+ tq_foreach_fwd(&cs->runasuserlist, m) {
+ if (m->type == ALIAS) {
+ alias_seqno++;
+ if (alias_find(m->name, RUNASALIAS) == NULL) {
+ print_undefined(m->name, RUNASALIAS, strict, quiet);
+ error++;
+ }
+ }
+ }
+ if ((m = cs->cmnd)->type == ALIAS) {
+ alias_seqno++;
+ if (alias_find(m->name, CMNDALIAS) == NULL) {
+ print_undefined(m->name, CMNDALIAS, strict, quiet);
+ error++;
+ }
+ }
+ }
+ }
+ }
+
+ /* Reverse check (destructive) */
+ tq_foreach_fwd(&userspecs, us) {
+ tq_foreach_fwd(&us->users, m) {
+ if (m->type == ALIAS) {
+ if (!alias_remove_recursive(m->name, USERALIAS, strict, quiet))
+ error++;
+ }
+ }
+ tq_foreach_fwd(&us->privileges, priv) {
+ tq_foreach_fwd(&priv->hostlist, m) {
+ if (m->type == ALIAS)
+ if (!alias_remove_recursive(m->name, HOSTALIAS, strict,
+ quiet))
+ error++;
+ }
+ tq_foreach_fwd(&priv->cmndlist, cs) {
+ tq_foreach_fwd(&cs->runasuserlist, m) {
+ if (m->type == ALIAS)
+ if (!alias_remove_recursive(m->name, RUNASALIAS,
+ strict, quiet))
+ error++;
+ }
+ if ((m = cs->cmnd)->type == ALIAS)
+ if (!alias_remove_recursive(m->name, CMNDALIAS, strict,
+ quiet))
+ error++;
+ }
+ }
+ }
+ tq_foreach_fwd(&defaults, d) {
+ switch (d->type) {
+ case DEFAULTS_HOST:
+ atype = HOSTALIAS;
+ break;
+ case DEFAULTS_USER:
+ atype = USERALIAS;
+ break;
+ case DEFAULTS_RUNAS:
+ atype = RUNASALIAS;
+ break;
+ case DEFAULTS_CMND:
+ atype = CMNDALIAS;
+ break;
+ default:
+ continue; /* not an alias */
+ }
+ tq_foreach_fwd(&d->binding, binding) {
+ for (m = binding; m != NULL; m = m->next) {
+ if (m->type == ALIAS)
+ if (!alias_remove_recursive(m->name, atype, strict, quiet))
+ error++;
+ }
+ }
+ }
+ rbdestroy(alias_freelist, alias_free);
+
+ /* If all aliases were referenced we will have an empty tree. */
+ if (!no_aliases() && !quiet)
+ alias_apply(print_unused, strict ? "Error" : "Warning");
+
+ return (strict ? error : 0);
+}
+
+static void
+print_undefined(name, type, strict, quiet)
+ char *name;
+ int type;
+ int strict;
+ int quiet;
+{
+ if (!quiet) {
+ warningx("%s: %s_Alias `%s' referenced but not defined",
+ strict ? "Error" : "Warning",
+ type == HOSTALIAS ? "Host" : type == CMNDALIAS ? "Cmnd" :
+ type == USERALIAS ? "User" : type == RUNASALIAS ? "Runas" :
+ "Unknown", name);
+ }
+}
+
+static void
+print_selfref(name, type, strict, quiet)
+ char *name;
+ int type;
+ int strict;
+ int quiet;
+{
+ if (!quiet) {
+ warningx("%s: %s_Alias `%s' references self",
+ strict ? "Error" : "Warning",
+ type == HOSTALIAS ? "Host" : type == CMNDALIAS ? "Cmnd" :
+ type == USERALIAS ? "User" : type == RUNASALIAS ? "Runas" :
+ "Unknown", name);
+ }
+}
+
+static int
+print_unused(v1, v2)
+ void *v1;
+ void *v2;
+{
+ struct alias *a = (struct alias *)v1;
+ char *prefix = (char *)v2;
+
+ warningx("%s: unused %s_Alias %s", prefix,
+ a->type == HOSTALIAS ? "Host" : a->type == CMNDALIAS ? "Cmnd" :
+ a->type == USERALIAS ? "User" : a->type == RUNASALIAS ? "Runas" :
+ "Unknown", a->name);
+ return(0);
+}
+
+/*
+ * Unlink any sudoers temp files that remain.
+ */
+void
+cleanup(gotsignal)
+ int gotsignal;
+{
+ struct sudoersfile *sp;
+
+ tq_foreach_fwd(&sudoerslist, sp) {
+ if (sp->tpath != NULL)
+ (void) unlink(sp->tpath);
+ }
+ if (!gotsignal) {
+ sudo_endpwent();
+ sudo_endgrent();
+ }
+}
+
+/*
+ * Unlink sudoers temp files (if any) and exit.
+ */
+static RETSIGTYPE
+quit(signo)
+ int signo;
+{
+ cleanup(signo);
+#define emsg " exiting due to signal.\n"
+ write(STDERR_FILENO, getprogname(), strlen(getprogname()));
+ write(STDERR_FILENO, emsg, sizeof(emsg) - 1);
+ _exit(signo);
}
static void
projects / debian / sudo / blobdiff