/*
- * Copyright (c) 1996, 1998-2001 Todd C. Miller <Todd.Miller@courtesan.com>
- * All rights reserved.
+ * Copyright (c) 1996, 1998-2005 Todd C. Miller <Todd.Miller@courtesan.com>
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * 4. Products derived from this software may not be called "Sudo" nor
- * may "Sudo" appear in their names without specific prior written
- * permission from the author.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
/*
* Lock the sudoers file for safe editing (ala vipw) and check for parse errors.
*/
-#include "config.h"
+#define _SUDO_MAIN
+
+#ifdef __TANDEM
+# include <floss.h>
+#endif
+
+#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
-#include <sys/file.h>
+#include <sys/time.h>
+#ifndef __TANDEM
+# include <sys/file.h>
+#endif
#include <sys/wait.h>
#include <stdio.h>
#ifdef STDC_HEADERS
#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>
-#include <time.h>
+#if TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
+#ifndef HAVE_TIMESPEC
+# include <emul/timespec.h>
+#endif
#include "sudo.h"
#include "version.h"
#ifndef lint
-static const char rcsid[] = "$Sudo: visudo.c,v 1.146 2002/01/17 15:35:54 millert Exp $";
+__unused static const char rcsid[] = "$Sudo: visudo.c,v 1.166.2.10 2007/09/01 13:39:13 millert Exp $";
#endif /* lint */
+struct sudoersfile {
+ char *path;
+ char *tpath;
+ int fd;
+ off_t orig_size;
+ struct timespec orig_mtim;
+};
+
/*
* Function prototypes
*/
-static void usage __P((void));
+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 int check_syntax __P((int));
-int command_matches __P((char *, char *, char *, char *));
+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 *));
+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 *));
/*
* External globals exported by the parser
*/
-extern FILE *yyin, *yyout;
+extern FILE *yyin;
extern int errorlineno;
extern int pedantic;
extern int quiet;
* Globals
*/
char **Argv;
-char *sudoers = _PATH_SUDOERS;
-char *stmp = _PATH_SUDOERS_TMP;
struct sudo_user sudo_user;
-int parse_error = FALSE;
+int Argc, parse_error = FALSE;
+static struct sudoersfile sudoers;
int
main(argc, argv)
int argc;
char **argv;
{
- char buf[MAXPATHLEN*2]; /* buffer used for copying files */
- char *Editor; /* editor to use */
- char *UserEditor; /* editor user wants to use */
- char *EditorPath; /* colon-separated list of editors */
- char *av[4]; /* argument vector for run_command */
- int checkonly; /* only check existing file? */
- int sudoers_fd; /* sudoers file descriptor */
- int stmp_fd; /* stmp file descriptor */
- int n; /* length parameter */
- int ch; /* getopt char */
- time_t now; /* time now */
- struct stat stmp_sb, sudoers_sb; /* to check for changes */
+ 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;
- /*
- * Parse command line options
- */
Argv = argv;
+ if ((Argc = argc) < 1)
+ usage();
/*
* Arg handling.
*/
- checkonly = 0;
+ checkonly = oldperms = FALSE;
while ((ch = getopt(argc, argv, "Vcf:sq")) != -1) {
switch (ch) {
case 'V':
- (void) printf("visudo version %s\n", version);
+ (void) printf("%s version %s\n", getprogname(), version);
exit(0);
case 'c':
checkonly++; /* check mode */
break;
- case 'f':
- sudoers = optarg; /* sudoers file path */
- easprintf(&stmp, "%s.tmp", optarg);
+ case 'f': /* sudoers file path */
+ sudoers.path = optarg;
+ easprintf(&sudoers.tpath, "%s.tmp", optarg);
+ oldperms = TRUE;
break;
case 's':
pedantic++; /* strict mode */
/* Mock up a fake sudo_user struct. */
user_host = user_shost = user_cmnd = "";
- if ((sudo_user.pw = getpwuid(getuid())) == NULL) {
- (void) fprintf(stderr, "%s: Can't find you in the passwd database.\n",
- Argv[0]);
- exit(1);
- }
+ if ((sudo_user.pw = getpwuid(getuid())) == NULL)
+ errx(1, "you don't exist in the passwd database");
/* Setup defaults data structures. */
init_defaults();
if (checkonly)
- exit(check_syntax(quiet));
+ exit(check_syntax());
/*
- * Open sudoers, lock it and stat it.
- * sudoers_fd must remain open throughout in order to hold the lock.
- */
- sudoers_fd = open(sudoers, O_RDWR | O_CREAT, SUDOERS_MODE);
- if (sudoers_fd == -1) {
- (void) fprintf(stderr, "%s: %s: %s\n", Argv[0], sudoers,
- strerror(errno));
- exit(1);
- }
- if (!lock_file(sudoers_fd, SUDO_TLOCK)) {
- (void) fprintf(stderr, "%s: sudoers file busy, try again later.\n",
- Argv[0]);
- exit(1);
- }
-#ifdef HAVE_FSTAT
- if (fstat(sudoers_fd, &sudoers_sb) == -1) {
-#else
- if (stat(sudoers, &sudoers_sb) == -1) {
-#endif
- (void) fprintf(stderr, "%s: can't stat %s: %s\n",
- Argv[0], sudoers, strerror(errno));
- exit(1);
- }
+ * 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();
+ yyparse();
+ parse_error = FALSE;
+ quiet = n;
- /*
- * Open sudoers temp file.
- */
- stmp_fd = open(stmp, O_WRONLY | O_CREAT | O_TRUNC, 0600);
- if (stmp_fd < 0) {
- (void) fprintf(stderr, "%s: %s: %s\n", Argv[0], stmp, strerror(errno));
- exit(1);
- }
+ /* Edit sudoers, check for parse errors and re-edit on failure. */
+ editor = get_editor(&args);
+ visudo(&sudoers, editor, args);
- /* Install signal handlers to clean up stmp if we are killed. */
- setup_signals();
+ /* Install the new sudoers file. */
+ install_sudoers(&sudoers, oldperms);
- /* Copy sudoers -> stmp and reset the mtime */
- if (sudoers_sb.st_size) {
- while ((n = read(sudoers_fd, buf, sizeof(buf))) > 0)
- if (write(stmp_fd, buf, n) != n) {
- (void) fprintf(stderr, "%s: Write failed: %s\n", Argv[0],
- strerror(errno));
- Exit(-1);
- }
+ exit(0);
+}
- (void) close(stmp_fd);
- (void) touch(stmp, sudoers_sb.st_mtime);
-
- /* Parse sudoers to pull in editor and env_editor conf values. */
- if ((yyin = fopen(stmp, "r"))) {
- yyout = stdout;
- init_parser();
- yyparse();
- parse_error = FALSE;
- yyrestart(yyin);
- fclose(yyin);
- }
- } else
- (void) close(stmp_fd);
+/*
+ * Edit the sudoers file.
+ * Returns TRUE on success, else FALSE.
+ */
+static void
+edit_sudoers(sp, editor, args, lineno)
+ struct sudoersfile *sp;
+ char *editor, *args;
+ int lineno;
+{
+ int ac; /* argument count */
+ char **av; /* argument vector for run_command */
+ char *cp; /* scratch char pointer */
+ char linestr[64]; /* string version of lineno */
+ struct timespec ts1, ts2; /* time before and after edit */
+ struct stat sb; /* stat buffer */
+
+ /* Make timestamp on temp file match original. */
+ (void) touch(-1, sp->tpath, &sp->orig_mtim);
+
+ /* Find the length of the argument vector */
+ ac = 3 + (lineno > 0);
+ if (args) {
+ int wasblank;
+
+ ac++;
+ for (wasblank = FALSE, cp = args; *cp; cp++) {
+ if (isblank((unsigned char) *cp))
+ wasblank = TRUE;
+ else if (wasblank) {
+ wasblank = FALSE;
+ ac++;
+ }
+ }
+ }
- /*
- * Check EDITOR and VISUAL environment variables to see which editor
- * the user wants to use (we may not end up using it though).
- * If the path is not fully-qualified, make it so and check that
- * the specified executable actually exists.
- */
- if ((UserEditor = getenv("EDITOR")) == NULL || *UserEditor == '\0')
- UserEditor = getenv("VISUAL");
- if (UserEditor && *UserEditor == '\0')
- UserEditor = NULL;
- else if (UserEditor) {
- if (find_path(UserEditor, &Editor, getenv("PATH")) == FOUND) {
- UserEditor = Editor;
- } else {
- if (def_flag(I_ENV_EDITOR)) {
- /* If we are honoring $EDITOR this is a fatal error. */
- (void) fprintf(stderr,
- "%s: specified editor (%s) doesn't exist!\n",
- Argv[0], UserEditor);
- Exit(-1);
- } else {
- /* Otherwise, just ignore $EDITOR. */
- UserEditor = NULL;
- }
- }
+ /* Build up argument vector for the command */
+ av = emalloc2(ac, sizeof(char *));
+ if ((av[0] = strrchr(editor, '/')) != NULL)
+ av[0]++;
+ else
+ av[0] = editor;
+ ac = 1;
+ if (lineno > 0) {
+ (void) snprintf(linestr, sizeof(linestr), "+%d", lineno);
+ av[ac++] = linestr;
+ }
+ if (args) {
+ for ((cp = strtok(args, " \t")); cp; (cp = strtok(NULL, " \t")))
+ av[ac++] = cp;
}
+ av[ac++] = sp->tpath;
+ av[ac++] = NULL;
/*
- * See if we can use the user's choice of editors either because
- * we allow any $EDITOR or because $EDITOR is in the allowable list.
+ * Do the edit:
+ * We cannot check the editor's exit value against 0 since
+ * XPG4 specifies that vi's exit value is a function of the
+ * number of errors during editing (?!?!).
*/
- Editor = EditorPath = NULL;
- if (def_flag(I_ENV_EDITOR) && UserEditor)
- Editor = UserEditor;
- else if (UserEditor) {
- struct stat editor_sb;
- struct stat user_editor_sb;
- char *base, *userbase;
-
- if (stat(UserEditor, &user_editor_sb) != 0) {
- /* Should never happen since we already checked above. */
- (void) fprintf(stderr, "%s: unable to stat editor (%s): %s\n",
- Argv[0], UserEditor, strerror(errno));
+ gettime(&ts1);
+ if (run_command(editor, av) != -1) {
+ gettime(&ts2);
+ /*
+ * Sanity checks.
+ */
+ if (stat(sp->tpath, &sb) < 0) {
+ warnx("cannot stat temporary file (%s), %s unchanged",
+ sp->tpath, sp->path);
Exit(-1);
}
- EditorPath = estrdup(def_str(I_EDITOR));
- Editor = strtok(EditorPath, ":");
- do {
- /*
- * Both Editor and UserEditor should be fully qualified but
- * check anyway...
- */
- if ((base = strrchr(Editor, '/')) == NULL)
- continue;
- if ((userbase = strrchr(UserEditor, '/')) == NULL) {
- Editor = NULL;
- break;
- }
- base++, userbase++;
-
- /*
- * We compare the basenames first and then use stat to match
- * for sure.
- */
- if (strcmp(base, userbase) == 0) {
- if (stat(Editor, &editor_sb) == 0 && S_ISREG(editor_sb.st_mode)
- && (editor_sb.st_mode & 0000111) &&
- editor_sb.st_dev == user_editor_sb.st_dev &&
- editor_sb.st_ino == user_editor_sb.st_ino)
- break;
- }
- } while ((Editor = strtok(NULL, ":")));
+ if (sb.st_size == 0) {
+ warnx("zero length temporary file (%s), %s unchanged",
+ sp->tpath, sp->path);
+ Exit(-1);
+ }
+ } else {
+ warnx("editor (%s) failed, %s unchanged", editor, sp->path);
+ Exit(-1);
}
- /*
- * Can't use $EDITOR, try each element of I_EDITOR until we
- * find one that exists, is regular, and is executable.
- */
- if (Editor == NULL || *Editor == '\0') {
- if (EditorPath != NULL)
- free(EditorPath);
- EditorPath = estrdup(def_str(I_EDITOR));
- Editor = strtok(EditorPath, ":");
- do {
- if (sudo_goodpath(Editor))
- break;
- } while ((Editor = strtok(NULL, ":")));
-
- /* Bleah, none of the editors existed! */
- if (Editor == NULL || *Editor == '\0') {
- (void) fprintf(stderr, "%s: no editor found (editor path = %s)\n",
- Argv[0], def_str(I_EDITOR));
- Exit(-1);
+ /* 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)) {
+ /*
+ * 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);
}
}
+}
+
+/*
+ * 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;
+ char *editor, *args;
+{
+ int ch;
/*
- * Edit the temp file and parse it (for sanity checking)
+ * Parse the edited sudoers file and do sanity checking
*/
do {
- char linestr[64];
+ edit_sudoers(sp, editor, args, errorlineno);
- /* Build up argument vector for the command */
- if ((av[0] = strrchr(Editor, '/')) != NULL)
- av[0]++;
- else
- av[0] = Editor;
- n = 1;
- if (parse_error == TRUE) {
- (void) snprintf(linestr, sizeof(linestr), "+%d", errorlineno);
- av[n++] = linestr;
+ yyin = fopen(sp->tpath, "r+");
+ if (yyin == NULL) {
+ warnx("can't re-open temporary file (%s), %s unchanged.",
+ sp->tpath, sp->path);
+ Exit(-1);
}
- av[n++] = stmp;
- av[n++] = NULL;
- /*
- * Do the edit:
- * We cannot check the editor's exit value against 0 since
- * XPG4 specifies that vi's exit value is a function of the
- * number of errors during editing (?!?!).
- */
- now = time(NULL);
- if (run_command(Editor, av) != -1) {
- /*
- * Sanity checks.
- */
- if (stat(stmp, &stmp_sb) < 0) {
- (void) fprintf(stderr,
- "%s: Can't stat temporary file (%s), %s unchanged.\n",
- Argv[0], stmp, sudoers);
- Exit(-1);
- }
- if (stmp_sb.st_size == 0) {
- (void) fprintf(stderr,
- "%s: Zero length temporary file (%s), %s unchanged.\n",
- Argv[0], stmp, sudoers);
- Exit(-1);
- }
-
- /*
- * Passed sanity checks so reopen stmp file and check
- * for parse errors.
- */
- yyout = stdout;
- if (parse_error)
- yyin = freopen(stmp, "r", yyin);
- else
- yyin = fopen(stmp, "r");
- if (yyin == NULL) {
- (void) fprintf(stderr,
- "%s: Can't re-open temporary file (%s), %s unchanged.\n",
- Argv[0], stmp, sudoers);
- Exit(-1);
- }
-
- /* Clean slate for each parse */
- user_runas = NULL;
- init_defaults();
- init_parser();
-
- /* Parse the sudoers file */
- if (yyparse() && parse_error != TRUE) {
- (void) fprintf(stderr,
- "%s: Failed to parse temporary file (%s), unknown error.\n",
- Argv[0], stmp);
- parse_error = TRUE;
- }
- } else {
- (void) fprintf(stderr,
- "%s: Editor (%s) failed, %s unchanged.\n", Argv[0],
- Editor, sudoers);
- 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();
+
+ /* Parse the sudoers temp file */
+ yyrestart(yyin);
+ if (yyparse() && parse_error != TRUE) {
+ warnx("unabled to parse temporary file (%s), unknown error",
+ sp->tpath);
+ parse_error = TRUE;
}
+ fclose(yyin);
/*
* Got an error, prompt the user for what to do now
*/
- if (parse_error == TRUE) {
+ if (parse_error) {
switch (whatnow()) {
case 'Q' : parse_error = FALSE; /* ignore parse error */
break;
- case 'x' : if (sudoers_sb.st_size == 0)
- unlink(sudoers);
- Exit(0);
+ case 'x' : Exit(0);
break;
}
- yyrestart(yyin); /* reset lexer */
}
- } while (parse_error == TRUE);
+ } while (parse_error);
+}
- /*
- * If the user didn't change the temp file, just unlink it.
- */
- if (sudoers_sb.st_mtime != now && sudoers_sb.st_mtime == stmp_sb.st_mtime &&
- sudoers_sb.st_size == stmp_sb.st_size) {
- (void) fprintf(stderr, "%s: sudoers file unchanged.\n", Argv[0]);
- Exit(0);
- }
+/*
+ * Set the owner and mode on a sudoers temp file and
+ * move it into place. Returns TRUE on success, else FALSE.
+ */
+static void
+install_sudoers(sp, oldperms)
+ struct sudoersfile *sp;
+ int oldperms;
+{
+ struct stat sb;
/*
* Change mode and ownership of temp file so when
- * we move it to sudoers things are kosher.
+ * we move it to sp->path things are kosher.
*/
- if (chown(stmp, SUDOERS_UID, SUDOERS_GID)) {
- (void) fprintf(stderr,
- "%s: Unable to set (uid, gid) of %s to (%d, %d): %s\n",
- Argv[0], stmp, SUDOERS_UID, SUDOERS_GID, strerror(errno));
- Exit(-1);
- }
- if (chmod(stmp, SUDOERS_MODE)) {
- (void) fprintf(stderr,
- "%s: Unable to change mode of %s to %o: %s\n",
- Argv[0], stmp, SUDOERS_MODE, strerror(errno));
- Exit(-1);
+ if (oldperms) {
+ /* Use perms of the existing file. */
+#ifdef HAVE_FSTAT
+ if (fstat(sp->fd, &sb) == -1)
+#else
+ if (stat(sp->path, &sb) == -1)
+#endif
+ err(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)",
+ sp->tpath, SUDOERS_UID, SUDOERS_GID);
+ Exit(-1);
+ }
+ if (chmod(sp->tpath, SUDOERS_MODE) != 0) {
+ warn("unable to change mode of %s to 0%o", sp->tpath, SUDOERS_MODE);
+ Exit(-1);
+ }
}
/*
- * Now that we have a sane stmp file (parses ok) it needs to be
- * rename(2)'d to sudoers. If the rename(2) fails we try using
- * mv(1) in case stmp and sudoers are on different filesystems.
+ * Now that sp->tpath is sane (parses ok) it needs to be
+ * 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(stmp, sudoers)) {
+ if (rename(sp->tpath, sp->path) != 0) {
if (errno == EXDEV) {
- (void) fprintf(stderr,
- "%s: %s and %s not on the same filesystem, using mv to rename.\n",
- Argv[0], stmp, sudoers);
+ char *av[4];
+ warnx("%s and %s not on the same file system, using mv to rename",
+ sp->tpath, sp->path);
/* Build up argument vector for the command */
if ((av[0] = strrchr(_PATH_MV, '/')) != NULL)
av[0]++;
else
av[0] = _PATH_MV;
- av[1] = stmp;
- av[2] = sudoers;
+ av[1] = sp->tpath;
+ av[2] = sp->path;
av[3] = NULL;
/* And run it... */
if (run_command(_PATH_MV, av)) {
- (void) fprintf(stderr,
- "%s: Command failed: '%s %s %s', %s unchanged.\n",
- Argv[0], _PATH_MV, stmp, sudoers, sudoers);
+ warnx("command failed: '%s %s %s', %s unchanged",
+ _PATH_MV, sp->tpath, sp->path, sp->path);
Exit(-1);
}
} else {
- (void) fprintf(stderr, "%s: Error renaming %s, %s unchanged: %s\n",
- Argv[0], stmp, sudoers, strerror(errno));
+ warn("error renaming %s, %s unchanged", sp->tpath, sp->path);
Exit(-1);
}
}
-
- exit(0);
}
/*
* These exist to allow us to use the same parser as sudo(8).
*/
int
-command_matches(cmnd, cmnd_args, path, sudoers_args)
- char *cmnd;
- char *cmnd_args;
+command_matches(path, sudoers_args)
char *path;
char *sudoers_args;
{
}
int
-usergr_matches(g, u)
+usergr_matches(g, u, pw)
char *g, *u;
+ struct passwd *pw;
+{
+ return(TRUE);
+}
+
+int
+userpw_matches(s, u, pw)
+ char *s, *u;
+ struct passwd *pw;
{
return(TRUE);
}
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()
{
switch (pid = fork()) {
case -1:
- (void) fprintf(stderr,
- "%s: unable to run %s: %s\n", Argv[0], path, strerror(errno));
+ warn("unable to run %s", path);
Exit(-1);
break; /* NOTREACHED */
case 0:
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
+ endpwent();
+ closefrom(STDERR_FILENO + 1);
execv(path, argv);
- (void) fprintf(stderr,
- "%s: unable to run %s: %s\n", Argv[0], path, strerror(errno));
+ warn("unable to run %s", path);
_exit(127);
break; /* NOTREACHED */
}
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
- /* XXX - should use WEXITSTATUS() */
- return(pid == -1 ? -1 : (status >> 8));
+ if (pid == -1 || !WIFEXITED(status))
+ return(-1);
+ return(WEXITSTATUS(status));
}
static int
-check_syntax(quiet)
- int quiet;
+check_syntax()
{
- if ((yyin = fopen(sudoers, "r")) == NULL) {
+ if ((yyin = fopen(sudoers.path, "r")) == NULL) {
if (!quiet)
- (void) fprintf(stderr, "%s: unable to open %s: %s\n", Argv[0],
- sudoers, strerror(errno));
+ warn("unable to open %s", sudoers.path);
exit(1);
}
- yyout = stdout;
init_parser();
if (yyparse() && parse_error != TRUE) {
if (!quiet)
- (void) fprintf(stderr,
- "%s: failed to parse %s file, unknown error.\n",
- Argv[0], sudoers);
+ warnx("failed to parse %s file, unknown error", sudoers.path);
parse_error = TRUE;
}
if (!quiet){
if (parse_error)
- (void) printf("parse error in %s near line %d\n", sudoers,
+ (void) printf("parse error in %s near line %d\n", sudoers.path,
errorlineno);
else
- (void) printf("%s file parsed OK\n", sudoers);
+ (void) printf("%s file parsed OK\n", 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. */
+#ifdef HAVE_FSTAT
+ if (fstat(sp->fd, &sb) == -1)
+#else
+ if (stat(sp->path, &sb) == -1)
+#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);
+
+ /* Install signal handlers to clean up temp file if we are killed. */
+ setup_signals();
+
+ /* 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);
+ }
+
+ /* Add missing newline at EOF if needed. */
+ if (nread > 0 && buf[nread - 1] != '\n') {
+ buf[0] = '\n';
+ write(tfd, buf, 1);
+ }
+ }
+ (void) close(tfd);
+ rewind(fp);
+
+ return(fp);
+}
+
+static char *
+get_editor(args)
+ char **args;
+{
+ char *Editor, *EditorArgs, *EditorPath, *UserEditor, *UserEditorArgs;
+
+ /*
+ * Check VISUAL and EDITOR environment variables to see which editor
+ * the user wants to use (we may not end up using it though).
+ * If the path is not fully-qualified, make it so and check that
+ * the specified executable actually exists.
+ */
+ UserEditorArgs = NULL;
+ if ((UserEditor = getenv("VISUAL")) == NULL || *UserEditor == '\0')
+ UserEditor = getenv("EDITOR");
+ if (UserEditor && *UserEditor == '\0')
+ UserEditor = NULL;
+ else if (UserEditor) {
+ UserEditorArgs = get_args(UserEditor);
+ if (find_path(UserEditor, &Editor, NULL, getenv("PATH")) == 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);
+ } else {
+ /* Otherwise, just ignore $EDITOR. */
+ UserEditor = NULL;
+ }
+ }
+ }
+
+ /*
+ * See if we can use the user's choice of editors either because
+ * we allow any $EDITOR or because $EDITOR is in the allowable list.
+ */
+ Editor = EditorArgs = EditorPath = NULL;
+ if (def_env_editor && UserEditor) {
+ Editor = UserEditor;
+ EditorArgs = UserEditorArgs;
+ } else if (UserEditor) {
+ struct stat editor_sb;
+ struct stat user_editor_sb;
+ char *base, *userbase;
+
+ if (stat(UserEditor, &user_editor_sb) != 0) {
+ /* Should never happen since we already checked above. */
+ warn("unable to stat editor (%s)", UserEditor);
+ Exit(-1);
+ }
+ EditorPath = estrdup(def_editor);
+ Editor = strtok(EditorPath, ":");
+ do {
+ EditorArgs = get_args(Editor);
+ /*
+ * Both Editor and UserEditor should be fully qualified but
+ * check anyway...
+ */
+ if ((base = strrchr(Editor, '/')) == NULL)
+ continue;
+ if ((userbase = strrchr(UserEditor, '/')) == NULL) {
+ Editor = NULL;
+ break;
+ }
+ base++, userbase++;
+
+ /*
+ * We compare the basenames first and then use stat to match
+ * for sure.
+ */
+ if (strcmp(base, userbase) == 0) {
+ if (stat(Editor, &editor_sb) == 0 && S_ISREG(editor_sb.st_mode)
+ && (editor_sb.st_mode & 0000111) &&
+ editor_sb.st_dev == user_editor_sb.st_dev &&
+ editor_sb.st_ino == user_editor_sb.st_ino)
+ break;
+ }
+ } while ((Editor = strtok(NULL, ":")));
+ }
+
+ /*
+ * Can't use $EDITOR, try each element of def_editor until we
+ * find one that exists, is regular, and is executable.
+ */
+ if (Editor == NULL || *Editor == '\0') {
+ efree(EditorPath);
+ EditorPath = estrdup(def_editor);
+ Editor = strtok(EditorPath, ":");
+ do {
+ EditorArgs = get_args(Editor);
+ if (sudo_goodpath(Editor, NULL))
+ break;
+ } 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);
+ }
+ }
+ *args = EditorArgs;
+ return(Editor);
+}
+
+/*
+ * Split out any command line arguments and return them.
+ */
+static char *
+get_args(cmnd)
+ char *cmnd;
+{
+ char *args;
+
+ args = cmnd;
+ while (*args && !isblank((unsigned char) *args))
+ args++;
+ if (*args) {
+ *args++ = '\0';
+ while (*args && isblank((unsigned char) *args))
+ args++;
+ }
+ return(*args ? args : NULL);
+}
+
/*
* Unlink the sudoers temp file (if it exists) and exit.
* Used in place of a normal exit() and as a signal handler.
Exit(sig)
int sig;
{
- char *emsg = " exiting due to signal.\n";
+#define emsg " exiting due to signal.\n"
- (void) unlink(stmp);
+ (void) unlink(sudoers.tpath);
if (sig > 0) {
- write(STDERR_FILENO, Argv[0], strlen(Argv[0]));
+ write(STDERR_FILENO, getprogname(), strlen(getprogname()));
write(STDERR_FILENO, emsg, sizeof(emsg) - 1);
- _exit(-sig);
+ _exit(sig);
}
exit(-sig);
}
static void
usage()
{
- (void) fprintf(stderr, "usage: %s [-c] [-f sudoers] [-q] [-s] [-V]\n",
- Argv[0]);
+ (void) fprintf(stderr, "usage: %s [-c] [-q] [-s] [-V] [-f sudoers]\n",
+ getprogname());
exit(1);
}
projects / debian / sudo / blobdiff