--- /dev/null
+/*
+ * Copyright (c) 1993-1996,1998-2005, 2007-2011
+ * 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
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+#ifdef __linux__
+# include <sys/vfs.h>
+#endif
+#if defined(__sun) && defined(__SVR4)
+# include <sys/statvfs.h>
+#endif
+#ifndef __TANDEM
+# include <sys/file.h>
+#endif
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# include <string.h>
+#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 */
+#if TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <pwd.h>
+#include <grp.h>
+
+#include "sudoers.h"
+
+/* Status codes for timestamp_status() */
+#define TS_CURRENT 0
+#define TS_OLD 1
+#define TS_MISSING 2
+#define TS_NOFILE 3
+#define TS_ERROR 4
+
+/* Flags for timestamp_status() */
+#define TS_MAKE_DIRS 1
+#define TS_REMOVE 2
+
+/*
+ * Info stored in tty ticket from stat(2) to help with tty matching.
+ */
+static struct tty_info {
+ dev_t dev; /* ID of device tty resides on */
+ dev_t rdev; /* tty device ID */
+ ino_t ino; /* tty inode number */
+ struct timeval ctime; /* tty inode change time */
+} tty_info;
+
+static int build_timestamp(char **, char **);
+static int timestamp_status(char *, char *, char *, int);
+static char *expand_prompt(char *, char *, char *);
+static void lecture(int);
+static void update_timestamp(char *, char *);
+static bool tty_is_devpts(const char *);
+static struct passwd *get_authpw(void);
+
+/*
+ * Returns true if the user successfully authenticates, else false.
+ */
+int
+check_user(int validated, int mode)
+{
+ struct passwd *auth_pw;
+ char *timestampdir = NULL;
+ char *timestampfile = NULL;
+ char *prompt;
+ struct stat sb;
+ int status, rval = true;
+ bool need_pass = def_authenticate;
+ debug_decl(check_user, SUDO_DEBUG_AUTH)
+
+ /*
+ * Init authentication system regardless of whether we need a password.
+ * Required for proper PAM session support.
+ */
+ auth_pw = get_authpw();
+ if (sudo_auth_init(auth_pw) == -1) {
+ rval = -1;
+ goto done;
+ }
+
+ if (need_pass) {
+ /* Always need a password when -k was specified with the command. */
+ if (ISSET(mode, MODE_IGNORE_TICKET)) {
+ SET(validated, FLAG_CHECK_USER);
+ } else {
+ /*
+ * Don't prompt for the root passwd or if the user is exempt.
+ * If the user is not changing uid/gid, no need for a password.
+ */
+ if (user_uid == 0 || (user_uid == runas_pw->pw_uid &&
+ (!runas_gr || user_in_group(sudo_user.pw, runas_gr->gr_name)))
+ || user_is_exempt())
+ need_pass = false;
+ }
+ }
+ if (!need_pass)
+ goto done;
+
+ /* Stash the tty's ctime for tty ticket comparison. */
+ if (def_tty_tickets && user_ttypath && stat(user_ttypath, &sb) == 0) {
+ tty_info.dev = sb.st_dev;
+ tty_info.ino = sb.st_ino;
+ tty_info.rdev = sb.st_rdev;
+ if (tty_is_devpts(user_ttypath))
+ ctim_get(&sb, &tty_info.ctime);
+ }
+
+ if (build_timestamp(×tampdir, ×tampfile) == -1) {
+ rval = -1;
+ goto done;
+ }
+
+ status = timestamp_status(timestampdir, timestampfile, user_name,
+ TS_MAKE_DIRS);
+
+ if (status != TS_CURRENT || ISSET(validated, FLAG_CHECK_USER)) {
+ /* Bail out if we are non-interactive and a password is required */
+ if (ISSET(mode, MODE_NONINTERACTIVE)) {
+ warningx(_("sorry, a password is required to run %s"), getprogname());
+ rval = -1;
+ goto done;
+ }
+
+ /* XXX - should not lecture if askpass helper is being used. */
+ lecture(status);
+
+ /* Expand any escapes in the prompt. */
+ prompt = expand_prompt(user_prompt ? user_prompt : def_passprompt,
+ user_name, user_shost);
+
+ rval = verify_user(auth_pw, prompt);
+ }
+ /* Only update timestamp if user was validated. */
+ if (rval == true && ISSET(validated, VALIDATE_OK) &&
+ !ISSET(mode, MODE_IGNORE_TICKET) && status != TS_ERROR)
+ update_timestamp(timestampdir, timestampfile);
+ efree(timestampdir);
+ efree(timestampfile);
+
+done:
+ sudo_auth_cleanup(auth_pw);
+ pw_delref(auth_pw);
+
+ debug_return_bool(rval);
+}
+
+#define DEFAULT_LECTURE "\n" \
+ "We trust you have received the usual lecture from the local System\n" \
+ "Administrator. It usually boils down to these three things:\n\n" \
+ " #1) Respect the privacy of others.\n" \
+ " #2) Think before you type.\n" \
+ " #3) With great power comes great responsibility.\n\n"
+
+/*
+ * Standard sudo lecture.
+ */
+static void
+lecture(int status)
+{
+ FILE *fp;
+ char buf[BUFSIZ];
+ ssize_t nread;
+ struct sudo_conv_message msg;
+ struct sudo_conv_reply repl;
+ debug_decl(lecture, SUDO_DEBUG_AUTH)
+
+ if (def_lecture == never ||
+ (def_lecture == once && status != TS_MISSING && status != TS_ERROR))
+ debug_return;
+
+ memset(&msg, 0, sizeof(msg));
+ memset(&repl, 0, sizeof(repl));
+
+ if (def_lecture_file && (fp = fopen(def_lecture_file, "r")) != NULL) {
+ while ((nread = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) != 0) {
+ buf[nread] = '\0';
+ msg.msg_type = SUDO_CONV_ERROR_MSG;
+ msg.msg = buf;
+ sudo_conv(1, &msg, &repl);
+ }
+ fclose(fp);
+ } else {
+ msg.msg_type = SUDO_CONV_ERROR_MSG;
+ msg.msg = _(DEFAULT_LECTURE);
+ sudo_conv(1, &msg, &repl);
+ }
+ debug_return;
+}
+
+/*
+ * Update the time on the timestamp file/dir or create it if necessary.
+ */
+static void
+update_timestamp(char *timestampdir, char *timestampfile)
+{
+ debug_decl(update_timestamp, SUDO_DEBUG_AUTH)
+
+ /* If using tty timestamps but we have no tty there is nothing to do. */
+ if (def_tty_tickets && !user_ttypath)
+ debug_return;
+
+ if (timestamp_uid != 0)
+ set_perms(PERM_TIMESTAMP);
+ if (timestampfile) {
+ /*
+ * Store tty info in timestamp file
+ */
+ int fd = open(timestampfile, O_WRONLY|O_CREAT, 0600);
+ if (fd == -1)
+ log_error(USE_ERRNO, _("unable to open %s"), timestampfile);
+ else {
+ lock_file(fd, SUDO_LOCK);
+ if (write(fd, &tty_info, sizeof(tty_info)) != sizeof(tty_info)) {
+ log_error(USE_ERRNO, _("unable to write to %s"),
+ timestampfile);
+ }
+ close(fd);
+ }
+ } else {
+ if (touch(-1, timestampdir, NULL) == -1) {
+ if (mkdir(timestampdir, 0700) == -1) {
+ log_error(USE_ERRNO, _("unable to mkdir %s"),
+ timestampdir);
+ }
+ }
+ }
+ if (timestamp_uid != 0)
+ restore_perms();
+ debug_return;
+}
+
+/*
+ * Expand %h and %u escapes in the prompt and pass back the dynamically
+ * allocated result. Returns the same string if there are no escapes.
+ */
+static char *
+expand_prompt(char *old_prompt, char *user, char *host)
+{
+ size_t len, n;
+ int subst;
+ char *p, *np, *new_prompt, *endp;
+ debug_decl(expand_prompt, SUDO_DEBUG_AUTH)
+
+ /* How much space do we need to malloc for the prompt? */
+ subst = 0;
+ for (p = old_prompt, len = strlen(old_prompt); *p; p++) {
+ if (p[0] =='%') {
+ switch (p[1]) {
+ case 'h':
+ p++;
+ len += strlen(user_shost) - 2;
+ subst = 1;
+ break;
+ case 'H':
+ p++;
+ len += strlen(user_host) - 2;
+ subst = 1;
+ break;
+ case 'p':
+ p++;
+ if (def_rootpw)
+ len += 2;
+ else if (def_targetpw || def_runaspw)
+ len += strlen(runas_pw->pw_name) - 2;
+ else
+ len += strlen(user_name) - 2;
+ subst = 1;
+ break;
+ case 'u':
+ p++;
+ len += strlen(user_name) - 2;
+ subst = 1;
+ break;
+ case 'U':
+ p++;
+ len += strlen(runas_pw->pw_name) - 2;
+ subst = 1;
+ break;
+ case '%':
+ p++;
+ len--;
+ subst = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ if (subst) {
+ new_prompt = emalloc(++len);
+ endp = new_prompt + len;
+ for (p = old_prompt, np = new_prompt; *p; p++) {
+ if (p[0] =='%') {
+ switch (p[1]) {
+ case 'h':
+ p++;
+ n = strlcpy(np, user_shost, np - endp);
+ if (n >= np - endp)
+ goto oflow;
+ np += n;
+ continue;
+ case 'H':
+ p++;
+ n = strlcpy(np, user_host, np - endp);
+ if (n >= np - endp)
+ goto oflow;
+ np += n;
+ continue;
+ case 'p':
+ p++;
+ if (def_rootpw)
+ n = strlcpy(np, "root", np - endp);
+ else if (def_targetpw || def_runaspw)
+ n = strlcpy(np, runas_pw->pw_name, np - endp);
+ else
+ n = strlcpy(np, user_name, np - endp);
+ if (n >= np - endp)
+ goto oflow;
+ np += n;
+ continue;
+ case 'u':
+ p++;
+ n = strlcpy(np, user_name, np - endp);
+ if (n >= np - endp)
+ goto oflow;
+ np += n;
+ continue;
+ case 'U':
+ p++;
+ n = strlcpy(np, runas_pw->pw_name, np - endp);
+ if (n >= np - endp)
+ goto oflow;
+ np += n;
+ continue;
+ case '%':
+ /* convert %% -> % */
+ p++;
+ break;
+ default:
+ /* no conversion */
+ break;
+ }
+ }
+ *np++ = *p;
+ if (np >= endp)
+ goto oflow;
+ }
+ *np = '\0';
+ } else
+ new_prompt = old_prompt;
+
+ debug_return_str(new_prompt);
+
+oflow:
+ /* We pre-allocate enough space, so this should never happen. */
+ errorx(1, _("internal error, expand_prompt() overflow"));
+}
+
+/*
+ * Checks if the user is exempt from supplying a password.
+ */
+bool
+user_is_exempt(void)
+{
+ bool rval = false;
+ debug_decl(user_is_exempt, SUDO_DEBUG_AUTH)
+
+ if (def_exempt_group)
+ rval = user_in_group(sudo_user.pw, def_exempt_group);
+ debug_return_bool(rval);
+}
+
+/*
+ * Fills in timestampdir as well as timestampfile if using tty tickets.
+ */
+static int
+build_timestamp(char **timestampdir, char **timestampfile)
+{
+ char *dirparent;
+ int len;
+ debug_decl(build_timestamp, SUDO_DEBUG_AUTH)
+
+ dirparent = def_timestampdir;
+ len = easprintf(timestampdir, "%s/%s", dirparent, user_name);
+ if (len >= PATH_MAX)
+ goto bad;
+
+ /*
+ * Timestamp file may be a file in the directory or NUL to use
+ * the directory as the timestamp.
+ */
+ if (def_tty_tickets) {
+ char *p;
+
+ if ((p = strrchr(user_tty, '/')))
+ p++;
+ else
+ p = user_tty;
+ if (def_targetpw)
+ len = easprintf(timestampfile, "%s/%s/%s:%s", dirparent, user_name,
+ p, runas_pw->pw_name);
+ else
+ len = easprintf(timestampfile, "%s/%s/%s", dirparent, user_name, p);
+ if (len >= PATH_MAX)
+ goto bad;
+ } else if (def_targetpw) {
+ len = easprintf(timestampfile, "%s/%s/%s", dirparent, user_name,
+ runas_pw->pw_name);
+ if (len >= PATH_MAX)
+ goto bad;
+ } else
+ *timestampfile = NULL;
+
+ debug_return_int(len);
+bad:
+ log_fatal(0, _("timestamp path too long: %s"), *timestampfile);
+ debug_return_int(-1);
+}
+
+/*
+ * Check the timestamp file and directory and return their status.
+ */
+static int
+timestamp_status(char *timestampdir, char *timestampfile, char *user, int flags)
+{
+ struct stat sb;
+ struct timeval boottime, mtime;
+ time_t now;
+ char *dirparent = def_timestampdir;
+ int status = TS_ERROR; /* assume the worst */
+ debug_decl(timestamp_status, SUDO_DEBUG_AUTH)
+
+ if (timestamp_uid != 0)
+ set_perms(PERM_TIMESTAMP);
+
+ /*
+ * Sanity check dirparent and make it if it doesn't already exist.
+ * We start out assuming the worst (that the dir is not sane) and
+ * if it is ok upgrade the status to ``no timestamp file''.
+ * Note that we don't check the parent(s) of dirparent for
+ * sanity since the sudo dir is often just located in /tmp.
+ */
+ if (lstat(dirparent, &sb) == 0) {
+ if (!S_ISDIR(sb.st_mode))
+ log_error(0, _("%s exists but is not a directory (0%o)"),
+ dirparent, (unsigned int) sb.st_mode);
+ else if (sb.st_uid != timestamp_uid)
+ log_error(0, _("%s owned by uid %u, should be uid %u"),
+ dirparent, (unsigned int) sb.st_uid,
+ (unsigned int) timestamp_uid);
+ else if ((sb.st_mode & 0000022))
+ log_error(0,
+ _("%s writable by non-owner (0%o), should be mode 0700"),
+ dirparent, (unsigned int) sb.st_mode);
+ else {
+ if ((sb.st_mode & 0000777) != 0700)
+ (void) chmod(dirparent, 0700);
+ status = TS_MISSING;
+ }
+ } else if (errno != ENOENT) {
+ log_error(USE_ERRNO, _("unable to stat %s"), dirparent);
+ } else {
+ /* No dirparent, try to make one. */
+ if (ISSET(flags, TS_MAKE_DIRS)) {
+ if (mkdir(dirparent, S_IRWXU))
+ log_error(USE_ERRNO, _("unable to mkdir %s"),
+ dirparent);
+ else
+ status = TS_MISSING;
+ }
+ }
+ if (status == TS_ERROR)
+ goto done;
+
+ /*
+ * Sanity check the user's ticket dir. We start by downgrading
+ * the status to TS_ERROR. If the ticket dir exists and is sane
+ * this will be upgraded to TS_OLD. If the dir does not exist,
+ * it will be upgraded to TS_MISSING.
+ */
+ status = TS_ERROR; /* downgrade status again */
+ if (lstat(timestampdir, &sb) == 0) {
+ if (!S_ISDIR(sb.st_mode)) {
+ if (S_ISREG(sb.st_mode)) {
+ /* convert from old style */
+ if (unlink(timestampdir) == 0)
+ status = TS_MISSING;
+ } else
+ log_error(0, _("%s exists but is not a directory (0%o)"),
+ timestampdir, (unsigned int) sb.st_mode);
+ } else if (sb.st_uid != timestamp_uid)
+ log_error(0, _("%s owned by uid %u, should be uid %u"),
+ timestampdir, (unsigned int) sb.st_uid,
+ (unsigned int) timestamp_uid);
+ else if ((sb.st_mode & 0000022))
+ log_error(0,
+ _("%s writable by non-owner (0%o), should be mode 0700"),
+ timestampdir, (unsigned int) sb.st_mode);
+ else {
+ if ((sb.st_mode & 0000777) != 0700)
+ (void) chmod(timestampdir, 0700);
+ status = TS_OLD; /* do date check later */
+ }
+ } else if (errno != ENOENT) {
+ log_error(USE_ERRNO, _("unable to stat %s"), timestampdir);
+ } else
+ status = TS_MISSING;
+
+ /*
+ * If there is no user ticket dir, AND we are in tty ticket mode,
+ * AND the TS_MAKE_DIRS flag is set, create the user ticket dir.
+ */
+ if (status == TS_MISSING && timestampfile && ISSET(flags, TS_MAKE_DIRS)) {
+ if (mkdir(timestampdir, S_IRWXU) == -1) {
+ status = TS_ERROR;
+ log_error(USE_ERRNO, _("unable to mkdir %s"), timestampdir);
+ }
+ }
+
+ /*
+ * Sanity check the tty ticket file if it exists.
+ */
+ if (timestampfile && status != TS_ERROR) {
+ if (status != TS_MISSING)
+ status = TS_NOFILE; /* dir there, file missing */
+ if (def_tty_tickets && !user_ttypath)
+ goto done; /* no tty, always prompt */
+ if (lstat(timestampfile, &sb) == 0) {
+ if (!S_ISREG(sb.st_mode)) {
+ status = TS_ERROR;
+ log_error(0, _("%s exists but is not a regular file (0%o)"),
+ timestampfile, (unsigned int) sb.st_mode);
+ } else {
+ /* If bad uid or file mode, complain and kill the bogus file. */
+ if (sb.st_uid != timestamp_uid) {
+ log_error(0,
+ _("%s owned by uid %u, should be uid %u"),
+ timestampfile, (unsigned int) sb.st_uid,
+ (unsigned int) timestamp_uid);
+ (void) unlink(timestampfile);
+ } else if ((sb.st_mode & 0000022)) {
+ log_error(0,
+ _("%s writable by non-owner (0%o), should be mode 0600"),
+ timestampfile, (unsigned int) sb.st_mode);
+ (void) unlink(timestampfile);
+ } else {
+ /* If not mode 0600, fix it. */
+ if ((sb.st_mode & 0000777) != 0600)
+ (void) chmod(timestampfile, 0600);
+
+ /*
+ * Check for stored tty info. If the file is zero-sized
+ * it is an old-style timestamp with no tty info in it.
+ * If removing, we don't care about the contents.
+ * The actual mtime check is done later.
+ */
+ if (ISSET(flags, TS_REMOVE)) {
+ status = TS_OLD;
+ } else if (sb.st_size != 0) {
+ struct tty_info info;
+ int fd = open(timestampfile, O_RDONLY, 0644);
+ if (fd != -1) {
+ if (read(fd, &info, sizeof(info)) == sizeof(info) &&
+ memcmp(&info, &tty_info, sizeof(info)) == 0) {
+ status = TS_OLD;
+ }
+ close(fd);
+ }
+ }
+ }
+ }
+ } else if (errno != ENOENT) {
+ log_error(USE_ERRNO, _("unable to stat %s"), timestampfile);
+ status = TS_ERROR;
+ }
+ }
+
+ /*
+ * If the file/dir exists and we are not removing it, check its mtime.
+ */
+ if (status == TS_OLD && !ISSET(flags, TS_REMOVE)) {
+ mtim_get(&sb, &mtime);
+ /* Negative timeouts only expire manually (sudo -k). */
+ if (def_timestamp_timeout < 0 && mtime.tv_sec != 0)
+ status = TS_CURRENT;
+ else {
+ now = time(NULL);
+ if (def_timestamp_timeout &&
+ now - mtime.tv_sec < 60 * def_timestamp_timeout) {
+ /*
+ * Check for bogus time on the stampfile. The clock may
+ * have been set back or someone could be trying to spoof us.
+ */
+ if (mtime.tv_sec > now + 60 * def_timestamp_timeout * 2) {
+ time_t tv_sec = (time_t)mtime.tv_sec;
+ log_error(0,
+ _("timestamp too far in the future: %20.20s"),
+ 4 + ctime(&tv_sec));
+ if (timestampfile)
+ (void) unlink(timestampfile);
+ else
+ (void) rmdir(timestampdir);
+ status = TS_MISSING;
+ } else if (get_boottime(&boottime) && timevalcmp(&mtime, &boottime, <)) {
+ status = TS_OLD;
+ } else {
+ status = TS_CURRENT;
+ }
+ }
+ }
+ }
+
+done:
+ if (timestamp_uid != 0)
+ restore_perms();
+ debug_return_int(status);
+}
+
+/*
+ * Remove the timestamp ticket file/dir.
+ */
+void
+remove_timestamp(bool remove)
+{
+ struct timeval tv;
+ char *timestampdir, *timestampfile, *path;
+ int status;
+ debug_decl(remove_timestamp, SUDO_DEBUG_AUTH)
+
+ if (build_timestamp(×tampdir, ×tampfile) == -1)
+ debug_return;
+
+ status = timestamp_status(timestampdir, timestampfile, user_name,
+ TS_REMOVE);
+ if (status != TS_MISSING && status != TS_ERROR) {
+ path = timestampfile ? timestampfile : timestampdir;
+ if (remove) {
+ if (timestampfile)
+ status = unlink(timestampfile);
+ else
+ status = rmdir(timestampdir);
+ if (status == -1 && errno != ENOENT) {
+ log_error(0,
+ _("unable to remove %s (%s), will reset to the epoch"),
+ path, strerror(errno));
+ remove = false;
+ }
+ }
+ if (!remove) {
+ timevalclear(&tv);
+ if (touch(-1, path, &tv) == -1 && errno != ENOENT)
+ error(1, _("unable to reset %s to the epoch"), path);
+ }
+ }
+ efree(timestampdir);
+ efree(timestampfile);
+
+ debug_return;
+}
+
+/*
+ * Returns true if tty lives on a devpts, /dev or /devices filesystem, else
+ * false. Unlike most filesystems, the ctime of devpts nodes is not updated
+ * when the device node is written to, only when the inode's status changes,
+ * typically via the chmod, chown, link, rename, or utimes system calls.
+ * Since the ctime is "stable" in this case, we can stash it the tty ticket
+ * file and use it to determine whether the tty ticket file is stale.
+ */
+static bool
+tty_is_devpts(const char *tty)
+{
+ bool retval = false;
+#ifdef __linux__
+ struct statfs sfs;
+ debug_decl(tty_is_devpts, SUDO_DEBUG_PTY)
+
+#ifndef DEVPTS_SUPER_MAGIC
+# define DEVPTS_SUPER_MAGIC 0x1cd1
+#endif
+
+ if (statfs(tty, &sfs) == 0) {
+ if (sfs.f_type == DEVPTS_SUPER_MAGIC)
+ retval = true;
+ }
+#elif defined(__sun) && defined(__SVR4)
+ struct statvfs sfs;
+ debug_decl(tty_is_devpts, SUDO_DEBUG_PTY)
+
+ if (statvfs(tty, &sfs) == 0) {
+ if (strcmp(sfs.f_fstr, "dev") == 0 || strcmp(sfs.f_fstr, "devices") == 0)
+ retval = true;
+ }
+#else
+ debug_decl(tty_is_devpts, SUDO_DEBUG_PTY)
+#endif /* __linux__ */
+ debug_return_bool(retval);
+}
+
+/*
+ * Get passwd entry for the user we are going to authenticate as.
+ * By default, this is the user invoking sudo. In the most common
+ * case, this matches sudo_user.pw or runas_pw.
+ */
+static struct passwd *
+get_authpw(void)
+{
+ struct passwd *pw;
+ debug_decl(get_authpw, SUDO_DEBUG_AUTH)
+
+ if (def_rootpw) {
+ if ((pw = sudo_getpwuid(ROOT_UID)) == NULL)
+ log_fatal(0, _("unknown uid: %u"), ROOT_UID);
+ } else if (def_runaspw) {
+ if ((pw = sudo_getpwnam(def_runas_default)) == NULL)
+ log_fatal(0, _("unknown user: %s"), def_runas_default);
+ } else if (def_targetpw) {
+ if (runas_pw->pw_name == NULL)
+ log_fatal(NO_MAIL|MSG_ONLY, _("unknown uid: %u"),
+ (unsigned int) runas_pw->pw_uid);
+ pw_addref(runas_pw);
+ pw = runas_pw;
+ } else {
+ pw_addref(sudo_user.pw);
+ pw = sudo_user.pw;
+ }
+
+ debug_return_ptr(pw);
+}
projects / debian / sudo / blobdiff