+++ /dev/null
-/*
- * Copyright (c) 1994-1996, 1998-2010 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
- * 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.
- */
-
-#ifdef __TANDEM
-# include <floss.h>
-#endif
-
-#include <config.h>
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/wait.h>
-#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 */
-#include <pwd.h>
-#include <grp.h>
-#include <signal.h>
-#include <time.h>
-#include <errno.h>
-#include <fcntl.h>
-
-#include "sudo.h"
-
-static void do_syslog __P((int, char *));
-static void do_logfile __P((char *));
-static void send_mail __P((const char *fmt, ...));
-static int should_mail __P((int));
-static void mysyslog __P((int, const char *, ...));
-static char *new_logline __P((const char *, int));
-
-#define MAXSYSLOGTRIES 16 /* num of retries for broken syslogs */
-
-/*
- * We do an openlog(3)/closelog(3) for each message because some
- * authentication methods (notably PAM) use syslog(3) for their
- * own nefarious purposes and may call openlog(3) and closelog(3).
- * Note that because we don't want to assume that all systems have
- * vsyslog(3) (HP-UX doesn't) "%m" will not be expanded.
- * Sadly this is a maze of #ifdefs.
- */
-static void
-#ifdef __STDC__
-mysyslog(int pri, const char *fmt, ...)
-#else
-mysyslog(pri, fmt, va_alist)
- int pri;
- const char *fmt;
- va_dcl
-#endif
-{
-#ifdef BROKEN_SYSLOG
- int i;
-#endif
- char buf[MAXSYSLOGLEN+1];
- va_list ap;
-
-#ifdef __STDC__
- va_start(ap, fmt);
-#else
- va_start(ap);
-#endif
-#ifdef LOG_NFACILITIES
- openlog("sudo", 0, def_syslog);
-#else
- openlog("sudo", 0);
-#endif
- vsnprintf(buf, sizeof(buf), fmt, ap);
-#ifdef BROKEN_SYSLOG
- /*
- * Some versions of syslog(3) don't guarantee success and return
- * an int (notably HP-UX < 10.0). So, if at first we don't succeed,
- * try, try again...
- */
- for (i = 0; i < MAXSYSLOGTRIES; i++)
- if (syslog(pri, "%s", buf) == 0)
- break;
-#else
- syslog(pri, "%s", buf);
-#endif /* BROKEN_SYSLOG */
- va_end(ap);
- closelog();
-}
-
-#define FMT_FIRST "%8s : %s"
-#define FMT_CONTD "%8s : (command continued) %s"
-
-/*
- * Log a message to syslog, pre-pending the username and splitting the
- * message into parts if it is longer than MAXSYSLOGLEN.
- */
-static void
-do_syslog(pri, msg)
- int pri;
- char *msg;
-{
- size_t len, maxlen;
- char *p, *tmp, save;
- const char *fmt;
-
- /*
- * Log the full line, breaking into multiple syslog(3) calls if necessary
- */
- fmt = FMT_FIRST;
- maxlen = MAXSYSLOGLEN - (sizeof(FMT_FIRST) - 6 + strlen(user_name));
- for (p = msg; *p != '\0'; ) {
- len = strlen(p);
- if (len > maxlen) {
- /*
- * Break up the line into what will fit on one syslog(3) line
- * Try to avoid breaking words into several lines if possible.
- */
- tmp = memrchr(p, ' ', maxlen);
- if (tmp == NULL)
- tmp = p + maxlen;
-
- /* NULL terminate line, but save the char to restore later */
- save = *tmp;
- *tmp = '\0';
-
- mysyslog(pri, fmt, user_name, p);
-
- *tmp = save; /* restore saved character */
-
- /* Advance p and eliminate leading whitespace */
- for (p = tmp; *p == ' '; p++)
- ;
- } else {
- mysyslog(pri, fmt, user_name, p);
- p += len;
- }
- fmt = FMT_CONTD;
- maxlen = MAXSYSLOGLEN - (sizeof(FMT_CONTD) - 6 + strlen(user_name));
- }
-}
-
-static void
-do_logfile(msg)
- char *msg;
-{
- char *full_line;
- char *beg, *oldend, *end;
- FILE *fp;
- mode_t oldmask;
- size_t maxlen;
-
- oldmask = umask(077);
- maxlen = def_loglinelen > 0 ? def_loglinelen : 0;
- fp = fopen(def_logfile, "a");
- (void) umask(oldmask);
- if (fp == NULL) {
- send_mail("Can't open log file: %s: %s", def_logfile, strerror(errno));
- } else if (!lock_file(fileno(fp), SUDO_LOCK)) {
- send_mail("Can't lock log file: %s: %s", def_logfile, strerror(errno));
- } else {
- time_t now;
-
- now = time(NULL);
- if (def_loglinelen == 0) {
- /* Don't pretty-print long log file lines (hard to grep) */
- if (def_log_host)
- (void) fprintf(fp, "%s : %s : HOST=%s : %s\n",
- get_timestr(now, def_log_year), user_name, user_shost, msg);
- else
- (void) fprintf(fp, "%s : %s : %s\n",
- get_timestr(now, def_log_year), user_name, msg);
- } else {
- if (def_log_host)
- easprintf(&full_line, "%s : %s : HOST=%s : %s",
- get_timestr(now, def_log_year), user_name, user_shost, msg);
- else
- easprintf(&full_line, "%s : %s : %s",
- get_timestr(now, def_log_year), user_name, msg);
-
- /*
- * Print out full_line with word wrap
- */
- beg = end = full_line;
- while (beg) {
- oldend = end;
- end = strchr(oldend, ' ');
-
- if (maxlen > 0 && end) {
- *end = '\0';
- if (strlen(beg) > maxlen) {
- /* too far, need to back up & print the line */
-
- if (beg == (char *)full_line)
- maxlen -= 4; /* don't indent first line */
-
- *end = ' ';
- if (oldend != beg) {
- /* rewind & print */
- end = oldend-1;
- while (*end == ' ')
- --end;
- *(++end) = '\0';
- (void) fprintf(fp, "%s\n ", beg);
- *end = ' ';
- } else {
- (void) fprintf(fp, "%s\n ", beg);
- }
-
- /* reset beg to point to the start of the new substr */
- beg = end;
- while (*beg == ' ')
- ++beg;
- } else {
- /* we still have room */
- *end = ' ';
- }
-
- /* remove leading whitespace */
- while (*end == ' ')
- ++end;
- } else {
- /* final line */
- (void) fprintf(fp, "%s\n", beg);
- beg = NULL; /* exit condition */
- }
- }
- efree(full_line);
- }
- (void) fflush(fp);
- (void) lock_file(fileno(fp), SUDO_UNLOCK);
- (void) fclose(fp);
- }
-}
-
-/*
- * Log and mail the denial message, optionally informing the user.
- */
-void
-log_denial(status, inform_user)
- int status;
- int inform_user;
-{
- char *message;
- char *logline;
-
- /* Set error message. */
- if (ISSET(status, FLAG_NO_USER))
- message = "user NOT in sudoers";
- else if (ISSET(status, FLAG_NO_HOST))
- message = "user NOT authorized on host";
- else
- message = "command not allowed";
-
- logline = new_logline(message, 0);
-
- if (should_mail(status))
- send_mail("%s", logline); /* send mail based on status */
-
- /* Inform the user if they failed to authenticate. */
- if (inform_user) {
- if (ISSET(status, FLAG_NO_USER))
- (void) fprintf(stderr, "%s is not in the sudoers file. %s",
- user_name, "This incident will be reported.\n");
- else if (ISSET(status, FLAG_NO_HOST))
- (void) fprintf(stderr, "%s is not allowed to run sudo on %s. %s",
- user_name, user_shost, "This incident will be reported.\n");
- else if (ISSET(status, FLAG_NO_CHECK))
- (void) fprintf(stderr, "Sorry, user %s may not run sudo on %s.\n",
- user_name, user_shost);
- else
- (void) fprintf(stderr,
- "Sorry, user %s is not allowed to execute '%s%s%s' as %s%s%s on %s.\n",
- user_name, user_cmnd, user_args ? " " : "",
- user_args ? user_args : "",
- list_pw ? list_pw->pw_name : runas_pw ?
- runas_pw->pw_name : user_name, runas_gr ? ":" : "",
- runas_gr ? runas_gr->gr_name : "", user_host);
- }
-
- /*
- * Log via syslog and/or a file.
- */
- if (def_syslog)
- do_syslog(def_syslog_badpri, logline);
- if (def_logfile)
- do_logfile(logline);
-
- efree(logline);
-}
-
-/*
- * Log and potentially mail the allowed command.
- */
-void
-log_allowed(status)
- int status;
-{
- char *logline;
-
- logline = new_logline(NULL, 0);
-
- if (should_mail(status))
- send_mail("%s", logline); /* send mail based on status */
-
- /*
- * Log via syslog and/or a file.
- */
- if (def_syslog)
- do_syslog(def_syslog_goodpri, logline);
- if (def_logfile)
- do_logfile(logline);
-
- efree(logline);
-}
-
-void
-#ifdef __STDC__
-log_error(int flags, const char *fmt, ...)
-#else
-log_error(flags, fmt, va_alist)
- int flags;
- const char *fmt;
- va_dcl
-#endif
-{
- int serrno = errno;
- char *message;
- char *logline;
- va_list ap;
-#ifdef __STDC__
- va_start(ap, fmt);
-#else
- va_start(ap);
-#endif
-
- /* Become root if we are not already to avoid user interference */
- set_perms(PERM_ROOT|PERM_NOEXIT);
-
- /* Expand printf-style format + args. */
- evasprintf(&message, fmt, ap);
- va_end(ap);
-
- if (ISSET(flags, MSG_ONLY))
- logline = message;
- else
- logline = new_logline(message, ISSET(flags, USE_ERRNO) ? serrno : 0);
-
- /*
- * Tell the user.
- */
- if (!ISSET(flags, NO_STDERR)) {
- if (ISSET(flags, USE_ERRNO))
- warning("%s", message);
- else
- warningx("%s", message);
- }
- if (logline != message)
- efree(message);
-
- /*
- * Send a copy of the error via mail.
- */
- if (!ISSET(flags, NO_MAIL))
- send_mail("%s", logline);
-
- /*
- * Log to syslog and/or a file.
- */
- if (def_syslog)
- do_syslog(def_syslog_badpri, logline);
- if (def_logfile)
- do_logfile(logline);
-
- efree(logline);
-
- if (!ISSET(flags, NO_EXIT)) {
- cleanup(0);
- exit(1);
- }
-}
-
-#define MAX_MAILFLAGS 63
-
-/*
- * Send a message to MAILTO user
- */
-static void
-#ifdef __STDC__
-send_mail(const char *fmt, ...)
-#else
-send_mail(fmt, va_alist)
- const char *fmt;
- va_dcl
-#endif
-{
- FILE *mail;
- char *p;
- int fd, pfd[2], status;
- pid_t pid, rv;
- sigaction_t sa;
- va_list ap;
-#ifndef NO_ROOT_MAILER
- static char *root_envp[] = {
- "HOME=/",
- "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
- "LOGNAME=root",
- "USERNAME=root",
- "USER=root",
- NULL
- };
-#endif
-
- /* Just return if mailer is disabled. */
- if (!def_mailerpath || !def_mailto)
- return;
-
- /* Fork and return, child will daemonize. */
- switch (pid = fork()) {
- case -1:
- /* Error. */
- error(1, "cannot fork");
- break;
- case 0:
- /* Child. */
- switch (pid = fork()) {
- case -1:
- /* Error. */
- mysyslog(LOG_ERR, "cannot fork: %m");
- _exit(1);
- case 0:
- /* Grandchild continues below. */
- break;
- default:
- /* Parent will wait for us. */
- _exit(0);
- }
- break;
- default:
- /* Parent. */
- do {
-#ifdef HAVE_WAITPID
- rv = waitpid(pid, &status, 0);
-#else
- rv = wait(&status);
-#endif
- } while (rv == -1 && errno == EINTR);
- return;
- }
-
- /* Daemonize - disassociate from session/tty. */
- if (setsid() == -1)
- warning("setsid");
- (void) chdir("/");
- if ((fd = open(_PATH_DEVNULL, O_RDWR, 0644)) != -1) {
- (void) dup2(fd, STDIN_FILENO);
- (void) dup2(fd, STDOUT_FILENO);
- (void) dup2(fd, STDERR_FILENO);
- }
-
- /* Close password, group and other fds so we don't leak. */
- sudo_endpwent();
- sudo_endgrent();
- closefrom(STDERR_FILENO + 1);
-
- /* Ignore SIGPIPE in case mailer exits prematurely (or is missing). */
- zero_bytes(&sa, sizeof(sa));
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_INTERRUPT;
- sa.sa_handler = SIG_IGN;
- (void) sigaction(SIGPIPE, &sa, NULL);
-
- if (pipe(pfd) == -1) {
- mysyslog(LOG_ERR, "cannot open pipe: %m");
- _exit(1);
- }
-
- switch (pid = fork()) {
- case -1:
- /* Error. */
- mysyslog(LOG_ERR, "cannot fork: %m");
- _exit(1);
- break;
- case 0:
- {
- char *argv[MAX_MAILFLAGS + 1];
- char *mpath, *mflags;
- int i;
-
- /* Child, set stdin to output side of the pipe */
- if (pfd[0] != STDIN_FILENO) {
- if (dup2(pfd[0], STDIN_FILENO) == -1) {
- mysyslog(LOG_ERR, "cannot dup stdin: %m");
- _exit(127);
- }
- (void) close(pfd[0]);
- }
- (void) close(pfd[1]);
-
- /* Build up an argv based on the mailer path and flags */
- mflags = estrdup(def_mailerflags);
- mpath = estrdup(def_mailerpath);
- if ((argv[0] = strrchr(mpath, ' ')))
- argv[0]++;
- else
- argv[0] = mpath;
-
- i = 1;
- if ((p = strtok(mflags, " \t"))) {
- do {
- argv[i] = p;
- } while (++i < MAX_MAILFLAGS && (p = strtok(NULL, " \t")));
- }
- argv[i] = NULL;
-
- /*
- * Depending on the config, either run the mailer as root
- * (so user cannot kill it) or as the user (for the paranoid).
- */
-#ifndef NO_ROOT_MAILER
- set_perms(PERM_ROOT|PERM_NOEXIT);
- execve(mpath, argv, root_envp);
-#else
- set_perms(PERM_FULL_USER|PERM_NOEXIT);
- execv(mpath, argv);
-#endif /* NO_ROOT_MAILER */
- mysyslog(LOG_ERR, "cannot execute %s: %m", mpath);
- _exit(127);
- }
- break;
- }
-
- (void) close(pfd[0]);
- mail = fdopen(pfd[1], "w");
-
- /* Pipes are all setup, send message. */
- (void) fprintf(mail, "To: %s\nFrom: %s\nAuto-Submitted: %s\nSubject: ",
- def_mailto, def_mailfrom ? def_mailfrom : user_name, "auto-generated");
- for (p = def_mailsub; *p; p++) {
- /* Expand escapes in the subject */
- if (*p == '%' && *(p+1) != '%') {
- switch (*(++p)) {
- case 'h':
- (void) fputs(user_host, mail);
- break;
- case 'u':
- (void) fputs(user_name, mail);
- break;
- default:
- p--;
- break;
- }
- } else
- (void) fputc(*p, mail);
- }
-
- (void) fprintf(mail, "\n\n%s : %s : %s : ", user_host,
- get_timestr(time(NULL), def_log_year), user_name);
-#ifdef __STDC__
- va_start(ap, fmt);
-#else
- va_start(ap);
-#endif
- (void) vfprintf(mail, fmt, ap);
- va_end(ap);
- fputs("\n\n", mail);
-
- fclose(mail);
- do {
-#ifdef HAVE_WAITPID
- rv = waitpid(pid, &status, 0);
-#else
- rv = wait(&status);
-#endif
- } while (rv == -1 && errno == EINTR);
- _exit(0);
-}
-
-/*
- * Determine whether we should send mail based on "status" and defaults options.
- */
-static int
-should_mail(status)
- int status;
-{
-
- return(def_mail_always || ISSET(status, VALIDATE_ERROR) ||
- (def_mail_no_user && ISSET(status, FLAG_NO_USER)) ||
- (def_mail_no_host && ISSET(status, FLAG_NO_HOST)) ||
- (def_mail_no_perms && !ISSET(status, VALIDATE_OK)));
-}
-
-#define LL_TTY_STR "TTY="
-#define LL_CWD_STR "PWD=" /* XXX - should be CWD= */
-#define LL_USER_STR "USER="
-#define LL_GROUP_STR "GROUP="
-#define LL_ENV_STR "ENV="
-#define LL_CMND_STR "COMMAND="
-#define LL_TSID_STR "TSID="
-
-/*
- * Allocate and fill in a new logline.
- */
-static char *
-new_logline(message, serrno)
- const char *message;
- int serrno;
-{
- size_t len = 0;
- char *evstr = NULL;
- char *errstr = NULL;
- char *line;
-
- /*
- * Compute line length
- */
- if (message != NULL)
- len += strlen(message) + 3;
- if (serrno) {
- errstr = strerror(serrno);
- len += strlen(errstr) + 3;
- }
- len += sizeof(LL_TTY_STR) + 2 + strlen(user_tty);
- len += sizeof(LL_CWD_STR) + 2 + strlen(user_cwd);
- if (runas_pw != NULL)
- len += sizeof(LL_USER_STR) + 2 + strlen(runas_pw->pw_name);
- if (runas_gr != NULL)
- len += sizeof(LL_GROUP_STR) + 2 + strlen(runas_gr->gr_name);
- if (sudo_user.sessid[0] != '\0')
- len += sizeof(LL_TSID_STR) + 2 + strlen(sudo_user.sessid);
- if (sudo_user.env_vars != NULL) {
- size_t evlen = 0;
- struct list_member *cur;
- for (cur = sudo_user.env_vars; cur != NULL; cur = cur->next)
- evlen += strlen(cur->value) + 1;
- evstr = emalloc(evlen);
- evstr[0] = '\0';
- for (cur = sudo_user.env_vars; cur != NULL; cur = cur->next) {
- strlcat(evstr, cur->value, evlen);
- strlcat(evstr, " ", evlen); /* NOTE: last one will fail */
- }
- len += sizeof(LL_ENV_STR) + 2 + evlen;
- }
- len += sizeof(LL_CMND_STR) - 1 + strlen(user_cmnd);
- if (user_args != NULL)
- len += strlen(user_args) + 1;
-
- /*
- * Allocate and build up the line.
- */
- line = emalloc(++len);
- line[0] = '\0';
-
- if (message != NULL) {
- if (strlcat(line, message, len) >= len ||
- strlcat(line, errstr ? " : " : " ; ", len) >= len)
- goto toobig;
- }
- if (serrno) {
- if (strlcat(line, errstr, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- }
- if (strlcat(line, LL_TTY_STR, len) >= len ||
- strlcat(line, user_tty, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- if (strlcat(line, LL_CWD_STR, len) >= len ||
- strlcat(line, user_cwd, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- if (runas_pw != NULL) {
- if (strlcat(line, LL_USER_STR, len) >= len ||
- strlcat(line, runas_pw->pw_name, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- }
- if (runas_gr != NULL) {
- if (strlcat(line, LL_GROUP_STR, len) >= len ||
- strlcat(line, runas_gr->gr_name, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- }
- if (sudo_user.sessid[0] != '\0') {
- if (strlcat(line, LL_TSID_STR, len) >= len ||
- strlcat(line, sudo_user.sessid, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- }
- if (evstr != NULL) {
- if (strlcat(line, LL_ENV_STR, len) >= len ||
- strlcat(line, evstr, len) >= len ||
- strlcat(line, " ; ", len) >= len)
- goto toobig;
- efree(evstr);
- }
- if (strlcat(line, LL_CMND_STR, len) >= len ||
- strlcat(line, user_cmnd, len) >= len)
- goto toobig;
- if (user_args != NULL) {
- if (strlcat(line, " ", len) >= len ||
- strlcat(line, user_args, len) >= len)
- goto toobig;
- }
-
- return (line);
-toobig:
- errorx(1, "internal error: insufficient space for log line");
-}
projects / debian / sudo / blobdiff