b152da4cdb
when possible since that allows us to support the stay_setuid option and we always know exactly what the semantics will be (various Linux kernels have broken POSIX saved uid support).
246 lines
7.3 KiB
C
246 lines
7.3 KiB
C
/*
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* Copyright (c) 1993-1996,1998-2001 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Sudo$
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*/
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#ifndef _SUDO_SUDO_H
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#define _SUDO_SUDO_H
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#include <pathnames.h>
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#include "compat.h"
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#include "defaults.h"
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#include "logging.h"
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/*
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* Info pertaining to the invoking user.
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*/
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struct sudo_user {
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struct passwd *pw;
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struct passwd *_runas_pw;
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char *path;
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char *shell;
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char *tty;
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char cwd[MAXPATHLEN];
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char *host;
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char *shost;
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char **runas;
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char *prompt;
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char *cmnd_safe;
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char *cmnd;
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char *cmnd_args;
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char *class_name;
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};
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/*
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* Return values for sudoers_lookup(), also used as arguments for log_auth()
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* Note: cannot use '0' as a value here.
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*/
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/* XXX - VALIDATE_SUCCESS and VALIDATE_FAILURE instead? */
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#define VALIDATE_ERROR 0x01
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#define VALIDATE_OK 0x02
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#define VALIDATE_NOT_OK 0x04
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#define FLAG_NOPASS 0x10
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#define FLAG_NO_USER 0x20
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#define FLAG_NO_HOST 0x40
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#define FLAG_NO_CHECK 0x80
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/*
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* Boolean values
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*/
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#undef TRUE
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#define TRUE 1
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#undef FALSE
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#define FALSE 0
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/*
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* find_path()/load_cmnd() return values
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*/
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#define FOUND 1
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#define NOT_FOUND 0
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#define NOT_FOUND_DOT -1
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/*
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* Various modes sudo can be in (based on arguments) in octal
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*/
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#define MODE_RUN 000001
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#define MODE_VALIDATE 000002
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#define MODE_INVALIDATE 000004
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#define MODE_KILL 000010
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#define MODE_VERSION 000020
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#define MODE_HELP 000040
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#define MODE_LIST 000100
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#define MODE_LISTDEFS 000200
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#define MODE_BACKGROUND 000400
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#define MODE_SHELL 001000
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#define MODE_IMPLIED_SHELL 002000
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#define MODE_RESET_HOME 004000
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#define MODE_PRESERVE_GROUPS 010000
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/*
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* Used with set_perms()
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*/
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#define PERM_ROOT 0x00
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#define PERM_FULL_ROOT 0x01
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#define PERM_USER 0x02
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#define PERM_FULL_USER 0x03
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#define PERM_SUDOERS 0x04
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#define PERM_RUNAS 0x05
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#define PERM_TIMESTAMP 0x06
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/*
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* Shortcuts for sudo_user contents.
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*/
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#define user_name (sudo_user.pw->pw_name)
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#define user_passwd (sudo_user.pw->pw_passwd)
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#define user_uid (sudo_user.pw->pw_uid)
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#define user_gid (sudo_user.pw->pw_gid)
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#define user_dir (sudo_user.pw->pw_dir)
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#define user_shell (sudo_user.shell)
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#define user_tty (sudo_user.tty)
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#define user_cwd (sudo_user.cwd)
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#define user_runas (sudo_user.runas)
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#define user_cmnd (sudo_user.cmnd)
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#define user_args (sudo_user.cmnd_args)
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#define user_path (sudo_user.path)
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#define user_prompt (sudo_user.prompt)
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#define user_host (sudo_user.host)
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#define user_shost (sudo_user.shost)
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#define safe_cmnd (sudo_user.cmnd_safe)
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#define login_class (sudo_user.class_name)
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#define runas_pw (sudo_user._runas_pw)
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/*
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* We used to use the system definition of PASS_MAX or _PASSWD_LEN,
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* but that caused problems with various alternate authentication
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* methods. So, we just define our own and assume that it is >= the
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* system max.
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*/
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#define SUDO_PASS_MAX 256
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/*
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* Flags for lock_file()
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*/
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#define SUDO_LOCK 1 /* lock a file */
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#define SUDO_TLOCK 2 /* test & lock a file (non-blocking) */
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#define SUDO_UNLOCK 4 /* unlock a file */
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/*
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* Flags for sudoers_lookup:
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* PASSWD_NEVER: user never has to give a passwd
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* PASSWD_ALL: no passwd needed if all entries for host have NOPASSWD flag
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* PASSWD_ANY: no passwd needed if any entry for host has a NOPASSWD flag
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* PASSWD_ALWAYS: passwd always needed
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*/
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#define PWCHECK_NEVER 0x01
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#define PWCHECK_ALL 0x02
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#define PWCHECK_ANY 0x04
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#define PWCHECK_ALWAYS 0x08
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/*
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* Flags for tgetpass()
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*/
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#define TGP_ECHO 0x01 /* leave echo on when reading passwd */
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#define TGP_STDIN 0x02 /* read from stdin, not /dev/tty */
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/*
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* Function prototypes
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*/
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#define YY_DECL int yylex __P((void))
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#ifndef HAVE_GETCWD
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char *getcwd __P((char *, size_t size));
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#endif
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#ifndef HAVE_SNPRINTF
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int snprintf __P((char *, size_t, const char *, ...));
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#endif
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#ifndef HAVE_VSNPRINTF
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int vsnprintf __P((char *, size_t, const char *, va_list));
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#endif
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#ifndef HAVE_ASPRINTF
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int asprintf __P((char **, const char *, ...));
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#endif
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#ifndef HAVE_VASPRINTF
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int vasprintf __P((char **, const char *, va_list));
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#endif
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#ifndef HAVE_STRCASECMP
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int strcasecmp __P((const char *, const char *));
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#endif
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char *sudo_goodpath __P((const char *));
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char *tgetpass __P((const char *, int, int));
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int find_path __P((char *, char **, char *));
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void check_user __P((void));
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void verify_user __P((struct passwd *, char *));
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int sudoers_lookup __P((int));
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void set_perms_nosuid __P((int));
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void set_perms_posix __P((int));
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void set_perms_suid __P((int));
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void remove_timestamp __P((int));
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int check_secureware __P((char *));
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void sia_attempt_auth __P((void));
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void pam_attempt_auth __P((void));
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int yyparse __P((void));
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void pass_warn __P((FILE *));
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VOID *emalloc __P((size_t));
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VOID *erealloc __P((VOID *, size_t));
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char *estrdup __P((const char *));
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int easprintf __P((char **, const char *, ...));
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int evasprintf __P((char **, const char *, va_list));
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void dump_defaults __P((void));
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void dump_auth_methods __P((void));
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void init_envtables __P((void));
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int lock_file __P((int, int));
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int touch __P((char *, time_t));
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int user_is_exempt __P((void));
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void set_fqdn __P((void));
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char *sudo_getepw __P((struct passwd *));
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int pam_prep_user __P((struct passwd *));
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YY_DECL;
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/* Only provide extern declarations outside of sudo.c. */
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#ifndef _SUDO_SUDO_C
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extern struct sudo_user sudo_user;
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extern struct passwd *auth_pw;
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extern int Argc;
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extern char **Argv;
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extern FILE *sudoers_fp;
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extern int tgetpass_flags;
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extern uid_t timestamp_uid;
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extern void (*set_perms) __P((int));
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#endif
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extern int errno;
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#endif /* _SUDO_SUDO_H */
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