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sudo/sudo.h
Todd C. Miller dcf6602daa Use a socketpair to pass signals from parent to child. Child will 
now pass command status change info back via the socketpair.  This
allows the parent to distinguish between signals it has been sent
directly and signals the command has received.  It also means the
parent can once again print the signal notifications to the tty so
all writes to the pty master occur in the parent.  The command is
now always started in background mode with tty signals handled
by the parent.
2009-11-15 21:42:17 +00:00

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9.2 KiB
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/*
* Copyright (c) 1993-1996, 1998-2005, 2007-2009
* 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.
*
* $Sudo$
*/
#ifndef _SUDO_SUDO_H
#define _SUDO_SUDO_H
#include <pathnames.h>
#include <limits.h>
#include "compat.h"
#include "alloc.h"
#include "defaults.h"
#include "error.h"
#include "list.h"
#include "logging.h"
#include "missing.h"
#include "sudo_nss.h"
/*
* Info pertaining to the invoking user.
*/
struct sudo_user {
struct passwd *pw;
struct passwd *_runas_pw;
struct group *_runas_gr;
struct stat *cmnd_stat;
char *path;
char *shell;
char *tty;
char *ttypath;
char *host;
char *shost;
char *prompt;
char *cmnd;
char *cmnd_args;
char *cmnd_base;
char *cmnd_safe;
char *class_name;
char *krb5_ccname;
char *display;
char *askpass;
int ngroups;
GETGROUPS_T *groups;
struct list_member *env_vars;
#ifdef HAVE_SELINUX
char *role;
char *type;
#endif
char cwd[PATH_MAX];
char sessid[7];
};
/*
* Return values for sudoers_lookup(), also used as arguments for log_auth()
* Note: cannot use '0' as a value here.
*/
/* XXX - VALIDATE_SUCCESS and VALIDATE_FAILURE instead? */
#define VALIDATE_ERROR 0x001
#define VALIDATE_OK 0x002
#define VALIDATE_NOT_OK 0x004
#define FLAG_CHECK_USER 0x010
#define FLAG_NO_USER 0x020
#define FLAG_NO_HOST 0x040
#define FLAG_NO_CHECK 0x080
/*
* Pseudo-boolean values
*/
#undef TRUE
#define TRUE 1
#undef FALSE
#define FALSE 0
/*
* find_path()/load_cmnd() return values
*/
#define FOUND 1
#define NOT_FOUND 0
#define NOT_FOUND_DOT -1
/*
* Various modes sudo can be in (based on arguments) in hex
*/
#define MODE_RUN 0x00000001
#define MODE_EDIT 0x00000002
#define MODE_VALIDATE 0x00000004
#define MODE_INVALIDATE 0x00000008
#define MODE_KILL 0x00000010
#define MODE_VERSION 0x00000020
#define MODE_HELP 0x00000040
#define MODE_LIST 0x00000080
#define MODE_CHECK 0x00000100
#define MODE_LISTDEFS 0x00000200
#define MODE_MASK 0x0000ffff
/* Mode flags */
#define MODE_BACKGROUND 0x00010000
#define MODE_SHELL 0x00020000
#define MODE_LOGIN_SHELL 0x00040000
#define MODE_IMPLIED_SHELL 0x00080000
#define MODE_RESET_HOME 0x00100000
#define MODE_PRESERVE_GROUPS 0x00200000
#define MODE_PRESERVE_ENV 0x00400000
#define MODE_NONINTERACTIVE 0x00800000
/*
* Used with set_perms()
*/
#define PERM_ROOT 0x00
#define PERM_USER 0x01
#define PERM_FULL_USER 0x02
#define PERM_SUDOERS 0x03
#define PERM_RUNAS 0x04
#define PERM_FULL_RUNAS 0x05
#define PERM_TIMESTAMP 0x06
#define PERM_NOEXIT 0x10 /* flag */
#define PERM_MASK 0xf0
/*
* Shortcuts for sudo_user contents.
*/
#define user_name (sudo_user.pw->pw_name)
#define user_passwd (sudo_user.pw->pw_passwd)
#define user_uid (sudo_user.pw->pw_uid)
#define user_gid (sudo_user.pw->pw_gid)
#define user_dir (sudo_user.pw->pw_dir)
#define user_shell (sudo_user.shell)
#define user_ngroups (sudo_user.ngroups)
#define user_groups (sudo_user.groups)
#define user_tty (sudo_user.tty)
#define user_ttypath (sudo_user.ttypath)
#define user_cwd (sudo_user.cwd)
#define user_cmnd (sudo_user.cmnd)
#define user_args (sudo_user.cmnd_args)
#define user_base (sudo_user.cmnd_base)
#define user_stat (sudo_user.cmnd_stat)
#define user_path (sudo_user.path)
#define user_prompt (sudo_user.prompt)
#define user_host (sudo_user.host)
#define user_shost (sudo_user.shost)
#define user_ccname (sudo_user.krb5_ccname)
#define user_display (sudo_user.display)
#define user_askpass (sudo_user.askpass)
#define safe_cmnd (sudo_user.cmnd_safe)
#define login_class (sudo_user.class_name)
#define runas_pw (sudo_user._runas_pw)
#define runas_gr (sudo_user._runas_gr)
#define user_role (sudo_user.role)
#define user_type (sudo_user.type)
/*
* We used to use the system definition of PASS_MAX or _PASSWD_LEN,
* but that caused problems with various alternate authentication
* methods. So, we just define our own and assume that it is >= the
* system max.
*/
#define SUDO_PASS_MAX 256
/*
* Flags for lock_file()
*/
#define SUDO_LOCK 1 /* lock a file */
#define SUDO_TLOCK 2 /* test & lock a file (non-blocking) */
#define SUDO_UNLOCK 4 /* unlock a file */
/*
* Flags for tgetpass()
*/
#define TGP_ECHO 0x01 /* leave echo on when reading passwd */
#define TGP_STDIN 0x02 /* read from stdin, not /dev/tty */
#define TGP_ASKPASS 0x04 /* read from askpass helper program */
struct lbuf;
struct passwd;
/*
* Function prototypes
*/
#define YY_DECL int yylex __P((void))
char *sudo_goodpath __P((const char *, struct stat *));
char *tgetpass __P((const char *, int, int));
int find_path __P((char *, char **, struct stat *, char *));
int tty_present __P((void));
void check_user __P((int, int));
void verify_user __P((struct passwd *, char *));
#ifdef HAVE_LDAP
int sudo_ldap_open __P((struct sudo_nss *));
int sudo_ldap_close __P((struct sudo_nss *));
int sudo_ldap_setdefs __P((struct sudo_nss *));
int sudo_ldap_lookup __P((struct sudo_nss *, int, int));
int sudo_ldap_parse __P((struct sudo_nss *));
int sudo_ldap_display_cmnd __P((struct sudo_nss *, struct passwd *));
int sudo_ldap_display_defaults __P((struct sudo_nss *, struct passwd *, struct lbuf *));
int sudo_ldap_display_bound_defaults __P((struct sudo_nss *, struct passwd *, struct lbuf *));
int sudo_ldap_display_privs __P((struct sudo_nss *, struct passwd *, struct lbuf *));
#endif
int sudo_file_open __P((struct sudo_nss *));
int sudo_file_close __P((struct sudo_nss *));
int sudo_file_setdefs __P((struct sudo_nss *));
int sudo_file_lookup __P((struct sudo_nss *, int, int));
int sudo_file_parse __P((struct sudo_nss *));
int sudo_file_display_cmnd __P((struct sudo_nss *, struct passwd *));
int sudo_file_display_defaults __P((struct sudo_nss *, struct passwd *, struct lbuf *));
int sudo_file_display_bound_defaults __P((struct sudo_nss *, struct passwd *, struct lbuf *));
int sudo_file_display_privs __P((struct sudo_nss *, struct passwd *, struct lbuf *));
int set_perms __P((int));
void remove_timestamp __P((int));
int check_secureware __P((char *));
void sia_attempt_auth __P((void));
void pam_attempt_auth __P((void));
int yyparse __P((void));
void pass_warn __P((FILE *));
void dump_defaults __P((void));
void dump_auth_methods __P((void));
void init_envtables __P((void));
void read_env_file __P((const char *, int));
int lock_file __P((int, int));
int touch __P((int, char *, struct timespec *));
int user_is_exempt __P((void));
void set_fqdn __P((void));
char *sudo_getepw __P((const struct passwd *));
int pam_prep_user __P((struct passwd *));
void zero_bytes __P((volatile void *, size_t));
int gettime __P((struct timespec *));
FILE *open_sudoers __P((const char *, int, int *));
void display_privs __P((struct sudo_nss_list *, struct passwd *));
int display_cmnd __P((struct sudo_nss_list *, struct passwd *));
int get_ttycols __P((void));
char *sudo_parseln __P((FILE *));
void sudo_setgrent __P((void));
void sudo_endgrent __P((void));
void sudo_setpwent __P((void));
void sudo_endpwent __P((void));
void sudo_setspent __P((void));
void sudo_endspent __P((void));
void cleanup __P((int));
struct passwd *sudo_getpwnam __P((const char *));
struct passwd *sudo_fakepwnam __P((const char *, gid_t));
struct passwd *sudo_getpwuid __P((uid_t));
struct group *sudo_getgrnam __P((const char *));
struct group *sudo_fakegrnam __P((const char *));
struct group *sudo_getgrgid __P((gid_t));
#ifdef HAVE_SELINUX
void selinux_exec __P((char *, char *, char **));
void selinux_execv __P((char *, char **));
void selinux_prefork __P((char *, char *, int));
#endif
#ifdef HAVE_GETUSERATTR
void aix_setlimits __P((char *));
#endif
int script_duplow __P((int));
int script_execv __P((char *, char **));
void script_nextid __P((void));
void script_setup __P((void));
int term_cbreak __P((int));
int term_copy __P((int, int, int));
int term_noecho __P((int));
int term_raw __P((int, int, int));
int term_restore __P((int, int));
char *get_timestr __P((time_t, int));
YY_DECL;
/* Only provide extern declarations outside of sudo.c. */
#ifndef _SUDO_MAIN
extern struct sudo_user sudo_user;
extern struct passwd *auth_pw, *list_pw;
extern int tgetpass_flags;
extern int long_list;
extern uid_t timestamp_uid;
#endif
#ifndef errno
extern int errno;
#endif
#endif /* _SUDO_SUDO_H */
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