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Dummy out close function if there is no end_session for the auth

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method and the front-end can handle a NULL close function.  Avoids
the extra sudo process when we don't actually need it.
This commit is contained in:
Todd C. Miller
2013-02-24 05:54:57 -05:00
parent 2b8cb98987
commit d3ff0f31ee
3 changed files with 31 additions and 4 deletions
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18
plugins/sudoers/auth/sudo_auth.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1999-2005, 2008-2010 Todd C. Miller <Todd.Miller@courtesan.com>
* Copyright (c) 1999-2005, 2008-2013 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
@@ -302,6 +302,22 @@ sudo_auth_begin_session(struct passwd *pw, char **user_env[])
debug_return_int(status == AUTH_FATAL ? -1 : 1);
}
bool
sudo_auth_needs_end_session(void)
{
sudo_auth *auth;
bool needed = false;
debug_decl(sudo_auth_needs_end_session, SUDO_DEBUG_AUTH)
for (auth = auth_switch; auth->name; auth++) {
if (auth->end_session && !IS_DISABLED(auth)) {
needed = true;
break;
}
}
debug_return_bool(needed);
}
/*
* Call authentication method end session hooks.
* Returns 1 on success and -1 on error.

14
plugins/sudoers/policy.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2010-2012 Todd C. Miller <Todd.Miller@courtesan.com>
* Copyright (c) 2010-2013 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
@@ -68,6 +68,8 @@ struct sudoers_exec_args {
static int sudo_version;
static const char *interfaces_string;
extern __dso_public struct policy_plugin sudoers_policy;
#ifdef HAVE_BSD_AUTH_H
extern char *login_style;
#endif /* HAVE_BSD_AUTH_H */
@@ -561,6 +563,7 @@ sudoers_policy_check(int argc, char * const argv[], char *env_add[],
char **command_infop[], char **argv_out[], char **user_env_out[])
{
struct sudoers_exec_args exec_args;
int rval;
debug_decl(sudoers_policy_check, SUDO_DEBUG_PLUGIN)
if (!ISSET(sudo_mode, MODE_EDIT))
@@ -570,7 +573,14 @@ sudoers_policy_check(int argc, char * const argv[], char *env_add[],
exec_args.envp = user_env_out;
exec_args.info = command_infop;
debug_return_bool(sudoers_policy_main(argc, argv, 0, env_add, &exec_args));
rval = sudoers_policy_main(argc, argv, 0, env_add, &exec_args);
if (rval == true && sudo_version >= SUDO_API_MKVERSION(1, 3)) {
/* Unset close function if we don't need it to avoid extra process. */
if (!def_log_input && !def_log_output && !def_use_pty &&
!sudo_auth_needs_end_session())
sudoers_policy.close = NULL;
}
debug_return_bool(rval);
}
static int

3
plugins/sudoers/sudoers.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1993-1996, 1998-2005, 2007-2012
* Copyright (c) 1993-1996, 1998-2005, 2007-2013
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
@@ -242,6 +242,7 @@ void remove_timestamp(bool);
bool set_lectured(void);
/* sudo_auth.c */
bool sudo_auth_needs_end_session(void);
int verify_user(struct passwd *pw, char *prompt, int validated);
int sudo_auth_begin_session(struct passwd *pw, char **user_env[]);
int sudo_auth_end_session(struct passwd *pw);