src/usr.bin/ssh/uidswap.c - diff

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Diff for /src/usr.bin/ssh/uidswap.c between version 1.3 and 1.4

version 1.3, 1999/11/23 22:25:56

version 1.4, 1999/11/24 00:26:04

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* Author: Tatu Ylonen <ylo@cs.hut.fi>

* Created: Sat Sep 9 01:56:14 1995 ylo

* Code for uid-swapping.

uidswap.c

Author: Tatu Ylonen <ylo@cs.hut.fi>

Created: Sat Sep 9 01:56:14 1995 ylo

Code for uid-swapping.

#include "includes.h"

RCSID("$Id$");

#include "ssh.h"

#include "uidswap.h"

/* Note: all these functions must work in all of the following cases:

* Note: all these functions must work in all of the following cases:

* 1. euid=0, ruid=0

* 2. euid=0, ruid!=0

* 3. euid!=0, ruid!=0

* Additionally, they must work regardless of whether the system has

* POSIX saved uids or not.

1. euid=0, ruid=0

2. euid=0, ruid!=0

3. euid!=0, ruid!=0

Additionally, they must work regardless of whether the system has

POSIX saved uids or not. */

#ifdef _POSIX_SAVED_IDS

/* Lets assume that posix saved ids also work with seteuid, even though that

is not part of the posix specification. */

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/* Saved effective uid. */

static uid_t saved_euid = 0;

/* Temporarily changes to the given uid. If the effective user id is not

root, this does nothing. This call cannot be nested. */

* Temporarily changes to the given uid. If the effective user

* id is not root, this does nothing. This call cannot be nested.

void

temporarily_use_uid(uid_t uid)

{

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#endif /* SAVED_IDS_WORK_WITH_SETEUID */

}

/* Restores to the original uid. */

* Restores to the original uid.

void

restore_uid()

{

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#endif /* SAVED_IDS_WORK_WITH_SETEUID */

}

/* Permanently sets all uids to the given uid. This cannot be called while

temporarily_use_uid is effective. */

* Permanently sets all uids to the given uid. This cannot be

* called while temporarily_use_uid is effective.

void

permanently_set_uid(uid_t uid)

{