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- (bal) Whitespace resync w/ OpenBSD for uidswap.c

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This commit is contained in:
Ben Lindstrom 2001-04-25 06:27:11 +00:00
parent 3035860f24
commit 768f975b13
2 changed files with 35 additions and 34 deletions
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3
ChangeLog
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@ -6,6 +6,7 @@
- markus@cvs.openbsd.org 2001/04/23 22:14:13
[ssh-keygen.c]
remove debug
- (bal) Whitespace resync w/ OpenBSD for uidswap.c
20010424
- OpenBSD CVS Sync
@ -5245,4 +5246,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1167 2001/04/24 16:59:28 mouring Exp $
$Id: ChangeLog,v 1.1168 2001/04/25 06:27:59 mouring Exp $

66
uidswap.c
View File

@ -28,7 +28,7 @@ RCSID("$OpenBSD: uidswap.c,v 1.16 2001/04/20 16:32:22 markus Exp $");
/* Lets assume that posix saved ids also work with seteuid, even though that
is not part of the posix specification. */
/* Saved effective uid. */
static int privileged = 0;
static int temporarily_use_uid_effective = 0;
@ -36,7 +36,7 @@ static uid_t saved_euid = 0;
static gid_t saved_egid;
static gid_t saved_egroups[NGROUPS_MAX], user_groups[NGROUPS_MAX];
static int saved_egroupslen = -1, user_groupslen = -1;
/*
* Temporarily changes to the given uid. If the effective user
* id is not root, this does nothing. This call cannot be nested.
@ -44,42 +44,42 @@ static int saved_egroupslen = -1, user_groupslen = -1;
void
temporarily_use_uid(struct passwd *pw)
{
/* Save the current euid, and egroups. */
saved_euid = geteuid();
debug("temporarily_use_uid: %d/%d (e=%d)",
pw->pw_uid, pw->pw_gid, saved_euid);
if (saved_euid != 0) {
privileged = 0;
return;
}
privileged = 1;
temporarily_use_uid_effective = 1;
saved_egid = getegid();
saved_egroupslen = getgroups(NGROUPS_MAX, saved_egroups);
if (saved_egroupslen < 0)
fatal("getgroups: %.100s", strerror(errno));
/* set and save the user's groups */
if (user_groupslen == -1) {
if (initgroups(pw->pw_name, pw->pw_gid) < 0)
fatal("initgroups: %s: %.100s", pw->pw_name,
strerror(errno));
user_groupslen = getgroups(NGROUPS_MAX, user_groups);
if (user_groupslen < 0)
fatal("getgroups: %.100s", strerror(errno));
}
/* Set the effective uid to the given (unprivileged) uid. */
/* Save the current euid, and egroups. */
saved_euid = geteuid();
debug("temporarily_use_uid: %d/%d (e=%d)",
pw->pw_uid, pw->pw_gid, saved_euid);
if (saved_euid != 0) {
privileged = 0;
return;
}
privileged = 1;
temporarily_use_uid_effective = 1;
saved_egid = getegid();
saved_egroupslen = getgroups(NGROUPS_MAX, saved_egroups);
if (saved_egroupslen < 0)
fatal("getgroups: %.100s", strerror(errno));
/* set and save the user's groups */
if (user_groupslen == -1) {
if (initgroups(pw->pw_name, pw->pw_gid) < 0)
fatal("initgroups: %s: %.100s", pw->pw_name,
strerror(errno));
user_groupslen = getgroups(NGROUPS_MAX, user_groups);
if (user_groupslen < 0)
fatal("getgroups: %.100s", strerror(errno));
}
/* Set the effective uid to the given (unprivileged) uid. */
if (setgroups(user_groupslen, user_groups) < 0)
fatal("setgroups: %.100s", strerror(errno));
pw->pw_gid = pw->pw_gid;
if (setegid(pw->pw_gid) < 0)
fatal("setegid %u: %.100s", (u_int) pw->pw_gid,
strerror(errno));
if (seteuid(pw->pw_uid) == -1)
fatal("seteuid %u: %.100s", (u_int) pw->pw_uid,
strerror(errno));
fatal("setegid %u: %.100s", (u_int) pw->pw_gid,
strerror(errno));
if (seteuid(pw->pw_uid) == -1)
fatal("seteuid %u: %.100s", (u_int) pw->pw_uid,
strerror(errno));
}
/*
* Restores to the original (privileged) uid.
*/