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Make P2K_WIZARDUID require a valid integer instead of defaulting to root.

This commit is contained in:
pooka 2011-01-07 16:02:32 +00:00
parent 0d0a5842f8
commit 357983cc1c
2 changed files with 14 additions and 9 deletions
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6
lib/libp2k/p2k.3
View File

@ -1,4 +1,4 @@
.\" $NetBSD: p2k.3,v 1.9 2011/01/07 15:50:40 pooka Exp $
.\" $NetBSD: p2k.3,v 1.10 2011/01/07 16:02:32 pooka Exp $
.\"
.\" Copyright (c) 2008 Antti Kantee. All rights reserved.
.\"
@ -118,10 +118,8 @@ Do not use the puffs page or name cache.
If set, use the value of the variable to determine the UID of the
caller of each operation instead of the actual caller supplied by
.Xr puffs 3 .
This can be used for example to simplify modifying an OS installations
This can be used for example to simplify modifying an OS installation's
root image as a non-root user.
If the variable is set but does not contain an integer value, 0
(root) is used.
.El
.Sh SEE ALSO
.Xr puffs 3 ,

17
lib/libp2k/p2k.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: p2k.c,v 1.53 2011/01/07 15:47:14 pooka Exp $ */
/* $NetBSD: p2k.c,v 1.54 2011/01/07 16:02:32 pooka Exp $ */
/*
* Copyright (c) 2007, 2008, 2009 Antti Kantee. All Rights Reserved.
@ -344,10 +344,17 @@ p2k_init(uint32_t puffs_flags)
puffs_flags |= PUFFS_KFLAG_NOCACHE;
}
if ((envbuf = getenv("P2K_WIZARDUID")) != NULL) {
/* default to 0 in error cases */
wizarduid = atoi(envbuf);
haswizard = 1;
printf("P2K WIZARD MODE: using uid %d\n", wizarduid);
char *ep;
wizarduid = strtoul(envbuf, &ep, 10);
if (envbuf[0] == '\0' || *ep != '\0') {
printf("P2K_WIZARDUID: invalid uid %s\n", envbuf);
} else if (wizarduid > UID_MAX) {
printf("P2K_WIZARDUID: uid %s out-of-range\n", envbuf);
} else {
haswizard = 1;
printf("P2K WIZARD MODE: using uid %d\n", wizarduid);
}
}
p2m = allocp2m();