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* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Fail in case of

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invalid configuration. 
	* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Updated
	comments.
	* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Be more strict
	on the loop stop conditions. Stop if we passed the limit, even if
	the limit itself was never noticed.
This commit is contained in:
nekral-guest
2011-07-22 21:53:01 +00:00
parent a210d898b6
commit 275ffe2e01
3 changed files with 33 additions and 17 deletions
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19
libmisc/find_new_uid.c
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@@ -1,6 +1,6 @@
/*
* Copyright (c) 1991 - 1994, Julianne Frances Haugh
* Copyright (c) 2008 - 2009, Nicolas François
* Copyright (c) 2008 - 2011, Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -65,6 +65,7 @@ int find_new_uid (bool sys_user,
(void) fprintf (stderr,
_("%s: Invalid configuration: UID_MIN (%lu), UID_MAX (%lu)\n"),
Prog, (unsigned long) uid_min, (unsigned long) uid_max);
return -1;
}
} else {
uid_min = (uid_t) getdef_ulong ("SYS_UID_MIN", 101UL);
@@ -74,6 +75,7 @@ int find_new_uid (bool sys_user,
(void) fprintf (stderr,
_("%s: Invalid configuration: SYS_UID_MIN (%lu), UID_MIN (%lu), SYS_UID_MAX (%lu)\n"),
Prog, (unsigned long) uid_min, getdef_ulong ("UID_MIN", 1000UL), (unsigned long) uid_max);
return -1;
}
}
used_uids = malloc (sizeof (bool) * (uid_max +1));
@@ -159,12 +161,13 @@ int find_new_uid (bool sys_user,
}
/*
* If a user with UID equal to UID_MAX exists, the above algorithm
* will give us UID_MAX+1 even if not unique. Search for the first
* free UID starting with UID_MIN.
* If a user (resp. system user) with UID equal to UID_MAX (resp.
* UID_MIN) exists, the above algorithm will give us UID_MAX+1
* (resp. UID_MIN-1) even if not unique. Search for the first free
* UID starting with UID_MIN (resp. UID_MAX).
*/
if (sys_user) {
if (user_id == uid_min - 1) {
if (user_id < uid_min) {
for (user_id = uid_max; user_id >= uid_min; user_id--) {
if (false == used_uids[user_id]) {
break;
@@ -180,13 +183,13 @@ int find_new_uid (bool sys_user,
}
}
} else {
if (user_id == uid_max + 1) {
for (user_id = uid_min; user_id < uid_max; user_id++) {
if (user_id > uid_max) {
for (user_id = uid_min; user_id <= uid_max; user_id++) {
if (false == used_uids[user_id]) {
break;
}
}
if (user_id == uid_max) {
if (user_id > uid_max) {
fprintf (stderr,
_("%s: Can't get unique UID (no more available UIDs)\n"),
Prog);