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Set errno to ELOOP in alias_find() if there is a cycle.

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Set errno to ENOENT in alias_find() and alias_remove() if the
entry could not be found.
This commit is contained in:
Todd C. Miller
2011-05-25 12:54:15 -04:00
parent 682333ae2d
commit 2b98492871
1 changed files with 17 additions and 10 deletions
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27
plugins/sudoers/alias.c
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@@ -44,6 +44,7 @@
#include "parse.h"
#include "redblack.h"
#include <gram.h>
#include <errno.h>
/*
* Globals
@@ -85,15 +86,19 @@ alias_find(char *name, int type)
key.name = name;
key.type = type;
if ((node = rbfind(aliases, &key)) != NULL) {
/*
* Compare the global sequence number with the one stored
* in the alias. If they match then we've seen this alias
* before and found a loop.
*/
a = node->data;
if (a->seqno == alias_seqno)
return NULL;
a->seqno = alias_seqno;
/*
* Compare the global sequence number with the one stored
* in the alias. If they match then we've seen this alias
* before and found a loop.
*/
a = node->data;
if (a->seqno == alias_seqno) {
errno = ELOOP;
return NULL;
}
a->seqno = alias_seqno;
} else {
errno = ENOENT;
}
return a;
}
@@ -175,8 +180,10 @@ alias_remove(char *name, int type)
key.name = name;
key.type = type;
if ((node = rbfind(aliases, &key)) == NULL)
if ((node = rbfind(aliases, &key)) == NULL) {
errno = ENOENT;
return NULL;
}
return rbdelete(aliases, node);
}