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slist: fix possible segfaults #32

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merged 1 commit into from
Feb 16, 2017
Merged

slist: fix possible segfaults #32

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19 changes: 13 additions & 6 deletions src/list.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/*
LibCGI - A library to make CGI programs using C
Copyright (C) 2001 Rafael Steil
Copyright 2016 Alexander Dahl <[email protected]>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
Expand Down Expand Up @@ -102,14 +103,20 @@ int slist_delete(char *name, formvars **start, formvars **last)
// Returns the value of the item pointed by name
char *slist_item(const char *name, formvars *start)
{
formvars *begin;
begin = start;
formvars *curr = start;

while (begin) {
if (!strcasecmp(begin->name, name))
return (!begin->value[0] ? NULL : begin->value);
if ( !name ) return NULL;

begin = begin->next;
while ( curr ) {
if ( !strcasecmp( curr->name, name ) ) {
if ( curr->value == NULL || curr->value[0] == '\0' ) {
return NULL;
} else {
return curr->value;
}
}

curr = curr->next;
}

return NULL;
Expand Down