StrNCpy
От | Maurice Gittens |
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Тема | StrNCpy |
Дата | |
Msg-id | 006201bd5c85$145d3360$fcf3b2c2@caleb..gits.nl обсуждение исходный текст |
Ответы |
Re: [HACKERS] StrNCpy
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Список | pgsql-hackers |
Hi, While debugging yet another overrun I came across the StrNCpy macro. A quick grep of the source tells me that usage of the StrNCpy macro is seemingly inconsistent. Usage 1: strptr = palloc(len); // done is a diffrent context ptr = palloc(len + 1); StrNCpy(ptr, strptr, len + 1); Usage 2: NameData name; StrNCpy(name.data, ptr2name, NAMEDATALEN); The StrNCpy macro zero terminates the destination buffer. Usage 1 is gives a read=buffer overrun (which I agree is not the most serious of bugs if you system doesn't dump core on it). Usage 2 makes gives the name a maximum of 31 instead of 32 characters. Is the maximun name length supposted to be 31 or 32 characters? With regards from Maurice.
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