Xref: utzoo comp.unix.questions:13149 comp.unix.wizards:15835
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!biar!trebor
From: trebor@biar.UUCP (Robert J Woodhead)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: system() --- the C function from hell?
Keywords: system, unix, question, does anyone use this line?
Message-ID: <515@biar.UUCP>
Date: 30 Apr 89 19:55:46 GMT
References: <1827@uop.edu>
Reply-To: trebor@biar.UUCP (Robert J Woodhead)
Followup-To: comp.unix.questions
Organization: Biar Games, Inc.
Lines: 18

In article <1827@uop.edu> jeff@uop.edu (Jeff Ferguson) writes:
>int lowp, hip;
>scanf("%d", &hip);
>scanf("%d", &lowp);
>sprintf(str, "/bin/mkdir directory");
>system(str);

I note that you haven't given us the definition of ``str''.  I would
like to see this definition,  for if str was not long enough to hold
"/bin/mkdir directory" plus the termination byte, and was defined so
the compiler put it in memory right before lowp and hip, it would be
possible for the sprintf to trash the integers.

-- 
Robert J Woodhead, Biar Games, Inc.  ...!uunet!biar!trebor | trebor@biar.UUCP
"The NY Times is read by the people who run the country.  The Washington Post
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