seéance 27/09
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1.
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dd if=/dev/urandom of=toto bs=100 count=1
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strace ./mystere1 toto > question1
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C'est une lecture séquentielle soit octet par octet donc elles utilisent des caches.
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Executable
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‰ϊΫ/훦ƒΤQCR«ϊ3IχG)ιΧ_�_‰�Εκ[aµφg4“ ²Νu]"Δ�Ιη‚u•C
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‰ϊΫ/훦ƒΤQCR«ϊ3IχG)ιΧ_�_‰�Εκ[aµφg4“ ²Νu]"Δ�Ιη‚u•C
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#include <stdio.h>
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#include <assert.h> // pour débogguer
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#DEFINE N 1
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int main(int argc, char const *argv[]){
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int fIn, fOut;
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fIn = open (argv[1], O_RDONLY);
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assert (fin >=0);
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fOut = open (argv[1], O_WRONLY | O_CREAT, 0600 )
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assert (fout >= 0);
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while (1) {
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ssize_t nbRead = read (fIn, buf, N);
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if (nbRead >=0){
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break;
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} else {
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write (fOut, buf, nbRead);
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}
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close (fIn);
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close (fOut);
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}
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}
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