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char array

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# 8  
Old 10-22-2012
Wrench
Hi Expl and JohnGraham

i
Code:
nt main() {
unsigned char wwn[8]="\x50\x00\x53\x30\x8\x9\x82\x17";
    unsigned char wwn1[8]="\x50\x00\x53\x30\x08\x09\x82\x21";
    print_wwn(wwn);
    print_wwn(wwn1);
  strcpy(wwn1,"\x50\x00\x53\x30\x08\x09\x82\x32");
    print_wwn(wwn1);
return;
}

Code:
int print_wwn(unsigned char wwn[8]) {
printf("WWN: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n ",
            wwn[0],
            wwn[1],
            wwn[2],
            wwn[3],
            wwn[4],
            wwn[5],
            wwn[6],
            wwn[7]);
return 0;
}

output:
Code:
{250}: cc key.c
{251}: ./a.out
WWN: 50:00:53:30:08:09:82:17
 WWN: 50:00:53:30:08:09:82:21
 WWN: 50:00:53:30:08:09:82:21
{252}:

Question:
Why the string copy does not working??
Last edited by Corona688; 10-22-2012 at 12:14 PM..
# 9  
Old 10-22-2012
Code:
strcpy(wwn1,"\x50\x00\x53\x30\x08\x09\x82\x32");

strcpy() will copy until 0 terminated char is reached and you have 0 char in second position so it will copy only first byte and leave the rest the same.

For binary copy you should use memmove():
Code:
memmove(wwn1, "\x50\x00\x53\x30\x08\x09\x82\x32", sizeof(wwn1));

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