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#include <stdio.h>
#include <fcntl.h>
void display_flags(char *, unsigned int);
void binary_print(unsigned int);
int main(int argc, const char *argv[])
{
display_flags("O_RDONLY\t\t", O_RDONLY);
display_flags("O_WRONLY\t\t", O_WRONLY);
display_flags("O_RDWR\t\t", O_RDWR);
printf("\n");
display_flags("O_APPEND\t\t", O_APPEND);
display_flags("O_TRUNC\t\t", O_TRUNC);
display_flags("O_CREAT\t\t", O_CREAT);
printf("\n");
display_flags("O_WRONLY|O_APPEND|O_CREAT", O_WRONLY|O_APPEND|O_CREAT);
return 0;
}
void display_flags(char *label, unsigned int value)
{
printf("%s\t: %d\t:", label, value);
binary_print(value);
printf("\n");
}
void binary_print(unsigned int value)
{
unsigned int mask = 0xff000000;
unsigned int shift = 256*256*256;
unsigned int byte, byte_iterator, bit_iterator;
for (byte_iterator = 0; byte_iterator < 4; byte_iterator++) {
byte = (value & mask) / shift;
printf(" ");
for (bit_iterator = 0; bit_iterator < 8; bit_iterator++) {
if (byte & 0x80)
printf("1");
else
printf("0");
byte *= 2;
}
mask /= 256;
shift /= 256;
}
}
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