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#define _XOPEN_SOURCE 700
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
union block {
char c[16];
short s[16 / sizeof(short)];
unsigned short us[16 / sizeof(unsigned short)];
int i[16 / sizeof(int)];
unsigned int ui[16 / sizeof(unsigned int)];
long l[16 / sizeof(long)];
unsigned long ul[16 / sizeof(unsigned long)];
long long ll[16 / sizeof(long long)];
unsigned long long ull[16 / sizeof(unsigned long long)];
float f[16 / sizeof(float)];
double d[16 / sizeof(double)];
long double ld[16 / sizeof(long double)];
};
static int escapes = 0;
static int verbose = 0;
static int addoutput(const char *type)
{
(void)type;
return 0;
}
static int od(const char *filename, char address_base, unsigned long skip, unsigned long skipsize, unsigned long maxbytes)
{
FILE *in = stdin;
union block prev;
union block b;
size_t nread = 0;
int star = 0;
char basefmt[] = { '%', '0', '7', 'z', address_base, ' ', '\0' };
if (strcmp(filename, "-")) {
in = fopen(filename, "rb");
if (in == NULL) {
fprintf(stderr, "od: couldn't open %s: %s\n", filename, strerror(errno));
return 1;
}
}
if (skip > skipsize) {
unsigned long tmp = skip;
skip = skipsize;
skipsize = tmp;
}
for (unsigned long i = 0; i < skip; i++) {
fseek(in, skipsize, SEEK_SET);
nread += skipsize;
}
while ((fread(&b, sizeof(b), 1, in)) == 1) {
nread += sizeof(b);
if (maxbytes && nread >= maxbytes) {
break;
}
if (!verbose && memcmp(&prev, &b, sizeof(b)) == 0) {
if (!star) {
printf("*\n");
star = 1;
}
continue;
}
star = 0;
if (address_base != 'n') {
printf(basefmt, nread - sizeof(b));
}
/* TODO: this loop */
size_t nloops = sizeof(b.s) / sizeof(b.s[0]);
for (size_t i = 0; i < nloops; i++) {
printf("%06ho%c", b.s[i], i == nloops - 1 ? '\n' : ' ');
}
memcpy(&prev, &b, sizeof(b));
}
return 0;
}
int main(int argc, char *argv[])
{
char *endopt = NULL;
unsigned long skip = 0;
unsigned long maxbytes = 0;
unsigned long skipsize = 1;
int xsi_offset = 1;
char address_base = 'o';
int c;
setlocale(LC_ALL, "");
while ((c = getopt(argc, argv, "A:bcdj:Nost:vx")) != -1) {
switch (c) {
case 'A':
xsi_offset = 0;
if (strlen(optarg) != 1) {
return 1;
}
address_base = *optarg;
if (address_base != 'd' && address_base != 'o' && address_base != 'x' && address_base != 'n') {
return 1;
}
break;
case 'b':
addoutput("o1");
break;
case 'c':
escapes = 1;
break;
case 'd':
addoutput("u2");
break;
case 'j':
xsi_offset = 0;
skip = strtoul(optarg, &endopt, 0);
switch (*endopt) {
case 'b':
skipsize = 512;
break;
case 'k':
skipsize = 1024;
break;
case 'm':
skipsize = 1024 * 1024;
break;
case '\0':
break;
default:
fprintf(stderr, "od: unknown suffix '%c'\n", *endopt);
return 1;
}
break;
case 'N':
xsi_offset = 0;
maxbytes = strtoul(optarg, NULL, 0);
break;
case 'o':
addoutput("o2");
break;
case 's':
addoutput("d2");
break;
case 't':
xsi_offset = 0;
if (addoutput(optarg) != 0) {
return 1;
}
break;
case 'v':
xsi_offset = 0;
verbose = 1;
break;
case 'x':
addoutput("x2");
break;
default:
return 1;
}
}
if (xsi_offset) {
/* check argv[argc-1] */
char *xo = "";
int base = 8;
size_t len = strlen(xo);
/* ignore leading '+' */
if (*xo == '+') {
xo++;
len--;
}
if (len > 1 && xo[len-1] == 'b') {
skipsize = 512;
xo[len-1] = '\0';
len--;
}
if (len > 1 && xo[len-1] == '.') {
base = 10;
xo[len-1] = '\0';
}
skip = strtoul(argv[argc-1], NULL, base);
}
int ret = 0;
do {
ret |= od(argv[optind++], address_base, skip, skipsize, maxbytes);
} while (argv[optind]);
return ret;
}
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