sbase/od.c
FRIGN 8163451249 Check parseoffset return value in od(1)
Yeah, kinda embarassing. Forgot about that.
2015-09-30 19:44:10 +01:00

164 lines
3.3 KiB
C

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static size_t bytes_per_line = 16;
static off_t maxbytes = -1;
static off_t skip = 0;
static unsigned char radix = 'o';
static unsigned char type = 'o';
static void
printaddress(FILE *f, off_t addr)
{
char fmt[] = "%07j# ";
if (radix == 'n') {
fputc(' ', f);
} else {
fmt[4] = radix;
fprintf(f, fmt, (intmax_t)addr);
}
}
static void
printchar(FILE *f, unsigned char c)
{
const char *namedict[] = {
"nul", "soh", "stx", "etx", "eot", "enq", "ack",
"bel", "bs", "ht", "nl", "vt", "ff", "cr",
"so", "si", "dle", "dc1", "dc2", "dc3", "dc4",
"nak", "syn", "etb", "can", "em", "sub", "esc",
"fs", "gs", "rs", "us", "sp",
};
const char *escdict[] = {
['\0'] = "\\0", ['\a'] = "\\a",
['\b'] = "\\b", ['\t'] = "\\t",
['\n'] = "\\n", ['\v'] = "\\v",
['\f'] = "\\f", ['\r'] = "\\r",
};
const char *fmtdict[] = {
['d'] = "%4hhd ", ['o'] = "%03hho ",
['u'] = "%3hhu ", ['x'] = "%02hhx ",
};
switch (type) {
case 'a':
c &= ~128; /* clear high bit as required by standard */
if (c < LEN(namedict) || c == 127) {
fprintf(f, "%3s ", (c == 127) ? "del" : namedict[c]);
} else {
fprintf(f, "%3c ", c);
}
break;
case 'c':
if (strchr("\a\b\t\n\b\f\r\0", c)) {
fprintf(f, "%3s ", escdict[c]);
} else {
fprintf(f, "%3c ", c);
}
break;
default:
fprintf(f, fmtdict[type], c);
}
}
static void
od(FILE *in, char *in_name, FILE *out, char *out_name)
{
off_t addr;
size_t i, chunklen;
unsigned char buf[BUFSIZ];
for (addr = 0; (chunklen = fread(buf, 1, BUFSIZ, in)); ) {
for (i = 0; i < chunklen && (maxbytes == -1 ||
(addr - skip) < maxbytes); ++i, ++addr) {
if (addr - skip < 0)
continue;
if (((addr - skip) % bytes_per_line) == 0) {
if (addr - skip)
fputc('\n', out);
printaddress(out, addr);
}
printchar(out, buf[i]);
}
if (feof(in) || ferror(in) || ferror(out))
break;
}
if (addr)
fputc('\n', out);
if (radix != 'n') {
printaddress(out, addr);
fputc('\n', out);
}
}
static void
usage(void)
{
eprintf("usage: %s [-A d|o|x|n] [-t a|c|d|o|u|x] [-v] [file ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp;
int ret = 0;
char *s;
ARGBEGIN {
case 'A':
s = EARGF(usage());
if (strlen(s) != 1 || !strchr("doxn", s[0]))
usage();
radix = s[0];
break;
case 'j':
if ((skip = parseoffset(EARGF(usage()))) < 0)
return 1;
break;
case 'N':
if ((maxbytes = parseoffset(EARGF(usage()))) < 0)
return 1;
break;
case 't':
s = EARGF(usage());
if (strlen(s) != 1 || !strchr("acdoux", s[0]))
usage();
type = s[0];
break;
case 'v':
/* Always set. Use "uniq -f 1 -c" to handle duplicate lines. */
break;
default:
usage();
} ARGEND;
if (!argc) {
od(stdin, "<stdin>", stdout, "<stdout>");
} else {
for (; *argv; argc--, argv++) {
if (!strcmp(*argv, "-")) {
*argv = "<stdin>";
fp = stdin;
} else if (!(fp = fopen(*argv, "r"))) {
weprintf("fopen %s:", *argv);
ret = 1;
continue;
}
od(fp, *argv, stdout, "<stdout>");
if (fp != stdin && fshut(fp, *argv))
ret = 1;
}
}
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>") |
fshut(stderr, "<stderr>");
return ret;
}