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#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void usage(const char *progname)
{
static const int width = 24;
printf("usage: %s -h\n", progname);
printf(" %s -bo[ABC] [files...]\n\n", progname);
printf("\t%-*s%s\n", width, "-h", "Show this help text");
printf("\t%-*s%s\n", width, "-b bootsector", "Bootsector image");
printf("\t%-*s%s\n", width, "-o output", "Output isofs file");
printf("\t%-*s%s\n", width, "-A abstract_path", "Path in isofs of abstract file");
printf("\t%-*s%s\n", width, "-B bibliography_path", "Path in isofs of bibliography file");
printf("\t%-*s%s\n", width, "-C copyright_path", "Path in isofs of copyright file");
printf("\t%-*s%s\n", width, "files...", "Files to include in the isofs image");
printf("\nFor -A/B/C, the path must refer to a file which exists within the isofs image.\n");
}
#define FLAG_o (1U << 1)
#define FLAG_b (1U << 3)
#define FLAG_A (1U << 5)
#define FLAG_B (1U << 7)
#define FLAG_C (1U << 9)
int main(int argc, char **argv)
{
static const char *optpat = "ho:b:A:B:C:";
static const char *fileopts = "boABC";
char *specialfiles[5] = {
0, 0, "DUMMY.TXT", "DUMMY.TXT", "DUMMY.TXT",
};
#define SPECIALFILE(c) specialfiles[strchr(fileopts, (c)) - fileopts]
uint32_t seen = 0;
int opt, fail = 0;
#define SEEN(flags) ((seen | (flags)) == seen)
#define FLAG(c) (1U << (strchr(optpat, (c)) - optpat))
extern char *optarg;
extern int optind, optopt;
while ((opt = getopt(argc, argv, optpat)) != -1) {
uint32_t flag = opt == '?' ? 0 : FLAG(opt);
if (SEEN(flag)) {
fprintf(stderr, "%s: Duplicate option -%c\n", argv[0], opt);
fail = 1;
continue;
}
seen |= flag;
switch (opt) {
case 'h':
usage(argv[0]);
return 0;
case 'b':
case 'o':
case 'A':
case 'B':
case 'C':
SPECIALFILE(opt) = optarg;
break;
default:
fail = 1;
}
}
for (const char *c = "bo"; *c; c++) {
if (!SEEN(FLAG(*c))) {
fprintf(stderr, "%s: Missing required option -%c\n", argv[0], *c);
fail = 1;
}
}
if (fail) {
fprintf(stderr, "\nUse -h option for help on correct usage.\n");
return 1;
}
char *argprefix[] = {
"mkisofs", "-graft-points", "-full-iso9660-filenames",
"-G", SPECIALFILE('b'),
"-o", SPECIALFILE('o'),
"-abstract", SPECIALFILE('A'),
"-biblio", SPECIALFILE('B'),
"-copyright", SPECIALFILE('C'),
};
#define ARRAYLEN(a) (sizeof(a) / sizeof *(a))
char **args = calloc(argc - optind + ARRAYLEN(argprefix) + 2, sizeof *args);
if (!args) {
perror("malloc");
return 1;
}
size_t argidx;
for (argidx = 0; argidx < ARRAYLEN(argprefix); argidx++)
args[argidx] = argprefix[argidx];
while (argv[optind])
args[argidx++] = argv[optind++];
if (!SEEN(FLAG_A | FLAG_B | FLAG_C))
args[argidx++] = "DUMMY.TXT=/dev/null";
execvp("mkisofs", args);
perror("exec");
return 1;
}
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