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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include "options.h"
static void printUsage(char *progname)
{
printf("Usage: %s [OPTIONS] <elf-file>\n", progname);
printf("\n"
"Options:\n"
" -h, --help Print this help message\n"
" -o, --output Where to write the modified ELF file to\n"
"\n"
" --print-header Print ELF header\n"
" --print-segments Print program headers\n"
" --print-sections Print sections\n"
"\n"
" --insert-before off,sz Insert spacing at given offset\n"
"\n");
}
void parseOptions(CLIOpts *opts, int argc, char **argv)
{
char *progname = argv[0];
int c;
int option_index = 0;
char *endptr;
static struct option long_options[] = {
{"help", 0, 0, 'h'},
{"output", 1, 0, 'o'},
{"print-header", 0, 0, 10001},
{"print-segments", 0, 0, 10002},
{"print-sections", 0, 0, 10003},
{"insert-before", 1, 0, 10004},
{NULL, 0, NULL, 0}
};
while ((c = getopt_long(argc, argv, "e:ho:",
long_options, &option_index)) != -1) {
switch (c) {
case 'h':
printUsage(progname);
exit(EXIT_SUCCESS);
case 'o':
opts->fnOutput = optarg;
break;
case 10001:
opts->printHeader = 1;
break;
case 10002:
opts->printSegments = 1;
break;
case 10003:
opts->printSections = 1;
break;
case 10004:
opts->insertBeforeOffs = strtoul(optarg, &endptr, 0);
if (endptr[0] != ',') {
goto USAGE;
}
opts->insertBeforeSz = strtoul(endptr + 1, &endptr, 0);
if (endptr[0] != '\0' || opts->insertBeforeSz == 0) {
goto USAGE;
}
break;
case '?':
default:
goto USAGE;
}
}
while (optind < argc) {
if (!opts->fnInput) {
opts->fnInput = argv[optind];
}
optind++;
}
if (!opts->fnInput) {
fprintf(stderr, "Error: No input file specified.\n\n");
goto USAGE;
}
return;
USAGE:
printUsage(progname);
exit(1);
}
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