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#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define POTD_LOGFILE "/tmp/potd.log"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <getopt.h>
#include "options.h"
#include "log.h"
typedef enum opt_type {
OT_INVALID = 0, OT_NOARG, OT_L, OT_LL, OT_STR,
OT_PATH
} opt_type;
struct opt_list;
typedef union opt_ptr {
long int l;
long long int ll;
const char *str;
char *str_dup;
struct opt_list *list;
} opt_ptr;
typedef struct opt_list {
opt_ptr value;
struct opt_list *next;
} opt_list;
struct opt {
opt_type type;
opt_ptr value;
opt_ptr def_value;
int used;
int is_list;
const char *arg_name;
const char *short_help;
const char *help;
};
#define OPT(type, def_value, arg, short_help, help) \
{ type, {0}, {def_value}, 0, 0, arg, short_help, help }
#define OPT_LIST(type, def_values, arg, short_help, help) \
{ type, {0}, {def_values}, 0, 1, arg, short_help, help }
#define OPT_NOARG(arg, short_help, help) \
OPT(OT_NOARG, .ll = 0, arg, short_help, help)
static struct opt options[OPT_MAX+1] = {
OPT_NOARG("log-to-file", "short_help", "help"),
OPT(OT_PATH, .str = POTD_LOGFILE, "log-file", "short help", "help"),
OPT(OT_STR, .ll = NOTICE, "log-level", "short help", "help"),
OPT_NOARG("daemon", "short help", "help"),
OPT_LIST(OT_STR, .ll = 0, "redirect", "short_help", "help"),
OPT_LIST(OT_STR, .ll = 0, "protocol", "short_help", "help"),
OPT_LIST(OT_STR, .ll = 0, "jail", "short_help", "help"),
OPT(OT_INVALID, .ll = 0, NULL, NULL, NULL)
};
static int opt_convert(opt_type t, opt_ptr *d);
static int setopt_list(struct opt *o, const char *optarg);
static int setopt(struct opt *o, const char *optarg);
static int opt_convert(opt_type t, opt_ptr *d)
{
char *endptr = NULL;
switch (t) {
case OT_L:
d->l = strtol(optarg, &endptr, 10);
break;
case OT_LL:
d->ll = strtoll(optarg, &endptr, 10);
break;
case OT_STR:
d->str_dup = strdup(optarg);
break;
case OT_PATH:
d->str_dup = realpath(optarg, NULL);
break;
case OT_NOARG:
case OT_INVALID:
return 1;
}
if (endptr && *endptr != 0)
return 1;
return 0;
}
static int setopt_list(struct opt *o, const char *optarg)
{
opt_list **l;
assert(o && o->type != OT_INVALID);
if (!optarg || o->type == OT_NOARG || !o->is_list)
return 1;
l = &o->value.list;
while (*l) l = &(*l)->next;
*l = (opt_list *) calloc(1, sizeof **l);
if (opt_convert(o->type, &(*l)->value))
return 1;
o->used = 1;
return 0;
}
static int setopt(struct opt *o, const char *optarg)
{
assert(o && o->type != OT_INVALID);
if (o->used && !o->is_list)
return 1;
if (!optarg || o->type == OT_NOARG)
goto noarg;
if (opt_convert(o->type, &o->value))
return 1;
noarg:
o->used = 1;
return 0;
}
int parse_cmdline(int argc, char **argv)
{
int rc, i, option, option_index;
struct option *o = (struct option *) calloc(OPT_MAX+1, sizeof *o);
assert(o);
for (i = 0; i < OPT_MAX; ++i) {
o[i].name = options[i].arg_name;
if (options[i].def_value.ll)
o[i].has_arg = required_argument;
else
o[i].has_arg =
(options[i].type == OT_NOARG ? no_argument : required_argument);
}
rc = 0;
while (1) {
option_index = -1;
option = getopt_long_only(argc, argv, "", o, &option_index);
if (option_index == -1 && option != -1) {
rc = 1;
continue;
}
if (option == -1)
break;
if (!option) {
if (!setopt_list(&options[option_index], optarg)) {
} else if (setopt(&options[option_index], optarg)) {
rc = 1;
goto error;
}
} else {
fprintf(stderr, "%s: unknown option '%c' [0x%X]\n",
argv[0], option, option);
}
}
error:
free(o);
return rc;
}
int getopt_used(opt_name on)
{
return options[on].used;
}
char *
getopt_str(opt_name on)
{
char *str;
assert(options[on].type == OT_STR ||
options[on].type == OT_PATH);
assert(getopt_used(on) || options[on].def_value.str);
str = options[on].value.str_dup;
if (!str)
str = options[on].def_value.str_dup;
assert(str);
return str;
}
char *
getopt_strlist(opt_name on, opt_list **ol)
{
opt_list *o;
assert(options[on].is_list && ol);
assert(options[on].type == OT_STR ||
options[on].type == OT_PATH);
assert(getopt_used(on) && !options[on].def_value.str);
if (*ol) {
o = (*ol)->next;
} else {
o = options[on].value.list;
}
*ol = o;
return (o ? o->value.str_dup : NULL);
}
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