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caniadd/src/config.c

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#include <stddef.h>
#include <inttypes.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
//#include <toml.h>
#include <limits.h>
#include <time.h>
#include <unistd.h>
#include <ctype.h>
#include "config.h"
#include "error.h"
#include "util.h"
static int show_help(struct conf_entry *ce);
static int config_parse_file();
static enum error config_required_check();
static int config_set_str(struct conf_entry *ce, char *arg);
static int config_set_port(struct conf_entry *ce, char *arg);
static int config_set_bool(struct conf_entry *ce, char *arg);
//static int config_def_cachedb(struct conf_entry *ce);
//static int config_action_write_config(struct conf_entry *ce);
/* Everything not explicitly defined, is 0 */
/* If an option only has a long name, the short name also has to be
* defined. For example, a number larger than UCHAR_MAX */
static struct conf_entry options[] = {
{ .l_name = "help", .s_name = 'h', .has_arg = no_argument,
.action_func = show_help, .in_args = true,
.type = OTYPE_ACTION, .handle_order = 0 },
/*
{ .l_name = "config-dir", .s_name = 'b', .has_arg = required_argument,
.default_func = config_def_config_dir, .set_func = config_set_str,
.in_args = true, .type = OTYPE_S, .handle_order = 0 },
{ .l_name = "default-download-dir", .s_name = 'd', .has_arg = required_argument,
.default_func = config_def_default_download_dir, .set_func = config_set_str,
.in_file = true, .in_args = true, .type = OTYPE_S, .handle_order = 1 },
{ .l_name = "port", .s_name = 'p', .has_arg = required_argument,
.set_func = config_set_port, .value.hu = 21729, .value_is_set = true,
.in_file = true, .in_args = true, .type = OTYPE_HU, .handle_order = 1 },
{ .l_name = "foreground", .s_name = 'f', .has_arg = no_argument,
.set_func = config_set_bool, .value.b = false, .value_is_set = true,
.in_args = true, .type = OTYPE_B, .handle_order = 1 },
{ .l_name = "write-config", .s_name = UCHAR_MAX + 1, .has_arg = no_argument,
.action_func = config_action_write_config, .value_is_set = true,
.in_args = true, .type = OTYPE_ACTION, .handle_order = 2 },
{ .l_name = "peer-id", .s_name = UCHAR_MAX + 2, .has_arg = required_argument,
.default_func = config_def_peer_id, .type = OTYPE_S, .handle_order = 1 },
*/
{ .l_name = "username", .s_name = 'u', .has_arg = required_argument,
.set_func = config_set_str, .in_args = true, .in_file = true,
.type = OTYPE_S, .handle_order = 1 },
{ .l_name = "password", .s_name = 'p', .has_arg = required_argument,
.set_func = config_set_str, .in_args = true, .in_file = true,
.type = OTYPE_S, .handle_order = 1 },
{ .l_name = "port", .s_name = 'P', .has_arg = required_argument,
.set_func = config_set_port, .in_args = true, .in_file = true,
.type = OTYPE_HU, .handle_order = 1, .value.hu = 29937,
.value_is_set = true },
{ .l_name = "api-server", .s_name = UCHAR_MAX + 1, .has_arg = required_argument,
.set_func = config_set_str, .in_args = true, .in_file = true,
.type = OTYPE_S, .handle_order = 1, .value.s = "api.anidb.net:9000",
.value_is_set = true },
{ .l_name = "api-key", .s_name = 'k', .has_arg = required_argument,
.set_func = config_set_str, .in_args = true, .in_file = true,
.type = OTYPE_S, .handle_order = 1, },
{ .l_name = "save-session", .s_name = 's', .has_arg = no_argument,
.set_func = config_set_bool, .in_args = true, .in_file = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "destroy-session", .s_name = 'S', .has_arg = no_argument,
.set_func = config_set_bool, .in_args = true, .in_file = false,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "watched", .s_name = 'w', .has_arg = no_argument,
.set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "link", .s_name = 'l', .has_arg = no_argument,
.set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "cachedb", .s_name = 'd', .has_arg = required_argument,
.set_func = config_set_str, .in_args = true, .in_file = true,
.type = OTYPE_S, .handle_order = 1, /*.default_func = config_def_cachedb*/ },
{ .l_name = "debug", .s_name = 'D', .has_arg = no_argument,
.set_func = config_set_bool, .in_args = true, .in_file = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true, },
/*### cmd ###*/
{ .l_name = "server-version", .s_name = UCHAR_MAX + 2,
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "version", .s_name = 'v',
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "uptime", .s_name = UCHAR_MAX + 3,
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },
{ .l_name = "ed2k", .s_name = 'e',
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1 },
{ .l_name = "add", .s_name = 'a',
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1 },
/*{ .l_name = "stats", .s_name = UCHAR_MAX + 4,
.has_arg = no_argument, .set_func = config_set_bool, .in_args = true,
.type = OTYPE_B, .handle_order = 1, .value_is_set = true },*/
};
static const size_t options_count = sizeof(options) / sizeof(options[0]);
static const char **opt_argv = NULL;
static int opt_argc = 0;
static void config_build_getopt_args(char out_sopt[options_count * 2 + 1],
struct option out_lopt[options_count + 1])
{
int i_sopt = 0, i_lopt = 0;
for (int i = 0; i < options_count; i++) {
/* Short options */
if (options[i].s_name && options[i].s_name <= UCHAR_MAX) {
out_sopt[i_sopt++] = options[i].s_name;
if (options[i].has_arg == required_argument)
out_sopt[i_sopt++] = ':';
assert(options[i].has_arg == required_argument ||
options[i].has_arg == no_argument);
}
/* Long options */
if (options[i].l_name) {
assert(options[i].s_name);
out_lopt[i_lopt].name = options[i].l_name;
out_lopt[i_lopt].has_arg = options[i].has_arg;
out_lopt[i_lopt].flag = NULL;
out_lopt[i_lopt].val = options[i].s_name;
i_lopt++;
}
}
out_sopt[i_sopt] = '\0';
memset(&out_lopt[i_lopt], 0, sizeof(struct option));
}
static int config_read_args(int argc, char **argv, char sopt[options_count * 2 + 1],
struct option lopt[options_count + 1], int level)
{
int optc, err = NOERR;
optind = 1;
while ((optc = getopt_long(argc, argv, sopt,
lopt, NULL)) >= 0) {
bool handled = false;
for (int i = 0; i < options_count; i++) {
if (options[i].handle_order != level) {
/* Lie a lil :x */
handled = true;
continue;
}
if (optc == options[i].s_name) {
if (options[i].type != OTYPE_ACTION)
err = options[i].set_func(&options[i], optarg);
else
err = options[i].action_func(&options[i]);
if (err != NOERR)
goto end;
options[i].value_is_set = true;
handled = true;
break;
}
}
if (handled)
continue;
if (optc == '?') {
err = ERR_OPT_FAILED;
goto end;
} else {
fprintf(stderr, "Unhandled option? '%c'\n", optc);
err = ERR_OPT_UNHANDLED;
goto end;
}
}
end:
return err;
}
static enum error config_required_check()
{
enum error err = NOERR;
for (int i = 0; i < options_count; i++) {
if (options[i].required && !options[i].value_is_set) {
printf("Argument %s is required!\n", options[i].l_name);
err = ERR_OPT_REQUIRED;
}
}
return err;
}
enum error config_parse(int argc, char **argv)
{
enum error err = NOERR;
char sopt[options_count * 2 + 1];
struct option lopt[options_count + 1];
opt_argv = (const char**)argv;
opt_argc = argc;
config_build_getopt_args(sopt, lopt);
err = config_read_args(argc, argv, sopt, lopt, 0);
if (err != NOERR)
goto end;
err = config_parse_file();
if (err != NOERR)
goto end;
err = config_read_args(argc, argv, sopt, lopt, 1);
if (err != NOERR)
goto end;
/* Set defaults for those, that didn't got set above */
for (int i = 0; i < options_count; i++) {
if (!options[i].value_is_set && options[i].type != OTYPE_ACTION &&
options[i].default_func) {
err = options[i].default_func(&options[i]);
if (err != NOERR)
goto end;
options[i].value_is_set = true;
}
}
err = config_read_args(argc, argv, sopt, lopt, 2);
if (err != NOERR)
goto end;
err = config_required_check();
end:
if (err != NOERR)
config_free();
return err;
}
#if 0
static int config_def_config_dir(struct conf_entry *ce)
{
char *dir;
int len;
const char *format = "%s/.config/" CONFIG_DIR_NAME;
const char *home_env = getenv("HOME");
if (!home_env) {
/* Fix this at a later date with getuid and getpw */
fprintf(stderr, "HOME environment variable not found!\n");
return ERR_NOTFOUND;
}
len = snprintf(NULL, 0, format, home_env);
if (len == -1) {
int err = errno;
fprintf(stderr, "Failed to call funky snpintf: %s\n", strerror(err));
return err;
}
dir = malloc(len + 1);
sprintf(dir, format, home_env);
ce->value.s = dir;
ce->value_is_dyn = true;
return NOERR;
}
#endif
#if 0
static int config_def_cachedb(struct conf_entry *ce)
{
bool dh_free = false;
const char *data_home = getenv("XDG_DATA_HOME");
if (!data_home) {
const char *home = util_get_home();
if (!home)
return ERR_OPT_FAILED;
sprintf(NULL, "%s/.local/share", home);
}
return NOERR;
}
#endif
static int config_set_str(struct conf_entry *ce, char *arg)
{
// TODO use realpath(3), when necessary
ce->value.s = arg;
return NOERR;
}
static int config_set_port(struct conf_entry *ce, char *arg)
{
long portval = strtol(arg, NULL, 10);
/* A zero return will be invalid no matter if strtol succeeded or not */
if (portval > UINT16_MAX || portval <= 0) {
fprintf(stderr, "Invalid port value '%s'\n", arg);
return ERR_OPT_INVVAL;
}
ce->value.hu = (uint16_t)portval;
return NOERR;
}
static int config_set_bool(struct conf_entry *ce, char *arg)
{
ce->value.b = true;
return NOERR;
}
static int show_help(struct conf_entry *ce)
{
printf("Todo...\n");
return ERR_OPT_EXIT;
}
static int config_parse_file()
{
// TODO implement this
#if 0
assert(conf.config_file_path);
FILE *f = fopen(conf.config_file_path, "rb");
char errbuf[200];
toml_table_t *tml = toml_parse_file(f, errbuf, sizeof(errbuf));
fclose(f);
if (!tml) {
fprintf(stderr, "Failed to parse config toml: %s\n", errbuf);
return ERR_TOML_PARSE_ERROR;
}
toml_datum_t port = toml_int_in(tml, "port");
if (port.ok)
conf.port = (uint16_t)port.u.i;
else
fprintf(stderr, "Failed to parse port from config toml: %s\n", errbuf);
toml_datum_t dldir = toml_string_in(tml, "default_download_dir");
if (dldir.ok) {
conf.default_download_dir = dldir.u.s;
printf("%s\n", dldir.u.s);
conf_dyn.default_download_dir = dldir.u.s;
conf_dyn.default_download_dir = true;
/* TODO is this always malloced?? if yes, remve dyn check */
} else {
fprintf(stderr, "Failed to parse download dir from config toml: %s\n", errbuf);
}
toml_free(tml);
#endif
return NOERR;
}
int config_free()
{
for (int i = 0; i < options_count; i++) {
if (options[i].value_is_dyn) {
free(options[i].value.s);
options[i].value.s = NULL;
options[i].value_is_dyn = false;
options[i].value_is_set = false;
}
}
return NOERR;
}
#if 0
static int config_action_write_config(struct conf_entry *ce)
{
/* This is the success return here */
int err = ERR_OPT_EXIT, plen;
const char *config_dir;
FILE *f = NULL;
config_dir = config_get("config-dir");
plen = snprintf(NULL, 0, "%s/%s", config_dir, CONFIG_FILE_NAME);
char path[plen + 1];
snprintf(path, plen + 1, "%s/%s", config_dir, CONFIG_FILE_NAME);
for (int i = 0; i < 2; i++) {
f = fopen(path, "wb");
if (!f) {
int errn = errno;
if (errn == ENOENT && i == 0) {
/* Try to create parent directory */
if (mkdir(config_dir, 0755) == -1) {
err = errno;
fprintf(stderr, "Config mkdir failed: %s\n", strerror(err));
goto end;
}
} else {
err = errn;
fprintf(stderr, "Config fopen failed: %s\n", strerror(err));
goto end;
}
} else {
break;
}
}
for (int i = 0; i < options_count; i++) {
if (!options[i].in_file)
continue;
fprintf(f, "%s = ", options[i].l_name);
switch (options[i].type) {
case OTYPE_S:
// TODO toml escaping
fprintf(f, "\"%s\"\n", options[i].value.s);
break;
case OTYPE_HU:
fprintf(f, "%hu\n", options[i].value.hu);
break;
case OTYPE_B:
fprintf(f, "%s\n", options[i].value.b ? "true" : "false");
break;
default:
break;
}
}
config_dump();
end:
if (f)
fclose(f);
return err;
}
#endif
enum error config_get(const char *key, void **out)
{
enum error err = ERR_OPT_NOTFOUND;
for (int i = 0; i < options_count; i++) {
struct conf_entry *cc = &options[i];
if (strcmp(cc->l_name, key) == 0) {
if (cc->value_is_set) {
if (out)
*out = &cc->value.s;
err = NOERR;
} else {
err = ERR_OPT_UNSET;
}
break;
}
}
return err;
}
const char *config_get_nonopt(int index)
{
if (index >= config_get_nonopt_count())
return NULL;
return opt_argv[optind + index];
}
int config_get_nonopt_count()
{
return opt_argc - optind;
}
void config_dump()
{
for (int i = 0; i < options_count; i++) {
if (options[i].type == OTYPE_ACTION)
continue;
printf("%s: ", options[i].l_name);
if (!options[i].value_is_set) {
printf("[UNSET (>.<)]\n");
continue;
}
switch (options[i].type) {
case OTYPE_S:
printf("%s\n", options[i].value.s);
break;
case OTYPE_HU:
printf("%hu\n", options[i].value.hu);
break;
case OTYPE_B:
printf("%s\n", options[i].value.b ? "True" : "False");
break;
default:
printf("Error :(\n");
break;
}
}
}
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