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main.c
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main.c
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// IWYU pragma: no_include <bits/getopt_core.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include "cfg.h"
#include "client.h"
#include "convert.h"
#include "ipc.h"
#include "list.h"
#include "log.h"
#include "server.h"
void usage(FILE *stream) {
static char mesg[] =
"Usage: way-displays [OPTIONS...] [COMMAND]\n"
" Runs the server when no COMMAND specified.\n"
"OPTIONS\n"
" -L, --l[og-threshold] <debug|info|warning|error>\n"
"COMMANDS\n"
" -h, --h[elp] show this message\n"
" -v, --v[ersion] display version information\n"
" -g, --g[et] show the active settings\n"
" -w, --w[rite] write active to cfg.yaml\n"
" -s, --s[et] add or change\n"
" ARRANGE_ALIGN <row|column> <top|middle|bottom|left|right>\n"
" ORDER <name> ...\n"
" AUTO_SCALE <on|off>\n"
" SCALE <name> <scale>\n"
" MODE <name> MAX\n"
" MODE <name> <width> <height> [<Hz>]\n"
" DISABLED <name>\n"
" -d, --d[elete] remove\n"
" SCALE <name>\n"
" MODE <name>\n"
" DISABLED <name>\n"
;
fprintf(stream, "%s", mesg);
}
struct Cfg *parse_element(enum IpcRequestCommand command, enum CfgElement element, int argc, char **argv) {
struct UserScale *user_scale = NULL;
struct UserMode *user_mode = NULL;
struct Cfg *cfg = calloc(1, sizeof(struct Cfg));
bool parsed = false;
switch (element) {
case ARRANGE_ALIGN:
parsed = (cfg->arrange = arrange_val_start(argv[optind]));
parsed = (cfg->align = align_val_start(argv[optind + 1]));
break;
case AUTO_SCALE:
parsed = (cfg->auto_scale = auto_scale_val(argv[optind]));
break;
case SCALE:
switch (command) {
case CFG_SET:
// parse input value
user_scale = (struct UserScale*)calloc(1, sizeof(struct UserScale));
user_scale->name_desc = strdup(argv[optind]);
parsed = ((user_scale->scale = strtof(argv[optind + 1], NULL)) > 0);
slist_append(&cfg->user_scales, user_scale);
break;
case CFG_DEL:
// dummy value
user_scale = (struct UserScale*)calloc(1, sizeof(struct UserScale));
user_scale->name_desc = strdup(argv[optind]);
user_scale->scale = 1;
slist_append(&cfg->user_scales, user_scale);
parsed = true;
break;
default:
break;
}
break;
case MODE:
switch (command) {
case CFG_SET:
// parse input value
user_mode = cfg_user_mode_default();
user_mode->name_desc = strdup(argv[optind]);
if (strcasecmp(argv[optind + 1], "MAX") == 0) {
user_mode->max = true;
parsed = true;
} else {
if (optind + 2 < argc) {
parsed = ((user_mode->width = atoi(argv[optind + 1])) > 0);
parsed = ((user_mode->height = atoi(argv[optind + 2])) > 0);
}
if (optind + 3 < argc) {
parsed = ((user_mode->refresh_hz = atoi(argv[optind + 3])) > 0);
}
}
slist_append(&cfg->user_modes, user_mode);
break;
case CFG_DEL:
// dummy value
user_mode = cfg_user_mode_default();
user_mode->name_desc = strdup(argv[optind]);
user_mode->max = true;
slist_append(&cfg->user_modes, user_mode);
parsed = true;
break;
default:
break;
}
break;
case DISABLED:
for (int i = optind; i < argc; i++) {
slist_append(&cfg->disabled_name_desc, strdup(argv[i]));
}
parsed = true;
break;
case ORDER:
for (int i = optind; i < argc; i++) {
slist_append(&cfg->order_name_desc, strdup(argv[i]));
}
parsed = true;
break;
default:
break;
}
if (!parsed) {
char buf[256];
char *bp = buf;
for (int i = optind; i < argc; i++) {
bp += snprintf(bp, sizeof(buf) - (bp - buf), " %s", argv[i]);
}
log_error("invalid %s%s", cfg_element_name(element), buf);
exit(EXIT_FAILURE);
}
return cfg;
}
struct IpcRequest *parse_get(int argc, char **argv) {
if (optind != argc) {
log_error("--get takes no arguments");
exit(EXIT_FAILURE);
}
struct IpcRequest *request = calloc(1, sizeof(struct IpcRequest));
request->command = GET;
return request;
}
struct IpcRequest *parse_write(int argc, char **argv) {
if (optind != argc) {
log_error("--write takes no arguments");
exit(EXIT_FAILURE);
}
struct IpcRequest *request = calloc(1, sizeof(struct IpcRequest));
request->command = CFG_WRITE;
return request;
}
struct IpcRequest *parse_set(int argc, char **argv) {
enum CfgElement element = cfg_element_val(optarg);
switch (element) {
case MODE:
if (optind + 2 > argc || optind + 4 < argc) {
log_error("%s requires two to four arguments", cfg_element_name(element));
exit(EXIT_FAILURE);
}
break;
case ARRANGE_ALIGN:
case SCALE:
if (optind + 2 != argc) {
log_error("%s requires two arguments", cfg_element_name(element));
exit(EXIT_FAILURE);
}
break;
case AUTO_SCALE:
case DISABLED:
if (optind + 1 != argc) {
log_error("%s requires one argument", cfg_element_name(element));
exit(EXIT_FAILURE);
}
break;
case ORDER:
if (optind + 1 > argc) {
log_error("%s requires at least one argument", cfg_element_name(element));
exit(EXIT_FAILURE);
}
break;
default:
log_error("invalid %s: %s", ipc_request_command_friendly(CFG_SET), element ? cfg_element_name(element) : optarg);
exit(EXIT_FAILURE);
}
struct IpcRequest *request = calloc(1, sizeof(struct IpcRequest));
request->command = CFG_SET;
request->cfg = parse_element(CFG_SET, element, argc, argv);
return request;
}
struct IpcRequest *parse_del(int argc, char **argv) {
enum CfgElement element = cfg_element_val(optarg);
switch (element) {
case MODE:
case SCALE:
case DISABLED:
if (optind + 1 != argc) {
log_error("%s requires one argument", cfg_element_name(element));
exit(EXIT_FAILURE);
}
break;
default:
log_error("invalid %s: %s", ipc_request_command_friendly(CFG_DEL), element ? cfg_element_name(element) : optarg);
exit(EXIT_FAILURE);
}
struct IpcRequest *request = calloc(1, sizeof(struct IpcRequest));
request->command = CFG_DEL;
request->cfg = parse_element(CFG_DEL, element, argc, argv);
return request;
}
bool parse_log_threshold(char *optarg) {
enum LogThreshold threshold = log_threshold_val(optarg);
if (!threshold) {
log_error("invalid --log-threshold %s", optarg);
return false;
}
log_set_threshold(threshold, true);
return true;
}
struct IpcRequest *parse_args(int argc, char **argv) {
static struct option long_options[] = {
{ "delete", required_argument, 0, 'd' },
{ "get", no_argument, 0, 'g' },
{ "help", no_argument, 0, 'h' },
{ "log-threshold", required_argument, 0, 'L' },
{ "set", required_argument, 0, 's' },
{ "version", no_argument, 0, 'v' },
{ "write", no_argument, 0, 'w' },
{ 0, 0, 0, 0 }
};
static char *short_options = "d:ghL:s:vw";
int c;
while (1) {
int long_index = 0;
c = getopt_long(argc, argv, short_options, long_options, &long_index);
if (c == -1)
break;
switch (c) {
case 'L':
if (!parse_log_threshold(optarg)) {
exit(EXIT_FAILURE);
}
break;
case 'h':
usage(stdout);
exit(EXIT_SUCCESS);
case 'v':
log_info("way-displays version %s", VERSION);
exit(EXIT_SUCCESS);
case 'g':
return parse_get(argc, argv);
case 's':
return parse_set(argc, argv);
case 'd':
return parse_del(argc, argv);
case 'w':
return parse_write(argc, argv);
case '?':
default:
usage(stderr);
exit(EXIT_FAILURE);
}
}
return NULL;
}
int
main(int argc, char **argv) {
setlinebuf(stdout);
if (!getenv("WAYLAND_DISPLAY")) {
log_error("environment variable $WAYLAND_DISPLAY missing");
exit(1);
}
struct IpcRequest *ipc_request = parse_args(argc, argv);
if (ipc_request) {
return client(ipc_request);
} else {
return server();
}
}