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#ifndef SERVICE_H
#define SERVICE_H
#include <spawn.h>
#define MAXLEN 512
#define _PATH_LAUNCHCTL "/bin/launchctl"
#define _NAME_SKHD_PLIST "com.koekeishiya.skhd"
#define _PATH_SKHD_PLIST "/Users/%s/Library/LaunchAgents/"_NAME_SKHD_PLIST".plist"
#define _SKHD_PLIST \
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" \
"<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" \
"<plist version=\"1.0\">\n" \
"<dict>\n" \
" <key>Label</key>\n" \
" <string>"_NAME_SKHD_PLIST"</string>\n" \
" <key>ProgramArguments</key>\n" \
" <array>\n" \
" <string>%s</string>\n" \
" </array>\n" \
" <key>EnvironmentVariables</key>\n" \
" <dict>\n" \
" <key>PATH</key>\n" \
" <string>%s</string>\n" \
" </dict>\n" \
" <key>RunAtLoad</key>\n" \
" <true/>\n" \
" <key>KeepAlive</key>\n" \
" <true/>\n" \
" <key>StandardOutPath</key>\n" \
" <string>/tmp/skhd_%s.out.log</string>\n" \
" <key>StandardErrorPath</key>\n" \
" <string>/tmp/skhd_%s.err.log</string>\n" \
" <key>ThrottleInterval</key>\n" \
" <integer>30</integer>\n" \
" <key>ProcessType</key>\n" \
" <string>Interactive</string>\n" \
" <key>Nice</key>\n" \
" <integer>-20</integer>\n" \
"</dict>\n" \
"</plist>"
static bool file_exists(char *filename);
static int safe_exec(char *const argv[])
{
pid_t pid;
int status = posix_spawn(&pid, argv[0], NULL, NULL, argv, NULL);
if (status) return 1;
while ((waitpid(pid, &status, 0) == -1) && (errno == EINTR)) {
usleep(1000);
}
if (WIFSIGNALED(status)) {
return 1;
} else if (WIFSTOPPED(status)) {
return 1;
} else {
return WEXITSTATUS(status);
}
}
static void populate_plist_path(char *skhd_plist_path, int size)
{
char *user = getenv("USER");
if (!user) {
error("skhd: 'env USER' not set! abort..\n");
}
snprintf(skhd_plist_path, size, _PATH_SKHD_PLIST, user);
}
static void populate_plist(char *skhd_plist, int size)
{
char *user = getenv("USER");
if (!user) {
error("skhd: 'env USER' not set! abort..\n");
}
char *path_env = getenv("PATH");
if (!path_env) {
error("skhd: 'env PATH' not set! abort..\n");
}
char exe_path[4096];
unsigned int exe_path_size = sizeof(exe_path);
if (_NSGetExecutablePath(exe_path, &exe_path_size) < 0) {
error("skhd: unable to retrieve path of executable! abort..\n");
}
snprintf(skhd_plist, size, _SKHD_PLIST, exe_path, path_env, user, user);
}
static int service_install_internal(char *skhd_plist_path)
{
char skhd_plist[4096];
populate_plist(skhd_plist, sizeof(skhd_plist));
FILE *handle = fopen(skhd_plist_path, "w");
if (!handle) return 1;
size_t bytes = fwrite(skhd_plist, strlen(skhd_plist), 1, handle);
int result = bytes == 1 ? 0 : 1;
fclose(handle);
return result;
}
static int service_install(void)
{
char skhd_plist_path[MAXLEN];
populate_plist_path(skhd_plist_path, sizeof(skhd_plist_path));
if (file_exists(skhd_plist_path)) {
error("skhd: service file '%s' is already installed! abort..\n", skhd_plist_path);
}
return service_install_internal(skhd_plist_path);
}
static int service_uninstall(void)
{
char skhd_plist_path[MAXLEN];
populate_plist_path(skhd_plist_path, sizeof(skhd_plist_path));
if (!file_exists(skhd_plist_path)) {
error("skhd: service file '%s' is not installed! abort..\n", skhd_plist_path);
}
return unlink(skhd_plist_path) == 0 ? 0 : 1;
}
static int service_start(void)
{
char skhd_plist_path[MAXLEN];
populate_plist_path(skhd_plist_path, sizeof(skhd_plist_path));
if (!file_exists(skhd_plist_path)) {
warn("skhd: service file '%s' is not installed! attempting installation..\n", skhd_plist_path);
int result = service_install_internal(skhd_plist_path);
if (result) {
error("skhd: service file '%s' could not be installed! abort..\n", skhd_plist_path);
}
}
const char *const args[] = { _PATH_LAUNCHCTL, "load", "-w", skhd_plist_path, NULL };
return safe_exec((char *const*)args);
}
static int service_restart(void)
{
char skhd_plist_path[MAXLEN];
populate_plist_path(skhd_plist_path, sizeof(skhd_plist_path));
if (!file_exists(skhd_plist_path)) {
error("skhd: service file '%s' is not installed! abort..\n", skhd_plist_path);
}
char skhd_service_id[MAXLEN];
snprintf(skhd_service_id, sizeof(skhd_service_id), "gui/%d/%s", getuid(), _NAME_SKHD_PLIST);
const char *const args[] = { _PATH_LAUNCHCTL, "kickstart", "-k", skhd_service_id, NULL };
return safe_exec((char *const*)args);
}
static int service_stop(void)
{
char skhd_plist_path[MAXLEN];
populate_plist_path(skhd_plist_path, sizeof(skhd_plist_path));
if (!file_exists(skhd_plist_path)) {
error("skhd: service file '%s' is not installed! abort..\n", skhd_plist_path);
}
const char *const args[] = { _PATH_LAUNCHCTL, "unload", "-w", skhd_plist_path, NULL };
return safe_exec((char *const*)args);
}
#endif
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