114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
#include <fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <libreborn/util.h>
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#include <libreborn/config.h>
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#include <libreborn/env.h>
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// Safe Version Of pipe()
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void safe_pipe2(int pipefd[2], int flags) {
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if (pipe2(pipefd, flags) != 0) {
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ERR("Unable To Create Pipe: %s", strerror(errno));
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}
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}
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// Check If Two Percentages Are Different Enough To Be Logged
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#define SIGNIFICANT_PROGRESS 5
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int is_progress_difference_significant(int32_t new_val, int32_t old_val) {
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if (new_val != old_val) {
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if (new_val == -1 || old_val == -1) {
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return 1;
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} else if (new_val == 0 || new_val == 100) {
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return 1;
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} else {
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return new_val - old_val >= SIGNIFICANT_PROGRESS;
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}
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} else {
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return 0;
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}
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}
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// Lock File
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int lock_file(const char *file) {
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int fd = open(file, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
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if (fd == -1) {
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ERR("Unable To Open Lock File: %s: %s", file, strerror(errno));
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}
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if (flock(fd, LOCK_EX) == -1) {
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ERR("Unable To Lock File: %s: %s", file, strerror(errno));
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}
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return fd;
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}
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void unlock_file(const char *file, const int fd) {
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if (flock(fd, LOCK_UN) == -1) {
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ERR("Unable To Unlock File: %s: %s", file, strerror(errno));
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}
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close(fd);
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}
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// Access Configuration At Runtime
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const char *reborn_get_version() {
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return MCPI_VERSION;
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}
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int reborn_is_headless() {
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static int ret;
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static int is_set = 0;
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if (!is_set) {
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ret = reborn_is_server();
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if (getenv(_MCPI_FORCE_HEADLESS_ENV)) {
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ret = 1;
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} else if (getenv(_MCPI_FORCE_NON_HEADLESS_ENV)) {
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ret = 0;
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}
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is_set = 1;
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}
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return ret;
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}
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int reborn_is_server() {
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static int ret;
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static int is_set = 0;
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if (!is_set) {
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ret = getenv(_MCPI_SERVER_MODE_ENV) != NULL;
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is_set = 1;
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}
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return ret;
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}
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// Check $DISPLAY
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void reborn_check_display() {
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if (!getenv("DISPLAY") && !getenv("WAYLAND_DISPLAY")) {
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ERR("No display attached! Make sure $DISPLAY or $WAYLAND_DISPLAY is set.");
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}
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}
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// Home Subdirectory
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const char *get_home_subdirectory_for_game_data() {
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if (getenv(MCPI_PROFILE_DIRECTORY_ENV) != NULL) {
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// No Subdirectory When Using Custom Profile Directory
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return "";
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} else if (!reborn_is_server()) {
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// Store Game Data In "~/.minecraft-pi" Instead Of "~/.minecraft" To Avoid Conflicts
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return "/.minecraft-pi";
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} else {
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// Store Game Data In $HOME Root (In Server Mode, $HOME Is Changed To The Launch Directory)
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return "";
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}
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}
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// Make Sure Directory Exists
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void ensure_directory(const char *path) {
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int ret = mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
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if (ret != 0 && errno != EEXIST) {
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ERR("Unable To Create Directory: %s", strerror(errno));
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}
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int is_dir = 0;
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struct stat obj = {};
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ret = stat(path, &obj);
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if (ret == 0) {
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is_dir = S_ISDIR(obj.st_mode);
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}
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if (!is_dir) {
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ERR("Not A Directory: %s", path);
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}
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} |