initial commit

src/utils.c

@@ -0,0 +1,245 @@
+#include "configator.h"
+#include "dragonfail.h"
+
+#include "inputs.h"
+#include "config.h"
+#include "utils.h"
+
+#include <dirent.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#if defined(__DragonFly__) || defined(__FreeBSD__)
+	#include <sys/consio.h>
+#else // linux
+	#include <linux/vt.h>
+#endif
+
+void desktop_crawl(
+	struct desktop* target,
+	char* sessions,
+	enum display_server server)
+{
+	DIR* dir;
+	struct dirent* dir_info;
+	int ok;
+
+	ok = access(sessions, F_OK);
+
+	if (ok == -1)
+	{
+		dgn_throw(DGN_XSESSIONS_DIR);
+		return;
+	}
+
+	dir = opendir(sessions);
+
+	if (dir == NULL)
+	{
+		dgn_throw(DGN_XSESSIONS_OPEN);
+		return;
+	}
+
+	char* name = NULL;
+	char* exec = NULL;
+
+	struct configator_param map_desktop[] =
+	{
+		{"Exec", &exec, config_handle_str},
+		{"Name", &name, config_handle_str},
+	};
+
+	struct configator_param* map[] =
+	{
+		NULL,
+		map_desktop,
+	};
+
+	struct configator_param sections[] =	
+	{
+		{"Desktop Entry", NULL, NULL},
+	};
+
+	uint16_t map_len[] = {0, 2};
+	uint16_t sections_len = 1;
+
+	struct configator desktop_config;
+	desktop_config.map = map;
+	desktop_config.map_len = map_len;
+	desktop_config.sections = sections;
+	desktop_config.sections_len = sections_len;
+
+#if defined(NAME_MAX)
+	char path[NAME_MAX];
+#elif defined(_POSIX_PATH_MAX)
+	char path[_POSIX_PATH_MAX];
+#else
+	char path[1024];
+#endif
+
+	dir_info = readdir(dir);
+
+	while (dir_info != NULL)
+	{
+		if ((dir_info->d_name)[0] == '.')
+		{
+			dir_info = readdir(dir);
+			continue;
+		}
+
+		snprintf(path, (sizeof (path)) - 1, "%s/", sessions);
+		strncat(path, dir_info->d_name, (sizeof (path)) - 1);
+		configator(&desktop_config, path);
+
+		if ((name != NULL) && (exec != NULL))
+		{
+			input_desktop_add(target, name, exec, server);
+		}
+
+		name = NULL;
+		exec = NULL;
+		dir_info = readdir(dir);
+	}
+
+	closedir(dir);
+}
+
+void desktop_load(struct desktop* target)
+{
+	desktop_crawl(target, config.waylandsessions, DS_WAYLAND);
+	desktop_crawl(target, config.xsessions, DS_XORG);
+}
+
+static char* hostname_backup = NULL;
+
+void hostname(char** out)
+{
+	if (hostname_backup != NULL)
+	{
+		*out = hostname_backup;
+		return;
+	}
+
+	int maxlen = sysconf(_SC_HOST_NAME_MAX);
+
+	if (maxlen < 0)
+	{
+		maxlen = _POSIX_HOST_NAME_MAX;
+	}
+
+	hostname_backup = malloc(maxlen + 1);
+
+	if (hostname_backup == NULL)
+	{
+		dgn_throw(DGN_ALLOC);
+		return;
+	}
+
+	if (gethostname(hostname_backup, maxlen) < 0)
+	{
+		dgn_throw(DGN_HOSTNAME);
+		return;
+	}
+
+	hostname_backup[maxlen] = '\0';
+	*out = hostname_backup;
+}
+
+void free_hostname()
+{
+	free(hostname_backup);
+}
+
+void switch_tty(struct term_buf* buf)
+{
+	FILE* console = fopen(config.console_dev, "w");
+
+	if (console == NULL)
+	{
+		buf->info_line = lang.err_console_dev;
+		return;
+	}
+
+	int fd = fileno(console);
+
+	ioctl(fd, VT_ACTIVATE, config.tty);
+	ioctl(fd, VT_WAITACTIVE, config.tty);
+
+	fclose(console);
+}
+
+void save(struct desktop* desktop, struct text* login)
+{
+	if (config.save)
+	{
+		FILE* fp = fopen(config.save_file, "wb+");
+
+		if (fp != NULL)
+		{
+			fprintf(fp, "%s\n%d", login->text, desktop->cur);
+			fclose(fp);
+		}
+	}
+}
+
+void load(struct desktop* desktop, struct text* login)
+{
+	if (!config.load)
+	{
+		return;
+	}
+
+	FILE* fp = fopen(config.save_file, "rb");
+
+	if (fp == NULL)
+	{
+		return;
+	}
+
+	char* line = malloc(config.max_login_len + 1);
+
+	if (line == NULL)
+	{
+		fclose(fp);
+		return;
+	}
+
+	if (fgets(line, config.max_login_len + 1, fp))
+	{
+		int len = strlen(line);
+		strncpy(login->text, line, login->len);
+
+		if (len == 0)
+		{
+			login->end = login->text;
+		}
+		else
+		{
+			login->end = login->text + len - 1;
+			login->text[len - 1] = '\0';
+		}
+	}
+	else
+	{
+		fclose(fp);
+		free(line);
+		return;
+	}
+
+	if (fgets(line, config.max_login_len + 1, fp))
+	{
+		int saved_cur = abs(atoi(line));
+
+		if (saved_cur < desktop->len)
+		{
+			desktop->cur = saved_cur;
+		}
+	}
+
+	fclose(fp);
+	free(line);
+}