* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
+ * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
- * © 2009-2010 Michael Stapelberg and contributors
- *
- * See file LICENSE for license information.
- *
- * util.c: Utility functions, which can be useful everywhere.
+ * util.c: Utility functions, which can be useful everywhere within i3 (see
+ * also libi3).
*
*/
+#include "all.h"
+
#include <sys/wait.h>
#include <stdarg.h>
-#include <iconv.h>
#if defined(__OpenBSD__)
#include <sys/cdefs.h>
#endif
-
#include <fcntl.h>
+#include <pwd.h>
+#include <yajl/yajl_version.h>
+#include <libgen.h>
-#include "all.h"
-
-static iconv_t conversion_descriptor = 0;
+#define SN_API_NOT_YET_FROZEN 1
+#include <libsn/sn-launcher.h>
int min(int a, int b) {
return (a < b ? a : b);
}
/*
- * The s* functions (safe) are wrappers around malloc, strdup, …, which exits if one of
- * the called functions returns NULL, meaning that there is no more memory available
+ * exec()s an i3 utility, for example the config file migration script or
+ * i3-nagbar. This function first searches $PATH for the given utility named,
+ * then falls back to the dirname() of the i3 executable path and then falls
+ * back to the dirname() of the target of /proc/self/exe (on linux).
*
- */
-void *smalloc(size_t size) {
- void *result = malloc(size);
- exit_if_null(result, "Error: out of memory (malloc(%zd))\n", size);
- return result;
-}
-
-void *scalloc(size_t size) {
- void *result = calloc(size, 1);
- exit_if_null(result, "Error: out of memory (calloc(%zd))\n", size);
- return result;
-}
-
-void *srealloc(void *ptr, size_t size) {
- void *result = realloc(ptr, size);
- exit_if_null(result, "Error: out memory (realloc(%zd))\n", size);
- return result;
-}
-
-char *sstrdup(const char *str) {
- char *result = strdup(str);
- exit_if_null(result, "Error: out of memory (strdup())\n");
- return result;
-}
-
-/*
- * Starts the given application by passing it through a shell. We use double fork
- * to avoid zombie processes. As the started application’s parent exits (immediately),
- * the application is reparented to init (process-id 1), which correctly handles
- * childs, so we don’t have to do it :-).
+ * This function should be called after fork()ing.
*
- * The shell is determined by looking for the SHELL environment variable. If it
- * does not exist, /bin/sh is used.
+ * The first argument of the given argv vector will be overwritten with the
+ * executable name, so pass NULL.
+ *
+ * If the utility cannot be found in any of these locations, it exits with
+ * return code 2.
*
*/
-void start_application(const char *command) {
- LOG("executing: %s\n", command);
- if (fork() == 0) {
- /* Child process */
- setsid();
- if (fork() == 0) {
- /* Stores the path of the shell */
- static const char *shell = NULL;
-
- if (shell == NULL)
- if ((shell = getenv("SHELL")) == NULL)
- shell = "/bin/sh";
-
- /* This is the child */
- execl(shell, shell, "-c", command, (void*)NULL);
- /* not reached */
- }
- exit(0);
+void exec_i3_utility(char *name, char *argv[]) {
+ /* start the migration script, search PATH first */
+ char *migratepath = name;
+ argv[0] = migratepath;
+ execvp(migratepath, argv);
+
+ /* if the script is not in path, maybe the user installed to a strange
+ * location and runs the i3 binary with an absolute path. We use
+ * argv[0]’s dirname */
+ char *pathbuf = strdup(start_argv[0]);
+ char *dir = dirname(pathbuf);
+ sasprintf(&migratepath, "%s/%s", dir, name);
+ argv[0] = migratepath;
+ execvp(migratepath, argv);
+
+#if defined(__linux__)
+ /* on linux, we have one more fall-back: dirname(/proc/self/exe) */
+ char buffer[BUFSIZ];
+ if (readlink("/proc/self/exe", buffer, BUFSIZ) == -1) {
+ warn("could not read /proc/self/exe");
+ exit(1);
}
- wait(0);
+ dir = dirname(buffer);
+ sasprintf(&migratepath, "%s/%s", dir, name);
+ argv[0] = migratepath;
+ execvp(migratepath, argv);
+#endif
+
+ warn("Could not start %s", name);
+ exit(2);
}
/*
}
/*
- * Converts the given string to UCS-2 big endian for use with
- * xcb_image_text_16(). The amount of real glyphs is stored in real_strlen,
- * a buffer containing the UCS-2 encoded string (16 bit per glyph) is
- * returned. It has to be freed when done.
+ * This function resolves ~ in pathnames.
+ * It may resolve wildcards in the first part of the path, but if no match
+ * or multiple matches are found, it just returns a copy of path as given.
*
*/
-char *convert_utf8_to_ucs2(char *input, int *real_strlen) {
- size_t input_size = strlen(input) + 1;
- /* UCS-2 consumes exactly two bytes for each glyph */
- int buffer_size = input_size * 2;
-
- char *buffer = smalloc(buffer_size);
- size_t output_size = buffer_size;
- /* We need to use an additional pointer, because iconv() modifies it */
- char *output = buffer;
-
- /* We convert the input into UCS-2 big endian */
- if (conversion_descriptor == 0) {
- conversion_descriptor = iconv_open("UCS-2BE", "UTF-8");
- if (conversion_descriptor == 0) {
- fprintf(stderr, "error opening the conversion context\n");
- exit(1);
+char *resolve_tilde(const char *path) {
+ static glob_t globbuf;
+ char *head, *tail, *result;
+
+ tail = strchr(path, '/');
+ head = strndup(path, tail ? tail - path : strlen(path));
+
+ int res = glob(head, GLOB_TILDE, NULL, &globbuf);
+ free(head);
+ /* no match, or many wildcard matches are bad */
+ if (res == GLOB_NOMATCH || globbuf.gl_pathc != 1)
+ result = sstrdup(path);
+ else if (res != 0) {
+ die("glob() failed");
+ } else {
+ head = globbuf.gl_pathv[0];
+ result = scalloc(strlen(head) + (tail ? strlen(tail) : 0) + 1);
+ strncpy(result, head, strlen(head));
+ if (tail)
+ strncat(result, tail, strlen(tail));
}
- }
-
- /* Get the conversion descriptor back to original state */
- iconv(conversion_descriptor, NULL, NULL, NULL, NULL);
-
- /* Convert our text */
- int rc = iconv(conversion_descriptor, (void*)&input, &input_size, &output, &output_size);
- if (rc == (size_t)-1) {
- perror("Converting to UCS-2 failed");
- if (real_strlen != NULL)
- *real_strlen = 0;
- return NULL;
- }
+ globfree(&globbuf);
- if (real_strlen != NULL)
- *real_strlen = ((buffer_size - output_size) / 2) - 1;
+ return result;
+}
- return buffer;
+/*
+ * Checks if the given path exists by calling stat().
+ *
+ */
+bool path_exists(const char *path) {
+ struct stat buf;
+ return (stat(path, &buf) == 0);
}
/*
return result;
}
+/*
+ * Returns the name of a temporary file with the specified prefix.
+ *
+ */
+char *get_process_filename(const char *prefix) {
+ /* dir stores the directory path for this and all subsequent calls so that
+ * we only create a temporary directory once per i3 instance. */
+ static char *dir = NULL;
+ if (dir == NULL) {
+ /* Check if XDG_RUNTIME_DIR is set. If so, we use XDG_RUNTIME_DIR/i3 */
+ if ((dir = getenv("XDG_RUNTIME_DIR"))) {
+ char *tmp;
+ sasprintf(&tmp, "%s/i3", dir);
+ dir = tmp;
+ if (!path_exists(dir)) {
+ if (mkdir(dir, 0700) == -1) {
+ perror("mkdir()");
+ return NULL;
+ }
+ }
+ } else {
+ /* If not, we create a (secure) temp directory using the template
+ * /tmp/i3-<user>.XXXXXX */
+ struct passwd *pw = getpwuid(getuid());
+ const char *username = pw ? pw->pw_name : "unknown";
+ sasprintf(&dir, "/tmp/i3-%s.XXXXXX", username);
+ /* mkdtemp modifies dir */
+ if (mkdtemp(dir) == NULL) {
+ perror("mkdtemp()");
+ return NULL;
+ }
+ }
+ }
+ char *filename;
+ sasprintf(&filename, "%s/%s.%d", dir, prefix, getpid());
+ return filename;
+}
+
#define y(x, ...) yajl_gen_ ## x (gen, ##__VA_ARGS__)
#define ystr(str) yajl_gen_string(gen, (unsigned char*)str, strlen(str))
-void store_restart_layout() {
+char *store_restart_layout() {
setlocale(LC_NUMERIC, "C");
+#if YAJL_MAJOR >= 2
+ yajl_gen gen = yajl_gen_alloc(NULL);
+#else
yajl_gen gen = yajl_gen_alloc(NULL, NULL);
+#endif
dump_node(gen, croot, true);
setlocale(LC_NUMERIC, "");
const unsigned char *payload;
+#if YAJL_MAJOR >= 2
+ size_t length;
+#else
unsigned int length;
+#endif
y(get_buf, &payload, &length);
- char *globbed = resolve_tilde(config.restart_state_path);
- int fd = open(globbed, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
- free(globbed);
+ /* create a temporary file if one hasn't been specified, or just
+ * resolve the tildes in the specified path */
+ char *filename;
+ if (config.restart_state_path == NULL) {
+ filename = get_process_filename("restart-state");
+ if (!filename)
+ return NULL;
+ } else {
+ filename = resolve_tilde(config.restart_state_path);
+ }
+
+ int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (fd == -1) {
perror("open()");
- return;
+ free(filename);
+ return NULL;
}
int written = 0;
/* TODO: correct error-handling */
if (n == -1) {
perror("write()");
- return;
+ free(filename);
+ close(fd);
+ return NULL;
}
if (n == 0) {
printf("write == 0?\n");
- return;
+ free(filename);
+ close(fd);
+ return NULL;
}
written += n;
+#if YAJL_MAJOR >= 2
+ printf("written: %d of %zd\n", written, length);
+#else
printf("written: %d of %d\n", written, length);
+#endif
}
close(fd);
- printf("layout: %.*s\n", length, payload);
+ if (length > 0) {
+ printf("layout: %.*s\n", (int)length, payload);
+ }
y(free);
+
+ return filename;
}
/*
* appends -a to argument list to disable autostart
*
*/
-void i3_restart() {
- store_restart_layout();
+void i3_restart(bool forget_layout) {
+ char *restart_filename = forget_layout ? NULL : store_restart_layout();
+
+ kill_configerror_nagbar(true);
+
restore_geometry();
ipc_shutdown();
/* make sure -a is in the argument list or append it */
start_argv = append_argument(start_argv, "-a");
+ /* replace -r <file> so that the layout is restored */
+ if (restart_filename != NULL) {
+ /* create the new argv */
+ int num_args;
+ for (num_args = 0; start_argv[num_args] != NULL; num_args++);
+ char **new_argv = scalloc((num_args + 3) * sizeof(char*));
+
+ /* copy the arguments, but skip the ones we'll replace */
+ int write_index = 0;
+ bool skip_next = false;
+ for (int i = 0; i < num_args; ++i) {
+ if (skip_next)
+ skip_next = false;
+ else if (!strcmp(start_argv[i], "-r") ||
+ !strcmp(start_argv[i], "--restart"))
+ skip_next = true;
+ else
+ new_argv[write_index++] = start_argv[i];
+ }
+
+ /* add the arguments we'll replace */
+ new_argv[write_index++] = "--restart";
+ new_argv[write_index] = restart_filename;
+
+ /* swap the argvs */
+ start_argv = new_argv;
+ }
+
execvp(start_argv[0], start_argv);
/* not reached */
}
-#if 0
-
-#if defined(__OpenBSD__)
+#if defined(__OpenBSD__) || defined(__APPLE__)
/*
* Taken from FreeBSD
*
*/
void *memmem(const void *l, size_t l_len, const void *s, size_t s_len) {
- register char *cur, *last;
- const char *cl = (const char *)l;
- const char *cs = (const char *)s;
+ register char *cur, *last;
+ const char *cl = (const char *)l;
+ const char *cs = (const char *)s;
- /* we need something to compare */
- if (l_len == 0 || s_len == 0)
- return NULL;
+ /* we need something to compare */
+ if (l_len == 0 || s_len == 0)
+ return NULL;
- /* "s" must be smaller or equal to "l" */
- if (l_len < s_len)
- return NULL;
+ /* "s" must be smaller or equal to "l" */
+ if (l_len < s_len)
+ return NULL;
- /* special case where s_len == 1 */
- if (s_len == 1)
- return memchr(l, (int)*cs, l_len);
+ /* special case where s_len == 1 */
+ if (s_len == 1)
+ return memchr(l, (int)*cs, l_len);
- /* the last position where its possible to find "s" in "l" */
- last = (char *)cl + l_len - s_len;
+ /* the last position where its possible to find "s" in "l" */
+ last = (char *)cl + l_len - s_len;
- for (cur = (char *)cl; cur <= last; cur++)
- if (cur[0] == cs[0] && memcmp(cur, cs, s_len) == 0)
- return cur;
+ for (cur = (char *)cl; cur <= last; cur++)
+ if (cur[0] == cs[0] && memcmp(cur, cs, s_len) == 0)
+ return cur;
- return NULL;
+ return NULL;
}
#endif
-#endif
projects / i3 / i3 / blobdiff