git.sur5r.net Git - i3/i3/blob - src/config.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  */
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <sys/stat.h>
  14 #include <stdlib.h>
  15 #include <glob.h>
  16
  17 #include "i3.h"
  18 #include "util.h"
  19 #include "config.h"
  20 #include "xcb.h"
  21
  22 Config config;
  23
  24 /*
  25  * This function resolves ~ in pathnames.
  26  *
  27  */
  28 static char *glob_path(const char *path) {
  29         static glob_t globbuf;
  30         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
  31                 die("glob() failed");
  32         char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
  33         globfree(&globbuf);
  34         return result;
  35 }
  36
  37 /*
  38  * This function does a very simple replacement of each instance of key with value.
  39  *
  40  */
  41 static void replace_variable(char *buffer, const char *key, const char *value) {
  42         char *pos;
  43         /* To prevent endless recursions when the user makes an error configuring,
  44          * we stop after 100 replacements. That should be vastly more than enough. */
  45         int c = 0;
  46         LOG("Replacing %s with %s\n", key, value);
  47         while ((pos = strcasestr(buffer, key)) != NULL && c++ < 100) {
  48                 LOG("replacing variable %s in \"%s\" with \"%s\"\n", key, buffer, value);
  49                 char *rest = pos + strlen(key);
  50                 *pos = '\0';
  51                 char *replaced;
  52                 asprintf(&replaced, "%s%s%s", buffer, value, rest);
  53                 /* Hm, this is a bit ugly, but sizeof(buffer) = 4, as it’s just a pointer.
  54                  * So we need to hard-code the dimensions here. */
  55                 strncpy(buffer, replaced, 1026);
  56                 free(replaced);
  57         }
  58 }
  59
  60 /*
  61  * Reads the configuration from ~/.i3/config or /etc/i3/config if not found.
  62  *
  63  * If you specify override_configpath, only this path is used to look for a
  64  * configuration file.
  65  *
  66  */
  67 void load_configuration(xcb_connection_t *conn, const char *override_configpath) {
  68         SLIST_HEAD(variables_head, Variable) variables;
  69
  70 #define OPTION_STRING(name) \
  71         if (strcasecmp(key, #name) == 0) { \
  72                 config.name = sstrdup(value); \
  73                 continue; \
  74         }
  75
  76 #define REQUIRED_OPTION(name) \
  77         if (config.name == NULL) \
  78                 die("You did not specify required configuration option " #name "\n");
  79
  80 #define OPTION_COLORTRIPLE(opt, name) \
  81         if (strcasecmp(key, opt) == 0) { \
  82                 char border[8], background[8], text[8]; \
  83                 memset(border, 0, sizeof(border)); \
  84                 memset(background, 0, sizeof(background)); \
  85                 memset(text, 0, sizeof(text)); \
  86                 border[0] = background[0] = text[0] = '#'; \
  87                 if (sscanf(value, "#%06[0-9a-fA-F] #%06[0-9a-fA-F] #%06[0-9a-fA-F]", \
  88                     border + 1, background + 1, text + 1) != 3 || \
  89                     strlen(border) != 7 || \
  90                     strlen(background) != 7 || \
  91                     strlen(text) != 7) \
  92                         die("invalid color code line: %s\n", value); \
  93                 config.name.border = get_colorpixel(conn, border); \
  94                 config.name.background = get_colorpixel(conn, background); \
  95                 config.name.text = get_colorpixel(conn, text); \
  96                 continue; \
  97         }
  98
  99         /* Clear the old config or initialize the data structure */
 100         memset(&config, 0, sizeof(config));
 101
 102         SLIST_INIT(&variables);
 103
 104         /* Initialize default colors */
 105         config.client.focused.border = get_colorpixel(conn, "#4c7899");
 106         config.client.focused.background = get_colorpixel(conn, "#285577");
 107         config.client.focused.text = get_colorpixel(conn, "#ffffff");
 108
 109         config.client.focused_inactive.border = get_colorpixel(conn, "#4c7899");
 110         config.client.focused_inactive.background = get_colorpixel(conn, "#555555");
 111         config.client.focused_inactive.text = get_colorpixel(conn, "#ffffff");
 112
 113         config.client.unfocused.border = get_colorpixel(conn, "#333333");
 114         config.client.unfocused.background = get_colorpixel(conn, "#222222");
 115         config.client.unfocused.text = get_colorpixel(conn, "#888888");
 116
 117         config.bar.focused.border = get_colorpixel(conn, "#4c7899");
 118         config.bar.focused.background = get_colorpixel(conn, "#285577");
 119         config.bar.focused.text = get_colorpixel(conn, "#ffffff");
 120
 121         config.bar.unfocused.border = get_colorpixel(conn, "#333333");
 122         config.bar.unfocused.background = get_colorpixel(conn, "#222222");
 123         config.bar.unfocused.text = get_colorpixel(conn, "#888888");
 124
 125         FILE *handle;
 126         if (override_configpath != NULL) {
 127                 if ((handle = fopen(override_configpath, "r")) == NULL)
 128                         die("Could not open configfile \"%s\".\n", override_configpath);
 129         } else {
 130                 /* We first check for ~/.i3/config, then for /etc/i3/config */
 131                 char *globbed = glob_path("~/.i3/config");
 132                 if ((handle = fopen(globbed, "r")) == NULL)
 133                         if ((handle = fopen("/etc/i3/config", "r")) == NULL)
 134                                 die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
 135                 free(globbed);
 136         }
 137         char key[512], value[512], buffer[1026];
 138
 139         while (!feof(handle)) {
 140                 if (fgets(buffer, 1024, handle) == NULL) {
 141                         /* fgets returns NULL on EOF and on error, so see which one it is. */
 142                         if (feof(handle))
 143                                 break;
 144                         die("Could not read configuration file\n");
 145                 }
 146
 147                 if (config.terminal != NULL)
 148                         replace_variable(buffer, "$terminal", config.terminal);
 149
 150                 /* Replace all custom variables */
 151                 struct Variable *current;
 152                 SLIST_FOREACH(current, &variables, variables)
 153                         replace_variable(buffer, current->key, current->value);
 154
 155                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
 156                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
 157                     key[0] == '#' || strlen(key) < 3)
 158                         continue;
 159
 160                 OPTION_STRING(terminal);
 161                 OPTION_STRING(font);
 162
 163                 /* Colors */
 164                 OPTION_COLORTRIPLE("client.focused", client.focused);
 165                 OPTION_COLORTRIPLE("client.focused_inactive", client.focused_inactive);
 166                 OPTION_COLORTRIPLE("client.unfocused", client.unfocused);
 167                 OPTION_COLORTRIPLE("bar.focused", bar.focused);
 168                 OPTION_COLORTRIPLE("bar.unfocused", bar.unfocused);
 169
 170                 /* exec-lines (autostart) */
 171                 if (strcasecmp(key, "exec") == 0) {
 172                         struct Autostart *new = smalloc(sizeof(struct Autostart));
 173                         new->command = sstrdup(value);
 174                         TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
 175                         continue;
 176                 }
 177
 178                 /* key bindings */
 179                 if (strcasecmp(key, "bind") == 0) {
 180                         #define CHECK_MODIFIER(name) \
 181                                 if (strncasecmp(walk, #name, strlen(#name)) == 0) { \
 182                                         modifiers |= BIND_##name; \
 183                                         walk += strlen(#name) + 1; \
 184                                         continue; \
 185                                 }
 186                         char *walk = value, *rest;
 187                         uint32_t modifiers = 0;
 188
 189                         while (*walk != '\0') {
 190                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 191                                 CHECK_MODIFIER(SHIFT);
 192                                 CHECK_MODIFIER(CONTROL);
 193                                 CHECK_MODIFIER(MODE_SWITCH);
 194                                 CHECK_MODIFIER(MOD1);
 195                                 CHECK_MODIFIER(MOD2);
 196                                 CHECK_MODIFIER(MOD3);
 197                                 CHECK_MODIFIER(MOD4);
 198                                 CHECK_MODIFIER(MOD5);
 199
 200                                 /* No modifier found? Then we’re done with this step */
 201                                 break;
 202                         }
 203
 204                         /* Now check for the keycode */
 205                         int keycode = strtol(walk, &rest, 10);
 206                         if (!rest || *rest != ' ')
 207                                 die("Invalid binding\n");
 208                         rest++;
 209                         LOG("keycode = %d, modifiers = %d, command = *%s*\n", keycode, modifiers, rest);
 210                         Binding *new = smalloc(sizeof(Binding));
 211                         new->keycode = keycode;
 212                         new->mods = modifiers;
 213                         new->command = sstrdup(rest);
 214                         TAILQ_INSERT_TAIL(&bindings, new, bindings);
 215                         continue;
 216                 }
 217
 218                 if (strcasecmp(key, "floating_modifier") == 0) {
 219                         char *walk = value;
 220                         uint32_t modifiers = 0;
 221
 222                         while (*walk != '\0') {
 223                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 224                                 CHECK_MODIFIER(SHIFT);
 225                                 CHECK_MODIFIER(CONTROL);
 226                                 CHECK_MODIFIER(MODE_SWITCH);
 227                                 CHECK_MODIFIER(MOD1);
 228                                 CHECK_MODIFIER(MOD2);
 229                                 CHECK_MODIFIER(MOD3);
 230                                 CHECK_MODIFIER(MOD4);
 231                                 CHECK_MODIFIER(MOD5);
 232
 233                                 /* No modifier found? Then we’re done with this step */
 234                                 break;
 235                         }
 236
 237                         LOG("Floating modifiers = %d\n", modifiers);
 238                         config.floating_modifier = modifiers;
 239                         continue;
 240                 }
 241
 242                 /* assign window class[/window title] → workspace */
 243                 if (strcasecmp(key, "assign") == 0) {
 244                         LOG("assign: \"%s\"\n", value);
 245                         char *class_title = sstrdup(value);
 246                         char *target;
 247
 248                         /* If the window class/title is quoted we skip quotes */
 249                         if (class_title[0] == '"') {
 250                                 class_title++;
 251                                 char *end = strchr(class_title, '"');
 252                                 if (end == NULL)
 253                                         die("Malformed assignment, couldn't find terminating quote\n");
 254                                 *end = '\0';
 255                         } else {
 256                                 /* If it is not quoted, we terminate it at the first space */
 257                                 char *end = strchr(class_title, ' ');
 258                                 if (end == NULL)
 259                                         die("Malformed assignment, couldn't find terminating space\n");
 260                                 *end = '\0';
 261                         }
 262
 263                         /* Strip trailing whitespace */
 264                         while (strlen(value) > 0 && value[strlen(value)-1] == ' ')
 265                                 value[strlen(value)-1] = '\0';
 266
 267                         /* The target is the last argument separated by a space */
 268                         if ((target = strrchr(value, ' ')) == NULL)
 269                                 die("Malformed assignment, couldn't find target\n");
 270                         target++;
 271
 272                         if (*target != '~' && (atoi(target) < 1 || atoi(target) > 10))
 273                                 die("Malformed assignment, invalid workspace number\n");
 274
 275                         LOG("assignment parsed: \"%s\" to \"%s\"\n", class_title, target);
 276
 277                         struct Assignment *new = scalloc(sizeof(struct Assignment));
 278                         new->windowclass_title = class_title;
 279                         if (*target == '~')
 280                                 new->floating = true;
 281                         else new->workspace = atoi(target);
 282                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 283                         continue;
 284                 }
 285
 286                 /* set a custom variable */
 287                 if (strcasecmp(key, "set") == 0) {
 288                         if (value[0] != '$')
 289                                 die("Malformed variable assignment, name has to start with $\n");
 290
 291                         /* get key/value for this variable */
 292                         char *v_key = value, *v_value;
 293                         if ((v_value = strstr(value, " ")) == NULL)
 294                                 die("Malformed variable assignment, need a value\n");
 295
 296                         *(v_value++) = '\0';
 297
 298                         struct Variable *new = scalloc(sizeof(struct Variable));
 299                         new->key = sstrdup(v_key);
 300                         new->value = sstrdup(v_value);
 301                         SLIST_INSERT_HEAD(&variables, new, variables);
 302                         LOG("Got new variable %s = %s\n", v_key, v_value);
 303                         continue;
 304                 }
 305
 306                 die("Unknown configfile option: %s\n", key);
 307         }
 308         fclose(handle);
 309
 310         REQUIRED_OPTION(terminal);
 311         REQUIRED_OPTION(font);
 312
 313
 314         while (!SLIST_EMPTY(&variables)) {
 315                 struct Variable *v = SLIST_FIRST(&variables);
 316                 SLIST_REMOVE_HEAD(&variables, variables);
 317                 free(v->key);
 318                 free(v->value);
 319                 free(v);
 320         }
 321
 322         return;
 323 }