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
  21 Config config;
  22
  23 /*
  24  * This function resolves ~ in pathnames.
  25  *
  26  */
  27 static char *glob_path(const char *path) {
  28         static glob_t globbuf;
  29         if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
  30                 die("glob() failed");
  31         char *result = sstrdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
  32         globfree(&globbuf);
  33         return result;
  34 }
  35
  36
  37 /*
  38  * Reads the configuration from ~/.i3/config or /etc/i3/config if not found.
  39  *
  40  * If you specify override_configpath, only this path is used to look for a
  41  * configuration file.
  42  *
  43  */
  44 void load_configuration(const char *override_configpath) {
  45 #define OPTION_STRING(name) \
  46         if (strcasecmp(key, #name) == 0) { \
  47                 config.name = sstrdup(value); \
  48                 continue; \
  49         }
  50
  51 #define REQUIRED_OPTION(name) \
  52         if (config.name == NULL) \
  53                 die("You did not specify required configuration option " #name "\n");
  54
  55         /* Clear the old config or initialize the data structure */
  56         memset(&config, 0, sizeof(config));
  57
  58         FILE *handle;
  59         if (override_configpath != NULL) {
  60                 if ((handle = fopen(override_configpath, "r")) == NULL)
  61                         die("Could not open configfile \"%s\".\n", override_configpath);
  62         } else {
  63                 /* We first check for ~/.i3/config, then for /etc/i3/config */
  64                 char *globbed = glob_path("~/.i3/config");
  65                 if ((handle = fopen(globbed, "r")) == NULL)
  66                         if ((handle = fopen("/etc/i3/config", "r")) == NULL)
  67                                 die("Neither \"%s\" nor /etc/i3/config could be opened\n", globbed);
  68                 free(globbed);
  69         }
  70         char key[512], value[512], buffer[1026];
  71
  72         while (!feof(handle)) {
  73                 if (fgets(buffer, 1024, handle) == NULL) {
  74                         /* fgets returns NULL on EOF and on error, so see which one it is. */
  75                         if (feof(handle))
  76                                 break;
  77                         die("Could not read configuration file\n");
  78                 }
  79
  80                 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
  81                 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
  82                     key[0] == '#' || strlen(key) < 3)
  83                         continue;
  84
  85                 OPTION_STRING(terminal);
  86                 OPTION_STRING(font);
  87
  88                 /* exec-lines (autostart) */
  89                 if (strcasecmp(key, "exec") == 0) {
  90                         struct Autostart *new = smalloc(sizeof(struct Autostart));
  91                         new->command = sstrdup(value);
  92                         TAILQ_INSERT_TAIL(&autostarts, new, autostarts);
  93                         continue;
  94                 }
  95
  96                 /* key bindings */
  97                 if (strcasecmp(key, "bind") == 0) {
  98                         #define CHECK_MODIFIER(name) \
  99                                 if (strncasecmp(walk, #name, strlen(#name)) == 0) { \
 100                                         modifiers |= BIND_##name; \
 101                                         walk += strlen(#name) + 1; \
 102                                         continue; \
 103                                 }
 104                         char *walk = value, *rest;
 105                         uint32_t modifiers = 0;
 106
 107                         while (*walk != '\0') {
 108                                 /* Need to check for Mod1-5, Ctrl, Shift, Mode_switch */
 109                                 CHECK_MODIFIER(SHIFT);
 110                                 CHECK_MODIFIER(CONTROL);
 111                                 CHECK_MODIFIER(MODE_SWITCH);
 112                                 CHECK_MODIFIER(MOD1);
 113                                 CHECK_MODIFIER(MOD2);
 114                                 CHECK_MODIFIER(MOD3);
 115                                 CHECK_MODIFIER(MOD4);
 116                                 CHECK_MODIFIER(MOD5);
 117
 118                                 /* No modifier found? Then we’re done with this step */
 119                                 break;
 120                         }
 121
 122                         /* Now check for the keycode */
 123                         int keycode = strtol(walk, &rest, 10);
 124                         if (!rest || *rest != ' ')
 125                                 die("Invalid binding\n");
 126                         rest++;
 127                         LOG("keycode = %d, modifiers = %d, command = *%s*\n", keycode, modifiers, rest);
 128                         Binding *new = smalloc(sizeof(Binding));
 129                         new->keycode = keycode;
 130                         new->mods = modifiers;
 131                         new->command = sstrdup(rest);
 132                         TAILQ_INSERT_TAIL(&bindings, new, bindings);
 133                         continue;
 134                 }
 135
 136                 /* assign window class[/window title] → workspace */
 137                 if (strcasecmp(key, "assign") == 0) {
 138                         LOG("assign: \"%s\"\n", value);
 139                         char *class_title = sstrdup(value);
 140                         char *target;
 141
 142                         /* If the window class/title is quoted we skip quotes */
 143                         if (class_title[0] == '"') {
 144                                 class_title++;
 145                                 char *end = strchr(class_title, '"');
 146                                 if (end == NULL)
 147                                         die("Malformatted assignment, couldn't find finishing quote\n");
 148                                 *end = '\0';
 149                         } else {
 150                                 /* If it is not quoted, we terminate it at the first space */
 151                                 char *end = strchr(class_title, ' ');
 152                                 if (end == NULL)
 153                                         die("Malformed assignment, couldn't find terminating space\n");
 154                                 *end = '\0';
 155                         }
 156
 157                         /* The target is the last argument separated by a space */
 158                         if ((target = strrchr(value, ' ')) == NULL)
 159                                 die("Malformed assignment, couldn't find target\n");
 160                         target++;
 161
 162                         if (atoi(target) < 1 || atoi(target) > 10)
 163                                 die("Malformed assignment, invalid workspace number\n");
 164
 165                         LOG("assignment parsed: \"%s\" to \"%s\"\n", class_title, target);
 166
 167                         struct Assignment *new = smalloc(sizeof(struct Assignment));
 168                         new->windowclass_title = class_title;
 169                         new->workspace = atoi(target);
 170                         TAILQ_INSERT_TAIL(&assignments, new, assignments);
 171                         continue;
 172                 }
 173
 174                 fprintf(stderr, "Unknown configfile option: %s\n", key);
 175                 exit(1);
 176         }
 177         fclose(handle);
 178
 179         REQUIRED_OPTION(terminal);
 180         REQUIRED_OPTION(font);
 181
 182         return;
 183 }