2 #define I3__FILE__ "config_parser.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
9 * config_parser.c: hand-written parser to parse configuration directives.
11 * See also src/commands_parser.c for rationale on why we use a custom parser.
13 * This parser works VERY MUCH like src/commands_parser.c, so read that first.
14 * The differences are:
16 * 1. config_parser supports the 'number' token type (in addition to 'word' and
17 * 'string'). Numbers are referred to using &num (like $str).
19 * 2. Criteria are not executed immediately, they are just stored.
21 * 3. config_parser recognizes \n and \r as 'end' token, while commands_parser
24 * 4. config_parser skips the current line on invalid inputs and follows the
25 * nearest <error> token.
34 #include <sys/types.h>
41 // Macros to make the YAJL API a bit easier to use.
42 #define y(x, ...) yajl_gen_##x(command_output.json_gen, ##__VA_ARGS__)
43 #define ystr(str) yajl_gen_string(command_output.json_gen, (unsigned char *)str, strlen(str))
46 pid_t config_error_nagbar_pid = -1;
47 static struct context *context;
50 /*******************************************************************************
51 * The data structures used for parsing. Essentially the current state and a
52 * list of tokens for that state.
54 * The GENERATED_* files are generated by generate-commands-parser.pl with the
55 * input parser-specs/configs.spec.
56 ******************************************************************************/
58 #include "GENERATED_config_enums.h"
60 typedef struct token {
63 /* This might be __CALL */
64 cmdp_state next_state;
66 uint16_t call_identifier;
70 typedef struct tokenptr {
75 #include "GENERATED_config_tokens.h"
77 /*******************************************************************************
78 * The (small) stack where identified literals are stored during the parsing
79 * of a single command (like $workspace).
80 ******************************************************************************/
83 /* Just a pointer, not dynamically allocated. */
84 const char *identifier;
95 /* 10 entries should be enough for everybody. */
96 static struct stack_entry stack[10];
99 * Pushes a string (identified by 'identifier') on the stack. We simply use a
100 * single array, since the number of entries we have to store is very small.
103 static void push_string(const char *identifier, const char *str) {
104 for (int c = 0; c < 10; c++) {
105 if (stack[c].identifier != NULL &&
106 strcmp(stack[c].identifier, identifier) != 0)
108 if (stack[c].identifier == NULL) {
109 /* Found a free slot, let’s store it here. */
110 stack[c].identifier = identifier;
111 stack[c].val.str = sstrdup(str);
112 stack[c].type = STACK_STR;
114 /* Append the value. */
115 char *prev = stack[c].val.str;
116 sasprintf(&(stack[c].val.str), "%s,%s", prev, str);
122 /* When we arrive here, the stack is full. This should not happen and
123 * means there’s either a bug in this parser or the specification
124 * contains a command with more than 10 identified tokens. */
125 fprintf(stderr, "BUG: commands_parser stack full. This means either a bug "
126 "in the code, or a new command which contains more than "
127 "10 identified tokens.\n");
131 static void push_long(const char *identifier, long num) {
132 for (int c = 0; c < 10; c++) {
133 if (stack[c].identifier != NULL)
135 /* Found a free slot, let’s store it here. */
136 stack[c].identifier = identifier;
137 stack[c].val.num = num;
138 stack[c].type = STACK_LONG;
142 /* When we arrive here, the stack is full. This should not happen and
143 * means there’s either a bug in this parser or the specification
144 * contains a command with more than 10 identified tokens. */
145 fprintf(stderr, "BUG: commands_parser stack full. This means either a bug "
146 "in the code, or a new command which contains more than "
147 "10 identified tokens.\n");
151 static const char *get_string(const char *identifier) {
152 for (int c = 0; c < 10; c++) {
153 if (stack[c].identifier == NULL)
155 if (strcmp(identifier, stack[c].identifier) == 0)
156 return stack[c].val.str;
161 static long get_long(const char *identifier) {
162 for (int c = 0; c < 10; c++) {
163 if (stack[c].identifier == NULL)
165 if (strcmp(identifier, stack[c].identifier) == 0)
166 return stack[c].val.num;
171 static void clear_stack(void) {
172 for (int c = 0; c < 10; c++) {
173 if (stack[c].type == STACK_STR && stack[c].val.str != NULL)
174 free(stack[c].val.str);
175 stack[c].identifier = NULL;
176 stack[c].val.str = NULL;
177 stack[c].val.num = 0;
181 // TODO: remove this if it turns out we don’t need it for testing.
183 /*******************************************************************************
184 * A dynamically growing linked list which holds the criteria for the current
186 ******************************************************************************/
188 typedef struct criterion {
192 TAILQ_ENTRY(criterion) criteria;
195 static TAILQ_HEAD(criteria_head, criterion) criteria =
196 TAILQ_HEAD_INITIALIZER(criteria);
199 * Stores the given type/value in the list of criteria.
200 * Accepts a pointer as first argument, since it is 'call'ed by the parser.
203 static void push_criterion(void *unused_criteria, const char *type,
205 struct criterion *criterion = malloc(sizeof(struct criterion));
206 criterion->type = strdup(type);
207 criterion->value = strdup(value);
208 TAILQ_INSERT_TAIL(&criteria, criterion, criteria);
212 * Clears the criteria linked list.
213 * Accepts a pointer as first argument, since it is 'call'ed by the parser.
216 static void clear_criteria(void *unused_criteria) {
217 struct criterion *criterion;
218 while (!TAILQ_EMPTY(&criteria)) {
219 criterion = TAILQ_FIRST(&criteria);
220 free(criterion->type);
221 free(criterion->value);
222 TAILQ_REMOVE(&criteria, criterion, criteria);
228 /*******************************************************************************
230 ******************************************************************************/
232 static cmdp_state state;
233 static Match current_match;
234 static struct ConfigResultIR subcommand_output;
235 static struct ConfigResultIR command_output;
237 /* A list which contains the states that lead to the current state, e.g.
238 * INITIAL, WORKSPACE_LAYOUT.
239 * When jumping back to INITIAL, statelist_idx will simply be set to 1
240 * (likewise for other states, e.g. MODE or BAR).
241 * This list is used to process the nearest error token. */
242 static cmdp_state statelist[10] = {INITIAL};
243 /* NB: statelist_idx points to where the next entry will be inserted */
244 static int statelist_idx = 1;
246 #include "GENERATED_config_call.h"
248 static void next_state(const cmdp_token *token) {
249 cmdp_state _next_state = token->next_state;
251 //printf("token = name %s identifier %s\n", token->name, token->identifier);
252 //printf("next_state = %d\n", token->next_state);
253 if (token->next_state == __CALL) {
254 subcommand_output.json_gen = command_output.json_gen;
255 GENERATED_call(token->extra.call_identifier, &subcommand_output);
256 _next_state = subcommand_output.next_state;
261 if (state == INITIAL) {
265 /* See if we are jumping back to a state in which we were in previously
266 * (statelist contains INITIAL) and just move statelist_idx accordingly. */
267 for (int i = 0; i < statelist_idx; i++) {
268 if (statelist[i] != _next_state)
270 statelist_idx = i + 1;
274 /* Otherwise, the state is new and we add it to the list */
275 statelist[statelist_idx++] = _next_state;
279 * Returns a pointer to the start of the line (one byte after the previous \r,
280 * \n) or the start of the input, if this is the first line.
283 static const char *start_of_line(const char *walk, const char *beginning) {
284 while (*walk != '\n' && *walk != '\r' && walk >= beginning) {
292 * Copies the line and terminates it at the next \n, if any.
294 * The caller has to free() the result.
297 static char *single_line(const char *start) {
298 char *result = sstrdup(start);
299 char *end = strchr(result, '\n');
305 struct ConfigResultIR *parse_config(const char *input, struct context *context) {
306 /* Dump the entire config file into the debug log. We cannot just use
307 * DLOG("%s", input); because one log message must not exceed 4 KiB. */
308 const char *dumpwalk = input;
310 while (*dumpwalk != '\0') {
311 char *next_nl = strchr(dumpwalk, '\n');
312 if (next_nl != NULL) {
313 DLOG("CONFIG(line %3d): %.*s\n", linecnt, (int)(next_nl - dumpwalk), dumpwalk);
314 dumpwalk = next_nl + 1;
316 DLOG("CONFIG(line %3d): %s\n", linecnt, dumpwalk);
324 /* A YAJL JSON generator used for formatting replies. */
325 command_output.json_gen = yajl_gen_alloc(NULL);
329 const char *walk = input;
330 const size_t len = strlen(input);
332 const cmdp_token *token;
336 // TODO: make this testable
338 cfg_criteria_init(¤t_match, &subcommand_output, INITIAL);
341 /* The "<=" operator is intentional: We also handle the terminating 0-byte
342 * explicitly by looking for an 'end' token. */
343 while ((size_t)(walk - input) <= len) {
344 /* Skip whitespace before every token, newlines are relevant since they
345 * separate configuration directives. */
346 while ((*walk == ' ' || *walk == '\t') && *walk != '\0')
349 //printf("remaining input: %s\n", walk);
351 cmdp_token_ptr *ptr = &(tokens[state]);
352 token_handled = false;
353 for (c = 0; c < ptr->n; c++) {
354 token = &(ptr->array[c]);
357 if (token->name[0] == '\'') {
358 if (strncasecmp(walk, token->name + 1, strlen(token->name) - 1) == 0) {
359 if (token->identifier != NULL)
360 push_string(token->identifier, token->name + 1);
361 walk += strlen(token->name) - 1;
363 token_handled = true;
369 if (strcmp(token->name, "number") == 0) {
370 /* Handle numbers. We only accept decimal numbers for now. */
373 long int num = strtol(walk, &end, 10);
374 if ((errno == ERANGE && (num == LONG_MIN || num == LONG_MAX)) ||
375 (errno != 0 && num == 0))
378 /* No valid numbers found */
382 if (token->identifier != NULL)
383 push_long(token->identifier, num);
385 /* Set walk to the first non-number character */
388 token_handled = true;
392 if (strcmp(token->name, "string") == 0 ||
393 strcmp(token->name, "word") == 0) {
394 const char *beginning = walk;
395 /* Handle quoted strings (or words). */
399 while (*walk != '\0' && (*walk != '"' || *(walk - 1) == '\\'))
402 if (token->name[0] == 's') {
403 while (*walk != '\0' && *walk != '\r' && *walk != '\n')
406 /* For a word, the delimiters are white space (' ' or
407 * '\t'), closing square bracket (]), comma (,) and
409 while (*walk != ' ' && *walk != '\t' &&
410 *walk != ']' && *walk != ',' &&
411 *walk != ';' && *walk != '\r' &&
412 *walk != '\n' && *walk != '\0')
416 if (walk != beginning) {
417 char *str = scalloc(walk - beginning + 1);
418 /* We copy manually to handle escaping of characters. */
420 for (inpos = 0, outpos = 0;
421 inpos < (walk - beginning);
423 /* We only handle escaped double quotes to not break
424 * backwards compatibility with people using \w in
425 * regular expressions etc. */
426 if (beginning[inpos] == '\\' && beginning[inpos + 1] == '"')
428 str[outpos] = beginning[inpos];
430 if (token->identifier)
431 push_string(token->identifier, str);
433 /* If we are at the end of a quoted string, skip the ending
438 token_handled = true;
443 if (strcmp(token->name, "line") == 0) {
444 while (*walk != '\0' && *walk != '\n' && *walk != '\r')
447 token_handled = true;
453 if (strcmp(token->name, "end") == 0) {
454 //printf("checking for end: *%s*\n", walk);
455 if (*walk == '\0' || *walk == '\n' || *walk == '\r') {
457 token_handled = true;
458 /* To make sure we start with an appropriate matching
459 * datastructure for commands which do *not* specify any
460 * criteria, we re-initialize the criteria system after
462 // TODO: make this testable
464 cfg_criteria_init(¤t_match, &subcommand_output, INITIAL);
473 if (!token_handled) {
474 /* Figure out how much memory we will need to fill in the names of
475 * all tokens afterwards. */
477 for (c = 0; c < ptr->n; c++)
478 tokenlen += strlen(ptr->array[c].name) + strlen("'', ");
480 /* Build up a decent error message. We include the problem, the
481 * full input, and underline the position where the parser
484 char *possible_tokens = smalloc(tokenlen + 1);
485 char *tokenwalk = possible_tokens;
486 for (c = 0; c < ptr->n; c++) {
487 token = &(ptr->array[c]);
488 if (token->name[0] == '\'') {
489 /* A literal is copied to the error message enclosed with
492 strcpy(tokenwalk, token->name + 1);
493 tokenwalk += strlen(token->name + 1);
496 /* Skip error tokens in error messages, they are used
497 * internally only and might confuse users. */
498 if (strcmp(token->name, "error") == 0)
500 /* Any other token is copied to the error message enclosed
501 * with angle brackets. */
503 strcpy(tokenwalk, token->name);
504 tokenwalk += strlen(token->name);
507 if (c < (ptr->n - 1)) {
513 sasprintf(&errormessage, "Expected one of these tokens: %s",
515 free(possible_tokens);
517 /* Go back to the beginning of the line */
518 const char *error_line = start_of_line(walk, input);
520 /* Contains the same amount of characters as 'input' has, but with
521 * the unparseable part highlighted using ^ characters. */
522 char *position = scalloc(strlen(error_line) + 1);
523 const char *copywalk;
524 for (copywalk = error_line;
525 *copywalk != '\n' && *copywalk != '\r' && *copywalk != '\0';
527 position[(copywalk - error_line)] = (copywalk >= walk ? '^' : (*copywalk == '\t' ? '\t' : ' '));
528 position[(copywalk - error_line)] = '\0';
530 ELOG("CONFIG: %s\n", errormessage);
531 ELOG("CONFIG: (in file %s)\n", context->filename);
532 char *error_copy = single_line(error_line);
534 /* Print context lines *before* the error, if any. */
536 const char *context_p1_start = start_of_line(error_line - 2, input);
537 char *context_p1_line = single_line(context_p1_start);
539 const char *context_p2_start = start_of_line(context_p1_start - 2, input);
540 char *context_p2_line = single_line(context_p2_start);
541 ELOG("CONFIG: Line %3d: %s\n", linecnt - 2, context_p2_line);
542 free(context_p2_line);
544 ELOG("CONFIG: Line %3d: %s\n", linecnt - 1, context_p1_line);
545 free(context_p1_line);
547 ELOG("CONFIG: Line %3d: %s\n", linecnt, error_copy);
548 ELOG("CONFIG: %s\n", position);
550 /* Print context lines *after* the error, if any. */
551 for (int i = 0; i < 2; i++) {
552 char *error_line_end = strchr(error_line, '\n');
553 if (error_line_end != NULL && *(error_line_end + 1) != '\0') {
554 error_line = error_line_end + 1;
555 error_copy = single_line(error_line);
556 ELOG("CONFIG: Line %3d: %s\n", linecnt + i + 1, error_copy);
561 context->has_errors = true;
563 /* Format this error message as a JSON reply. */
567 /* We set parse_error to true to distinguish this from other
568 * errors. i3-nagbar is spawned upon keypresses only for parser
576 ystr("errorposition");
580 /* Skip the rest of this line, but continue parsing. */
581 while ((size_t)(walk - input) <= len && *walk != '\n')
588 /* To figure out in which state to go (e.g. MODE or INITIAL),
589 * we find the nearest state which contains an <error> token
590 * and follow that one. */
591 bool error_token_found = false;
592 for (int i = statelist_idx - 1; (i >= 0) && !error_token_found; i--) {
593 cmdp_token_ptr *errptr = &(tokens[statelist[i]]);
594 for (int j = 0; j < errptr->n; j++) {
595 if (strcmp(errptr->array[j].name, "error") != 0)
597 next_state(&(errptr->array[j]));
598 error_token_found = true;
603 assert(error_token_found);
609 return &command_output;
612 /*******************************************************************************
613 * Code for building the stand-alone binary test.commands_parser which is used
614 * by t/187-commands-parser.t.
615 ******************************************************************************/
620 * Logs the given message to stdout while prefixing the current time to it,
621 * but only if debug logging was activated.
622 * This is to be called by DLOG() which includes filename/linenumber
625 void debuglog(char *fmt, ...) {
629 fprintf(stdout, "# ");
630 vfprintf(stdout, fmt, args);
634 void errorlog(char *fmt, ...) {
638 vfprintf(stderr, fmt, args);
642 static int criteria_next_state;
644 void cfg_criteria_init(I3_CFG, int _state) {
645 criteria_next_state = _state;
648 void cfg_criteria_add(I3_CFG, const char *ctype, const char *cvalue) {
651 void cfg_criteria_pop_state(I3_CFG) {
652 result->next_state = criteria_next_state;
655 int main(int argc, char *argv[]) {
657 fprintf(stderr, "Syntax: %s <command>\n", argv[0]);
660 struct context context;
661 context.filename = "<stdin>";
662 parse_config(argv[1], &context);
668 * Goes through each line of buf (separated by \n) and checks for statements /
669 * commands which only occur in i3 v4 configuration files. If it finds any, it
670 * returns version 4, otherwise it returns version 3.
673 static int detect_version(char *buf) {
676 while (*walk != '\0') {
682 /* check for some v4-only statements */
683 if (strncasecmp(line, "bindcode", strlen("bindcode")) == 0 ||
684 strncasecmp(line, "force_focus_wrapping", strlen("force_focus_wrapping")) == 0 ||
685 strncasecmp(line, "# i3 config file (v4)", strlen("# i3 config file (v4)")) == 0 ||
686 strncasecmp(line, "workspace_layout", strlen("workspace_layout")) == 0) {
687 LOG("deciding for version 4 due to this line: %.*s\n", (int)(walk - line), line);
691 /* if this is a bind statement, we can check the command */
692 if (strncasecmp(line, "bind", strlen("bind")) == 0) {
693 char *bind = strchr(line, ' ');
696 while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
700 if ((bind = strchr(bind, ' ')) == NULL)
702 while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
706 if (strncasecmp(bind, "layout", strlen("layout")) == 0 ||
707 strncasecmp(bind, "floating", strlen("floating")) == 0 ||
708 strncasecmp(bind, "workspace", strlen("workspace")) == 0 ||
709 strncasecmp(bind, "focus left", strlen("focus left")) == 0 ||
710 strncasecmp(bind, "focus right", strlen("focus right")) == 0 ||
711 strncasecmp(bind, "focus up", strlen("focus up")) == 0 ||
712 strncasecmp(bind, "focus down", strlen("focus down")) == 0 ||
713 strncasecmp(bind, "border normal", strlen("border normal")) == 0 ||
714 strncasecmp(bind, "border 1pixel", strlen("border 1pixel")) == 0 ||
715 strncasecmp(bind, "border pixel", strlen("border pixel")) == 0 ||
716 strncasecmp(bind, "border borderless", strlen("border borderless")) == 0 ||
717 strncasecmp(bind, "--no-startup-id", strlen("--no-startup-id")) == 0 ||
718 strncasecmp(bind, "bar", strlen("bar")) == 0) {
719 LOG("deciding for version 4 due to this line: %.*s\n", (int)(walk - line), line);
725 /* advance to the next line */
734 * Calls i3-migrate-config-to-v4 to migrate a configuration file (input
737 * Returns the converted config file or NULL if there was an error (for
738 * example the script could not be found in $PATH or the i3 executable’s
742 static char *migrate_config(char *input, off_t size) {
746 if (pipe(writepipe) != 0 ||
747 pipe(readpipe) != 0) {
748 warn("migrate_config: Could not create pipes");
754 warn("Could not fork()");
760 /* close writing end of writepipe, connect reading side to stdin */
762 dup2(writepipe[0], 0);
764 /* close reading end of readpipe, connect writing side to stdout */
766 dup2(readpipe[1], 1);
768 static char *argv[] = {
769 NULL, /* will be replaced by the executable path */
771 exec_i3_utility("i3-migrate-config-to-v4", argv);
776 /* close reading end of the writepipe (connected to the script’s stdin) */
779 /* write the whole config file to the pipe, the script will read everything
781 if (writeall(writepipe[1], input, size) == -1) {
782 warn("Could not write to pipe");
787 /* close writing end of the readpipe (connected to the script’s stdout) */
790 /* read the script’s output */
791 int conv_size = 65535;
792 char *converted = malloc(conv_size);
793 int read_bytes = 0, ret;
795 if (read_bytes == conv_size) {
797 converted = realloc(converted, conv_size);
799 ret = read(readpipe[0], converted + read_bytes, conv_size - read_bytes);
801 warn("Cannot read from pipe");
808 /* get the returncode */
811 if (!WIFEXITED(status)) {
812 fprintf(stderr, "Child did not terminate normally, using old config file (will lead to broken behaviour)\n");
816 int returncode = WEXITSTATUS(status);
817 if (returncode != 0) {
818 fprintf(stderr, "Migration process exit code was != 0\n");
819 if (returncode == 2) {
820 fprintf(stderr, "could not start the migration script\n");
821 /* TODO: script was not found. tell the user to fix their system or create a v4 config */
822 } else if (returncode == 1) {
823 fprintf(stderr, "This already was a v4 config. Please add the following line to your config file:\n");
824 fprintf(stderr, "# i3 config file (v4)\n");
825 /* TODO: nag the user with a message to include a hint for i3 in their config file */
834 * Parses the given file by first replacing the variables, then calling
835 * parse_config and possibly launching i3-nagbar.
838 bool parse_file(const char *f, bool use_nagbar) {
839 SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
840 int fd, ret, read_bytes = 0;
844 char buffer[1026], key[512], value[512];
846 if ((fd = open(f, O_RDONLY)) == -1)
847 die("Could not open configuration file: %s\n", strerror(errno));
849 if (fstat(fd, &stbuf) == -1)
850 die("Could not fstat file: %s\n", strerror(errno));
852 buf = scalloc((stbuf.st_size + 1) * sizeof(char));
853 while (read_bytes < stbuf.st_size) {
854 if ((ret = read(fd, buf + read_bytes, (stbuf.st_size - read_bytes))) < 0)
855 die("Could not read(): %s\n", strerror(errno));
859 if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
860 die("Could not lseek: %s\n", strerror(errno));
862 if ((fstr = fdopen(fd, "r")) == NULL)
863 die("Could not fdopen: %s\n", strerror(errno));
865 while (!feof(fstr)) {
866 if (fgets(buffer, 1024, fstr) == NULL) {
869 die("Could not read configuration file\n");
872 /* sscanf implicitly strips whitespace. Also, we skip comments and empty lines. */
873 if (sscanf(buffer, "%s %[^\n]", key, value) < 1 ||
874 key[0] == '#' || strlen(key) < 3)
877 if (strcasecmp(key, "set") == 0) {
878 if (value[0] != '$') {
879 ELOG("Malformed variable assignment, name has to start with $\n");
883 /* get key/value for this variable */
884 char *v_key = value, *v_value;
885 if (strstr(value, " ") == NULL && strstr(value, "\t") == NULL) {
886 ELOG("Malformed variable assignment, need a value\n");
890 if (!(v_value = strstr(value, " ")))
891 v_value = strstr(value, "\t");
894 while (*v_value == '\t' || *v_value == ' ')
897 struct Variable *new = scalloc(sizeof(struct Variable));
898 new->key = sstrdup(v_key);
899 new->value = sstrdup(v_value);
900 SLIST_INSERT_HEAD(&variables, new, variables);
901 DLOG("Got new variable %s = %s\n", v_key, v_value);
907 /* For every custom variable, see how often it occurs in the file and
908 * how much extra bytes it requires when replaced. */
909 struct Variable *current, *nearest;
911 /* We need to copy the buffer because we need to invalidate the
912 * variables (otherwise we will count them twice, which is bad when
913 * 'extra' is negative) */
914 char *bufcopy = sstrdup(buf);
915 SLIST_FOREACH(current, &variables, variables) {
916 int extra = (strlen(current->value) - strlen(current->key));
919 next < (bufcopy + stbuf.st_size) &&
920 (next = strcasestr(next, current->key)) != NULL;
921 next += strlen(current->key)) {
923 extra_bytes += extra;
928 /* Then, allocate a new buffer and copy the file over to the new one,
929 * but replace occurences of our variables */
930 char *walk = buf, *destwalk;
931 char *new = smalloc((stbuf.st_size + extra_bytes + 1) * sizeof(char));
933 while (walk < (buf + stbuf.st_size)) {
934 /* Find the next variable */
935 SLIST_FOREACH(current, &variables, variables)
936 current->next_match = strcasestr(walk, current->key);
938 int distance = stbuf.st_size;
939 SLIST_FOREACH(current, &variables, variables) {
940 if (current->next_match == NULL)
942 if ((current->next_match - walk) < distance) {
943 distance = (current->next_match - walk);
947 if (nearest == NULL) {
948 /* If there are no more variables, we just copy the rest */
949 strncpy(destwalk, walk, (buf + stbuf.st_size) - walk);
950 destwalk += (buf + stbuf.st_size) - walk;
954 /* Copy until the next variable, then copy its value */
955 strncpy(destwalk, walk, distance);
956 strncpy(destwalk + distance, nearest->value, strlen(nearest->value));
957 walk += distance + strlen(nearest->key);
958 destwalk += distance + strlen(nearest->value);
962 /* analyze the string to find out whether this is an old config file (3.x)
963 * or a new config file (4.x). If it’s old, we run the converter script. */
964 int version = detect_version(buf);
966 /* We need to convert this v3 configuration */
967 char *converted = migrate_config(new, stbuf.st_size);
968 if (converted != NULL) {
970 ELOG("****************************************************************\n");
971 ELOG("NOTE: Automatically converted configuration file from v3 to v4.\n");
973 ELOG("Please convert your config file to v4. You can use this command:\n");
974 ELOG(" mv %s %s.O\n", f, f);
975 ELOG(" i3-migrate-config-to-v4 %s.O > %s\n", f, f);
976 ELOG("****************************************************************\n");
982 LOG("**********************************************************************\n");
983 LOG("ERROR: Could not convert config file. Maybe i3-migrate-config-to-v4\n");
984 LOG("was not correctly installed on your system?\n");
985 LOG("**********************************************************************\n");
990 context = scalloc(sizeof(struct context));
991 context->filename = f;
993 struct ConfigResultIR *config_output = parse_config(new, context);
994 yajl_gen_free(config_output->json_gen);
996 check_for_duplicate_bindings(context);
998 if (use_nagbar && (context->has_errors || context->has_warnings)) {
999 ELOG("FYI: You are using i3 version %s\n", i3_version);
1001 ELOG("Please convert your configfile first, then fix any remaining errors (see above).\n");
1005 sasprintf(&editaction, "i3-sensible-editor \"%s\" && i3-msg reload\n", f);
1006 sasprintf(&pageraction, "i3-sensible-pager \"%s\"\n", errorfilename);
1008 NULL, /* will be replaced by the executable path */
1010 (config.font.pattern ? config.font.pattern : "fixed"),
1012 (context->has_errors ? "error" : "warning"),
1014 (context->has_errors ? "You have an error in your i3 config file!" : "Your config is outdated. Please fix the warnings to make sure everything works."),
1018 (errorfilename ? "-b" : NULL),
1019 (context->has_errors ? "show errors" : "show warnings"),
1023 start_nagbar(&config_error_nagbar_pid, argv);
1028 bool has_errors = context->has_errors;
1030 FREE(context->line_copy);
1035 while (!SLIST_EMPTY(&variables)) {
1036 current = SLIST_FIRST(&variables);
1038 FREE(current->value);
1039 SLIST_REMOVE_HEAD(&variables, variables);