Annotation of src/usr.bin/tmux/cfg.c, Revision 1.64
1.64 ! nicm 1: /* $OpenBSD: cfg.c,v 1.63 2019/02/16 11:42:08 nicm Exp $ */
1.1 nicm 2:
3: /*
1.44 nicm 4: * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20:
1.21 nicm 21: #include <ctype.h>
1.1 nicm 22: #include <errno.h>
23: #include <stdio.h>
1.15 nicm 24: #include <stdlib.h>
1.1 nicm 25: #include <string.h>
1.32 tobias 26: #include <util.h>
1.1 nicm 27:
28: #include "tmux.h"
29:
1.61 nicm 30: /* Condition for %if, %elif, %else and %endif. */
31: struct cfg_cond {
32: size_t line; /* line number of %if */
33: int met; /* condition was met */
34: int skip; /* skip later %elif/%else */
35: int saw_else; /* saw a %else */
36:
37: TAILQ_ENTRY(cfg_cond) entry;
38: };
39: TAILQ_HEAD(cfg_conds, cfg_cond);
40:
1.63 nicm 41: struct client *cfg_client;
1.58 nicm 42: static char *cfg_file;
43: int cfg_finished;
44: static char **cfg_causes;
45: static u_int cfg_ncauses;
46: static struct cmdq_item *cfg_item;
47:
48: static enum cmd_retval
49: cfg_client_done(__unused struct cmdq_item *item, __unused void *data)
50: {
51: if (!cfg_finished)
52: return (CMD_RETURN_WAIT);
53: return (CMD_RETURN_NORMAL);
54: }
1.40 nicm 55:
1.49 nicm 56: static enum cmd_retval
1.50 nicm 57: cfg_done(__unused struct cmdq_item *item, __unused void *data)
1.49 nicm 58: {
59: if (cfg_finished)
60: return (CMD_RETURN_NORMAL);
61: cfg_finished = 1;
62:
63: if (!RB_EMPTY(&sessions))
64: cfg_show_causes(RB_MIN(sessions, &sessions));
1.57 nicm 65:
1.58 nicm 66: if (cfg_item != NULL)
67: cfg_item->flags &= ~CMDQ_WAITING;
68:
1.57 nicm 69: status_prompt_load_history();
1.49 nicm 70:
71: return (CMD_RETURN_NORMAL);
72: }
1.40 nicm 73:
74: void
1.41 nicm 75: set_cfg_file(const char *path)
76: {
77: free(cfg_file);
78: cfg_file = xstrdup(path);
79: }
80:
81: void
1.40 nicm 82: start_cfg(void)
83: {
1.41 nicm 84: const char *home;
1.45 tim 85: int quiet = 0;
1.58 nicm 86: struct client *c;
1.40 nicm 87:
1.56 nicm 88: /*
1.58 nicm 89: * Configuration files are loaded without a client, so NULL is passed
90: * into load_cfg() and commands run in the global queue with
91: * item->client NULL.
92: *
93: * However, we must block the initial client (but just the initial
94: * client) so that its command runs after the configuration is loaded.
95: * Because start_cfg() is called so early, we can be sure the client's
96: * command queue is currently empty and our callback will be at the
97: * front - we need to get in before MSG_COMMAND.
1.56 nicm 98: */
1.63 nicm 99: cfg_client = c = TAILQ_FIRST(&clients);
1.58 nicm 100: if (c != NULL) {
101: cfg_item = cmdq_get_callback(cfg_client_done, NULL);
102: cmdq_append(c, cfg_item);
103: }
1.40 nicm 104:
1.56 nicm 105: load_cfg(TMUX_CONF, NULL, NULL, 1);
1.40 nicm 106:
1.41 nicm 107: if (cfg_file == NULL && (home = find_home()) != NULL) {
108: xasprintf(&cfg_file, "%s/.tmux.conf", home);
1.45 tim 109: quiet = 1;
1.41 nicm 110: }
1.45 tim 111: if (cfg_file != NULL)
1.56 nicm 112: load_cfg(cfg_file, NULL, NULL, quiet);
1.40 nicm 113:
1.56 nicm 114: cmdq_append(NULL, cmdq_get_callback(cfg_done, NULL));
1.40 nicm 115: }
1.1 nicm 116:
1.61 nicm 117: static int
118: cfg_check_condition(const char *path, size_t line, const char *p, int *skip)
119: {
120: struct format_tree *ft;
121: char *s;
122: int result;
123:
124: while (isspace((u_char)*p))
125: p++;
126: if (p[0] == '\0') {
127: cfg_add_cause("%s:%zu: invalid condition", path, line);
128: *skip = 1;
129: return (0);
130: }
131:
132: ft = format_create(NULL, NULL, FORMAT_NONE, FORMAT_NOJOBS);
133: s = format_expand(ft, p);
134: result = format_true(s);
135: free(s);
136: format_free(ft);
137:
138: *skip = result;
139: return (result);
140: }
141:
142: static void
143: cfg_handle_if(const char *path, size_t line, struct cfg_conds *conds,
144: const char *p)
145: {
146: struct cfg_cond *cond;
147: struct cfg_cond *parent = TAILQ_FIRST(conds);
148:
149: /*
150: * Add a new condition. If a previous condition exists and isn't
151: * currently met, this new one also can't be met.
152: */
153: cond = xcalloc(1, sizeof *cond);
154: cond->line = line;
155: if (parent == NULL || parent->met)
156: cond->met = cfg_check_condition(path, line, p, &cond->skip);
157: else
158: cond->skip = 1;
159: cond->saw_else = 0;
160: TAILQ_INSERT_HEAD(conds, cond, entry);
161: }
162:
163: static void
164: cfg_handle_elif(const char *path, size_t line, struct cfg_conds *conds,
165: const char *p)
166: {
167: struct cfg_cond *cond = TAILQ_FIRST(conds);
168:
169: /*
170: * If a previous condition exists and wasn't met, check this
171: * one instead and change the state.
172: */
173: if (cond == NULL || cond->saw_else)
174: cfg_add_cause("%s:%zu: unexpected %%elif", path, line);
175: else if (!cond->skip)
176: cond->met = cfg_check_condition(path, line, p, &cond->skip);
177: else
178: cond->met = 0;
179: }
180:
181: static void
182: cfg_handle_else(const char *path, size_t line, struct cfg_conds *conds)
183: {
184: struct cfg_cond *cond = TAILQ_FIRST(conds);
185:
186: /*
187: * If a previous condition exists and wasn't met and wasn't already
188: * %else, use this one instead.
189: */
190: if (cond == NULL || cond->saw_else) {
191: cfg_add_cause("%s:%zu: unexpected %%else", path, line);
192: return;
193: }
194: cond->saw_else = 1;
195: cond->met = !cond->skip;
196: cond->skip = 1;
197: }
198:
199: static void
200: cfg_handle_endif(const char *path, size_t line, struct cfg_conds *conds)
201: {
202: struct cfg_cond *cond = TAILQ_FIRST(conds);
203:
204: /*
205: * Remove previous condition if one exists.
206: */
207: if (cond == NULL) {
208: cfg_add_cause("%s:%zu: unexpected %%endif", path, line);
209: return;
210: }
211: TAILQ_REMOVE(conds, cond, entry);
212: free(cond);
213: }
214:
215: static void
216: cfg_handle_directive(const char *p, const char *path, size_t line,
217: struct cfg_conds *conds)
218: {
219: int n = 0;
220:
221: while (p[n] != '\0' && !isspace((u_char)p[n]))
222: n++;
223: if (strncmp(p, "%if", n) == 0)
224: cfg_handle_if(path, line, conds, p + n);
225: else if (strncmp(p, "%elif", n) == 0)
226: cfg_handle_elif(path, line, conds, p + n);
227: else if (strcmp(p, "%else") == 0)
228: cfg_handle_else(path, line, conds);
229: else if (strcmp(p, "%endif") == 0)
230: cfg_handle_endif(path, line, conds);
231: else
232: cfg_add_cause("%s:%zu: invalid directive: %s", path, line, p);
233: }
234:
1.28 nicm 235: int
1.50 nicm 236: load_cfg(const char *path, struct client *c, struct cmdq_item *item, int quiet)
1.1 nicm 237: {
1.50 nicm 238: FILE *f;
1.52 nicm 239: const char delim[3] = { '\\', '\\', '\0' };
240: u_int found = 0;
1.50 nicm 241: size_t line = 0;
1.61 nicm 242: char *buf, *cause1, *p, *q;
1.50 nicm 243: struct cmd_list *cmdlist;
244: struct cmdq_item *new_item;
1.61 nicm 245: struct cfg_cond *cond, *cond1;
246: struct cfg_conds conds;
247:
248: TAILQ_INIT(&conds);
1.1 nicm 249:
1.29 nicm 250: log_debug("loading %s", path);
1.1 nicm 251: if ((f = fopen(path, "rb")) == NULL) {
1.45 tim 252: if (errno == ENOENT && quiet)
253: return (0);
254: cfg_add_cause("%s: %s", path, strerror(errno));
1.28 nicm 255: return (-1);
1.25 nicm 256: }
257:
1.42 nicm 258: while ((buf = fparseln(f, NULL, &line, delim, 0)) != NULL) {
1.32 tobias 259: log_debug("%s: %s", path, buf);
1.13 nicm 260:
1.32 tobias 261: p = buf;
1.52 nicm 262: while (isspace((u_char)*p))
1.32 tobias 263: p++;
264: if (*p == '\0') {
265: free(buf);
1.21 nicm 266: continue;
1.22 nicm 267: }
1.52 nicm 268: q = p + strlen(p) - 1;
269: while (q != p && isspace((u_char)*q))
270: *q-- = '\0';
271:
1.61 nicm 272: if (*p == '%') {
273: cfg_handle_directive(p, path, line, &conds);
1.52 nicm 274: continue;
275: }
1.61 nicm 276: cond = TAILQ_FIRST(&conds);
277: if (cond != NULL && !cond->met)
1.52 nicm 278: continue;
1.21 nicm 279:
1.53 nicm 280: cmdlist = cmd_string_parse(p, path, line, &cause1);
281: if (cmdlist == NULL) {
1.32 tobias 282: free(buf);
1.28 nicm 283: if (cause1 == NULL)
1.1 nicm 284: continue;
1.33 nicm 285: cfg_add_cause("%s:%zu: %s", path, line, cause1);
1.28 nicm 286: free(cause1);
1.9 nicm 287: continue;
1.20 nicm 288: }
1.32 tobias 289: free(buf);
1.28 nicm 290:
1.50 nicm 291: new_item = cmdq_get_command(cmdlist, NULL, NULL, 0);
292: if (item != NULL)
293: cmdq_insert_after(item, new_item);
1.49 nicm 294: else
1.50 nicm 295: cmdq_append(c, new_item);
1.1 nicm 296: cmd_list_free(cmdlist);
1.49 nicm 297:
1.28 nicm 298: found++;
1.1 nicm 299: }
300: fclose(f);
1.61 nicm 301:
302: TAILQ_FOREACH_REVERSE_SAFE(cond, &conds, cfg_conds, entry, cond1) {
303: cfg_add_cause("%s:%zu: unterminated %%if", path, cond->line);
304: TAILQ_REMOVE(&conds, cond, entry);
305: free(cond);
306: }
1.25 nicm 307:
1.28 nicm 308: return (found);
1.33 nicm 309: }
310:
311: void
1.36 nicm 312: cfg_add_cause(const char *fmt, ...)
1.33 nicm 313: {
1.36 nicm 314: va_list ap;
315: char *msg;
1.33 nicm 316:
317: va_start(ap, fmt);
318: xvasprintf(&msg, fmt, ap);
1.38 nicm 319: va_end(ap);
1.33 nicm 320:
1.35 nicm 321: cfg_ncauses++;
322: cfg_causes = xreallocarray(cfg_causes, cfg_ncauses, sizeof *cfg_causes);
323: cfg_causes[cfg_ncauses - 1] = msg;
1.33 nicm 324: }
325:
326: void
1.50 nicm 327: cfg_print_causes(struct cmdq_item *item)
1.33 nicm 328: {
329: u_int i;
330:
1.35 nicm 331: for (i = 0; i < cfg_ncauses; i++) {
1.50 nicm 332: cmdq_print(item, "%s", cfg_causes[i]);
1.35 nicm 333: free(cfg_causes[i]);
1.33 nicm 334: }
1.35 nicm 335:
336: free(cfg_causes);
337: cfg_causes = NULL;
1.37 nicm 338: cfg_ncauses = 0;
1.17 nicm 339: }
340:
341: void
1.28 nicm 342: cfg_show_causes(struct session *s)
1.17 nicm 343: {
344: struct window_pane *wp;
345: u_int i;
346:
1.35 nicm 347: if (s == NULL || cfg_ncauses == 0)
1.17 nicm 348: return;
349: wp = s->curw->window->active;
350:
351: window_copy_init_for_output(wp);
1.35 nicm 352: for (i = 0; i < cfg_ncauses; i++) {
353: window_copy_add(wp, "%s", cfg_causes[i]);
354: free(cfg_causes[i]);
1.17 nicm 355: }
1.35 nicm 356:
357: free(cfg_causes);
358: cfg_causes = NULL;
1.37 nicm 359: cfg_ncauses = 0;
1.1 nicm 360: }
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