Annotation of src/usr.bin/make/var.c, Revision 1.68
1.53 espie 1: /* $OpenPackages$ */
1.65 espie 2: /* $OpenBSD: var.c,v 1.64 2007/07/08 17:53:15 espie Exp $ */
1.6 millert 3: /* $NetBSD: var.c,v 1.18 1997/03/18 19:24:46 christos Exp $ */
1.1 deraadt 4:
5: /*
1.62 espie 6: * Copyright (c) 1999,2000,2007 Marc Espie.
1.17 espie 7: *
8: * Extensive code modifications for the OpenBSD project.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
20: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
23: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */
31: /*
1.5 millert 32: * Copyright (c) 1988, 1989, 1990, 1993
33: * The Regents of the University of California. All rights reserved.
1.1 deraadt 34: * Copyright (c) 1989 by Berkeley Softworks
35: * All rights reserved.
36: *
37: * This code is derived from software contributed to Berkeley by
38: * Adam de Boor.
39: *
40: * Redistribution and use in source and binary forms, with or without
41: * modification, are permitted provided that the following conditions
42: * are met:
43: * 1. Redistributions of source code must retain the above copyright
44: * notice, this list of conditions and the following disclaimer.
45: * 2. Redistributions in binary form must reproduce the above copyright
46: * notice, this list of conditions and the following disclaimer in the
47: * documentation and/or other materials provided with the distribution.
1.57 millert 48: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 49: * may be used to endorse or promote products derived from this software
50: * without specific prior written permission.
51: *
52: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62: * SUCH DAMAGE.
63: */
64:
1.55 espie 65: #include <assert.h>
66: #include <stddef.h>
67: #include <stdio.h>
1.60 espie 68: #include <stdint.h>
1.55 espie 69: #include <stdlib.h>
70: #include <string.h>
71:
72: #include "config.h"
73: #include "defines.h"
74: #include "buf.h"
75: #include "stats.h"
76: #include "ohash.h"
1.62 espie 77: #include "pathnames.h"
1.55 espie 78: #include "varmodifiers.h"
79: #include "var.h"
80: #include "varname.h"
81: #include "error.h"
82: #include "str.h"
83: #include "var_int.h"
84: #include "memory.h"
85: #include "symtable.h"
86: #include "gnode.h"
87:
1.1 deraadt 88: /*
89: * This is a harmless return value for Var_Parse that can be used by Var_Subst
90: * to determine if there was an error in parsing -- easier than returning
91: * a flag, as things outside this module don't give a hoot.
92: */
1.53 espie 93: char var_Error[] = "";
1.1 deraadt 94:
95: /*
96: * Similar to var_Error, but returned when the 'err' flag for Var_Parse is
97: * set false. Why not just use a constant? Well, gcc likes to condense
98: * identical string instances...
99: */
100: static char varNoError[] = "";
1.66 espie 101: bool errorIsOkay;
102: static bool checkEnvFirst; /* true if environment should be searched for
103: * variables before the global context */
1.62 espie 104:
105: void
106: Var_setCheckEnvFirst(bool yes)
107: {
108: checkEnvFirst = yes;
109: }
1.1 deraadt 110:
111: /*
1.66 espie 112: * The rules for variable look-up are complicated.
113: *
114: * - Dynamic variables like $@ and $* are special. They always pertain to
115: * a given variable. In this implementation of make, it is an error to
116: * try to affect them manually. They are stored in a local symtable directly
117: * inside the gnode.
118: *
119: * Global variables can be obtained:
120: * - from the command line
121: * - from the environment
122: * - from the Makefile proper.
123: * All of these are stored in a hash global_variables.
124: *
125: * Variables set on the command line override Makefile contents, are
126: * passed to submakes (see Var_AddCmdLine), and are also exported to the
127: * environment.
128: *
129: * Without -e (!checkEnvFirst), make will see variables set in the
130: * Makefile, and default to the environment otherwise.
131: *
132: * With -e (checkEnvFirst), make will see the environment first, and that
133: * will override anything that's set in the Makefile (but not set on
134: * the command line).
135: *
136: * The SHELL variable is very special: it is never obtained from the
137: * environment, and never passed to the environment.
1.1 deraadt 138: */
1.53 espie 139:
1.66 espie 140: /* definitions pertaining to dynamic variables */
141:
142: /* full names of dynamic variables */
1.53 espie 143: static char *varnames[] = {
1.66 espie 144: TARGET,
145: PREFIX,
146: ARCHIVE,
147: MEMBER,
148: OODATE,
149: ALLSRC,
150: IMPSRC,
151: FTARGET,
152: DTARGET,
153: FPREFIX,
154: DPREFIX,
155: FARCHIVE,
156: DARCHIVE,
157: FMEMBER,
158: DMEMBER
159: };
1.53 espie 160:
1.66 espie 161: /* hashed names of dynamic variables */
1.65 espie 162: #include "varhashconsts.h"
163:
164: /* extended indices for System V stuff */
165: #define FTARGET_INDEX 7
166: #define DTARGET_INDEX 8
167: #define FPREFIX_INDEX 9
168: #define DPREFIX_INDEX 10
169: #define FARCHIVE_INDEX 11
170: #define DARCHIVE_INDEX 12
171: #define FMEMBER_INDEX 13
172: #define DMEMBER_INDEX 14
173:
1.66 espie 174: #define GLOBAL_INDEX -1
175:
1.65 espie 176: #define EXTENDED2SIMPLE(i) (((i)-LOCAL_SIZE)/2)
177: #define IS_EXTENDED_F(i) ((i)%2 == 1)
178:
1.66 espie 179:
1.65 espie 180: static struct ohash global_variables;
1.1 deraadt 181:
1.66 espie 182:
1.37 espie 183: typedef struct Var_ {
1.66 espie 184: BUFFER val; /* the variable value */
185: unsigned int flags; /* miscellaneous status flags */
1.62 espie 186: #define VAR_IN_USE 1 /* Variable's value currently being used. */
1.66 espie 187: /* (Used to avoid recursion) */
188: #define VAR_DUMMY 2 /* Variable is currently just a name */
189: /* In particular: BUFFER is invalid */
190: #define VAR_FROM_CMD 4 /* Special source: command line */
191: #define VAR_FROM_ENV 8 /* Special source: environment */
192: #define VAR_SEEN_ENV 16 /* No need to go look up environment again */
193: #define VAR_SHELL 32 /* Magic behavior */
194:
1.62 espie 195: #define POISONS (POISON_NORMAL | POISON_EMPTY | POISON_NOT_DEFINED)
1.66 espie 196: /* Defined in var.h */
197: char name[1]; /* the variable's name */
1.1 deraadt 198: } Var;
199:
1.53 espie 200:
201: static struct ohash_info var_info = {
202: offsetof(Var, name),
1.66 espie 203: NULL,
204: hash_alloc, hash_free, element_alloc
205: };
206:
207: static int classify_var(const char *, const char **, uint32_t *);
208: static Var *find_any_var(const char *, const char *, SymTable *, int, uint32_t);
1.62 espie 209: static Var *find_global_var(const char *, const char *, uint32_t);
1.66 espie 210: static Var *find_global_var_without_env(const char *, const char *, uint32_t);
1.62 espie 211: static void fill_from_env(Var *);
1.53 espie 212: static Var *create_var(const char *, const char *);
1.66 espie 213: static void var_set_initial_value(Var *, const char *);
214: static void var_set_value(Var *, const char *);
215: #define var_get_value(v) Buf_Retrieve(&((v)->val))
216: static void var_append_value(Var *, const char *);
217: static void poison_check(Var *);
1.62 espie 218: static void varq_set_append(int, const char *, GNode *, bool);
219: static void var_set_append(const char *, const char *, const char *, int, bool);
220: static void set_magic_shell_variable(void);
1.66 espie 221:
222: static void delete_var(Var *);
223: static void print_var(Var *);
224:
225:
1.53 espie 226: static const char *find_rparen(const char *);
227: static const char *find_ket(const char *);
228: typedef const char * (*find_t)(const char *);
229: static find_t find_pos(int);
230:
1.66 espie 231:
232:
233: /* Variable lookup function: return idx for dynamic variable, or
234: * GLOBAL_INDEX if name is not dynamic. Set up *pk for further use.
235: */
1.38 espie 236: static int
1.66 espie 237: classify_var(const char *name, const char **enamePtr, uint32_t *pk)
1.38 espie 238: {
1.66 espie 239: size_t len;
1.38 espie 240:
1.66 espie 241: *pk = ohash_interval(name, enamePtr);
242: len = *enamePtr - name;
243: /* substitute short version for long local name */
244: switch (*pk % MAGICSLOTS1) { /* MAGICSLOTS should be the */
245: case K_LONGALLSRC % MAGICSLOTS1:/* smallest constant yielding */
246: /* distinct case values */
247: if (*pk == K_LONGALLSRC && len == strlen(LONGALLSRC) &&
248: strncmp(name, LONGALLSRC, len) == 0)
249: return ALLSRC_INDEX;
250: break;
251: case K_LONGARCHIVE % MAGICSLOTS1:
252: if (*pk == K_LONGARCHIVE && len == strlen(LONGARCHIVE) &&
253: strncmp(name, LONGARCHIVE, len) == 0)
254: return ARCHIVE_INDEX;
255: break;
256: case K_LONGIMPSRC % MAGICSLOTS1:
257: if (*pk == K_LONGIMPSRC && len == strlen(LONGIMPSRC) &&
258: strncmp(name, LONGIMPSRC, len) == 0)
259: return IMPSRC_INDEX;
260: break;
261: case K_LONGMEMBER % MAGICSLOTS1:
262: if (*pk == K_LONGMEMBER && len == strlen(LONGMEMBER) &&
263: strncmp(name, LONGMEMBER, len) == 0)
264: return MEMBER_INDEX;
265: break;
266: case K_LONGOODATE % MAGICSLOTS1:
267: if (*pk == K_LONGOODATE && len == strlen(LONGOODATE) &&
268: strncmp(name, LONGOODATE, len) == 0)
269: return OODATE_INDEX;
270: break;
271: case K_LONGPREFIX % MAGICSLOTS1:
272: if (*pk == K_LONGPREFIX && len == strlen(LONGPREFIX) &&
273: strncmp(name, LONGPREFIX, len) == 0)
274: return PREFIX_INDEX;
275: break;
276: case K_LONGTARGET % MAGICSLOTS1:
277: if (*pk == K_LONGTARGET && len == strlen(LONGTARGET) &&
278: strncmp(name, LONGTARGET, len) == 0)
279: return TARGET_INDEX;
280: break;
281: case K_TARGET % MAGICSLOTS1:
282: if (name[0] == TARGET[0] && len == 1)
283: return TARGET_INDEX;
284: break;
285: case K_OODATE % MAGICSLOTS1:
286: if (name[0] == OODATE[0] && len == 1)
287: return OODATE_INDEX;
288: break;
289: case K_ALLSRC % MAGICSLOTS1:
290: if (name[0] == ALLSRC[0] && len == 1)
291: return ALLSRC_INDEX;
292: break;
293: case K_IMPSRC % MAGICSLOTS1:
294: if (name[0] == IMPSRC[0] && len == 1)
295: return IMPSRC_INDEX;
296: break;
297: case K_PREFIX % MAGICSLOTS1:
298: if (name[0] == PREFIX[0] && len == 1)
299: return PREFIX_INDEX;
300: break;
301: case K_ARCHIVE % MAGICSLOTS1:
302: if (name[0] == ARCHIVE[0] && len == 1)
303: return ARCHIVE_INDEX;
304: break;
305: case K_MEMBER % MAGICSLOTS1:
306: if (name[0] == MEMBER[0] && len == 1)
307: return MEMBER_INDEX;
308: break;
309: case K_FTARGET % MAGICSLOTS1:
310: if (name[0] == FTARGET[0] && name[1] == FTARGET[1] && len == 2)
311: return FTARGET_INDEX;
312: break;
313: case K_DTARGET % MAGICSLOTS1:
314: if (name[0] == DTARGET[0] && name[1] == DTARGET[1] && len == 2)
315: return DTARGET_INDEX;
316: break;
317: case K_FPREFIX % MAGICSLOTS1:
318: if (name[0] == FPREFIX[0] && name[1] == FPREFIX[1] && len == 2)
319: return FPREFIX_INDEX;
320: break;
321: case K_DPREFIX % MAGICSLOTS1:
322: if (name[0] == DPREFIX[0] && name[1] == DPREFIX[1] && len == 2)
323: return DPREFIX_INDEX;
324: break;
325: case K_FARCHIVE % MAGICSLOTS1:
326: if (name[0] == FARCHIVE[0] && name[1] == FARCHIVE[1] &&
327: len == 2)
328: return FARCHIVE_INDEX;
329: break;
330: case K_DARCHIVE % MAGICSLOTS1:
331: if (name[0] == DARCHIVE[0] && name[1] == DARCHIVE[1] &&
332: len == 2)
333: return DARCHIVE_INDEX;
334: break;
335: case K_FMEMBER % MAGICSLOTS1:
336: if (name[0] == FMEMBER[0] && name[1] == FMEMBER[1] && len == 2)
337: return FMEMBER_INDEX;
338: break;
339: case K_DMEMBER % MAGICSLOTS1:
340: if (name[0] == DMEMBER[0] && name[1] == DMEMBER[1] && len == 2)
341: return DMEMBER_INDEX;
342: break;
343: default:
344: break;
345: }
346: return GLOBAL_INDEX;
1.38 espie 347: }
1.37 espie 348:
1.66 espie 349:
350: /***
351: *** Internal handling of variables.
352: ***/
353:
354:
355: /* Create a new variable, does not initialize anything except the name.
356: * in particular, buffer is invalid, and flag value is invalid. Accordingly,
357: * must either:
358: * - set flags to VAR_DUMMY
359: * - set flags to !VAR_DUMMY, and initialize buffer, for instance with
360: * var_set_initial_value().
361: */
1.65 espie 362: static Var *
363: create_var(const char *name, const char *ename)
364: {
1.66 espie 365: return ohash_create_entry(&var_info, name, &ename);
1.65 espie 366: }
367:
1.66 espie 368: /* Initial version of var_set_value(), to be called after create_var().
369: */
1.65 espie 370: static void
1.66 espie 371: var_set_initial_value(Var *v, const char *val)
1.65 espie 372: {
1.66 espie 373: size_t len;
1.65 espie 374:
1.66 espie 375: len = strlen(val);
376: Buf_Init(&(v->val), len+1);
377: Buf_AddChars(&(v->val), len, val);
1.65 espie 378: }
379:
1.66 espie 380: /* Normal version of var_set_value(), to be called after variable is fully
381: * initialized.
382: */
1.65 espie 383: static void
1.66 espie 384: var_set_value(Var *v, const char *val)
1.65 espie 385: {
1.66 espie 386: if ((v->flags & VAR_DUMMY) == 0) {
387: Buf_Reset(&(v->val));
388: Buf_AddString(&(v->val), val);
389: } else {
390: var_set_initial_value(v, val);
391: v->flags &= ~VAR_DUMMY;
392: }
1.65 espie 393: }
394:
1.66 espie 395: /* Add to a variable, insert a separating space if the variable was already
396: * defined.
397: */
1.65 espie 398: static void
1.66 espie 399: var_append_value(Var *v, const char *val)
1.65 espie 400: {
1.66 espie 401: if ((v->flags & VAR_DUMMY) == 0) {
402: Buf_AddSpace(&(v->val));
403: Buf_AddString(&(v->val), val);
404: } else {
405: var_set_initial_value(v, val);
406: v->flags &= ~VAR_DUMMY;
407: }
408: }
409:
410:
411: /* Delete a variable and all the space associated with it.
1.65 espie 412: */
413: static void
1.66 espie 414: delete_var(Var *v)
1.65 espie 415: {
1.66 espie 416: if ((v->flags & VAR_DUMMY) == 0)
417: Buf_Destroy(&(v->val));
418: free(v);
1.65 espie 419: }
420:
421:
422:
1.66 espie 423:
424: /***
425: *** Dynamic variable handling.
426: ***/
427:
428:
429:
430: /* create empty symtable.
431: * XXX: to save space, dynamic variables may be NULL pointers.
432: */
1.65 espie 433: void
434: SymTable_Init(SymTable *ctxt)
435: {
1.66 espie 436: static SymTable sym_template;
437: memcpy(ctxt, &sym_template, sizeof(*ctxt));
1.65 espie 438: }
439:
1.66 espie 440: /* free symtable.
441: */
1.65 espie 442: #ifdef CLEANUP
443: void
444: SymTable_Destroy(SymTable *ctxt)
445: {
1.66 espie 446: int i;
1.65 espie 447:
1.66 espie 448: for (i = 0; i < LOCAL_SIZE; i++)
449: if (ctxt->locals[i] != NULL)
450: delete_var(ctxt->locals[i]);
1.65 espie 451: }
452: #endif
453:
1.66 espie 454: /* set or append to dynamic variable.
455: */
1.62 espie 456: static void
457: varq_set_append(int idx, const char *val, GNode *gn, bool append)
1.37 espie 458: {
1.66 espie 459: Var *v = gn->context.locals[idx];
1.37 espie 460:
1.66 espie 461: if (v == NULL) {
462: v = create_var(varnames[idx], NULL);
1.62 espie 463: #ifdef STATS_VAR_LOOKUP
1.66 espie 464: STAT_VAR_CREATION++;
1.62 espie 465: #endif
1.66 espie 466: if (val != NULL)
467: var_set_initial_value(v, val);
468: else
469: Buf_Init(&(v->val), 1);
470: v->flags = 0;
471: gn->context.locals[idx] = v;
472: } else {
473: if (append)
474: Buf_AddSpace(&(v->val));
475: else
476: Buf_Reset(&(v->val));
477: Buf_AddString(&(v->val), val);
478: }
479: if (DEBUG(VAR))
480: printf("%s:%s = %s\n", gn->name, varnames[idx],
481: var_get_value(v));
1.62 espie 482: }
483:
484: void
485: Varq_Set(int idx, const char *val, GNode *gn)
486: {
1.66 espie 487: varq_set_append(idx, val, gn, false);
1.37 espie 488: }
489:
1.53 espie 490: void
1.59 espie 491: Varq_Append(int idx, const char *val, GNode *gn)
1.37 espie 492: {
1.66 espie 493: varq_set_append(idx, val, gn, true);
1.37 espie 494: }
495:
496: char *
1.59 espie 497: Varq_Value(int idx, GNode *gn)
1.37 espie 498: {
1.66 espie 499: Var *v = gn->context.locals[idx];
1.37 espie 500:
1.66 espie 501: if (v == NULL)
502: return NULL;
503: else
504: return var_get_value(v);
1.53 espie 505: }
506:
1.66 espie 507: /***
508: *** Global variable handling.
509: ***/
510:
511: /* Create a new global var if necessary, and set it up correctly.
512: * Do not take environment into account.
513: */
1.53 espie 514: static Var *
1.66 espie 515: find_global_var_without_env(const char *name, const char *ename, uint32_t k)
1.37 espie 516: {
1.65 espie 517: unsigned int slot;
518: Var *v;
1.1 deraadt 519:
1.65 espie 520: slot = ohash_lookup_interval(&global_variables, name, ename, k);
521: v = ohash_find(&global_variables, slot);
522: if (v == NULL) {
523: v = create_var(name, ename);
524: v->flags = VAR_DUMMY;
525: ohash_insert(&global_variables, slot, v);
526: }
527: return v;
1.35 espie 528: }
1.53 espie 529:
1.66 espie 530: /* Helper for find_global_var(): grab environment value if needed.
531: */
1.62 espie 532: static void
533: fill_from_env(Var *v)
1.37 espie 534: {
1.66 espie 535: char *env;
1.37 espie 536:
1.66 espie 537: env = getenv(v->name);
538: if (env == NULL)
539: v->flags |= VAR_SEEN_ENV;
540: else {
541: var_set_value(v, env);
542: v->flags |= VAR_FROM_ENV | VAR_SEEN_ENV;
543: }
1.37 espie 544:
1.53 espie 545: #ifdef STATS_VAR_LOOKUP
1.66 espie 546: STAT_VAR_FROM_ENV++;
1.53 espie 547: #endif
1.62 espie 548: }
1.37 espie 549:
1.66 espie 550: /* Find global var, and obtain its value from the environment if needed.
551: */
1.62 espie 552: static Var *
1.65 espie 553: find_global_var(const char *name, const char *ename, uint32_t k)
554: {
1.66 espie 555: Var *v;
1.65 espie 556:
1.66 espie 557: v = find_global_var_without_env(name, ename, k);
1.65 espie 558:
1.66 espie 559: if ((v->flags & VAR_SEEN_ENV) == 0 &&
560: (checkEnvFirst && (v->flags & VAR_FROM_CMD) == 0 ||
561: (v->flags & VAR_DUMMY) != 0))
562: fill_from_env(v);
1.65 espie 563:
1.66 espie 564: return v;
1.65 espie 565: }
566:
1.66 espie 567: /* mark variable as poisoned, in a given setup.
568: */
1.65 espie 569: void
570: Var_MarkPoisoned(const char *name, const char *ename, unsigned int type)
1.62 espie 571: {
1.65 espie 572: Var *v;
573: uint32_t k;
574: int idx;
1.66 espie 575: idx = classify_var(name, &ename, &k);
1.65 espie 576:
1.66 espie 577: if (idx != GLOBAL_INDEX) {
578: Parse_Error(PARSE_FATAL,
1.65 espie 579: "Trying to poison dynamic variable $%s",
580: varnames[idx]);
581: return;
582: }
1.62 espie 583:
1.65 espie 584: v = find_global_var(name, ename, k);
585: v->flags |= type;
1.66 espie 586: /* POISON_NORMAL is not lazy: if the variable already exists in
587: * the Makefile, then it's a mistake.
588: */
1.65 espie 589: if (v->flags & POISON_NORMAL) {
590: if (v->flags & VAR_DUMMY)
591: return;
592: if (v->flags & VAR_FROM_ENV)
593: return;
594: Parse_Error(PARSE_FATAL,
595: "Poisoned variable %s is already set\n", v->name);
1.62 espie 596: }
1.37 espie 597: }
598:
1.66 espie 599: /* Check if there's any reason not to use the variable in this context.
600: */
1.62 espie 601: static void
602: poison_check(Var *v)
1.1 deraadt 603: {
1.62 espie 604: if (v->flags & POISON_NORMAL) {
1.66 espie 605: Parse_Error(PARSE_FATAL,
1.62 espie 606: "Poisoned variable %s has been referenced\n", v->name);
607: return;
608: }
609: if (v->flags & VAR_DUMMY) {
610: Parse_Error(PARSE_FATAL,
611: "Poisoned variable %s is not defined\n", v->name);
612: return;
613: }
614: if (v->flags & POISON_EMPTY)
1.66 espie 615: if (strcmp(var_get_value(v), "") == 0)
616: Parse_Error(PARSE_FATAL,
1.62 espie 617: "Poisoned variable %s is empty\n", v->name);
1.37 espie 618: }
619:
1.66 espie 620: /* Delete global variable.
621: */
1.1 deraadt 622: void
1.66 espie 623: Var_Deletei(const char *name, const char *ename)
1.1 deraadt 624: {
1.66 espie 625: Var *v;
626: uint32_t k;
1.62 espie 627: unsigned int slot;
1.66 espie 628: int idx;
1.62 espie 629:
1.66 espie 630: idx = classify_var(name, &ename, &k);
631: if (idx != GLOBAL_INDEX) {
632: Parse_Error(PARSE_FATAL,
633: "Trying to delete dynamic variable $%s", varnames[idx]);
634: return;
635: }
1.62 espie 636: slot = ohash_lookup_interval(&global_variables, name, ename, k);
637: v = ohash_find(&global_variables, slot);
638:
639: if (v == NULL)
640: return;
1.66 espie 641:
1.62 espie 642: if (checkEnvFirst && (v->flags & VAR_FROM_ENV))
643: return;
1.1 deraadt 644:
1.62 espie 645: if (v->flags & VAR_FROM_CMD)
646: return;
1.37 espie 647:
1.62 espie 648: ohash_remove(&global_variables, slot);
1.66 espie 649: delete_var(v);
1.1 deraadt 650: }
651:
1.66 espie 652: /* Set or add a global variable, in VAR_CMD or VAR_GLOBAL context.
653: */
1.62 espie 654: static void
655: var_set_append(const char *name, const char *ename, const char *val, int ctxt,
656: bool append)
1.1 deraadt 657: {
1.66 espie 658: Var *v;
659: uint32_t k;
660: int idx;
1.53 espie 661:
1.66 espie 662: idx = classify_var(name, &ename, &k);
663: if (idx != GLOBAL_INDEX) {
1.62 espie 664: Parse_Error(PARSE_FATAL, "Trying to %s dynamic variable $%s",
665: append ? "append to" : "set", varnames[idx]);
666: return;
667: }
1.53 espie 668:
1.62 espie 669: v = find_global_var(name, ename, k);
670: if (v->flags & POISON_NORMAL)
671: Parse_Error(PARSE_FATAL, "Trying to %s poisoned variable %s\n",
672: append ? "append to" : "set", v->name);
673: /* so can we write to it ? */
1.66 espie 674: if (ctxt == VAR_CMD) { /* always for command line */
675: (append ? var_append_value : var_set_value)(v, val);
1.62 espie 676: v->flags |= VAR_FROM_CMD;
677: if ((v->flags & VAR_SHELL) == 0) {
1.66 espie 678: /* Any variables given on the command line are
1.62 espie 679: * automatically exported to the environment,
1.66 espie 680: * except for SHELL (as per POSIX standard).
1.62 espie 681: */
682: esetenv(v->name, val);
1.66 espie 683: }
1.62 espie 684: if (DEBUG(VAR))
1.66 espie 685: printf("command:%s = %s\n", v->name, var_get_value(v));
1.62 espie 686: } else if ((v->flags & VAR_FROM_CMD) == 0 &&
687: (!checkEnvFirst || (v->flags & VAR_FROM_ENV) == 0)) {
1.66 espie 688: (append ? var_append_value : var_set_value)(v, val);
1.62 espie 689: if (DEBUG(VAR))
1.66 espie 690: printf("global:%s = %s\n", v->name, var_get_value(v));
1.62 espie 691: } else if (DEBUG(VAR))
1.66 espie 692: printf("overriden:%s = %s\n", v->name, var_get_value(v));
1.1 deraadt 693: }
694:
695: void
1.62 espie 696: Var_Seti(const char *name, const char *ename, const char *val, int ctxt)
1.1 deraadt 697: {
1.62 espie 698: var_set_append(name, ename, val, ctxt, false);
699: }
1.53 espie 700:
1.62 espie 701: void
702: Var_Appendi(const char *name, const char *ename, const char *val, int ctxt)
703: {
704: var_set_append(name, ename, val, ctxt, true);
705: }
1.53 espie 706:
1.66 espie 707: /* XXX different semantics for Var_Valuei() and Var_Definedi():
708: * references to poisoned value variables will error out in Var_Valuei(),
709: * but not in Var_Definedi(), so the following construct works:
710: * .poison BINDIR
711: * BINDIR ?= /usr/bin
712: */
1.53 espie 713: char *
1.59 espie 714: Var_Valuei(const char *name, const char *ename)
1.53 espie 715: {
1.66 espie 716: Var *v;
717: uint32_t k;
718: int idx;
1.62 espie 719:
1.66 espie 720: idx = classify_var(name, &ename, &k);
721: if (idx != GLOBAL_INDEX) {
722: Parse_Error(PARSE_FATAL,
723: "Trying to get value of dynamic variable $%s",
724: varnames[idx]);
725: return NULL;
1.62 espie 726: }
1.66 espie 727: v = find_global_var(name, ename, k);
728: if (v->flags & POISONS)
729: poison_check(v);
730: if ((v->flags & VAR_DUMMY) == 0)
731: return var_get_value(v);
732: else
733: return NULL;
1.53 espie 734: }
735:
1.62 espie 736: bool
737: Var_Definedi(const char *name, const char *ename)
738: {
1.66 espie 739: Var *v;
740: uint32_t k;
741: int idx;
1.62 espie 742:
1.66 espie 743: idx = classify_var(name, &ename, &k);
744: /* We don't bother writing an error message for dynamic variables,
745: * these will be caught when getting set later, usually.
746: */
747: if (idx == GLOBAL_INDEX) {
1.62 espie 748: v = find_global_var(name, ename, k);
749: if (v->flags & POISON_NORMAL)
1.66 espie 750: poison_check(v);
1.62 espie 751: if ((v->flags & VAR_DUMMY) == 0)
752: return true;
753: }
754: return false;
1.65 espie 755: }
756:
1.66 espie 757:
758: /***
759: *** Substitution functions, handling both global and dynamic variables.
760: ***/
761:
762:
763: /* XXX contrary to find_global_var(), find_any_var() can return NULL pointers.
764: */
1.65 espie 765: static Var *
1.66 espie 766: find_any_var(const char *name, const char *ename, SymTable *ctxt,
1.65 espie 767: int idx, uint32_t k)
768: {
1.66 espie 769: /* Handle local variables first */
770: if (idx != GLOBAL_INDEX) {
771: if (ctxt != NULL) {
772: if (idx < LOCAL_SIZE)
773: return ctxt->locals[idx];
774: else
775: return ctxt->locals[EXTENDED2SIMPLE(idx)];
776: } else
777: return NULL;
778: } else {
779: return find_global_var(name, ename, k);
780: }
1.62 espie 781: }
782:
1.66 espie 783: /* All the scanning functions needed to account for all the forms of
784: * variable names that exist:
785: * $A, ${AB}, $(ABC), ${A:mod}, $(A:mod)
786: */
1.53 espie 787:
788: static const char *
1.59 espie 789: find_rparen(const char *p)
1.53 espie 790: {
791: while (*p != '$' && *p != '\0' && *p != ')' && *p != ':')
792: p++;
793: return p;
794: }
1.1 deraadt 795:
1.53 espie 796: static const char *
1.59 espie 797: find_ket(const char *p)
1.53 espie 798: {
799: while (*p != '$' && *p != '\0' && *p != '}' && *p != ':')
800: p++;
801: return p;
802: }
1.1 deraadt 803:
1.66 espie 804: /* Figure out what kind of name we're looking for from a start character.
805: */
1.53 espie 806: static find_t
1.59 espie 807: find_pos(int c)
1.53 espie 808: {
809: switch(c) {
1.66 espie 810: case '(':
1.53 espie 811: return find_rparen;
1.66 espie 812: case '{':
1.53 espie 813: return find_ket;
814: default:
1.66 espie 815: Parse_Error(PARSE_FATAL,
816: "Wrong character in variable spec %c (can't happen)");
817: return find_rparen;
1.53 espie 818: }
1.1 deraadt 819: }
820:
1.68 ! espie 821: bool
! 822: Var_ParseSkip(const char **pstr, SymTable *ctxt)
1.1 deraadt 823: {
1.68 ! espie 824: const char *tstr;
! 825: Var *v;
! 826: char paren;
! 827: const char *str = *pstr;
1.66 espie 828: const char *start;
829: size_t length;
830: struct Name name;
1.68 ! espie 831: bool result;
1.66 espie 832:
833: v = NULL;
834: start = str;
1.53 espie 835: str++;
836:
1.66 espie 837: if (*str != '(' && *str != '{') {
838: name.tofree = false;
839: tstr = str + 1;
840: length = 2;
841: paren = '\0';
842: } else {
843: paren = *str;
844: str++;
845:
846: /* Find eventual modifiers in the variable */
847: tstr = VarName_Get(str, &name, ctxt, false, find_pos(paren));
848: VarName_Free(&name);
849: length = tstr - start;
850: if (*tstr != 0)
851: length++;
852: }
853:
1.68 ! espie 854: result = true;
1.66 espie 855: if (*tstr == ':' && paren != '\0')
856: if (VarModifiers_Apply(NULL, NULL, ctxt, true, NULL, tstr,
857: paren, &length) == var_Error)
1.68 ! espie 858: result = false;
! 859: *pstr += length;
! 860: return result;
1.1 deraadt 861: }
862:
1.55 espie 863: /* As of now, Var_ParseBuffer is just a wrapper around Var_Parse. For
864: * speed, it may be better to revisit the implementation to do things
865: * directly. */
866: bool
1.66 espie 867: Var_ParseBuffer(Buffer buf, const char *str, SymTable *ctxt, bool err,
1.59 espie 868: size_t *lengthPtr)
1.53 espie 869: {
1.66 espie 870: char *result;
871: bool freeIt;
1.45 espie 872:
1.66 espie 873: result = Var_Parse(str, ctxt, err, lengthPtr, &freeIt);
874: if (result == var_Error)
875: return false;
876:
877: Buf_AddString(buf, result);
878: if (freeIt)
879: free(result);
880: return true;
1.45 espie 881: }
882:
1.1 deraadt 883: char *
1.66 espie 884: Var_Parse(const char *str, /* The string to parse */
885: SymTable *ctxt, /* The context for the variable */
886: bool err, /* true if undefined variables are an error */
887: size_t *lengthPtr, /* OUT: The length of the specification */
1.59 espie 888: bool *freePtr) /* OUT: true if caller should free result */
1.44 espie 889: {
1.66 espie 890: const char *tstr; /* Pointer into str */
891: Var *v; /* Variable in invocation */
892: char paren; /* Parenthesis or brace or nothing */
893: struct Name name;
894: const char *start;
895: char *val; /* Variable value */
896: uint32_t k;
897: int idx;
898:
899: *freePtr = false;
900: start = str++;
901:
902: val = NULL;
903: v = NULL;
904: idx = GLOBAL_INDEX;
905:
906: if (*str != '(' && *str != '{') {
907: name.s = str;
908: name.e = str+1;
909: name.tofree = false;
910: tstr = str + 1;
911: *lengthPtr = 2;
912: paren = '\0';
913: } else {
914: paren = *str;
915: str++;
916:
917: /* Find eventual modifiers in the variable */
918: tstr = VarName_Get(str, &name, ctxt, false, find_pos(paren));
919: *lengthPtr = tstr - start;
920: if (*tstr != '\0')
921: (*lengthPtr)++;
922: }
1.5 millert 923:
1.66 espie 924: idx = classify_var(name.s, &name.e, &k);
925: v = find_any_var(name.s, name.e, ctxt, idx, k);
926: if (v != NULL && (v->flags & POISONS) != 0)
927: poison_check(v);
928: if (v != NULL && (v->flags & VAR_DUMMY) == 0) {
929: if (v->flags & VAR_IN_USE)
930: Fatal("Variable %s is recursive.", v->name);
931: /*NOTREACHED*/
932: else
933: v->flags |= VAR_IN_USE;
1.53 espie 934:
1.66 espie 935: /* Before doing any modification, we have to make sure the
936: * value has been fully expanded. If it looks like recursion
937: * might be necessary (there's a dollar sign somewhere in
938: * the variable's value) we just call Var_Subst to do any
939: * other substitutions that are necessary. Note that the
940: * value returned by Var_Subst will have been dynamically
941: * allocated, so it will need freeing when we return.
942: */
943: val = var_get_value(v);
944: if (idx == GLOBAL_INDEX) {
945: if (strchr(val, '$') != NULL) {
946: val = Var_Subst(val, ctxt, err);
947: *freePtr = true;
948: }
949: } else if (idx >= LOCAL_SIZE) {
950: if (IS_EXTENDED_F(idx))
951: val = Var_GetTail(val);
952: else
953: val = Var_GetHead(val);
954: *freePtr = true;
955: }
956: v->flags &= ~VAR_IN_USE;
957: }
958: if (*tstr == ':' && paren != '\0')
959: val = VarModifiers_Apply(val, &name, ctxt, err, freePtr,
960: tstr, paren, lengthPtr);
961: if (val == NULL) {
962: val = err ? var_Error : varNoError;
963: /* Dynamic source */
964: if (idx != GLOBAL_INDEX) {
965: /* can't be expanded for now: copy the spec instead. */
966: if (ctxt == NULL) {
967: *freePtr = true;
968: val = Str_dupi(start, start+ *lengthPtr);
969: } else {
970: /* somehow, this should have been expanded already. */
971: GNode *n;
972:
973: /* XXX */
974: n = (GNode *)(((char *)ctxt) -
975: offsetof(GNode, context));
976: if (idx >= LOCAL_SIZE)
977: idx = EXTENDED2SIMPLE(idx);
978: switch(idx) {
979: case IMPSRC_INDEX:
980: Fatal(
981: "Using $< in a non-suffix rule context is a GNUmake idiom (line %lu of %s)",
982: n->lineno, n->fname);
983: default:
984: Error(
985: "Using undefined dynamic variable $%s (line %lu of %s)",
986: varnames[idx], n->lineno, n->fname);
987: break;
988: }
989: }
1.53 espie 990: }
991: }
1.66 espie 992: VarName_Free(&name);
993: return val;
1.42 espie 994: }
995:
1.66 espie 996:
1.1 deraadt 997: char *
1.66 espie 998: Var_Subst(const char *str, /* the string in which to substitute */
999: SymTable *ctxt, /* the context wherein to find variables */
1.59 espie 1000: bool undefErr) /* true if undefineds are an error */
1001: {
1.66 espie 1002: BUFFER buf; /* Buffer for forming things */
1003: static bool errorReported;
1004:
1005: Buf_Init(&buf, MAKE_BSIZE);
1006: errorReported = false;
1007:
1008: for (;;) {
1009: char *val; /* Value to substitute for a variable */
1010: size_t length; /* Length of the variable invocation */
1011: bool doFree; /* Set true if val should be freed */
1012: const char *cp;
1013:
1014: /* copy uninteresting stuff */
1015: for (cp = str; *str != '\0' && *str != '$'; str++)
1016: ;
1017: Buf_Addi(&buf, cp, str);
1018: if (*str == '\0')
1019: break;
1020: if (str[1] == '$') {
1021: /* A $ may be escaped with another $. */
1022: Buf_AddChar(&buf, '$');
1023: str += 2;
1024: continue;
1025: }
1026: val = Var_Parse(str, ctxt, undefErr, &length, &doFree);
1027: /* When we come down here, val should either point to the
1028: * value of this variable, suitably modified, or be NULL.
1029: * Length should be the total length of the potential
1030: * variable invocation (from $ to end character...) */
1031: if (val == var_Error || val == varNoError) {
1032: /* If errors are not an issue, skip over the variable
1033: * and continue with the substitution. Otherwise, store
1034: * the dollar sign and advance str so we continue with
1035: * the string... */
1036: if (errorIsOkay)
1037: str += length;
1038: else if (undefErr) {
1039: /* If variable is undefined, complain and
1040: * skip the variable name. The complaint
1041: * will stop us from doing anything when
1042: * the file is parsed. */
1043: if (!errorReported)
1044: Parse_Error(PARSE_FATAL,
1045: "Undefined variable \"%.*s\"",
1046: length, str);
1047: str += length;
1048: errorReported = true;
1049: } else {
1050: Buf_AddChar(&buf, *str);
1051: str++;
1052: }
1053: } else {
1054: /* We've now got a variable structure to store in.
1055: * But first, advance the string pointer. */
1056: str += length;
1057:
1058: /* Copy all the characters from the variable value
1059: * straight into the new string. */
1060: Buf_AddString(&buf, val);
1061: if (doFree)
1062: free(val);
1063: }
1.24 espie 1064: }
1.66 espie 1065: return Buf_Retrieve(&buf);
1066: }
1067:
1068:
1069: /***
1070: *** Supplementary support for .for loops.
1071: ***/
1072:
1073:
1074:
1075: struct LoopVar
1076: {
1077: Var old; /* keep old variable value (before the loop) */
1078: Var *me; /* the variable we're dealing with */
1079: };
1080:
1081:
1082: struct LoopVar *
1083: Var_NewLoopVar(const char *name, const char *ename)
1084: {
1085: struct LoopVar *l;
1086: uint32_t k;
1087:
1088: l = emalloc(sizeof(struct LoopVar));
1089:
1090: /* we obtain a new variable quickly, make a snapshot of its old
1091: * value, and make sure the environment cannot touch us.
1092: */
1093: /* XXX: should we avoid dynamic variables ? */
1094: k = ohash_interval(name, &ename);
1095:
1096: l->me = find_global_var_without_env(name, ename, k);
1097: l->old = *(l->me);
1.67 espie 1098: l->me->flags = VAR_SEEN_ENV | VAR_DUMMY;
1.66 espie 1099: return l;
1100: }
1101:
1102: void
1103: Var_DeleteLoopVar(struct LoopVar *l)
1104: {
1.67 espie 1105: if ((l->me->flags & VAR_DUMMY) == 0)
1106: Buf_Destroy(&(l->me->val));
1.66 espie 1107: *(l->me) = l->old;
1108: free(l);
1.24 espie 1109: }
1.1 deraadt 1110:
1.53 espie 1111: void
1.66 espie 1112: Var_SubstVar(Buffer buf, /* To store result */
1113: const char *str, /* The string in which to substitute */
1114: struct LoopVar *l, /* Handle */
1.59 espie 1115: const char *val) /* Its value */
1.24 espie 1116: {
1.66 espie 1117: const char *var = l->me->name;
1.24 espie 1118:
1.66 espie 1119: var_set_value(l->me, val);
1.53 espie 1120:
1.66 espie 1121: for (;;) {
1122: const char *start;
1123: /* Copy uninteresting stuff */
1124: for (start = str; *str != '\0' && *str != '$'; str++)
1125: ;
1126: Buf_Addi(buf, start, str);
1127:
1128: start = str;
1129: if (*str++ == '\0')
1130: break;
1131: str++;
1132: /* and escaped dollars */
1133: if (start[1] == '$') {
1134: Buf_Addi(buf, start, start+2);
1135: continue;
1136: }
1137: /* Simple variable, if it's not us, copy. */
1138: if (start[1] != '(' && start[1] != '{') {
1139: if (start[1] != *var || var[1] != '\0') {
1140: Buf_AddChars(buf, 2, start);
1141: continue;
1142: }
1143: } else {
1144: const char *p;
1145: char paren = start[1];
1146:
1147:
1148: /* Find the end of the variable specification. */
1149: p = find_pos(paren)(str);
1150: /* A variable inside the variable. We don't know how to
1151: * expand the external variable at this point, so we
1152: * try again with the nested variable. */
1153: if (*p == '$') {
1154: Buf_Addi(buf, start, p);
1155: str = p;
1156: continue;
1157: }
1158:
1159: if (strncmp(var, str, p - str) != 0 ||
1160: var[p - str] != '\0') {
1161: /* Not the variable we want to expand. */
1162: Buf_Addi(buf, start, p);
1163: str = p;
1164: continue;
1165: }
1166: if (*p == ':') {
1167: size_t length; /* Length of variable name */
1168: bool doFree; /* should val be freed ? */
1169: char *newval;
1170: struct Name name;
1171:
1172: length = p - str + 1;
1173: doFree = false;
1174: name.s = var;
1175: name.e = var + (p-str);
1176:
1177: /* val won't be freed since !doFree, but
1178: * VarModifiers_Apply doesn't know that,
1179: * hence the cast. */
1180: newval = VarModifiers_Apply((char *)val, &name,
1181: NULL, false, &doFree, p, paren, &length);
1182: Buf_AddString(buf, newval);
1183: if (doFree)
1184: free(newval);
1185: str += length;
1186: continue;
1187: } else
1188: str = p+1;
1189: }
1190: Buf_AddString(buf, val);
1191: }
1192: }
1.1 deraadt 1193:
1.66 espie 1194: /***
1195: *** Odds and ends
1196: ***/
1.1 deraadt 1197:
1.62 espie 1198: static void
1199: set_magic_shell_variable()
1200: {
1.66 espie 1201: const char *name = "SHELL";
1202: const char *ename = NULL;
1203: uint32_t k;
1204: Var *v;
1205:
1206: k = ohash_interval(name, &ename);
1207: v = find_global_var_without_env(name, ename, k);
1208: var_set_value(v, _PATH_BSHELL);
1209: /* XXX the environment shall never affect it */
1210: v->flags = VAR_SHELL | VAR_SEEN_ENV;
1211: }
1212:
1213: /*
1214: * Var_Init
1.1 deraadt 1215: * Initialize the module
1216: */
1217: void
1.59 espie 1218: Var_Init(void)
1.1 deraadt 1219: {
1.66 espie 1220: ohash_init(&global_variables, 10, &var_info);
1221: set_magic_shell_variable();
1.35 espie 1222:
1.62 espie 1223:
1.66 espie 1224: errorIsOkay = true;
1225: Var_setCheckEnvFirst(false);
1.53 espie 1226:
1.66 espie 1227: VarModifiers_Init();
1.1 deraadt 1228: }
1229:
1230:
1.55 espie 1231: #ifdef CLEANUP
1.1 deraadt 1232: void
1.59 espie 1233: Var_End(void)
1.1 deraadt 1234: {
1.66 espie 1235: Var *v;
1236: unsigned int i;
1.38 espie 1237:
1.66 espie 1238: for (v = ohash_first(&global_variables, &i); v != NULL;
1239: v = ohash_next(&global_variables, &i))
1240: delete_var(v);
1.55 espie 1241: }
1.37 espie 1242: #endif
1.5 millert 1243:
1.53 espie 1244: static const char *interpret(int);
1245:
1246: static const char *
1.59 espie 1247: interpret(int f)
1.53 espie 1248: {
1.66 espie 1249: if (f & VAR_DUMMY)
1250: return "(D)";
1251: return "";
1.53 espie 1252: }
1253:
1.1 deraadt 1254:
1.31 espie 1255: static void
1.66 espie 1256: print_var(Var *v)
1.1 deraadt 1257: {
1.66 espie 1258: printf("%-16s%s = %s\n", v->name, interpret(v->flags),
1259: (v->flags & VAR_DUMMY) == 0 ? var_get_value(v) : "(none)");
1.1 deraadt 1260: }
1261:
1262: void
1.59 espie 1263: Var_Dump(void)
1.1 deraadt 1264: {
1.66 espie 1265: Var *v;
1266: unsigned int i;
1.53 espie 1267:
1.66 espie 1268: printf("#*** Global Variables:\n");
1.37 espie 1269:
1.66 espie 1270: for (v = ohash_first(&global_variables, &i); v != NULL;
1271: v = ohash_next(&global_variables, &i))
1272: print_var(v);
1.53 espie 1273: }
1.46 espie 1274:
1275: static const char *quotable = " \t\n\\'\"";
1276:
1.66 espie 1277: /* POSIX says that variable assignments passed on the command line should be
1.46 espie 1278: * propagated to sub makes through MAKEFLAGS.
1279: */
1280: void
1.59 espie 1281: Var_AddCmdline(const char *name)
1.46 espie 1282: {
1.66 espie 1283: Var *v;
1284: unsigned int i;
1285: BUFFER buf;
1286: char *s;
1287:
1288: Buf_Init(&buf, MAKE_BSIZE);
1289:
1290: for (v = ohash_first(&global_variables, &i); v != NULL;
1291: v = ohash_next(&global_variables, &i)) {
1292: /* This is not as expensive as it looks: this function is
1293: * called before parsing Makefiles, so there are just a
1294: * few non cmdling variables in there.
1295: */
1.62 espie 1296: if (!(v->flags & VAR_FROM_CMD)) {
1297: continue;
1298: }
1.46 espie 1299: /* We assume variable names don't need quoting */
1300: Buf_AddString(&buf, v->name);
1301: Buf_AddChar(&buf, '=');
1.66 espie 1302: for (s = var_get_value(v); *s != '\0'; s++) {
1.46 espie 1303: if (strchr(quotable, *s))
1304: Buf_AddChar(&buf, '\\');
1305: Buf_AddChar(&buf, *s);
1306: }
1307: Buf_AddSpace(&buf);
1.66 espie 1308: }
1309: Var_Append(name, Buf_Retrieve(&buf), VAR_GLOBAL);
1310: Buf_Destroy(&buf);
1.46 espie 1311: }
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