Annotation of src/usr.bin/make/var.c, Revision 1.86
1.53 espie 1: /* $OpenPackages$ */
1.85 espie 2: /* $OpenBSD$ */
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[] = "";
1.78 espie 101: bool errorIsOkay;
1.66 espie 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 */
1.79 espie 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 *);
1.62 espie 208: static Var *find_global_var(const char *, const char *, uint32_t);
1.66 espie 209: static Var *find_global_var_without_env(const char *, const char *, uint32_t);
1.62 espie 210: static void fill_from_env(Var *);
1.53 espie 211: static Var *create_var(const char *, const char *);
1.66 espie 212: static void var_set_initial_value(Var *, const char *);
213: static void var_set_value(Var *, const char *);
214: #define var_get_value(v) Buf_Retrieve(&((v)->val))
215: static void var_append_value(Var *, const char *);
216: static void poison_check(Var *);
1.62 espie 217: static void var_set_append(const char *, const char *, const char *, int, bool);
218: static void set_magic_shell_variable(void);
1.66 espie 219:
220: static void delete_var(Var *);
221: static void print_var(Var *);
222:
223:
1.53 espie 224: static const char *find_rparen(const char *);
225: static const char *find_ket(const char *);
226: typedef const char * (*find_t)(const char *);
227: static find_t find_pos(int);
1.69 espie 228: static void push_used(Var *);
229: static void pop_used(Var *);
1.83 espie 230: static char *get_expanded_value(const char *, const char *, int, uint32_t,
231: SymTable *, bool, bool *);
1.72 espie 232: static bool parse_base_variable_name(const char **, struct Name *, SymTable *);
1.53 espie 233:
1.66 espie 234:
235:
236: /* Variable lookup function: return idx for dynamic variable, or
237: * GLOBAL_INDEX if name is not dynamic. Set up *pk for further use.
238: */
1.38 espie 239: static int
1.66 espie 240: classify_var(const char *name, const char **enamePtr, uint32_t *pk)
1.38 espie 241: {
1.66 espie 242: size_t len;
1.38 espie 243:
1.66 espie 244: *pk = ohash_interval(name, enamePtr);
245: len = *enamePtr - name;
246: /* substitute short version for long local name */
247: switch (*pk % MAGICSLOTS1) { /* MAGICSLOTS should be the */
248: case K_LONGALLSRC % MAGICSLOTS1:/* smallest constant yielding */
249: /* distinct case values */
250: if (*pk == K_LONGALLSRC && len == strlen(LONGALLSRC) &&
251: strncmp(name, LONGALLSRC, len) == 0)
252: return ALLSRC_INDEX;
253: break;
254: case K_LONGARCHIVE % MAGICSLOTS1:
255: if (*pk == K_LONGARCHIVE && len == strlen(LONGARCHIVE) &&
256: strncmp(name, LONGARCHIVE, len) == 0)
257: return ARCHIVE_INDEX;
258: break;
259: case K_LONGIMPSRC % MAGICSLOTS1:
260: if (*pk == K_LONGIMPSRC && len == strlen(LONGIMPSRC) &&
261: strncmp(name, LONGIMPSRC, len) == 0)
262: return IMPSRC_INDEX;
263: break;
264: case K_LONGMEMBER % MAGICSLOTS1:
265: if (*pk == K_LONGMEMBER && len == strlen(LONGMEMBER) &&
266: strncmp(name, LONGMEMBER, len) == 0)
267: return MEMBER_INDEX;
268: break;
269: case K_LONGOODATE % MAGICSLOTS1:
270: if (*pk == K_LONGOODATE && len == strlen(LONGOODATE) &&
271: strncmp(name, LONGOODATE, len) == 0)
272: return OODATE_INDEX;
273: break;
274: case K_LONGPREFIX % MAGICSLOTS1:
275: if (*pk == K_LONGPREFIX && len == strlen(LONGPREFIX) &&
276: strncmp(name, LONGPREFIX, len) == 0)
277: return PREFIX_INDEX;
278: break;
279: case K_LONGTARGET % MAGICSLOTS1:
280: if (*pk == K_LONGTARGET && len == strlen(LONGTARGET) &&
281: strncmp(name, LONGTARGET, len) == 0)
282: return TARGET_INDEX;
283: break;
284: case K_TARGET % MAGICSLOTS1:
285: if (name[0] == TARGET[0] && len == 1)
286: return TARGET_INDEX;
287: break;
288: case K_OODATE % MAGICSLOTS1:
289: if (name[0] == OODATE[0] && len == 1)
290: return OODATE_INDEX;
291: break;
292: case K_ALLSRC % MAGICSLOTS1:
293: if (name[0] == ALLSRC[0] && len == 1)
294: return ALLSRC_INDEX;
295: break;
296: case K_IMPSRC % MAGICSLOTS1:
297: if (name[0] == IMPSRC[0] && len == 1)
298: return IMPSRC_INDEX;
299: break;
300: case K_PREFIX % MAGICSLOTS1:
301: if (name[0] == PREFIX[0] && len == 1)
302: return PREFIX_INDEX;
303: break;
304: case K_ARCHIVE % MAGICSLOTS1:
305: if (name[0] == ARCHIVE[0] && len == 1)
306: return ARCHIVE_INDEX;
307: break;
308: case K_MEMBER % MAGICSLOTS1:
309: if (name[0] == MEMBER[0] && len == 1)
310: return MEMBER_INDEX;
311: break;
312: case K_FTARGET % MAGICSLOTS1:
313: if (name[0] == FTARGET[0] && name[1] == FTARGET[1] && len == 2)
314: return FTARGET_INDEX;
315: break;
316: case K_DTARGET % MAGICSLOTS1:
317: if (name[0] == DTARGET[0] && name[1] == DTARGET[1] && len == 2)
318: return DTARGET_INDEX;
319: break;
320: case K_FPREFIX % MAGICSLOTS1:
321: if (name[0] == FPREFIX[0] && name[1] == FPREFIX[1] && len == 2)
322: return FPREFIX_INDEX;
323: break;
324: case K_DPREFIX % MAGICSLOTS1:
325: if (name[0] == DPREFIX[0] && name[1] == DPREFIX[1] && len == 2)
326: return DPREFIX_INDEX;
327: break;
328: case K_FARCHIVE % MAGICSLOTS1:
329: if (name[0] == FARCHIVE[0] && name[1] == FARCHIVE[1] &&
330: len == 2)
331: return FARCHIVE_INDEX;
332: break;
333: case K_DARCHIVE % MAGICSLOTS1:
334: if (name[0] == DARCHIVE[0] && name[1] == DARCHIVE[1] &&
335: len == 2)
336: return DARCHIVE_INDEX;
337: break;
338: case K_FMEMBER % MAGICSLOTS1:
339: if (name[0] == FMEMBER[0] && name[1] == FMEMBER[1] && len == 2)
340: return FMEMBER_INDEX;
341: break;
342: case K_DMEMBER % MAGICSLOTS1:
343: if (name[0] == DMEMBER[0] && name[1] == DMEMBER[1] && len == 2)
344: return DMEMBER_INDEX;
345: break;
346: default:
347: break;
348: }
349: return GLOBAL_INDEX;
1.38 espie 350: }
1.37 espie 351:
1.66 espie 352:
353: /***
354: *** Internal handling of variables.
355: ***/
356:
357:
358: /* Create a new variable, does not initialize anything except the name.
359: * in particular, buffer is invalid, and flag value is invalid. Accordingly,
360: * must either:
361: * - set flags to VAR_DUMMY
362: * - set flags to !VAR_DUMMY, and initialize buffer, for instance with
363: * var_set_initial_value().
364: */
1.65 espie 365: static Var *
366: create_var(const char *name, const char *ename)
367: {
1.66 espie 368: return ohash_create_entry(&var_info, name, &ename);
1.65 espie 369: }
370:
1.66 espie 371: /* Initial version of var_set_value(), to be called after create_var().
372: */
1.65 espie 373: static void
1.66 espie 374: var_set_initial_value(Var *v, const char *val)
1.65 espie 375: {
1.66 espie 376: size_t len;
1.65 espie 377:
1.66 espie 378: len = strlen(val);
379: Buf_Init(&(v->val), len+1);
380: Buf_AddChars(&(v->val), len, val);
1.65 espie 381: }
382:
1.66 espie 383: /* Normal version of var_set_value(), to be called after variable is fully
384: * initialized.
385: */
1.65 espie 386: static void
1.66 espie 387: var_set_value(Var *v, const char *val)
1.65 espie 388: {
1.66 espie 389: if ((v->flags & VAR_DUMMY) == 0) {
390: Buf_Reset(&(v->val));
391: Buf_AddString(&(v->val), val);
392: } else {
393: var_set_initial_value(v, val);
394: v->flags &= ~VAR_DUMMY;
395: }
1.65 espie 396: }
397:
1.66 espie 398: /* Add to a variable, insert a separating space if the variable was already
399: * defined.
400: */
1.65 espie 401: static void
1.66 espie 402: var_append_value(Var *v, const char *val)
1.65 espie 403: {
1.66 espie 404: if ((v->flags & VAR_DUMMY) == 0) {
405: Buf_AddSpace(&(v->val));
406: Buf_AddString(&(v->val), val);
407: } else {
408: var_set_initial_value(v, val);
409: v->flags &= ~VAR_DUMMY;
410: }
411: }
412:
413:
414: /* Delete a variable and all the space associated with it.
1.65 espie 415: */
416: static void
1.66 espie 417: delete_var(Var *v)
1.65 espie 418: {
1.66 espie 419: if ((v->flags & VAR_DUMMY) == 0)
420: Buf_Destroy(&(v->val));
421: free(v);
1.65 espie 422: }
423:
424:
425:
1.66 espie 426:
427: /***
428: *** Dynamic variable handling.
429: ***/
430:
431:
432:
433: /* create empty symtable.
434: * XXX: to save space, dynamic variables may be NULL pointers.
435: */
1.65 espie 436: void
437: SymTable_Init(SymTable *ctxt)
438: {
1.80 espie 439: static SymTable sym_template;
1.66 espie 440: memcpy(ctxt, &sym_template, sizeof(*ctxt));
1.65 espie 441: }
442:
1.66 espie 443: /* free symtable.
444: */
1.65 espie 445: #ifdef CLEANUP
446: void
447: SymTable_Destroy(SymTable *ctxt)
448: {
1.66 espie 449: int i;
1.65 espie 450:
1.66 espie 451: for (i = 0; i < LOCAL_SIZE; i++)
452: if (ctxt->locals[i] != NULL)
453: delete_var(ctxt->locals[i]);
1.65 espie 454: }
455: #endif
456:
1.66 espie 457: /***
458: *** Global variable handling.
459: ***/
460:
461: /* Create a new global var if necessary, and set it up correctly.
462: * Do not take environment into account.
463: */
1.53 espie 464: static Var *
1.66 espie 465: find_global_var_without_env(const char *name, const char *ename, uint32_t k)
1.37 espie 466: {
1.65 espie 467: unsigned int slot;
468: Var *v;
1.1 deraadt 469:
1.65 espie 470: slot = ohash_lookup_interval(&global_variables, name, ename, k);
471: v = ohash_find(&global_variables, slot);
472: if (v == NULL) {
473: v = create_var(name, ename);
474: v->flags = VAR_DUMMY;
475: ohash_insert(&global_variables, slot, v);
476: }
477: return v;
1.35 espie 478: }
1.53 espie 479:
1.66 espie 480: /* Helper for find_global_var(): grab environment value if needed.
481: */
1.62 espie 482: static void
483: fill_from_env(Var *v)
1.37 espie 484: {
1.66 espie 485: char *env;
1.37 espie 486:
1.66 espie 487: env = getenv(v->name);
488: if (env == NULL)
489: v->flags |= VAR_SEEN_ENV;
490: else {
491: var_set_value(v, env);
492: v->flags |= VAR_FROM_ENV | VAR_SEEN_ENV;
493: }
1.37 espie 494:
1.53 espie 495: #ifdef STATS_VAR_LOOKUP
1.66 espie 496: STAT_VAR_FROM_ENV++;
1.53 espie 497: #endif
1.62 espie 498: }
1.37 espie 499:
1.66 espie 500: /* Find global var, and obtain its value from the environment if needed.
501: */
1.62 espie 502: static Var *
1.65 espie 503: find_global_var(const char *name, const char *ename, uint32_t k)
504: {
1.66 espie 505: Var *v;
1.65 espie 506:
1.66 espie 507: v = find_global_var_without_env(name, ename, k);
1.65 espie 508:
1.82 espie 509: if ((v->flags & VAR_SEEN_ENV) == 0)
510: if ((checkEnvFirst && (v->flags & VAR_FROM_CMD) == 0) ||
511: (v->flags & VAR_DUMMY) != 0)
512: fill_from_env(v);
1.65 espie 513:
1.66 espie 514: return v;
1.65 espie 515: }
516:
1.66 espie 517: /* mark variable as poisoned, in a given setup.
518: */
1.65 espie 519: void
520: Var_MarkPoisoned(const char *name, const char *ename, unsigned int type)
1.62 espie 521: {
1.65 espie 522: Var *v;
523: uint32_t k;
524: int idx;
1.66 espie 525: idx = classify_var(name, &ename, &k);
1.65 espie 526:
1.66 espie 527: if (idx != GLOBAL_INDEX) {
528: Parse_Error(PARSE_FATAL,
1.65 espie 529: "Trying to poison dynamic variable $%s",
530: varnames[idx]);
531: return;
532: }
1.62 espie 533:
1.65 espie 534: v = find_global_var(name, ename, k);
535: v->flags |= type;
1.66 espie 536: /* POISON_NORMAL is not lazy: if the variable already exists in
537: * the Makefile, then it's a mistake.
538: */
1.65 espie 539: if (v->flags & POISON_NORMAL) {
540: if (v->flags & VAR_DUMMY)
541: return;
542: if (v->flags & VAR_FROM_ENV)
543: return;
544: Parse_Error(PARSE_FATAL,
545: "Poisoned variable %s is already set\n", v->name);
1.62 espie 546: }
1.37 espie 547: }
548:
1.66 espie 549: /* Check if there's any reason not to use the variable in this context.
550: */
1.62 espie 551: static void
552: poison_check(Var *v)
1.1 deraadt 553: {
1.62 espie 554: if (v->flags & POISON_NORMAL) {
1.66 espie 555: Parse_Error(PARSE_FATAL,
1.62 espie 556: "Poisoned variable %s has been referenced\n", v->name);
557: return;
558: }
559: if (v->flags & VAR_DUMMY) {
560: Parse_Error(PARSE_FATAL,
561: "Poisoned variable %s is not defined\n", v->name);
562: return;
563: }
564: if (v->flags & POISON_EMPTY)
1.66 espie 565: if (strcmp(var_get_value(v), "") == 0)
566: Parse_Error(PARSE_FATAL,
1.62 espie 567: "Poisoned variable %s is empty\n", v->name);
1.37 espie 568: }
569:
1.66 espie 570: /* Delete global variable.
571: */
1.1 deraadt 572: void
1.66 espie 573: Var_Deletei(const char *name, const char *ename)
1.1 deraadt 574: {
1.66 espie 575: Var *v;
576: uint32_t k;
1.62 espie 577: unsigned int slot;
1.66 espie 578: int idx;
1.62 espie 579:
1.66 espie 580: idx = classify_var(name, &ename, &k);
581: if (idx != GLOBAL_INDEX) {
582: Parse_Error(PARSE_FATAL,
583: "Trying to delete dynamic variable $%s", varnames[idx]);
584: return;
585: }
1.62 espie 586: slot = ohash_lookup_interval(&global_variables, name, ename, k);
587: v = ohash_find(&global_variables, slot);
1.80 espie 588:
1.62 espie 589: if (v == NULL)
590: return;
1.66 espie 591:
1.62 espie 592: if (checkEnvFirst && (v->flags & VAR_FROM_ENV))
593: return;
1.1 deraadt 594:
1.62 espie 595: if (v->flags & VAR_FROM_CMD)
596: return;
1.37 espie 597:
1.62 espie 598: ohash_remove(&global_variables, slot);
1.66 espie 599: delete_var(v);
1.1 deraadt 600: }
601:
1.66 espie 602: /* Set or add a global variable, in VAR_CMD or VAR_GLOBAL context.
603: */
1.62 espie 604: static void
605: var_set_append(const char *name, const char *ename, const char *val, int ctxt,
606: bool append)
1.1 deraadt 607: {
1.66 espie 608: Var *v;
609: uint32_t k;
610: int idx;
1.53 espie 611:
1.66 espie 612: idx = classify_var(name, &ename, &k);
613: if (idx != GLOBAL_INDEX) {
1.62 espie 614: Parse_Error(PARSE_FATAL, "Trying to %s dynamic variable $%s",
615: append ? "append to" : "set", varnames[idx]);
616: return;
617: }
1.53 espie 618:
1.62 espie 619: v = find_global_var(name, ename, k);
620: if (v->flags & POISON_NORMAL)
621: Parse_Error(PARSE_FATAL, "Trying to %s poisoned variable %s\n",
622: append ? "append to" : "set", v->name);
623: /* so can we write to it ? */
1.66 espie 624: if (ctxt == VAR_CMD) { /* always for command line */
625: (append ? var_append_value : var_set_value)(v, val);
1.62 espie 626: v->flags |= VAR_FROM_CMD;
627: if ((v->flags & VAR_SHELL) == 0) {
1.66 espie 628: /* Any variables given on the command line are
1.62 espie 629: * automatically exported to the environment,
1.66 espie 630: * except for SHELL (as per POSIX standard).
1.62 espie 631: */
632: esetenv(v->name, val);
1.66 espie 633: }
1.62 espie 634: if (DEBUG(VAR))
1.66 espie 635: printf("command:%s = %s\n", v->name, var_get_value(v));
1.62 espie 636: } else if ((v->flags & VAR_FROM_CMD) == 0 &&
637: (!checkEnvFirst || (v->flags & VAR_FROM_ENV) == 0)) {
1.66 espie 638: (append ? var_append_value : var_set_value)(v, val);
1.62 espie 639: if (DEBUG(VAR))
1.66 espie 640: printf("global:%s = %s\n", v->name, var_get_value(v));
1.62 espie 641: } else if (DEBUG(VAR))
1.84 tobias 642: printf("overridden:%s = %s\n", v->name, var_get_value(v));
1.1 deraadt 643: }
644:
645: void
1.77 espie 646: Var_Seti_with_ctxt(const char *name, const char *ename, const char *val,
1.73 espie 647: int ctxt)
1.1 deraadt 648: {
1.62 espie 649: var_set_append(name, ename, val, ctxt, false);
650: }
1.53 espie 651:
1.62 espie 652: void
1.77 espie 653: Var_Appendi_with_ctxt(const char *name, const char *ename, const char *val,
1.73 espie 654: int ctxt)
1.62 espie 655: {
656: var_set_append(name, ename, val, ctxt, true);
657: }
1.53 espie 658:
1.66 espie 659: /* XXX different semantics for Var_Valuei() and Var_Definedi():
660: * references to poisoned value variables will error out in Var_Valuei(),
661: * but not in Var_Definedi(), so the following construct works:
662: * .poison BINDIR
663: * BINDIR ?= /usr/bin
664: */
1.53 espie 665: char *
1.59 espie 666: Var_Valuei(const char *name, const char *ename)
1.53 espie 667: {
1.66 espie 668: Var *v;
669: uint32_t k;
670: int idx;
1.62 espie 671:
1.66 espie 672: idx = classify_var(name, &ename, &k);
673: if (idx != GLOBAL_INDEX) {
674: Parse_Error(PARSE_FATAL,
675: "Trying to get value of dynamic variable $%s",
676: varnames[idx]);
677: return NULL;
1.62 espie 678: }
1.66 espie 679: v = find_global_var(name, ename, k);
680: if (v->flags & POISONS)
681: poison_check(v);
682: if ((v->flags & VAR_DUMMY) == 0)
683: return var_get_value(v);
684: else
685: return NULL;
1.53 espie 686: }
687:
1.62 espie 688: bool
689: Var_Definedi(const char *name, const char *ename)
690: {
1.66 espie 691: Var *v;
692: uint32_t k;
693: int idx;
1.62 espie 694:
1.66 espie 695: idx = classify_var(name, &ename, &k);
696: /* We don't bother writing an error message for dynamic variables,
697: * these will be caught when getting set later, usually.
698: */
699: if (idx == GLOBAL_INDEX) {
1.62 espie 700: v = find_global_var(name, ename, k);
701: if (v->flags & POISON_NORMAL)
1.66 espie 702: poison_check(v);
1.62 espie 703: if ((v->flags & VAR_DUMMY) == 0)
704: return true;
705: }
706: return false;
1.65 espie 707: }
708:
1.66 espie 709:
710: /***
711: *** Substitution functions, handling both global and dynamic variables.
712: ***/
713:
714:
715: /* All the scanning functions needed to account for all the forms of
716: * variable names that exist:
717: * $A, ${AB}, $(ABC), ${A:mod}, $(A:mod)
718: */
1.53 espie 719:
720: static const char *
1.59 espie 721: find_rparen(const char *p)
1.53 espie 722: {
723: while (*p != '$' && *p != '\0' && *p != ')' && *p != ':')
724: p++;
725: return p;
726: }
1.1 deraadt 727:
1.53 espie 728: static const char *
1.59 espie 729: find_ket(const char *p)
1.53 espie 730: {
731: while (*p != '$' && *p != '\0' && *p != '}' && *p != ':')
732: p++;
733: return p;
734: }
1.1 deraadt 735:
1.66 espie 736: /* Figure out what kind of name we're looking for from a start character.
737: */
1.53 espie 738: static find_t
1.59 espie 739: find_pos(int c)
1.53 espie 740: {
741: switch(c) {
1.66 espie 742: case '(':
1.53 espie 743: return find_rparen;
1.66 espie 744: case '{':
1.53 espie 745: return find_ket;
746: default:
1.66 espie 747: Parse_Error(PARSE_FATAL,
748: "Wrong character in variable spec %c (can't happen)");
749: return find_rparen;
1.53 espie 750: }
1.1 deraadt 751: }
752:
1.77 espie 753: static bool
1.72 espie 754: parse_base_variable_name(const char **pstr, struct Name *name, SymTable *ctxt)
1.1 deraadt 755: {
1.72 espie 756: const char *str = *pstr;
1.68 espie 757: const char *tstr;
1.70 espie 758: bool has_modifier = false;
1.66 espie 759:
1.70 espie 760: switch(str[1]) {
761: case '(':
762: case '{':
1.66 espie 763: /* Find eventual modifiers in the variable */
1.72 espie 764: tstr = VarName_Get(str+2, name, ctxt, false, find_pos(str[1]));
1.70 espie 765: if (*tstr == ':')
766: has_modifier = true;
767: else if (*tstr != '\0') {
768: tstr++;
769: }
770: break;
771: default:
1.72 espie 772: name->s = str+1;
773: name->e = str+2;
774: name->tofree = false;
1.70 espie 775: tstr = str + 2;
776: break;
1.66 espie 777: }
1.72 espie 778: *pstr = tstr;
779: return has_modifier;
780: }
781:
782: bool
783: Var_ParseSkip(const char **pstr, SymTable *ctxt)
784: {
785: const char *str = *pstr;
786: struct Name name;
787: bool result;
788: bool has_modifier;
789: const char *tstr = str;
1.80 espie 790:
1.72 espie 791: has_modifier = parse_base_variable_name(&tstr, &name, ctxt);
792: VarName_Free(&name);
1.68 espie 793: result = true;
1.70 espie 794: if (has_modifier)
795: if (VarModifiers_Apply(NULL, NULL, ctxt, true, NULL, &tstr,
796: str[1]) == var_Error)
1.68 espie 797: result = false;
1.70 espie 798: *pstr = tstr;
1.68 espie 799: return result;
1.1 deraadt 800: }
801:
1.55 espie 802: /* As of now, Var_ParseBuffer is just a wrapper around Var_Parse. For
803: * speed, it may be better to revisit the implementation to do things
804: * directly. */
805: bool
1.66 espie 806: Var_ParseBuffer(Buffer buf, const char *str, SymTable *ctxt, bool err,
1.59 espie 807: size_t *lengthPtr)
1.53 espie 808: {
1.66 espie 809: char *result;
810: bool freeIt;
1.45 espie 811:
1.66 espie 812: result = Var_Parse(str, ctxt, err, lengthPtr, &freeIt);
813: if (result == var_Error)
814: return false;
815:
816: Buf_AddString(buf, result);
817: if (freeIt)
818: free(result);
819: return true;
1.45 espie 820: }
821:
1.69 espie 822: /* Helper function for Var_Parse: still recursive, but we tag what variables
823: * we expand for better error messages.
824: */
825: #define MAX_DEPTH 350
826: static Var *call_trace[MAX_DEPTH];
827: static int current_depth = 0;
828:
1.77 espie 829: static void
1.69 espie 830: push_used(Var *v)
831: {
832: if (v->flags & VAR_IN_USE) {
833: int i;
834: fprintf(stderr, "Problem with variable expansion chain: ");
1.77 espie 835: for (i = 0;
836: i < (current_depth > MAX_DEPTH ? MAX_DEPTH : current_depth);
1.69 espie 837: i++)
838: fprintf(stderr, "%s -> ", call_trace[i]->name);
839: fprintf(stderr, "%s\n", v->name);
840: Fatal("\tVariable %s is recursive.", v->name);
841: /*NOTREACHED*/
842: }
843:
844: v->flags |= VAR_IN_USE;
845: if (current_depth < MAX_DEPTH)
846: call_trace[current_depth] = v;
847: current_depth++;
848: }
849:
850: static void
851: pop_used(Var *v)
852: {
853: v->flags &= ~VAR_IN_USE;
854: current_depth--;
855: }
856:
857: static char *
1.86 ! espie 858: get_expanded_value(const char *name, const char *ename, int idx, uint32_t k,
1.83 espie 859: SymTable *ctxt, bool err, bool *freePtr)
1.69 espie 860: {
861: char *val;
862:
863: /* Before doing any modification, we have to make sure the
864: * value has been fully expanded. If it looks like recursion
865: * might be necessary (there's a dollar sign somewhere in
866: * the variable's value) we just call Var_Subst to do any
867: * other substitutions that are necessary. Note that the
868: * value returned by Var_Subst will have been dynamically
869: * allocated, so it will need freeing when we return.
870: */
871: if (idx == GLOBAL_INDEX) {
1.83 espie 872: Var *v = find_global_var(name, ename, k);
873:
874: if (v == NULL)
875: return NULL;
876:
877: if ((v->flags & POISONS) != 0)
878: poison_check(v);
879: if ((v->flags & VAR_DUMMY) != 0)
880: return NULL;
881:
882: val = var_get_value(v);
1.69 espie 883: if (strchr(val, '$') != NULL) {
884: push_used(v);
885: val = Var_Subst(val, ctxt, err);
886: pop_used(v);
887: *freePtr = true;
888: }
1.83 espie 889: } else {
890: if (ctxt != NULL) {
891: if (idx < LOCAL_SIZE)
892: val = ctxt->locals[idx];
893: else
894: val = ctxt->locals[EXTENDED2SIMPLE(idx)];
895: } else
896: val = NULL;
897: if (val == NULL)
898: return NULL;
899:
900: if (idx >= LOCAL_SIZE) {
901: if (IS_EXTENDED_F(idx))
902: val = Var_GetTail(val);
903: else
904: val = Var_GetHead(val);
905: *freePtr = true;
906: }
1.69 espie 907: }
908: return val;
909: }
910:
1.1 deraadt 911: char *
1.66 espie 912: Var_Parse(const char *str, /* The string to parse */
913: SymTable *ctxt, /* The context for the variable */
914: bool err, /* true if undefined variables are an error */
915: size_t *lengthPtr, /* OUT: The length of the specification */
1.59 espie 916: bool *freePtr) /* OUT: true if caller should free result */
1.44 espie 917: {
1.70 espie 918: const char *tstr;
1.66 espie 919: struct Name name;
1.70 espie 920: char *val;
1.66 espie 921: uint32_t k;
922: int idx;
1.72 espie 923: bool has_modifier;
1.66 espie 924:
925: *freePtr = false;
926:
1.72 espie 927: tstr = str;
928:
929: has_modifier = parse_base_variable_name(&tstr, &name, ctxt);
1.5 millert 930:
1.66 espie 931: idx = classify_var(name.s, &name.e, &k);
1.83 espie 932: val = get_expanded_value(name.s, name.e, idx, k, ctxt, err, freePtr);
1.70 espie 933: if (has_modifier) {
1.66 espie 934: val = VarModifiers_Apply(val, &name, ctxt, err, freePtr,
1.70 espie 935: &tstr, str[1]);
936: }
1.66 espie 937: if (val == NULL) {
938: val = err ? var_Error : varNoError;
939: /* Dynamic source */
940: if (idx != GLOBAL_INDEX) {
941: /* can't be expanded for now: copy the spec instead. */
942: if (ctxt == NULL) {
943: *freePtr = true;
1.70 espie 944: val = Str_dupi(str, tstr);
1.66 espie 945: } else {
946: /* somehow, this should have been expanded already. */
947: GNode *n;
948:
949: /* XXX */
950: n = (GNode *)(((char *)ctxt) -
951: offsetof(GNode, context));
952: if (idx >= LOCAL_SIZE)
953: idx = EXTENDED2SIMPLE(idx);
954: switch(idx) {
955: case IMPSRC_INDEX:
956: Fatal(
957: "Using $< in a non-suffix rule context is a GNUmake idiom (line %lu of %s)",
958: n->lineno, n->fname);
1.81 deraadt 959: break;
1.66 espie 960: default:
961: Error(
962: "Using undefined dynamic variable $%s (line %lu of %s)",
963: varnames[idx], n->lineno, n->fname);
964: break;
965: }
966: }
1.53 espie 967: }
968: }
1.66 espie 969: VarName_Free(&name);
1.70 espie 970: *lengthPtr = tstr - str;
1.66 espie 971: return val;
1.42 espie 972: }
973:
1.66 espie 974:
1.1 deraadt 975: char *
1.66 espie 976: Var_Subst(const char *str, /* the string in which to substitute */
977: SymTable *ctxt, /* the context wherein to find variables */
1.59 espie 978: bool undefErr) /* true if undefineds are an error */
979: {
1.66 espie 980: BUFFER buf; /* Buffer for forming things */
981: static bool errorReported;
982:
983: Buf_Init(&buf, MAKE_BSIZE);
984: errorReported = false;
985:
986: for (;;) {
987: char *val; /* Value to substitute for a variable */
988: size_t length; /* Length of the variable invocation */
989: bool doFree; /* Set true if val should be freed */
990: const char *cp;
991:
992: /* copy uninteresting stuff */
993: for (cp = str; *str != '\0' && *str != '$'; str++)
994: ;
995: Buf_Addi(&buf, cp, str);
996: if (*str == '\0')
997: break;
998: if (str[1] == '$') {
999: /* A $ may be escaped with another $. */
1000: Buf_AddChar(&buf, '$');
1001: str += 2;
1002: continue;
1003: }
1004: val = Var_Parse(str, ctxt, undefErr, &length, &doFree);
1005: /* When we come down here, val should either point to the
1006: * value of this variable, suitably modified, or be NULL.
1007: * Length should be the total length of the potential
1008: * variable invocation (from $ to end character...) */
1009: if (val == var_Error || val == varNoError) {
1010: /* If errors are not an issue, skip over the variable
1011: * and continue with the substitution. Otherwise, store
1012: * the dollar sign and advance str so we continue with
1013: * the string... */
1014: if (errorIsOkay)
1015: str += length;
1016: else if (undefErr) {
1017: /* If variable is undefined, complain and
1018: * skip the variable name. The complaint
1019: * will stop us from doing anything when
1020: * the file is parsed. */
1021: if (!errorReported)
1022: Parse_Error(PARSE_FATAL,
1023: "Undefined variable \"%.*s\"",
1024: length, str);
1025: str += length;
1026: errorReported = true;
1027: } else {
1028: Buf_AddChar(&buf, *str);
1029: str++;
1030: }
1031: } else {
1032: /* We've now got a variable structure to store in.
1033: * But first, advance the string pointer. */
1034: str += length;
1035:
1036: /* Copy all the characters from the variable value
1037: * straight into the new string. */
1038: Buf_AddString(&buf, val);
1039: if (doFree)
1040: free(val);
1041: }
1.24 espie 1042: }
1.66 espie 1043: return Buf_Retrieve(&buf);
1044: }
1045:
1.74 espie 1046: static BUFFER subst_buffer;
1047:
1.77 espie 1048: /* we would like to subst on intervals, but it's complicated, so we cheat
1049: * by storing the interval in a static buffer.
1.74 espie 1050: */
1051: char *
1052: Var_Substi(const char *str, const char *estr, SymTable *ctxt, bool undefErr)
1053: {
1054: /* delimited string: no need to copy */
1055: if (estr == NULL || *estr == '\0')
1056: return Var_Subst(str, ctxt, undefErr);
1057:
1058: Buf_Reset(&subst_buffer);
1059: Buf_Addi(&subst_buffer, str, estr);
1060: return Var_Subst(Buf_Retrieve(&subst_buffer), ctxt, undefErr);
1061: }
1.66 espie 1062:
1063: /***
1064: *** Supplementary support for .for loops.
1065: ***/
1066:
1067:
1068:
1069: struct LoopVar
1070: {
1071: Var old; /* keep old variable value (before the loop) */
1072: Var *me; /* the variable we're dealing with */
1073: };
1074:
1075:
1076: struct LoopVar *
1077: Var_NewLoopVar(const char *name, const char *ename)
1078: {
1079: struct LoopVar *l;
1080: uint32_t k;
1081:
1082: l = emalloc(sizeof(struct LoopVar));
1083:
1084: /* we obtain a new variable quickly, make a snapshot of its old
1085: * value, and make sure the environment cannot touch us.
1086: */
1087: /* XXX: should we avoid dynamic variables ? */
1088: k = ohash_interval(name, &ename);
1089:
1090: l->me = find_global_var_without_env(name, ename, k);
1.80 espie 1091: l->old = *(l->me);
1.67 espie 1092: l->me->flags = VAR_SEEN_ENV | VAR_DUMMY;
1.66 espie 1093: return l;
1.85 espie 1094: }
1095:
1096: char *
1097: Var_LoopVarName(struct LoopVar *v)
1098: {
1099: return v->me->name;
1.66 espie 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: bool doFree; /* should val be freed ? */
1.80 espie 1168: char *newval;
1.66 espie 1169: struct Name name;
1170:
1171: doFree = false;
1172: name.s = var;
1173: name.e = var + (p-str);
1174:
1175: /* val won't be freed since !doFree, but
1176: * VarModifiers_Apply doesn't know that,
1177: * hence the cast. */
1.77 espie 1178: newval = VarModifiers_Apply((char *)val,
1.70 espie 1179: &name, NULL, false, &doFree, &p, paren);
1.66 espie 1180: Buf_AddString(buf, newval);
1181: if (doFree)
1182: free(newval);
1.70 espie 1183: str = p;
1.66 espie 1184: continue;
1185: } else
1186: str = p+1;
1187: }
1188: Buf_AddString(buf, val);
1189: }
1190: }
1.1 deraadt 1191:
1.66 espie 1192: /***
1193: *** Odds and ends
1194: ***/
1.1 deraadt 1195:
1.62 espie 1196: static void
1197: set_magic_shell_variable()
1198: {
1.66 espie 1199: const char *name = "SHELL";
1200: const char *ename = NULL;
1201: uint32_t k;
1202: Var *v;
1203:
1204: k = ohash_interval(name, &ename);
1205: v = find_global_var_without_env(name, ename, k);
1206: var_set_value(v, _PATH_BSHELL);
1207: /* XXX the environment shall never affect it */
1208: v->flags = VAR_SHELL | VAR_SEEN_ENV;
1209: }
1210:
1211: /*
1212: * Var_Init
1.1 deraadt 1213: * Initialize the module
1214: */
1215: void
1.59 espie 1216: Var_Init(void)
1.1 deraadt 1217: {
1.66 espie 1218: ohash_init(&global_variables, 10, &var_info);
1219: set_magic_shell_variable();
1.35 espie 1220:
1.62 espie 1221:
1.66 espie 1222: errorIsOkay = true;
1223: Var_setCheckEnvFirst(false);
1.53 espie 1224:
1.66 espie 1225: VarModifiers_Init();
1.74 espie 1226: Buf_Init(&subst_buffer, MAKE_BSIZE);
1.1 deraadt 1227: }
1228:
1229:
1.55 espie 1230: #ifdef CLEANUP
1.1 deraadt 1231: void
1.59 espie 1232: Var_End(void)
1.1 deraadt 1233: {
1.66 espie 1234: Var *v;
1235: unsigned int i;
1.38 espie 1236:
1.66 espie 1237: for (v = ohash_first(&global_variables, &i); v != NULL;
1238: v = ohash_next(&global_variables, &i))
1239: delete_var(v);
1.55 espie 1240: }
1.37 espie 1241: #endif
1.5 millert 1242:
1.53 espie 1243: static const char *interpret(int);
1244:
1245: static const char *
1.59 espie 1246: interpret(int f)
1.53 espie 1247: {
1.66 espie 1248: if (f & VAR_DUMMY)
1249: return "(D)";
1250: return "";
1.53 espie 1251: }
1252:
1.1 deraadt 1253:
1.31 espie 1254: static void
1.66 espie 1255: print_var(Var *v)
1.1 deraadt 1256: {
1.66 espie 1257: printf("%-16s%s = %s\n", v->name, interpret(v->flags),
1258: (v->flags & VAR_DUMMY) == 0 ? var_get_value(v) : "(none)");
1.1 deraadt 1259: }
1260:
1261: void
1.59 espie 1262: Var_Dump(void)
1.1 deraadt 1263: {
1.66 espie 1264: Var *v;
1265: unsigned int i;
1.53 espie 1266:
1.66 espie 1267: printf("#*** Global Variables:\n");
1.37 espie 1268:
1.66 espie 1269: for (v = ohash_first(&global_variables, &i); v != NULL;
1270: v = ohash_next(&global_variables, &i))
1271: print_var(v);
1.53 espie 1272: }
1.46 espie 1273:
1274: static const char *quotable = " \t\n\\'\"";
1275:
1.66 espie 1276: /* POSIX says that variable assignments passed on the command line should be
1.46 espie 1277: * propagated to sub makes through MAKEFLAGS.
1278: */
1279: void
1.59 espie 1280: Var_AddCmdline(const char *name)
1.46 espie 1281: {
1.66 espie 1282: Var *v;
1283: unsigned int i;
1284: BUFFER buf;
1285: char *s;
1286:
1287: Buf_Init(&buf, MAKE_BSIZE);
1288:
1289: for (v = ohash_first(&global_variables, &i); v != NULL;
1290: v = ohash_next(&global_variables, &i)) {
1291: /* This is not as expensive as it looks: this function is
1292: * called before parsing Makefiles, so there are just a
1293: * few non cmdling variables in there.
1294: */
1.62 espie 1295: if (!(v->flags & VAR_FROM_CMD)) {
1296: continue;
1297: }
1.46 espie 1298: /* We assume variable names don't need quoting */
1299: Buf_AddString(&buf, v->name);
1300: Buf_AddChar(&buf, '=');
1.66 espie 1301: for (s = var_get_value(v); *s != '\0'; s++) {
1.46 espie 1302: if (strchr(quotable, *s))
1303: Buf_AddChar(&buf, '\\');
1304: Buf_AddChar(&buf, *s);
1305: }
1306: Buf_AddSpace(&buf);
1.66 espie 1307: }
1.73 espie 1308: Var_Append(name, Buf_Retrieve(&buf));
1.66 espie 1309: Buf_Destroy(&buf);
1.46 espie 1310: }
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