GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <glob.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "vcc_compile.h"

#include "vfil.h"

struct source *
vcc_new_source(const char *src, const char *kind, const char *name)
{
        struct source *sp;

        AN(src);
        AN(name);
        ALLOC_OBJ(sp, SOURCE_MAGIC);
        AN(sp);
        REPLACE(sp->name, name);
        sp->kind = kind;
        sp->b = src;
        sp->e = strchr(src, '\0');
        VTAILQ_INIT(&sp->src_tokens);
        return (sp);
}

/*--------------------------------------------------------------------*/

struct source *
vcc_file_source(struct vcc *tl, const char *fn)
{
        char *f, *fnp;
        struct source *sp;

        if (!tl->unsafe_path && strchr(fn, '/') != NULL) {
                VSB_printf(tl->sb, "VCL filename '%s' is unsafe.\n", fn);
                tl->err = 1;
                return (NULL);
        }
        f = NULL;
        if (VFIL_searchpath(tl->vcl_path, NULL, &f, fn, &fnp) || f == NULL) {
                VSB_printf(tl->sb, "Cannot read file '%s' (%s)\n",
                    fnp != NULL ? fnp : fn, strerror(errno));
                free(fnp);
                tl->err = 1;
                return (NULL);
        }
        sp = vcc_new_source(f, "file", fnp);
        free(fnp);
        return (sp);
}

/*--------------------------------------------------------------------*/

static void
vcc_include_file(struct vcc *tl, const struct source *src_sp,
    const char *filename, const struct token *parent_token)
{
        struct source *sp;

        sp = vcc_file_source(tl, filename);
        if (sp == NULL)
                return;

        sp->parent = src_sp;
        sp->parent_tok = parent_token;
        vcc_lex_source(tl, sp, 0);
}

/*--------------------------------------------------------------------*/

static void
vcc_include_glob_file(struct vcc *tl, const struct source *src_sp,
    const char *filename, const struct token *parent_token)
{
        glob_t  g[1];
        unsigned u;
        int i;

        if (filename[0] != '/' && (filename[0] != '.' || filename[1] != '/')) {
                VSB_cat(tl->sb,
                    "+glob can only be used with absolute paths or relative "
                    "paths starting with './'\n");
                tl->err = 1;
                return;
        }
        memset(g, 0, sizeof g);
        i = glob(filename, 0, NULL, g);
        switch (i) {
        case 0:
                for (u = 0; !tl->err && u < g->gl_pathc; u++) {
                        vcc_include_file(
                            tl, src_sp, g->gl_pathv[u], parent_token);
                }
                break;
        case GLOB_NOMATCH:
                VSB_cat(tl->sb, "glob pattern matched no files.\n");
                tl->err = 1;
                break;
        default:
                VSB_printf(tl->sb, "glob(3) expansion failed (%d)\n", i);
                tl->err = 1;
                break;
        }
        globfree(g);
}

/*--------------------------------------------------------------------
 * NB: We cannot use vcc_ErrWhere2() on tokens which are not on the
 * NB: tl->tokens list.
 */

static struct token *
vcc_lex_include(struct vcc *tl, const struct source *src_sp, struct token *t)
{
        struct token *tok1;
        int i, glob_flag = 0;
        struct vsb *vsb = NULL;
        const char *filename;
        const char *p;

        assert(vcc_IdIs(t, "include"));

        tok1 = VTAILQ_NEXT(t, src_list);
        AN(tok1);

        while (1) {
                t = VTAILQ_NEXT(tok1, src_list);
                AN(t);
                i = vcc_IsFlagRaw(tl, tok1, t);
                if (i < 0)
                        break;
                if (vcc_IdIs(t, "glob")) {
                        glob_flag = i;
                } else {
                        VSB_cat(tl->sb, "Unknown include flag:\n");
                        vcc_ErrWhere(tl, t);
                        return (t);
                }
                tok1 = VTAILQ_NEXT(t, src_list);
                AN(tok1);
        }

        if (tok1->tok != CSTR) {
                VSB_cat(tl->sb,
                    "include not followed by string constant.\n");
                vcc_ErrWhere(tl, tok1);
                return (t);
        }
        t = VTAILQ_NEXT(tok1, src_list);
        AN(t);

        if (t->tok != ';') {
                VSB_cat(tl->sb,
                    "include <string> not followed by semicolon.\n");
                vcc_ErrWhere(tl, tok1);
                return (t);
        }

        filename = tok1->dec;

        if (filename[0] == '.' && filename[1] == '/') {
                /*
                 * Nested include filenames, starting with "./" are
                 * resolved relative to the VCL file which contains
                 * the include directive.
                 */
                if (src_sp->name[0] != '/') {
                        VSB_cat(tl->sb,
                            "include \"./xxxxx\"; needs absolute "
                            "filename of including file.\n");
                        vcc_ErrWhere(tl, tok1);
                        return (t);
                }
                vsb = VSB_new_auto();
                AN(vsb);
                p = strrchr(src_sp->name, '/');
                AN(p);
                VSB_bcat(vsb, src_sp->name, p - src_sp->name);
                VSB_cat(vsb, filename + 1);
                AZ(VSB_finish(vsb));
                filename = VSB_data(vsb);
        }

        if (glob_flag)
                vcc_include_glob_file(tl, src_sp, filename, tok1);
        else
                vcc_include_file(tl, src_sp, filename, tok1);
        if (vsb != NULL)
                VSB_destroy(&vsb);
        if (tl->err)
                vcc_ErrWhere(tl, tok1);
        return (t);
}

void
vcc_lex_source(struct vcc *tl, struct source *src_sp, int eoi)
{
        struct token *t;
        const struct source *sp1;

        CHECK_OBJ_NOTNULL(src_sp, SOURCE_MAGIC);

        for (sp1 = src_sp->parent; sp1 != NULL; sp1 = sp1->parent) {
                if (!strcmp(sp1->name, src_sp->name) &&
                    !strcmp(sp1->kind, src_sp->kind)) {
                        VSB_printf(tl->sb,
                            "Recursive use of %s \"%s\"\n\n",
                            src_sp->kind, src_sp->name);
                        tl->err = 1;
                        return;
                }
        }

        VTAILQ_INSERT_TAIL(&tl->sources, src_sp, list);
        src_sp->idx = tl->nsources++;

        vcc_Lexer(tl, src_sp);
        if (tl->err)
                return;
        VTAILQ_FOREACH(t, &src_sp->src_tokens, src_list) {
                if (!eoi && t->tok == EOI)
                        break;

                if (t->tok == ID && vcc_IdIs(t, "include")) {
                        t = vcc_lex_include(tl, src_sp, t);
                } else {
                        VTAILQ_INSERT_TAIL(&tl->tokens, t, list);
                }
                if (tl->err)
                        return;
        }
}

		varnish-cache/lib/libvcc/vcc_source.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*/
30
31		#include "config.h"
32
33		#include <glob.h>
34		#include <stdlib.h>
35		#include <string.h>
36		#include <unistd.h>
37
38		#include "vcc_compile.h"
39
40		#include "vfil.h"
41
42		struct source *
43	4543	vcc_new_source(const char src, const char kind, const char *name)
44		{
45		struct source *sp;
46
47	4543	AN(src);
48	4543	AN(name);
49	4543	ALLOC_OBJ(sp, SOURCE_MAGIC);
50	4543	AN(sp);
51	4543	REPLACE(sp->name, name);
52	4543	sp->kind = kind;
53	4543	sp->b = src;
54	4543	sp->e = strchr(src, '\0');
55	4543	VTAILQ_INIT(&sp->src_tokens);
56	4543	return (sp);
57		}
58
59		/--------------------------------------------------------------------/
60
61		struct source *
62	52	vcc_file_source(struct vcc tl, const char fn)
63		{
64		char f, fnp;
65		struct source *sp;
66
67	52	if (!tl->unsafe_path && strchr(fn, '/') != NULL) {
68	1	VSB_printf(tl->sb, "VCL filename '%s' is unsafe.\n", fn);
69	1	tl->err = 1;
70	1	return (NULL);
71		}
72	51	f = NULL;
73	51	if (VFIL_searchpath(tl->vcl_path, NULL, &f, fn, &fnp) \|\| f == NULL) {
74	2	VSB_printf(tl->sb, "Cannot read file '%s' (%s)\n",
75	1	fnp != NULL ? fnp : fn, strerror(errno));
76	1	free(fnp);
77	1	tl->err = 1;
78	1	return (NULL);
79		}
80	50	sp = vcc_new_source(f, "file", fnp);
81	50	free(fnp);
82	50	return (sp);
83	52	}
84
85		/--------------------------------------------------------------------/
86
87		static void
88	40	vcc_include_file(struct vcc tl, const struct source src_sp,
89		const char filename, const struct token parent_token)
90		{
91		struct source *sp;
92
93	40	sp = vcc_file_source(tl, filename);
94	40	if (sp == NULL)
95	1	return;
96
97	39	sp->parent = src_sp;
98	39	sp->parent_tok = parent_token;
99	39	vcc_lex_source(tl, sp, 0);
100	40	}
101
102		/--------------------------------------------------------------------/
103
104		static void
105	5	vcc_include_glob_file(struct vcc tl, const struct source src_sp,
106		const char filename, const struct token parent_token)
107		{
108		glob_t g[1];
109		unsigned u;
110		int i;
111
112	5	if (filename[0] != '/' && (filename[0] != '.' \|\| filename[1] != '/')) {
113	1	VSB_cat(tl->sb,
114		"+glob can only be used with absolute paths or relative "
115		"paths starting with './'\n");
116	1	tl->err = 1;
117	1	return;
118		}
119	4	memset(g, 0, sizeof g);
120	4	i = glob(filename, 0, NULL, g);
121	4	switch (i) {
122		case 0:
123	8	for (u = 0; !tl->err && u < g->gl_pathc; u++) {
124	5	vcc_include_file(
125	5	tl, src_sp, g->gl_pathv[u], parent_token);
126	5	}
127	3	break;
128		case GLOB_NOMATCH:
129	1	VSB_cat(tl->sb, "glob pattern matched no files.\n");
130	1	tl->err = 1;
131	1	break;
132		default:
133	0	VSB_printf(tl->sb, "glob(3) expansion failed (%d)\n", i);
134	0	tl->err = 1;
135	0	break;
136		}
137	4	globfree(g);
138	5	}
139
140		/*--------------------------------------------------------------------
141		* NB: We cannot use vcc_ErrWhere2() on tokens which are not on the
142		* NB: tl->tokens list.
143		*/
144
145		static struct token *
146	45	vcc_lex_include(struct vcc tl, const struct source src_sp, struct token *t)
147		{
148		struct token *tok1;
149	45	int i, glob_flag = 0;
150	45	struct vsb *vsb = NULL;
151		const char *filename;
152		const char *p;
153
154	45	assert(vcc_IdIs(t, "include"));
155
156	45	tok1 = VTAILQ_NEXT(t, src_list);
157	45	AN(tok1);
158
159	51	while (1) {
160	51	t = VTAILQ_NEXT(tok1, src_list);
161	51	AN(t);
162	51	i = vcc_IsFlagRaw(tl, tok1, t);
163	51	if (i < 0)
164	45	break;
165	6	if (vcc_IdIs(t, "glob")) {
166	6	glob_flag = i;
167	6	} else {
168	0	VSB_cat(tl->sb, "Unknown include flag:\n");
169	0	vcc_ErrWhere(tl, t);
170	0	return (t);
171		}
172	6	tok1 = VTAILQ_NEXT(t, src_list);
173	6	AN(tok1);
174		}
175
176	45	if (tok1->tok != CSTR) {
177	2	VSB_cat(tl->sb,
178		"include not followed by string constant.\n");
179	2	vcc_ErrWhere(tl, tok1);
180	2	return (t);
181		}
182	43	t = VTAILQ_NEXT(tok1, src_list);
183	43	AN(t);
184
185	43	if (t->tok != ';') {
186	1	VSB_cat(tl->sb,
187		"include <string> not followed by semicolon.\n");
188	1	vcc_ErrWhere(tl, tok1);
189	1	return (t);
190		}
191
192	42	filename = tok1->dec;
193
194	42	if (filename[0] == '.' && filename[1] == '/') {
195		/*
196		* Nested include filenames, starting with "./" are
197		* resolved relative to the VCL file which contains
198		* the include directive.
199		*/
200	10	if (src_sp->name[0] != '/') {
201	2	VSB_cat(tl->sb,
202		"include \"./xxxxx\"; needs absolute "
203		"filename of including file.\n");
204	2	vcc_ErrWhere(tl, tok1);
205	2	return (t);
206		}
207	8	vsb = VSB_new_auto();
208	8	AN(vsb);
209	8	p = strrchr(src_sp->name, '/');
210	8	AN(p);
211	8	VSB_bcat(vsb, src_sp->name, p - src_sp->name);
212	8	VSB_cat(vsb, filename + 1);
213	8	AZ(VSB_finish(vsb));
214	8	filename = VSB_data(vsb);
215	8	}
216
217	40	if (glob_flag)
218	5	vcc_include_glob_file(tl, src_sp, filename, tok1);
219		else
220	35	vcc_include_file(tl, src_sp, filename, tok1);
221	40	if (vsb != NULL)
222	8	VSB_destroy(&vsb);
223	40	if (tl->err)
224	8	vcc_ErrWhere(tl, tok1);
225	40	return (t);
226	45	}
227
228		void
229	4543	vcc_lex_source(struct vcc tl, struct source src_sp, int eoi)
230		{
231		struct token *t;
232		const struct source *sp1;
233
234	4543	CHECK_OBJ_NOTNULL(src_sp, SOURCE_MAGIC);
235
236	4595	for (sp1 = src_sp->parent; sp1 != NULL; sp1 = sp1->parent) {
237	54	if (!strcmp(sp1->name, src_sp->name) &&
238	2	!strcmp(sp1->kind, src_sp->kind)) {
239	4	VSB_printf(tl->sb,
240		"Recursive use of %s \"%s\"\n\n",
241	2	src_sp->kind, src_sp->name);
242	2	tl->err = 1;
243	2	return;
244		}
245	52	}
246
247	4541	VTAILQ_INSERT_TAIL(&tl->sources, src_sp, list);
248	4541	src_sp->idx = tl->nsources++;
249
250	4541	vcc_Lexer(tl, src_sp);
251	4541	if (tl->err)
252	23	return;
253	2423111	VTAILQ_FOREACH(t, &src_sp->src_tokens, src_list) {
254	2420119	if (!eoi && t->tok == EOI)
255	1513	break;
256
257	2418606	if (t->tok == ID && vcc_IdIs(t, "include")) {
258	45	t = vcc_lex_include(tl, src_sp, t);
259	45	} else {
260	2418561	VTAILQ_INSERT_TAIL(&tl->tokens, t, list);
261		}
262	2418606	if (tl->err)
263	13	return;
264	2418593	}
265	4543	}