| | varnish-cache/lib/libvcc/vcc_source.c |
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/*- |
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* Copyright (c) 2006 Verdens Gang AS |
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* Copyright (c) 2006-2015 Varnish Software AS |
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* All rights reserved. |
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* |
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* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* |
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* SPDX-License-Identifier: BSD-2-Clause |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include <glob.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "vcc_compile.h" |
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#include "vfil.h" |
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struct source * |
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185920 |
vcc_new_source(const char *src, const char *kind, const char *name) |
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{ |
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struct source *sp; |
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|
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185920 |
AN(src); |
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185920 |
AN(name); |
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185920 |
ALLOC_OBJ(sp, SOURCE_MAGIC); |
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185920 |
AN(sp); |
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185920 |
REPLACE(sp->name, name); |
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185920 |
sp->kind = kind; |
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185920 |
sp->b = src; |
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185920 |
sp->e = strchr(src, '\0'); |
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185920 |
VTAILQ_INIT(&sp->src_tokens); |
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185920 |
return (sp); |
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} |
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|
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/*--------------------------------------------------------------------*/ |
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struct source * |
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vcc_file_source(struct vcc *tl, const char *fn) |
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{ |
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char *f, *fnp; |
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struct source *sp; |
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|
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2120 |
if (!tl->unsafe_path && strchr(fn, '/') != NULL) { |
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VSB_printf(tl->sb, "VCL filename '%s' is unsafe.\n", fn); |
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tl->err = 1; |
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return (NULL); |
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} |
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f = NULL; |
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if (VFIL_searchpath(tl->vcl_path, NULL, &f, fn, &fnp) || f == NULL) { |
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VSB_printf(tl->sb, "Cannot read file '%s' (%s)\n", |
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fnp != NULL ? fnp : fn, strerror(errno)); |
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free(fnp); |
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tl->err = 1; |
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return (NULL); |
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} |
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2040 |
sp = vcc_new_source(f, "file", fnp); |
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free(fnp); |
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return (sp); |
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2120 |
} |
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|
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/*--------------------------------------------------------------------*/ |
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static void |
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vcc_include_file(struct vcc *tl, const struct source *src_sp, |
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const char *filename, const struct token *parent_token) |
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{ |
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struct source *sp; |
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|
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sp = vcc_file_source(tl, filename); |
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if (sp == NULL) |
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return; |
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|
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sp->parent = src_sp; |
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sp->parent_tok = parent_token; |
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vcc_lex_source(tl, sp, 0); |
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} |
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|
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/*--------------------------------------------------------------------*/ |
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static void |
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vcc_include_glob_file(struct vcc *tl, const struct source *src_sp, |
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const char *filename, const struct token *parent_token) |
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{ |
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glob_t g[1]; |
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unsigned u; |
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int i; |
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if (filename[0] != '/' && (filename[0] != '.' || filename[1] != '/')) { |
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VSB_cat(tl->sb, |
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"+glob can only be used with absolute paths or relative " |
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"paths starting with './'\n"); |
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tl->err = 1; |
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return; |
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} |
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memset(g, 0, sizeof g); |
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i = glob(filename, 0, NULL, g); |
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switch (i) { |
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case 0: |
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for (u = 0; !tl->err && u < g->gl_pathc; u++) { |
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vcc_include_file( |
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tl, src_sp, g->gl_pathv[u], parent_token); |
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} |
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break; |
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case GLOB_NOMATCH: |
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VSB_cat(tl->sb, "glob pattern matched no files.\n"); |
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tl->err = 1; |
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break; |
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default: |
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VSB_printf(tl->sb, "glob(3) expansion failed (%d)\n", i); |
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tl->err = 1; |
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break; |
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} |
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globfree(g); |
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} |
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/*-------------------------------------------------------------------- |
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* NB: We cannot use vcc_ErrWhere2() on tokens which are not on the |
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* NB: tl->tokens list. |
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*/ |
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static struct token * |
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vcc_lex_include(struct vcc *tl, const struct source *src_sp, struct token *t) |
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{ |
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struct token *tok1; |
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int i, glob_flag = 0; |
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struct vsb *vsb = NULL; |
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const char *filename; |
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const char *p; |
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|
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assert(vcc_IdIs(t, "include")); |
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tok1 = VTAILQ_NEXT(t, src_list); |
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AN(tok1); |
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|
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while (1) { |
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t = VTAILQ_NEXT(tok1, src_list); |
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AN(t); |
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i = vcc_IsFlagRaw(tl, tok1, t); |
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if (i < 0) |
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break; |
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if (vcc_IdIs(t, "glob")) { |
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glob_flag = i; |
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} else { |
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VSB_cat(tl->sb, "Unknown include flag:\n"); |
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vcc_ErrWhere(tl, t); |
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return (t); |
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} |
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tok1 = VTAILQ_NEXT(t, src_list); |
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AN(tok1); |
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} |
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|
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if (tok1->tok != CSTR) { |
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VSB_cat(tl->sb, |
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"include not followed by string constant.\n"); |
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vcc_ErrWhere(tl, tok1); |
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return (t); |
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} |
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t = VTAILQ_NEXT(tok1, src_list); |
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AN(t); |
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|
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if (t->tok != ';') { |
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VSB_cat(tl->sb, |
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"include <string> not followed by semicolon.\n"); |
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vcc_ErrWhere(tl, tok1); |
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return (t); |
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} |
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filename = tok1->dec; |
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|
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if (filename[0] == '.' && filename[1] == '/') { |
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/* |
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* Nested include filenames, starting with "./" are |
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* resolved relative to the VCL file which contains |
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* the include directive. |
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*/ |
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if (src_sp->name[0] != '/') { |
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VSB_cat(tl->sb, |
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"include \"./xxxxx\"; needs absolute " |
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"filename of including file.\n"); |
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vcc_ErrWhere(tl, tok1); |
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return (t); |
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} |
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vsb = VSB_new_auto(); |
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AN(vsb); |
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p = strrchr(src_sp->name, '/'); |
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AN(p); |
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VSB_bcat(vsb, src_sp->name, p - src_sp->name); |
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VSB_cat(vsb, filename + 1); |
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AZ(VSB_finish(vsb)); |
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filename = VSB_data(vsb); |
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} |
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|
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if (glob_flag) |
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vcc_include_glob_file(tl, src_sp, filename, tok1); |
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else |
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vcc_include_file(tl, src_sp, filename, tok1); |
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if (vsb != NULL) |
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VSB_destroy(&vsb); |
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if (tl->err) |
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vcc_ErrWhere(tl, tok1); |
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return (t); |
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} |
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|
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void |
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185920 |
vcc_lex_source(struct vcc *tl, struct source *src_sp, int eoi) |
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{ |
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struct token *t; |
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const struct source *sp1; |
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|
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185920 |
CHECK_OBJ_NOTNULL(src_sp, SOURCE_MAGIC); |
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|
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188000 |
for (sp1 = src_sp->parent; sp1 != NULL; sp1 = sp1->parent) { |
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2160 |
if (!strcmp(sp1->name, src_sp->name) && |
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!strcmp(sp1->kind, src_sp->kind)) { |
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VSB_printf(tl->sb, |
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"Recursive use of %s \"%s\"\n\n", |
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src_sp->kind, src_sp->name); |
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tl->err = 1; |
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return; |
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} |
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2080 |
} |
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|
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185840 |
VTAILQ_INSERT_TAIL(&tl->sources, src_sp, list); |
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185840 |
src_sp->idx = tl->nsources++; |
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|
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185840 |
vcc_Lexer(tl, src_sp); |
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185840 |
if (tl->err) |
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return; |
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111320440 |
VTAILQ_FOREACH(t, &src_sp->src_tokens, src_list) { |
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111197960 |
if (!eoi && t->tok == EOI) |
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61920 |
break; |
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|
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111136040 |
if (t->tok == ID && vcc_IdIs(t, "include")) { |
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1800 |
t = vcc_lex_include(tl, src_sp, t); |
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1800 |
} else { |
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111134240 |
VTAILQ_INSERT_TAIL(&tl->tokens, t, list); |
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} |
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111136040 |
if (tl->err) |
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520 |
return; |
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111135520 |
} |
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185920 |
} |