2673a9755e
ELF Tool Chain built on FreeBSD's ar and elfdump, but has a number of improvements and enhancements. Bring them into contrib in order to start integrating into our build.
659 lines
12 KiB
Plaintext
659 lines
12 KiB
Plaintext
%{
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/*-
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* Copyright (c) 2008 Kai Wang
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* All rights reserved.
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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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* in this position and unchanged.
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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(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <archive.h>
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#include <archive_entry.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.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 "libelftc.h"
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#include "ar.h"
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ELFTC_VCSID("$Id");
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#define TEMPLATE "arscp.XXXXXXXX"
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struct list {
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char *str;
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struct list *next;
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};
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extern int yylex(void);
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extern int yyparse(void);
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static void yyerror(const char *);
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static void arscp_addlib(char *archive, struct list *list);
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static void arscp_addmod(struct list *list);
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static void arscp_clear(void);
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static void arscp_create(char *in, char *out);
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static void arscp_delete(struct list *list);
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static void arscp_dir(char *archive, struct list *list, char *rlt);
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static void arscp_end(int eval);
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static void arscp_extract(struct list *list);
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static void arscp_free_argv(void);
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static void arscp_free_mlist(struct list *list);
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static void arscp_list(void);
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static struct list *arscp_mlist(struct list *list, char *str);
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static void arscp_mlist2argv(struct list *list);
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static int arscp_mlist_len(struct list *list);
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static void arscp_open(char *fname);
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static void arscp_prompt(void);
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static void arscp_replace(struct list *list);
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static void arscp_save(void);
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static int arscp_target_exist(void);
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extern int lineno;
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static struct bsdar *bsdar;
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static char *target;
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static char *tmpac;
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static int interactive;
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static int verbose;
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%}
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%token ADDLIB
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%token ADDMOD
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%token CLEAR
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%token CREATE
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%token DELETE
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%token DIRECTORY
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%token END
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%token EXTRACT
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%token LIST
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%token OPEN
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%token REPLACE
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%token VERBOSE
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%token SAVE
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%token LP
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%token RP
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%token COMMA
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%token EOL
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%token <str> FNAME
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%type <list> mod_list
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%union {
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char *str;
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struct list *list;
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}
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%%
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begin
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: { arscp_prompt(); } ar_script
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;
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ar_script
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: cmd_list
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;
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mod_list
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: FNAME { $$ = arscp_mlist(NULL, $1); }
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| mod_list separator FNAME { $$ = arscp_mlist($1, $3); }
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;
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separator
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: COMMA
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;
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cmd_list
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: rawcmd
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| cmd_list rawcmd
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;
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rawcmd
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: cmd EOL { arscp_prompt(); }
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;
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cmd
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: addlib_cmd
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| addmod_cmd
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| clear_cmd
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| create_cmd
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| delete_cmd
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| directory_cmd
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| end_cmd
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| extract_cmd
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| list_cmd
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| open_cmd
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| replace_cmd
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| verbose_cmd
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| save_cmd
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| invalid_cmd
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| empty_cmd
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| error
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;
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addlib_cmd
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: ADDLIB FNAME LP mod_list RP { arscp_addlib($2, $4); }
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| ADDLIB FNAME { arscp_addlib($2, NULL); }
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;
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addmod_cmd
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: ADDMOD mod_list { arscp_addmod($2); }
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;
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clear_cmd
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: CLEAR { arscp_clear(); }
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;
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create_cmd
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: CREATE FNAME { arscp_create(NULL, $2); }
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;
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delete_cmd
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: DELETE mod_list { arscp_delete($2); }
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;
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directory_cmd
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: DIRECTORY FNAME { arscp_dir($2, NULL, NULL); }
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| DIRECTORY FNAME LP mod_list RP { arscp_dir($2, $4, NULL); }
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| DIRECTORY FNAME LP mod_list RP FNAME { arscp_dir($2, $4, $6); }
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;
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end_cmd
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: END { arscp_end(EXIT_SUCCESS); }
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;
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extract_cmd
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: EXTRACT mod_list { arscp_extract($2); }
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;
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list_cmd
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: LIST { arscp_list(); }
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;
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open_cmd
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: OPEN FNAME { arscp_open($2); }
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;
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replace_cmd
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: REPLACE mod_list { arscp_replace($2); }
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;
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save_cmd
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: SAVE { arscp_save(); }
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;
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verbose_cmd
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: VERBOSE { verbose = !verbose; }
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;
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empty_cmd
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:
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;
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invalid_cmd
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: FNAME { yyerror(NULL); }
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;
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%%
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/* ARGSUSED */
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static void
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yyerror(const char *s)
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{
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(void) s;
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printf("Syntax error in archive script, line %d\n", lineno);
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}
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/*
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* The arscp_open() function will first open an archive and check its
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* validity. If the archive format is valid, it will call
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* arscp_create() to create a temporary copy of the archive.
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*/
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static void
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arscp_open(char *fname)
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{
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struct archive *a;
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struct archive_entry *entry;
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int r;
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if ((a = archive_read_new()) == NULL)
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bsdar_errc(bsdar, 0, "archive_read_new failed");
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archive_read_support_format_ar(a);
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AC(archive_read_open_filename(a, fname, DEF_BLKSZ));
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if ((r = archive_read_next_header(a, &entry)))
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bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
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AC(archive_read_close(a));
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ACV(archive_read_free(a));
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if (r != ARCHIVE_OK)
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return;
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arscp_create(fname, fname);
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}
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/*
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* Create an archive.
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*
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* If the parameter 'in' is NULL (the 'CREATE' command), a new empty
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* archive will be created. If the parameter 'in' is not NULL (the
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* 'OPEN' command), the resulting archive will be a modified version
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* of the existing archive.
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*/
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static void
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arscp_create(char *in, char *out)
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{
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struct archive *a;
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int ifd, ofd;
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/* Delete the previously created temporary archive, if any. */
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if (tmpac) {
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if (unlink(tmpac) < 0)
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bsdar_errc(bsdar, errno, "unlink failed");
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free(tmpac);
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}
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tmpac = strdup(TEMPLATE);
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if (tmpac == NULL)
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bsdar_errc(bsdar, errno, "strdup failed");
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if ((ofd = mkstemp(tmpac)) < 0)
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bsdar_errc(bsdar, errno, "mkstemp failed");
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if (in) {
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/*
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* The 'OPEN' command creates a temporary copy of the
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* input archive.
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*/
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if ((ifd = open(in, O_RDONLY)) < 0 ||
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elftc_copyfile(ifd, ofd) < 0) {
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bsdar_warnc(bsdar, errno, "'OPEN' failed");
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(void) close(ofd);
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if (ifd != -1)
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(void) close(ifd);
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return;
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}
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(void) close(ifd);
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(void) close(ofd);
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} else {
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/*
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* The 'CREATE' command creates an "empty" archive (an
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* archive consisting only of the archive header).
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*/
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if ((a = archive_write_new()) == NULL)
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bsdar_errc(bsdar, 0, "archive_write_new failed");
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archive_write_set_format_ar_svr4(a);
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AC(archive_write_open_fd(a, ofd));
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AC(archive_write_close(a));
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ACV(archive_write_free(a));
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}
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/* Override the previous target, if any. */
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if (target)
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free(target);
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target = out;
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bsdar->filename = tmpac;
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}
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/*
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* Add all modules of an archive to the current archive. If the
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* parameter 'list' is not NULL, only those modules specified by
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* 'list' will be added.
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*/
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static void
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arscp_addlib(char *archive, struct list *list)
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{
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if (!arscp_target_exist())
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return;
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arscp_mlist2argv(list);
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bsdar->addlib = archive;
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ar_write_archive(bsdar, 'A');
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* Add modules to the current archive.
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*/
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static void
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arscp_addmod(struct list *list)
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{
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if (!arscp_target_exist())
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return;
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arscp_mlist2argv(list);
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ar_write_archive(bsdar, 'q');
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* Delete modules from the current archive.
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*/
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static void
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arscp_delete(struct list *list)
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{
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if (!arscp_target_exist())
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return;
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arscp_mlist2argv(list);
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ar_write_archive(bsdar, 'd');
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* Extract modules from the current archive.
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*/
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static void
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arscp_extract(struct list *list)
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{
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if (!arscp_target_exist())
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return;
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arscp_mlist2argv(list);
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ar_read_archive(bsdar, 'x');
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* List the contents of an archive (simple mode).
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*/
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static void
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arscp_list(void)
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{
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if (!arscp_target_exist())
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return;
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bsdar->argc = 0;
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bsdar->argv = NULL;
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/* Always verbose. */
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bsdar->options |= AR_V;
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ar_read_archive(bsdar, 't');
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bsdar->options &= ~AR_V;
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}
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/*
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* List the contents of an archive (advanced mode).
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*/
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static void
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arscp_dir(char *archive, struct list *list, char *rlt)
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{
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FILE *out;
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/* If rlt != NULL, redirect the output to it. */
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out = NULL;
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if (rlt) {
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out = bsdar->output;
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if ((bsdar->output = fopen(rlt, "w")) == NULL)
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bsdar_errc(bsdar, errno, "fopen %s failed", rlt);
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}
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bsdar->filename = archive;
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if (list)
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arscp_mlist2argv(list);
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else {
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bsdar->argc = 0;
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bsdar->argv = NULL;
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}
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if (verbose)
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bsdar->options |= AR_V;
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ar_read_archive(bsdar, 't');
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bsdar->options &= ~AR_V;
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if (rlt) {
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if (fclose(bsdar->output) == EOF)
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bsdar_errc(bsdar, errno, "fclose %s failed", rlt);
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bsdar->output = out;
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free(rlt);
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}
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free(archive);
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bsdar->filename = tmpac;
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* Replace modules in the current archive.
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*/
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static void
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arscp_replace(struct list *list)
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{
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if (!arscp_target_exist())
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return;
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arscp_mlist2argv(list);
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ar_write_archive(bsdar, 'r');
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arscp_free_argv();
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arscp_free_mlist(list);
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}
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/*
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* Rename the temporary archive to the target archive.
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*/
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static void
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arscp_save(void)
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{
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mode_t mask;
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if (target) {
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if (rename(tmpac, target) < 0)
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bsdar_errc(bsdar, errno, "rename failed");
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/*
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* Because mkstemp() creates temporary files with mode
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* 0600, we set target archive's mode as per the
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* process umask.
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*/
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mask = umask(0);
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umask(mask);
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if (chmod(target, 0666 & ~mask) < 0)
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bsdar_errc(bsdar, errno, "chmod failed");
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free(tmpac);
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free(target);
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tmpac = NULL;
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target= NULL;
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bsdar->filename = NULL;
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} else
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bsdar_warnc(bsdar, 0, "no open output archive");
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}
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/*
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* Discard the contents of the current archive. This is achieved by
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* invoking the 'CREATE' cmd on the current archive.
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*/
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static void
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arscp_clear(void)
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{
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char *new_target;
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if (target) {
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new_target = strdup(target);
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if (new_target == NULL)
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bsdar_errc(bsdar, errno, "strdup failed");
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arscp_create(NULL, new_target);
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}
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}
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/*
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* Quit ar(1). Note that the 'END' cmd will not 'SAVE' the current
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* archive before exiting.
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*/
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static void
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arscp_end(int eval)
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{
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if (target)
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free(target);
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if (tmpac) {
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if (unlink(tmpac) == -1)
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bsdar_errc(bsdar, errno, "unlink %s failed", tmpac);
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free(tmpac);
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}
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exit(eval);
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}
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/*
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* Check if a target was specified, i.e, whether an 'OPEN' or 'CREATE'
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* had been issued by the user.
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*/
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static int
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arscp_target_exist(void)
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{
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if (target)
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return (1);
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bsdar_warnc(bsdar, 0, "no open output archive");
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return (0);
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}
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/*
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* Construct the list of modules.
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*/
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static struct list *
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arscp_mlist(struct list *list, char *str)
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{
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struct list *l;
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l = malloc(sizeof(*l));
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if (l == NULL)
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bsdar_errc(bsdar, errno, "malloc failed");
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l->str = str;
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l->next = list;
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return (l);
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}
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/*
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* Calculate the length of an mlist.
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*/
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static int
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arscp_mlist_len(struct list *list)
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{
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int len;
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for(len = 0; list; list = list->next)
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len++;
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return (len);
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}
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/*
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* Free the space allocated for a module list.
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*/
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static void
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arscp_free_mlist(struct list *list)
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{
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struct list *l;
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/* Note: list->str was freed in arscp_free_argv(). */
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for(; list; list = l) {
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l = list->next;
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free(list);
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}
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}
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|
/*
|
|
* Convert a module list to an 'argv' array.
|
|
*/
|
|
static void
|
|
arscp_mlist2argv(struct list *list)
|
|
{
|
|
char **argv;
|
|
int i, n;
|
|
|
|
n = arscp_mlist_len(list);
|
|
argv = malloc(n * sizeof(*argv));
|
|
if (argv == NULL)
|
|
bsdar_errc(bsdar, errno, "malloc failed");
|
|
|
|
/* Note that module names are stored in reverse order. */
|
|
for(i = n - 1; i >= 0; i--, list = list->next) {
|
|
if (list == NULL)
|
|
bsdar_errc(bsdar, errno, "invalid mlist");
|
|
argv[i] = list->str;
|
|
}
|
|
|
|
bsdar->argc = n;
|
|
bsdar->argv = argv;
|
|
}
|
|
|
|
/*
|
|
* Free the space allocated for an argv array and its elements.
|
|
*/
|
|
static void
|
|
arscp_free_argv(void)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < bsdar->argc; i++)
|
|
free(bsdar->argv[i]);
|
|
|
|
free(bsdar->argv);
|
|
}
|
|
|
|
/*
|
|
* Show a prompt if we are in interactive mode.
|
|
*/
|
|
static void
|
|
arscp_prompt(void)
|
|
{
|
|
|
|
if (interactive) {
|
|
printf("AR >");
|
|
fflush(stdout);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The main function implementing script mode.
|
|
*/
|
|
void
|
|
ar_mode_script(struct bsdar *ar)
|
|
{
|
|
|
|
bsdar = ar;
|
|
interactive = isatty(fileno(stdin));
|
|
while(yyparse()) {
|
|
if (!interactive)
|
|
arscp_end(EXIT_FAILURE);
|
|
}
|
|
|
|
/* Script ends without END */
|
|
arscp_end(EXIT_SUCCESS);
|
|
}
|