%{
/*-
* Copyright (c) 2008 Kai Wang
* All rights reserved.
*
* 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
* in this position and unchanged.
* 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(S) ``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 THE AUTHOR(S) 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <archive.h>
#include <archive_entry.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "ar.h"
#define TEMPLATE "arscp.XXXXXXXX"
struct list {
char *str;
struct list *next;
};
extern int yylex(void);
static void yyerror(const char *);
static void arscp_addlib(char *archive, struct list *list);
static void arscp_addmod(struct list *list);
static void arscp_clear(void);
static int arscp_copy(int ifd, int ofd);
static void arscp_create(char *in, char *out);
static void arscp_delete(struct list *list);
static void arscp_dir(char *archive, struct list *list, char *rlt);
static void arscp_end(int eval);
static void arscp_extract(struct list *list);
static void arscp_free_argv(void);
static void arscp_free_mlist(struct list *list);
static void arscp_list(void);
static struct list *arscp_mlist(struct list *list, char *str);
static void arscp_mlist2argv(struct list *list);
static int arscp_mlist_len(struct list *list);
static void arscp_open(char *fname);
static void arscp_prompt(void);
static void arscp_replace(struct list *list);
static void arscp_save(void);
static int arscp_target_exist(void);
extern int lineno;
static struct bsdar *bsdar;
static char *target;
static char *tmpac;
static int interactive;
static int verbose;
%}
%token ADDLIB
%token ADDMOD
%token CLEAR
%token CREATE
%token DELETE
%token DIRECTORY
%token END
%token EXTRACT
%token LIST
%token OPEN
%token REPLACE
%token VERBOSE
%token SAVE
%token LP
%token RP
%token COMMA
%token EOL
%token <str> FNAME
%type <list> mod_list
%union {
char *str;
struct list *list;
}
%%
begin
: { arscp_prompt(); } ar_script
;
ar_script
: cmd_list
|
;
mod_list
: FNAME { $$ = arscp_mlist(NULL, $1); }
| mod_list separator FNAME { $$ = arscp_mlist($1, $3); }
;
separator
: COMMA
|
;
cmd_list
: rawcmd
| cmd_list rawcmd
;
rawcmd
: cmd EOL { arscp_prompt(); }
;
cmd
: addlib_cmd
| addmod_cmd
| clear_cmd
| create_cmd
| delete_cmd
| directory_cmd
| end_cmd
| extract_cmd
| list_cmd
| open_cmd
| replace_cmd
| verbose_cmd
| save_cmd
| invalid_cmd
| empty_cmd
| error
;
addlib_cmd
: ADDLIB FNAME LP mod_list RP { arscp_addlib($2, $4); }
| ADDLIB FNAME { arscp_addlib($2, NULL); }
;
addmod_cmd
: ADDMOD mod_list { arscp_addmod($2); }
;
clear_cmd
: CLEAR { arscp_clear(); }
;
create_cmd
: CREATE FNAME { arscp_create(NULL, $2); }
;
delete_cmd
: DELETE mod_list { arscp_delete($2); }
;
directory_cmd
: DIRECTORY FNAME { arscp_dir($2, NULL, NULL); }
| DIRECTORY FNAME LP mod_list RP { arscp_dir($2, $4, NULL); }
| DIRECTORY FNAME LP mod_list RP FNAME { arscp_dir($2, $4, $6); }
;
end_cmd
: END { arscp_end(EX_OK); }
;
extract_cmd
: EXTRACT mod_list { arscp_extract($2); }
;
list_cmd
: LIST { arscp_list(); }
;
open_cmd
: OPEN FNAME { arscp_open($2); }
;
replace_cmd
: REPLACE mod_list { arscp_replace($2); }
;
save_cmd
: SAVE { arscp_save(); }
;
verbose_cmd
: VERBOSE { verbose = !verbose; }
;
empty_cmd
:
;
invalid_cmd
: FNAME { yyerror(NULL); }
;
%%
/* ARGSUSED */
static void
yyerror(const char *s)
{
(void) s;
printf("Syntax error in archive script, line %d\n", lineno);
}
/*
* arscp_open first open an archive and check its validity. If the archive
* format is valid, it calls arscp_create to create a temporary copy of
* the archive.
*/
static void
arscp_open(char *fname)
{
struct archive *a;
struct archive_entry *entry;
int r;
if ((a = archive_read_new()) == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed");
archive_read_support_format_ar(a);
AC(archive_read_open_filename(a, fname, DEF_BLKSZ));
if ((r = archive_read_next_header(a, &entry)))
bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
AC(archive_read_close(a));
AC(archive_read_free(a));
if (r != ARCHIVE_OK)
return;
arscp_create(fname, fname);
}
/*
* Create archive. in != NULL indicate it's a OPEN cmd, and resulting
* archive is based on modification of an existing one. If in == NULL,
* we are in CREATE cmd and a new empty archive will be created.
*/
static void
arscp_create(char *in, char *out)
{
struct archive *a;
int ifd, ofd;
/* Delete previously created temporary archive, if any. */
if (tmpac) {
if (unlink(tmpac) < 0)
bsdar_errc(bsdar, EX_IOERR, errno, "unlink failed");
free(tmpac);
}
tmpac = strdup(TEMPLATE);
if (tmpac == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
if ((ofd = mkstemp(tmpac)) < 0)
bsdar_errc(bsdar, EX_IOERR, errno, "mkstemp failed");
if (in) {
/*
* Command OPEN creates a temporary copy of the
* input archive.
*/
if ((ifd = open(in, O_RDONLY)) < 0) {
bsdar_warnc(bsdar, errno, "open failed");
return;
}
if (arscp_copy(ifd, ofd)) {
bsdar_warnc(bsdar, 0, "arscp_copy failed");
return;
}
close(ifd);
close(ofd);
} else {
/*
* Command CREATE creates an "empty" archive.
* (archive with only global header)
*/
if ((a = archive_write_new()) == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, 0,
"archive_write_new failed");
archive_write_set_format_ar_svr4(a);
AC(archive_write_open_fd(a, ofd));
AC(archive_write_close(a));
AC(archive_write_free(a));
}
/* Override previous target, if any. */
if (target)
free(target);
target = out;
bsdar->filename = tmpac;
}
/* A file copying implementation using mmap. */
static int
arscp_copy(int ifd, int ofd)
{
struct stat sb;
char *buf, *p;
ssize_t w;
size_t bytes;
if (fstat(ifd, &sb) < 0) {
bsdar_warnc(bsdar, errno, "fstate failed");
return (1);
}
if ((p = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, ifd,
(off_t)0)) == MAP_FAILED) {
bsdar_warnc(bsdar, errno, "mmap failed");
return (1);
}
for (buf = p, bytes = sb.st_size; bytes > 0; bytes -= w) {
w = write(ofd, buf, bytes);
if (w <= 0) {
bsdar_warnc(bsdar, errno, "write failed");
break;
}
}
if (munmap(p, sb.st_size) < 0)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "munmap failed");
if (bytes > 0)
return (1);
return (0);
}
/*
* Add all modules of archive to current archive, if list != NULL,
* only those modules specified in 'list' will be added.
*/
static void
arscp_addlib(char *archive, struct list *list)
{
if (!arscp_target_exist())
return;
arscp_mlist2argv(list);
bsdar->addlib = archive;
ar_mode_A(bsdar);
arscp_free_argv();
arscp_free_mlist(list);
}
/* Add modules into current archive. */
static void
arscp_addmod(struct list *list)
{
if (!arscp_target_exist())
return;
arscp_mlist2argv(list);
ar_mode_q(bsdar);
arscp_free_argv();
arscp_free_mlist(list);
}
/* Delete modules from current archive. */
static void
arscp_delete(struct list *list)
{
if (!arscp_target_exist())
return;
arscp_mlist2argv(list);
ar_mode_d(bsdar);
arscp_free_argv();
arscp_free_mlist(list);
}
/* Extract modules from current archive. */
static void
arscp_extract(struct list *list)
{
if (!arscp_target_exist())
return;
arscp_mlist2argv(list);
ar_mode_x(bsdar);
arscp_free_argv();
arscp_free_mlist(list);
}
/* List modules of archive. (Simple Mode) */
static void
arscp_list(void)
{
if (!arscp_target_exist())
return;
bsdar->argc = 0;
bsdar->argv = NULL;
/* Always verbose. */
bsdar->options |= AR_V;
ar_mode_t(bsdar);
bsdar->options &= ~AR_V;
}
/* List modules of archive. (Advance Mode) */
static void
arscp_dir(char *archive, struct list *list, char *rlt)
{
FILE *out;
/* If rlt != NULL, redirect output to it */
out = NULL;
if (rlt) {
out = stdout;
if ((stdout = fopen(rlt, "w")) == NULL)
bsdar_errc(bsdar, EX_IOERR, errno,
"fopen %s failed", rlt);
}
bsdar->filename = archive;
if (list)
arscp_mlist2argv(list);
else {
bsdar->argc = 0;
bsdar->argv = NULL;
}
if (verbose)
bsdar->options |= AR_V;
ar_mode_t(bsdar);
bsdar->options &= ~AR_V;
if (rlt) {
if (fclose(stdout) == EOF)
bsdar_errc(bsdar, EX_IOERR, errno,
"fclose %s failed", rlt);
stdout = out;
free(rlt);
}
free(archive);
bsdar->filename = tmpac;
arscp_free_argv();
arscp_free_mlist(list);
}
/* Replace modules of current archive. */
static void
arscp_replace(struct list *list)
{
if (!arscp_target_exist())
return;
arscp_mlist2argv(list);
ar_mode_r(bsdar);
arscp_free_argv();
arscp_free_mlist(list);
}
/* Rename the temporary archive to the target archive. */
static void
arscp_save(void)
{
mode_t mask;
if (target) {
if (rename(tmpac, target) < 0)
bsdar_errc(bsdar, EX_IOERR, errno, "rename failed");
/*
* mkstemp creates temp files with mode 0600, here we
* set target archive mode per process umask.
*/
mask = umask(0);
umask(mask);
if (chmod(target, 0666 & ~mask) < 0)
bsdar_errc(bsdar, EX_IOERR, errno, "chmod failed");
free(tmpac);
free(target);
tmpac = NULL;
target= NULL;
bsdar->filename = NULL;
} else
bsdar_warnc(bsdar, 0, "no open output archive");
}
/*
* Discard all the contents of current archive. This is achieved by
* invoking CREATE cmd on current archive.
*/
static void
arscp_clear(void)
{
char *new_target;
if (target) {
new_target = strdup(target);
if (new_target == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
arscp_create(NULL, new_target);
}
}
/*
* Quit ar(1). Note that END cmd will not SAVE current archive
* before exit.
*/
static void
arscp_end(int eval)
{
if (target)
free(target);
if (tmpac) {
if (unlink(tmpac) == -1)
bsdar_errc(bsdar, EX_IOERR, errno, "unlink %s failed",
tmpac);
free(tmpac);
}
exit(eval);
}
/*
* Check if target specified, i.e, whether OPEN or CREATE has been
* issued by user.
*/
static int
arscp_target_exist(void)
{
if (target)
return (1);
bsdar_warnc(bsdar, 0, "no open output archive");
return (0);
}
/* Construct module list. */
static struct list *
arscp_mlist(struct list *list, char *str)
{
struct list *l;
l = malloc(sizeof(*l));
if (l == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
l->str = str;
l->next = list;
return (l);
}
/* Calculate the length of a mlist. */
static int
arscp_mlist_len(struct list *list)
{
int len;
for(len = 0; list; list = list->next)
len++;
return (len);
}
/* Free the space allocated for mod_list. */
static void
arscp_free_mlist(struct list *list)
{
struct list *l;
/* Note that list->str was freed in arscp_free_argv. */
for(; list; list = l) {
l = list->next;
free(list);
}
}
/* Convert mlist to 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, EX_SOFTWARE, errno, "malloc failed");
/* Note that module names are stored in reverse order in mlist. */
for(i = n - 1; i >= 0; i--, list = list->next) {
if (list == NULL)
bsdar_errc(bsdar, EX_SOFTWARE, errno, "invalid mlist");
argv[i] = list->str;
}
bsdar->argc = n;
bsdar->argv = argv;
}
/* Free space allocated for 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);
}
}
/* Main function for ar script mode. */
void
ar_mode_script(struct bsdar *ar)
{
bsdar = ar;
interactive = isatty(fileno(stdin));
while(yyparse()) {
if (!interactive)
arscp_end(1);
}
/* Script ends without END */
arscp_end(EX_OK);
}
