This is a minor simplification; if we do not have any symbols the empty symbol table can be in 32-bit format. MFC after: 1 week Sponsored by: The FreeBSD Foundation
954 lines
25 KiB
C
954 lines
25 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2007 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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* 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 THE 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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/endian.h>
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#include <sys/mman.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 <errno.h>
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#include <fcntl.h>
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#include <gelf.h>
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#include <libgen.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 <sysexits.h>
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#include <unistd.h>
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#include "ar.h"
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#define _ARMAG_LEN 8 /* length of ar magic string */
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#define _ARHDR_LEN 60 /* length of ar header */
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#define _INIT_AS_CAP 128 /* initial archive string table size */
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#define _INIT_SYMOFF_CAP (256*(sizeof(uint64_t))) /* initial so table size */
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#define _INIT_SYMNAME_CAP 1024 /* initial sn table size */
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#define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */
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#define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */
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static void add_to_ar_str_table(struct bsdar *bsdar, const char *name);
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static void add_to_ar_sym_table(struct bsdar *bsdar, const char *name);
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static struct ar_obj *create_obj_from_file(struct bsdar *bsdar,
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const char *name, time_t mtime);
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static void create_symtab_entry(struct bsdar *bsdar, void *maddr,
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size_t size);
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static void free_obj(struct bsdar *bsdar, struct ar_obj *obj);
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static void insert_obj(struct bsdar *bsdar, struct ar_obj *obj,
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struct ar_obj *pos);
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static void prefault_buffer(const char *buf, size_t s);
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static void read_objs(struct bsdar *bsdar, const char *archive,
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int checkargv);
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static void write_archive(struct bsdar *bsdar, char mode);
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static void write_cleanup(struct bsdar *bsdar);
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static void write_data(struct bsdar *bsdar, struct archive *a,
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const void *buf, size_t s);
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static void write_objs(struct bsdar *bsdar);
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void
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ar_mode_d(struct bsdar *bsdar)
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{
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write_archive(bsdar, 'd');
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}
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void
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ar_mode_m(struct bsdar *bsdar)
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{
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write_archive(bsdar, 'm');
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}
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void
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ar_mode_q(struct bsdar *bsdar)
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{
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write_archive(bsdar, 'q');
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}
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void
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ar_mode_r(struct bsdar *bsdar)
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{
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write_archive(bsdar, 'r');
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}
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void
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ar_mode_s(struct bsdar *bsdar)
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{
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write_archive(bsdar, 's');
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}
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void
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ar_mode_A(struct bsdar *bsdar)
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{
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write_archive(bsdar, 'A');
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}
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/*
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* Create object from file, return created obj upon success, or NULL
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* when an error occurs or the member is not newer than existing
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* one while -u is specified.
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*/
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static struct ar_obj *
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create_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime)
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{
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struct ar_obj *obj;
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struct stat sb;
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const char *bname;
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char *tmpname;
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if (name == NULL)
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return (NULL);
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obj = malloc(sizeof(struct ar_obj));
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if (obj == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
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if ((obj->fd = open(name, O_RDONLY, 0)) < 0) {
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bsdar_warnc(bsdar, errno, "can't open file: %s", name);
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free(obj);
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return (NULL);
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}
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tmpname = strdup(name);
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if (tmpname == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
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if ((bname = basename(tmpname)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed");
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if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) {
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if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
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(void)strncpy(obj->name, bname, _TRUNCATE_LEN);
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obj->name[_TRUNCATE_LEN] = '\0';
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} else
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if ((obj->name = strdup(bname)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
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free(tmpname);
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if (fstat(obj->fd, &sb) < 0) {
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bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name);
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goto giveup;
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}
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if (!S_ISREG(sb.st_mode)) {
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bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name);
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goto giveup;
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}
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/*
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* When option '-u' is specified and member is not newer than the
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* existing one, the replace will not happen. While if mtime == 0,
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* which indicates that this is to "replace a none exist member",
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* the replace will proceed regardless of '-u'.
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*/
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if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime)
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goto giveup;
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/*
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* When option '-D' is specified, mtime and UID / GID from the file
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* will be replaced with 0, and file mode with 644. This ensures that
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* checksums will match for two archives containing the exact same
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* files.
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*/
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if (bsdar->options & AR_D) {
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obj->uid = 0;
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obj->gid = 0;
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obj->mtime = 0;
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obj->md = S_IFREG | 0644;
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} else {
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obj->uid = sb.st_uid;
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obj->gid = sb.st_gid;
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obj->mtime = sb.st_mtime;
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obj->md = sb.st_mode;
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}
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obj->size = sb.st_size;
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obj->dev = sb.st_dev;
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obj->ino = sb.st_ino;
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if (obj->size == 0) {
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obj->maddr = NULL;
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return (obj);
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}
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if ((obj->maddr = mmap(NULL, obj->size, PROT_READ,
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MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) {
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bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name);
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goto giveup;
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}
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if (close(obj->fd) < 0)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
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obj->name);
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return (obj);
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giveup:
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if (close(obj->fd) < 0)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
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obj->name);
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free(obj->name);
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free(obj);
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return (NULL);
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}
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/*
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* Free object itself and its associated allocations.
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*/
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static void
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free_obj(struct bsdar *bsdar, struct ar_obj *obj)
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{
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if (obj->fd == -1)
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free(obj->maddr);
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else
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if (obj->maddr != NULL && munmap(obj->maddr, obj->size))
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bsdar_warnc(bsdar, errno,
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"can't munmap file: %s", obj->name);
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free(obj->name);
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free(obj);
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}
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/*
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* Insert obj to the tail, or before/after the pos obj.
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*/
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static void
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insert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos)
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{
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if (obj == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj");
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if (pos == NULL || obj == pos)
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/*
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* If the object to move happens to be the position obj,
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* or if there is not a pos obj, move it to tail.
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*/
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goto tail;
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if (bsdar->options & AR_B) {
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TAILQ_INSERT_BEFORE(pos, obj, objs);
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return;
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}
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if (bsdar->options & AR_A) {
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TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs);
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return;
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}
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tail:
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TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
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}
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/*
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* Read objects from archive into v_obj list. Note that checkargv is
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* set when read_objs is used to read objects from the target of
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* ADDLIB command (ar script mode), in this case argv array possibly
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* specifies the members ADDLIB want.
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*/
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static void
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read_objs(struct bsdar *bsdar, const char *archive, int checkargv)
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{
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struct archive *a;
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struct archive_entry *entry;
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struct ar_obj *obj;
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const char *name;
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const char *bname;
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char *buff;
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char **av;
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size_t size;
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int i, r, find;
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if ((a = archive_read_new()) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, 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, archive, DEF_BLKSZ));
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for (;;) {
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r = archive_read_next_header(a, &entry);
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if (r == ARCHIVE_FATAL)
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bsdar_errc(bsdar, EX_DATAERR, archive_errno(a), "%s",
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archive_error_string(a));
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if (r == ARCHIVE_EOF)
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break;
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if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY)
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bsdar_warnc(bsdar, archive_errno(a), "%s",
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archive_error_string(a));
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if (r == ARCHIVE_RETRY) {
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bsdar_warnc(bsdar, 0, "Retrying...");
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continue;
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}
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name = archive_entry_pathname(entry);
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/*
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* skip pseudo members.
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*/
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if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0)
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continue;
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/*
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* If checkargv is set, only read those members specified
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* in argv.
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*/
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if (checkargv && bsdar->argc > 0) {
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find = 0;
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for(i = 0; i < bsdar->argc; i++) {
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av = &bsdar->argv[i];
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if (*av == NULL)
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continue;
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if ((bname = basename(*av)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno,
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"basename failed");
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if (strcmp(bname, name) != 0)
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continue;
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*av = NULL;
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find = 1;
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break;
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}
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if (!find)
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continue;
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}
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size = archive_entry_size(entry);
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if (size > 0) {
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if ((buff = malloc(size)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno,
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"malloc failed");
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if (archive_read_data(a, buff, size) != (ssize_t)size) {
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bsdar_warnc(bsdar, archive_errno(a), "%s",
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archive_error_string(a));
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free(buff);
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continue;
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}
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} else
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buff = NULL;
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obj = malloc(sizeof(struct ar_obj));
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if (obj == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
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obj->maddr = buff;
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if ((obj->name = strdup(name)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
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obj->size = size;
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obj->uid = archive_entry_uid(entry);
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obj->gid = archive_entry_gid(entry);
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obj->md = archive_entry_mode(entry);
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obj->mtime = archive_entry_mtime(entry);
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obj->dev = 0;
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obj->ino = 0;
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/*
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* Objects from archive have obj->fd set to -1,
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* for the ease of cleaning up.
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*/
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obj->fd = -1;
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TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
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}
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AC(archive_read_close(a));
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AC(archive_read_free(a));
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}
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/*
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* Determine the constitution of resulting archive.
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*/
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static void
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write_archive(struct bsdar *bsdar, char mode)
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{
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struct ar_obj *nobj, *obj, *obj_temp, *pos;
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struct stat sb;
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const char *bname;
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char **av;
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int i;
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TAILQ_INIT(&bsdar->v_obj);
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nobj = NULL;
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pos = NULL;
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memset(&sb, 0, sizeof(sb));
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/*
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* Test if the specified archive exists, to figure out
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* whether we are creating one here.
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*/
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if (stat(bsdar->filename, &sb) != 0) {
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if (errno != ENOENT) {
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bsdar_warnc(bsdar, 0, "stat %s failed",
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bsdar->filename);
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return;
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}
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/* We do not create archive in mode 'd', 'm' and 's'. */
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if (mode != 'r' && mode != 'q') {
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bsdar_warnc(bsdar, 0, "%s: no such file",
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bsdar->filename);
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return;
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}
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/* Issue a warning if -c is not specified when creating. */
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if (!(bsdar->options & AR_C))
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bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename);
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goto new_archive;
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}
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/*
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* First read members from existing archive.
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*/
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read_objs(bsdar, bsdar->filename, 0);
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/*
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* For mode 's', no member will be moved, deleted or replaced.
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*/
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if (mode == 's')
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goto write_objs;
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/*
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* For mode 'q', we don't need to adjust existing members either.
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* Also, -a, -b and -i are ignored in this mode. New members are
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* always inserted at tail.
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*/
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if (mode == 'q')
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goto new_archive;
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/*
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* Mode 'A' adds the contents of another archive to the tail of
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* current archive. Note that mode 'A' is a special mode for the
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* ADDLIB command of the ar script mode. Currently there is no
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* access to this function from the ar command line mode.
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*/
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if (mode == 'A') {
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/*
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* Read objects from the target archive of ADDLIB command.
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* If there are members specified in argv, read those members
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* only, otherwise the entire archive will be read.
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*/
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read_objs(bsdar, bsdar->addlib, 1);
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goto write_objs;
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}
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/*
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* Try to find the position member specified by user.
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*/
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if (bsdar->options & AR_A || bsdar->options & AR_B) {
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TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
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if (strcmp(obj->name, bsdar->posarg) == 0) {
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pos = obj;
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break;
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}
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}
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/*
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* If can't find `pos' specified by user,
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* silently insert objects at tail.
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*/
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if (pos == NULL)
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bsdar->options &= ~(AR_A | AR_B);
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}
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for (i = 0; i < bsdar->argc; i++) {
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av = &bsdar->argv[i];
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TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
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if ((bname = basename(*av)) == NULL)
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bsdar_errc(bsdar, EX_SOFTWARE, errno,
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"basename failed");
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if (bsdar->options & AR_TR) {
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if (strncmp(bname, obj->name, _TRUNCATE_LEN))
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continue;
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} else
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if (strcmp(bname, obj->name) != 0)
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continue;
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if (mode == 'r') {
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/*
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* if the new member is not qualified
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* to replace the old one, skip it.
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*/
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nobj = create_obj_from_file(bsdar, *av,
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obj->mtime);
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if (nobj == NULL)
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goto skip_obj;
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}
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if (bsdar->options & AR_V)
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(void)fprintf(stdout, "%c - %s\n", mode,
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*av);
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TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
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if (mode == 'd' || mode == 'r')
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free_obj(bsdar, obj);
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if (mode == 'm')
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insert_obj(bsdar, obj, pos);
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if (mode == 'r')
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insert_obj(bsdar, nobj, pos);
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skip_obj:
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*av = NULL;
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break;
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}
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|
}
|
|
|
|
new_archive:
|
|
/*
|
|
* When operating in mode 'r', directly add those user specified
|
|
* objects which do not exist in current archive. When operating
|
|
* in mode 'q', all objects specified in command line args are
|
|
* appended to the archive, without comparing with existing ones.
|
|
*/
|
|
for (i = 0; i < bsdar->argc; i++) {
|
|
av = &bsdar->argv[i];
|
|
if (*av != NULL && (mode == 'r' || mode == 'q')) {
|
|
nobj = create_obj_from_file(bsdar, *av, 0);
|
|
if (nobj != NULL)
|
|
insert_obj(bsdar, nobj, pos);
|
|
if (bsdar->options & AR_V && nobj != NULL)
|
|
(void)fprintf(stdout, "a - %s\n", *av);
|
|
*av = NULL;
|
|
}
|
|
}
|
|
|
|
write_objs:
|
|
write_objs(bsdar);
|
|
write_cleanup(bsdar);
|
|
}
|
|
|
|
/*
|
|
* Memory cleaning up.
|
|
*/
|
|
static void
|
|
write_cleanup(struct bsdar *bsdar)
|
|
{
|
|
struct ar_obj *obj, *obj_temp;
|
|
|
|
TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
|
|
TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
|
|
free_obj(bsdar, obj);
|
|
}
|
|
|
|
free(bsdar->as);
|
|
free(bsdar->s_so);
|
|
free(bsdar->s_sn);
|
|
bsdar->as = NULL;
|
|
bsdar->s_so = NULL;
|
|
bsdar->s_so_max = 0;
|
|
bsdar->s_sn = NULL;
|
|
}
|
|
|
|
/*
|
|
* Fault in the buffer prior to writing as a workaround for poor performance
|
|
* due to interaction with kernel fs deadlock avoidance code. See the comment
|
|
* above vn_io_fault_doio() in sys/kern/vfs_vnops.c for details of the issue.
|
|
*/
|
|
static void
|
|
prefault_buffer(const char *buf, size_t s)
|
|
{
|
|
volatile const char *p;
|
|
size_t page_size;
|
|
|
|
if (s == 0)
|
|
return;
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
for (p = buf; p < buf + s; p += page_size)
|
|
*p;
|
|
/*
|
|
* Ensure we touch the last page as well, in case the buffer is not
|
|
* page-aligned.
|
|
*/
|
|
*(volatile const char *)(buf + s - 1);
|
|
}
|
|
|
|
/*
|
|
* Wrapper for archive_write_data().
|
|
*/
|
|
static void
|
|
write_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s)
|
|
{
|
|
ssize_t written;
|
|
|
|
prefault_buffer(buf, s);
|
|
while (s > 0) {
|
|
written = archive_write_data(a, buf, s);
|
|
if (written < 0)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, archive_errno(a), "%s",
|
|
archive_error_string(a));
|
|
buf = (const char *)buf + written;
|
|
s -= written;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Write the resulting archive members.
|
|
*/
|
|
static void
|
|
write_objs(struct bsdar *bsdar)
|
|
{
|
|
struct ar_obj *obj;
|
|
struct archive *a;
|
|
struct archive_entry *entry;
|
|
size_t s_sz; /* size of archive symbol table. */
|
|
size_t pm_sz; /* size of pseudo members */
|
|
size_t w_sz; /* size of words in symbol table */
|
|
uint64_t nr;
|
|
int i;
|
|
|
|
if (elf_version(EV_CURRENT) == EV_NONE)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, 0,
|
|
"ELF library initialization failed: %s", elf_errmsg(-1));
|
|
|
|
bsdar->rela_off = 0;
|
|
|
|
/* Create archive symbol table and archive string table, if need. */
|
|
TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
|
|
if (!(bsdar->options & AR_SS) && obj->maddr != NULL)
|
|
create_symtab_entry(bsdar, obj->maddr, obj->size);
|
|
if (strlen(obj->name) > _MAXNAMELEN_SVR4)
|
|
add_to_ar_str_table(bsdar, obj->name);
|
|
bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2;
|
|
}
|
|
|
|
/*
|
|
* Pad the symbol name string table. It is treated specially because
|
|
* symbol name table should be padded by a '\0', not the common '\n'
|
|
* for other members. The size of sn table includes the pad bit.
|
|
*/
|
|
if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0)
|
|
bsdar->s_sn[bsdar->s_sn_sz++] = '\0';
|
|
|
|
/*
|
|
* Archive string table is padded by a "\n" as the normal members.
|
|
* The difference is that the size of archive string table counts
|
|
* in the pad bit, while normal members' size fileds do not.
|
|
*/
|
|
if (bsdar->as != NULL && bsdar->as_sz % 2 != 0)
|
|
bsdar->as[bsdar->as_sz++] = '\n';
|
|
|
|
/*
|
|
* If there is a symbol table, calculate the size of pseudo members,
|
|
* convert previously stored relative offsets to absolute ones, and
|
|
* then make them Big Endian.
|
|
*
|
|
* absolute_offset = htobe32(relative_offset + size_of_pseudo_members)
|
|
*/
|
|
w_sz = sizeof(uint32_t);
|
|
if (bsdar->s_cnt != 0) {
|
|
s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz;
|
|
pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz);
|
|
if (bsdar->as != NULL)
|
|
pm_sz += _ARHDR_LEN + bsdar->as_sz;
|
|
/* Use the 64-bit word size format if necessary. */
|
|
if (bsdar->s_so_max > UINT32_MAX - pm_sz) {
|
|
w_sz = sizeof(uint64_t);
|
|
pm_sz -= s_sz;
|
|
s_sz = (bsdar->s_cnt + 1) * sizeof(uint64_t) +
|
|
bsdar->s_sn_sz;
|
|
pm_sz += s_sz;
|
|
}
|
|
|
|
for (i = 0; (size_t)i < bsdar->s_cnt; i++) {
|
|
if (w_sz == sizeof(uint32_t))
|
|
*(bsdar->s_so + i) =
|
|
htobe32((uint32_t)(*(bsdar->s_so + i)) + pm_sz);
|
|
else
|
|
*(bsdar->s_so + i) =
|
|
htobe64(*(bsdar->s_so + i) + pm_sz);
|
|
}
|
|
}
|
|
|
|
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_filename(a, bsdar->filename));
|
|
|
|
/*
|
|
* write the archive symbol table, if there is one.
|
|
* If options -s is explicitly specified or we are invoked
|
|
* as ranlib, write the symbol table even if it is empty.
|
|
*/
|
|
if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) ||
|
|
bsdar->options & AR_S) {
|
|
entry = archive_entry_new();
|
|
if (entry == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, 0,
|
|
"archive_entry_new failed");
|
|
if (w_sz == sizeof(uint64_t))
|
|
archive_entry_copy_pathname(entry, "/SYM64/");
|
|
else
|
|
archive_entry_copy_pathname(entry, "/");
|
|
if ((bsdar->options & AR_D) == 0)
|
|
archive_entry_set_mtime(entry, time(NULL), 0);
|
|
archive_entry_set_size(entry, (bsdar->s_cnt + 1) * w_sz +
|
|
bsdar->s_sn_sz);
|
|
AC(archive_write_header(a, entry));
|
|
if (w_sz == sizeof(uint32_t))
|
|
nr = (uint64_t)htobe32((uint32_t)bsdar->s_cnt);
|
|
else
|
|
nr = htobe64(bsdar->s_cnt);
|
|
write_data(bsdar, a, &nr, w_sz);
|
|
if (w_sz == sizeof(uint64_t))
|
|
write_data(bsdar, a, bsdar->s_so, sizeof(uint64_t) *
|
|
bsdar->s_cnt);
|
|
else
|
|
for (i = 0; (size_t)i < bsdar->s_cnt; i++)
|
|
write_data(bsdar, a,
|
|
(uint32_t *)&bsdar->s_so[i],
|
|
sizeof(uint32_t));
|
|
write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz);
|
|
archive_entry_free(entry);
|
|
}
|
|
|
|
/* write the archive string table, if any. */
|
|
if (bsdar->as != NULL) {
|
|
entry = archive_entry_new();
|
|
if (entry == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, 0,
|
|
"archive_entry_new failed");
|
|
archive_entry_copy_pathname(entry, "//");
|
|
archive_entry_set_size(entry, bsdar->as_sz);
|
|
AC(archive_write_header(a, entry));
|
|
write_data(bsdar, a, bsdar->as, bsdar->as_sz);
|
|
archive_entry_free(entry);
|
|
}
|
|
|
|
/* write normal members. */
|
|
TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
|
|
entry = archive_entry_new();
|
|
if (entry == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, 0,
|
|
"archive_entry_new failed");
|
|
archive_entry_copy_pathname(entry, obj->name);
|
|
archive_entry_set_uid(entry, obj->uid);
|
|
archive_entry_set_gid(entry, obj->gid);
|
|
archive_entry_set_mode(entry, obj->md);
|
|
archive_entry_set_size(entry, obj->size);
|
|
archive_entry_set_mtime(entry, obj->mtime, 0);
|
|
archive_entry_set_dev(entry, obj->dev);
|
|
archive_entry_set_ino(entry, obj->ino);
|
|
archive_entry_set_filetype(entry, AE_IFREG);
|
|
AC(archive_write_header(a, entry));
|
|
write_data(bsdar, a, obj->maddr, obj->size);
|
|
archive_entry_free(entry);
|
|
}
|
|
|
|
AC(archive_write_close(a));
|
|
AC(archive_write_free(a));
|
|
}
|
|
|
|
/*
|
|
* Extract global symbols from ELF binary members.
|
|
*/
|
|
static void
|
|
create_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size)
|
|
{
|
|
Elf *e;
|
|
Elf_Scn *scn;
|
|
GElf_Shdr shdr;
|
|
GElf_Sym sym;
|
|
Elf_Data *data;
|
|
char *name;
|
|
size_t n, shstrndx;
|
|
int elferr, tabndx, len, i;
|
|
|
|
if ((e = elf_memory(maddr, size)) == NULL) {
|
|
bsdar_warnc(bsdar, 0, "elf_memory() failed: %s",
|
|
elf_errmsg(-1));
|
|
return;
|
|
}
|
|
if (elf_kind(e) != ELF_K_ELF) {
|
|
/* Silently ignore non-elf member. */
|
|
elf_end(e);
|
|
return;
|
|
}
|
|
if (elf_getshstrndx(e, &shstrndx) == 0) {
|
|
bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s",
|
|
elf_errmsg(-1));
|
|
elf_end(e);
|
|
return;
|
|
}
|
|
|
|
tabndx = -1;
|
|
scn = NULL;
|
|
while ((scn = elf_nextscn(e, scn)) != NULL) {
|
|
if (gelf_getshdr(scn, &shdr) != &shdr) {
|
|
bsdar_warnc(bsdar, 0,
|
|
"elf_getshdr failed: %s", elf_errmsg(-1));
|
|
continue;
|
|
}
|
|
if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) {
|
|
bsdar_warnc(bsdar, 0,
|
|
"elf_strptr failed: %s", elf_errmsg(-1));
|
|
continue;
|
|
}
|
|
if (strcmp(name, ".strtab") == 0) {
|
|
tabndx = elf_ndxscn(scn);
|
|
break;
|
|
}
|
|
}
|
|
elferr = elf_errno();
|
|
if (elferr != 0)
|
|
bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s",
|
|
elf_errmsg(elferr));
|
|
if (tabndx == -1) {
|
|
bsdar_warnc(bsdar, 0, "can't find .strtab section");
|
|
elf_end(e);
|
|
return;
|
|
}
|
|
|
|
scn = NULL;
|
|
while ((scn = elf_nextscn(e, scn)) != NULL) {
|
|
if (gelf_getshdr(scn, &shdr) != &shdr) {
|
|
bsdar_warnc(bsdar, EX_SOFTWARE, 0,
|
|
"elf_getshdr failed: %s", elf_errmsg(-1));
|
|
continue;
|
|
}
|
|
if (shdr.sh_type != SHT_SYMTAB)
|
|
continue;
|
|
|
|
data = NULL;
|
|
n = 0;
|
|
while (n < shdr.sh_size &&
|
|
(data = elf_getdata(scn, data)) != NULL) {
|
|
len = data->d_size / shdr.sh_entsize;
|
|
for (i = 0; i < len; i++) {
|
|
if (gelf_getsym(data, i, &sym) != &sym) {
|
|
bsdar_warnc(bsdar, EX_SOFTWARE, 0,
|
|
"gelf_getsym failed: %s",
|
|
elf_errmsg(-1));
|
|
continue;
|
|
}
|
|
|
|
/* keep only global or weak symbols */
|
|
if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL &&
|
|
GELF_ST_BIND(sym.st_info) != STB_WEAK)
|
|
continue;
|
|
|
|
/* keep only defined symbols */
|
|
if (sym.st_shndx == SHN_UNDEF)
|
|
continue;
|
|
|
|
if ((name = elf_strptr(e, tabndx,
|
|
sym.st_name)) == NULL) {
|
|
bsdar_warnc(bsdar, EX_SOFTWARE, 0,
|
|
"elf_strptr failed: %s",
|
|
elf_errmsg(-1));
|
|
continue;
|
|
}
|
|
|
|
add_to_ar_sym_table(bsdar, name);
|
|
}
|
|
}
|
|
}
|
|
elferr = elf_errno();
|
|
if (elferr != 0)
|
|
bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s",
|
|
elf_errmsg(elferr));
|
|
|
|
elf_end(e);
|
|
}
|
|
|
|
/*
|
|
* Append to the archive string table buffer.
|
|
*/
|
|
static void
|
|
add_to_ar_str_table(struct bsdar *bsdar, const char *name)
|
|
{
|
|
|
|
if (bsdar->as == NULL) {
|
|
bsdar->as_cap = _INIT_AS_CAP;
|
|
bsdar->as_sz = 0;
|
|
if ((bsdar->as = malloc(bsdar->as_cap)) == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
|
|
}
|
|
|
|
/*
|
|
* The space required for holding one member name in as table includes:
|
|
* strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding).
|
|
*/
|
|
while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) {
|
|
bsdar->as_cap *= 2;
|
|
bsdar->as = realloc(bsdar->as, bsdar->as_cap);
|
|
if (bsdar->as == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
|
|
}
|
|
strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name));
|
|
bsdar->as_sz += strlen(name);
|
|
bsdar->as[bsdar->as_sz++] = '/';
|
|
bsdar->as[bsdar->as_sz++] = '\n';
|
|
}
|
|
|
|
/*
|
|
* Append to the archive symbol table buffer.
|
|
*/
|
|
static void
|
|
add_to_ar_sym_table(struct bsdar *bsdar, const char *name)
|
|
{
|
|
|
|
if (bsdar->s_so == NULL) {
|
|
if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) ==
|
|
NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
|
|
bsdar->s_so_cap = _INIT_SYMOFF_CAP;
|
|
bsdar->s_cnt = 0;
|
|
}
|
|
|
|
if (bsdar->s_sn == NULL) {
|
|
if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
|
|
bsdar->s_sn_cap = _INIT_SYMNAME_CAP;
|
|
bsdar->s_sn_sz = 0;
|
|
}
|
|
|
|
if (bsdar->s_cnt * sizeof(uint64_t) >= bsdar->s_so_cap) {
|
|
bsdar->s_so_cap *= 2;
|
|
bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap);
|
|
if (bsdar->s_so == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
|
|
}
|
|
bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off;
|
|
if ((uint64_t)bsdar->rela_off > bsdar->s_so_max)
|
|
bsdar->s_so_max = (uint64_t)bsdar->rela_off;
|
|
bsdar->s_cnt++;
|
|
|
|
/*
|
|
* The space required for holding one symbol name in sn table includes:
|
|
* strlen(name) + (1 for '\n') + (possibly 1 for padding).
|
|
*/
|
|
while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) {
|
|
bsdar->s_sn_cap *= 2;
|
|
bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap);
|
|
if (bsdar->s_sn == NULL)
|
|
bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
|
|
}
|
|
strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name));
|
|
bsdar->s_sn_sz += strlen(name);
|
|
bsdar->s_sn[bsdar->s_sn_sz++] = '\0';
|
|
}
|