write.c revision 176525
1176434Skaiw/*- 2176434Skaiw * Copyright (c) 2007 Kai Wang 3176434Skaiw * All rights reserved. 4176434Skaiw * 5176434Skaiw * Redistribution and use in source and binary forms, with or without 6176434Skaiw * modification, are permitted provided that the following conditions 7176434Skaiw * are met: 8176434Skaiw * 1. Redistributions of source code must retain the above copyright 9176434Skaiw * notice, this list of conditions and the following disclaimer 10176434Skaiw * in this position and unchanged. 11176434Skaiw * 2. Redistributions in binary form must reproduce the above copyright 12176434Skaiw * notice, this list of conditions and the following disclaimer in the 13176434Skaiw * documentation and/or other materials provided with the distribution. 14176434Skaiw * 15176434Skaiw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16176434Skaiw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17176434Skaiw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18176434Skaiw * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19176434Skaiw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20176434Skaiw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21176434Skaiw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22176434Skaiw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23176434Skaiw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24176434Skaiw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25176434Skaiw */ 26176434Skaiw 27176434Skaiw#include <sys/cdefs.h> 28176434Skaiw__FBSDID("$FreeBSD: head/usr.bin/ar/write.c 176525 2008-02-24 17:57:29Z kaiw $"); 29176434Skaiw 30176434Skaiw#include <sys/endian.h> 31176434Skaiw#include <sys/mman.h> 32176434Skaiw#include <sys/queue.h> 33176434Skaiw#include <sys/stat.h> 34176434Skaiw#include <archive.h> 35176434Skaiw#include <archive_entry.h> 36176434Skaiw#include <errno.h> 37176434Skaiw#include <fcntl.h> 38176434Skaiw#include <gelf.h> 39176434Skaiw#include <libgen.h> 40176434Skaiw#include <stdio.h> 41176434Skaiw#include <stdlib.h> 42176434Skaiw#include <string.h> 43176434Skaiw#include <sysexits.h> 44176434Skaiw 45176434Skaiw#include "ar.h" 46176434Skaiw 47176434Skaiw#define _ARMAG_LEN 8 /* length of ar magic string */ 48176434Skaiw#define _ARHDR_LEN 60 /* length of ar header */ 49176434Skaiw#define _INIT_AS_CAP 128 /* initial archive string table size */ 50176434Skaiw#define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */ 51176434Skaiw#define _INIT_SYMNAME_CAP 1024 /* initial sn table size */ 52176434Skaiw#define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */ 53176434Skaiw#define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */ 54176434Skaiw 55176434Skaiwstatic void add_to_ar_str_table(struct bsdar *bsdar, const char *name); 56176434Skaiwstatic void add_to_ar_sym_table(struct bsdar *bsdar, const char *name); 57176434Skaiwstatic struct ar_obj *create_obj_from_file(struct bsdar *bsdar, 58176434Skaiw const char *name, time_t mtime); 59176434Skaiwstatic void create_symtab_entry(struct bsdar *bsdar, void *maddr, 60176434Skaiw size_t size); 61176434Skaiwstatic void insert_obj(struct bsdar *bsdar, struct ar_obj *obj, 62176434Skaiw struct ar_obj *pos); 63176434Skaiwstatic void write_archive(struct bsdar *bsdar, char mode); 64176434Skaiwstatic void write_cleanup(struct bsdar *bsdar); 65176434Skaiwstatic void write_data(struct bsdar *bsdar, struct archive *a, 66176434Skaiw const void *buf, size_t s); 67176434Skaiwstatic void write_objs(struct bsdar *bsdar); 68176434Skaiw 69176434Skaiwvoid 70176434Skaiwar_mode_d(struct bsdar *bsdar) 71176434Skaiw{ 72176434Skaiw 73176434Skaiw write_archive(bsdar, 'd'); 74176434Skaiw} 75176434Skaiw 76176434Skaiwvoid 77176434Skaiwar_mode_m(struct bsdar *bsdar) 78176434Skaiw{ 79176434Skaiw 80176434Skaiw write_archive(bsdar, 'm'); 81176434Skaiw} 82176434Skaiw 83176434Skaiwvoid 84176434Skaiwar_mode_r(struct bsdar *bsdar) 85176434Skaiw{ 86176434Skaiw 87176434Skaiw write_archive(bsdar, 'r'); 88176434Skaiw} 89176434Skaiw 90176434Skaiwvoid 91176434Skaiwar_mode_s(struct bsdar *bsdar) 92176434Skaiw{ 93176434Skaiw 94176434Skaiw write_archive(bsdar, 's'); 95176434Skaiw} 96176434Skaiw 97176434Skaiw/* 98176434Skaiw * Create object from file, return created obj upon success, or NULL 99176434Skaiw * when an error occurs or the member is not newer than existing 100176434Skaiw * one while -u is specifed. 101176434Skaiw */ 102176434Skaiwstatic struct ar_obj * 103176434Skaiwcreate_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime) 104176434Skaiw{ 105176434Skaiw struct ar_obj *obj; 106176434Skaiw struct stat sb; 107176434Skaiw const char *bname; 108176434Skaiw 109176434Skaiw if (name == NULL) 110176434Skaiw return(NULL); 111176434Skaiw 112176434Skaiw obj = malloc(sizeof(struct ar_obj)); 113176434Skaiw if (obj == NULL) 114176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 115176434Skaiw if ((obj->fd = open(name, O_RDONLY, 0)) < 0) { 116176434Skaiw bsdar_warnc(bsdar, errno, "can't open file: %s", name); 117176434Skaiw free(obj); 118176434Skaiw return(NULL); 119176434Skaiw } 120176434Skaiw 121176434Skaiw if ((bname = basename(name)) == NULL) 122176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed"); 123176434Skaiw if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) { 124176434Skaiw if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL) 125176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 126176434Skaiw (void)strncpy(obj->name, bname, _TRUNCATE_LEN); 127176434Skaiw obj->name[_TRUNCATE_LEN] = '\0'; 128176434Skaiw } else 129176434Skaiw if ((obj->name = strdup(bname)) == NULL) 130176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 131176434Skaiw 132176434Skaiw if (fstat(obj->fd, &sb) < 0) { 133176434Skaiw bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name); 134176434Skaiw goto giveup; 135176434Skaiw } 136176434Skaiw if (!S_ISREG(sb.st_mode)) { 137176434Skaiw bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name); 138176434Skaiw goto giveup; 139176434Skaiw } 140176434Skaiw 141176434Skaiw /* 142176434Skaiw * When option '-u' is specified and member is not newer than the 143176434Skaiw * existing one, the replace will not happen. While if mtime == 0, 144176434Skaiw * which indicates that this is to "replace a none exist member", 145176434Skaiw * the replace will proceed regardless of '-u'. 146176434Skaiw */ 147176434Skaiw if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime) 148176434Skaiw goto giveup; 149176434Skaiw 150176434Skaiw obj->uid = sb.st_uid; 151176434Skaiw obj->gid = sb.st_gid; 152176434Skaiw obj->md = sb.st_mode; 153176434Skaiw obj->size = sb.st_size; 154176434Skaiw obj->mtime = sb.st_mtime; 155176434Skaiw obj->dev = sb.st_dev; 156176434Skaiw obj->ino = sb.st_ino; 157176525Skaiw 158176525Skaiw if (obj->size == 0) { 159176525Skaiw obj->maddr = NULL; 160176525Skaiw return(obj); 161176525Skaiw } 162176525Skaiw 163176434Skaiw if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 164176434Skaiw MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 165176434Skaiw bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 166176434Skaiw goto giveup; 167176434Skaiw } 168176434Skaiw if (close(obj->fd) < 0) 169176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 170176434Skaiw obj->name); 171176434Skaiw 172176434Skaiw return(obj); 173176434Skaiw 174176434Skaiwgiveup: 175176434Skaiw if (close(obj->fd) < 0) 176176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 177176434Skaiw obj->name); 178176434Skaiw free(obj->name); 179176434Skaiw free(obj); 180176434Skaiw return(NULL); 181176434Skaiw} 182176434Skaiw 183176434Skaiw/* 184176434Skaiw * Insert obj to the tail, or before/after the pos obj. 185176434Skaiw */ 186176434Skaiwstatic void 187176434Skaiwinsert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 188176434Skaiw{ 189176434Skaiw if (obj == NULL) 190176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 191176434Skaiw 192176434Skaiw if (pos == NULL || obj == pos) 193176434Skaiw /* 194176434Skaiw * If the object to move happens to be the posistion obj, 195176434Skaiw * or if there is not a pos obj, move it to tail. 196176434Skaiw */ 197176434Skaiw goto tail; 198176434Skaiw 199176434Skaiw if (bsdar->options & AR_B) { 200176434Skaiw TAILQ_INSERT_BEFORE(pos, obj, objs); 201176434Skaiw return; 202176434Skaiw } 203176434Skaiw if (bsdar->options & AR_A) { 204176434Skaiw TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 205176434Skaiw return; 206176434Skaiw } 207176434Skaiw 208176434Skaiwtail: 209176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 210176434Skaiw 211176434Skaiw} 212176434Skaiw 213176434Skaiw/* 214176434Skaiw * Determine the constitution of resulting archive. 215176434Skaiw */ 216176434Skaiwstatic void 217176434Skaiwwrite_archive(struct bsdar *bsdar, char mode) 218176434Skaiw{ 219176434Skaiw struct archive *a; 220176434Skaiw struct archive_entry *entry; 221176434Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 222176434Skaiw struct stat sb; 223176434Skaiw const char *name; 224176434Skaiw const char *bname; 225176434Skaiw char *buff; 226176434Skaiw char **av; 227176434Skaiw size_t size; 228176434Skaiw int i, r; 229176434Skaiw 230176434Skaiw TAILQ_INIT(&bsdar->v_obj); 231176434Skaiw nobj = NULL; 232176434Skaiw pos = NULL; 233176434Skaiw memset(&sb, 0, sizeof(sb)); 234176434Skaiw 235176434Skaiw /* By default, no compression is assumed. */ 236176434Skaiw bsdar->compression = ARCHIVE_COMPRESSION_NONE; 237176434Skaiw 238176434Skaiw /* 239176434Skaiw * Test if the specified archive exists, to figure out 240176434Skaiw * whether we are creating one here. 241176434Skaiw */ 242176434Skaiw if (stat(bsdar->filename, &sb) != 0) { 243176434Skaiw if (errno != ENOENT) { 244176434Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 245176434Skaiw bsdar->filename); 246176434Skaiw return; 247176434Skaiw } 248176434Skaiw 249176434Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 250176434Skaiw if (mode != 'r') { 251176434Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 252176434Skaiw bsdar->filename); 253176434Skaiw return; 254176434Skaiw } 255176434Skaiw 256176434Skaiw /* Issue a warning if -c is not specified when creating. */ 257176434Skaiw if (!(bsdar->options & AR_C)) 258176434Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 259176434Skaiw goto new_archive; 260176434Skaiw } 261176434Skaiw 262176434Skaiw /* 263176434Skaiw * First read members from existing archive. 264176434Skaiw */ 265176434Skaiw if ((a = archive_read_new()) == NULL) 266176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 267176434Skaiw archive_read_support_compression_all(a); 268176434Skaiw archive_read_support_format_ar(a); 269176434Skaiw AC(archive_read_open_filename(a, bsdar->filename, DEF_BLKSZ)); 270176434Skaiw for (;;) { 271176434Skaiw r = archive_read_next_header(a, &entry); 272176434Skaiw if (r == ARCHIVE_FATAL) 273176434Skaiw bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 274176434Skaiw archive_error_string(a)); 275176434Skaiw if (r == ARCHIVE_EOF) 276176434Skaiw break; 277176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 278176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 279176434Skaiw if (r == ARCHIVE_RETRY) { 280176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 281176434Skaiw continue; 282176434Skaiw } 283176434Skaiw 284176434Skaiw /* 285176434Skaiw * Remember the compression mode of existing archive. 286176434Skaiw * If neither -j nor -z is specified, this mode will 287176434Skaiw * be used for resulting archive. 288176434Skaiw */ 289176434Skaiw bsdar->compression = archive_compression(a); 290176434Skaiw 291176434Skaiw name = archive_entry_pathname(entry); 292176434Skaiw 293176434Skaiw /* 294176434Skaiw * skip pseudo members. 295176434Skaiw */ 296176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 297176434Skaiw continue; 298176434Skaiw 299176434Skaiw size = archive_entry_size(entry); 300176434Skaiw 301176434Skaiw if ((buff = malloc(size)) == NULL) 302176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 303176434Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 304176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 305176434Skaiw free(buff); 306176434Skaiw continue; 307176434Skaiw } 308176434Skaiw obj = malloc(sizeof(struct ar_obj)); 309176434Skaiw if (obj == NULL) 310176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 311176434Skaiw obj->maddr = buff; 312176434Skaiw if ((obj->name = strdup(name)) == NULL) 313176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 314176434Skaiw obj->size = size; 315176434Skaiw obj->uid = archive_entry_uid(entry); 316176434Skaiw obj->gid = archive_entry_gid(entry); 317176434Skaiw obj->md = archive_entry_mode(entry); 318176434Skaiw obj->mtime = archive_entry_mtime(entry); 319176434Skaiw obj->dev = 0; 320176434Skaiw obj->ino = 0; 321176434Skaiw 322176434Skaiw /* 323176434Skaiw * Objects from archive have obj->fd set to -1, 324176434Skaiw * for the ease of cleaning up. 325176434Skaiw */ 326176434Skaiw obj->fd = -1; 327176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 328176434Skaiw } 329176434Skaiw AC(archive_read_close(a)); 330176434Skaiw AC(archive_read_finish(a)); 331176434Skaiw 332176434Skaiw /* 333176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 334176434Skaiw */ 335176434Skaiw if (mode == 's') 336176434Skaiw goto write_objs; 337176434Skaiw 338176434Skaiw /* 339176434Skaiw * Try to find the position member specified by user. 340176434Skaiw */ 341176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 342176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 343176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 344176434Skaiw pos = obj; 345176434Skaiw break; 346176434Skaiw } 347176434Skaiw } 348176434Skaiw 349176434Skaiw /* 350176434Skaiw * If can't find `pos' specified by user, 351176434Skaiw * sliently insert objects at tail. 352176434Skaiw */ 353176434Skaiw if (pos == NULL) 354176434Skaiw bsdar->options &= ~(AR_A | AR_B); 355176434Skaiw } 356176434Skaiw 357176434Skaiw for (i = 0; i < bsdar->argc; i++) { 358176434Skaiw av = &bsdar->argv[i]; 359176434Skaiw 360176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 361176434Skaiw if ((bname = basename(*av)) == NULL) 362176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 363176434Skaiw "basename failed"); 364176434Skaiw if (bsdar->options & AR_TR) { 365176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 366176434Skaiw continue; 367176434Skaiw } else 368176434Skaiw if (strcmp(bname, obj->name) != 0) 369176434Skaiw continue; 370176434Skaiw 371176434Skaiw if (mode == 'r') { 372176434Skaiw /* 373176434Skaiw * if the new member is not qualified 374176434Skaiw * to replace the old one, skip it. 375176434Skaiw */ 376176434Skaiw nobj = create_obj_from_file(bsdar, *av, 377176434Skaiw obj->mtime); 378176434Skaiw if (nobj == NULL) 379176434Skaiw goto skip_obj; 380176434Skaiw } 381176434Skaiw 382176434Skaiw if (bsdar->options & AR_V) 383176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 384176434Skaiw *av); 385176434Skaiw 386176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 387176434Skaiw if (mode == 'd' || mode == 'r') { 388176434Skaiw free(obj->maddr); 389176434Skaiw free(obj->name); 390176434Skaiw free(obj); 391176434Skaiw } 392176434Skaiw 393176434Skaiw if (mode == 'm') 394176434Skaiw insert_obj(bsdar, obj, pos); 395176434Skaiw if (mode == 'r') 396176434Skaiw insert_obj(bsdar, nobj, pos); 397176434Skaiw 398176434Skaiw skip_obj: 399176434Skaiw *av = NULL; 400176434Skaiw break; 401176434Skaiw } 402176434Skaiw 403176434Skaiw } 404176434Skaiw 405176434Skaiwnew_archive: 406176434Skaiw /* 407176434Skaiw * When operating in mode 'r', directly add those user specified 408176434Skaiw * objects which do not exist in current archive. 409176434Skaiw */ 410176434Skaiw for (i = 0; i < bsdar->argc; i++) { 411176434Skaiw av = &bsdar->argv[i]; 412176434Skaiw if (*av != NULL && mode == 'r') { 413176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 414176434Skaiw if (nobj != NULL) 415176434Skaiw insert_obj(bsdar, nobj, pos); 416176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 417176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 418176434Skaiw *av = NULL; 419176434Skaiw } 420176434Skaiw } 421176434Skaiw 422176434Skaiwwrite_objs: 423176434Skaiw write_objs(bsdar); 424176434Skaiw write_cleanup(bsdar); 425176434Skaiw} 426176434Skaiw 427176434Skaiw/* 428176434Skaiw * Memory cleaning up. 429176434Skaiw */ 430176434Skaiwstatic void 431176434Skaiwwrite_cleanup(struct bsdar *bsdar) 432176434Skaiw{ 433176434Skaiw struct ar_obj *obj, *obj_temp; 434176434Skaiw 435176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 436176434Skaiw if (obj->fd == -1) 437176434Skaiw free(obj->maddr); 438176434Skaiw else 439176525Skaiw if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 440176434Skaiw bsdar_warnc(bsdar, errno, 441176434Skaiw "can't munmap file: %s", obj->name); 442176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 443176525Skaiw free(obj->name); 444176434Skaiw free(obj); 445176434Skaiw } 446176434Skaiw 447176434Skaiw free(bsdar->as); 448176434Skaiw free(bsdar->s_so); 449176434Skaiw free(bsdar->s_sn); 450176434Skaiw bsdar->as = NULL; 451176434Skaiw bsdar->s_so = NULL; 452176434Skaiw bsdar->s_sn = NULL; 453176434Skaiw} 454176434Skaiw 455176434Skaiw/* 456176434Skaiw * Wrapper for archive_write_data(). 457176434Skaiw */ 458176434Skaiwstatic void 459176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 460176434Skaiw{ 461176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 462176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 463176434Skaiw archive_error_string(a)); 464176434Skaiw} 465176434Skaiw 466176434Skaiw/* 467176434Skaiw * Write the resulting archive members. 468176434Skaiw */ 469176434Skaiwstatic void 470176434Skaiwwrite_objs(struct bsdar *bsdar) 471176434Skaiw{ 472176434Skaiw struct ar_obj *obj; 473176434Skaiw struct archive *a; 474176434Skaiw struct archive_entry *entry; 475176434Skaiw size_t s_sz; /* size of archive symbol table. */ 476176434Skaiw size_t pm_sz; /* size of pseudo members */ 477176434Skaiw int i, nr; 478176434Skaiw 479176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 480176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 481176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 482176434Skaiw 483176434Skaiw bsdar->rela_off = 0; 484176434Skaiw 485176434Skaiw /* Create archive symbol table and archive string table, if need. */ 486176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 487176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 488176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 489176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 490176434Skaiw add_to_ar_str_table(bsdar, obj->name); 491176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 492176434Skaiw } 493176434Skaiw 494176434Skaiw /* 495176434Skaiw * Pad the symbol name string table. It is treated specially because 496176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 497176434Skaiw * for other members. The size of sn table includes the pad bit. 498176434Skaiw */ 499176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 500176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 501176434Skaiw 502176434Skaiw /* 503176434Skaiw * Archive string table is padded by a "\n" as the normal members. 504176434Skaiw * The differece is that the size of archive string table counts 505176434Skaiw * in the pad bit, while normal members' size fileds do not. 506176434Skaiw */ 507176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 508176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 509176434Skaiw 510176434Skaiw /* 511176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 512176434Skaiw * covert previously stored relative offsets to absolute ones, and 513176434Skaiw * then make them Big Endian. 514176434Skaiw * 515176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 516176434Skaiw */ 517176434Skaiw 518176434Skaiw if (bsdar->s_cnt != 0) { 519176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 520176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 521176434Skaiw if (bsdar->as != NULL) 522176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 523176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 524176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 525176434Skaiw pm_sz); 526176434Skaiw } 527176434Skaiw 528176434Skaiw if ((a = archive_write_new()) == NULL) 529176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 530176434Skaiw 531176434Skaiw archive_write_set_format_ar_svr4(a); 532176434Skaiw 533176434Skaiw /* The compression mode of the existing archive is used 534176434Skaiw * for the result archive or if creating a new archive, we 535176434Skaiw * do not compress archive by default. This default behavior can 536176434Skaiw * be overrided by compression mode specified explicitly 537176434Skaiw * through command line option `-j' or `-z'. 538176434Skaiw */ 539176434Skaiw if (bsdar->options & AR_J) 540176434Skaiw bsdar->compression = ARCHIVE_COMPRESSION_BZIP2; 541176434Skaiw if (bsdar->options & AR_Z) 542176434Skaiw bsdar->compression = ARCHIVE_COMPRESSION_GZIP; 543176434Skaiw if (bsdar->compression == ARCHIVE_COMPRESSION_BZIP2) 544176434Skaiw archive_write_set_compression_bzip2(a); 545176434Skaiw else if (bsdar->compression == ARCHIVE_COMPRESSION_GZIP) 546176434Skaiw archive_write_set_compression_gzip(a); 547176434Skaiw else 548176434Skaiw archive_write_set_compression_none(a); 549176434Skaiw 550176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 551176434Skaiw 552176434Skaiw /* 553176434Skaiw * write the archive symbol table, if there is one. 554176434Skaiw * If options -s is explicitly specified or we are invoked 555176434Skaiw * as ranlib, write the symbol table even if it is empty. 556176434Skaiw */ 557176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 558176434Skaiw bsdar->options & AR_S) { 559176434Skaiw entry = archive_entry_new(); 560176434Skaiw archive_entry_copy_pathname(entry, "/"); 561176434Skaiw archive_entry_set_mtime(entry, time(NULL), 0); 562176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 563176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 564176434Skaiw AC(archive_write_header(a, entry)); 565176434Skaiw nr = htobe32(bsdar->s_cnt); 566176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 567176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 568176434Skaiw bsdar->s_cnt); 569176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 570176434Skaiw archive_entry_free(entry); 571176434Skaiw } 572176434Skaiw 573176434Skaiw /* write the archive string table, if any. */ 574176434Skaiw if (bsdar->as != NULL) { 575176434Skaiw entry = archive_entry_new(); 576176434Skaiw archive_entry_copy_pathname(entry, "//"); 577176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 578176434Skaiw AC(archive_write_header(a, entry)); 579176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 580176434Skaiw archive_entry_free(entry); 581176434Skaiw } 582176434Skaiw 583176434Skaiw /* write normal members. */ 584176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 585176434Skaiw entry = archive_entry_new(); 586176434Skaiw archive_entry_copy_pathname(entry, obj->name); 587176434Skaiw archive_entry_set_uid(entry, obj->uid); 588176434Skaiw archive_entry_set_gid(entry, obj->gid); 589176434Skaiw archive_entry_set_mode(entry, obj->md); 590176434Skaiw archive_entry_set_size(entry, obj->size); 591176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 592176434Skaiw archive_entry_set_dev(entry, obj->dev); 593176434Skaiw archive_entry_set_ino(entry, obj->ino); 594176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 595176434Skaiw AC(archive_write_header(a, entry)); 596176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 597176434Skaiw archive_entry_free(entry); 598176434Skaiw } 599176434Skaiw 600176434Skaiw AC(archive_write_close(a)); 601176434Skaiw AC(archive_write_finish(a)); 602176434Skaiw} 603176434Skaiw 604176434Skaiw/* 605176434Skaiw * Extract global symbols from ELF binary members. 606176434Skaiw */ 607176434Skaiwstatic void 608176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 609176434Skaiw{ 610176434Skaiw Elf *e; 611176434Skaiw Elf_Scn *scn; 612176434Skaiw GElf_Shdr shdr; 613176434Skaiw GElf_Sym sym; 614176434Skaiw Elf_Data *data; 615176434Skaiw char *name; 616176434Skaiw size_t n, shstrndx; 617176434Skaiw int elferr, tabndx, len, i; 618176434Skaiw 619176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 620176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 621176434Skaiw elf_errmsg(-1)); 622176434Skaiw return; 623176434Skaiw } 624176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 625176434Skaiw /* Sliently ignore non-elf member. */ 626176434Skaiw elf_end(e); 627176434Skaiw return; 628176434Skaiw } 629176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 630176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 631176434Skaiw elf_errmsg(-1)); 632176434Skaiw elf_end(e); 633176434Skaiw return; 634176434Skaiw } 635176434Skaiw 636176434Skaiw tabndx = -1; 637176434Skaiw scn = NULL; 638176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 639176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 640176434Skaiw bsdar_warnc(bsdar, 0, 641176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 642176434Skaiw continue; 643176434Skaiw } 644176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 645176434Skaiw bsdar_warnc(bsdar, 0, 646176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 647176434Skaiw continue; 648176434Skaiw } 649176434Skaiw if (strcmp(name, ".strtab") == 0) { 650176434Skaiw tabndx = elf_ndxscn(scn); 651176434Skaiw break; 652176434Skaiw } 653176434Skaiw } 654176434Skaiw elferr = elf_errno(); 655176434Skaiw if (elferr != 0) 656176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 657176434Skaiw elf_errmsg(elferr)); 658176434Skaiw if (tabndx == -1) { 659176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 660176434Skaiw elf_end(e); 661176434Skaiw return; 662176434Skaiw } 663176434Skaiw 664176434Skaiw scn = NULL; 665176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 666176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 667176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 668176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 669176434Skaiw continue; 670176434Skaiw } 671176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 672176434Skaiw continue; 673176434Skaiw 674176434Skaiw data = NULL; 675176434Skaiw n = 0; 676176434Skaiw while (n < shdr.sh_size && 677176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 678176434Skaiw len = data->d_size / shdr.sh_entsize; 679176434Skaiw for (i = 0; i < len; i++) { 680176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 681176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 682176434Skaiw "gelf_getsym failed: %s", 683176434Skaiw elf_errmsg(-1)); 684176434Skaiw continue; 685176434Skaiw } 686176434Skaiw 687176434Skaiw /* keep only global or weak symbols */ 688176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 689176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 690176434Skaiw continue; 691176434Skaiw 692176434Skaiw /* keep only defined symbols */ 693176434Skaiw if (sym.st_shndx == SHN_UNDEF) 694176434Skaiw continue; 695176434Skaiw 696176434Skaiw if ((name = elf_strptr(e, tabndx, 697176434Skaiw sym.st_name)) == NULL) { 698176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 699176434Skaiw "elf_strptr failed: %s", 700176434Skaiw elf_errmsg(-1)); 701176434Skaiw continue; 702176434Skaiw } 703176434Skaiw 704176434Skaiw add_to_ar_sym_table(bsdar, name); 705176434Skaiw } 706176434Skaiw } 707176434Skaiw } 708176434Skaiw elferr = elf_errno(); 709176434Skaiw if (elferr != 0) 710176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 711176434Skaiw elf_errmsg(elferr)); 712176434Skaiw 713176434Skaiw elf_end(e); 714176434Skaiw} 715176434Skaiw 716176434Skaiw/* 717176434Skaiw * Append to the archive string table buffer. 718176434Skaiw */ 719176434Skaiwstatic void 720176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 721176434Skaiw{ 722176434Skaiw 723176434Skaiw if (bsdar->as == NULL) { 724176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 725176434Skaiw bsdar->as_sz = 0; 726176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 727176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 728176434Skaiw } 729176434Skaiw 730176434Skaiw /* 731176434Skaiw * The space required for holding one member name in as table includes: 732176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 733176434Skaiw */ 734176434Skaiw if (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 735176434Skaiw bsdar->as_cap *= 2; 736176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 737176434Skaiw if (bsdar->as == NULL) 738176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 739176434Skaiw } 740176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 741176434Skaiw bsdar->as_sz += strlen(name); 742176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 743176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 744176434Skaiw} 745176434Skaiw 746176434Skaiw/* 747176434Skaiw * Append to the archive symbol table buffer. 748176434Skaiw */ 749176434Skaiwstatic void 750176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 751176434Skaiw{ 752176434Skaiw 753176434Skaiw if (bsdar->s_so == NULL) { 754176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 755176434Skaiw NULL) 756176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 757176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 758176434Skaiw bsdar->s_cnt = 0; 759176434Skaiw } 760176434Skaiw 761176434Skaiw if (bsdar->s_sn == NULL) { 762176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 763176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 764176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 765176434Skaiw bsdar->s_sn_sz = 0; 766176434Skaiw } 767176434Skaiw 768176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 769176434Skaiw bsdar->s_so_cap *= 2; 770176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 771176434Skaiw if (bsdar->s_so == NULL) 772176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 773176434Skaiw } 774176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 775176434Skaiw bsdar->s_cnt++; 776176434Skaiw 777176434Skaiw /* 778176434Skaiw * The space required for holding one symbol name in sn table includes: 779176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 780176434Skaiw */ 781176434Skaiw if (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 782176434Skaiw bsdar->s_sn_cap *= 2; 783176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 784176434Skaiw if (bsdar->s_sn == NULL) 785176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 786176434Skaiw } 787176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 788176434Skaiw bsdar->s_sn_sz += strlen(name); 789176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 790176434Skaiw} 791