write.c revision 183218
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 183218 2008-09-20 22:10:10Z 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); 63183218Skaiwstatic void read_objs(struct bsdar *bsdar, const char *archive, 64183218Skaiw int checkargv); 65176434Skaiwstatic void write_archive(struct bsdar *bsdar, char mode); 66176434Skaiwstatic void write_cleanup(struct bsdar *bsdar); 67176434Skaiwstatic void write_data(struct bsdar *bsdar, struct archive *a, 68176434Skaiw const void *buf, size_t s); 69176434Skaiwstatic void write_objs(struct bsdar *bsdar); 70176434Skaiw 71176434Skaiwvoid 72176434Skaiwar_mode_d(struct bsdar *bsdar) 73176434Skaiw{ 74176434Skaiw 75176434Skaiw write_archive(bsdar, 'd'); 76176434Skaiw} 77176434Skaiw 78176434Skaiwvoid 79176434Skaiwar_mode_m(struct bsdar *bsdar) 80176434Skaiw{ 81176434Skaiw 82176434Skaiw write_archive(bsdar, 'm'); 83176434Skaiw} 84176434Skaiw 85176434Skaiwvoid 86177064Skaiwar_mode_q(struct bsdar *bsdar) 87177064Skaiw{ 88177064Skaiw 89177064Skaiw write_archive(bsdar, 'q'); 90177064Skaiw} 91177064Skaiw 92177064Skaiwvoid 93176434Skaiwar_mode_r(struct bsdar *bsdar) 94176434Skaiw{ 95176434Skaiw 96176434Skaiw write_archive(bsdar, 'r'); 97176434Skaiw} 98176434Skaiw 99176434Skaiwvoid 100176434Skaiwar_mode_s(struct bsdar *bsdar) 101176434Skaiw{ 102176434Skaiw 103176434Skaiw write_archive(bsdar, 's'); 104176434Skaiw} 105176434Skaiw 106183218Skaiwvoid 107183218Skaiwar_mode_A(struct bsdar *bsdar) 108183218Skaiw{ 109183218Skaiw 110183218Skaiw write_archive(bsdar, 'A'); 111183218Skaiw} 112183218Skaiw 113176434Skaiw/* 114176434Skaiw * Create object from file, return created obj upon success, or NULL 115176434Skaiw * when an error occurs or the member is not newer than existing 116176434Skaiw * one while -u is specifed. 117176434Skaiw */ 118176434Skaiwstatic struct ar_obj * 119176434Skaiwcreate_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime) 120176434Skaiw{ 121176434Skaiw struct ar_obj *obj; 122176434Skaiw struct stat sb; 123176434Skaiw const char *bname; 124176434Skaiw 125176434Skaiw if (name == NULL) 126176528Skaiw return (NULL); 127176434Skaiw 128176434Skaiw obj = malloc(sizeof(struct ar_obj)); 129176434Skaiw if (obj == NULL) 130176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 131176434Skaiw if ((obj->fd = open(name, O_RDONLY, 0)) < 0) { 132176434Skaiw bsdar_warnc(bsdar, errno, "can't open file: %s", name); 133176434Skaiw free(obj); 134176528Skaiw return (NULL); 135176434Skaiw } 136176434Skaiw 137176434Skaiw if ((bname = basename(name)) == NULL) 138176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed"); 139176434Skaiw if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) { 140176434Skaiw if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL) 141176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 142176434Skaiw (void)strncpy(obj->name, bname, _TRUNCATE_LEN); 143176434Skaiw obj->name[_TRUNCATE_LEN] = '\0'; 144176434Skaiw } else 145176434Skaiw if ((obj->name = strdup(bname)) == NULL) 146176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 147176434Skaiw 148176434Skaiw if (fstat(obj->fd, &sb) < 0) { 149176434Skaiw bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name); 150176434Skaiw goto giveup; 151176434Skaiw } 152176434Skaiw if (!S_ISREG(sb.st_mode)) { 153176434Skaiw bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name); 154176434Skaiw goto giveup; 155176434Skaiw } 156176434Skaiw 157176434Skaiw /* 158176434Skaiw * When option '-u' is specified and member is not newer than the 159176434Skaiw * existing one, the replace will not happen. While if mtime == 0, 160176434Skaiw * which indicates that this is to "replace a none exist member", 161176434Skaiw * the replace will proceed regardless of '-u'. 162176434Skaiw */ 163176434Skaiw if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime) 164176434Skaiw goto giveup; 165176434Skaiw 166176434Skaiw obj->uid = sb.st_uid; 167176434Skaiw obj->gid = sb.st_gid; 168176434Skaiw obj->md = sb.st_mode; 169176434Skaiw obj->size = sb.st_size; 170176434Skaiw obj->mtime = sb.st_mtime; 171176434Skaiw obj->dev = sb.st_dev; 172176434Skaiw obj->ino = sb.st_ino; 173176525Skaiw 174176525Skaiw if (obj->size == 0) { 175176525Skaiw obj->maddr = NULL; 176176528Skaiw return (obj); 177176525Skaiw } 178176525Skaiw 179176434Skaiw if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 180176434Skaiw MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 181176434Skaiw bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 182176434Skaiw goto giveup; 183176434Skaiw } 184176434Skaiw if (close(obj->fd) < 0) 185176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 186176434Skaiw obj->name); 187176434Skaiw 188176528Skaiw return (obj); 189176434Skaiw 190176434Skaiwgiveup: 191176434Skaiw if (close(obj->fd) < 0) 192176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 193176434Skaiw obj->name); 194176434Skaiw free(obj->name); 195176434Skaiw free(obj); 196176528Skaiw return (NULL); 197176434Skaiw} 198176434Skaiw 199176434Skaiw/* 200176434Skaiw * Insert obj to the tail, or before/after the pos obj. 201176434Skaiw */ 202176434Skaiwstatic void 203176434Skaiwinsert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 204176434Skaiw{ 205176434Skaiw if (obj == NULL) 206176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 207176434Skaiw 208176434Skaiw if (pos == NULL || obj == pos) 209176434Skaiw /* 210176434Skaiw * If the object to move happens to be the posistion obj, 211176434Skaiw * or if there is not a pos obj, move it to tail. 212176434Skaiw */ 213176434Skaiw goto tail; 214176434Skaiw 215176434Skaiw if (bsdar->options & AR_B) { 216176434Skaiw TAILQ_INSERT_BEFORE(pos, obj, objs); 217176434Skaiw return; 218176434Skaiw } 219176434Skaiw if (bsdar->options & AR_A) { 220176434Skaiw TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 221176434Skaiw return; 222176434Skaiw } 223176434Skaiw 224176434Skaiwtail: 225176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 226176434Skaiw 227176434Skaiw} 228176434Skaiw 229176434Skaiw/* 230183218Skaiw * Read objects from archive into v_obj list. Note that checkargv is 231183218Skaiw * set when read_objs is used to read objects from the target of 232183218Skaiw * ADDLIB command (ar script mode), in this case argv array possibly 233183218Skaiw * specifies the members ADDLIB want. 234176434Skaiw */ 235176434Skaiwstatic void 236183218Skaiwread_objs(struct bsdar *bsdar, const char *archive, int checkargv) 237176434Skaiw{ 238176434Skaiw struct archive *a; 239176434Skaiw struct archive_entry *entry; 240183218Skaiw struct ar_obj *obj; 241176434Skaiw const char *name; 242176434Skaiw const char *bname; 243176434Skaiw char *buff; 244176434Skaiw char **av; 245176434Skaiw size_t size; 246183218Skaiw int i, r, find; 247176434Skaiw 248176434Skaiw if ((a = archive_read_new()) == NULL) 249176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 250176434Skaiw archive_read_support_compression_all(a); 251176434Skaiw archive_read_support_format_ar(a); 252183218Skaiw AC(archive_read_open_filename(a, archive, DEF_BLKSZ)); 253176434Skaiw for (;;) { 254176434Skaiw r = archive_read_next_header(a, &entry); 255176434Skaiw if (r == ARCHIVE_FATAL) 256176434Skaiw bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 257176434Skaiw archive_error_string(a)); 258176434Skaiw if (r == ARCHIVE_EOF) 259176434Skaiw break; 260176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 261176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 262176434Skaiw if (r == ARCHIVE_RETRY) { 263176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 264176434Skaiw continue; 265176434Skaiw } 266176434Skaiw 267176434Skaiw /* 268176434Skaiw * Remember the compression mode of existing archive. 269176434Skaiw * If neither -j nor -z is specified, this mode will 270176434Skaiw * be used for resulting archive. 271176434Skaiw */ 272176434Skaiw bsdar->compression = archive_compression(a); 273176434Skaiw 274176434Skaiw name = archive_entry_pathname(entry); 275176434Skaiw 276176434Skaiw /* 277176434Skaiw * skip pseudo members. 278176434Skaiw */ 279176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 280176434Skaiw continue; 281176434Skaiw 282183218Skaiw /* 283183218Skaiw * If checkargv is set, only read those members specified 284183218Skaiw * in argv. 285183218Skaiw */ 286183218Skaiw if (checkargv && bsdar->argc > 0) { 287183218Skaiw find = 0; 288183218Skaiw for(i = 0; i < bsdar->argc; i++) { 289183218Skaiw av = &bsdar->argv[i]; 290183218Skaiw if (*av == NULL) 291183218Skaiw continue; 292183218Skaiw if ((bname = basename(*av)) == NULL) 293183218Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 294183218Skaiw "basename failed"); 295183218Skaiw if (strcmp(bname, name) != 0) 296183218Skaiw continue; 297183218Skaiw 298183218Skaiw *av = NULL; 299183218Skaiw find = 1; 300183218Skaiw break; 301183218Skaiw } 302183218Skaiw if (!find) 303183218Skaiw continue; 304183218Skaiw } 305183218Skaiw 306176434Skaiw size = archive_entry_size(entry); 307176434Skaiw 308176728Skaiw if (size > 0) { 309176728Skaiw if ((buff = malloc(size)) == NULL) 310176728Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 311176728Skaiw "malloc failed"); 312176728Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 313176728Skaiw bsdar_warnc(bsdar, 0, "%s", 314176728Skaiw archive_error_string(a)); 315176728Skaiw free(buff); 316176728Skaiw continue; 317176728Skaiw } 318176728Skaiw } else 319176728Skaiw buff = NULL; 320176728Skaiw 321176434Skaiw obj = malloc(sizeof(struct ar_obj)); 322176434Skaiw if (obj == NULL) 323176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 324176434Skaiw obj->maddr = buff; 325176434Skaiw if ((obj->name = strdup(name)) == NULL) 326176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 327176434Skaiw obj->size = size; 328176434Skaiw obj->uid = archive_entry_uid(entry); 329176434Skaiw obj->gid = archive_entry_gid(entry); 330176434Skaiw obj->md = archive_entry_mode(entry); 331176434Skaiw obj->mtime = archive_entry_mtime(entry); 332176434Skaiw obj->dev = 0; 333176434Skaiw obj->ino = 0; 334176434Skaiw 335176434Skaiw /* 336176434Skaiw * Objects from archive have obj->fd set to -1, 337176434Skaiw * for the ease of cleaning up. 338176434Skaiw */ 339176434Skaiw obj->fd = -1; 340176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 341176434Skaiw } 342176434Skaiw AC(archive_read_close(a)); 343176434Skaiw AC(archive_read_finish(a)); 344183218Skaiw} 345176434Skaiw 346183218Skaiw/* 347183218Skaiw * Determine the constitution of resulting archive. 348183218Skaiw */ 349183218Skaiwstatic void 350183218Skaiwwrite_archive(struct bsdar *bsdar, char mode) 351183218Skaiw{ 352183218Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 353183218Skaiw struct stat sb; 354183218Skaiw const char *bname; 355183218Skaiw char **av; 356183218Skaiw int i; 357183218Skaiw 358183218Skaiw TAILQ_INIT(&bsdar->v_obj); 359183218Skaiw nobj = NULL; 360183218Skaiw pos = NULL; 361183218Skaiw memset(&sb, 0, sizeof(sb)); 362183218Skaiw 363183218Skaiw /* By default, no compression is assumed. */ 364183218Skaiw bsdar->compression = ARCHIVE_COMPRESSION_NONE; 365183218Skaiw 366176434Skaiw /* 367183218Skaiw * Test if the specified archive exists, to figure out 368183218Skaiw * whether we are creating one here. 369183218Skaiw */ 370183218Skaiw if (stat(bsdar->filename, &sb) != 0) { 371183218Skaiw if (errno != ENOENT) { 372183218Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 373183218Skaiw bsdar->filename); 374183218Skaiw return; 375183218Skaiw } 376183218Skaiw 377183218Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 378183218Skaiw if (mode != 'r' && mode != 'q') { 379183218Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 380183218Skaiw bsdar->filename); 381183218Skaiw return; 382183218Skaiw } 383183218Skaiw 384183218Skaiw /* Issue a warning if -c is not specified when creating. */ 385183218Skaiw if (!(bsdar->options & AR_C)) 386183218Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 387183218Skaiw goto new_archive; 388183218Skaiw } 389183218Skaiw 390183218Skaiw /* 391183218Skaiw * First read members from existing archive. 392183218Skaiw */ 393183218Skaiw read_objs(bsdar, bsdar->filename, 0); 394183218Skaiw 395183218Skaiw /* 396176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 397176434Skaiw */ 398176434Skaiw if (mode == 's') 399176434Skaiw goto write_objs; 400176434Skaiw 401176434Skaiw /* 402177064Skaiw * For mode 'q', we don't need to adjust existing members either. 403177064Skaiw * Also, -a, -b and -i are ignored in this mode. New members are 404177064Skaiw * always inserted at tail. 405177064Skaiw */ 406177064Skaiw if (mode == 'q') 407177064Skaiw goto new_archive; 408177064Skaiw 409177064Skaiw /* 410183218Skaiw * Mode 'A' adds the contents of another archive to the tail of 411183218Skaiw * current archive. Note that mode 'A' is a special mode for the 412183218Skaiw * ADDLIB command of the ar script mode. Currently there is no 413183218Skaiw * access to this function from the ar command line mode. 414183218Skaiw */ 415183218Skaiw if (mode == 'A') { 416183218Skaiw /* 417183218Skaiw * Read objects from the target archive of ADDLIB command. 418183218Skaiw * If there are members spcified in argv, read those members 419183218Skaiw * only, otherwise the entire archive will be read. 420183218Skaiw */ 421183218Skaiw read_objs(bsdar, bsdar->addlib, 1); 422183218Skaiw goto write_objs; 423183218Skaiw } 424183218Skaiw 425183218Skaiw /* 426176434Skaiw * Try to find the position member specified by user. 427176434Skaiw */ 428176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 429176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 430176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 431176434Skaiw pos = obj; 432176434Skaiw break; 433176434Skaiw } 434176434Skaiw } 435176434Skaiw 436176434Skaiw /* 437176434Skaiw * If can't find `pos' specified by user, 438176434Skaiw * sliently insert objects at tail. 439176434Skaiw */ 440176434Skaiw if (pos == NULL) 441176434Skaiw bsdar->options &= ~(AR_A | AR_B); 442176434Skaiw } 443176434Skaiw 444176434Skaiw for (i = 0; i < bsdar->argc; i++) { 445176434Skaiw av = &bsdar->argv[i]; 446176434Skaiw 447176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 448176434Skaiw if ((bname = basename(*av)) == NULL) 449176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 450176434Skaiw "basename failed"); 451176434Skaiw if (bsdar->options & AR_TR) { 452176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 453176434Skaiw continue; 454176434Skaiw } else 455176434Skaiw if (strcmp(bname, obj->name) != 0) 456176434Skaiw continue; 457176434Skaiw 458176434Skaiw if (mode == 'r') { 459176434Skaiw /* 460176434Skaiw * if the new member is not qualified 461176434Skaiw * to replace the old one, skip it. 462176434Skaiw */ 463176434Skaiw nobj = create_obj_from_file(bsdar, *av, 464176434Skaiw obj->mtime); 465176434Skaiw if (nobj == NULL) 466176434Skaiw goto skip_obj; 467176434Skaiw } 468176434Skaiw 469176434Skaiw if (bsdar->options & AR_V) 470176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 471176434Skaiw *av); 472176434Skaiw 473176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 474176434Skaiw if (mode == 'd' || mode == 'r') { 475176434Skaiw free(obj->maddr); 476176434Skaiw free(obj->name); 477176434Skaiw free(obj); 478176434Skaiw } 479176434Skaiw 480176434Skaiw if (mode == 'm') 481176434Skaiw insert_obj(bsdar, obj, pos); 482176434Skaiw if (mode == 'r') 483176434Skaiw insert_obj(bsdar, nobj, pos); 484176434Skaiw 485176434Skaiw skip_obj: 486176434Skaiw *av = NULL; 487176434Skaiw break; 488176434Skaiw } 489176434Skaiw 490176434Skaiw } 491176434Skaiw 492176434Skaiwnew_archive: 493176434Skaiw /* 494176434Skaiw * When operating in mode 'r', directly add those user specified 495177064Skaiw * objects which do not exist in current archive. When operating 496177064Skaiw * in mode 'q', all objects specified in command line args are 497177064Skaiw * appended to the archive, without comparing with existing ones. 498176434Skaiw */ 499176434Skaiw for (i = 0; i < bsdar->argc; i++) { 500176434Skaiw av = &bsdar->argv[i]; 501177064Skaiw if (*av != NULL && (mode == 'r' || mode == 'q')) { 502176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 503176434Skaiw if (nobj != NULL) 504176434Skaiw insert_obj(bsdar, nobj, pos); 505176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 506176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 507176434Skaiw *av = NULL; 508176434Skaiw } 509176434Skaiw } 510176434Skaiw 511176434Skaiwwrite_objs: 512176434Skaiw write_objs(bsdar); 513176434Skaiw write_cleanup(bsdar); 514176434Skaiw} 515176434Skaiw 516176434Skaiw/* 517176434Skaiw * Memory cleaning up. 518176434Skaiw */ 519176434Skaiwstatic void 520176434Skaiwwrite_cleanup(struct bsdar *bsdar) 521176434Skaiw{ 522176434Skaiw struct ar_obj *obj, *obj_temp; 523176434Skaiw 524176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 525176434Skaiw if (obj->fd == -1) 526176434Skaiw free(obj->maddr); 527176434Skaiw else 528176525Skaiw if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 529176434Skaiw bsdar_warnc(bsdar, errno, 530176434Skaiw "can't munmap file: %s", obj->name); 531176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 532176525Skaiw free(obj->name); 533176434Skaiw free(obj); 534176434Skaiw } 535176434Skaiw 536176434Skaiw free(bsdar->as); 537176434Skaiw free(bsdar->s_so); 538176434Skaiw free(bsdar->s_sn); 539176434Skaiw bsdar->as = NULL; 540176434Skaiw bsdar->s_so = NULL; 541176434Skaiw bsdar->s_sn = NULL; 542176434Skaiw} 543176434Skaiw 544176434Skaiw/* 545176434Skaiw * Wrapper for archive_write_data(). 546176434Skaiw */ 547176434Skaiwstatic void 548176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 549176434Skaiw{ 550176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 551176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 552176434Skaiw archive_error_string(a)); 553176434Skaiw} 554176434Skaiw 555176434Skaiw/* 556176434Skaiw * Write the resulting archive members. 557176434Skaiw */ 558176434Skaiwstatic void 559176434Skaiwwrite_objs(struct bsdar *bsdar) 560176434Skaiw{ 561176434Skaiw struct ar_obj *obj; 562176434Skaiw struct archive *a; 563176434Skaiw struct archive_entry *entry; 564176434Skaiw size_t s_sz; /* size of archive symbol table. */ 565176434Skaiw size_t pm_sz; /* size of pseudo members */ 566176434Skaiw int i, nr; 567176434Skaiw 568176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 569176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 570176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 571176434Skaiw 572176434Skaiw bsdar->rela_off = 0; 573176434Skaiw 574176434Skaiw /* Create archive symbol table and archive string table, if need. */ 575176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 576176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 577176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 578176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 579176434Skaiw add_to_ar_str_table(bsdar, obj->name); 580176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 581176434Skaiw } 582176434Skaiw 583176434Skaiw /* 584176434Skaiw * Pad the symbol name string table. It is treated specially because 585176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 586176434Skaiw * for other members. The size of sn table includes the pad bit. 587176434Skaiw */ 588176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 589176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 590176434Skaiw 591176434Skaiw /* 592176434Skaiw * Archive string table is padded by a "\n" as the normal members. 593176728Skaiw * The difference is that the size of archive string table counts 594176434Skaiw * in the pad bit, while normal members' size fileds do not. 595176434Skaiw */ 596176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 597176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 598176434Skaiw 599176434Skaiw /* 600176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 601176728Skaiw * convert previously stored relative offsets to absolute ones, and 602176434Skaiw * then make them Big Endian. 603176434Skaiw * 604176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 605176434Skaiw */ 606176434Skaiw 607176434Skaiw if (bsdar->s_cnt != 0) { 608176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 609176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 610176434Skaiw if (bsdar->as != NULL) 611176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 612176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 613176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 614176434Skaiw pm_sz); 615176434Skaiw } 616176434Skaiw 617176434Skaiw if ((a = archive_write_new()) == NULL) 618176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 619176434Skaiw 620176434Skaiw archive_write_set_format_ar_svr4(a); 621176434Skaiw 622176434Skaiw /* The compression mode of the existing archive is used 623176434Skaiw * for the result archive or if creating a new archive, we 624176434Skaiw * do not compress archive by default. This default behavior can 625176434Skaiw * be overrided by compression mode specified explicitly 626176434Skaiw * through command line option `-j' or `-z'. 627176434Skaiw */ 628176434Skaiw if (bsdar->options & AR_J) 629176434Skaiw bsdar->compression = ARCHIVE_COMPRESSION_BZIP2; 630176434Skaiw if (bsdar->options & AR_Z) 631176434Skaiw bsdar->compression = ARCHIVE_COMPRESSION_GZIP; 632176434Skaiw if (bsdar->compression == ARCHIVE_COMPRESSION_BZIP2) 633176434Skaiw archive_write_set_compression_bzip2(a); 634176434Skaiw else if (bsdar->compression == ARCHIVE_COMPRESSION_GZIP) 635176434Skaiw archive_write_set_compression_gzip(a); 636176434Skaiw else 637176434Skaiw archive_write_set_compression_none(a); 638176434Skaiw 639176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 640176434Skaiw 641176434Skaiw /* 642176434Skaiw * write the archive symbol table, if there is one. 643176434Skaiw * If options -s is explicitly specified or we are invoked 644176434Skaiw * as ranlib, write the symbol table even if it is empty. 645176434Skaiw */ 646176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 647176434Skaiw bsdar->options & AR_S) { 648176434Skaiw entry = archive_entry_new(); 649176434Skaiw archive_entry_copy_pathname(entry, "/"); 650176434Skaiw archive_entry_set_mtime(entry, time(NULL), 0); 651176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 652176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 653176434Skaiw AC(archive_write_header(a, entry)); 654176434Skaiw nr = htobe32(bsdar->s_cnt); 655176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 656176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 657176434Skaiw bsdar->s_cnt); 658176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 659176434Skaiw archive_entry_free(entry); 660176434Skaiw } 661176434Skaiw 662176434Skaiw /* write the archive string table, if any. */ 663176434Skaiw if (bsdar->as != NULL) { 664176434Skaiw entry = archive_entry_new(); 665176434Skaiw archive_entry_copy_pathname(entry, "//"); 666176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 667176434Skaiw AC(archive_write_header(a, entry)); 668176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 669176434Skaiw archive_entry_free(entry); 670176434Skaiw } 671176434Skaiw 672176434Skaiw /* write normal members. */ 673176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 674176434Skaiw entry = archive_entry_new(); 675176434Skaiw archive_entry_copy_pathname(entry, obj->name); 676176434Skaiw archive_entry_set_uid(entry, obj->uid); 677176434Skaiw archive_entry_set_gid(entry, obj->gid); 678176434Skaiw archive_entry_set_mode(entry, obj->md); 679176434Skaiw archive_entry_set_size(entry, obj->size); 680176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 681176434Skaiw archive_entry_set_dev(entry, obj->dev); 682176434Skaiw archive_entry_set_ino(entry, obj->ino); 683176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 684176434Skaiw AC(archive_write_header(a, entry)); 685176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 686176434Skaiw archive_entry_free(entry); 687176434Skaiw } 688176434Skaiw 689176434Skaiw AC(archive_write_close(a)); 690176434Skaiw AC(archive_write_finish(a)); 691176434Skaiw} 692176434Skaiw 693176434Skaiw/* 694176434Skaiw * Extract global symbols from ELF binary members. 695176434Skaiw */ 696176434Skaiwstatic void 697176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 698176434Skaiw{ 699176434Skaiw Elf *e; 700176434Skaiw Elf_Scn *scn; 701176434Skaiw GElf_Shdr shdr; 702176434Skaiw GElf_Sym sym; 703176434Skaiw Elf_Data *data; 704176434Skaiw char *name; 705176434Skaiw size_t n, shstrndx; 706176434Skaiw int elferr, tabndx, len, i; 707176434Skaiw 708176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 709176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 710176434Skaiw elf_errmsg(-1)); 711176434Skaiw return; 712176434Skaiw } 713176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 714176434Skaiw /* Sliently ignore non-elf member. */ 715176434Skaiw elf_end(e); 716176434Skaiw return; 717176434Skaiw } 718176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 719176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 720176434Skaiw elf_errmsg(-1)); 721176434Skaiw elf_end(e); 722176434Skaiw return; 723176434Skaiw } 724176434Skaiw 725176434Skaiw tabndx = -1; 726176434Skaiw scn = NULL; 727176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 728176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 729176434Skaiw bsdar_warnc(bsdar, 0, 730176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 731176434Skaiw continue; 732176434Skaiw } 733176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 734176434Skaiw bsdar_warnc(bsdar, 0, 735176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 736176434Skaiw continue; 737176434Skaiw } 738176434Skaiw if (strcmp(name, ".strtab") == 0) { 739176434Skaiw tabndx = elf_ndxscn(scn); 740176434Skaiw break; 741176434Skaiw } 742176434Skaiw } 743176434Skaiw elferr = elf_errno(); 744176434Skaiw if (elferr != 0) 745176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 746176434Skaiw elf_errmsg(elferr)); 747176434Skaiw if (tabndx == -1) { 748176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 749176434Skaiw elf_end(e); 750176434Skaiw return; 751176434Skaiw } 752176434Skaiw 753176434Skaiw scn = NULL; 754176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 755176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 756176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 757176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 758176434Skaiw continue; 759176434Skaiw } 760176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 761176434Skaiw continue; 762176434Skaiw 763176434Skaiw data = NULL; 764176434Skaiw n = 0; 765176434Skaiw while (n < shdr.sh_size && 766176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 767176434Skaiw len = data->d_size / shdr.sh_entsize; 768176434Skaiw for (i = 0; i < len; i++) { 769176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 770176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 771176434Skaiw "gelf_getsym failed: %s", 772176434Skaiw elf_errmsg(-1)); 773176434Skaiw continue; 774176434Skaiw } 775176434Skaiw 776176434Skaiw /* keep only global or weak symbols */ 777176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 778176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 779176434Skaiw continue; 780176434Skaiw 781176434Skaiw /* keep only defined symbols */ 782176434Skaiw if (sym.st_shndx == SHN_UNDEF) 783176434Skaiw continue; 784176434Skaiw 785176434Skaiw if ((name = elf_strptr(e, tabndx, 786176434Skaiw sym.st_name)) == NULL) { 787176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 788176434Skaiw "elf_strptr failed: %s", 789176434Skaiw elf_errmsg(-1)); 790176434Skaiw continue; 791176434Skaiw } 792176434Skaiw 793176434Skaiw add_to_ar_sym_table(bsdar, name); 794176434Skaiw } 795176434Skaiw } 796176434Skaiw } 797176434Skaiw elferr = elf_errno(); 798176434Skaiw if (elferr != 0) 799176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 800176434Skaiw elf_errmsg(elferr)); 801176434Skaiw 802176434Skaiw elf_end(e); 803176434Skaiw} 804176434Skaiw 805176434Skaiw/* 806176434Skaiw * Append to the archive string table buffer. 807176434Skaiw */ 808176434Skaiwstatic void 809176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 810176434Skaiw{ 811176434Skaiw 812176434Skaiw if (bsdar->as == NULL) { 813176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 814176434Skaiw bsdar->as_sz = 0; 815176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 816176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 817176434Skaiw } 818176434Skaiw 819176434Skaiw /* 820176434Skaiw * The space required for holding one member name in as table includes: 821176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 822176434Skaiw */ 823176728Skaiw while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 824176434Skaiw bsdar->as_cap *= 2; 825176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 826176434Skaiw if (bsdar->as == NULL) 827176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 828176434Skaiw } 829176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 830176434Skaiw bsdar->as_sz += strlen(name); 831176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 832176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 833176434Skaiw} 834176434Skaiw 835176434Skaiw/* 836176434Skaiw * Append to the archive symbol table buffer. 837176434Skaiw */ 838176434Skaiwstatic void 839176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 840176434Skaiw{ 841176434Skaiw 842176434Skaiw if (bsdar->s_so == NULL) { 843176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 844176434Skaiw NULL) 845176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 846176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 847176434Skaiw bsdar->s_cnt = 0; 848176434Skaiw } 849176434Skaiw 850176434Skaiw if (bsdar->s_sn == NULL) { 851176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 852176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 853176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 854176434Skaiw bsdar->s_sn_sz = 0; 855176434Skaiw } 856176434Skaiw 857176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 858176434Skaiw bsdar->s_so_cap *= 2; 859176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 860176434Skaiw if (bsdar->s_so == NULL) 861176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 862176434Skaiw } 863176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 864176434Skaiw bsdar->s_cnt++; 865176434Skaiw 866176434Skaiw /* 867176434Skaiw * The space required for holding one symbol name in sn table includes: 868176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 869176434Skaiw */ 870176728Skaiw while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 871176434Skaiw bsdar->s_sn_cap *= 2; 872176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 873176434Skaiw if (bsdar->s_sn == NULL) 874176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 875176434Skaiw } 876176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 877176434Skaiw bsdar->s_sn_sz += strlen(name); 878176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 879176434Skaiw} 880