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("$FreeBSD$"); 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); 61224650Semastestatic void free_obj(struct bsdar *bsdar, struct ar_obj *obj); 62176434Skaiwstatic void insert_obj(struct bsdar *bsdar, struct ar_obj *obj, 63176434Skaiw struct ar_obj *pos); 64183218Skaiwstatic void read_objs(struct bsdar *bsdar, const char *archive, 65183218Skaiw int checkargv); 66176434Skaiwstatic void write_archive(struct bsdar *bsdar, char mode); 67176434Skaiwstatic void write_cleanup(struct bsdar *bsdar); 68176434Skaiwstatic void write_data(struct bsdar *bsdar, struct archive *a, 69176434Skaiw const void *buf, size_t s); 70176434Skaiwstatic void write_objs(struct bsdar *bsdar); 71176434Skaiw 72176434Skaiwvoid 73176434Skaiwar_mode_d(struct bsdar *bsdar) 74176434Skaiw{ 75176434Skaiw 76176434Skaiw write_archive(bsdar, 'd'); 77176434Skaiw} 78176434Skaiw 79176434Skaiwvoid 80176434Skaiwar_mode_m(struct bsdar *bsdar) 81176434Skaiw{ 82176434Skaiw 83176434Skaiw write_archive(bsdar, 'm'); 84176434Skaiw} 85176434Skaiw 86176434Skaiwvoid 87177064Skaiwar_mode_q(struct bsdar *bsdar) 88177064Skaiw{ 89177064Skaiw 90177064Skaiw write_archive(bsdar, 'q'); 91177064Skaiw} 92177064Skaiw 93177064Skaiwvoid 94176434Skaiwar_mode_r(struct bsdar *bsdar) 95176434Skaiw{ 96176434Skaiw 97176434Skaiw write_archive(bsdar, 'r'); 98176434Skaiw} 99176434Skaiw 100176434Skaiwvoid 101176434Skaiwar_mode_s(struct bsdar *bsdar) 102176434Skaiw{ 103176434Skaiw 104176434Skaiw write_archive(bsdar, 's'); 105176434Skaiw} 106176434Skaiw 107183218Skaiwvoid 108183218Skaiwar_mode_A(struct bsdar *bsdar) 109183218Skaiw{ 110183218Skaiw 111183218Skaiw write_archive(bsdar, 'A'); 112183218Skaiw} 113183218Skaiw 114176434Skaiw/* 115176434Skaiw * Create object from file, return created obj upon success, or NULL 116176434Skaiw * when an error occurs or the member is not newer than existing 117222122Sbcr * one while -u is specified. 118176434Skaiw */ 119176434Skaiwstatic struct ar_obj * 120176434Skaiwcreate_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime) 121176434Skaiw{ 122176434Skaiw struct ar_obj *obj; 123176434Skaiw struct stat sb; 124176434Skaiw const char *bname; 125176434Skaiw 126176434Skaiw if (name == NULL) 127176528Skaiw return (NULL); 128176434Skaiw 129176434Skaiw obj = malloc(sizeof(struct ar_obj)); 130176434Skaiw if (obj == NULL) 131176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 132176434Skaiw if ((obj->fd = open(name, O_RDONLY, 0)) < 0) { 133176434Skaiw bsdar_warnc(bsdar, errno, "can't open file: %s", name); 134176434Skaiw free(obj); 135176528Skaiw return (NULL); 136176434Skaiw } 137176434Skaiw 138176434Skaiw if ((bname = basename(name)) == NULL) 139176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed"); 140176434Skaiw if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) { 141176434Skaiw if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL) 142176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 143176434Skaiw (void)strncpy(obj->name, bname, _TRUNCATE_LEN); 144176434Skaiw obj->name[_TRUNCATE_LEN] = '\0'; 145176434Skaiw } else 146176434Skaiw if ((obj->name = strdup(bname)) == NULL) 147176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 148176434Skaiw 149176434Skaiw if (fstat(obj->fd, &sb) < 0) { 150176434Skaiw bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name); 151176434Skaiw goto giveup; 152176434Skaiw } 153176434Skaiw if (!S_ISREG(sb.st_mode)) { 154176434Skaiw bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name); 155176434Skaiw goto giveup; 156176434Skaiw } 157176434Skaiw 158176434Skaiw /* 159176434Skaiw * When option '-u' is specified and member is not newer than the 160176434Skaiw * existing one, the replace will not happen. While if mtime == 0, 161176434Skaiw * which indicates that this is to "replace a none exist member", 162176434Skaiw * the replace will proceed regardless of '-u'. 163176434Skaiw */ 164176434Skaiw if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime) 165176434Skaiw goto giveup; 166176434Skaiw 167213643Skientzle /* 168213643Skientzle * When option '-D' is specified, mtime and UID / GID from the file 169213643Skientzle * will be replaced with 0, and file mode with 644. This ensures that 170213643Skientzle * checksums will match for two archives containing the exact same 171213643Skientzle * files. 172213643Skientzle */ 173213643Skientzle if (bsdar->options & AR_D) { 174213643Skientzle obj->uid = 0; 175213643Skientzle obj->gid = 0; 176213643Skientzle obj->mtime = 0; 177213643Skientzle obj->md = S_IFREG | 0644; 178213643Skientzle } else { 179213643Skientzle obj->uid = sb.st_uid; 180213643Skientzle obj->gid = sb.st_gid; 181213643Skientzle obj->mtime = sb.st_mtime; 182213643Skientzle obj->md = sb.st_mode; 183213643Skientzle } 184176434Skaiw obj->size = sb.st_size; 185176434Skaiw obj->dev = sb.st_dev; 186176434Skaiw obj->ino = sb.st_ino; 187176525Skaiw 188176525Skaiw if (obj->size == 0) { 189176525Skaiw obj->maddr = NULL; 190176528Skaiw return (obj); 191176525Skaiw } 192176525Skaiw 193176434Skaiw if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 194176434Skaiw MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 195176434Skaiw bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 196176434Skaiw goto giveup; 197176434Skaiw } 198176434Skaiw if (close(obj->fd) < 0) 199176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 200176434Skaiw obj->name); 201176434Skaiw 202176528Skaiw return (obj); 203176434Skaiw 204176434Skaiwgiveup: 205176434Skaiw if (close(obj->fd) < 0) 206176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 207176434Skaiw obj->name); 208176434Skaiw free(obj->name); 209176434Skaiw free(obj); 210176528Skaiw return (NULL); 211176434Skaiw} 212176434Skaiw 213176434Skaiw/* 214224650Semaste * Free object itself and its associated allocations. 215224650Semaste */ 216224650Semastestatic void 217224650Semastefree_obj(struct bsdar *bsdar, struct ar_obj *obj) 218224650Semaste{ 219224650Semaste if (obj->fd == -1) 220224650Semaste free(obj->maddr); 221224650Semaste else 222224650Semaste if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 223224650Semaste bsdar_warnc(bsdar, errno, 224224650Semaste "can't munmap file: %s", obj->name); 225224650Semaste free(obj->name); 226224650Semaste free(obj); 227224650Semaste} 228224650Semaste 229224650Semaste/* 230176434Skaiw * Insert obj to the tail, or before/after the pos obj. 231176434Skaiw */ 232176434Skaiwstatic void 233176434Skaiwinsert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 234176434Skaiw{ 235176434Skaiw if (obj == NULL) 236176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 237176434Skaiw 238176434Skaiw if (pos == NULL || obj == pos) 239176434Skaiw /* 240222122Sbcr * If the object to move happens to be the position obj, 241176434Skaiw * or if there is not a pos obj, move it to tail. 242176434Skaiw */ 243176434Skaiw goto tail; 244176434Skaiw 245176434Skaiw if (bsdar->options & AR_B) { 246176434Skaiw TAILQ_INSERT_BEFORE(pos, obj, objs); 247176434Skaiw return; 248176434Skaiw } 249176434Skaiw if (bsdar->options & AR_A) { 250176434Skaiw TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 251176434Skaiw return; 252176434Skaiw } 253176434Skaiw 254176434Skaiwtail: 255176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 256176434Skaiw 257176434Skaiw} 258176434Skaiw 259176434Skaiw/* 260183218Skaiw * Read objects from archive into v_obj list. Note that checkargv is 261183218Skaiw * set when read_objs is used to read objects from the target of 262183218Skaiw * ADDLIB command (ar script mode), in this case argv array possibly 263183218Skaiw * specifies the members ADDLIB want. 264176434Skaiw */ 265176434Skaiwstatic void 266183218Skaiwread_objs(struct bsdar *bsdar, const char *archive, int checkargv) 267176434Skaiw{ 268176434Skaiw struct archive *a; 269176434Skaiw struct archive_entry *entry; 270183218Skaiw struct ar_obj *obj; 271176434Skaiw const char *name; 272176434Skaiw const char *bname; 273176434Skaiw char *buff; 274176434Skaiw char **av; 275176434Skaiw size_t size; 276183218Skaiw int i, r, find; 277176434Skaiw 278176434Skaiw if ((a = archive_read_new()) == NULL) 279176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 280176434Skaiw archive_read_support_format_ar(a); 281183218Skaiw AC(archive_read_open_filename(a, archive, DEF_BLKSZ)); 282176434Skaiw for (;;) { 283176434Skaiw r = archive_read_next_header(a, &entry); 284176434Skaiw if (r == ARCHIVE_FATAL) 285176434Skaiw bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 286176434Skaiw archive_error_string(a)); 287176434Skaiw if (r == ARCHIVE_EOF) 288176434Skaiw break; 289176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 290176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 291176434Skaiw if (r == ARCHIVE_RETRY) { 292176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 293176434Skaiw continue; 294176434Skaiw } 295176434Skaiw 296176434Skaiw name = archive_entry_pathname(entry); 297176434Skaiw 298176434Skaiw /* 299176434Skaiw * skip pseudo members. 300176434Skaiw */ 301176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 302176434Skaiw continue; 303176434Skaiw 304183218Skaiw /* 305183218Skaiw * If checkargv is set, only read those members specified 306183218Skaiw * in argv. 307183218Skaiw */ 308183218Skaiw if (checkargv && bsdar->argc > 0) { 309183218Skaiw find = 0; 310183218Skaiw for(i = 0; i < bsdar->argc; i++) { 311183218Skaiw av = &bsdar->argv[i]; 312183218Skaiw if (*av == NULL) 313183218Skaiw continue; 314183218Skaiw if ((bname = basename(*av)) == NULL) 315183218Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 316183218Skaiw "basename failed"); 317183218Skaiw if (strcmp(bname, name) != 0) 318183218Skaiw continue; 319183218Skaiw 320183218Skaiw *av = NULL; 321183218Skaiw find = 1; 322183218Skaiw break; 323183218Skaiw } 324183218Skaiw if (!find) 325183218Skaiw continue; 326183218Skaiw } 327183218Skaiw 328176434Skaiw size = archive_entry_size(entry); 329176434Skaiw 330176728Skaiw if (size > 0) { 331176728Skaiw if ((buff = malloc(size)) == NULL) 332176728Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 333176728Skaiw "malloc failed"); 334176728Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 335176728Skaiw bsdar_warnc(bsdar, 0, "%s", 336176728Skaiw archive_error_string(a)); 337176728Skaiw free(buff); 338176728Skaiw continue; 339176728Skaiw } 340176728Skaiw } else 341176728Skaiw buff = NULL; 342176728Skaiw 343176434Skaiw obj = malloc(sizeof(struct ar_obj)); 344176434Skaiw if (obj == NULL) 345176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 346176434Skaiw obj->maddr = buff; 347176434Skaiw if ((obj->name = strdup(name)) == NULL) 348176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 349176434Skaiw obj->size = size; 350176434Skaiw obj->uid = archive_entry_uid(entry); 351176434Skaiw obj->gid = archive_entry_gid(entry); 352176434Skaiw obj->md = archive_entry_mode(entry); 353176434Skaiw obj->mtime = archive_entry_mtime(entry); 354176434Skaiw obj->dev = 0; 355176434Skaiw obj->ino = 0; 356176434Skaiw 357176434Skaiw /* 358176434Skaiw * Objects from archive have obj->fd set to -1, 359176434Skaiw * for the ease of cleaning up. 360176434Skaiw */ 361176434Skaiw obj->fd = -1; 362176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 363176434Skaiw } 364176434Skaiw AC(archive_read_close(a)); 365248612Smm AC(archive_read_free(a)); 366183218Skaiw} 367176434Skaiw 368183218Skaiw/* 369183218Skaiw * Determine the constitution of resulting archive. 370183218Skaiw */ 371183218Skaiwstatic void 372183218Skaiwwrite_archive(struct bsdar *bsdar, char mode) 373183218Skaiw{ 374183218Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 375183218Skaiw struct stat sb; 376183218Skaiw const char *bname; 377183218Skaiw char **av; 378183218Skaiw int i; 379183218Skaiw 380183218Skaiw TAILQ_INIT(&bsdar->v_obj); 381183218Skaiw nobj = NULL; 382183218Skaiw pos = NULL; 383183218Skaiw memset(&sb, 0, sizeof(sb)); 384183218Skaiw 385176434Skaiw /* 386183218Skaiw * Test if the specified archive exists, to figure out 387183218Skaiw * whether we are creating one here. 388183218Skaiw */ 389183218Skaiw if (stat(bsdar->filename, &sb) != 0) { 390183218Skaiw if (errno != ENOENT) { 391183218Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 392183218Skaiw bsdar->filename); 393183218Skaiw return; 394183218Skaiw } 395183218Skaiw 396183218Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 397183218Skaiw if (mode != 'r' && mode != 'q') { 398183218Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 399183218Skaiw bsdar->filename); 400183218Skaiw return; 401183218Skaiw } 402183218Skaiw 403183218Skaiw /* Issue a warning if -c is not specified when creating. */ 404183218Skaiw if (!(bsdar->options & AR_C)) 405183218Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 406183218Skaiw goto new_archive; 407183218Skaiw } 408183218Skaiw 409183218Skaiw /* 410183218Skaiw * First read members from existing archive. 411183218Skaiw */ 412183218Skaiw read_objs(bsdar, bsdar->filename, 0); 413183218Skaiw 414183218Skaiw /* 415176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 416176434Skaiw */ 417176434Skaiw if (mode == 's') 418176434Skaiw goto write_objs; 419176434Skaiw 420176434Skaiw /* 421177064Skaiw * For mode 'q', we don't need to adjust existing members either. 422177064Skaiw * Also, -a, -b and -i are ignored in this mode. New members are 423177064Skaiw * always inserted at tail. 424177064Skaiw */ 425177064Skaiw if (mode == 'q') 426177064Skaiw goto new_archive; 427177064Skaiw 428177064Skaiw /* 429183218Skaiw * Mode 'A' adds the contents of another archive to the tail of 430183218Skaiw * current archive. Note that mode 'A' is a special mode for the 431183218Skaiw * ADDLIB command of the ar script mode. Currently there is no 432183218Skaiw * access to this function from the ar command line mode. 433183218Skaiw */ 434183218Skaiw if (mode == 'A') { 435183218Skaiw /* 436183218Skaiw * Read objects from the target archive of ADDLIB command. 437222122Sbcr * If there are members specified in argv, read those members 438183218Skaiw * only, otherwise the entire archive will be read. 439183218Skaiw */ 440183218Skaiw read_objs(bsdar, bsdar->addlib, 1); 441183218Skaiw goto write_objs; 442183218Skaiw } 443183218Skaiw 444183218Skaiw /* 445176434Skaiw * Try to find the position member specified by user. 446176434Skaiw */ 447176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 448176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 449176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 450176434Skaiw pos = obj; 451176434Skaiw break; 452176434Skaiw } 453176434Skaiw } 454176434Skaiw 455176434Skaiw /* 456176434Skaiw * If can't find `pos' specified by user, 457222122Sbcr * silently insert objects at tail. 458176434Skaiw */ 459176434Skaiw if (pos == NULL) 460176434Skaiw bsdar->options &= ~(AR_A | AR_B); 461176434Skaiw } 462176434Skaiw 463176434Skaiw for (i = 0; i < bsdar->argc; i++) { 464176434Skaiw av = &bsdar->argv[i]; 465176434Skaiw 466176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 467176434Skaiw if ((bname = basename(*av)) == NULL) 468176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 469176434Skaiw "basename failed"); 470176434Skaiw if (bsdar->options & AR_TR) { 471176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 472176434Skaiw continue; 473176434Skaiw } else 474176434Skaiw if (strcmp(bname, obj->name) != 0) 475176434Skaiw continue; 476176434Skaiw 477176434Skaiw if (mode == 'r') { 478176434Skaiw /* 479176434Skaiw * if the new member is not qualified 480176434Skaiw * to replace the old one, skip it. 481176434Skaiw */ 482176434Skaiw nobj = create_obj_from_file(bsdar, *av, 483176434Skaiw obj->mtime); 484176434Skaiw if (nobj == NULL) 485176434Skaiw goto skip_obj; 486176434Skaiw } 487176434Skaiw 488176434Skaiw if (bsdar->options & AR_V) 489176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 490176434Skaiw *av); 491176434Skaiw 492176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 493224650Semaste if (mode == 'd' || mode == 'r') 494224650Semaste free_obj(bsdar, obj); 495176434Skaiw 496176434Skaiw if (mode == 'm') 497176434Skaiw insert_obj(bsdar, obj, pos); 498176434Skaiw if (mode == 'r') 499176434Skaiw insert_obj(bsdar, nobj, pos); 500176434Skaiw 501176434Skaiw skip_obj: 502176434Skaiw *av = NULL; 503176434Skaiw break; 504176434Skaiw } 505176434Skaiw 506176434Skaiw } 507176434Skaiw 508176434Skaiwnew_archive: 509176434Skaiw /* 510176434Skaiw * When operating in mode 'r', directly add those user specified 511177064Skaiw * objects which do not exist in current archive. When operating 512177064Skaiw * in mode 'q', all objects specified in command line args are 513177064Skaiw * appended to the archive, without comparing with existing ones. 514176434Skaiw */ 515176434Skaiw for (i = 0; i < bsdar->argc; i++) { 516176434Skaiw av = &bsdar->argv[i]; 517177064Skaiw if (*av != NULL && (mode == 'r' || mode == 'q')) { 518176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 519176434Skaiw if (nobj != NULL) 520176434Skaiw insert_obj(bsdar, nobj, pos); 521176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 522176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 523176434Skaiw *av = NULL; 524176434Skaiw } 525176434Skaiw } 526176434Skaiw 527176434Skaiwwrite_objs: 528176434Skaiw write_objs(bsdar); 529176434Skaiw write_cleanup(bsdar); 530176434Skaiw} 531176434Skaiw 532176434Skaiw/* 533176434Skaiw * Memory cleaning up. 534176434Skaiw */ 535176434Skaiwstatic void 536176434Skaiwwrite_cleanup(struct bsdar *bsdar) 537176434Skaiw{ 538176434Skaiw struct ar_obj *obj, *obj_temp; 539176434Skaiw 540176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 541176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 542224650Semaste free_obj(bsdar, obj); 543176434Skaiw } 544176434Skaiw 545176434Skaiw free(bsdar->as); 546176434Skaiw free(bsdar->s_so); 547176434Skaiw free(bsdar->s_sn); 548176434Skaiw bsdar->as = NULL; 549176434Skaiw bsdar->s_so = NULL; 550176434Skaiw bsdar->s_sn = NULL; 551176434Skaiw} 552176434Skaiw 553176434Skaiw/* 554176434Skaiw * Wrapper for archive_write_data(). 555176434Skaiw */ 556176434Skaiwstatic void 557176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 558176434Skaiw{ 559176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 560176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 561176434Skaiw archive_error_string(a)); 562176434Skaiw} 563176434Skaiw 564176434Skaiw/* 565176434Skaiw * Write the resulting archive members. 566176434Skaiw */ 567176434Skaiwstatic void 568176434Skaiwwrite_objs(struct bsdar *bsdar) 569176434Skaiw{ 570176434Skaiw struct ar_obj *obj; 571176434Skaiw struct archive *a; 572176434Skaiw struct archive_entry *entry; 573176434Skaiw size_t s_sz; /* size of archive symbol table. */ 574176434Skaiw size_t pm_sz; /* size of pseudo members */ 575176434Skaiw int i, nr; 576176434Skaiw 577176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 578176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 579176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 580176434Skaiw 581176434Skaiw bsdar->rela_off = 0; 582176434Skaiw 583176434Skaiw /* Create archive symbol table and archive string table, if need. */ 584176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 585176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 586176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 587176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 588176434Skaiw add_to_ar_str_table(bsdar, obj->name); 589176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 590176434Skaiw } 591176434Skaiw 592176434Skaiw /* 593176434Skaiw * Pad the symbol name string table. It is treated specially because 594176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 595176434Skaiw * for other members. The size of sn table includes the pad bit. 596176434Skaiw */ 597176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 598176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 599176434Skaiw 600176434Skaiw /* 601176434Skaiw * Archive string table is padded by a "\n" as the normal members. 602176728Skaiw * The difference is that the size of archive string table counts 603176434Skaiw * in the pad bit, while normal members' size fileds do not. 604176434Skaiw */ 605176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 606176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 607176434Skaiw 608176434Skaiw /* 609176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 610176728Skaiw * convert previously stored relative offsets to absolute ones, and 611176434Skaiw * then make them Big Endian. 612176434Skaiw * 613176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 614176434Skaiw */ 615176434Skaiw 616176434Skaiw if (bsdar->s_cnt != 0) { 617176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 618176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 619176434Skaiw if (bsdar->as != NULL) 620176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 621176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 622176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 623176434Skaiw pm_sz); 624176434Skaiw } 625176434Skaiw 626176434Skaiw if ((a = archive_write_new()) == NULL) 627176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 628176434Skaiw 629176434Skaiw archive_write_set_format_ar_svr4(a); 630176434Skaiw 631176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 632176434Skaiw 633176434Skaiw /* 634176434Skaiw * write the archive symbol table, if there is one. 635176434Skaiw * If options -s is explicitly specified or we are invoked 636176434Skaiw * as ranlib, write the symbol table even if it is empty. 637176434Skaiw */ 638176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 639176434Skaiw bsdar->options & AR_S) { 640176434Skaiw entry = archive_entry_new(); 641176434Skaiw archive_entry_copy_pathname(entry, "/"); 642213643Skientzle if ((bsdar->options & AR_D) == 0) 643213643Skientzle archive_entry_set_mtime(entry, time(NULL), 0); 644176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 645176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 646176434Skaiw AC(archive_write_header(a, entry)); 647176434Skaiw nr = htobe32(bsdar->s_cnt); 648176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 649176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 650176434Skaiw bsdar->s_cnt); 651176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 652176434Skaiw archive_entry_free(entry); 653176434Skaiw } 654176434Skaiw 655176434Skaiw /* write the archive string table, if any. */ 656176434Skaiw if (bsdar->as != NULL) { 657176434Skaiw entry = archive_entry_new(); 658176434Skaiw archive_entry_copy_pathname(entry, "//"); 659176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 660176434Skaiw AC(archive_write_header(a, entry)); 661176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 662176434Skaiw archive_entry_free(entry); 663176434Skaiw } 664176434Skaiw 665176434Skaiw /* write normal members. */ 666176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 667176434Skaiw entry = archive_entry_new(); 668176434Skaiw archive_entry_copy_pathname(entry, obj->name); 669176434Skaiw archive_entry_set_uid(entry, obj->uid); 670176434Skaiw archive_entry_set_gid(entry, obj->gid); 671176434Skaiw archive_entry_set_mode(entry, obj->md); 672176434Skaiw archive_entry_set_size(entry, obj->size); 673176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 674176434Skaiw archive_entry_set_dev(entry, obj->dev); 675176434Skaiw archive_entry_set_ino(entry, obj->ino); 676176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 677176434Skaiw AC(archive_write_header(a, entry)); 678176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 679176434Skaiw archive_entry_free(entry); 680176434Skaiw } 681176434Skaiw 682176434Skaiw AC(archive_write_close(a)); 683248612Smm AC(archive_write_free(a)); 684176434Skaiw} 685176434Skaiw 686176434Skaiw/* 687176434Skaiw * Extract global symbols from ELF binary members. 688176434Skaiw */ 689176434Skaiwstatic void 690176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 691176434Skaiw{ 692176434Skaiw Elf *e; 693176434Skaiw Elf_Scn *scn; 694176434Skaiw GElf_Shdr shdr; 695176434Skaiw GElf_Sym sym; 696176434Skaiw Elf_Data *data; 697176434Skaiw char *name; 698176434Skaiw size_t n, shstrndx; 699176434Skaiw int elferr, tabndx, len, i; 700176434Skaiw 701176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 702176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 703176434Skaiw elf_errmsg(-1)); 704176434Skaiw return; 705176434Skaiw } 706176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 707222122Sbcr /* Silently ignore non-elf member. */ 708176434Skaiw elf_end(e); 709176434Skaiw return; 710176434Skaiw } 711176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 712176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 713176434Skaiw elf_errmsg(-1)); 714176434Skaiw elf_end(e); 715176434Skaiw return; 716176434Skaiw } 717176434Skaiw 718176434Skaiw tabndx = -1; 719176434Skaiw scn = NULL; 720176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 721176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 722176434Skaiw bsdar_warnc(bsdar, 0, 723176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 724176434Skaiw continue; 725176434Skaiw } 726176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 727176434Skaiw bsdar_warnc(bsdar, 0, 728176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 729176434Skaiw continue; 730176434Skaiw } 731176434Skaiw if (strcmp(name, ".strtab") == 0) { 732176434Skaiw tabndx = elf_ndxscn(scn); 733176434Skaiw break; 734176434Skaiw } 735176434Skaiw } 736176434Skaiw elferr = elf_errno(); 737176434Skaiw if (elferr != 0) 738176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 739176434Skaiw elf_errmsg(elferr)); 740176434Skaiw if (tabndx == -1) { 741176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 742176434Skaiw elf_end(e); 743176434Skaiw return; 744176434Skaiw } 745176434Skaiw 746176434Skaiw scn = NULL; 747176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 748176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 749176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 750176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 751176434Skaiw continue; 752176434Skaiw } 753176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 754176434Skaiw continue; 755176434Skaiw 756176434Skaiw data = NULL; 757176434Skaiw n = 0; 758176434Skaiw while (n < shdr.sh_size && 759176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 760176434Skaiw len = data->d_size / shdr.sh_entsize; 761176434Skaiw for (i = 0; i < len; i++) { 762176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 763176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 764176434Skaiw "gelf_getsym failed: %s", 765176434Skaiw elf_errmsg(-1)); 766176434Skaiw continue; 767176434Skaiw } 768176434Skaiw 769176434Skaiw /* keep only global or weak symbols */ 770176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 771176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 772176434Skaiw continue; 773176434Skaiw 774176434Skaiw /* keep only defined symbols */ 775176434Skaiw if (sym.st_shndx == SHN_UNDEF) 776176434Skaiw continue; 777176434Skaiw 778176434Skaiw if ((name = elf_strptr(e, tabndx, 779176434Skaiw sym.st_name)) == NULL) { 780176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 781176434Skaiw "elf_strptr failed: %s", 782176434Skaiw elf_errmsg(-1)); 783176434Skaiw continue; 784176434Skaiw } 785176434Skaiw 786176434Skaiw add_to_ar_sym_table(bsdar, name); 787176434Skaiw } 788176434Skaiw } 789176434Skaiw } 790176434Skaiw elferr = elf_errno(); 791176434Skaiw if (elferr != 0) 792176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 793176434Skaiw elf_errmsg(elferr)); 794176434Skaiw 795176434Skaiw elf_end(e); 796176434Skaiw} 797176434Skaiw 798176434Skaiw/* 799176434Skaiw * Append to the archive string table buffer. 800176434Skaiw */ 801176434Skaiwstatic void 802176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 803176434Skaiw{ 804176434Skaiw 805176434Skaiw if (bsdar->as == NULL) { 806176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 807176434Skaiw bsdar->as_sz = 0; 808176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 809176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 810176434Skaiw } 811176434Skaiw 812176434Skaiw /* 813176434Skaiw * The space required for holding one member name in as table includes: 814176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 815176434Skaiw */ 816176728Skaiw while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 817176434Skaiw bsdar->as_cap *= 2; 818176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 819176434Skaiw if (bsdar->as == NULL) 820176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 821176434Skaiw } 822176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 823176434Skaiw bsdar->as_sz += strlen(name); 824176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 825176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 826176434Skaiw} 827176434Skaiw 828176434Skaiw/* 829176434Skaiw * Append to the archive symbol table buffer. 830176434Skaiw */ 831176434Skaiwstatic void 832176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 833176434Skaiw{ 834176434Skaiw 835176434Skaiw if (bsdar->s_so == NULL) { 836176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 837176434Skaiw NULL) 838176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 839176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 840176434Skaiw bsdar->s_cnt = 0; 841176434Skaiw } 842176434Skaiw 843176434Skaiw if (bsdar->s_sn == NULL) { 844176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 845176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 846176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 847176434Skaiw bsdar->s_sn_sz = 0; 848176434Skaiw } 849176434Skaiw 850176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 851176434Skaiw bsdar->s_so_cap *= 2; 852176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 853176434Skaiw if (bsdar->s_so == NULL) 854176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 855176434Skaiw } 856176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 857176434Skaiw bsdar->s_cnt++; 858176434Skaiw 859176434Skaiw /* 860176434Skaiw * The space required for holding one symbol name in sn table includes: 861176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 862176434Skaiw */ 863176728Skaiw while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 864176434Skaiw bsdar->s_sn_cap *= 2; 865176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 866176434Skaiw if (bsdar->s_sn == NULL) 867176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 868176434Skaiw } 869176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 870176434Skaiw bsdar->s_sn_sz += strlen(name); 871176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 872176434Skaiw} 873