write.c revision 208189
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 208189 2010-05-17 09:37:59Z 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"); 250208189Skaiw archive_read_support_compression_none(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 name = archive_entry_pathname(entry); 268176434Skaiw 269176434Skaiw /* 270176434Skaiw * skip pseudo members. 271176434Skaiw */ 272176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 273176434Skaiw continue; 274176434Skaiw 275183218Skaiw /* 276183218Skaiw * If checkargv is set, only read those members specified 277183218Skaiw * in argv. 278183218Skaiw */ 279183218Skaiw if (checkargv && bsdar->argc > 0) { 280183218Skaiw find = 0; 281183218Skaiw for(i = 0; i < bsdar->argc; i++) { 282183218Skaiw av = &bsdar->argv[i]; 283183218Skaiw if (*av == NULL) 284183218Skaiw continue; 285183218Skaiw if ((bname = basename(*av)) == NULL) 286183218Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 287183218Skaiw "basename failed"); 288183218Skaiw if (strcmp(bname, name) != 0) 289183218Skaiw continue; 290183218Skaiw 291183218Skaiw *av = NULL; 292183218Skaiw find = 1; 293183218Skaiw break; 294183218Skaiw } 295183218Skaiw if (!find) 296183218Skaiw continue; 297183218Skaiw } 298183218Skaiw 299176434Skaiw size = archive_entry_size(entry); 300176434Skaiw 301176728Skaiw if (size > 0) { 302176728Skaiw if ((buff = malloc(size)) == NULL) 303176728Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 304176728Skaiw "malloc failed"); 305176728Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 306176728Skaiw bsdar_warnc(bsdar, 0, "%s", 307176728Skaiw archive_error_string(a)); 308176728Skaiw free(buff); 309176728Skaiw continue; 310176728Skaiw } 311176728Skaiw } else 312176728Skaiw buff = NULL; 313176728Skaiw 314176434Skaiw obj = malloc(sizeof(struct ar_obj)); 315176434Skaiw if (obj == NULL) 316176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 317176434Skaiw obj->maddr = buff; 318176434Skaiw if ((obj->name = strdup(name)) == NULL) 319176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 320176434Skaiw obj->size = size; 321176434Skaiw obj->uid = archive_entry_uid(entry); 322176434Skaiw obj->gid = archive_entry_gid(entry); 323176434Skaiw obj->md = archive_entry_mode(entry); 324176434Skaiw obj->mtime = archive_entry_mtime(entry); 325176434Skaiw obj->dev = 0; 326176434Skaiw obj->ino = 0; 327176434Skaiw 328176434Skaiw /* 329176434Skaiw * Objects from archive have obj->fd set to -1, 330176434Skaiw * for the ease of cleaning up. 331176434Skaiw */ 332176434Skaiw obj->fd = -1; 333176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 334176434Skaiw } 335176434Skaiw AC(archive_read_close(a)); 336176434Skaiw AC(archive_read_finish(a)); 337183218Skaiw} 338176434Skaiw 339183218Skaiw/* 340183218Skaiw * Determine the constitution of resulting archive. 341183218Skaiw */ 342183218Skaiwstatic void 343183218Skaiwwrite_archive(struct bsdar *bsdar, char mode) 344183218Skaiw{ 345183218Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 346183218Skaiw struct stat sb; 347183218Skaiw const char *bname; 348183218Skaiw char **av; 349183218Skaiw int i; 350183218Skaiw 351183218Skaiw TAILQ_INIT(&bsdar->v_obj); 352183218Skaiw nobj = NULL; 353183218Skaiw pos = NULL; 354183218Skaiw memset(&sb, 0, sizeof(sb)); 355183218Skaiw 356176434Skaiw /* 357183218Skaiw * Test if the specified archive exists, to figure out 358183218Skaiw * whether we are creating one here. 359183218Skaiw */ 360183218Skaiw if (stat(bsdar->filename, &sb) != 0) { 361183218Skaiw if (errno != ENOENT) { 362183218Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 363183218Skaiw bsdar->filename); 364183218Skaiw return; 365183218Skaiw } 366183218Skaiw 367183218Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 368183218Skaiw if (mode != 'r' && mode != 'q') { 369183218Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 370183218Skaiw bsdar->filename); 371183218Skaiw return; 372183218Skaiw } 373183218Skaiw 374183218Skaiw /* Issue a warning if -c is not specified when creating. */ 375183218Skaiw if (!(bsdar->options & AR_C)) 376183218Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 377183218Skaiw goto new_archive; 378183218Skaiw } 379183218Skaiw 380183218Skaiw /* 381183218Skaiw * First read members from existing archive. 382183218Skaiw */ 383183218Skaiw read_objs(bsdar, bsdar->filename, 0); 384183218Skaiw 385183218Skaiw /* 386176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 387176434Skaiw */ 388176434Skaiw if (mode == 's') 389176434Skaiw goto write_objs; 390176434Skaiw 391176434Skaiw /* 392177064Skaiw * For mode 'q', we don't need to adjust existing members either. 393177064Skaiw * Also, -a, -b and -i are ignored in this mode. New members are 394177064Skaiw * always inserted at tail. 395177064Skaiw */ 396177064Skaiw if (mode == 'q') 397177064Skaiw goto new_archive; 398177064Skaiw 399177064Skaiw /* 400183218Skaiw * Mode 'A' adds the contents of another archive to the tail of 401183218Skaiw * current archive. Note that mode 'A' is a special mode for the 402183218Skaiw * ADDLIB command of the ar script mode. Currently there is no 403183218Skaiw * access to this function from the ar command line mode. 404183218Skaiw */ 405183218Skaiw if (mode == 'A') { 406183218Skaiw /* 407183218Skaiw * Read objects from the target archive of ADDLIB command. 408183218Skaiw * If there are members spcified in argv, read those members 409183218Skaiw * only, otherwise the entire archive will be read. 410183218Skaiw */ 411183218Skaiw read_objs(bsdar, bsdar->addlib, 1); 412183218Skaiw goto write_objs; 413183218Skaiw } 414183218Skaiw 415183218Skaiw /* 416176434Skaiw * Try to find the position member specified by user. 417176434Skaiw */ 418176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 419176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 420176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 421176434Skaiw pos = obj; 422176434Skaiw break; 423176434Skaiw } 424176434Skaiw } 425176434Skaiw 426176434Skaiw /* 427176434Skaiw * If can't find `pos' specified by user, 428176434Skaiw * sliently insert objects at tail. 429176434Skaiw */ 430176434Skaiw if (pos == NULL) 431176434Skaiw bsdar->options &= ~(AR_A | AR_B); 432176434Skaiw } 433176434Skaiw 434176434Skaiw for (i = 0; i < bsdar->argc; i++) { 435176434Skaiw av = &bsdar->argv[i]; 436176434Skaiw 437176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 438176434Skaiw if ((bname = basename(*av)) == NULL) 439176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 440176434Skaiw "basename failed"); 441176434Skaiw if (bsdar->options & AR_TR) { 442176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 443176434Skaiw continue; 444176434Skaiw } else 445176434Skaiw if (strcmp(bname, obj->name) != 0) 446176434Skaiw continue; 447176434Skaiw 448176434Skaiw if (mode == 'r') { 449176434Skaiw /* 450176434Skaiw * if the new member is not qualified 451176434Skaiw * to replace the old one, skip it. 452176434Skaiw */ 453176434Skaiw nobj = create_obj_from_file(bsdar, *av, 454176434Skaiw obj->mtime); 455176434Skaiw if (nobj == NULL) 456176434Skaiw goto skip_obj; 457176434Skaiw } 458176434Skaiw 459176434Skaiw if (bsdar->options & AR_V) 460176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 461176434Skaiw *av); 462176434Skaiw 463176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 464176434Skaiw if (mode == 'd' || mode == 'r') { 465176434Skaiw free(obj->maddr); 466176434Skaiw free(obj->name); 467176434Skaiw free(obj); 468176434Skaiw } 469176434Skaiw 470176434Skaiw if (mode == 'm') 471176434Skaiw insert_obj(bsdar, obj, pos); 472176434Skaiw if (mode == 'r') 473176434Skaiw insert_obj(bsdar, nobj, pos); 474176434Skaiw 475176434Skaiw skip_obj: 476176434Skaiw *av = NULL; 477176434Skaiw break; 478176434Skaiw } 479176434Skaiw 480176434Skaiw } 481176434Skaiw 482176434Skaiwnew_archive: 483176434Skaiw /* 484176434Skaiw * When operating in mode 'r', directly add those user specified 485177064Skaiw * objects which do not exist in current archive. When operating 486177064Skaiw * in mode 'q', all objects specified in command line args are 487177064Skaiw * appended to the archive, without comparing with existing ones. 488176434Skaiw */ 489176434Skaiw for (i = 0; i < bsdar->argc; i++) { 490176434Skaiw av = &bsdar->argv[i]; 491177064Skaiw if (*av != NULL && (mode == 'r' || mode == 'q')) { 492176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 493176434Skaiw if (nobj != NULL) 494176434Skaiw insert_obj(bsdar, nobj, pos); 495176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 496176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 497176434Skaiw *av = NULL; 498176434Skaiw } 499176434Skaiw } 500176434Skaiw 501176434Skaiwwrite_objs: 502176434Skaiw write_objs(bsdar); 503176434Skaiw write_cleanup(bsdar); 504176434Skaiw} 505176434Skaiw 506176434Skaiw/* 507176434Skaiw * Memory cleaning up. 508176434Skaiw */ 509176434Skaiwstatic void 510176434Skaiwwrite_cleanup(struct bsdar *bsdar) 511176434Skaiw{ 512176434Skaiw struct ar_obj *obj, *obj_temp; 513176434Skaiw 514176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 515176434Skaiw if (obj->fd == -1) 516176434Skaiw free(obj->maddr); 517176434Skaiw else 518176525Skaiw if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 519176434Skaiw bsdar_warnc(bsdar, errno, 520176434Skaiw "can't munmap file: %s", obj->name); 521176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 522176525Skaiw free(obj->name); 523176434Skaiw free(obj); 524176434Skaiw } 525176434Skaiw 526176434Skaiw free(bsdar->as); 527176434Skaiw free(bsdar->s_so); 528176434Skaiw free(bsdar->s_sn); 529176434Skaiw bsdar->as = NULL; 530176434Skaiw bsdar->s_so = NULL; 531176434Skaiw bsdar->s_sn = NULL; 532176434Skaiw} 533176434Skaiw 534176434Skaiw/* 535176434Skaiw * Wrapper for archive_write_data(). 536176434Skaiw */ 537176434Skaiwstatic void 538176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 539176434Skaiw{ 540176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 541176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 542176434Skaiw archive_error_string(a)); 543176434Skaiw} 544176434Skaiw 545176434Skaiw/* 546176434Skaiw * Write the resulting archive members. 547176434Skaiw */ 548176434Skaiwstatic void 549176434Skaiwwrite_objs(struct bsdar *bsdar) 550176434Skaiw{ 551176434Skaiw struct ar_obj *obj; 552176434Skaiw struct archive *a; 553176434Skaiw struct archive_entry *entry; 554176434Skaiw size_t s_sz; /* size of archive symbol table. */ 555176434Skaiw size_t pm_sz; /* size of pseudo members */ 556176434Skaiw int i, nr; 557176434Skaiw 558176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 559176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 560176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 561176434Skaiw 562176434Skaiw bsdar->rela_off = 0; 563176434Skaiw 564176434Skaiw /* Create archive symbol table and archive string table, if need. */ 565176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 566176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 567176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 568176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 569176434Skaiw add_to_ar_str_table(bsdar, obj->name); 570176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 571176434Skaiw } 572176434Skaiw 573176434Skaiw /* 574176434Skaiw * Pad the symbol name string table. It is treated specially because 575176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 576176434Skaiw * for other members. The size of sn table includes the pad bit. 577176434Skaiw */ 578176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 579176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 580176434Skaiw 581176434Skaiw /* 582176434Skaiw * Archive string table is padded by a "\n" as the normal members. 583176728Skaiw * The difference is that the size of archive string table counts 584176434Skaiw * in the pad bit, while normal members' size fileds do not. 585176434Skaiw */ 586176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 587176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 588176434Skaiw 589176434Skaiw /* 590176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 591176728Skaiw * convert previously stored relative offsets to absolute ones, and 592176434Skaiw * then make them Big Endian. 593176434Skaiw * 594176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 595176434Skaiw */ 596176434Skaiw 597176434Skaiw if (bsdar->s_cnt != 0) { 598176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 599176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 600176434Skaiw if (bsdar->as != NULL) 601176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 602176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 603176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 604176434Skaiw pm_sz); 605176434Skaiw } 606176434Skaiw 607176434Skaiw if ((a = archive_write_new()) == NULL) 608176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 609176434Skaiw 610176434Skaiw archive_write_set_format_ar_svr4(a); 611208189Skaiw archive_write_set_compression_none(a); 612176434Skaiw 613176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 614176434Skaiw 615176434Skaiw /* 616176434Skaiw * write the archive symbol table, if there is one. 617176434Skaiw * If options -s is explicitly specified or we are invoked 618176434Skaiw * as ranlib, write the symbol table even if it is empty. 619176434Skaiw */ 620176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 621176434Skaiw bsdar->options & AR_S) { 622176434Skaiw entry = archive_entry_new(); 623176434Skaiw archive_entry_copy_pathname(entry, "/"); 624176434Skaiw archive_entry_set_mtime(entry, time(NULL), 0); 625176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 626176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 627176434Skaiw AC(archive_write_header(a, entry)); 628176434Skaiw nr = htobe32(bsdar->s_cnt); 629176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 630176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 631176434Skaiw bsdar->s_cnt); 632176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 633176434Skaiw archive_entry_free(entry); 634176434Skaiw } 635176434Skaiw 636176434Skaiw /* write the archive string table, if any. */ 637176434Skaiw if (bsdar->as != NULL) { 638176434Skaiw entry = archive_entry_new(); 639176434Skaiw archive_entry_copy_pathname(entry, "//"); 640176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 641176434Skaiw AC(archive_write_header(a, entry)); 642176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 643176434Skaiw archive_entry_free(entry); 644176434Skaiw } 645176434Skaiw 646176434Skaiw /* write normal members. */ 647176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 648176434Skaiw entry = archive_entry_new(); 649176434Skaiw archive_entry_copy_pathname(entry, obj->name); 650176434Skaiw archive_entry_set_uid(entry, obj->uid); 651176434Skaiw archive_entry_set_gid(entry, obj->gid); 652176434Skaiw archive_entry_set_mode(entry, obj->md); 653176434Skaiw archive_entry_set_size(entry, obj->size); 654176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 655176434Skaiw archive_entry_set_dev(entry, obj->dev); 656176434Skaiw archive_entry_set_ino(entry, obj->ino); 657176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 658176434Skaiw AC(archive_write_header(a, entry)); 659176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 660176434Skaiw archive_entry_free(entry); 661176434Skaiw } 662176434Skaiw 663176434Skaiw AC(archive_write_close(a)); 664176434Skaiw AC(archive_write_finish(a)); 665176434Skaiw} 666176434Skaiw 667176434Skaiw/* 668176434Skaiw * Extract global symbols from ELF binary members. 669176434Skaiw */ 670176434Skaiwstatic void 671176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 672176434Skaiw{ 673176434Skaiw Elf *e; 674176434Skaiw Elf_Scn *scn; 675176434Skaiw GElf_Shdr shdr; 676176434Skaiw GElf_Sym sym; 677176434Skaiw Elf_Data *data; 678176434Skaiw char *name; 679176434Skaiw size_t n, shstrndx; 680176434Skaiw int elferr, tabndx, len, i; 681176434Skaiw 682176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 683176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 684176434Skaiw elf_errmsg(-1)); 685176434Skaiw return; 686176434Skaiw } 687176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 688176434Skaiw /* Sliently ignore non-elf member. */ 689176434Skaiw elf_end(e); 690176434Skaiw return; 691176434Skaiw } 692176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 693176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 694176434Skaiw elf_errmsg(-1)); 695176434Skaiw elf_end(e); 696176434Skaiw return; 697176434Skaiw } 698176434Skaiw 699176434Skaiw tabndx = -1; 700176434Skaiw scn = NULL; 701176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 702176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 703176434Skaiw bsdar_warnc(bsdar, 0, 704176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 705176434Skaiw continue; 706176434Skaiw } 707176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 708176434Skaiw bsdar_warnc(bsdar, 0, 709176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 710176434Skaiw continue; 711176434Skaiw } 712176434Skaiw if (strcmp(name, ".strtab") == 0) { 713176434Skaiw tabndx = elf_ndxscn(scn); 714176434Skaiw break; 715176434Skaiw } 716176434Skaiw } 717176434Skaiw elferr = elf_errno(); 718176434Skaiw if (elferr != 0) 719176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 720176434Skaiw elf_errmsg(elferr)); 721176434Skaiw if (tabndx == -1) { 722176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 723176434Skaiw elf_end(e); 724176434Skaiw return; 725176434Skaiw } 726176434Skaiw 727176434Skaiw scn = NULL; 728176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 729176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 730176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 731176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 732176434Skaiw continue; 733176434Skaiw } 734176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 735176434Skaiw continue; 736176434Skaiw 737176434Skaiw data = NULL; 738176434Skaiw n = 0; 739176434Skaiw while (n < shdr.sh_size && 740176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 741176434Skaiw len = data->d_size / shdr.sh_entsize; 742176434Skaiw for (i = 0; i < len; i++) { 743176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 744176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 745176434Skaiw "gelf_getsym failed: %s", 746176434Skaiw elf_errmsg(-1)); 747176434Skaiw continue; 748176434Skaiw } 749176434Skaiw 750176434Skaiw /* keep only global or weak symbols */ 751176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 752176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 753176434Skaiw continue; 754176434Skaiw 755176434Skaiw /* keep only defined symbols */ 756176434Skaiw if (sym.st_shndx == SHN_UNDEF) 757176434Skaiw continue; 758176434Skaiw 759176434Skaiw if ((name = elf_strptr(e, tabndx, 760176434Skaiw sym.st_name)) == NULL) { 761176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 762176434Skaiw "elf_strptr failed: %s", 763176434Skaiw elf_errmsg(-1)); 764176434Skaiw continue; 765176434Skaiw } 766176434Skaiw 767176434Skaiw add_to_ar_sym_table(bsdar, name); 768176434Skaiw } 769176434Skaiw } 770176434Skaiw } 771176434Skaiw elferr = elf_errno(); 772176434Skaiw if (elferr != 0) 773176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 774176434Skaiw elf_errmsg(elferr)); 775176434Skaiw 776176434Skaiw elf_end(e); 777176434Skaiw} 778176434Skaiw 779176434Skaiw/* 780176434Skaiw * Append to the archive string table buffer. 781176434Skaiw */ 782176434Skaiwstatic void 783176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 784176434Skaiw{ 785176434Skaiw 786176434Skaiw if (bsdar->as == NULL) { 787176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 788176434Skaiw bsdar->as_sz = 0; 789176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 790176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 791176434Skaiw } 792176434Skaiw 793176434Skaiw /* 794176434Skaiw * The space required for holding one member name in as table includes: 795176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 796176434Skaiw */ 797176728Skaiw while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 798176434Skaiw bsdar->as_cap *= 2; 799176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 800176434Skaiw if (bsdar->as == NULL) 801176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 802176434Skaiw } 803176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 804176434Skaiw bsdar->as_sz += strlen(name); 805176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 806176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 807176434Skaiw} 808176434Skaiw 809176434Skaiw/* 810176434Skaiw * Append to the archive symbol table buffer. 811176434Skaiw */ 812176434Skaiwstatic void 813176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 814176434Skaiw{ 815176434Skaiw 816176434Skaiw if (bsdar->s_so == NULL) { 817176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 818176434Skaiw NULL) 819176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 820176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 821176434Skaiw bsdar->s_cnt = 0; 822176434Skaiw } 823176434Skaiw 824176434Skaiw if (bsdar->s_sn == NULL) { 825176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 826176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 827176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 828176434Skaiw bsdar->s_sn_sz = 0; 829176434Skaiw } 830176434Skaiw 831176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 832176434Skaiw bsdar->s_so_cap *= 2; 833176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 834176434Skaiw if (bsdar->s_so == NULL) 835176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 836176434Skaiw } 837176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 838176434Skaiw bsdar->s_cnt++; 839176434Skaiw 840176434Skaiw /* 841176434Skaiw * The space required for holding one symbol name in sn table includes: 842176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 843176434Skaiw */ 844176728Skaiw while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 845176434Skaiw bsdar->s_sn_cap *= 2; 846176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 847176434Skaiw if (bsdar->s_sn == NULL) 848176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 849176434Skaiw } 850176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 851176434Skaiw bsdar->s_sn_sz += strlen(name); 852176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 853176434Skaiw} 854