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: releng/10.2/usr.bin/ar/write.c 285224 2015-07-07 02:17:24Z emaste $"); 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> 44285224Semaste#include <unistd.h> 45176434Skaiw 46176434Skaiw#include "ar.h" 47176434Skaiw 48176434Skaiw#define _ARMAG_LEN 8 /* length of ar magic string */ 49176434Skaiw#define _ARHDR_LEN 60 /* length of ar header */ 50176434Skaiw#define _INIT_AS_CAP 128 /* initial archive string table size */ 51176434Skaiw#define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */ 52176434Skaiw#define _INIT_SYMNAME_CAP 1024 /* initial sn table size */ 53176434Skaiw#define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */ 54176434Skaiw#define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */ 55176434Skaiw 56176434Skaiwstatic void add_to_ar_str_table(struct bsdar *bsdar, const char *name); 57176434Skaiwstatic void add_to_ar_sym_table(struct bsdar *bsdar, const char *name); 58176434Skaiwstatic struct ar_obj *create_obj_from_file(struct bsdar *bsdar, 59176434Skaiw const char *name, time_t mtime); 60176434Skaiwstatic void create_symtab_entry(struct bsdar *bsdar, void *maddr, 61176434Skaiw size_t size); 62224650Semastestatic void free_obj(struct bsdar *bsdar, struct ar_obj *obj); 63176434Skaiwstatic void insert_obj(struct bsdar *bsdar, struct ar_obj *obj, 64176434Skaiw struct ar_obj *pos); 65285224Semastestatic void prefault_buffer(const char *buf, size_t s); 66183218Skaiwstatic void read_objs(struct bsdar *bsdar, const char *archive, 67183218Skaiw int checkargv); 68176434Skaiwstatic void write_archive(struct bsdar *bsdar, char mode); 69176434Skaiwstatic void write_cleanup(struct bsdar *bsdar); 70176434Skaiwstatic void write_data(struct bsdar *bsdar, struct archive *a, 71176434Skaiw const void *buf, size_t s); 72176434Skaiwstatic void write_objs(struct bsdar *bsdar); 73176434Skaiw 74176434Skaiwvoid 75176434Skaiwar_mode_d(struct bsdar *bsdar) 76176434Skaiw{ 77176434Skaiw 78176434Skaiw write_archive(bsdar, 'd'); 79176434Skaiw} 80176434Skaiw 81176434Skaiwvoid 82176434Skaiwar_mode_m(struct bsdar *bsdar) 83176434Skaiw{ 84176434Skaiw 85176434Skaiw write_archive(bsdar, 'm'); 86176434Skaiw} 87176434Skaiw 88176434Skaiwvoid 89177064Skaiwar_mode_q(struct bsdar *bsdar) 90177064Skaiw{ 91177064Skaiw 92177064Skaiw write_archive(bsdar, 'q'); 93177064Skaiw} 94177064Skaiw 95177064Skaiwvoid 96176434Skaiwar_mode_r(struct bsdar *bsdar) 97176434Skaiw{ 98176434Skaiw 99176434Skaiw write_archive(bsdar, 'r'); 100176434Skaiw} 101176434Skaiw 102176434Skaiwvoid 103176434Skaiwar_mode_s(struct bsdar *bsdar) 104176434Skaiw{ 105176434Skaiw 106176434Skaiw write_archive(bsdar, 's'); 107176434Skaiw} 108176434Skaiw 109183218Skaiwvoid 110183218Skaiwar_mode_A(struct bsdar *bsdar) 111183218Skaiw{ 112183218Skaiw 113183218Skaiw write_archive(bsdar, 'A'); 114183218Skaiw} 115183218Skaiw 116176434Skaiw/* 117176434Skaiw * Create object from file, return created obj upon success, or NULL 118176434Skaiw * when an error occurs or the member is not newer than existing 119222122Sbcr * one while -u is specified. 120176434Skaiw */ 121176434Skaiwstatic struct ar_obj * 122176434Skaiwcreate_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime) 123176434Skaiw{ 124176434Skaiw struct ar_obj *obj; 125176434Skaiw struct stat sb; 126176434Skaiw const char *bname; 127176434Skaiw 128176434Skaiw if (name == NULL) 129176528Skaiw return (NULL); 130176434Skaiw 131176434Skaiw obj = malloc(sizeof(struct ar_obj)); 132176434Skaiw if (obj == NULL) 133176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 134176434Skaiw if ((obj->fd = open(name, O_RDONLY, 0)) < 0) { 135176434Skaiw bsdar_warnc(bsdar, errno, "can't open file: %s", name); 136176434Skaiw free(obj); 137176528Skaiw return (NULL); 138176434Skaiw } 139176434Skaiw 140176434Skaiw if ((bname = basename(name)) == NULL) 141176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed"); 142176434Skaiw if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) { 143176434Skaiw if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL) 144176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 145176434Skaiw (void)strncpy(obj->name, bname, _TRUNCATE_LEN); 146176434Skaiw obj->name[_TRUNCATE_LEN] = '\0'; 147176434Skaiw } else 148176434Skaiw if ((obj->name = strdup(bname)) == NULL) 149176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 150176434Skaiw 151176434Skaiw if (fstat(obj->fd, &sb) < 0) { 152176434Skaiw bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name); 153176434Skaiw goto giveup; 154176434Skaiw } 155176434Skaiw if (!S_ISREG(sb.st_mode)) { 156176434Skaiw bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name); 157176434Skaiw goto giveup; 158176434Skaiw } 159176434Skaiw 160176434Skaiw /* 161176434Skaiw * When option '-u' is specified and member is not newer than the 162176434Skaiw * existing one, the replace will not happen. While if mtime == 0, 163176434Skaiw * which indicates that this is to "replace a none exist member", 164176434Skaiw * the replace will proceed regardless of '-u'. 165176434Skaiw */ 166176434Skaiw if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime) 167176434Skaiw goto giveup; 168176434Skaiw 169213643Skientzle /* 170213643Skientzle * When option '-D' is specified, mtime and UID / GID from the file 171213643Skientzle * will be replaced with 0, and file mode with 644. This ensures that 172213643Skientzle * checksums will match for two archives containing the exact same 173213643Skientzle * files. 174213643Skientzle */ 175213643Skientzle if (bsdar->options & AR_D) { 176213643Skientzle obj->uid = 0; 177213643Skientzle obj->gid = 0; 178213643Skientzle obj->mtime = 0; 179213643Skientzle obj->md = S_IFREG | 0644; 180213643Skientzle } else { 181213643Skientzle obj->uid = sb.st_uid; 182213643Skientzle obj->gid = sb.st_gid; 183213643Skientzle obj->mtime = sb.st_mtime; 184213643Skientzle obj->md = sb.st_mode; 185213643Skientzle } 186176434Skaiw obj->size = sb.st_size; 187176434Skaiw obj->dev = sb.st_dev; 188176434Skaiw obj->ino = sb.st_ino; 189176525Skaiw 190176525Skaiw if (obj->size == 0) { 191176525Skaiw obj->maddr = NULL; 192176528Skaiw return (obj); 193176525Skaiw } 194176525Skaiw 195176434Skaiw if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 196176434Skaiw MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 197176434Skaiw bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 198176434Skaiw goto giveup; 199176434Skaiw } 200176434Skaiw if (close(obj->fd) < 0) 201176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 202176434Skaiw obj->name); 203176434Skaiw 204176528Skaiw return (obj); 205176434Skaiw 206176434Skaiwgiveup: 207176434Skaiw if (close(obj->fd) < 0) 208176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 209176434Skaiw obj->name); 210176434Skaiw free(obj->name); 211176434Skaiw free(obj); 212176528Skaiw return (NULL); 213176434Skaiw} 214176434Skaiw 215176434Skaiw/* 216224650Semaste * Free object itself and its associated allocations. 217224650Semaste */ 218224650Semastestatic void 219224650Semastefree_obj(struct bsdar *bsdar, struct ar_obj *obj) 220224650Semaste{ 221224650Semaste if (obj->fd == -1) 222224650Semaste free(obj->maddr); 223224650Semaste else 224224650Semaste if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 225224650Semaste bsdar_warnc(bsdar, errno, 226224650Semaste "can't munmap file: %s", obj->name); 227224650Semaste free(obj->name); 228224650Semaste free(obj); 229224650Semaste} 230224650Semaste 231224650Semaste/* 232176434Skaiw * Insert obj to the tail, or before/after the pos obj. 233176434Skaiw */ 234176434Skaiwstatic void 235176434Skaiwinsert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 236176434Skaiw{ 237176434Skaiw if (obj == NULL) 238176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 239176434Skaiw 240176434Skaiw if (pos == NULL || obj == pos) 241176434Skaiw /* 242222122Sbcr * If the object to move happens to be the position obj, 243176434Skaiw * or if there is not a pos obj, move it to tail. 244176434Skaiw */ 245176434Skaiw goto tail; 246176434Skaiw 247176434Skaiw if (bsdar->options & AR_B) { 248176434Skaiw TAILQ_INSERT_BEFORE(pos, obj, objs); 249176434Skaiw return; 250176434Skaiw } 251176434Skaiw if (bsdar->options & AR_A) { 252176434Skaiw TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 253176434Skaiw return; 254176434Skaiw } 255176434Skaiw 256176434Skaiwtail: 257176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 258176434Skaiw 259176434Skaiw} 260176434Skaiw 261176434Skaiw/* 262183218Skaiw * Read objects from archive into v_obj list. Note that checkargv is 263183218Skaiw * set when read_objs is used to read objects from the target of 264183218Skaiw * ADDLIB command (ar script mode), in this case argv array possibly 265183218Skaiw * specifies the members ADDLIB want. 266176434Skaiw */ 267176434Skaiwstatic void 268183218Skaiwread_objs(struct bsdar *bsdar, const char *archive, int checkargv) 269176434Skaiw{ 270176434Skaiw struct archive *a; 271176434Skaiw struct archive_entry *entry; 272183218Skaiw struct ar_obj *obj; 273176434Skaiw const char *name; 274176434Skaiw const char *bname; 275176434Skaiw char *buff; 276176434Skaiw char **av; 277176434Skaiw size_t size; 278183218Skaiw int i, r, find; 279176434Skaiw 280176434Skaiw if ((a = archive_read_new()) == NULL) 281176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 282176434Skaiw archive_read_support_format_ar(a); 283183218Skaiw AC(archive_read_open_filename(a, archive, DEF_BLKSZ)); 284176434Skaiw for (;;) { 285176434Skaiw r = archive_read_next_header(a, &entry); 286176434Skaiw if (r == ARCHIVE_FATAL) 287176434Skaiw bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 288176434Skaiw archive_error_string(a)); 289176434Skaiw if (r == ARCHIVE_EOF) 290176434Skaiw break; 291176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 292176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 293176434Skaiw if (r == ARCHIVE_RETRY) { 294176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 295176434Skaiw continue; 296176434Skaiw } 297176434Skaiw 298176434Skaiw name = archive_entry_pathname(entry); 299176434Skaiw 300176434Skaiw /* 301176434Skaiw * skip pseudo members. 302176434Skaiw */ 303176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 304176434Skaiw continue; 305176434Skaiw 306183218Skaiw /* 307183218Skaiw * If checkargv is set, only read those members specified 308183218Skaiw * in argv. 309183218Skaiw */ 310183218Skaiw if (checkargv && bsdar->argc > 0) { 311183218Skaiw find = 0; 312183218Skaiw for(i = 0; i < bsdar->argc; i++) { 313183218Skaiw av = &bsdar->argv[i]; 314183218Skaiw if (*av == NULL) 315183218Skaiw continue; 316183218Skaiw if ((bname = basename(*av)) == NULL) 317183218Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 318183218Skaiw "basename failed"); 319183218Skaiw if (strcmp(bname, name) != 0) 320183218Skaiw continue; 321183218Skaiw 322183218Skaiw *av = NULL; 323183218Skaiw find = 1; 324183218Skaiw break; 325183218Skaiw } 326183218Skaiw if (!find) 327183218Skaiw continue; 328183218Skaiw } 329183218Skaiw 330176434Skaiw size = archive_entry_size(entry); 331176434Skaiw 332176728Skaiw if (size > 0) { 333176728Skaiw if ((buff = malloc(size)) == NULL) 334176728Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 335176728Skaiw "malloc failed"); 336176728Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 337176728Skaiw bsdar_warnc(bsdar, 0, "%s", 338176728Skaiw archive_error_string(a)); 339176728Skaiw free(buff); 340176728Skaiw continue; 341176728Skaiw } 342176728Skaiw } else 343176728Skaiw buff = NULL; 344176728Skaiw 345176434Skaiw obj = malloc(sizeof(struct ar_obj)); 346176434Skaiw if (obj == NULL) 347176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 348176434Skaiw obj->maddr = buff; 349176434Skaiw if ((obj->name = strdup(name)) == NULL) 350176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 351176434Skaiw obj->size = size; 352176434Skaiw obj->uid = archive_entry_uid(entry); 353176434Skaiw obj->gid = archive_entry_gid(entry); 354176434Skaiw obj->md = archive_entry_mode(entry); 355176434Skaiw obj->mtime = archive_entry_mtime(entry); 356176434Skaiw obj->dev = 0; 357176434Skaiw obj->ino = 0; 358176434Skaiw 359176434Skaiw /* 360176434Skaiw * Objects from archive have obj->fd set to -1, 361176434Skaiw * for the ease of cleaning up. 362176434Skaiw */ 363176434Skaiw obj->fd = -1; 364176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 365176434Skaiw } 366176434Skaiw AC(archive_read_close(a)); 367248612Smm AC(archive_read_free(a)); 368183218Skaiw} 369176434Skaiw 370183218Skaiw/* 371183218Skaiw * Determine the constitution of resulting archive. 372183218Skaiw */ 373183218Skaiwstatic void 374183218Skaiwwrite_archive(struct bsdar *bsdar, char mode) 375183218Skaiw{ 376183218Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 377183218Skaiw struct stat sb; 378183218Skaiw const char *bname; 379183218Skaiw char **av; 380183218Skaiw int i; 381183218Skaiw 382183218Skaiw TAILQ_INIT(&bsdar->v_obj); 383183218Skaiw nobj = NULL; 384183218Skaiw pos = NULL; 385183218Skaiw memset(&sb, 0, sizeof(sb)); 386183218Skaiw 387176434Skaiw /* 388183218Skaiw * Test if the specified archive exists, to figure out 389183218Skaiw * whether we are creating one here. 390183218Skaiw */ 391183218Skaiw if (stat(bsdar->filename, &sb) != 0) { 392183218Skaiw if (errno != ENOENT) { 393183218Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 394183218Skaiw bsdar->filename); 395183218Skaiw return; 396183218Skaiw } 397183218Skaiw 398183218Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 399183218Skaiw if (mode != 'r' && mode != 'q') { 400183218Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 401183218Skaiw bsdar->filename); 402183218Skaiw return; 403183218Skaiw } 404183218Skaiw 405183218Skaiw /* Issue a warning if -c is not specified when creating. */ 406183218Skaiw if (!(bsdar->options & AR_C)) 407183218Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 408183218Skaiw goto new_archive; 409183218Skaiw } 410183218Skaiw 411183218Skaiw /* 412183218Skaiw * First read members from existing archive. 413183218Skaiw */ 414183218Skaiw read_objs(bsdar, bsdar->filename, 0); 415183218Skaiw 416183218Skaiw /* 417176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 418176434Skaiw */ 419176434Skaiw if (mode == 's') 420176434Skaiw goto write_objs; 421176434Skaiw 422176434Skaiw /* 423177064Skaiw * For mode 'q', we don't need to adjust existing members either. 424177064Skaiw * Also, -a, -b and -i are ignored in this mode. New members are 425177064Skaiw * always inserted at tail. 426177064Skaiw */ 427177064Skaiw if (mode == 'q') 428177064Skaiw goto new_archive; 429177064Skaiw 430177064Skaiw /* 431183218Skaiw * Mode 'A' adds the contents of another archive to the tail of 432183218Skaiw * current archive. Note that mode 'A' is a special mode for the 433183218Skaiw * ADDLIB command of the ar script mode. Currently there is no 434183218Skaiw * access to this function from the ar command line mode. 435183218Skaiw */ 436183218Skaiw if (mode == 'A') { 437183218Skaiw /* 438183218Skaiw * Read objects from the target archive of ADDLIB command. 439222122Sbcr * If there are members specified in argv, read those members 440183218Skaiw * only, otherwise the entire archive will be read. 441183218Skaiw */ 442183218Skaiw read_objs(bsdar, bsdar->addlib, 1); 443183218Skaiw goto write_objs; 444183218Skaiw } 445183218Skaiw 446183218Skaiw /* 447176434Skaiw * Try to find the position member specified by user. 448176434Skaiw */ 449176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 450176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 451176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 452176434Skaiw pos = obj; 453176434Skaiw break; 454176434Skaiw } 455176434Skaiw } 456176434Skaiw 457176434Skaiw /* 458176434Skaiw * If can't find `pos' specified by user, 459222122Sbcr * silently insert objects at tail. 460176434Skaiw */ 461176434Skaiw if (pos == NULL) 462176434Skaiw bsdar->options &= ~(AR_A | AR_B); 463176434Skaiw } 464176434Skaiw 465176434Skaiw for (i = 0; i < bsdar->argc; i++) { 466176434Skaiw av = &bsdar->argv[i]; 467176434Skaiw 468176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 469176434Skaiw if ((bname = basename(*av)) == NULL) 470176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 471176434Skaiw "basename failed"); 472176434Skaiw if (bsdar->options & AR_TR) { 473176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 474176434Skaiw continue; 475176434Skaiw } else 476176434Skaiw if (strcmp(bname, obj->name) != 0) 477176434Skaiw continue; 478176434Skaiw 479176434Skaiw if (mode == 'r') { 480176434Skaiw /* 481176434Skaiw * if the new member is not qualified 482176434Skaiw * to replace the old one, skip it. 483176434Skaiw */ 484176434Skaiw nobj = create_obj_from_file(bsdar, *av, 485176434Skaiw obj->mtime); 486176434Skaiw if (nobj == NULL) 487176434Skaiw goto skip_obj; 488176434Skaiw } 489176434Skaiw 490176434Skaiw if (bsdar->options & AR_V) 491176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 492176434Skaiw *av); 493176434Skaiw 494176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 495224650Semaste if (mode == 'd' || mode == 'r') 496224650Semaste free_obj(bsdar, obj); 497176434Skaiw 498176434Skaiw if (mode == 'm') 499176434Skaiw insert_obj(bsdar, obj, pos); 500176434Skaiw if (mode == 'r') 501176434Skaiw insert_obj(bsdar, nobj, pos); 502176434Skaiw 503176434Skaiw skip_obj: 504176434Skaiw *av = NULL; 505176434Skaiw break; 506176434Skaiw } 507176434Skaiw 508176434Skaiw } 509176434Skaiw 510176434Skaiwnew_archive: 511176434Skaiw /* 512176434Skaiw * When operating in mode 'r', directly add those user specified 513177064Skaiw * objects which do not exist in current archive. When operating 514177064Skaiw * in mode 'q', all objects specified in command line args are 515177064Skaiw * appended to the archive, without comparing with existing ones. 516176434Skaiw */ 517176434Skaiw for (i = 0; i < bsdar->argc; i++) { 518176434Skaiw av = &bsdar->argv[i]; 519177064Skaiw if (*av != NULL && (mode == 'r' || mode == 'q')) { 520176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 521176434Skaiw if (nobj != NULL) 522176434Skaiw insert_obj(bsdar, nobj, pos); 523176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 524176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 525176434Skaiw *av = NULL; 526176434Skaiw } 527176434Skaiw } 528176434Skaiw 529176434Skaiwwrite_objs: 530176434Skaiw write_objs(bsdar); 531176434Skaiw write_cleanup(bsdar); 532176434Skaiw} 533176434Skaiw 534176434Skaiw/* 535176434Skaiw * Memory cleaning up. 536176434Skaiw */ 537176434Skaiwstatic void 538176434Skaiwwrite_cleanup(struct bsdar *bsdar) 539176434Skaiw{ 540176434Skaiw struct ar_obj *obj, *obj_temp; 541176434Skaiw 542176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 543176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 544224650Semaste free_obj(bsdar, obj); 545176434Skaiw } 546176434Skaiw 547176434Skaiw free(bsdar->as); 548176434Skaiw free(bsdar->s_so); 549176434Skaiw free(bsdar->s_sn); 550176434Skaiw bsdar->as = NULL; 551176434Skaiw bsdar->s_so = NULL; 552176434Skaiw bsdar->s_sn = NULL; 553176434Skaiw} 554176434Skaiw 555176434Skaiw/* 556285224Semaste * Fault in the buffer prior to writing as a workaround for poor performance 557285224Semaste * due to interaction with kernel fs deadlock avoidance code. See the comment 558285224Semaste * above vn_io_fault_doio() in sys/kern/vfs_vnops.c for details of the issue. 559285224Semaste */ 560285224Semastestatic void 561285224Semasteprefault_buffer(const char *buf, size_t s) 562285224Semaste{ 563285224Semaste volatile const char *p; 564285224Semaste size_t page_size; 565285224Semaste 566285224Semaste if (s == 0) 567285224Semaste return; 568285224Semaste page_size = sysconf(_SC_PAGESIZE); 569285224Semaste for (p = buf; p < buf + s; p += page_size) 570285224Semaste *p; 571285224Semaste /* 572285224Semaste * Ensure we touch the last page as well, in case the buffer is not 573285224Semaste * page-aligned. 574285224Semaste */ 575285224Semaste *(volatile const char *)(buf + s - 1); 576285224Semaste} 577285224Semaste 578285224Semaste/* 579176434Skaiw * Wrapper for archive_write_data(). 580176434Skaiw */ 581176434Skaiwstatic void 582176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 583176434Skaiw{ 584285224Semaste prefault_buffer(buf, s); 585176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 586176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 587176434Skaiw archive_error_string(a)); 588176434Skaiw} 589176434Skaiw 590176434Skaiw/* 591176434Skaiw * Write the resulting archive members. 592176434Skaiw */ 593176434Skaiwstatic void 594176434Skaiwwrite_objs(struct bsdar *bsdar) 595176434Skaiw{ 596176434Skaiw struct ar_obj *obj; 597176434Skaiw struct archive *a; 598176434Skaiw struct archive_entry *entry; 599176434Skaiw size_t s_sz; /* size of archive symbol table. */ 600176434Skaiw size_t pm_sz; /* size of pseudo members */ 601176434Skaiw int i, nr; 602176434Skaiw 603176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 604176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 605176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 606176434Skaiw 607176434Skaiw bsdar->rela_off = 0; 608176434Skaiw 609176434Skaiw /* Create archive symbol table and archive string table, if need. */ 610176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 611176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 612176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 613176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 614176434Skaiw add_to_ar_str_table(bsdar, obj->name); 615176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 616176434Skaiw } 617176434Skaiw 618176434Skaiw /* 619176434Skaiw * Pad the symbol name string table. It is treated specially because 620176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 621176434Skaiw * for other members. The size of sn table includes the pad bit. 622176434Skaiw */ 623176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 624176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 625176434Skaiw 626176434Skaiw /* 627176434Skaiw * Archive string table is padded by a "\n" as the normal members. 628176728Skaiw * The difference is that the size of archive string table counts 629176434Skaiw * in the pad bit, while normal members' size fileds do not. 630176434Skaiw */ 631176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 632176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 633176434Skaiw 634176434Skaiw /* 635176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 636176728Skaiw * convert previously stored relative offsets to absolute ones, and 637176434Skaiw * then make them Big Endian. 638176434Skaiw * 639176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 640176434Skaiw */ 641176434Skaiw 642176434Skaiw if (bsdar->s_cnt != 0) { 643176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 644176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 645176434Skaiw if (bsdar->as != NULL) 646176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 647176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 648176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 649176434Skaiw pm_sz); 650176434Skaiw } 651176434Skaiw 652176434Skaiw if ((a = archive_write_new()) == NULL) 653176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 654176434Skaiw 655176434Skaiw archive_write_set_format_ar_svr4(a); 656176434Skaiw 657176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 658176434Skaiw 659176434Skaiw /* 660176434Skaiw * write the archive symbol table, if there is one. 661176434Skaiw * If options -s is explicitly specified or we are invoked 662176434Skaiw * as ranlib, write the symbol table even if it is empty. 663176434Skaiw */ 664176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 665176434Skaiw bsdar->options & AR_S) { 666176434Skaiw entry = archive_entry_new(); 667176434Skaiw archive_entry_copy_pathname(entry, "/"); 668213643Skientzle if ((bsdar->options & AR_D) == 0) 669213643Skientzle archive_entry_set_mtime(entry, time(NULL), 0); 670176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 671176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 672176434Skaiw AC(archive_write_header(a, entry)); 673176434Skaiw nr = htobe32(bsdar->s_cnt); 674176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 675176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 676176434Skaiw bsdar->s_cnt); 677176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 678176434Skaiw archive_entry_free(entry); 679176434Skaiw } 680176434Skaiw 681176434Skaiw /* write the archive string table, if any. */ 682176434Skaiw if (bsdar->as != NULL) { 683176434Skaiw entry = archive_entry_new(); 684176434Skaiw archive_entry_copy_pathname(entry, "//"); 685176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 686176434Skaiw AC(archive_write_header(a, entry)); 687176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 688176434Skaiw archive_entry_free(entry); 689176434Skaiw } 690176434Skaiw 691176434Skaiw /* write normal members. */ 692176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 693176434Skaiw entry = archive_entry_new(); 694176434Skaiw archive_entry_copy_pathname(entry, obj->name); 695176434Skaiw archive_entry_set_uid(entry, obj->uid); 696176434Skaiw archive_entry_set_gid(entry, obj->gid); 697176434Skaiw archive_entry_set_mode(entry, obj->md); 698176434Skaiw archive_entry_set_size(entry, obj->size); 699176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 700176434Skaiw archive_entry_set_dev(entry, obj->dev); 701176434Skaiw archive_entry_set_ino(entry, obj->ino); 702176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 703176434Skaiw AC(archive_write_header(a, entry)); 704176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 705176434Skaiw archive_entry_free(entry); 706176434Skaiw } 707176434Skaiw 708176434Skaiw AC(archive_write_close(a)); 709248612Smm AC(archive_write_free(a)); 710176434Skaiw} 711176434Skaiw 712176434Skaiw/* 713176434Skaiw * Extract global symbols from ELF binary members. 714176434Skaiw */ 715176434Skaiwstatic void 716176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 717176434Skaiw{ 718176434Skaiw Elf *e; 719176434Skaiw Elf_Scn *scn; 720176434Skaiw GElf_Shdr shdr; 721176434Skaiw GElf_Sym sym; 722176434Skaiw Elf_Data *data; 723176434Skaiw char *name; 724176434Skaiw size_t n, shstrndx; 725176434Skaiw int elferr, tabndx, len, i; 726176434Skaiw 727176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 728176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 729176434Skaiw elf_errmsg(-1)); 730176434Skaiw return; 731176434Skaiw } 732176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 733222122Sbcr /* Silently ignore non-elf member. */ 734176434Skaiw elf_end(e); 735176434Skaiw return; 736176434Skaiw } 737176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 738176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 739176434Skaiw elf_errmsg(-1)); 740176434Skaiw elf_end(e); 741176434Skaiw return; 742176434Skaiw } 743176434Skaiw 744176434Skaiw tabndx = -1; 745176434Skaiw scn = NULL; 746176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 747176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 748176434Skaiw bsdar_warnc(bsdar, 0, 749176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 750176434Skaiw continue; 751176434Skaiw } 752176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 753176434Skaiw bsdar_warnc(bsdar, 0, 754176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 755176434Skaiw continue; 756176434Skaiw } 757176434Skaiw if (strcmp(name, ".strtab") == 0) { 758176434Skaiw tabndx = elf_ndxscn(scn); 759176434Skaiw break; 760176434Skaiw } 761176434Skaiw } 762176434Skaiw elferr = elf_errno(); 763176434Skaiw if (elferr != 0) 764176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 765176434Skaiw elf_errmsg(elferr)); 766176434Skaiw if (tabndx == -1) { 767176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 768176434Skaiw elf_end(e); 769176434Skaiw return; 770176434Skaiw } 771176434Skaiw 772176434Skaiw scn = NULL; 773176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 774176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 775176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 776176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 777176434Skaiw continue; 778176434Skaiw } 779176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 780176434Skaiw continue; 781176434Skaiw 782176434Skaiw data = NULL; 783176434Skaiw n = 0; 784176434Skaiw while (n < shdr.sh_size && 785176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 786176434Skaiw len = data->d_size / shdr.sh_entsize; 787176434Skaiw for (i = 0; i < len; i++) { 788176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 789176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 790176434Skaiw "gelf_getsym failed: %s", 791176434Skaiw elf_errmsg(-1)); 792176434Skaiw continue; 793176434Skaiw } 794176434Skaiw 795176434Skaiw /* keep only global or weak symbols */ 796176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 797176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 798176434Skaiw continue; 799176434Skaiw 800176434Skaiw /* keep only defined symbols */ 801176434Skaiw if (sym.st_shndx == SHN_UNDEF) 802176434Skaiw continue; 803176434Skaiw 804176434Skaiw if ((name = elf_strptr(e, tabndx, 805176434Skaiw sym.st_name)) == NULL) { 806176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 807176434Skaiw "elf_strptr failed: %s", 808176434Skaiw elf_errmsg(-1)); 809176434Skaiw continue; 810176434Skaiw } 811176434Skaiw 812176434Skaiw add_to_ar_sym_table(bsdar, name); 813176434Skaiw } 814176434Skaiw } 815176434Skaiw } 816176434Skaiw elferr = elf_errno(); 817176434Skaiw if (elferr != 0) 818176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 819176434Skaiw elf_errmsg(elferr)); 820176434Skaiw 821176434Skaiw elf_end(e); 822176434Skaiw} 823176434Skaiw 824176434Skaiw/* 825176434Skaiw * Append to the archive string table buffer. 826176434Skaiw */ 827176434Skaiwstatic void 828176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 829176434Skaiw{ 830176434Skaiw 831176434Skaiw if (bsdar->as == NULL) { 832176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 833176434Skaiw bsdar->as_sz = 0; 834176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 835176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 836176434Skaiw } 837176434Skaiw 838176434Skaiw /* 839176434Skaiw * The space required for holding one member name in as table includes: 840176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 841176434Skaiw */ 842176728Skaiw while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 843176434Skaiw bsdar->as_cap *= 2; 844176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 845176434Skaiw if (bsdar->as == NULL) 846176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 847176434Skaiw } 848176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 849176434Skaiw bsdar->as_sz += strlen(name); 850176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 851176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 852176434Skaiw} 853176434Skaiw 854176434Skaiw/* 855176434Skaiw * Append to the archive symbol table buffer. 856176434Skaiw */ 857176434Skaiwstatic void 858176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 859176434Skaiw{ 860176434Skaiw 861176434Skaiw if (bsdar->s_so == NULL) { 862176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 863176434Skaiw NULL) 864176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 865176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 866176434Skaiw bsdar->s_cnt = 0; 867176434Skaiw } 868176434Skaiw 869176434Skaiw if (bsdar->s_sn == NULL) { 870176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 871176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 872176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 873176434Skaiw bsdar->s_sn_sz = 0; 874176434Skaiw } 875176434Skaiw 876176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 877176434Skaiw bsdar->s_so_cap *= 2; 878176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 879176434Skaiw if (bsdar->s_so == NULL) 880176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 881176434Skaiw } 882176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 883176434Skaiw bsdar->s_cnt++; 884176434Skaiw 885176434Skaiw /* 886176434Skaiw * The space required for holding one symbol name in sn table includes: 887176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 888176434Skaiw */ 889176728Skaiw while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 890176434Skaiw bsdar->s_sn_cap *= 2; 891176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 892176434Skaiw if (bsdar->s_sn == NULL) 893176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 894176434Skaiw } 895176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 896176434Skaiw bsdar->s_sn_sz += strlen(name); 897176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 898176434Skaiw} 899