write.c revision 213643
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 213643 2010-10-09 05:31:08Z kientzle $"); 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 166213643Skientzle /* 167213643Skientzle * When option '-D' is specified, mtime and UID / GID from the file 168213643Skientzle * will be replaced with 0, and file mode with 644. This ensures that 169213643Skientzle * checksums will match for two archives containing the exact same 170213643Skientzle * files. 171213643Skientzle */ 172213643Skientzle if (bsdar->options & AR_D) { 173213643Skientzle obj->uid = 0; 174213643Skientzle obj->gid = 0; 175213643Skientzle obj->mtime = 0; 176213643Skientzle obj->md = S_IFREG | 0644; 177213643Skientzle } else { 178213643Skientzle obj->uid = sb.st_uid; 179213643Skientzle obj->gid = sb.st_gid; 180213643Skientzle obj->mtime = sb.st_mtime; 181213643Skientzle obj->md = sb.st_mode; 182213643Skientzle } 183176434Skaiw obj->size = sb.st_size; 184176434Skaiw obj->dev = sb.st_dev; 185176434Skaiw obj->ino = sb.st_ino; 186176525Skaiw 187176525Skaiw if (obj->size == 0) { 188176525Skaiw obj->maddr = NULL; 189176528Skaiw return (obj); 190176525Skaiw } 191176525Skaiw 192176434Skaiw if ((obj->maddr = mmap(NULL, obj->size, PROT_READ, 193176434Skaiw MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) { 194176434Skaiw bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name); 195176434Skaiw goto giveup; 196176434Skaiw } 197176434Skaiw if (close(obj->fd) < 0) 198176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 199176434Skaiw obj->name); 200176434Skaiw 201176528Skaiw return (obj); 202176434Skaiw 203176434Skaiwgiveup: 204176434Skaiw if (close(obj->fd) < 0) 205176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s", 206176434Skaiw obj->name); 207176434Skaiw free(obj->name); 208176434Skaiw free(obj); 209176528Skaiw return (NULL); 210176434Skaiw} 211176434Skaiw 212176434Skaiw/* 213176434Skaiw * Insert obj to the tail, or before/after the pos obj. 214176434Skaiw */ 215176434Skaiwstatic void 216176434Skaiwinsert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos) 217176434Skaiw{ 218176434Skaiw if (obj == NULL) 219176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj"); 220176434Skaiw 221176434Skaiw if (pos == NULL || obj == pos) 222176434Skaiw /* 223176434Skaiw * If the object to move happens to be the posistion obj, 224176434Skaiw * or if there is not a pos obj, move it to tail. 225176434Skaiw */ 226176434Skaiw goto tail; 227176434Skaiw 228176434Skaiw if (bsdar->options & AR_B) { 229176434Skaiw TAILQ_INSERT_BEFORE(pos, obj, objs); 230176434Skaiw return; 231176434Skaiw } 232176434Skaiw if (bsdar->options & AR_A) { 233176434Skaiw TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs); 234176434Skaiw return; 235176434Skaiw } 236176434Skaiw 237176434Skaiwtail: 238176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 239176434Skaiw 240176434Skaiw} 241176434Skaiw 242176434Skaiw/* 243183218Skaiw * Read objects from archive into v_obj list. Note that checkargv is 244183218Skaiw * set when read_objs is used to read objects from the target of 245183218Skaiw * ADDLIB command (ar script mode), in this case argv array possibly 246183218Skaiw * specifies the members ADDLIB want. 247176434Skaiw */ 248176434Skaiwstatic void 249183218Skaiwread_objs(struct bsdar *bsdar, const char *archive, int checkargv) 250176434Skaiw{ 251176434Skaiw struct archive *a; 252176434Skaiw struct archive_entry *entry; 253183218Skaiw struct ar_obj *obj; 254176434Skaiw const char *name; 255176434Skaiw const char *bname; 256176434Skaiw char *buff; 257176434Skaiw char **av; 258176434Skaiw size_t size; 259183218Skaiw int i, r, find; 260176434Skaiw 261176434Skaiw if ((a = archive_read_new()) == NULL) 262176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 263208189Skaiw archive_read_support_compression_none(a); 264176434Skaiw archive_read_support_format_ar(a); 265183218Skaiw AC(archive_read_open_filename(a, archive, DEF_BLKSZ)); 266176434Skaiw for (;;) { 267176434Skaiw r = archive_read_next_header(a, &entry); 268176434Skaiw if (r == ARCHIVE_FATAL) 269176434Skaiw bsdar_errc(bsdar, EX_DATAERR, 0, "%s", 270176434Skaiw archive_error_string(a)); 271176434Skaiw if (r == ARCHIVE_EOF) 272176434Skaiw break; 273176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY) 274176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 275176434Skaiw if (r == ARCHIVE_RETRY) { 276176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 277176434Skaiw continue; 278176434Skaiw } 279176434Skaiw 280176434Skaiw name = archive_entry_pathname(entry); 281176434Skaiw 282176434Skaiw /* 283176434Skaiw * skip pseudo members. 284176434Skaiw */ 285176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 286176434Skaiw continue; 287176434Skaiw 288183218Skaiw /* 289183218Skaiw * If checkargv is set, only read those members specified 290183218Skaiw * in argv. 291183218Skaiw */ 292183218Skaiw if (checkargv && bsdar->argc > 0) { 293183218Skaiw find = 0; 294183218Skaiw for(i = 0; i < bsdar->argc; i++) { 295183218Skaiw av = &bsdar->argv[i]; 296183218Skaiw if (*av == NULL) 297183218Skaiw continue; 298183218Skaiw if ((bname = basename(*av)) == NULL) 299183218Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 300183218Skaiw "basename failed"); 301183218Skaiw if (strcmp(bname, name) != 0) 302183218Skaiw continue; 303183218Skaiw 304183218Skaiw *av = NULL; 305183218Skaiw find = 1; 306183218Skaiw break; 307183218Skaiw } 308183218Skaiw if (!find) 309183218Skaiw continue; 310183218Skaiw } 311183218Skaiw 312176434Skaiw size = archive_entry_size(entry); 313176434Skaiw 314176728Skaiw if (size > 0) { 315176728Skaiw if ((buff = malloc(size)) == NULL) 316176728Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 317176728Skaiw "malloc failed"); 318176728Skaiw if (archive_read_data(a, buff, size) != (ssize_t)size) { 319176728Skaiw bsdar_warnc(bsdar, 0, "%s", 320176728Skaiw archive_error_string(a)); 321176728Skaiw free(buff); 322176728Skaiw continue; 323176728Skaiw } 324176728Skaiw } else 325176728Skaiw buff = NULL; 326176728Skaiw 327176434Skaiw obj = malloc(sizeof(struct ar_obj)); 328176434Skaiw if (obj == NULL) 329176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 330176434Skaiw obj->maddr = buff; 331176434Skaiw if ((obj->name = strdup(name)) == NULL) 332176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 333176434Skaiw obj->size = size; 334176434Skaiw obj->uid = archive_entry_uid(entry); 335176434Skaiw obj->gid = archive_entry_gid(entry); 336176434Skaiw obj->md = archive_entry_mode(entry); 337176434Skaiw obj->mtime = archive_entry_mtime(entry); 338176434Skaiw obj->dev = 0; 339176434Skaiw obj->ino = 0; 340176434Skaiw 341176434Skaiw /* 342176434Skaiw * Objects from archive have obj->fd set to -1, 343176434Skaiw * for the ease of cleaning up. 344176434Skaiw */ 345176434Skaiw obj->fd = -1; 346176434Skaiw TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs); 347176434Skaiw } 348176434Skaiw AC(archive_read_close(a)); 349176434Skaiw AC(archive_read_finish(a)); 350183218Skaiw} 351176434Skaiw 352183218Skaiw/* 353183218Skaiw * Determine the constitution of resulting archive. 354183218Skaiw */ 355183218Skaiwstatic void 356183218Skaiwwrite_archive(struct bsdar *bsdar, char mode) 357183218Skaiw{ 358183218Skaiw struct ar_obj *nobj, *obj, *obj_temp, *pos; 359183218Skaiw struct stat sb; 360183218Skaiw const char *bname; 361183218Skaiw char **av; 362183218Skaiw int i; 363183218Skaiw 364183218Skaiw TAILQ_INIT(&bsdar->v_obj); 365183218Skaiw nobj = NULL; 366183218Skaiw pos = NULL; 367183218Skaiw memset(&sb, 0, sizeof(sb)); 368183218Skaiw 369176434Skaiw /* 370183218Skaiw * Test if the specified archive exists, to figure out 371183218Skaiw * whether we are creating one here. 372183218Skaiw */ 373183218Skaiw if (stat(bsdar->filename, &sb) != 0) { 374183218Skaiw if (errno != ENOENT) { 375183218Skaiw bsdar_warnc(bsdar, 0, "stat %s failed", 376183218Skaiw bsdar->filename); 377183218Skaiw return; 378183218Skaiw } 379183218Skaiw 380183218Skaiw /* We do not create archive in mode 'd', 'm' and 's'. */ 381183218Skaiw if (mode != 'r' && mode != 'q') { 382183218Skaiw bsdar_warnc(bsdar, 0, "%s: no such file", 383183218Skaiw bsdar->filename); 384183218Skaiw return; 385183218Skaiw } 386183218Skaiw 387183218Skaiw /* Issue a warning if -c is not specified when creating. */ 388183218Skaiw if (!(bsdar->options & AR_C)) 389183218Skaiw bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename); 390183218Skaiw goto new_archive; 391183218Skaiw } 392183218Skaiw 393183218Skaiw /* 394183218Skaiw * First read members from existing archive. 395183218Skaiw */ 396183218Skaiw read_objs(bsdar, bsdar->filename, 0); 397183218Skaiw 398183218Skaiw /* 399176434Skaiw * For mode 's', no member will be moved, deleted or replaced. 400176434Skaiw */ 401176434Skaiw if (mode == 's') 402176434Skaiw goto write_objs; 403176434Skaiw 404176434Skaiw /* 405177064Skaiw * For mode 'q', we don't need to adjust existing members either. 406177064Skaiw * Also, -a, -b and -i are ignored in this mode. New members are 407177064Skaiw * always inserted at tail. 408177064Skaiw */ 409177064Skaiw if (mode == 'q') 410177064Skaiw goto new_archive; 411177064Skaiw 412177064Skaiw /* 413183218Skaiw * Mode 'A' adds the contents of another archive to the tail of 414183218Skaiw * current archive. Note that mode 'A' is a special mode for the 415183218Skaiw * ADDLIB command of the ar script mode. Currently there is no 416183218Skaiw * access to this function from the ar command line mode. 417183218Skaiw */ 418183218Skaiw if (mode == 'A') { 419183218Skaiw /* 420183218Skaiw * Read objects from the target archive of ADDLIB command. 421183218Skaiw * If there are members spcified in argv, read those members 422183218Skaiw * only, otherwise the entire archive will be read. 423183218Skaiw */ 424183218Skaiw read_objs(bsdar, bsdar->addlib, 1); 425183218Skaiw goto write_objs; 426183218Skaiw } 427183218Skaiw 428183218Skaiw /* 429176434Skaiw * Try to find the position member specified by user. 430176434Skaiw */ 431176434Skaiw if (bsdar->options & AR_A || bsdar->options & AR_B) { 432176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 433176434Skaiw if (strcmp(obj->name, bsdar->posarg) == 0) { 434176434Skaiw pos = obj; 435176434Skaiw break; 436176434Skaiw } 437176434Skaiw } 438176434Skaiw 439176434Skaiw /* 440176434Skaiw * If can't find `pos' specified by user, 441176434Skaiw * sliently insert objects at tail. 442176434Skaiw */ 443176434Skaiw if (pos == NULL) 444176434Skaiw bsdar->options &= ~(AR_A | AR_B); 445176434Skaiw } 446176434Skaiw 447176434Skaiw for (i = 0; i < bsdar->argc; i++) { 448176434Skaiw av = &bsdar->argv[i]; 449176434Skaiw 450176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 451176434Skaiw if ((bname = basename(*av)) == NULL) 452176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 453176434Skaiw "basename failed"); 454176434Skaiw if (bsdar->options & AR_TR) { 455176434Skaiw if (strncmp(bname, obj->name, _TRUNCATE_LEN)) 456176434Skaiw continue; 457176434Skaiw } else 458176434Skaiw if (strcmp(bname, obj->name) != 0) 459176434Skaiw continue; 460176434Skaiw 461176434Skaiw if (mode == 'r') { 462176434Skaiw /* 463176434Skaiw * if the new member is not qualified 464176434Skaiw * to replace the old one, skip it. 465176434Skaiw */ 466176434Skaiw nobj = create_obj_from_file(bsdar, *av, 467176434Skaiw obj->mtime); 468176434Skaiw if (nobj == NULL) 469176434Skaiw goto skip_obj; 470176434Skaiw } 471176434Skaiw 472176434Skaiw if (bsdar->options & AR_V) 473176434Skaiw (void)fprintf(stdout, "%c - %s\n", mode, 474176434Skaiw *av); 475176434Skaiw 476176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 477176434Skaiw if (mode == 'd' || mode == 'r') { 478176434Skaiw free(obj->maddr); 479176434Skaiw free(obj->name); 480176434Skaiw free(obj); 481176434Skaiw } 482176434Skaiw 483176434Skaiw if (mode == 'm') 484176434Skaiw insert_obj(bsdar, obj, pos); 485176434Skaiw if (mode == 'r') 486176434Skaiw insert_obj(bsdar, nobj, pos); 487176434Skaiw 488176434Skaiw skip_obj: 489176434Skaiw *av = NULL; 490176434Skaiw break; 491176434Skaiw } 492176434Skaiw 493176434Skaiw } 494176434Skaiw 495176434Skaiwnew_archive: 496176434Skaiw /* 497176434Skaiw * When operating in mode 'r', directly add those user specified 498177064Skaiw * objects which do not exist in current archive. When operating 499177064Skaiw * in mode 'q', all objects specified in command line args are 500177064Skaiw * appended to the archive, without comparing with existing ones. 501176434Skaiw */ 502176434Skaiw for (i = 0; i < bsdar->argc; i++) { 503176434Skaiw av = &bsdar->argv[i]; 504177064Skaiw if (*av != NULL && (mode == 'r' || mode == 'q')) { 505176434Skaiw nobj = create_obj_from_file(bsdar, *av, 0); 506176434Skaiw if (nobj != NULL) 507176434Skaiw insert_obj(bsdar, nobj, pos); 508176434Skaiw if (bsdar->options & AR_V && nobj != NULL) 509176434Skaiw (void)fprintf(stdout, "a - %s\n", *av); 510176434Skaiw *av = NULL; 511176434Skaiw } 512176434Skaiw } 513176434Skaiw 514176434Skaiwwrite_objs: 515176434Skaiw write_objs(bsdar); 516176434Skaiw write_cleanup(bsdar); 517176434Skaiw} 518176434Skaiw 519176434Skaiw/* 520176434Skaiw * Memory cleaning up. 521176434Skaiw */ 522176434Skaiwstatic void 523176434Skaiwwrite_cleanup(struct bsdar *bsdar) 524176434Skaiw{ 525176434Skaiw struct ar_obj *obj, *obj_temp; 526176434Skaiw 527176434Skaiw TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) { 528176434Skaiw if (obj->fd == -1) 529176434Skaiw free(obj->maddr); 530176434Skaiw else 531176525Skaiw if (obj->maddr != NULL && munmap(obj->maddr, obj->size)) 532176434Skaiw bsdar_warnc(bsdar, errno, 533176434Skaiw "can't munmap file: %s", obj->name); 534176434Skaiw TAILQ_REMOVE(&bsdar->v_obj, obj, objs); 535176525Skaiw free(obj->name); 536176434Skaiw free(obj); 537176434Skaiw } 538176434Skaiw 539176434Skaiw free(bsdar->as); 540176434Skaiw free(bsdar->s_so); 541176434Skaiw free(bsdar->s_sn); 542176434Skaiw bsdar->as = NULL; 543176434Skaiw bsdar->s_so = NULL; 544176434Skaiw bsdar->s_sn = NULL; 545176434Skaiw} 546176434Skaiw 547176434Skaiw/* 548176434Skaiw * Wrapper for archive_write_data(). 549176434Skaiw */ 550176434Skaiwstatic void 551176434Skaiwwrite_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s) 552176434Skaiw{ 553176434Skaiw if (archive_write_data(a, buf, s) != (ssize_t)s) 554176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s", 555176434Skaiw archive_error_string(a)); 556176434Skaiw} 557176434Skaiw 558176434Skaiw/* 559176434Skaiw * Write the resulting archive members. 560176434Skaiw */ 561176434Skaiwstatic void 562176434Skaiwwrite_objs(struct bsdar *bsdar) 563176434Skaiw{ 564176434Skaiw struct ar_obj *obj; 565176434Skaiw struct archive *a; 566176434Skaiw struct archive_entry *entry; 567176434Skaiw size_t s_sz; /* size of archive symbol table. */ 568176434Skaiw size_t pm_sz; /* size of pseudo members */ 569176434Skaiw int i, nr; 570176434Skaiw 571176434Skaiw if (elf_version(EV_CURRENT) == EV_NONE) 572176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, 573176434Skaiw "ELF library initialization failed: %s", elf_errmsg(-1)); 574176434Skaiw 575176434Skaiw bsdar->rela_off = 0; 576176434Skaiw 577176434Skaiw /* Create archive symbol table and archive string table, if need. */ 578176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 579176525Skaiw if (!(bsdar->options & AR_SS) && obj->maddr != NULL) 580176434Skaiw create_symtab_entry(bsdar, obj->maddr, obj->size); 581176434Skaiw if (strlen(obj->name) > _MAXNAMELEN_SVR4) 582176434Skaiw add_to_ar_str_table(bsdar, obj->name); 583176434Skaiw bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2; 584176434Skaiw } 585176434Skaiw 586176434Skaiw /* 587176434Skaiw * Pad the symbol name string table. It is treated specially because 588176434Skaiw * symbol name table should be padded by a '\0', not the common '\n' 589176434Skaiw * for other members. The size of sn table includes the pad bit. 590176434Skaiw */ 591176434Skaiw if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0) 592176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 593176434Skaiw 594176434Skaiw /* 595176434Skaiw * Archive string table is padded by a "\n" as the normal members. 596176728Skaiw * The difference is that the size of archive string table counts 597176434Skaiw * in the pad bit, while normal members' size fileds do not. 598176434Skaiw */ 599176434Skaiw if (bsdar->as != NULL && bsdar->as_sz % 2 != 0) 600176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 601176434Skaiw 602176434Skaiw /* 603176434Skaiw * If there is a symbol table, calculate the size of pseudo members, 604176728Skaiw * convert previously stored relative offsets to absolute ones, and 605176434Skaiw * then make them Big Endian. 606176434Skaiw * 607176434Skaiw * absolute_offset = htobe32(relative_offset + size_of_pseudo_members) 608176434Skaiw */ 609176434Skaiw 610176434Skaiw if (bsdar->s_cnt != 0) { 611176434Skaiw s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz; 612176434Skaiw pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz); 613176434Skaiw if (bsdar->as != NULL) 614176434Skaiw pm_sz += _ARHDR_LEN + bsdar->as_sz; 615176434Skaiw for (i = 0; (size_t)i < bsdar->s_cnt; i++) 616176434Skaiw *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) + 617176434Skaiw pm_sz); 618176434Skaiw } 619176434Skaiw 620176434Skaiw if ((a = archive_write_new()) == NULL) 621176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed"); 622176434Skaiw 623176434Skaiw archive_write_set_format_ar_svr4(a); 624208189Skaiw archive_write_set_compression_none(a); 625176434Skaiw 626176434Skaiw AC(archive_write_open_filename(a, bsdar->filename)); 627176434Skaiw 628176434Skaiw /* 629176434Skaiw * write the archive symbol table, if there is one. 630176434Skaiw * If options -s is explicitly specified or we are invoked 631176434Skaiw * as ranlib, write the symbol table even if it is empty. 632176434Skaiw */ 633176434Skaiw if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) || 634176434Skaiw bsdar->options & AR_S) { 635176434Skaiw entry = archive_entry_new(); 636176434Skaiw archive_entry_copy_pathname(entry, "/"); 637213643Skientzle if ((bsdar->options & AR_D) == 0) 638213643Skientzle archive_entry_set_mtime(entry, time(NULL), 0); 639176434Skaiw archive_entry_set_size(entry, (bsdar->s_cnt + 1) * 640176434Skaiw sizeof(uint32_t) + bsdar->s_sn_sz); 641176434Skaiw AC(archive_write_header(a, entry)); 642176434Skaiw nr = htobe32(bsdar->s_cnt); 643176434Skaiw write_data(bsdar, a, &nr, sizeof(uint32_t)); 644176434Skaiw write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) * 645176434Skaiw bsdar->s_cnt); 646176434Skaiw write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz); 647176434Skaiw archive_entry_free(entry); 648176434Skaiw } 649176434Skaiw 650176434Skaiw /* write the archive string table, if any. */ 651176434Skaiw if (bsdar->as != NULL) { 652176434Skaiw entry = archive_entry_new(); 653176434Skaiw archive_entry_copy_pathname(entry, "//"); 654176434Skaiw archive_entry_set_size(entry, bsdar->as_sz); 655176434Skaiw AC(archive_write_header(a, entry)); 656176434Skaiw write_data(bsdar, a, bsdar->as, bsdar->as_sz); 657176434Skaiw archive_entry_free(entry); 658176434Skaiw } 659176434Skaiw 660176434Skaiw /* write normal members. */ 661176434Skaiw TAILQ_FOREACH(obj, &bsdar->v_obj, objs) { 662176434Skaiw entry = archive_entry_new(); 663176434Skaiw archive_entry_copy_pathname(entry, obj->name); 664176434Skaiw archive_entry_set_uid(entry, obj->uid); 665176434Skaiw archive_entry_set_gid(entry, obj->gid); 666176434Skaiw archive_entry_set_mode(entry, obj->md); 667176434Skaiw archive_entry_set_size(entry, obj->size); 668176434Skaiw archive_entry_set_mtime(entry, obj->mtime, 0); 669176434Skaiw archive_entry_set_dev(entry, obj->dev); 670176434Skaiw archive_entry_set_ino(entry, obj->ino); 671176434Skaiw archive_entry_set_filetype(entry, AE_IFREG); 672176434Skaiw AC(archive_write_header(a, entry)); 673176434Skaiw write_data(bsdar, a, obj->maddr, obj->size); 674176434Skaiw archive_entry_free(entry); 675176434Skaiw } 676176434Skaiw 677176434Skaiw AC(archive_write_close(a)); 678176434Skaiw AC(archive_write_finish(a)); 679176434Skaiw} 680176434Skaiw 681176434Skaiw/* 682176434Skaiw * Extract global symbols from ELF binary members. 683176434Skaiw */ 684176434Skaiwstatic void 685176434Skaiwcreate_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size) 686176434Skaiw{ 687176434Skaiw Elf *e; 688176434Skaiw Elf_Scn *scn; 689176434Skaiw GElf_Shdr shdr; 690176434Skaiw GElf_Sym sym; 691176434Skaiw Elf_Data *data; 692176434Skaiw char *name; 693176434Skaiw size_t n, shstrndx; 694176434Skaiw int elferr, tabndx, len, i; 695176434Skaiw 696176434Skaiw if ((e = elf_memory(maddr, size)) == NULL) { 697176434Skaiw bsdar_warnc(bsdar, 0, "elf_memory() failed: %s", 698176434Skaiw elf_errmsg(-1)); 699176434Skaiw return; 700176434Skaiw } 701176434Skaiw if (elf_kind(e) != ELF_K_ELF) { 702176434Skaiw /* Sliently ignore non-elf member. */ 703176434Skaiw elf_end(e); 704176434Skaiw return; 705176434Skaiw } 706176434Skaiw if (elf_getshstrndx(e, &shstrndx) == 0) { 707176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s", 708176434Skaiw elf_errmsg(-1)); 709176434Skaiw elf_end(e); 710176434Skaiw return; 711176434Skaiw } 712176434Skaiw 713176434Skaiw tabndx = -1; 714176434Skaiw scn = NULL; 715176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 716176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 717176434Skaiw bsdar_warnc(bsdar, 0, 718176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 719176434Skaiw continue; 720176434Skaiw } 721176434Skaiw if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) { 722176434Skaiw bsdar_warnc(bsdar, 0, 723176434Skaiw "elf_strptr failed: %s", elf_errmsg(-1)); 724176434Skaiw continue; 725176434Skaiw } 726176434Skaiw if (strcmp(name, ".strtab") == 0) { 727176434Skaiw tabndx = elf_ndxscn(scn); 728176434Skaiw break; 729176434Skaiw } 730176434Skaiw } 731176434Skaiw elferr = elf_errno(); 732176434Skaiw if (elferr != 0) 733176434Skaiw bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s", 734176434Skaiw elf_errmsg(elferr)); 735176434Skaiw if (tabndx == -1) { 736176434Skaiw bsdar_warnc(bsdar, 0, "can't find .strtab section"); 737176434Skaiw elf_end(e); 738176434Skaiw return; 739176434Skaiw } 740176434Skaiw 741176434Skaiw scn = NULL; 742176434Skaiw while ((scn = elf_nextscn(e, scn)) != NULL) { 743176434Skaiw if (gelf_getshdr(scn, &shdr) != &shdr) { 744176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 745176434Skaiw "elf_getshdr failed: %s", elf_errmsg(-1)); 746176434Skaiw continue; 747176434Skaiw } 748176434Skaiw if (shdr.sh_type != SHT_SYMTAB) 749176434Skaiw continue; 750176434Skaiw 751176434Skaiw data = NULL; 752176434Skaiw n = 0; 753176434Skaiw while (n < shdr.sh_size && 754176434Skaiw (data = elf_getdata(scn, data)) != NULL) { 755176434Skaiw len = data->d_size / shdr.sh_entsize; 756176434Skaiw for (i = 0; i < len; i++) { 757176434Skaiw if (gelf_getsym(data, i, &sym) != &sym) { 758176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 759176434Skaiw "gelf_getsym failed: %s", 760176434Skaiw elf_errmsg(-1)); 761176434Skaiw continue; 762176434Skaiw } 763176434Skaiw 764176434Skaiw /* keep only global or weak symbols */ 765176434Skaiw if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL && 766176434Skaiw GELF_ST_BIND(sym.st_info) != STB_WEAK) 767176434Skaiw continue; 768176434Skaiw 769176434Skaiw /* keep only defined symbols */ 770176434Skaiw if (sym.st_shndx == SHN_UNDEF) 771176434Skaiw continue; 772176434Skaiw 773176434Skaiw if ((name = elf_strptr(e, tabndx, 774176434Skaiw sym.st_name)) == NULL) { 775176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, 776176434Skaiw "elf_strptr failed: %s", 777176434Skaiw elf_errmsg(-1)); 778176434Skaiw continue; 779176434Skaiw } 780176434Skaiw 781176434Skaiw add_to_ar_sym_table(bsdar, name); 782176434Skaiw } 783176434Skaiw } 784176434Skaiw } 785176434Skaiw elferr = elf_errno(); 786176434Skaiw if (elferr != 0) 787176434Skaiw bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s", 788176434Skaiw elf_errmsg(elferr)); 789176434Skaiw 790176434Skaiw elf_end(e); 791176434Skaiw} 792176434Skaiw 793176434Skaiw/* 794176434Skaiw * Append to the archive string table buffer. 795176434Skaiw */ 796176434Skaiwstatic void 797176434Skaiwadd_to_ar_str_table(struct bsdar *bsdar, const char *name) 798176434Skaiw{ 799176434Skaiw 800176434Skaiw if (bsdar->as == NULL) { 801176434Skaiw bsdar->as_cap = _INIT_AS_CAP; 802176434Skaiw bsdar->as_sz = 0; 803176434Skaiw if ((bsdar->as = malloc(bsdar->as_cap)) == NULL) 804176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 805176434Skaiw } 806176434Skaiw 807176434Skaiw /* 808176434Skaiw * The space required for holding one member name in as table includes: 809176434Skaiw * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding). 810176434Skaiw */ 811176728Skaiw while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) { 812176434Skaiw bsdar->as_cap *= 2; 813176434Skaiw bsdar->as = realloc(bsdar->as, bsdar->as_cap); 814176434Skaiw if (bsdar->as == NULL) 815176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 816176434Skaiw } 817176434Skaiw strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name)); 818176434Skaiw bsdar->as_sz += strlen(name); 819176434Skaiw bsdar->as[bsdar->as_sz++] = '/'; 820176434Skaiw bsdar->as[bsdar->as_sz++] = '\n'; 821176434Skaiw} 822176434Skaiw 823176434Skaiw/* 824176434Skaiw * Append to the archive symbol table buffer. 825176434Skaiw */ 826176434Skaiwstatic void 827176434Skaiwadd_to_ar_sym_table(struct bsdar *bsdar, const char *name) 828176434Skaiw{ 829176434Skaiw 830176434Skaiw if (bsdar->s_so == NULL) { 831176434Skaiw if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) == 832176434Skaiw NULL) 833176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 834176434Skaiw bsdar->s_so_cap = _INIT_SYMOFF_CAP; 835176434Skaiw bsdar->s_cnt = 0; 836176434Skaiw } 837176434Skaiw 838176434Skaiw if (bsdar->s_sn == NULL) { 839176434Skaiw if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL) 840176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 841176434Skaiw bsdar->s_sn_cap = _INIT_SYMNAME_CAP; 842176434Skaiw bsdar->s_sn_sz = 0; 843176434Skaiw } 844176434Skaiw 845176434Skaiw if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) { 846176434Skaiw bsdar->s_so_cap *= 2; 847176434Skaiw bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap); 848176434Skaiw if (bsdar->s_so == NULL) 849176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 850176434Skaiw } 851176434Skaiw bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off; 852176434Skaiw bsdar->s_cnt++; 853176434Skaiw 854176434Skaiw /* 855176434Skaiw * The space required for holding one symbol name in sn table includes: 856176434Skaiw * strlen(name) + (1 for '\n') + (possibly 1 for padding). 857176434Skaiw */ 858176728Skaiw while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) { 859176434Skaiw bsdar->s_sn_cap *= 2; 860176434Skaiw bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap); 861176434Skaiw if (bsdar->s_sn == NULL) 862176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed"); 863176434Skaiw } 864176434Skaiw strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name)); 865176434Skaiw bsdar->s_sn_sz += strlen(name); 866176434Skaiw bsdar->s_sn[bsdar->s_sn_sz++] = '\0'; 867176434Skaiw} 868