2 * Copyright (c) 2007 Kai Wang
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/endian.h>
32 #include <sys/queue.h>
35 #include <archive_entry.h>
48 #define _ARMAG_LEN 8 /* length of ar magic string */
49 #define _ARHDR_LEN 60 /* length of ar header */
50 #define _INIT_AS_CAP 128 /* initial archive string table size */
51 #define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */
52 #define _INIT_SYMNAME_CAP 1024 /* initial sn table size */
53 #define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */
54 #define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */
56 static void add_to_ar_str_table(struct bsdar *bsdar, const char *name);
57 static void add_to_ar_sym_table(struct bsdar *bsdar, const char *name);
58 static struct ar_obj *create_obj_from_file(struct bsdar *bsdar,
59 const char *name, time_t mtime);
60 static void create_symtab_entry(struct bsdar *bsdar, void *maddr,
62 static void free_obj(struct bsdar *bsdar, struct ar_obj *obj);
63 static void insert_obj(struct bsdar *bsdar, struct ar_obj *obj,
65 static void prefault_buffer(const char *buf, size_t s);
66 static void read_objs(struct bsdar *bsdar, const char *archive,
68 static void write_archive(struct bsdar *bsdar, char mode);
69 static void write_cleanup(struct bsdar *bsdar);
70 static void write_data(struct bsdar *bsdar, struct archive *a,
71 const void *buf, size_t s);
72 static void write_objs(struct bsdar *bsdar);
75 ar_mode_d(struct bsdar *bsdar)
78 write_archive(bsdar, 'd');
82 ar_mode_m(struct bsdar *bsdar)
85 write_archive(bsdar, 'm');
89 ar_mode_q(struct bsdar *bsdar)
92 write_archive(bsdar, 'q');
96 ar_mode_r(struct bsdar *bsdar)
99 write_archive(bsdar, 'r');
103 ar_mode_s(struct bsdar *bsdar)
106 write_archive(bsdar, 's');
110 ar_mode_A(struct bsdar *bsdar)
113 write_archive(bsdar, 'A');
117 * Create object from file, return created obj upon success, or NULL
118 * when an error occurs or the member is not newer than existing
119 * one while -u is specified.
121 static struct ar_obj *
122 create_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime)
131 obj = malloc(sizeof(struct ar_obj));
133 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
134 if ((obj->fd = open(name, O_RDONLY, 0)) < 0) {
135 bsdar_warnc(bsdar, errno, "can't open file: %s", name);
140 if ((bname = basename(name)) == NULL)
141 bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed");
142 if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) {
143 if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL)
144 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
145 (void)strncpy(obj->name, bname, _TRUNCATE_LEN);
146 obj->name[_TRUNCATE_LEN] = '\0';
148 if ((obj->name = strdup(bname)) == NULL)
149 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
151 if (fstat(obj->fd, &sb) < 0) {
152 bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name);
155 if (!S_ISREG(sb.st_mode)) {
156 bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name);
161 * When option '-u' is specified and member is not newer than the
162 * existing one, the replace will not happen. While if mtime == 0,
163 * which indicates that this is to "replace a none exist member",
164 * the replace will proceed regardless of '-u'.
166 if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime)
170 * When option '-D' is specified, mtime and UID / GID from the file
171 * will be replaced with 0, and file mode with 644. This ensures that
172 * checksums will match for two archives containing the exact same
175 if (bsdar->options & AR_D) {
179 obj->md = S_IFREG | 0644;
181 obj->uid = sb.st_uid;
182 obj->gid = sb.st_gid;
183 obj->mtime = sb.st_mtime;
184 obj->md = sb.st_mode;
186 obj->size = sb.st_size;
187 obj->dev = sb.st_dev;
188 obj->ino = sb.st_ino;
190 if (obj->size == 0) {
195 if ((obj->maddr = mmap(NULL, obj->size, PROT_READ,
196 MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) {
197 bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name);
200 if (close(obj->fd) < 0)
201 bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
207 if (close(obj->fd) < 0)
208 bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
216 * Free object itself and its associated allocations.
219 free_obj(struct bsdar *bsdar, struct ar_obj *obj)
224 if (obj->maddr != NULL && munmap(obj->maddr, obj->size))
225 bsdar_warnc(bsdar, errno,
226 "can't munmap file: %s", obj->name);
232 * Insert obj to the tail, or before/after the pos obj.
235 insert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos)
238 bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj");
240 if (pos == NULL || obj == pos)
242 * If the object to move happens to be the position obj,
243 * or if there is not a pos obj, move it to tail.
247 if (bsdar->options & AR_B) {
248 TAILQ_INSERT_BEFORE(pos, obj, objs);
251 if (bsdar->options & AR_A) {
252 TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs);
257 TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
262 * Read objects from archive into v_obj list. Note that checkargv is
263 * set when read_objs is used to read objects from the target of
264 * ADDLIB command (ar script mode), in this case argv array possibly
265 * specifies the members ADDLIB want.
268 read_objs(struct bsdar *bsdar, const char *archive, int checkargv)
271 struct archive_entry *entry;
280 if ((a = archive_read_new()) == NULL)
281 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed");
282 archive_read_support_format_ar(a);
283 AC(archive_read_open_filename(a, archive, DEF_BLKSZ));
285 r = archive_read_next_header(a, &entry);
286 if (r == ARCHIVE_FATAL)
287 bsdar_errc(bsdar, EX_DATAERR, 0, "%s",
288 archive_error_string(a));
289 if (r == ARCHIVE_EOF)
291 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY)
292 bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
293 if (r == ARCHIVE_RETRY) {
294 bsdar_warnc(bsdar, 0, "Retrying...");
298 name = archive_entry_pathname(entry);
301 * skip pseudo members.
303 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0)
307 * If checkargv is set, only read those members specified
310 if (checkargv && bsdar->argc > 0) {
312 for(i = 0; i < bsdar->argc; i++) {
313 av = &bsdar->argv[i];
316 if ((bname = basename(*av)) == NULL)
317 bsdar_errc(bsdar, EX_SOFTWARE, errno,
319 if (strcmp(bname, name) != 0)
330 size = archive_entry_size(entry);
333 if ((buff = malloc(size)) == NULL)
334 bsdar_errc(bsdar, EX_SOFTWARE, errno,
336 if (archive_read_data(a, buff, size) != (ssize_t)size) {
337 bsdar_warnc(bsdar, 0, "%s",
338 archive_error_string(a));
345 obj = malloc(sizeof(struct ar_obj));
347 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
349 if ((obj->name = strdup(name)) == NULL)
350 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
352 obj->uid = archive_entry_uid(entry);
353 obj->gid = archive_entry_gid(entry);
354 obj->md = archive_entry_mode(entry);
355 obj->mtime = archive_entry_mtime(entry);
360 * Objects from archive have obj->fd set to -1,
361 * for the ease of cleaning up.
364 TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
366 AC(archive_read_close(a));
367 AC(archive_read_free(a));
371 * Determine the constitution of resulting archive.
374 write_archive(struct bsdar *bsdar, char mode)
376 struct ar_obj *nobj, *obj, *obj_temp, *pos;
382 TAILQ_INIT(&bsdar->v_obj);
385 memset(&sb, 0, sizeof(sb));
388 * Test if the specified archive exists, to figure out
389 * whether we are creating one here.
391 if (stat(bsdar->filename, &sb) != 0) {
392 if (errno != ENOENT) {
393 bsdar_warnc(bsdar, 0, "stat %s failed",
398 /* We do not create archive in mode 'd', 'm' and 's'. */
399 if (mode != 'r' && mode != 'q') {
400 bsdar_warnc(bsdar, 0, "%s: no such file",
405 /* Issue a warning if -c is not specified when creating. */
406 if (!(bsdar->options & AR_C))
407 bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename);
412 * First read members from existing archive.
414 read_objs(bsdar, bsdar->filename, 0);
417 * For mode 's', no member will be moved, deleted or replaced.
423 * For mode 'q', we don't need to adjust existing members either.
424 * Also, -a, -b and -i are ignored in this mode. New members are
425 * always inserted at tail.
431 * Mode 'A' adds the contents of another archive to the tail of
432 * current archive. Note that mode 'A' is a special mode for the
433 * ADDLIB command of the ar script mode. Currently there is no
434 * access to this function from the ar command line mode.
438 * Read objects from the target archive of ADDLIB command.
439 * If there are members specified in argv, read those members
440 * only, otherwise the entire archive will be read.
442 read_objs(bsdar, bsdar->addlib, 1);
447 * Try to find the position member specified by user.
449 if (bsdar->options & AR_A || bsdar->options & AR_B) {
450 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
451 if (strcmp(obj->name, bsdar->posarg) == 0) {
458 * If can't find `pos' specified by user,
459 * silently insert objects at tail.
462 bsdar->options &= ~(AR_A | AR_B);
465 for (i = 0; i < bsdar->argc; i++) {
466 av = &bsdar->argv[i];
468 TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
469 if ((bname = basename(*av)) == NULL)
470 bsdar_errc(bsdar, EX_SOFTWARE, errno,
472 if (bsdar->options & AR_TR) {
473 if (strncmp(bname, obj->name, _TRUNCATE_LEN))
476 if (strcmp(bname, obj->name) != 0)
481 * if the new member is not qualified
482 * to replace the old one, skip it.
484 nobj = create_obj_from_file(bsdar, *av,
490 if (bsdar->options & AR_V)
491 (void)fprintf(stdout, "%c - %s\n", mode,
494 TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
495 if (mode == 'd' || mode == 'r')
496 free_obj(bsdar, obj);
499 insert_obj(bsdar, obj, pos);
501 insert_obj(bsdar, nobj, pos);
512 * When operating in mode 'r', directly add those user specified
513 * objects which do not exist in current archive. When operating
514 * in mode 'q', all objects specified in command line args are
515 * appended to the archive, without comparing with existing ones.
517 for (i = 0; i < bsdar->argc; i++) {
518 av = &bsdar->argv[i];
519 if (*av != NULL && (mode == 'r' || mode == 'q')) {
520 nobj = create_obj_from_file(bsdar, *av, 0);
522 insert_obj(bsdar, nobj, pos);
523 if (bsdar->options & AR_V && nobj != NULL)
524 (void)fprintf(stdout, "a - %s\n", *av);
531 write_cleanup(bsdar);
535 * Memory cleaning up.
538 write_cleanup(struct bsdar *bsdar)
540 struct ar_obj *obj, *obj_temp;
542 TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
543 TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
544 free_obj(bsdar, obj);
556 * Fault in the buffer prior to writing as a workaround for poor performance
557 * due to interaction with kernel fs deadlock avoidance code. See the comment
558 * above vn_io_fault_doio() in sys/kern/vfs_vnops.c for details of the issue.
561 prefault_buffer(const char *buf, size_t s)
563 volatile const char *p;
568 page_size = sysconf(_SC_PAGESIZE);
569 for (p = buf; p < buf + s; p += page_size)
572 * Ensure we touch the last page as well, in case the buffer is not
575 *(volatile const char *)(buf + s - 1);
579 * Wrapper for archive_write_data().
582 write_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s)
586 prefault_buffer(buf, s);
588 written = archive_write_data(a, buf, s);
590 bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s",
591 archive_error_string(a));
592 buf = (const char *)buf + written;
598 * Write the resulting archive members.
601 write_objs(struct bsdar *bsdar)
605 struct archive_entry *entry;
606 size_t s_sz; /* size of archive symbol table. */
607 size_t pm_sz; /* size of pseudo members */
610 if (elf_version(EV_CURRENT) == EV_NONE)
611 bsdar_errc(bsdar, EX_SOFTWARE, 0,
612 "ELF library initialization failed: %s", elf_errmsg(-1));
616 /* Create archive symbol table and archive string table, if need. */
617 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
618 if (!(bsdar->options & AR_SS) && obj->maddr != NULL)
619 create_symtab_entry(bsdar, obj->maddr, obj->size);
620 if (strlen(obj->name) > _MAXNAMELEN_SVR4)
621 add_to_ar_str_table(bsdar, obj->name);
622 bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2;
626 * Pad the symbol name string table. It is treated specially because
627 * symbol name table should be padded by a '\0', not the common '\n'
628 * for other members. The size of sn table includes the pad bit.
630 if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0)
631 bsdar->s_sn[bsdar->s_sn_sz++] = '\0';
634 * Archive string table is padded by a "\n" as the normal members.
635 * The difference is that the size of archive string table counts
636 * in the pad bit, while normal members' size fileds do not.
638 if (bsdar->as != NULL && bsdar->as_sz % 2 != 0)
639 bsdar->as[bsdar->as_sz++] = '\n';
642 * If there is a symbol table, calculate the size of pseudo members,
643 * convert previously stored relative offsets to absolute ones, and
644 * then make them Big Endian.
646 * absolute_offset = htobe32(relative_offset + size_of_pseudo_members)
649 if (bsdar->s_cnt != 0) {
650 s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz;
651 pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz);
652 if (bsdar->as != NULL)
653 pm_sz += _ARHDR_LEN + bsdar->as_sz;
654 for (i = 0; (size_t)i < bsdar->s_cnt; i++)
655 *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) +
659 if ((a = archive_write_new()) == NULL)
660 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed");
662 archive_write_set_format_ar_svr4(a);
664 AC(archive_write_open_filename(a, bsdar->filename));
667 * write the archive symbol table, if there is one.
668 * If options -s is explicitly specified or we are invoked
669 * as ranlib, write the symbol table even if it is empty.
671 if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) ||
672 bsdar->options & AR_S) {
673 entry = archive_entry_new();
674 archive_entry_copy_pathname(entry, "/");
675 if ((bsdar->options & AR_D) == 0)
676 archive_entry_set_mtime(entry, time(NULL), 0);
677 archive_entry_set_size(entry, (bsdar->s_cnt + 1) *
678 sizeof(uint32_t) + bsdar->s_sn_sz);
679 AC(archive_write_header(a, entry));
680 nr = htobe32(bsdar->s_cnt);
681 write_data(bsdar, a, &nr, sizeof(uint32_t));
682 write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) *
684 write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz);
685 archive_entry_free(entry);
688 /* write the archive string table, if any. */
689 if (bsdar->as != NULL) {
690 entry = archive_entry_new();
691 archive_entry_copy_pathname(entry, "//");
692 archive_entry_set_size(entry, bsdar->as_sz);
693 AC(archive_write_header(a, entry));
694 write_data(bsdar, a, bsdar->as, bsdar->as_sz);
695 archive_entry_free(entry);
698 /* write normal members. */
699 TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
700 entry = archive_entry_new();
701 archive_entry_copy_pathname(entry, obj->name);
702 archive_entry_set_uid(entry, obj->uid);
703 archive_entry_set_gid(entry, obj->gid);
704 archive_entry_set_mode(entry, obj->md);
705 archive_entry_set_size(entry, obj->size);
706 archive_entry_set_mtime(entry, obj->mtime, 0);
707 archive_entry_set_dev(entry, obj->dev);
708 archive_entry_set_ino(entry, obj->ino);
709 archive_entry_set_filetype(entry, AE_IFREG);
710 AC(archive_write_header(a, entry));
711 write_data(bsdar, a, obj->maddr, obj->size);
712 archive_entry_free(entry);
715 AC(archive_write_close(a));
716 AC(archive_write_free(a));
720 * Extract global symbols from ELF binary members.
723 create_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size)
732 int elferr, tabndx, len, i;
734 if ((e = elf_memory(maddr, size)) == NULL) {
735 bsdar_warnc(bsdar, 0, "elf_memory() failed: %s",
739 if (elf_kind(e) != ELF_K_ELF) {
740 /* Silently ignore non-elf member. */
744 if (elf_getshstrndx(e, &shstrndx) == 0) {
745 bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s",
753 while ((scn = elf_nextscn(e, scn)) != NULL) {
754 if (gelf_getshdr(scn, &shdr) != &shdr) {
755 bsdar_warnc(bsdar, 0,
756 "elf_getshdr failed: %s", elf_errmsg(-1));
759 if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) {
760 bsdar_warnc(bsdar, 0,
761 "elf_strptr failed: %s", elf_errmsg(-1));
764 if (strcmp(name, ".strtab") == 0) {
765 tabndx = elf_ndxscn(scn);
769 elferr = elf_errno();
771 bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s",
774 bsdar_warnc(bsdar, 0, "can't find .strtab section");
780 while ((scn = elf_nextscn(e, scn)) != NULL) {
781 if (gelf_getshdr(scn, &shdr) != &shdr) {
782 bsdar_warnc(bsdar, EX_SOFTWARE, 0,
783 "elf_getshdr failed: %s", elf_errmsg(-1));
786 if (shdr.sh_type != SHT_SYMTAB)
791 while (n < shdr.sh_size &&
792 (data = elf_getdata(scn, data)) != NULL) {
793 len = data->d_size / shdr.sh_entsize;
794 for (i = 0; i < len; i++) {
795 if (gelf_getsym(data, i, &sym) != &sym) {
796 bsdar_warnc(bsdar, EX_SOFTWARE, 0,
797 "gelf_getsym failed: %s",
802 /* keep only global or weak symbols */
803 if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL &&
804 GELF_ST_BIND(sym.st_info) != STB_WEAK)
807 /* keep only defined symbols */
808 if (sym.st_shndx == SHN_UNDEF)
811 if ((name = elf_strptr(e, tabndx,
812 sym.st_name)) == NULL) {
813 bsdar_warnc(bsdar, EX_SOFTWARE, 0,
814 "elf_strptr failed: %s",
819 add_to_ar_sym_table(bsdar, name);
823 elferr = elf_errno();
825 bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s",
832 * Append to the archive string table buffer.
835 add_to_ar_str_table(struct bsdar *bsdar, const char *name)
838 if (bsdar->as == NULL) {
839 bsdar->as_cap = _INIT_AS_CAP;
841 if ((bsdar->as = malloc(bsdar->as_cap)) == NULL)
842 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
846 * The space required for holding one member name in as table includes:
847 * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding).
849 while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) {
851 bsdar->as = realloc(bsdar->as, bsdar->as_cap);
852 if (bsdar->as == NULL)
853 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
855 strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name));
856 bsdar->as_sz += strlen(name);
857 bsdar->as[bsdar->as_sz++] = '/';
858 bsdar->as[bsdar->as_sz++] = '\n';
862 * Append to the archive symbol table buffer.
865 add_to_ar_sym_table(struct bsdar *bsdar, const char *name)
868 if (bsdar->s_so == NULL) {
869 if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) ==
871 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
872 bsdar->s_so_cap = _INIT_SYMOFF_CAP;
876 if (bsdar->s_sn == NULL) {
877 if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL)
878 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
879 bsdar->s_sn_cap = _INIT_SYMNAME_CAP;
883 if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) {
884 bsdar->s_so_cap *= 2;
885 bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap);
886 if (bsdar->s_so == NULL)
887 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
889 bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off;
893 * The space required for holding one symbol name in sn table includes:
894 * strlen(name) + (1 for '\n') + (possibly 1 for padding).
896 while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) {
897 bsdar->s_sn_cap *= 2;
898 bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap);
899 if (bsdar->s_sn == NULL)
900 bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
902 strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name));
903 bsdar->s_sn_sz += strlen(name);
904 bsdar->s_sn[bsdar->s_sn_sz++] = '\0';