/usr.bin/ar/write.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 874 lines · 601 code · 102 blank · 171 comment · 217 complexity · 374825b7b557d8ae729eef86f65999bd MD5 · raw file
- /*-
- * Copyright (c) 2007 Kai Wang
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer
- * in this position and unchanged.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include <sys/endian.h>
- #include <sys/mman.h>
- #include <sys/queue.h>
- #include <sys/stat.h>
- #include <archive.h>
- #include <archive_entry.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <gelf.h>
- #include <libgen.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sysexits.h>
- #include "ar.h"
- #define _ARMAG_LEN 8 /* length of ar magic string */
- #define _ARHDR_LEN 60 /* length of ar header */
- #define _INIT_AS_CAP 128 /* initial archive string table size */
- #define _INIT_SYMOFF_CAP (256*(sizeof(uint32_t))) /* initial so table size */
- #define _INIT_SYMNAME_CAP 1024 /* initial sn table size */
- #define _MAXNAMELEN_SVR4 15 /* max member name length in svr4 variant */
- #define _TRUNCATE_LEN 15 /* number of bytes to keep for member name */
- static void add_to_ar_str_table(struct bsdar *bsdar, const char *name);
- static void add_to_ar_sym_table(struct bsdar *bsdar, const char *name);
- static struct ar_obj *create_obj_from_file(struct bsdar *bsdar,
- const char *name, time_t mtime);
- static void create_symtab_entry(struct bsdar *bsdar, void *maddr,
- size_t size);
- static void free_obj(struct bsdar *bsdar, struct ar_obj *obj);
- static void insert_obj(struct bsdar *bsdar, struct ar_obj *obj,
- struct ar_obj *pos);
- static void read_objs(struct bsdar *bsdar, const char *archive,
- int checkargv);
- static void write_archive(struct bsdar *bsdar, char mode);
- static void write_cleanup(struct bsdar *bsdar);
- static void write_data(struct bsdar *bsdar, struct archive *a,
- const void *buf, size_t s);
- static void write_objs(struct bsdar *bsdar);
- void
- ar_mode_d(struct bsdar *bsdar)
- {
- write_archive(bsdar, 'd');
- }
- void
- ar_mode_m(struct bsdar *bsdar)
- {
- write_archive(bsdar, 'm');
- }
- void
- ar_mode_q(struct bsdar *bsdar)
- {
- write_archive(bsdar, 'q');
- }
- void
- ar_mode_r(struct bsdar *bsdar)
- {
- write_archive(bsdar, 'r');
- }
- void
- ar_mode_s(struct bsdar *bsdar)
- {
- write_archive(bsdar, 's');
- }
- void
- ar_mode_A(struct bsdar *bsdar)
- {
- write_archive(bsdar, 'A');
- }
- /*
- * Create object from file, return created obj upon success, or NULL
- * when an error occurs or the member is not newer than existing
- * one while -u is specified.
- */
- static struct ar_obj *
- create_obj_from_file(struct bsdar *bsdar, const char *name, time_t mtime)
- {
- struct ar_obj *obj;
- struct stat sb;
- const char *bname;
- if (name == NULL)
- return (NULL);
- obj = malloc(sizeof(struct ar_obj));
- if (obj == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- if ((obj->fd = open(name, O_RDONLY, 0)) < 0) {
- bsdar_warnc(bsdar, errno, "can't open file: %s", name);
- free(obj);
- return (NULL);
- }
- if ((bname = basename(name)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "basename failed");
- if (bsdar->options & AR_TR && strlen(bname) > _TRUNCATE_LEN) {
- if ((obj->name = malloc(_TRUNCATE_LEN + 1)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- (void)strncpy(obj->name, bname, _TRUNCATE_LEN);
- obj->name[_TRUNCATE_LEN] = '\0';
- } else
- if ((obj->name = strdup(bname)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
- if (fstat(obj->fd, &sb) < 0) {
- bsdar_warnc(bsdar, errno, "can't fstat file: %s", obj->name);
- goto giveup;
- }
- if (!S_ISREG(sb.st_mode)) {
- bsdar_warnc(bsdar, 0, "%s is not an ordinary file", obj->name);
- goto giveup;
- }
- /*
- * When option '-u' is specified and member is not newer than the
- * existing one, the replace will not happen. While if mtime == 0,
- * which indicates that this is to "replace a none exist member",
- * the replace will proceed regardless of '-u'.
- */
- if (mtime != 0 && bsdar->options & AR_U && sb.st_mtime <= mtime)
- goto giveup;
- /*
- * When option '-D' is specified, mtime and UID / GID from the file
- * will be replaced with 0, and file mode with 644. This ensures that
- * checksums will match for two archives containing the exact same
- * files.
- */
- if (bsdar->options & AR_D) {
- obj->uid = 0;
- obj->gid = 0;
- obj->mtime = 0;
- obj->md = S_IFREG | 0644;
- } else {
- obj->uid = sb.st_uid;
- obj->gid = sb.st_gid;
- obj->mtime = sb.st_mtime;
- obj->md = sb.st_mode;
- }
- obj->size = sb.st_size;
- obj->dev = sb.st_dev;
- obj->ino = sb.st_ino;
- if (obj->size == 0) {
- obj->maddr = NULL;
- return (obj);
- }
- if ((obj->maddr = mmap(NULL, obj->size, PROT_READ,
- MAP_PRIVATE, obj->fd, (off_t)0)) == MAP_FAILED) {
- bsdar_warnc(bsdar, errno, "can't mmap file: %s", obj->name);
- goto giveup;
- }
- if (close(obj->fd) < 0)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
- obj->name);
- return (obj);
- giveup:
- if (close(obj->fd) < 0)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "close failed: %s",
- obj->name);
- free(obj->name);
- free(obj);
- return (NULL);
- }
- /*
- * Free object itself and its associated allocations.
- */
- static void
- free_obj(struct bsdar *bsdar, struct ar_obj *obj)
- {
- if (obj->fd == -1)
- free(obj->maddr);
- else
- if (obj->maddr != NULL && munmap(obj->maddr, obj->size))
- bsdar_warnc(bsdar, errno,
- "can't munmap file: %s", obj->name);
- free(obj->name);
- free(obj);
- }
- /*
- * Insert obj to the tail, or before/after the pos obj.
- */
- static void
- insert_obj(struct bsdar *bsdar, struct ar_obj *obj, struct ar_obj *pos)
- {
- if (obj == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, 0, "try to insert a null obj");
- if (pos == NULL || obj == pos)
- /*
- * If the object to move happens to be the position obj,
- * or if there is not a pos obj, move it to tail.
- */
- goto tail;
- if (bsdar->options & AR_B) {
- TAILQ_INSERT_BEFORE(pos, obj, objs);
- return;
- }
- if (bsdar->options & AR_A) {
- TAILQ_INSERT_AFTER(&bsdar->v_obj, pos, obj, objs);
- return;
- }
- tail:
- TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
- }
- /*
- * Read objects from archive into v_obj list. Note that checkargv is
- * set when read_objs is used to read objects from the target of
- * ADDLIB command (ar script mode), in this case argv array possibly
- * specifies the members ADDLIB want.
- */
- static void
- read_objs(struct bsdar *bsdar, const char *archive, int checkargv)
- {
- struct archive *a;
- struct archive_entry *entry;
- struct ar_obj *obj;
- const char *name;
- const char *bname;
- char *buff;
- char **av;
- size_t size;
- int i, r, find;
- if ((a = archive_read_new()) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed");
- archive_read_support_compression_none(a);
- archive_read_support_format_ar(a);
- AC(archive_read_open_filename(a, archive, DEF_BLKSZ));
- for (;;) {
- r = archive_read_next_header(a, &entry);
- if (r == ARCHIVE_FATAL)
- bsdar_errc(bsdar, EX_DATAERR, 0, "%s",
- archive_error_string(a));
- if (r == ARCHIVE_EOF)
- break;
- if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY)
- bsdar_warnc(bsdar, 0, "%s", archive_error_string(a));
- if (r == ARCHIVE_RETRY) {
- bsdar_warnc(bsdar, 0, "Retrying...");
- continue;
- }
- name = archive_entry_pathname(entry);
- /*
- * skip pseudo members.
- */
- if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0)
- continue;
- /*
- * If checkargv is set, only read those members specified
- * in argv.
- */
- if (checkargv && bsdar->argc > 0) {
- find = 0;
- for(i = 0; i < bsdar->argc; i++) {
- av = &bsdar->argv[i];
- if (*av == NULL)
- continue;
- if ((bname = basename(*av)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno,
- "basename failed");
- if (strcmp(bname, name) != 0)
- continue;
- *av = NULL;
- find = 1;
- break;
- }
- if (!find)
- continue;
- }
- size = archive_entry_size(entry);
- if (size > 0) {
- if ((buff = malloc(size)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno,
- "malloc failed");
- if (archive_read_data(a, buff, size) != (ssize_t)size) {
- bsdar_warnc(bsdar, 0, "%s",
- archive_error_string(a));
- free(buff);
- continue;
- }
- } else
- buff = NULL;
- obj = malloc(sizeof(struct ar_obj));
- if (obj == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- obj->maddr = buff;
- if ((obj->name = strdup(name)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed");
- obj->size = size;
- obj->uid = archive_entry_uid(entry);
- obj->gid = archive_entry_gid(entry);
- obj->md = archive_entry_mode(entry);
- obj->mtime = archive_entry_mtime(entry);
- obj->dev = 0;
- obj->ino = 0;
- /*
- * Objects from archive have obj->fd set to -1,
- * for the ease of cleaning up.
- */
- obj->fd = -1;
- TAILQ_INSERT_TAIL(&bsdar->v_obj, obj, objs);
- }
- AC(archive_read_close(a));
- AC(archive_read_finish(a));
- }
- /*
- * Determine the constitution of resulting archive.
- */
- static void
- write_archive(struct bsdar *bsdar, char mode)
- {
- struct ar_obj *nobj, *obj, *obj_temp, *pos;
- struct stat sb;
- const char *bname;
- char **av;
- int i;
- TAILQ_INIT(&bsdar->v_obj);
- nobj = NULL;
- pos = NULL;
- memset(&sb, 0, sizeof(sb));
- /*
- * Test if the specified archive exists, to figure out
- * whether we are creating one here.
- */
- if (stat(bsdar->filename, &sb) != 0) {
- if (errno != ENOENT) {
- bsdar_warnc(bsdar, 0, "stat %s failed",
- bsdar->filename);
- return;
- }
- /* We do not create archive in mode 'd', 'm' and 's'. */
- if (mode != 'r' && mode != 'q') {
- bsdar_warnc(bsdar, 0, "%s: no such file",
- bsdar->filename);
- return;
- }
- /* Issue a warning if -c is not specified when creating. */
- if (!(bsdar->options & AR_C))
- bsdar_warnc(bsdar, 0, "creating %s", bsdar->filename);
- goto new_archive;
- }
- /*
- * First read members from existing archive.
- */
- read_objs(bsdar, bsdar->filename, 0);
- /*
- * For mode 's', no member will be moved, deleted or replaced.
- */
- if (mode == 's')
- goto write_objs;
- /*
- * For mode 'q', we don't need to adjust existing members either.
- * Also, -a, -b and -i are ignored in this mode. New members are
- * always inserted at tail.
- */
- if (mode == 'q')
- goto new_archive;
- /*
- * Mode 'A' adds the contents of another archive to the tail of
- * current archive. Note that mode 'A' is a special mode for the
- * ADDLIB command of the ar script mode. Currently there is no
- * access to this function from the ar command line mode.
- */
- if (mode == 'A') {
- /*
- * Read objects from the target archive of ADDLIB command.
- * If there are members specified in argv, read those members
- * only, otherwise the entire archive will be read.
- */
- read_objs(bsdar, bsdar->addlib, 1);
- goto write_objs;
- }
- /*
- * Try to find the position member specified by user.
- */
- if (bsdar->options & AR_A || bsdar->options & AR_B) {
- TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
- if (strcmp(obj->name, bsdar->posarg) == 0) {
- pos = obj;
- break;
- }
- }
- /*
- * If can't find `pos' specified by user,
- * silently insert objects at tail.
- */
- if (pos == NULL)
- bsdar->options &= ~(AR_A | AR_B);
- }
- for (i = 0; i < bsdar->argc; i++) {
- av = &bsdar->argv[i];
- TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
- if ((bname = basename(*av)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno,
- "basename failed");
- if (bsdar->options & AR_TR) {
- if (strncmp(bname, obj->name, _TRUNCATE_LEN))
- continue;
- } else
- if (strcmp(bname, obj->name) != 0)
- continue;
- if (mode == 'r') {
- /*
- * if the new member is not qualified
- * to replace the old one, skip it.
- */
- nobj = create_obj_from_file(bsdar, *av,
- obj->mtime);
- if (nobj == NULL)
- goto skip_obj;
- }
- if (bsdar->options & AR_V)
- (void)fprintf(stdout, "%c - %s\n", mode,
- *av);
- TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
- if (mode == 'd' || mode == 'r')
- free_obj(bsdar, obj);
- if (mode == 'm')
- insert_obj(bsdar, obj, pos);
- if (mode == 'r')
- insert_obj(bsdar, nobj, pos);
- skip_obj:
- *av = NULL;
- break;
- }
- }
- new_archive:
- /*
- * When operating in mode 'r', directly add those user specified
- * objects which do not exist in current archive. When operating
- * in mode 'q', all objects specified in command line args are
- * appended to the archive, without comparing with existing ones.
- */
- for (i = 0; i < bsdar->argc; i++) {
- av = &bsdar->argv[i];
- if (*av != NULL && (mode == 'r' || mode == 'q')) {
- nobj = create_obj_from_file(bsdar, *av, 0);
- if (nobj != NULL)
- insert_obj(bsdar, nobj, pos);
- if (bsdar->options & AR_V && nobj != NULL)
- (void)fprintf(stdout, "a - %s\n", *av);
- *av = NULL;
- }
- }
- write_objs:
- write_objs(bsdar);
- write_cleanup(bsdar);
- }
- /*
- * Memory cleaning up.
- */
- static void
- write_cleanup(struct bsdar *bsdar)
- {
- struct ar_obj *obj, *obj_temp;
- TAILQ_FOREACH_SAFE(obj, &bsdar->v_obj, objs, obj_temp) {
- TAILQ_REMOVE(&bsdar->v_obj, obj, objs);
- free_obj(bsdar, obj);
- }
- free(bsdar->as);
- free(bsdar->s_so);
- free(bsdar->s_sn);
- bsdar->as = NULL;
- bsdar->s_so = NULL;
- bsdar->s_sn = NULL;
- }
- /*
- * Wrapper for archive_write_data().
- */
- static void
- write_data(struct bsdar *bsdar, struct archive *a, const void *buf, size_t s)
- {
- if (archive_write_data(a, buf, s) != (ssize_t)s)
- bsdar_errc(bsdar, EX_SOFTWARE, 0, "%s",
- archive_error_string(a));
- }
- /*
- * Write the resulting archive members.
- */
- static void
- write_objs(struct bsdar *bsdar)
- {
- struct ar_obj *obj;
- struct archive *a;
- struct archive_entry *entry;
- size_t s_sz; /* size of archive symbol table. */
- size_t pm_sz; /* size of pseudo members */
- int i, nr;
- if (elf_version(EV_CURRENT) == EV_NONE)
- bsdar_errc(bsdar, EX_SOFTWARE, 0,
- "ELF library initialization failed: %s", elf_errmsg(-1));
- bsdar->rela_off = 0;
- /* Create archive symbol table and archive string table, if need. */
- TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
- if (!(bsdar->options & AR_SS) && obj->maddr != NULL)
- create_symtab_entry(bsdar, obj->maddr, obj->size);
- if (strlen(obj->name) > _MAXNAMELEN_SVR4)
- add_to_ar_str_table(bsdar, obj->name);
- bsdar->rela_off += _ARHDR_LEN + obj->size + obj->size % 2;
- }
- /*
- * Pad the symbol name string table. It is treated specially because
- * symbol name table should be padded by a '\0', not the common '\n'
- * for other members. The size of sn table includes the pad bit.
- */
- if (bsdar->s_cnt != 0 && bsdar->s_sn_sz % 2 != 0)
- bsdar->s_sn[bsdar->s_sn_sz++] = '\0';
- /*
- * Archive string table is padded by a "\n" as the normal members.
- * The difference is that the size of archive string table counts
- * in the pad bit, while normal members' size fileds do not.
- */
- if (bsdar->as != NULL && bsdar->as_sz % 2 != 0)
- bsdar->as[bsdar->as_sz++] = '\n';
- /*
- * If there is a symbol table, calculate the size of pseudo members,
- * convert previously stored relative offsets to absolute ones, and
- * then make them Big Endian.
- *
- * absolute_offset = htobe32(relative_offset + size_of_pseudo_members)
- */
- if (bsdar->s_cnt != 0) {
- s_sz = (bsdar->s_cnt + 1) * sizeof(uint32_t) + bsdar->s_sn_sz;
- pm_sz = _ARMAG_LEN + (_ARHDR_LEN + s_sz);
- if (bsdar->as != NULL)
- pm_sz += _ARHDR_LEN + bsdar->as_sz;
- for (i = 0; (size_t)i < bsdar->s_cnt; i++)
- *(bsdar->s_so + i) = htobe32(*(bsdar->s_so + i) +
- pm_sz);
- }
- if ((a = archive_write_new()) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_write_new failed");
- archive_write_set_format_ar_svr4(a);
- archive_write_set_compression_none(a);
- AC(archive_write_open_filename(a, bsdar->filename));
- /*
- * write the archive symbol table, if there is one.
- * If options -s is explicitly specified or we are invoked
- * as ranlib, write the symbol table even if it is empty.
- */
- if ((bsdar->s_cnt != 0 && !(bsdar->options & AR_SS)) ||
- bsdar->options & AR_S) {
- entry = archive_entry_new();
- archive_entry_copy_pathname(entry, "/");
- if ((bsdar->options & AR_D) == 0)
- archive_entry_set_mtime(entry, time(NULL), 0);
- archive_entry_set_size(entry, (bsdar->s_cnt + 1) *
- sizeof(uint32_t) + bsdar->s_sn_sz);
- AC(archive_write_header(a, entry));
- nr = htobe32(bsdar->s_cnt);
- write_data(bsdar, a, &nr, sizeof(uint32_t));
- write_data(bsdar, a, bsdar->s_so, sizeof(uint32_t) *
- bsdar->s_cnt);
- write_data(bsdar, a, bsdar->s_sn, bsdar->s_sn_sz);
- archive_entry_free(entry);
- }
- /* write the archive string table, if any. */
- if (bsdar->as != NULL) {
- entry = archive_entry_new();
- archive_entry_copy_pathname(entry, "//");
- archive_entry_set_size(entry, bsdar->as_sz);
- AC(archive_write_header(a, entry));
- write_data(bsdar, a, bsdar->as, bsdar->as_sz);
- archive_entry_free(entry);
- }
- /* write normal members. */
- TAILQ_FOREACH(obj, &bsdar->v_obj, objs) {
- entry = archive_entry_new();
- archive_entry_copy_pathname(entry, obj->name);
- archive_entry_set_uid(entry, obj->uid);
- archive_entry_set_gid(entry, obj->gid);
- archive_entry_set_mode(entry, obj->md);
- archive_entry_set_size(entry, obj->size);
- archive_entry_set_mtime(entry, obj->mtime, 0);
- archive_entry_set_dev(entry, obj->dev);
- archive_entry_set_ino(entry, obj->ino);
- archive_entry_set_filetype(entry, AE_IFREG);
- AC(archive_write_header(a, entry));
- write_data(bsdar, a, obj->maddr, obj->size);
- archive_entry_free(entry);
- }
- AC(archive_write_close(a));
- AC(archive_write_finish(a));
- }
- /*
- * Extract global symbols from ELF binary members.
- */
- static void
- create_symtab_entry(struct bsdar *bsdar, void *maddr, size_t size)
- {
- Elf *e;
- Elf_Scn *scn;
- GElf_Shdr shdr;
- GElf_Sym sym;
- Elf_Data *data;
- char *name;
- size_t n, shstrndx;
- int elferr, tabndx, len, i;
- if ((e = elf_memory(maddr, size)) == NULL) {
- bsdar_warnc(bsdar, 0, "elf_memory() failed: %s",
- elf_errmsg(-1));
- return;
- }
- if (elf_kind(e) != ELF_K_ELF) {
- /* Silently ignore non-elf member. */
- elf_end(e);
- return;
- }
- if (elf_getshstrndx(e, &shstrndx) == 0) {
- bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_getshstrndx failed: %s",
- elf_errmsg(-1));
- elf_end(e);
- return;
- }
- tabndx = -1;
- scn = NULL;
- while ((scn = elf_nextscn(e, scn)) != NULL) {
- if (gelf_getshdr(scn, &shdr) != &shdr) {
- bsdar_warnc(bsdar, 0,
- "elf_getshdr failed: %s", elf_errmsg(-1));
- continue;
- }
- if ((name = elf_strptr(e, shstrndx, shdr.sh_name)) == NULL) {
- bsdar_warnc(bsdar, 0,
- "elf_strptr failed: %s", elf_errmsg(-1));
- continue;
- }
- if (strcmp(name, ".strtab") == 0) {
- tabndx = elf_ndxscn(scn);
- break;
- }
- }
- elferr = elf_errno();
- if (elferr != 0)
- bsdar_warnc(bsdar, 0, "elf_nextscn failed: %s",
- elf_errmsg(elferr));
- if (tabndx == -1) {
- bsdar_warnc(bsdar, 0, "can't find .strtab section");
- elf_end(e);
- return;
- }
- scn = NULL;
- while ((scn = elf_nextscn(e, scn)) != NULL) {
- if (gelf_getshdr(scn, &shdr) != &shdr) {
- bsdar_warnc(bsdar, EX_SOFTWARE, 0,
- "elf_getshdr failed: %s", elf_errmsg(-1));
- continue;
- }
- if (shdr.sh_type != SHT_SYMTAB)
- continue;
- data = NULL;
- n = 0;
- while (n < shdr.sh_size &&
- (data = elf_getdata(scn, data)) != NULL) {
- len = data->d_size / shdr.sh_entsize;
- for (i = 0; i < len; i++) {
- if (gelf_getsym(data, i, &sym) != &sym) {
- bsdar_warnc(bsdar, EX_SOFTWARE, 0,
- "gelf_getsym failed: %s",
- elf_errmsg(-1));
- continue;
- }
- /* keep only global or weak symbols */
- if (GELF_ST_BIND(sym.st_info) != STB_GLOBAL &&
- GELF_ST_BIND(sym.st_info) != STB_WEAK)
- continue;
- /* keep only defined symbols */
- if (sym.st_shndx == SHN_UNDEF)
- continue;
- if ((name = elf_strptr(e, tabndx,
- sym.st_name)) == NULL) {
- bsdar_warnc(bsdar, EX_SOFTWARE, 0,
- "elf_strptr failed: %s",
- elf_errmsg(-1));
- continue;
- }
- add_to_ar_sym_table(bsdar, name);
- }
- }
- }
- elferr = elf_errno();
- if (elferr != 0)
- bsdar_warnc(bsdar, EX_SOFTWARE, 0, "elf_nextscn failed: %s",
- elf_errmsg(elferr));
- elf_end(e);
- }
- /*
- * Append to the archive string table buffer.
- */
- static void
- add_to_ar_str_table(struct bsdar *bsdar, const char *name)
- {
- if (bsdar->as == NULL) {
- bsdar->as_cap = _INIT_AS_CAP;
- bsdar->as_sz = 0;
- if ((bsdar->as = malloc(bsdar->as_cap)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- }
- /*
- * The space required for holding one member name in as table includes:
- * strlen(name) + (1 for '/') + (1 for '\n') + (possibly 1 for padding).
- */
- while (bsdar->as_sz + strlen(name) + 3 > bsdar->as_cap) {
- bsdar->as_cap *= 2;
- bsdar->as = realloc(bsdar->as, bsdar->as_cap);
- if (bsdar->as == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
- }
- strncpy(&bsdar->as[bsdar->as_sz], name, strlen(name));
- bsdar->as_sz += strlen(name);
- bsdar->as[bsdar->as_sz++] = '/';
- bsdar->as[bsdar->as_sz++] = '\n';
- }
- /*
- * Append to the archive symbol table buffer.
- */
- static void
- add_to_ar_sym_table(struct bsdar *bsdar, const char *name)
- {
- if (bsdar->s_so == NULL) {
- if ((bsdar->s_so = malloc(_INIT_SYMOFF_CAP)) ==
- NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- bsdar->s_so_cap = _INIT_SYMOFF_CAP;
- bsdar->s_cnt = 0;
- }
- if (bsdar->s_sn == NULL) {
- if ((bsdar->s_sn = malloc(_INIT_SYMNAME_CAP)) == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed");
- bsdar->s_sn_cap = _INIT_SYMNAME_CAP;
- bsdar->s_sn_sz = 0;
- }
- if (bsdar->s_cnt * sizeof(uint32_t) >= bsdar->s_so_cap) {
- bsdar->s_so_cap *= 2;
- bsdar->s_so = realloc(bsdar->s_so, bsdar->s_so_cap);
- if (bsdar->s_so == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
- }
- bsdar->s_so[bsdar->s_cnt] = bsdar->rela_off;
- bsdar->s_cnt++;
- /*
- * The space required for holding one symbol name in sn table includes:
- * strlen(name) + (1 for '\n') + (possibly 1 for padding).
- */
- while (bsdar->s_sn_sz + strlen(name) + 2 > bsdar->s_sn_cap) {
- bsdar->s_sn_cap *= 2;
- bsdar->s_sn = realloc(bsdar->s_sn, bsdar->s_sn_cap);
- if (bsdar->s_sn == NULL)
- bsdar_errc(bsdar, EX_SOFTWARE, errno, "realloc failed");
- }
- strncpy(&bsdar->s_sn[bsdar->s_sn_sz], name, strlen(name));
- bsdar->s_sn_sz += strlen(name);
- bsdar->s_sn[bsdar->s_sn_sz++] = '\0';
- }