/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.219 Revision 1.229
1/* 1/*
2 * Copyright 2003-2007 Gentoo Foundation 2 * Copyright 2003-2007 Gentoo Foundation
3 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.219 2010/12/06 20:43:48 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $
5 * 5 *
6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2007 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10static const char *rcsid = "$Id: scanelf.c,v 1.219 2010/12/06 20:43:48 vapier Exp $"; 10static const char *rcsid = "$Id: scanelf.c,v 1.229 2011/09/27 19:29:19 vapier Exp $";
11const char * const argv0 = "scanelf"; 11const char argv0[] = "scanelf";
12 12
13#include "paxinc.h" 13#include "paxinc.h"
14 14
15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
16 16
17/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist); 18static int file_matches_list(const char *filename, char **matchlist);
19static int scanelf_elfobj(elfobj *elf);
20static int scanelf_elf(const char *filename, int fd, size_t len);
21static int scanelf_archive(const char *filename, int fd, size_t len);
22static int scanelf_file(const char *filename, const struct stat *st_cache);
23static int scanelf_dir(const char *path);
24static void scanelf_ldpath(void);
25static void scanelf_envpath(void);
26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
29static int parseargs(int argc, char *argv[]);
30 19
31/* variables to control behavior */ 20/* variables to control behavior */
32static char match_etypes[126] = ""; 21static char *match_etypes = NULL;
33static char *ldpaths[256]; 22static array_t _ldpaths = array_init_decl, *ldpaths = &_ldpaths;
34static char scan_ldpath = 0; 23static char scan_ldpath = 0;
35static char scan_envpath = 0; 24static char scan_envpath = 0;
36static char scan_symlink = 1; 25static char scan_symlink = 1;
37static char scan_archives = 0; 26static char scan_archives = 0;
38static char dir_recurse = 0; 27static char dir_recurse = 0;
56static char be_verbose = 0; 45static char be_verbose = 0;
57static char be_wewy_wewy_quiet = 0; 46static char be_wewy_wewy_quiet = 0;
58static char be_semi_verbose = 0; 47static char be_semi_verbose = 0;
59static char *find_sym = NULL; 48static char *find_sym = NULL;
60static char *find_lib = NULL; 49static char *find_lib = NULL;
50static array_t _find_lib_arr = array_init_decl, *find_lib_arr = &_find_lib_arr;
61static char *find_section = NULL; 51static char *find_section = NULL;
52static array_t _find_section_arr = array_init_decl, *find_section_arr = &_find_section_arr;
62static char *out_format = NULL; 53static char *out_format = NULL;
63static char *search_path = NULL; 54static char *search_path = NULL;
64static char fix_elf = 0; 55static char fix_elf = 0;
65static char g_match = 0; 56static char g_match = 0;
66static char use_ldcache = 0; 57static char use_ldcache = 0;
67 58
68static char **qa_textrels = NULL; 59static char **qa_textrels = NULL;
69static char **qa_execstack = NULL; 60static char **qa_execstack = NULL;
70static char **qa_wx_load = NULL; 61static char **qa_wx_load = NULL;
62static char *root;
71 63
72static int match_bits = 0; 64static int match_bits = 0;
73static unsigned int match_perms = 0; 65static unsigned int match_perms = 0;
74static void *ldcache = NULL; 66static void *ldcache = NULL;
75static size_t ldcache_size = 0; 67static size_t ldcache_size = 0;
503 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 495 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
504 496
505 return NULL; 497 return NULL;
506} 498}
507 499
508static void rpath_security_checks(elfobj *, char *, const char *);
509static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type) 500static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
510{ 501{
511 struct stat st; 502 struct stat st;
512 switch (*item) { 503 switch (*item) {
513 case '/': break; 504 case '/': break;
529 break; 520 break;
530 } 521 }
531} 522}
532static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 523static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
533{ 524{
534 unsigned long i, s; 525 unsigned long i;
535 char *rpath, *runpath, **r; 526 char *rpath, *runpath, **r;
536 void *strtbl_void; 527 void *strtbl_void;
537 528
538 if (!show_rpath) return; 529 if (!show_rpath) return;
539 530
584 /* scan each path in : delimited list */ \ 575 /* scan each path in : delimited list */ \
585 while (start) { \ 576 while (start) { \
586 rpath_security_checks(elf, start, get_elfdtype(word)); \ 577 rpath_security_checks(elf, start, get_elfdtype(word)); \
587 end = strchr(start, ':'); \ 578 end = strchr(start, ':'); \
588 len = (end ? abs(end - start) : strlen(start)); \ 579 len = (end ? abs(end - start) : strlen(start)); \
589 if (use_ldcache) \ 580 if (use_ldcache) { \
590 for (s = 0; ldpaths[s]; ++s) \ 581 size_t n; \
582 const char *ldpath; \
583 array_for_each(ldpaths, n, ldpath) \
591 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 584 if (!strncmp(ldpath, start, len) && !ldpath[len]) { \
592 *r = end; \ 585 *r = end; \
593 /* corner case ... if RPATH reads "/usr/lib:", we want \ 586 /* corner case ... if RPATH reads "/usr/lib:", we want \
594 * to show ':' rather than '' */ \ 587 * to show ':' rather than '' */ \
595 if (end && end[1] != '\0') \ 588 if (end && end[1] != '\0') \
596 (*r)++; \ 589 (*r)++; \
597 break; \ 590 break; \
598 } \ 591 } \
592 } \
599 if (!*r || !end) \ 593 if (!*r || !end) \
600 break; \ 594 break; \
601 else \ 595 else \
602 start = start + len + 1; \ 596 start = start + len + 1; \
603 } \ 597 } \
688#define FLAG_S390_LIB64 0x0400 682#define FLAG_S390_LIB64 0x0400
689#define FLAG_POWERPC_LIB64 0x0500 683#define FLAG_POWERPC_LIB64 0x0500
690#define FLAG_MIPS64_LIBN32 0x0600 684#define FLAG_MIPS64_LIBN32 0x0600
691#define FLAG_MIPS64_LIBN64 0x0700 685#define FLAG_MIPS64_LIBN64 0x0700
692 686
693static char *lookup_cache_lib(elfobj *, char *);
694
695#if defined(__GLIBC__) || defined(__UCLIBC__) 687#if defined(__GLIBC__) || defined(__UCLIBC__)
696 688
697static char *lookup_cache_lib(elfobj *elf, char *fname) 689static char *lookup_cache_lib(elfobj *elf, char *fname)
698{ 690{
699 int fd; 691 int fd;
774#elif defined(__NetBSD__) 766#elif defined(__NetBSD__)
775static char *lookup_cache_lib(elfobj *elf, char *fname) 767static char *lookup_cache_lib(elfobj *elf, char *fname)
776{ 768{
777 static char buf[__PAX_UTILS_PATH_MAX] = ""; 769 static char buf[__PAX_UTILS_PATH_MAX] = "";
778 static struct stat st; 770 static struct stat st;
779 771 size_t n;
780 char **ldpath; 772 char *ldpath;
781 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) { 773
774 array_for_each(ldpath, n, ldpath) {
782 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf)) 775 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", ldpath, fname) >= sizeof(buf))
783 continue; /* if the pathname is too long, or something went wrong, ignore */ 776 continue; /* if the pathname is too long, or something went wrong, ignore */
784 777
785 if (stat(buf, &st) != 0) 778 if (stat(buf, &st) != 0)
786 continue; /* if the lib doesn't exist in *ldpath, look further */ 779 continue; /* if the lib doesn't exist in *ldpath, look further */
787 780
811 unsigned long i; 804 unsigned long i;
812 char *needed; 805 char *needed;
813 void *strtbl_void; 806 void *strtbl_void;
814 char *p; 807 char *p;
815 808
809 /*
810 * -n -> op==0 -> print all
811 * -N -> op==1 -> print requested
812 */
816 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 813 if ((op == 0 && !show_needed) || (op == 1 && !find_lib))
814 return NULL;
817 815
818 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 816 strtbl_void = elf_findsecbyname(elf, ".dynstr");
819 817
820 if (elf->phdr && strtbl_void) { 818 if (elf->phdr && strtbl_void) {
821#define SHOW_NEEDED(B) \ 819#define SHOW_NEEDED(B) \
823 Elf ## B ## _Dyn *dyn; \ 821 Elf ## B ## _Dyn *dyn; \
824 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 822 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
825 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 823 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
826 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 824 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
827 Elf ## B ## _Off offset; \ 825 Elf ## B ## _Off offset; \
826 size_t matched = 0; \
827 /* Walk all the program headers to find the PT_DYNAMIC */ \
828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 828 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \ 829 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) \
830 continue; \
830 offset = EGET(phdr[i].p_offset); \ 831 offset = EGET(phdr[i].p_offset); \
831 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 832 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) \
833 continue; \
834 /* Walk all the dynamic tags to find NEEDED entries */ \
832 dyn = DYN ## B (elf->vdata + offset); \ 835 dyn = DYN ## B (elf->vdata + offset); \
833 while (EGET(dyn->d_tag) != DT_NULL) { \ 836 while (EGET(dyn->d_tag) != DT_NULL) { \
834 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 837 if (EGET(dyn->d_tag) == DT_NEEDED) { \
835 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 838 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
836 if (offset >= (Elf ## B ## _Off)elf->len) { \ 839 if (offset >= (Elf ## B ## _Off)elf->len) { \
837 ++dyn; \ 840 ++dyn; \
838 continue; \ 841 continue; \
839 } \ 842 } \
840 needed = elf->data + offset; \ 843 needed = elf->data + offset; \
841 if (op == 0) { \ 844 if (op == 0) { \
845 /* -n -> print all entries */ \
842 if (!be_wewy_wewy_quiet) { \ 846 if (!be_wewy_wewy_quiet) { \
843 if (*found_needed) xchrcat(ret, ',', ret_len); \ 847 if (*found_needed) xchrcat(ret, ',', ret_len); \
844 if (use_ldcache) \ 848 if (use_ldcache) \
845 if ((p = lookup_cache_lib(elf, needed)) != NULL) \ 849 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
846 needed = p; \ 850 needed = p; \
847 xstrcat(ret, needed, ret_len); \ 851 xstrcat(ret, needed, ret_len); \
848 } \ 852 } \
849 *found_needed = 1; \ 853 *found_needed = 1; \
850 } else { \ 854 } else { \
851 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \ 855 /* -N -> print matching entries */ \
856 size_t n; \
857 const char *find_lib_name; \
858 \
859 array_for_each(find_lib_arr, n, find_lib_name) \
860 if (!strcmp(find_lib_name, needed)) \
861 ++matched; \
862 \
863 if (matched == array_cnt(find_lib_arr)) { \
852 *found_lib = 1; \ 864 *found_lib = 1; \
853 return (be_wewy_wewy_quiet ? NULL : needed); \ 865 return (be_wewy_wewy_quiet ? NULL : find_lib); \
854 } \ 866 } \
855 } \ 867 } \
856 } \ 868 } \
857 ++dyn; \ 869 ++dyn; \
858 } \ 870 } \
1143 *found_sym = 1; 1155 *found_sym = 1;
1144 if (next_sym) 1156 if (next_sym)
1145 next_sym[-1] = saved; 1157 next_sym[-1] = saved;
1146} 1158}
1147 1159
1148static char *scanelf_file_sym(elfobj *elf, char *found_sym) 1160static const char *scanelf_file_sym(elfobj *elf, char *found_sym)
1149{ 1161{
1150 unsigned long i; 1162 unsigned long i;
1151 char *ret; 1163 char *ret;
1152 void *symtab_void, *strtab_void; 1164 void *symtab_void, *strtab_void;
1153 1165
1200 if (*find_sym != '*' && *found_sym) 1212 if (*find_sym != '*' && *found_sym)
1201 return ret; 1213 return ret;
1202 if (be_quiet) 1214 if (be_quiet)
1203 return NULL; 1215 return NULL;
1204 else 1216 else
1205 return (char *)" - "; 1217 return " - ";
1206} 1218}
1207 1219
1208static char *scanelf_file_sections(elfobj *elf, char *found_section) 1220static const char *scanelf_file_sections(elfobj *elf, char *found_section)
1209{ 1221{
1210 if (!find_section) 1222 if (!find_section)
1211 return NULL; 1223 return NULL;
1212 1224
1213#define FIND_SECTION(B) \ 1225#define FIND_SECTION(B) \
1214 if (elf->elf_class == ELFCLASS ## B) { \ 1226 if (elf->elf_class == ELFCLASS ## B) { \
1227 size_t matched, n; \
1215 int invert; \ 1228 int invert; \
1229 const char *section_name; \
1216 Elf ## B ## _Shdr *section; \ 1230 Elf ## B ## _Shdr *section; \
1231 \
1232 matched = 0; \
1233 array_for_each(find_section_arr, n, section_name) { \
1217 invert = (*find_section == '!' ? 1 : 0); \ 1234 invert = (*section_name == '!' ? 1 : 0); \
1218 section = SHDR ## B (elf_findsecbyname(elf, find_section+invert)); \ 1235 section = SHDR ## B (elf_findsecbyname(elf, section_name + invert)); \
1219 if ((section == NULL && invert) || (section != NULL && !invert)) \ 1236 if ((section == NULL && invert) || (section != NULL && !invert)) \
1237 ++matched; \
1238 } \
1239 \
1240 if (matched == array_cnt(find_section_arr)) \
1220 *found_section = 1; \ 1241 *found_section = 1; \
1221 } 1242 }
1222 FIND_SECTION(32) 1243 FIND_SECTION(32)
1223 FIND_SECTION(64) 1244 FIND_SECTION(64)
1224 1245
1229 return find_section; 1250 return find_section;
1230 1251
1231 if (be_quiet) 1252 if (be_quiet)
1232 return NULL; 1253 return NULL;
1233 else 1254 else
1234 return (char *)" - "; 1255 return " - ";
1235} 1256}
1236 1257
1237/* scan an elf file and show all the fun stuff */ 1258/* scan an elf file and show all the fun stuff */
1238#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; }) 1259#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str)); ret; })
1239static int scanelf_elfobj(elfobj *elf) 1260static int scanelf_elfobj(elfobj *elf)
1411 if (elf->elf_class != ELFCLASS64) 1432 if (elf->elf_class != ELFCLASS64)
1412 goto label_done; 1433 goto label_done;
1413 break; 1434 break;
1414 default: break; 1435 default: break;
1415 } 1436 }
1416 if (strlen(match_etypes)) { 1437 if (match_etypes) {
1417 char sbuf[126]; 1438 char sbuf[126];
1418 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1439 strncpy(sbuf, match_etypes, sizeof(sbuf));
1419 if (strchr(match_etypes, ',') != NULL) { 1440 if (strchr(match_etypes, ',') != NULL) {
1420 char *p; 1441 char *p;
1421 while ((p = strrchr(sbuf, ',')) != NULL) { 1442 while ((p = strrchr(sbuf, ',')) != NULL) {
1495 1516
1496 close(fd); 1517 close(fd);
1497 return 0; 1518 return 0;
1498} 1519}
1499 1520
1521static const char *maybe_add_root(const char *fname, char *buf)
1522{
1523 if (root && strncmp(fname, root, strlen(root))) {
1524 strcpy(buf, root);
1525 strncat(buf, fname, __PAX_UTILS_PATH_MAX - strlen(root) - 1);
1526 fname = buf;
1527 }
1528 return fname;
1529}
1530
1500/* scan a directory for ET_EXEC files and print when we find one */ 1531/* scan a directory for ET_EXEC files and print when we find one */
1501static int scanelf_dir(const char *path) 1532static int scanelf_dir(const char *path)
1502{ 1533{
1503 register DIR *dir; 1534 register DIR *dir;
1504 register struct dirent *dentry; 1535 register struct dirent *dentry;
1505 struct stat st_top, st; 1536 struct stat st_top, st;
1506 char buf[__PAX_UTILS_PATH_MAX]; 1537 char buf[__PAX_UTILS_PATH_MAX];
1538 char _path[__PAX_UTILS_PATH_MAX];
1507 size_t pathlen = 0, len = 0; 1539 size_t pathlen = 0, len = 0;
1508 int ret = 0; 1540 int ret = 0;
1541
1542 path = maybe_add_root(path, _path);
1509 1543
1510 /* make sure path exists */ 1544 /* make sure path exists */
1511 if (lstat(path, &st_top) == -1) { 1545 if (lstat(path, &st_top) == -1) {
1512 if (be_verbose > 2) printf("%s: does not exist\n", path); 1546 if (be_verbose > 2) printf("%s: does not exist\n", path);
1513 return 1; 1547 return 1;
1577static int load_ld_cache_config(int i, const char *fname) 1611static int load_ld_cache_config(int i, const char *fname)
1578{ 1612{
1579 FILE *fp = NULL; 1613 FILE *fp = NULL;
1580 char *p; 1614 char *p;
1581 char path[__PAX_UTILS_PATH_MAX]; 1615 char path[__PAX_UTILS_PATH_MAX];
1616 char _fname[__PAX_UTILS_PATH_MAX];
1582 1617
1583 if (i + 1 == ARRAY_SIZE(ldpaths)) 1618 fname = maybe_add_root(fname, _fname);
1584 return i;
1585 1619
1586 if ((fp = fopen(fname, "r")) == NULL) 1620 if ((fp = fopen(fname, "r")) == NULL)
1587 return i; 1621 return i;
1588 1622
1589 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1623 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1597 glob_t gl; 1631 glob_t gl;
1598 size_t x; 1632 size_t x;
1599 char gpath[__PAX_UTILS_PATH_MAX]; 1633 char gpath[__PAX_UTILS_PATH_MAX];
1600 1634
1601 memset(gpath, 0, sizeof(gpath)); 1635 memset(gpath, 0, sizeof(gpath));
1636 if (root)
1637 strcpy(gpath, root);
1602 1638
1603 if (path[8] != '/') 1639 if (path[8] != '/')
1604 snprintf(gpath, sizeof(gpath), "/etc/%s", &path[8]); 1640 snprintf(gpath+strlen(gpath), sizeof(gpath)-strlen(gpath), "/etc/%s", &path[8]);
1605 else 1641 else
1606 strncpy(gpath, &path[8], sizeof(gpath)); 1642 strncpy(gpath+strlen(gpath), &path[8], sizeof(gpath)-strlen(gpath));
1607 1643
1608 if (glob(gpath, 0, NULL, &gl) == 0) { 1644 if (glob(gpath, 0, NULL, &gl) == 0) {
1609 for (x = 0; x < gl.gl_pathc; ++x) { 1645 for (x = 0; x < gl.gl_pathc; ++x) {
1610 /* try to avoid direct loops */ 1646 /* try to avoid direct loops */
1611 if (strcmp(gl.gl_pathv[x], fname) == 0) 1647 if (strcmp(gl.gl_pathv[x], fname) == 0)
1612 continue; 1648 continue;
1613 i = load_ld_cache_config(i, gl.gl_pathv[x]); 1649 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1614 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1615 globfree(&gl);
1616 return i;
1617 }
1618 } 1650 }
1619 globfree(&gl); 1651 globfree(&gl);
1620 continue; 1652 continue;
1621 } 1653 }
1622 } 1654 }
1623 1655
1624 if (*path != '/') 1656 if (*path != '/')
1625 continue; 1657 continue;
1626 1658
1627 ldpaths[i++] = xstrdup(path); 1659 xarraypush(ldpaths, path, strlen(path));
1628
1629 if (i + 1 == ARRAY_SIZE(ldpaths))
1630 break;
1631 } 1660 }
1632 ldpaths[i] = NULL;
1633 1661
1634 fclose(fp); 1662 fclose(fp);
1635 return i; 1663 return i;
1636} 1664}
1637 1665
1640static int load_ld_cache_config(int i, const char *fname) 1668static int load_ld_cache_config(int i, const char *fname)
1641{ 1669{
1642 FILE *fp = NULL; 1670 FILE *fp = NULL;
1643 char *b = NULL, *p; 1671 char *b = NULL, *p;
1644 struct elfhints_hdr hdr; 1672 struct elfhints_hdr hdr;
1673 char _fname[__PAX_UTILS_PATH_MAX];
1645 1674
1646 if (i + 1 == ARRAY_SIZE(ldpaths)) 1675 fname = maybe_add_root(fname, _fname);
1647 return i;
1648 1676
1649 if ((fp = fopen(fname, "r")) == NULL) 1677 if ((fp = fopen(fname, "r")) == NULL)
1650 return i; 1678 return i;
1651 1679
1652 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1680 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1663 free(b); 1691 free(b);
1664 return i; 1692 return i;
1665 } 1693 }
1666 1694
1667 while ((p = strsep(&b, ":"))) { 1695 while ((p = strsep(&b, ":"))) {
1668 if (*p == '\0') continue; 1696 if (*p == '\0')
1669 ldpaths[i++] = xstrdup(p); 1697 continue;
1670 1698 xarraypush(ldpaths, p, strlen(p));
1671 if (i + 1 == ARRAY_SIZE(ldpaths))
1672 break;
1673 } 1699 }
1674 ldpaths[i] = NULL;
1675 1700
1676 free(b); 1701 free(b);
1677 fclose(fp); 1702 fclose(fp);
1678 return i; 1703 return i;
1679} 1704}
1682#ifdef __ELF__ 1707#ifdef __ELF__
1683#warning Cache config support not implemented for your target 1708#warning Cache config support not implemented for your target
1684#endif 1709#endif
1685static int load_ld_cache_config(int i, const char *fname) 1710static int load_ld_cache_config(int i, const char *fname)
1686{ 1711{
1687 memset(ldpaths, 0x00, sizeof(ldpaths));
1688 return 0; 1712 return 0;
1689} 1713}
1690#endif 1714#endif
1691 1715
1692/* scan /etc/ld.so.conf for paths */ 1716/* scan /etc/ld.so.conf for paths */
1693static void scanelf_ldpath(void) 1717static void scanelf_ldpath(void)
1694{ 1718{
1695 char scan_l, scan_ul, scan_ull; 1719 char scan_l, scan_ul, scan_ull;
1720 size_t n;
1721 const char *ldpath;
1696 int i = 0; 1722 int i = 0;
1697 1723
1698 if (!ldpaths[0]) 1724 if (array_cnt(ldpaths) == 0)
1699 err("Unable to load any paths from ld.so.conf"); 1725 err("Unable to load any paths from ld.so.conf");
1700 1726
1701 scan_l = scan_ul = scan_ull = 0; 1727 scan_l = scan_ul = scan_ull = 0;
1702 1728
1703 while (ldpaths[i]) { 1729 array_for_each(ldpaths, n, ldpath) {
1704 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1; 1730 if (!scan_l && !strcmp(ldpath, "/lib")) scan_l = 1;
1705 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1; 1731 if (!scan_ul && !strcmp(ldpath, "/usr/lib")) scan_ul = 1;
1706 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1; 1732 if (!scan_ull && !strcmp(ldpath, "/usr/local/lib")) scan_ull = 1;
1707 scanelf_dir(ldpaths[i]); 1733 scanelf_dir(ldpath);
1708 ++i; 1734 ++i;
1709 } 1735 }
1710 1736
1711 if (!scan_l) scanelf_dir("/lib"); 1737 if (!scan_l) scanelf_dir("/lib");
1712 if (!scan_ul) scanelf_dir("/usr/lib"); 1738 if (!scan_ul) scanelf_dir("/usr/lib");
1729 } 1755 }
1730 1756
1731 free(path); 1757 free(path);
1732} 1758}
1733 1759
1734/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H J K P Q U W */ 1760/* usage / invocation handling functions */ /* Free Flags: c d j u w G H J K P Q U W */
1735#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZBhV" 1761#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DIYO:ZCBhV"
1736#define a_argument required_argument 1762#define a_argument required_argument
1737static struct option const long_opts[] = { 1763static struct option const long_opts[] = {
1738 {"path", no_argument, NULL, 'p'}, 1764 {"path", no_argument, NULL, 'p'},
1739 {"ldpath", no_argument, NULL, 'l'}, 1765 {"ldpath", no_argument, NULL, 'l'},
1766 {"root", a_argument, NULL, 128},
1740 {"recursive", no_argument, NULL, 'R'}, 1767 {"recursive", no_argument, NULL, 'R'},
1741 {"mount", no_argument, NULL, 'm'}, 1768 {"mount", no_argument, NULL, 'm'},
1742 {"symlink", no_argument, NULL, 'y'}, 1769 {"symlink", no_argument, NULL, 'y'},
1743 {"archives", no_argument, NULL, 'A'}, 1770 {"archives", no_argument, NULL, 'A'},
1744 {"ldcache", no_argument, NULL, 'L'}, 1771 {"ldcache", no_argument, NULL, 'L'},
1768 {"quiet", no_argument, NULL, 'q'}, 1795 {"quiet", no_argument, NULL, 'q'},
1769 {"verbose", no_argument, NULL, 'v'}, 1796 {"verbose", no_argument, NULL, 'v'},
1770 {"format", a_argument, NULL, 'F'}, 1797 {"format", a_argument, NULL, 'F'},
1771 {"from", a_argument, NULL, 'f'}, 1798 {"from", a_argument, NULL, 'f'},
1772 {"file", a_argument, NULL, 'o'}, 1799 {"file", a_argument, NULL, 'o'},
1800 {"nocolor", no_argument, NULL, 'C'},
1773 {"nobanner", no_argument, NULL, 'B'}, 1801 {"nobanner", no_argument, NULL, 'B'},
1774 {"help", no_argument, NULL, 'h'}, 1802 {"help", no_argument, NULL, 'h'},
1775 {"version", no_argument, NULL, 'V'}, 1803 {"version", no_argument, NULL, 'V'},
1776 {NULL, no_argument, NULL, 0x0} 1804 {NULL, no_argument, NULL, 0x0}
1777}; 1805};
1778 1806
1779static const char *opts_help[] = { 1807static const char * const opts_help[] = {
1780 "Scan all directories in PATH environment", 1808 "Scan all directories in PATH environment",
1781 "Scan all directories in /etc/ld.so.conf", 1809 "Scan all directories in /etc/ld.so.conf",
1810 "Root directory (use with -l or -p)",
1782 "Scan directories recursively", 1811 "Scan directories recursively",
1783 "Don't recursively cross mount points", 1812 "Don't recursively cross mount points",
1784 "Don't scan symlinks", 1813 "Don't scan symlinks",
1785 "Scan archives (.a files)", 1814 "Scan archives (.a files)",
1786 "Utilize ld.so.cache information (use with -r/-n)", 1815 "Utilize ld.so.cache information (use with -r/-n)",
1795 "Print BIND information", 1824 "Print BIND information",
1796 "Print SONAME information", 1825 "Print SONAME information",
1797 "Find a specified symbol", 1826 "Find a specified symbol",
1798 "Find a specified section", 1827 "Find a specified section",
1799 "Find a specified library", 1828 "Find a specified library",
1800 "Use strncmp to match libraries. (use with -N)", 1829 "Use regex matching rather than string compare (use with -s)",
1801 "Locate cause of TEXTREL", 1830 "Locate cause of TEXTREL",
1802 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1831 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1803 "Print only ELF files matching numeric bits", 1832 "Print only ELF files matching numeric bits",
1804 "Print Endianness", 1833 "Print Endianness",
1805 "Print OSABI", 1834 "Print OSABI",
1810 "Only output 'bad' things", 1839 "Only output 'bad' things",
1811 "Be verbose (can be specified more than once)", 1840 "Be verbose (can be specified more than once)",
1812 "Use specified format for output", 1841 "Use specified format for output",
1813 "Read input stream from a filename", 1842 "Read input stream from a filename",
1814 "Write output stream to a filename", 1843 "Write output stream to a filename",
1844 "Don't emit color in output",
1815 "Don't display the header", 1845 "Don't display the header",
1816 "Print this help and exit", 1846 "Print this help and exit",
1817 "Print version and exit", 1847 "Print version and exit",
1818 NULL 1848 NULL
1819}; 1849};
1826 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 1856 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1827 printf("Options: -[%s]\n", PARSE_FLAGS); 1857 printf("Options: -[%s]\n", PARSE_FLAGS);
1828 for (i = 0; long_opts[i].name; ++i) 1858 for (i = 0; long_opts[i].name; ++i)
1829 if (long_opts[i].has_arg == no_argument) 1859 if (long_opts[i].has_arg == no_argument)
1830 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1860 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1861 long_opts[i].name, opts_help[i]);
1862 else if (long_opts[i].val > '~')
1863 printf(" --%-7s <arg> * %s\n",
1831 long_opts[i].name, opts_help[i]); 1864 long_opts[i].name, opts_help[i]);
1832 else 1865 else
1833 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1866 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1834 long_opts[i].name, opts_help[i]); 1867 long_opts[i].name, opts_help[i]);
1835 1868
1866 case 'f': 1899 case 'f':
1867 if (from_file) warn("You prob don't want to specify -f twice"); 1900 if (from_file) warn("You prob don't want to specify -f twice");
1868 from_file = optarg; 1901 from_file = optarg;
1869 break; 1902 break;
1870 case 'E': 1903 case 'E':
1871 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1904 match_etypes = optarg;
1872 break; 1905 break;
1873 case 'M': 1906 case 'M':
1874 match_bits = atoi(optarg); 1907 match_bits = atoi(optarg);
1875 if (match_bits == 0) { 1908 if (match_bits == 0) {
1876 if (strcmp(optarg, "ELFCLASS32") == 0) 1909 if (strcmp(optarg, "ELFCLASS32") == 0)
1887 if (freopen(optarg, "w", stdout) == NULL) 1920 if (freopen(optarg, "w", stdout) == NULL)
1888 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1921 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1889 break; 1922 break;
1890 } 1923 }
1891 case 'k': 1924 case 'k':
1892 if (find_section) warn("You prob don't want to specify -k twice"); 1925 xarraypush(find_section_arr, optarg, strlen(optarg));
1893 find_section = optarg;
1894 break; 1926 break;
1895 case 's': { 1927 case 's': {
1896 if (find_sym) warn("You prob don't want to specify -s twice"); 1928 if (find_sym) warn("You prob don't want to specify -s twice");
1897 find_sym = optarg; 1929 find_sym = optarg;
1898 break; 1930 break;
1899 } 1931 }
1900 case 'N': { 1932 case 'N':
1901 if (find_lib) warn("You prob don't want to specify -N twice"); 1933 xarraypush(find_lib_arr, optarg, strlen(optarg));
1902 find_lib = optarg;
1903 break; 1934 break;
1904 }
1905
1906 case 'F': { 1935 case 'F': {
1907 if (out_format) warn("You prob don't want to specify -F twice"); 1936 if (out_format) warn("You prob don't want to specify -F twice");
1908 out_format = optarg; 1937 out_format = optarg;
1909 break; 1938 break;
1910 } 1939 }
1954 case 'Z': show_size = 1; break; 1983 case 'Z': show_size = 1; break;
1955 case 'g': g_match = 1; break; 1984 case 'g': g_match = 1; break;
1956 case 'L': use_ldcache = 1; break; 1985 case 'L': use_ldcache = 1; break;
1957 case 'y': scan_symlink = 0; break; 1986 case 'y': scan_symlink = 0; break;
1958 case 'A': scan_archives = 1; break; 1987 case 'A': scan_archives = 1; break;
1988 case 'C': color_init(true); break;
1959 case 'B': show_banner = 0; break; 1989 case 'B': show_banner = 0; break;
1960 case 'l': scan_ldpath = 1; break; 1990 case 'l': scan_ldpath = 1; break;
1961 case 'p': scan_envpath = 1; break; 1991 case 'p': scan_envpath = 1; break;
1962 case 'R': dir_recurse = 1; break; 1992 case 'R': dir_recurse = 1; break;
1963 case 'm': dir_crossmount = 0; break; 1993 case 'm': dir_crossmount = 0; break;
1975 case 'v': be_verbose = (be_verbose % 20) + 1; break; 2005 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1976 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break; 2006 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1977 case 'D': show_endian = 1; break; 2007 case 'D': show_endian = 1; break;
1978 case 'I': show_osabi = 1; break; 2008 case 'I': show_osabi = 1; break;
1979 case 'Y': show_eabi = 1; break; 2009 case 'Y': show_eabi = 1; break;
2010 case 128:
2011 root = optarg;
2012 break;
1980 case ':': 2013 case ':':
1981 err("Option '%c' is missing parameter", optopt); 2014 err("Option '%c' is missing parameter", optopt);
1982 case '?': 2015 case '?':
1983 err("Unknown option '%c' or argument missing", optopt); 2016 err("Unknown option '%c' or argument missing", optopt);
1984 default: 2017 default:
1987 } 2020 }
1988 if (show_textrels && be_verbose) { 2021 if (show_textrels && be_verbose) {
1989 if (which("objdump") != NULL) 2022 if (which("objdump") != NULL)
1990 has_objdump = 1; 2023 has_objdump = 1;
1991 } 2024 }
2025 /* flatten arrays for display */
2026 if (array_cnt(find_lib_arr))
2027 find_lib = array_flatten_str(find_lib_arr);
2028 if (array_cnt(find_section_arr))
2029 find_section = array_flatten_str(find_section_arr);
1992 /* let the format option override all other options */ 2030 /* let the format option override all other options */
1993 if (out_format) { 2031 if (out_format) {
1994 show_pax = show_phdr = show_textrel = show_rpath = \ 2032 show_pax = show_phdr = show_textrel = show_rpath = \
1995 show_needed = show_interp = show_bind = show_soname = \ 2033 show_needed = show_interp = show_bind = show_soname = \
1996 show_textrels = show_perms = show_endian = show_size = \ 2034 show_textrels = show_perms = show_endian = show_size = \
2075 search_path = argv[optind++]; 2113 search_path = argv[optind++];
2076 ret = scanelf_dir(search_path); 2114 ret = scanelf_dir(search_path);
2077 } 2115 }
2078 2116
2079 /* clean up */ 2117 /* clean up */
2080 for (i = 0; ldpaths[i]; ++i)
2081 free(ldpaths[i]); 2118 xarrayfree(ldpaths);
2119 xarrayfree(find_lib_arr);
2120 xarrayfree(find_section_arr);
2121 free(find_lib);
2122 free(find_section);
2082 2123
2083 if (ldcache != 0) 2124 if (ldcache != 0)
2084 munmap(ldcache, ldcache_size); 2125 munmap(ldcache, ldcache_size);
2085 return ret; 2126 return ret;
2086} 2127}
2119 return envvals; 2160 return envvals;
2120} 2161}
2121 2162
2122static void parseenv(void) 2163static void parseenv(void)
2123{ 2164{
2165 color_init(false);
2124 qa_textrels = get_split_env("QA_TEXTRELS"); 2166 qa_textrels = get_split_env("QA_TEXTRELS");
2125 qa_execstack = get_split_env("QA_EXECSTACK"); 2167 qa_execstack = get_split_env("QA_EXECSTACK");
2126 qa_wx_load = get_split_env("QA_WX_LOAD"); 2168 qa_wx_load = get_split_env("QA_WX_LOAD");
2127} 2169}
2128 2170

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