/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.140 Revision 1.188
1/* 1/*
2 * Copyright 2003-2006 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 1.140 2006/04/15 07:52:00 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.188 2007/08/31 17:45:24 solar Exp $
5 * 5 *
6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2007 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2006 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 1.188 2007/08/31 17:45:24 solar Exp $";
11const char * const argv0 = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11#ifdef __linux__
12 #include <glob.h>
13#endif
14static const char *rcsid = "$Id: scanelf.c,v 1.140 2006/04/15 07:52:00 vapier Exp $";
15#define argv0 "scanelf"
16 14
17#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
18 16
19#define do_state(option, flag) \
20 if (islower(option)) { \
21 flags &= ~PF_##flag; \
22 flags |= PF_NO##flag; \
23 } else { \
24 flags &= ~PF_NO##flag; \
25 flags |= PF_##flag; \
26 }
27
28
29/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist);
30static int scanelf_elfobj(elfobj *elf); 19static int scanelf_elfobj(elfobj *elf);
31static int scanelf_elf(const char *filename, int fd, size_t len); 20static int scanelf_elf(const char *filename, int fd, size_t len);
32static int scanelf_archive(const char *filename, int fd, size_t len); 21static int scanelf_archive(const char *filename, int fd, size_t len);
33static void scanelf_file(const char *filename); 22static int scanelf_file(const char *filename, const struct stat *st_cache);
34static void scanelf_dir(const char *path); 23static int scanelf_dir(const char *path);
35static void scanelf_ldpath(void); 24static void scanelf_ldpath(void);
36static void scanelf_envpath(void); 25static void scanelf_envpath(void);
37static void usage(int status); 26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
38static void parseargs(int argc, char *argv[]); 29static int parseargs(int argc, char *argv[]);
39static char *xstrdup(const char *s); 30static int rematch(const char *regex, const char *match, int cflags);
40static void *xmalloc(size_t size);
41static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
42#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
43static inline void xchrcat(char **dst, const char append, size_t *curr_len);
44 31
45/* variables to control behavior */ 32/* variables to control behavior */
46static char match_etypes[126] = ""; 33static char match_etypes[126] = "";
47static char *ldpaths[256]; 34static char *ldpaths[256];
48static char scan_ldpath = 0; 35static char scan_ldpath = 0;
50static char scan_symlink = 1; 37static char scan_symlink = 1;
51static char scan_archives = 0; 38static char scan_archives = 0;
52static char dir_recurse = 0; 39static char dir_recurse = 0;
53static char dir_crossmount = 1; 40static char dir_crossmount = 1;
54static char show_pax = 0; 41static char show_pax = 0;
42static char show_perms = 0;
55static char show_phdr = 0; 43static char show_phdr = 0;
56static char show_textrel = 0; 44static char show_textrel = 0;
57static char show_rpath = 0; 45static char show_rpath = 0;
58static char show_needed = 0; 46static char show_needed = 0;
59static char show_interp = 0; 47static char show_interp = 0;
60static char show_bind = 0; 48static char show_bind = 0;
61static char show_soname = 0; 49static char show_soname = 0;
62static char show_textrels = 0; 50static char show_textrels = 0;
63static char show_banner = 1; 51static char show_banner = 1;
52static char show_endian = 0;
64static char be_quiet = 0; 53static char be_quiet = 0;
65static char be_verbose = 0; 54static char be_verbose = 0;
66static char be_wewy_wewy_quiet = 0; 55static char be_wewy_wewy_quiet = 0;
67static char be_semi_verbose = 0; 56static char be_semi_verbose = 0;
68static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
69static char *find_lib = NULL; 58static char *find_lib = NULL;
70static char *find_section = NULL; 59static char *find_section = NULL;
71static char *out_format = NULL; 60static char *out_format = NULL;
72static char *search_path = NULL; 61static char *search_path = NULL;
73static char fix_elf = 0; 62static char fix_elf = 0;
74static char gmatch = 0; 63static char g_match = 0;
75static char use_ldcache = 0; 64static char use_ldcache = 0;
76 65
66static char **qa_textrels = NULL;
67static char **qa_execstack = NULL;
68static char **qa_wx_load = NULL;
69
77int match_bits = 0; 70int match_bits = 0;
71unsigned int match_perms = 0;
78caddr_t ldcache = 0; 72caddr_t ldcache = 0;
79size_t ldcache_size = 0; 73size_t ldcache_size = 0;
80unsigned long setpax = 0UL; 74unsigned long setpax = 0UL;
75
76int has_objdump = 0;
77
78static char *getstr_perms(const char *fname);
79static char *getstr_perms(const char *fname)
80{
81 struct stat st;
82 static char buf[8];
83
84 if ((stat(fname, &st)) == (-1))
85 return (char *) "";
86
87 snprintf(buf, sizeof(buf), "%o", st.st_mode);
88
89 return (char *) buf + 2;
90}
91
92/* find the path to a file by name */
93static char *which(const char *fname)
94{
95 static char fullpath[BUFSIZ];
96 char *path, *p;
97
98 path = getenv("PATH");
99 if (!path)
100 return NULL;
101
102 path = xstrdup(path);
103 while ((p = strrchr(path, ':')) != NULL) {
104 snprintf(fullpath, sizeof(fullpath), "%s/%s", p + 1, fname);
105 *p = 0;
106 if (access(fullpath, R_OK) != (-1)) {
107 free(path);
108 return (char *) fullpath;
109 }
110 }
111 free(path);
112 return NULL;
113}
114
115/* 1 on failure. 0 otherwise */
116static int rematch(const char *regex, const char *match, int cflags)
117{
118 regex_t preg;
119 int ret;
120
121 if ((match == NULL) || (regex == NULL))
122 return EXIT_FAILURE;
123
124
125 if ((ret = regcomp(&preg, regex, cflags))) {
126 char err[256];
127
128 if (regerror(ret, &preg, err, sizeof(err)))
129 fprintf(stderr, "regcomp failed: %s", err);
130 else
131 fprintf(stderr, "regcomp failed");
132
133 return EXIT_FAILURE;
134 }
135 ret = regexec(&preg, match, 0, NULL, 0);
136 regfree(&preg);
137
138 return ret;
139}
81 140
82/* sub-funcs for scanelf_file() */ 141/* sub-funcs for scanelf_file() */
83static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 142static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
84{ 143{
85 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 144 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
193 uint32_t flags, check_flags; \ 252 uint32_t flags, check_flags; \
194 if (elf->phdr != NULL) { \ 253 if (elf->phdr != NULL) { \
195 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 254 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
196 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 255 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
197 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 256 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
257 if (multi_stack++) \
198 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 258 warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
259 if (file_matches_list(elf->filename, qa_execstack)) \
260 continue; \
199 found = found_phdr; \ 261 found = found_phdr; \
200 offset = 0; \ 262 offset = 0; \
201 check_flags = PF_X; \ 263 check_flags = PF_X; \
202 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 264 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
265 if (multi_relro++) \
203 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 266 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
204 found = found_relro; \ 267 found = found_relro; \
205 offset = 4; \ 268 offset = 4; \
206 check_flags = PF_X; \ 269 check_flags = PF_X; \
207 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 270 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
208 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \ 271 if (EGET(ehdr->e_type) == ET_DYN || EGET(ehdr->e_type) == ET_EXEC) \
272 if (multi_load++ > max_pt_load) \
209 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \ 273 warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
274 if (file_matches_list(elf->filename, qa_wx_load)) \
275 continue; \
210 found = found_load; \ 276 found = found_load; \
211 offset = 8; \ 277 offset = 8; \
212 check_flags = PF_W|PF_X; \ 278 check_flags = PF_W|PF_X; \
213 } else \ 279 } else \
214 continue; \ 280 continue; \
251 break; \ 317 break; \
252 } \ 318 } \
253 } \ 319 } \
254 skip_this_shdr##B: \ 320 skip_this_shdr##B: \
255 if (!multi_stack) { \ 321 if (!multi_stack) { \
322 if (file_matches_list(elf->filename, qa_execstack)) \
323 return NULL; \
256 *found_phdr = 1; \ 324 *found_phdr = 1; \
257 shown = 1; \ 325 shown = 1; \
258 memcpy(ret, "!WX", 3); \ 326 memcpy(ret, "!WX", 3); \
259 } \ 327 } \
260 } \ 328 } \
265 if (be_wewy_wewy_quiet || (be_quiet && !shown)) 333 if (be_wewy_wewy_quiet || (be_quiet && !shown))
266 return NULL; 334 return NULL;
267 else 335 else
268 return ret; 336 return ret;
269} 337}
338
339/*
340 * See if this ELF contains a DT_TEXTREL tag in any of its
341 * PT_DYNAMIC sections.
342 */
270static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 343static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
271{ 344{
272 static const char *ret = "TEXTREL"; 345 static const char *ret = "TEXTREL";
273 unsigned long i; 346 unsigned long i;
274 347
275 if (!show_textrel && !show_textrels) return NULL; 348 if (!show_textrel && !show_textrels) return NULL;
349
350 if (file_matches_list(elf->filename, qa_textrels)) return NULL;
276 351
277 if (elf->phdr) { 352 if (elf->phdr) {
278#define SHOW_TEXTREL(B) \ 353#define SHOW_TEXTREL(B) \
279 if (elf->elf_class == ELFCLASS ## B) { \ 354 if (elf->elf_class == ELFCLASS ## B) { \
280 Elf ## B ## _Dyn *dyn; \ 355 Elf ## B ## _Dyn *dyn; \
281 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 356 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
282 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 357 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
283 Elf ## B ## _Off offset; \ 358 Elf ## B ## _Off offset; \
284 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 359 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
285 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 360 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
286 offset = EGET(phdr[i].p_offset); \ 361 offset = EGET(phdr[i].p_offset); \
287 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 362 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
288 dyn = DYN ## B (elf->data + offset); \ 363 dyn = DYN ## B (elf->data + offset); \
289 while (EGET(dyn->d_tag) != DT_NULL) { \ 364 while (EGET(dyn->d_tag) != DT_NULL) { \
290 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 365 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
302 if (be_quiet || be_wewy_wewy_quiet) 377 if (be_quiet || be_wewy_wewy_quiet)
303 return NULL; 378 return NULL;
304 else 379 else
305 return " - "; 380 return " - ";
306} 381}
382
383/*
384 * Scan the .text section to see if there are any relocations in it.
385 * Should rewrite this to check PT_LOAD sections that are marked
386 * Executable rather than the section named '.text'.
387 */
307static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 388static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
308{ 389{
309 unsigned long s, r, rmax; 390 unsigned long s, r, rmax;
310 void *symtab_void, *strtab_void, *text_void; 391 void *symtab_void, *strtab_void, *text_void;
311 392
378 /* show the raw details about this reloc */ \ 459 /* show the raw details about this reloc */ \
379 printf(" %s: ", elf->base_filename); \ 460 printf(" %s: ", elf->base_filename); \
380 if (sym && sym->st_name) \ 461 if (sym && sym->st_name) \
381 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \ 462 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
382 else \ 463 else \
383 printf("(memory/fake?)"); \ 464 printf("(memory/data?)"); \
384 printf(" [0x%lX]", (unsigned long)r_offset); \ 465 printf(" [0x%lX]", (unsigned long)r_offset); \
385 /* now try to find the closest symbol that this rel is probably in */ \ 466 /* now try to find the closest symbol that this rel is probably in */ \
386 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 467 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
387 func = NULL; \ 468 func = NULL; \
388 offset_tmp = 0; \ 469 offset_tmp = 0; \
392 offset_tmp = EGET(sym->st_value); \ 473 offset_tmp = EGET(sym->st_value); \
393 } \ 474 } \
394 ++sym; \ 475 ++sym; \
395 } \ 476 } \
396 printf(" in "); \ 477 printf(" in "); \
397 if (func && func->st_name) \ 478 if (func && func->st_name) { \
398 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \ 479 const char *func_name = elf->data + EGET(strtab->sh_offset) + EGET(func->st_name); \
480 if (r_offset > EGET(func->st_size)) \
481 printf("(optimized out: previous %s)", func_name); \
399 else \ 482 else \
400 printf("(NULL: fake?)"); \ 483 printf("%s", func_name); \
484 } else \
485 printf("(optimized out)"); \
401 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \ 486 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
487 if (be_verbose && has_objdump) { \
488 Elf ## B ## _Addr end_addr = offset_tmp + EGET(func->st_size); \
489 char *sysbuf; \
490 size_t syslen; \
491 const char sysfmt[] = "objdump -r -R -d -w -l --start-address=0x%lX --stop-address=0x%lX %s | grep --color -i -C 3 '.*[[:space:]]%lX:[[:space:]]*R_.*'\n"; \
492 syslen = sizeof(sysfmt) + strlen(elf->filename) + 3 * sizeof(unsigned long) + 1; \
493 sysbuf = xmalloc(syslen); \
494 if (end_addr < r_offset) \
495 /* not uncommon when things are optimized out */ \
496 end_addr = r_offset + 0x100; \
497 snprintf(sysbuf, syslen, sysfmt, \
498 (unsigned long)offset_tmp, \
499 (unsigned long)end_addr, \
500 elf->filename, \
501 (unsigned long)r_offset); \
502 fflush(stdout); \
503 system(sysbuf); \
504 fflush(stdout); \
505 free(sysbuf); \
506 } \
402 } \ 507 } \
403 } } 508 } }
404 SHOW_TEXTRELS(32) 509 SHOW_TEXTRELS(32)
405 SHOW_TEXTRELS(64) 510 SHOW_TEXTRELS(64)
406 } 511 }
424 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 529 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
425 break; 530 break;
426 case '$': 531 case '$':
427 if (fstat(elf->fd, &st) != -1) 532 if (fstat(elf->fd, &st) != -1)
428 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 533 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
429 warnf("Security problem with %s='%s' in %s with mode set of %o", 534 warnf("Security problem with %s='%s' in %s with mode set of %o",
430 dt_type, item, elf->filename, st.st_mode & 07777); 535 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
431 break; 536 break;
432 default: 537 default:
433 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename); 538 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
434 break; 539 break;
435 } 540 }
455 Elf ## B ## _Off offset; \ 560 Elf ## B ## _Off offset; \
456 Elf ## B ## _Xword word; \ 561 Elf ## B ## _Xword word; \
457 /* Scan all the program headers */ \ 562 /* Scan all the program headers */ \
458 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 563 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
459 /* Just scan dynamic headers */ \ 564 /* Just scan dynamic headers */ \
460 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 565 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
461 offset = EGET(phdr[i].p_offset); \ 566 offset = EGET(phdr[i].p_offset); \
462 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 567 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
463 /* Just scan dynamic RPATH/RUNPATH headers */ \ 568 /* Just scan dynamic RPATH/RUNPATH headers */ \
464 dyn = DYN ## B (elf->data + offset); \ 569 dyn = DYN ## B (elf->data + offset); \
465 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 570 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
594#define FLAG_POWERPC_LIB64 0x0500 699#define FLAG_POWERPC_LIB64 0x0500
595#define FLAG_MIPS64_LIBN32 0x0600 700#define FLAG_MIPS64_LIBN32 0x0600
596#define FLAG_MIPS64_LIBN64 0x0700 701#define FLAG_MIPS64_LIBN64 0x0700
597 702
598static char *lookup_cache_lib(elfobj *, char *); 703static char *lookup_cache_lib(elfobj *, char *);
704
705#if defined(__GLIBC__) || defined(__UCLIBC__)
706
599static char *lookup_cache_lib(elfobj *elf, char *fname) 707static char *lookup_cache_lib(elfobj *elf, char *fname)
600{ 708{
601 int fd = 0; 709 int fd = 0;
602 char *strs; 710 char *strs;
603 static char buf[__PAX_UTILS_PATH_MAX] = ""; 711 static char buf[__PAX_UTILS_PATH_MAX] = "";
659 continue; 767 continue;
660 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 768 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
661 } 769 }
662 return buf; 770 return buf;
663} 771}
772#elif defined(__NetBSD__)
773static char *lookup_cache_lib(elfobj *elf, char *fname)
774{
775 static char buf[__PAX_UTILS_PATH_MAX] = "";
776 static struct stat st;
664 777
778 char **ldpath;
779 for (ldpath = ldpaths; *ldpath != NULL; ldpath++) {
780 if ((unsigned) snprintf(buf, sizeof(buf), "%s/%s", *ldpath, fname) >= sizeof(buf))
781 continue; /* if the pathname is too long, or something went wrong, ignore */
782
783 if (stat(buf, &st) != 0)
784 continue; /* if the lib doesn't exist in *ldpath, look further */
785
786 /* NetBSD doesn't actually do sanity checks, it just loads the file
787 * and if that doesn't work, continues looking in other directories.
788 * This cannot easily be safely emulated, unfortunately. For now,
789 * just assume that if it exists, it's a valid library. */
790
791 return buf;
792 }
793
794 /* not found in any path */
795 return NULL;
796}
797#else
798#warning Cache support not implemented for your target
799static char *lookup_cache_lib(elfobj *elf, char *fname)
800{
801 return NULL;
802}
803#endif
665 804
666static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 805static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
667{ 806{
668 unsigned long i; 807 unsigned long i;
669 char *needed; 808 char *needed;
681 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 820 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
682 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 821 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
683 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 822 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
684 Elf ## B ## _Off offset; \ 823 Elf ## B ## _Off offset; \
685 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 824 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
686 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 825 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
687 offset = EGET(phdr[i].p_offset); \ 826 offset = EGET(phdr[i].p_offset); \
688 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 827 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
689 dyn = DYN ## B (elf->data + offset); \ 828 dyn = DYN ## B (elf->data + offset); \
690 while (EGET(dyn->d_tag) != DT_NULL) { \ 829 while (EGET(dyn->d_tag) != DT_NULL) { \
691 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 830 if (EGET(dyn->d_tag) == DT_NEEDED) { \
703 needed = p; \ 842 needed = p; \
704 xstrcat(ret, needed, ret_len); \ 843 xstrcat(ret, needed, ret_len); \
705 } \ 844 } \
706 *found_needed = 1; \ 845 *found_needed = 1; \
707 } else { \ 846 } else { \
708 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 847 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
709 *found_lib = 1; \ 848 *found_lib = 1; \
710 return (be_wewy_wewy_quiet ? NULL : needed); \ 849 return (be_wewy_wewy_quiet ? NULL : needed); \
711 } \ 850 } \
712 } \ 851 } \
713 } \ 852 } \
756 Elf ## B ## _Dyn *dyn; \ 895 Elf ## B ## _Dyn *dyn; \
757 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 896 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
758 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 897 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
759 Elf ## B ## _Off offset; \ 898 Elf ## B ## _Off offset; \
760 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 899 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
761 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 900 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
762 dynamic = 1; \ 901 dynamic = 1; \
763 offset = EGET(phdr[i].p_offset); \ 902 offset = EGET(phdr[i].p_offset); \
764 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 903 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
765 dyn = DYN ## B (elf->data + offset); \ 904 dyn = DYN ## B (elf->data + offset); \
766 while (EGET(dyn->d_tag) != DT_NULL) { \ 905 while (EGET(dyn->d_tag) != DT_NULL) { \
778 SHOW_BIND(32) 917 SHOW_BIND(32)
779 SHOW_BIND(64) 918 SHOW_BIND(64)
780 919
781 if (be_wewy_wewy_quiet) return NULL; 920 if (be_wewy_wewy_quiet) return NULL;
782 921
922 /* don't output anything if quiet mode and the ELF is static or not setuid */
783 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 923 if (be_quiet && (!dynamic || (!fstat(elf->fd, &s) && !(s.st_mode & (S_ISUID|S_ISGID))))) {
784 return NULL; 924 return NULL;
785 } else { 925 } else {
786 *found_bind = 1; 926 *found_bind = 1;
787 return (char *) (dynamic ? "LAZY" : "STATIC"); 927 return (char *) (dynamic ? "LAZY" : "STATIC");
788 } 928 }
804 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 944 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
805 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 945 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
806 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 946 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
807 Elf ## B ## _Off offset; \ 947 Elf ## B ## _Off offset; \
808 /* only look for soname in shared objects */ \ 948 /* only look for soname in shared objects */ \
809 if (ehdr->e_type != ET_DYN) \ 949 if (EGET(ehdr->e_type) != ET_DYN) \
810 return NULL; \ 950 return NULL; \
811 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 951 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
812 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 952 if (EGET(phdr[i].p_type) != PT_DYNAMIC || EGET(phdr[i].p_filesz) == 0) continue; \
813 offset = EGET(phdr[i].p_offset); \ 953 offset = EGET(phdr[i].p_offset); \
814 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 954 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
815 dyn = DYN ## B (elf->data + offset); \ 955 dyn = DYN ## B (elf->data + offset); \
816 while (EGET(dyn->d_tag) != DT_NULL) { \ 956 while (EGET(dyn->d_tag) != DT_NULL) { \
817 if (EGET(dyn->d_tag) == DT_SONAME) { \ 957 if (EGET(dyn->d_tag) == DT_SONAME) { \
831 SHOW_SONAME(64) 971 SHOW_SONAME(64)
832 } 972 }
833 973
834 return NULL; 974 return NULL;
835} 975}
976
836static char *scanelf_file_sym(elfobj *elf, char *found_sym) 977static char *scanelf_file_sym(elfobj *elf, char *found_sym)
837{ 978{
838 unsigned long i; 979 unsigned long i;
839 char *ret; 980 char *ret;
840 void *symtab_void, *strtab_void; 981 void *symtab_void, *strtab_void;
862 warnf("%s: corrupt ELF symbols", elf->filename); \ 1003 warnf("%s: corrupt ELF symbols", elf->filename); \
863 ++sym; \ 1004 ++sym; \
864 continue; \ 1005 continue; \
865 } \ 1006 } \
866 /* debug display ... show all symbols and some extra info */ \ 1007 /* debug display ... show all symbols and some extra info */ \
867 if (*ret == '*') { \ 1008 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
868 printf("%s(%s) %5lX %15s %s\n", \ 1009 printf("%s(%s) %5lX %15s %s %s\n", \
869 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1010 ((*found_sym == 0) ? "\n\t" : "\t"), \
870 elf->base_filename, \ 1011 elf->base_filename, \
871 (unsigned long)sym->st_size, \ 1012 (unsigned long)sym->st_size, \
872 get_elfstttype(sym->st_info), \ 1013 get_elfstttype(sym->st_info), \
873 symname); \ 1014 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
874 *found_sym = 1; \ 1015 *found_sym = 1; \
875 } else { \ 1016 } else { \
876 /* allow the user to specify a comma delimited list of symbols to search for */ \ 1017 /* allow the user to specify a comma delimited list of symbols to search for */ \
877 char *this_sym, *next_sym; \ 1018 char *this_sym, *this_sym_ver, *next_sym; \
878 this_sym = ret; \ 1019 this_sym = ret; \
1020 this_sym_ver = versioned_symname; \
879 do { \ 1021 do { \
880 next_sym = strchr(this_sym, ','); \ 1022 next_sym = strchr(this_sym, ','); \
881 if (next_sym == NULL) \ 1023 if (next_sym == NULL) \
882 next_sym = this_sym + strlen(this_sym); \ 1024 next_sym = this_sym + strlen(this_sym); \
883 /* do we want a defined symbol ? */ \ 1025 /* do we want a defined symbol ? */ \
884 if (*this_sym == '+') { \ 1026 if (*this_sym == '+') { \
885 if (sym->st_shndx == SHN_UNDEF) \ 1027 if (sym->st_shndx == SHN_UNDEF) \
886 goto skip_this_sym##B; \ 1028 goto skip_this_sym##B; \
887 ++this_sym; \ 1029 ++this_sym; \
1030 ++this_sym_ver; \
888 /* do we want an undefined symbol ? */ \ 1031 /* do we want an undefined symbol ? */ \
889 } else if (*this_sym == '-') { \ 1032 } else if (*this_sym == '-') { \
890 if (sym->st_shndx != SHN_UNDEF) \ 1033 if (sym->st_shndx != SHN_UNDEF) \
891 goto skip_this_sym##B; \ 1034 goto skip_this_sym##B; \
892 ++this_sym; \ 1035 ++this_sym; \
1036 ++this_sym_ver; \
893 } \ 1037 } \
894 /* ok, lets compare the name now */ \ 1038 /* ok, lets compare the name now */ \
895 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \ 1039 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
896 (strcmp(symname, versioned_symname) == 0)) { \ 1040 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
897 if (be_semi_verbose) { \ 1041 if (be_semi_verbose) { \
898 char buf[126]; \ 1042 char buf[126]; \
899 snprintf(buf, sizeof(buf), "%lX %s %s", \ 1043 snprintf(buf, sizeof(buf), "%lX %s %s", \
900 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \ 1044 (unsigned long)sym->st_size, get_elfstttype(sym->st_info), this_sym); \
901 ret = buf; \ 1045 ret = buf; \
958/* scan an elf file and show all the fun stuff */ 1102/* scan an elf file and show all the fun stuff */
959#define prints(str) write(fileno(stdout), str, strlen(str)) 1103#define prints(str) write(fileno(stdout), str, strlen(str))
960static int scanelf_elfobj(elfobj *elf) 1104static int scanelf_elfobj(elfobj *elf)
961{ 1105{
962 unsigned long i; 1106 unsigned long i;
963 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1107 char found_pax, found_phdr, found_relro, found_load, found_textrel,
964 found_rpath, found_needed, found_interp, found_bind, found_soname, 1108 found_rpath, found_needed, found_interp, found_bind, found_soname,
965 found_sym, found_lib, found_file, found_textrels, found_section; 1109 found_sym, found_lib, found_file, found_textrels, found_section;
966 static char *out_buffer = NULL; 1110 static char *out_buffer = NULL;
967 static size_t out_len; 1111 static size_t out_len;
968 1112
969 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1113 found_pax = found_phdr = found_relro = found_load = found_textrel = \
978 printf("%s: scanning file\n", elf->filename); 1122 printf("%s: scanning file\n", elf->filename);
979 1123
980 /* init output buffer */ 1124 /* init output buffer */
981 if (!out_buffer) { 1125 if (!out_buffer) {
982 out_len = sizeof(char) * 80; 1126 out_len = sizeof(char) * 80;
983 out_buffer = (char*)xmalloc(out_len); 1127 out_buffer = xmalloc(out_len);
984 } 1128 }
985 *out_buffer = '\0'; 1129 *out_buffer = '\0';
986 1130
987 /* show the header */ 1131 /* show the header */
988 if (!be_quiet && show_banner) { 1132 if (!be_quiet && show_banner) {
999 case 'o': prints(" TYPE "); break; 1143 case 'o': prints(" TYPE "); break;
1000 case 'x': prints(" PAX "); break; 1144 case 'x': prints(" PAX "); break;
1001 case 'e': prints("STK/REL/PTL "); break; 1145 case 'e': prints("STK/REL/PTL "); break;
1002 case 't': prints("TEXTREL "); break; 1146 case 't': prints("TEXTREL "); break;
1003 case 'r': prints("RPATH "); break; 1147 case 'r': prints("RPATH "); break;
1148 case 'M': prints("CLASS "); break;
1004 case 'n': prints("NEEDED "); break; 1149 case 'n': prints("NEEDED "); break;
1005 case 'i': prints("INTERP "); break; 1150 case 'i': prints("INTERP "); break;
1006 case 'b': prints("BIND "); break; 1151 case 'b': prints("BIND "); break;
1007 case 'S': prints("SONAME "); break; 1152 case 'S': prints("SONAME "); break;
1008 case 's': prints("SYM "); break; 1153 case 's': prints("SYM "); break;
1009 case 'N': prints("LIB "); break; 1154 case 'N': prints("LIB "); break;
1010 case 'T': prints("TEXTRELS "); break; 1155 case 'T': prints("TEXTRELS "); break;
1011 case 'k': prints("SECTION "); break; 1156 case 'k': prints("SECTION "); break;
1157 case 'a': prints("ARCH "); break;
1158 case 'O': prints("PERM "); break;
1159 case 'D': prints("ENDIAN "); break;
1012 default: warnf("'%c' has no title ?", out_format[i]); 1160 default: warnf("'%c' has no title ?", out_format[i]);
1013 } 1161 }
1014 } 1162 }
1015 if (!found_file) prints("FILE "); 1163 if (!found_file) prints("FILE ");
1016 prints("\n"); 1164 prints("\n");
1066 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1214 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1067 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 1215 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
1068 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1216 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1069 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break; 1217 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
1070 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 1218 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
1219 case 'M': out = get_elfeitype(EI_CLASS, elf->data[EI_CLASS]); break;
1220 case 'D': out = get_endian(elf); break;
1221 case 'O': out = getstr_perms(elf->filename); break;
1071 case 'n': 1222 case 'n':
1072 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break; 1223 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
1073 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1224 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1074 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1225 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1075 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1226 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1076 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1227 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1077 case 'k': out = scanelf_file_sections(elf, &found_section); break; 1228 case 'k': out = scanelf_file_sections(elf, &found_section); break;
1229 case 'a': out = get_elfemtype(elf); break;
1078 default: warnf("'%c' has no scan code?", out_format[i]); 1230 default: warnf("'%c' has no scan code?", out_format[i]);
1079 } 1231 }
1080 if (out) { 1232 if (out) {
1081 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */ 1233 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1082 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL) 1234 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1128 if (strlen(match_etypes)) { 1280 if (strlen(match_etypes)) {
1129 char sbuf[126]; 1281 char sbuf[126];
1130 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1282 strncpy(sbuf, match_etypes, sizeof(sbuf));
1131 if (strchr(match_etypes, ',') != NULL) { 1283 if (strchr(match_etypes, ',') != NULL) {
1132 char *p; 1284 char *p;
1133 while((p = strrchr(sbuf, ',')) != NULL) { 1285 while ((p = strrchr(sbuf, ',')) != NULL) {
1134 *p = 0; 1286 *p = 0;
1135 if (etype_lookup(p+1) == get_etype(elf)) 1287 if (etype_lookup(p+1) == get_etype(elf))
1136 goto label_ret; 1288 goto label_ret;
1137 } 1289 }
1138 } 1290 }
1171 munmap(ar_buffer, len); 1323 munmap(ar_buffer, len);
1172 1324
1173 return 0; 1325 return 0;
1174} 1326}
1175/* scan a file which may be an elf or an archive or some other magical beast */ 1327/* scan a file which may be an elf or an archive or some other magical beast */
1176static void scanelf_file(const char *filename) 1328static int scanelf_file(const char *filename, const struct stat *st_cache)
1177{ 1329{
1330 const struct stat *st = st_cache;
1178 struct stat st; 1331 struct stat symlink_st;
1179 int fd; 1332 int fd;
1180 1333
1181 /* make sure 'filename' exists */
1182 if (lstat(filename, &st) == -1) {
1183 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1184 return;
1185 }
1186
1187 /* always handle regular files and handle symlinked files if no -y */ 1334 /* always handle regular files and handle symlinked files if no -y */
1188 if (S_ISLNK(st.st_mode)) { 1335 if (S_ISLNK(st->st_mode)) {
1189 if (!scan_symlink) return; 1336 if (!scan_symlink) return 1;
1190 stat(filename, &st); 1337 stat(filename, &symlink_st);
1338 st = &symlink_st;
1191 } 1339 }
1340
1192 if (!S_ISREG(st.st_mode)) { 1341 if (!S_ISREG(st->st_mode)) {
1193 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1342 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1194 return; 1343 return 1;
1195 } 1344 }
1196 1345
1346 if (match_perms) {
1347 if ((st->st_mode | match_perms) != st->st_mode)
1348 return 1;
1349 }
1197 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1350 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1198 return; 1351 return 1;
1199 1352
1200 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives) 1353 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1201 /* if it isn't an ELF, maybe it's an .a archive */ 1354 /* if it isn't an ELF, maybe it's an .a archive */
1202 scanelf_archive(filename, fd, st.st_size); 1355 scanelf_archive(filename, fd, st->st_size);
1203 1356
1204 close(fd); 1357 close(fd);
1358 return 0;
1205} 1359}
1206 1360
1207/* scan a directory for ET_EXEC files and print when we find one */ 1361/* scan a directory for ET_EXEC files and print when we find one */
1208static void scanelf_dir(const char *path) 1362static int scanelf_dir(const char *path)
1209{ 1363{
1210 register DIR *dir; 1364 register DIR *dir;
1211 register struct dirent *dentry; 1365 register struct dirent *dentry;
1212 struct stat st_top, st; 1366 struct stat st_top, st;
1213 char buf[__PAX_UTILS_PATH_MAX]; 1367 char buf[__PAX_UTILS_PATH_MAX];
1214 size_t pathlen = 0, len = 0; 1368 size_t pathlen = 0, len = 0;
1369 int ret = 0;
1215 1370
1216 /* make sure path exists */ 1371 /* make sure path exists */
1217 if (lstat(path, &st_top) == -1) { 1372 if (lstat(path, &st_top) == -1) {
1218 if (be_verbose > 2) printf("%s: does not exist\n", path); 1373 if (be_verbose > 2) printf("%s: does not exist\n", path);
1219 return; 1374 return 1;
1220 } 1375 }
1221 1376
1222 /* ok, if it isn't a directory, assume we can open it */ 1377 /* ok, if it isn't a directory, assume we can open it */
1223 if (!S_ISDIR(st_top.st_mode)) { 1378 if (!S_ISDIR(st_top.st_mode)) {
1224 scanelf_file(path); 1379 return scanelf_file(path, &st_top);
1225 return;
1226 } 1380 }
1227 1381
1228 /* now scan the dir looking for fun stuff */ 1382 /* now scan the dir looking for fun stuff */
1229 if ((dir = opendir(path)) == NULL) { 1383 if ((dir = opendir(path)) == NULL) {
1230 warnf("could not opendir %s: %s", path, strerror(errno)); 1384 warnf("could not opendir %s: %s", path, strerror(errno));
1231 return; 1385 return 1;
1232 } 1386 }
1233 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1387 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1234 1388
1235 pathlen = strlen(path); 1389 pathlen = strlen(path);
1236 while ((dentry = readdir(dir))) { 1390 while ((dentry = readdir(dir))) {
1240 if (len >= sizeof(buf)) { 1394 if (len >= sizeof(buf)) {
1241 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1395 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1242 (unsigned long)len, (unsigned long)sizeof(buf)); 1396 (unsigned long)len, (unsigned long)sizeof(buf));
1243 continue; 1397 continue;
1244 } 1398 }
1245 sprintf(buf, "%s/%s", path, dentry->d_name); 1399 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1246 if (lstat(buf, &st) != -1) { 1400 if (lstat(buf, &st) != -1) {
1247 if (S_ISREG(st.st_mode)) 1401 if (S_ISREG(st.st_mode))
1248 scanelf_file(buf); 1402 ret = scanelf_file(buf, &st);
1249 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1403 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1250 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1404 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1251 scanelf_dir(buf); 1405 ret = scanelf_dir(buf);
1252 } 1406 }
1253 } 1407 }
1254 } 1408 }
1255 closedir(dir); 1409 closedir(dir);
1410 return ret;
1256} 1411}
1257 1412
1258static int scanelf_from_file(const char *filename) 1413static int scanelf_from_file(const char *filename)
1259{ 1414{
1260 FILE *fp = NULL; 1415 FILE *fp = NULL;
1261 char *p; 1416 char *p;
1262 char path[__PAX_UTILS_PATH_MAX]; 1417 char path[__PAX_UTILS_PATH_MAX];
1418 int ret = 0;
1263 1419
1264 if (strcmp(filename, "-") == 0) 1420 if (strcmp(filename, "-") == 0)
1265 fp = stdin; 1421 fp = stdin;
1266 else if ((fp = fopen(filename, "r")) == NULL) 1422 else if ((fp = fopen(filename, "r")) == NULL)
1267 return 1; 1423 return 1;
1268 1424
1269 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1425 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1270 if ((p = strchr(path, '\n')) != NULL) 1426 if ((p = strchr(path, '\n')) != NULL)
1271 *p = 0; 1427 *p = 0;
1272 search_path = path; 1428 search_path = path;
1273 scanelf_dir(path); 1429 ret = scanelf_dir(path);
1274 } 1430 }
1275 if (fp != stdin) 1431 if (fp != stdin)
1276 fclose(fp); 1432 fclose(fp);
1277 return 0; 1433 return ret;
1278} 1434}
1279 1435
1436#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1437
1280static int load_ld_so_conf(int i, const char *fname) 1438static int load_ld_cache_config(int i, const char *fname)
1281{ 1439{
1282 FILE *fp = NULL; 1440 FILE *fp = NULL;
1283 char *p; 1441 char *p;
1284 char path[__PAX_UTILS_PATH_MAX]; 1442 char path[__PAX_UTILS_PATH_MAX];
1285 1443
1286 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1444 if (i + 1 == ARRAY_SIZE(ldpaths))
1287 return i; 1445 return i;
1288 1446
1289 if ((fp = fopen(fname, "r")) == NULL) 1447 if ((fp = fopen(fname, "r")) == NULL)
1290 return i; 1448 return i;
1291 1449
1293 if ((p = strrchr(path, '\r')) != NULL) 1451 if ((p = strrchr(path, '\r')) != NULL)
1294 *p = 0; 1452 *p = 0;
1295 if ((p = strchr(path, '\n')) != NULL) 1453 if ((p = strchr(path, '\n')) != NULL)
1296 *p = 0; 1454 *p = 0;
1297#ifdef __linux__ 1455#ifdef __linux__
1298 // recursive includes of the same file will make this segfault. 1456 /* recursive includes of the same file will make this segfault. */
1299 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1457 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1300 glob64_t gl; 1458 glob64_t gl;
1301 size_t x; 1459 size_t x;
1302 char gpath[__PAX_UTILS_PATH_MAX]; 1460 char gpath[__PAX_UTILS_PATH_MAX];
1303 1461
1311 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1469 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1312 for (x = 0; x < gl.gl_pathc; ++x) { 1470 for (x = 0; x < gl.gl_pathc; ++x) {
1313 /* try to avoid direct loops */ 1471 /* try to avoid direct loops */
1314 if (strcmp(gl.gl_pathv[x], fname) == 0) 1472 if (strcmp(gl.gl_pathv[x], fname) == 0)
1315 continue; 1473 continue;
1316 i = load_ld_so_conf(i, gl.gl_pathv[x]); 1474 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1317 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) { 1475 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1318 globfree64(&gl); 1476 globfree64(&gl);
1319 return i; 1477 return i;
1320 } 1478 }
1321 } 1479 }
1322 globfree64 (&gl); 1480 globfree64 (&gl);
1323 continue; 1481 continue;
1324 } else 1482 }
1325 abort();
1326 } 1483 }
1327#endif 1484#endif
1328 if (*path != '/') 1485 if (*path != '/')
1329 continue; 1486 continue;
1330 1487
1331 ldpaths[i++] = xstrdup(path); 1488 ldpaths[i++] = xstrdup(path);
1332 1489
1333 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1490 if (i + 1 == ARRAY_SIZE(ldpaths))
1334 break; 1491 break;
1335 } 1492 }
1336 ldpaths[i] = NULL; 1493 ldpaths[i] = NULL;
1337 1494
1338 fclose(fp); 1495 fclose(fp);
1339 return i; 1496 return i;
1340} 1497}
1341 1498
1499#elif defined(__FreeBSD__) || (__DragonFly__)
1500
1501static int load_ld_cache_config(int i, const char *fname)
1502{
1503 FILE *fp = NULL;
1504 char *b = NULL, *p;
1505 struct elfhints_hdr hdr;
1506
1507 if (i + 1 == ARRAY_SIZE(ldpaths))
1508 return i;
1509
1510 if ((fp = fopen(fname, "r")) == NULL)
1511 return i;
1512
1513 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1514 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1515 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1516 {
1517 fclose(fp);
1518 return i;
1519 }
1520
1521 b = xmalloc(hdr.dirlistlen + 1);
1522 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1523 fclose(fp);
1524 free(b);
1525 return i;
1526 }
1527
1528 while ((p = strsep(&b, ":"))) {
1529 if (*p == '\0') continue;
1530 ldpaths[i++] = xstrdup(p);
1531
1532 if (i + 1 == ARRAY_SIZE(ldpaths))
1533 break;
1534 }
1535 ldpaths[i] = NULL;
1536
1537 free(b);
1538 fclose(fp);
1539 return i;
1540}
1541
1542#else
1543
1544#warning Cache config support not implemented for your target
1545static int load_ld_cache_config(int i, const char *fname)
1546{
1547 memset(ldpaths, 0x00, sizeof(ldpaths));
1548}
1549
1550#endif
1551
1342/* scan /etc/ld.so.conf for paths */ 1552/* scan /etc/ld.so.conf for paths */
1343static void scanelf_ldpath() 1553static void scanelf_ldpath(void)
1344{ 1554{
1345 char scan_l, scan_ul, scan_ull; 1555 char scan_l, scan_ul, scan_ull;
1346 int i = 0; 1556 int i = 0;
1347 1557
1348 if (!ldpaths[0]) 1558 if (!ldpaths[0])
1362 if (!scan_ul) scanelf_dir("/usr/lib"); 1572 if (!scan_ul) scanelf_dir("/usr/lib");
1363 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1573 if (!scan_ull) scanelf_dir("/usr/local/lib");
1364} 1574}
1365 1575
1366/* scan env PATH for paths */ 1576/* scan env PATH for paths */
1367static void scanelf_envpath() 1577static void scanelf_envpath(void)
1368{ 1578{
1369 char *path, *p; 1579 char *path, *p;
1370 1580
1371 path = getenv("PATH"); 1581 path = getenv("PATH");
1372 if (!path) 1582 if (!path)
1379 } 1589 }
1380 1590
1381 free(path); 1591 free(path);
1382} 1592}
1383 1593
1384/* usage / invocation handling functions */ 1594
1595/* usage / invocation handling functions */ /* Free Flags: c d j u w C G H I J K P Q U W Y Z */
1385#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:BhV" 1596#define PARSE_FLAGS "plRmyAXz:xetrnLibSs:k:gN:TaqvF:f:o:E:M:DO:BhV"
1386#define a_argument required_argument 1597#define a_argument required_argument
1387static struct option const long_opts[] = { 1598static struct option const long_opts[] = {
1388 {"path", no_argument, NULL, 'p'}, 1599 {"path", no_argument, NULL, 'p'},
1389 {"ldpath", no_argument, NULL, 'l'}, 1600 {"ldpath", no_argument, NULL, 'l'},
1390 {"recursive", no_argument, NULL, 'R'}, 1601 {"recursive", no_argument, NULL, 'R'},
1407 {"lib", a_argument, NULL, 'N'}, 1618 {"lib", a_argument, NULL, 'N'},
1408 {"gmatch", no_argument, NULL, 'g'}, 1619 {"gmatch", no_argument, NULL, 'g'},
1409 {"textrels", no_argument, NULL, 'T'}, 1620 {"textrels", no_argument, NULL, 'T'},
1410 {"etype", a_argument, NULL, 'E'}, 1621 {"etype", a_argument, NULL, 'E'},
1411 {"bits", a_argument, NULL, 'M'}, 1622 {"bits", a_argument, NULL, 'M'},
1623 {"endian", no_argument, NULL, 'D'},
1624 {"perms", a_argument, NULL, 'O'},
1412 {"all", no_argument, NULL, 'a'}, 1625 {"all", no_argument, NULL, 'a'},
1413 {"quiet", no_argument, NULL, 'q'}, 1626 {"quiet", no_argument, NULL, 'q'},
1414 {"verbose", no_argument, NULL, 'v'}, 1627 {"verbose", no_argument, NULL, 'v'},
1415 {"format", a_argument, NULL, 'F'}, 1628 {"format", a_argument, NULL, 'F'},
1416 {"from", a_argument, NULL, 'f'}, 1629 {"from", a_argument, NULL, 'f'},
1444 "Find a specified library", 1657 "Find a specified library",
1445 "Use strncmp to match libraries. (use with -N)", 1658 "Use strncmp to match libraries. (use with -N)",
1446 "Locate cause of TEXTREL", 1659 "Locate cause of TEXTREL",
1447 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1660 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1448 "Print only ELF files matching numeric bits", 1661 "Print only ELF files matching numeric bits",
1662 "Print Endianness",
1663 "Print only ELF files matching octal permissions",
1449 "Print all scanned info (-x -e -t -r -b)\n", 1664 "Print all scanned info (-x -e -t -r -b)\n",
1450 "Only output 'bad' things", 1665 "Only output 'bad' things",
1451 "Be verbose (can be specified more than once)", 1666 "Be verbose (can be specified more than once)",
1452 "Use specified format for output", 1667 "Use specified format for output",
1453 "Read input stream from a filename", 1668 "Read input stream from a filename",
1465 printf("* Scan ELF binaries for stuff\n\n" 1680 printf("* Scan ELF binaries for stuff\n\n"
1466 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0); 1681 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1467 printf("Options: -[%s]\n", PARSE_FLAGS); 1682 printf("Options: -[%s]\n", PARSE_FLAGS);
1468 for (i = 0; long_opts[i].name; ++i) 1683 for (i = 0; long_opts[i].name; ++i)
1469 if (long_opts[i].has_arg == no_argument) 1684 if (long_opts[i].has_arg == no_argument)
1470 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1685 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1471 long_opts[i].name, opts_help[i]); 1686 long_opts[i].name, opts_help[i]);
1472 else 1687 else
1473 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1688 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1474 long_opts[i].name, opts_help[i]); 1689 long_opts[i].name, opts_help[i]);
1475 1690
1476 if (status != EXIT_SUCCESS) 1691 puts("\nFor more information, see the scanelf(1) manpage");
1477 exit(status);
1478
1479 puts("\nThe format modifiers for the -F option are:");
1480 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1481 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1482 puts(" i INTERP \tb BIND \ts symbol");
1483 puts(" N library \to Type \tT TEXTRELs");
1484 puts(" S SONAME \tk section");
1485 puts(" p filename (with search path removed)");
1486 puts(" f filename (short name/basename)");
1487 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1488
1489 puts("\nELF Etypes:");
1490 print_etypes(stdout);
1491
1492 exit(status); 1692 exit(status);
1493} 1693}
1494 1694
1495/* parse command line arguments and preform needed actions */ 1695/* parse command line arguments and preform needed actions */
1696#define do_pax_state(option, flag) \
1697 if (islower(option)) { \
1698 flags &= ~PF_##flag; \
1699 flags |= PF_NO##flag; \
1700 } else { \
1701 flags &= ~PF_NO##flag; \
1702 flags |= PF_##flag; \
1703 }
1496static void parseargs(int argc, char *argv[]) 1704static int parseargs(int argc, char *argv[])
1497{ 1705{
1498 int i; 1706 int i;
1499 const char *from_file = NULL; 1707 const char *from_file = NULL;
1708 int ret = 0;
1500 1709
1501 opterr = 0; 1710 opterr = 0;
1502 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1711 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1503 switch (i) { 1712 switch (i) {
1504 1713
1516 case 'E': 1725 case 'E':
1517 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1726 strncpy(match_etypes, optarg, sizeof(match_etypes));
1518 break; 1727 break;
1519 case 'M': 1728 case 'M':
1520 match_bits = atoi(optarg); 1729 match_bits = atoi(optarg);
1730 if (match_bits == 0) {
1731 if (strcmp(optarg, "ELFCLASS32") == 0)
1732 match_bits = 32;
1733 if (strcmp(optarg, "ELFCLASS64") == 0)
1734 match_bits = 64;
1735 }
1736 break;
1737 case 'O':
1738 if (sscanf(optarg, "%o", &match_perms) == (-1))
1739 match_bits = 0;
1521 break; 1740 break;
1522 case 'o': { 1741 case 'o': {
1523 FILE *fp = NULL;
1524 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1742 if (freopen(optarg, "w", stdout) == NULL)
1525 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1743 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1526 SET_STDOUT(fp);
1527 break; 1744 break;
1528 } 1745 }
1529 case 'k': 1746 case 'k':
1530 if (find_section) warn("You prob don't want to specify -k twice"); 1747 if (find_section) warn("You prob don't want to specify -k twice");
1531 find_section = optarg; 1748 find_section = optarg;
1532 break; 1749 break;
1533 case 's': { 1750 case 's': {
1534 if (find_sym) warn("You prob don't want to specify -s twice"); 1751 if (find_sym) warn("You prob don't want to specify -s twice");
1535 find_sym = optarg; 1752 find_sym = optarg;
1536 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1)); 1753 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1537 sprintf(versioned_symname, "%s@", find_sym); 1754 sprintf(versioned_symname, "%s@", find_sym);
1538 break; 1755 break;
1539 } 1756 }
1540 case 'N': { 1757 case 'N': {
1541 if (find_lib) warn("You prob don't want to specify -N twice"); 1758 if (find_lib) warn("You prob don't want to specify -N twice");
1550 } 1767 }
1551 case 'z': { 1768 case 'z': {
1552 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1769 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1553 size_t x; 1770 size_t x;
1554 1771
1555 for (x = 0 ; x < strlen(optarg); x++) { 1772 for (x = 0; x < strlen(optarg); x++) {
1556 switch(optarg[x]) { 1773 switch (optarg[x]) {
1557 case 'p': 1774 case 'p':
1558 case 'P': 1775 case 'P':
1559 do_state(optarg[x], PAGEEXEC); 1776 do_pax_state(optarg[x], PAGEEXEC);
1560 break; 1777 break;
1561 case 's': 1778 case 's':
1562 case 'S': 1779 case 'S':
1563 do_state(optarg[x], SEGMEXEC); 1780 do_pax_state(optarg[x], SEGMEXEC);
1564 break; 1781 break;
1565 case 'm': 1782 case 'm':
1566 case 'M': 1783 case 'M':
1567 do_state(optarg[x], MPROTECT); 1784 do_pax_state(optarg[x], MPROTECT);
1568 break; 1785 break;
1569 case 'e': 1786 case 'e':
1570 case 'E': 1787 case 'E':
1571 do_state(optarg[x], EMUTRAMP); 1788 do_pax_state(optarg[x], EMUTRAMP);
1572 break; 1789 break;
1573 case 'r': 1790 case 'r':
1574 case 'R': 1791 case 'R':
1575 do_state(optarg[x], RANDMMAP); 1792 do_pax_state(optarg[x], RANDMMAP);
1576 break; 1793 break;
1577 case 'x': 1794 case 'x':
1578 case 'X': 1795 case 'X':
1579 do_state(optarg[x], RANDEXEC); 1796 do_pax_state(optarg[x], RANDEXEC);
1580 break; 1797 break;
1581 default: 1798 default:
1582 break; 1799 break;
1583 } 1800 }
1584 } 1801 }
1589 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1806 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1590 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1807 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1591 setpax = flags; 1808 setpax = flags;
1592 break; 1809 break;
1593 } 1810 }
1594 case 'g': gmatch = 1; break; 1811 case 'g': g_match = 1; break;
1595 case 'L': use_ldcache = 1; break; 1812 case 'L': use_ldcache = 1; break;
1596 case 'y': scan_symlink = 0; break; 1813 case 'y': scan_symlink = 0; break;
1597 case 'A': scan_archives = 1; break; 1814 case 'A': scan_archives = 1; break;
1598 case 'B': show_banner = 0; break; 1815 case 'B': show_banner = 0; break;
1599 case 'l': scan_ldpath = 1; break; 1816 case 'l': scan_ldpath = 1; break;
1610 case 'b': show_bind = 1; break; 1827 case 'b': show_bind = 1; break;
1611 case 'S': show_soname = 1; break; 1828 case 'S': show_soname = 1; break;
1612 case 'T': show_textrels = 1; break; 1829 case 'T': show_textrels = 1; break;
1613 case 'q': be_quiet = 1; break; 1830 case 'q': be_quiet = 1; break;
1614 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1831 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1615 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 1832 case 'a': show_perms = show_pax = show_phdr = show_textrel = show_rpath = show_bind = show_endian = 1; break;
1616 1833 case 'D': show_endian = 1; break;
1617 case ':': 1834 case ':':
1618 err("Option '%c' is missing parameter", optopt); 1835 err("Option '%c' is missing parameter", optopt);
1619 case '?': 1836 case '?':
1620 err("Unknown option '%c' or argument missing", optopt); 1837 err("Unknown option '%c' or argument missing", optopt);
1621 default: 1838 default:
1622 err("Unhandled option '%c'; please report this", i); 1839 err("Unhandled option '%c'; please report this", i);
1623 } 1840 }
1624 } 1841 }
1625 1842 if (show_textrels && be_verbose) {
1843 if (which("objdump") != NULL)
1844 has_objdump = 1;
1845 }
1626 /* let the format option override all other options */ 1846 /* let the format option override all other options */
1627 if (out_format) { 1847 if (out_format) {
1628 show_pax = show_phdr = show_textrel = show_rpath = \ 1848 show_pax = show_phdr = show_textrel = show_rpath = \
1629 show_needed = show_interp = show_bind = show_soname = \ 1849 show_needed = show_interp = show_bind = show_soname = \
1630 show_textrels = 0; 1850 show_textrels = show_perms = show_endian = 0;
1631 for (i = 0; out_format[i]; ++i) { 1851 for (i = 0; out_format[i]; ++i) {
1632 if (!IS_MODIFIER(out_format[i])) continue; 1852 if (!IS_MODIFIER(out_format[i])) continue;
1633 1853
1634 switch (out_format[++i]) { 1854 switch (out_format[++i]) {
1635 case '+': break; 1855 case '+': break;
1640 case 'f': break; 1860 case 'f': break;
1641 case 'k': break; 1861 case 'k': break;
1642 case 's': break; 1862 case 's': break;
1643 case 'N': break; 1863 case 'N': break;
1644 case 'o': break; 1864 case 'o': break;
1865 case 'a': break;
1866 case 'M': break;
1867 case 'D': show_endian = 1; break;
1868 case 'O': show_perms = 1; break;
1645 case 'x': show_pax = 1; break; 1869 case 'x': show_pax = 1; break;
1646 case 'e': show_phdr = 1; break; 1870 case 'e': show_phdr = 1; break;
1647 case 't': show_textrel = 1; break; 1871 case 't': show_textrel = 1; break;
1648 case 'r': show_rpath = 1; break; 1872 case 'r': show_rpath = 1; break;
1649 case 'n': show_needed = 1; break; 1873 case 'n': show_needed = 1; break;
1650 case 'i': show_interp = 1; break; 1874 case 'i': show_interp = 1; break;
1651 case 'b': show_bind = 1; break; 1875 case 'b': show_bind = 1; break;
1652 case 'S': show_soname = 1; break; 1876 case 'S': show_soname = 1; break;
1653 case 'T': show_textrels = 1; break; 1877 case 'T': show_textrels = 1; break;
1654 default: 1878 default:
1655 err("Invalid format specifier '%c' (byte %i)", 1879 err("Invalid format specifier '%c' (byte %i)",
1656 out_format[i], i+1); 1880 out_format[i], i+1);
1657 } 1881 }
1658 } 1882 }
1659 1883
1660 /* construct our default format */ 1884 /* construct our default format */
1661 } else { 1885 } else {
1662 size_t fmt_len = 30; 1886 size_t fmt_len = 30;
1663 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1887 out_format = xmalloc(sizeof(char) * fmt_len);
1664 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1888 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1665 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1889 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1890 if (show_perms) xstrcat(&out_format, "%O ", &fmt_len);
1891 if (show_endian) xstrcat(&out_format, "%D ", &fmt_len);
1666 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 1892 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1667 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1893 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1668 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1894 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1669 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1895 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1670 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1896 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1678 } 1904 }
1679 if (be_verbose > 2) printf("Format: %s\n", out_format); 1905 if (be_verbose > 2) printf("Format: %s\n", out_format);
1680 1906
1681 /* now lets actually do the scanning */ 1907 /* now lets actually do the scanning */
1682 if (scan_ldpath || use_ldcache) 1908 if (scan_ldpath || use_ldcache)
1683 load_ld_so_conf(0, "/etc/ld.so.conf"); 1909 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1684 if (scan_ldpath) scanelf_ldpath(); 1910 if (scan_ldpath) scanelf_ldpath();
1685 if (scan_envpath) scanelf_envpath(); 1911 if (scan_envpath) scanelf_envpath();
1686 if (!from_file && optind == argc && ttyname(0) == NULL) 1912 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1687 from_file = "-"; 1913 from_file = "-";
1688 if (from_file) { 1914 if (from_file) {
1689 scanelf_from_file(from_file); 1915 scanelf_from_file(from_file);
1690 from_file = *argv; 1916 from_file = *argv;
1691 } 1917 }
1692 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1918 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1693 err("Nothing to scan !?"); 1919 err("Nothing to scan !?");
1694 while (optind < argc) { 1920 while (optind < argc) {
1695 search_path = argv[optind++]; 1921 search_path = argv[optind++];
1696 scanelf_dir(search_path); 1922 ret = scanelf_dir(search_path);
1697 } 1923 }
1698 1924
1699 /* clean up */ 1925 /* clean up */
1700 if (versioned_symname) free(versioned_symname); 1926 free(versioned_symname);
1701 for (i = 0; ldpaths[i]; ++i) 1927 for (i = 0; ldpaths[i]; ++i)
1702 free(ldpaths[i]); 1928 free(ldpaths[i]);
1703 1929
1704 if (ldcache != 0) 1930 if (ldcache != 0)
1705 munmap(ldcache, ldcache_size); 1931 munmap(ldcache, ldcache_size);
1706}
1707
1708
1709
1710/* utility funcs */
1711static char *xstrdup(const char *s)
1712{
1713 char *ret = strdup(s);
1714 if (!ret) err("Could not strdup(): %s", strerror(errno));
1715 return ret; 1932 return ret;
1716} 1933}
1717static void *xmalloc(size_t size)
1718{
1719 void *ret = malloc(size);
1720 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1721 return ret;
1722}
1723static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1724{
1725 size_t new_len;
1726 1934
1727 new_len = strlen(*dst) + strlen(src); 1935static char **get_split_env(const char *envvar)
1728 if (*curr_len <= new_len) {
1729 *curr_len = new_len + (*curr_len / 2);
1730 *dst = realloc(*dst, *curr_len);
1731 if (!*dst)
1732 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1733 }
1734
1735 if (n)
1736 strncat(*dst, src, n);
1737 else
1738 strcat(*dst, src);
1739}
1740static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1741{ 1936{
1742 static char my_app[2]; 1937 const char *delims = " \t\n";
1743 my_app[0] = append; 1938 char **envvals = NULL;
1744 my_app[1] = '\0'; 1939 char *env, *s;
1745 xstrcat(dst, my_app, curr_len); 1940 int nentry;
1746}
1747 1941
1942 if ((env = getenv(envvar)) == NULL)
1943 return NULL;
1944
1945 env = xstrdup(env);
1946 if (env == NULL)
1947 return NULL;
1948
1949 s = strtok(env, delims);
1950 if (s == NULL) {
1951 free(env);
1952 return NULL;
1953 }
1954
1955 nentry = 0;
1956 while (s != NULL) {
1957 ++nentry;
1958 envvals = xrealloc(envvals, sizeof(*envvals) * (nentry+1));
1959 envvals[nentry-1] = s;
1960 s = strtok(NULL, delims);
1961 }
1962 envvals[nentry] = NULL;
1963
1964 /* don't want to free(env) as it contains the memory that backs
1965 * the envvals array of strings */
1966 return envvals;
1967}
1968
1969static void parseenv(void)
1970{
1971 qa_textrels = get_split_env("QA_TEXTRELS");
1972 qa_execstack = get_split_env("QA_EXECSTACK");
1973 qa_wx_load = get_split_env("QA_WX_LOAD");
1974}
1975
1976#ifdef __PAX_UTILS_CLEANUP
1977static void cleanup(void)
1978{
1979 free(out_format);
1980 free(qa_textrels);
1981 free(qa_execstack);
1982 free(qa_wx_load);
1983}
1984#endif
1748 1985
1749 1986
1750int main(int argc, char *argv[]) 1987int main(int argc, char *argv[])
1751{ 1988{
1989 int ret;
1752 if (argc < 2) 1990 if (argc < 2)
1753 usage(EXIT_FAILURE); 1991 usage(EXIT_FAILURE);
1992 parseenv();
1754 parseargs(argc, argv); 1993 ret = parseargs(argc, argv);
1755 fclose(stdout); 1994 fclose(stdout);
1756#ifdef __BOUNDS_CHECKING_ON 1995#ifdef __PAX_UTILS_CLEANUP
1757 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 1996 cleanup();
1997 warn("The calls to add/delete heap should be off:\n"
1998 "\t- 1 due to the out_buffer not being freed in scanelf_file()\n"
1999 "\t- 1 per QA_TEXTRELS/QA_EXECSTACK/QA_WX_LOAD");
1758#endif 2000#endif
1759 return EXIT_SUCCESS; 2001 return ret;
1760} 2002}
2003
2004
2005/* Match filename against entries in matchlist, return TRUE
2006 * if the file is listed */
2007static int file_matches_list(const char *filename, char **matchlist)
2008{
2009 char **file;
2010 char *match;
2011 char buf[__PAX_UTILS_PATH_MAX];
2012
2013 if (matchlist == NULL)
2014 return 0;
2015
2016 for (file = matchlist; *file != NULL; file++) {
2017 if (search_path) {
2018 snprintf(buf, sizeof(buf), "%s%s", search_path, *file);
2019 match = buf;
2020 } else {
2021 match = *file;
2022 }
2023 if (fnmatch(match, filename, 0) == 0)
2024 return 1;
2025 }
2026 return 0;
2027}

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