/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.141 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 1.141 2006/04/23 15:24:38 flameeyes 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 $";
11const char * const argv0 = "scanelf";
12
10#include "paxinc.h" 13#include "paxinc.h"
11#if defined(__GLIBC__) || defined(__UCLIBC__)
12 #include <glob.h>
13#endif
14#if defined(__FreeBSD__) || defined(__DragonFly__)
15 #include <elf-hints.h>
16#endif
17
18static const char *rcsid = "$Id: scanelf.c,v 1.141 2006/04/23 15:24:38 flameeyes Exp $";
19#define argv0 "scanelf"
20 14
21#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+') 15#define IS_MODIFIER(c) (c == '%' || c == '#' || c == '+')
22 16
23#define do_state(option, flag) \
24 if (islower(option)) { \
25 flags &= ~PF_##flag; \
26 flags |= PF_NO##flag; \
27 } else { \
28 flags &= ~PF_NO##flag; \
29 flags |= PF_##flag; \
30 }
31
32
33/* prototypes */ 17/* prototypes */
18static int file_matches_list(const char *filename, char **matchlist);
34static int scanelf_elfobj(elfobj *elf); 19static int scanelf_elfobj(elfobj *elf);
35static int scanelf_elf(const char *filename, int fd, size_t len); 20static int scanelf_elf(const char *filename, int fd, size_t len);
36static int scanelf_archive(const char *filename, int fd, size_t len); 21static int scanelf_archive(const char *filename, int fd, size_t len);
37static void scanelf_file(const char *filename); 22static int scanelf_file(const char *filename, const struct stat *st_cache);
38static void scanelf_dir(const char *path); 23static int scanelf_dir(const char *path);
39static void scanelf_ldpath(void); 24static void scanelf_ldpath(void);
40static void scanelf_envpath(void); 25static void scanelf_envpath(void);
41static void usage(int status); 26static void usage(int status);
27static char **get_split_env(const char *envvar);
28static void parseenv(void);
42static void parseargs(int argc, char *argv[]); 29static int parseargs(int argc, char *argv[]);
43static char *xstrdup(const char *s); 30static int rematch(const char *regex, const char *match, int cflags);
44static void *xmalloc(size_t size);
45static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
46#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
47static inline void xchrcat(char **dst, const char append, size_t *curr_len);
48 31
49/* variables to control behavior */ 32/* variables to control behavior */
50static char match_etypes[126] = ""; 33static char match_etypes[126] = "";
51static char *ldpaths[256]; 34static char *ldpaths[256];
52static char scan_ldpath = 0; 35static char scan_ldpath = 0;
54static char scan_symlink = 1; 37static char scan_symlink = 1;
55static char scan_archives = 0; 38static char scan_archives = 0;
56static char dir_recurse = 0; 39static char dir_recurse = 0;
57static char dir_crossmount = 1; 40static char dir_crossmount = 1;
58static char show_pax = 0; 41static char show_pax = 0;
42static char show_perms = 0;
59static char show_phdr = 0; 43static char show_phdr = 0;
60static char show_textrel = 0; 44static char show_textrel = 0;
61static char show_rpath = 0; 45static char show_rpath = 0;
62static char show_needed = 0; 46static char show_needed = 0;
63static char show_interp = 0; 47static char show_interp = 0;
64static char show_bind = 0; 48static char show_bind = 0;
65static char show_soname = 0; 49static char show_soname = 0;
66static char show_textrels = 0; 50static char show_textrels = 0;
67static char show_banner = 1; 51static char show_banner = 1;
52static char show_endian = 0;
68static char be_quiet = 0; 53static char be_quiet = 0;
69static char be_verbose = 0; 54static char be_verbose = 0;
70static char be_wewy_wewy_quiet = 0; 55static char be_wewy_wewy_quiet = 0;
71static char be_semi_verbose = 0; 56static char be_semi_verbose = 0;
72static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
73static char *find_lib = NULL; 58static char *find_lib = NULL;
74static char *find_section = NULL; 59static char *find_section = NULL;
75static char *out_format = NULL; 60static char *out_format = NULL;
76static char *search_path = NULL; 61static char *search_path = NULL;
77static char fix_elf = 0; 62static char fix_elf = 0;
78static char gmatch = 0; 63static char g_match = 0;
79static char use_ldcache = 0; 64static char use_ldcache = 0;
80 65
66static char **qa_textrels = NULL;
67static char **qa_execstack = NULL;
68static char **qa_wx_load = NULL;
69
81int match_bits = 0; 70int match_bits = 0;
71unsigned int match_perms = 0;
82caddr_t ldcache = 0; 72caddr_t ldcache = 0;
83size_t ldcache_size = 0; 73size_t ldcache_size = 0;
84unsigned 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}
85 140
86/* sub-funcs for scanelf_file() */ 141/* sub-funcs for scanelf_file() */
87static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 142static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
88{ 143{
89 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 144 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
197 uint32_t flags, check_flags; \ 252 uint32_t flags, check_flags; \
198 if (elf->phdr != NULL) { \ 253 if (elf->phdr != NULL) { \
199 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 254 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
200 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \ 255 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
201 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 256 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
257 if (multi_stack++) \
202 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; \
203 found = found_phdr; \ 261 found = found_phdr; \
204 offset = 0; \ 262 offset = 0; \
205 check_flags = PF_X; \ 263 check_flags = PF_X; \
206 } 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++) \
207 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 266 warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
208 found = found_relro; \ 267 found = found_relro; \
209 offset = 4; \ 268 offset = 4; \
210 check_flags = PF_X; \ 269 check_flags = PF_X; \
211 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 270 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
212 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) \
213 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; \
214 found = found_load; \ 276 found = found_load; \
215 offset = 8; \ 277 offset = 8; \
216 check_flags = PF_W|PF_X; \ 278 check_flags = PF_W|PF_X; \
217 } else \ 279 } else \
218 continue; \ 280 continue; \
255 break; \ 317 break; \
256 } \ 318 } \
257 } \ 319 } \
258 skip_this_shdr##B: \ 320 skip_this_shdr##B: \
259 if (!multi_stack) { \ 321 if (!multi_stack) { \
322 if (file_matches_list(elf->filename, qa_execstack)) \
323 return NULL; \
260 *found_phdr = 1; \ 324 *found_phdr = 1; \
261 shown = 1; \ 325 shown = 1; \
262 memcpy(ret, "!WX", 3); \ 326 memcpy(ret, "!WX", 3); \
263 } \ 327 } \
264 } \ 328 } \
269 if (be_wewy_wewy_quiet || (be_quiet && !shown)) 333 if (be_wewy_wewy_quiet || (be_quiet && !shown))
270 return NULL; 334 return NULL;
271 else 335 else
272 return ret; 336 return ret;
273} 337}
338
339/*
340 * See if this ELF contains a DT_TEXTREL tag in any of its
341 * PT_DYNAMIC sections.
342 */
274static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 343static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
275{ 344{
276 static const char *ret = "TEXTREL"; 345 static const char *ret = "TEXTREL";
277 unsigned long i; 346 unsigned long i;
278 347
279 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;
280 351
281 if (elf->phdr) { 352 if (elf->phdr) {
282#define SHOW_TEXTREL(B) \ 353#define SHOW_TEXTREL(B) \
283 if (elf->elf_class == ELFCLASS ## B) { \ 354 if (elf->elf_class == ELFCLASS ## B) { \
284 Elf ## B ## _Dyn *dyn; \ 355 Elf ## B ## _Dyn *dyn; \
285 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 356 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
286 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 357 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
287 Elf ## B ## _Off offset; \ 358 Elf ## B ## _Off offset; \
288 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 359 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
289 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; \
290 offset = EGET(phdr[i].p_offset); \ 361 offset = EGET(phdr[i].p_offset); \
291 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 362 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
292 dyn = DYN ## B (elf->data + offset); \ 363 dyn = DYN ## B (elf->data + offset); \
293 while (EGET(dyn->d_tag) != DT_NULL) { \ 364 while (EGET(dyn->d_tag) != DT_NULL) { \
294 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)*/ \
306 if (be_quiet || be_wewy_wewy_quiet) 377 if (be_quiet || be_wewy_wewy_quiet)
307 return NULL; 378 return NULL;
308 else 379 else
309 return " - "; 380 return " - ";
310} 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 */
311static 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)
312{ 389{
313 unsigned long s, r, rmax; 390 unsigned long s, r, rmax;
314 void *symtab_void, *strtab_void, *text_void; 391 void *symtab_void, *strtab_void, *text_void;
315 392
382 /* show the raw details about this reloc */ \ 459 /* show the raw details about this reloc */ \
383 printf(" %s: ", elf->base_filename); \ 460 printf(" %s: ", elf->base_filename); \
384 if (sym && sym->st_name) \ 461 if (sym && sym->st_name) \
385 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))); \
386 else \ 463 else \
387 printf("(memory/fake?)"); \ 464 printf("(memory/data?)"); \
388 printf(" [0x%lX]", (unsigned long)r_offset); \ 465 printf(" [0x%lX]", (unsigned long)r_offset); \
389 /* 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 */ \
390 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 467 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
391 func = NULL; \ 468 func = NULL; \
392 offset_tmp = 0; \ 469 offset_tmp = 0; \
396 offset_tmp = EGET(sym->st_value); \ 473 offset_tmp = EGET(sym->st_value); \
397 } \ 474 } \
398 ++sym; \ 475 ++sym; \
399 } \ 476 } \
400 printf(" in "); \ 477 printf(" in "); \
401 if (func && func->st_name) \ 478 if (func && func->st_name) { \
402 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); \
403 else \ 482 else \
404 printf("(NULL: fake?)"); \ 483 printf("%s", func_name); \
484 } else \
485 printf("(optimized out)"); \
405 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 } \
406 } \ 507 } \
407 } } 508 } }
408 SHOW_TEXTRELS(32) 509 SHOW_TEXTRELS(32)
409 SHOW_TEXTRELS(64) 510 SHOW_TEXTRELS(64)
410 } 511 }
428 warnf("Security problem NULL %s in %s", dt_type, elf->filename); 529 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
429 break; 530 break;
430 case '$': 531 case '$':
431 if (fstat(elf->fd, &st) != -1) 532 if (fstat(elf->fd, &st) != -1)
432 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 533 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
433 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",
434 dt_type, item, elf->filename, st.st_mode & 07777); 535 dt_type, item, elf->filename, (unsigned int) st.st_mode & 07777);
435 break; 536 break;
436 default: 537 default:
437 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);
438 break; 539 break;
439 } 540 }
459 Elf ## B ## _Off offset; \ 560 Elf ## B ## _Off offset; \
460 Elf ## B ## _Xword word; \ 561 Elf ## B ## _Xword word; \
461 /* Scan all the program headers */ \ 562 /* Scan all the program headers */ \
462 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 563 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
463 /* Just scan dynamic headers */ \ 564 /* Just scan dynamic headers */ \
464 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; \
465 offset = EGET(phdr[i].p_offset); \ 566 offset = EGET(phdr[i].p_offset); \
466 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 567 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
467 /* Just scan dynamic RPATH/RUNPATH headers */ \ 568 /* Just scan dynamic RPATH/RUNPATH headers */ \
468 dyn = DYN ## B (elf->data + offset); \ 569 dyn = DYN ## B (elf->data + offset); \
469 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \ 570 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
598#define FLAG_POWERPC_LIB64 0x0500 699#define FLAG_POWERPC_LIB64 0x0500
599#define FLAG_MIPS64_LIBN32 0x0600 700#define FLAG_MIPS64_LIBN32 0x0600
600#define FLAG_MIPS64_LIBN64 0x0700 701#define FLAG_MIPS64_LIBN64 0x0700
601 702
602static char *lookup_cache_lib(elfobj *, char *); 703static char *lookup_cache_lib(elfobj *, char *);
704
603#if defined(__GLIBC__) || defined(__UCLIBC__) 705#if defined(__GLIBC__) || defined(__UCLIBC__)
706
604static char *lookup_cache_lib(elfobj *elf, char *fname) 707static char *lookup_cache_lib(elfobj *elf, char *fname)
605{ 708{
606 int fd = 0; 709 int fd = 0;
607 char *strs; 710 char *strs;
608 static char buf[__PAX_UTILS_PATH_MAX] = ""; 711 static char buf[__PAX_UTILS_PATH_MAX] = "";
664 continue; 767 continue;
665 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf)); 768 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
666 } 769 }
667 return buf; 770 return buf;
668} 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;
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}
669#else 797#else
670#warning Cache support not implemented for your current target. 798#warning Cache support not implemented for your target
671static char *lookup_cache_lib(elfobj *elf, char *fname) 799static char *lookup_cache_lib(elfobj *elf, char *fname)
672{ 800{
673 return NULL; 801 return NULL;
674} 802}
675#endif 803#endif
692 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 820 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
693 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 821 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
694 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 822 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
695 Elf ## B ## _Off offset; \ 823 Elf ## B ## _Off offset; \
696 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 824 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
697 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; \
698 offset = EGET(phdr[i].p_offset); \ 826 offset = EGET(phdr[i].p_offset); \
699 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 827 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
700 dyn = DYN ## B (elf->data + offset); \ 828 dyn = DYN ## B (elf->data + offset); \
701 while (EGET(dyn->d_tag) != DT_NULL) { \ 829 while (EGET(dyn->d_tag) != DT_NULL) { \
702 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 830 if (EGET(dyn->d_tag) == DT_NEEDED) { \
714 needed = p; \ 842 needed = p; \
715 xstrcat(ret, needed, ret_len); \ 843 xstrcat(ret, needed, ret_len); \
716 } \ 844 } \
717 *found_needed = 1; \ 845 *found_needed = 1; \
718 } else { \ 846 } else { \
719 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 847 if (!strncmp(find_lib, needed, strlen( !g_match ? needed : find_lib))) { \
720 *found_lib = 1; \ 848 *found_lib = 1; \
721 return (be_wewy_wewy_quiet ? NULL : needed); \ 849 return (be_wewy_wewy_quiet ? NULL : needed); \
722 } \ 850 } \
723 } \ 851 } \
724 } \ 852 } \
767 Elf ## B ## _Dyn *dyn; \ 895 Elf ## B ## _Dyn *dyn; \
768 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 896 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
769 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 897 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
770 Elf ## B ## _Off offset; \ 898 Elf ## B ## _Off offset; \
771 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 899 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
772 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; \
773 dynamic = 1; \ 901 dynamic = 1; \
774 offset = EGET(phdr[i].p_offset); \ 902 offset = EGET(phdr[i].p_offset); \
775 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 903 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
776 dyn = DYN ## B (elf->data + offset); \ 904 dyn = DYN ## B (elf->data + offset); \
777 while (EGET(dyn->d_tag) != DT_NULL) { \ 905 while (EGET(dyn->d_tag) != DT_NULL) { \
789 SHOW_BIND(32) 917 SHOW_BIND(32)
790 SHOW_BIND(64) 918 SHOW_BIND(64)
791 919
792 if (be_wewy_wewy_quiet) return NULL; 920 if (be_wewy_wewy_quiet) return NULL;
793 921
922 /* don't output anything if quiet mode and the ELF is static or not setuid */
794 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))))) {
795 return NULL; 924 return NULL;
796 } else { 925 } else {
797 *found_bind = 1; 926 *found_bind = 1;
798 return (char *) (dynamic ? "LAZY" : "STATIC"); 927 return (char *) (dynamic ? "LAZY" : "STATIC");
799 } 928 }
815 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 944 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
816 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 945 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
817 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 946 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
818 Elf ## B ## _Off offset; \ 947 Elf ## B ## _Off offset; \
819 /* only look for soname in shared objects */ \ 948 /* only look for soname in shared objects */ \
820 if (ehdr->e_type != ET_DYN) \ 949 if (EGET(ehdr->e_type) != ET_DYN) \
821 return NULL; \ 950 return NULL; \
822 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 951 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
823 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; \
824 offset = EGET(phdr[i].p_offset); \ 953 offset = EGET(phdr[i].p_offset); \
825 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 954 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
826 dyn = DYN ## B (elf->data + offset); \ 955 dyn = DYN ## B (elf->data + offset); \
827 while (EGET(dyn->d_tag) != DT_NULL) { \ 956 while (EGET(dyn->d_tag) != DT_NULL) { \
828 if (EGET(dyn->d_tag) == DT_SONAME) { \ 957 if (EGET(dyn->d_tag) == DT_SONAME) { \
842 SHOW_SONAME(64) 971 SHOW_SONAME(64)
843 } 972 }
844 973
845 return NULL; 974 return NULL;
846} 975}
976
847static char *scanelf_file_sym(elfobj *elf, char *found_sym) 977static char *scanelf_file_sym(elfobj *elf, char *found_sym)
848{ 978{
849 unsigned long i; 979 unsigned long i;
850 char *ret; 980 char *ret;
851 void *symtab_void, *strtab_void; 981 void *symtab_void, *strtab_void;
873 warnf("%s: corrupt ELF symbols", elf->filename); \ 1003 warnf("%s: corrupt ELF symbols", elf->filename); \
874 ++sym; \ 1004 ++sym; \
875 continue; \ 1005 continue; \
876 } \ 1006 } \
877 /* debug display ... show all symbols and some extra info */ \ 1007 /* debug display ... show all symbols and some extra info */ \
878 if (*ret == '*') { \ 1008 if (g_match ? rematch(ret, symname, REG_EXTENDED) == 0 : *ret == '*') { \
879 printf("%s(%s) %5lX %15s %s\n", \ 1009 printf("%s(%s) %5lX %15s %s %s\n", \
880 ((*found_sym == 0) ? "\n\t" : "\t"), \ 1010 ((*found_sym == 0) ? "\n\t" : "\t"), \
881 elf->base_filename, \ 1011 elf->base_filename, \
882 (unsigned long)sym->st_size, \ 1012 (unsigned long)sym->st_size, \
883 get_elfstttype(sym->st_info), \ 1013 get_elfstttype(sym->st_info), \
884 symname); \ 1014 sym->st_shndx == SHN_UNDEF ? "U" : "D", symname); \
885 *found_sym = 1; \ 1015 *found_sym = 1; \
886 } else { \ 1016 } else { \
887 /* 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 */ \
888 char *this_sym, *next_sym; \ 1018 char *this_sym, *this_sym_ver, *next_sym; \
889 this_sym = ret; \ 1019 this_sym = ret; \
1020 this_sym_ver = versioned_symname; \
890 do { \ 1021 do { \
891 next_sym = strchr(this_sym, ','); \ 1022 next_sym = strchr(this_sym, ','); \
892 if (next_sym == NULL) \ 1023 if (next_sym == NULL) \
893 next_sym = this_sym + strlen(this_sym); \ 1024 next_sym = this_sym + strlen(this_sym); \
894 /* do we want a defined symbol ? */ \ 1025 /* do we want a defined symbol ? */ \
895 if (*this_sym == '+') { \ 1026 if (*this_sym == '+') { \
896 if (sym->st_shndx == SHN_UNDEF) \ 1027 if (sym->st_shndx == SHN_UNDEF) \
897 goto skip_this_sym##B; \ 1028 goto skip_this_sym##B; \
898 ++this_sym; \ 1029 ++this_sym; \
1030 ++this_sym_ver; \
899 /* do we want an undefined symbol ? */ \ 1031 /* do we want an undefined symbol ? */ \
900 } else if (*this_sym == '-') { \ 1032 } else if (*this_sym == '-') { \
901 if (sym->st_shndx != SHN_UNDEF) \ 1033 if (sym->st_shndx != SHN_UNDEF) \
902 goto skip_this_sym##B; \ 1034 goto skip_this_sym##B; \
903 ++this_sym; \ 1035 ++this_sym; \
1036 ++this_sym_ver; \
904 } \ 1037 } \
905 /* ok, lets compare the name now */ \ 1038 /* ok, lets compare the name now */ \
906 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') || \
907 (strcmp(symname, versioned_symname) == 0)) { \ 1040 (strncmp(this_sym_ver, symname, strlen(this_sym_ver)) == 0)) { \
908 if (be_semi_verbose) { \ 1041 if (be_semi_verbose) { \
909 char buf[126]; \ 1042 char buf[126]; \
910 snprintf(buf, sizeof(buf), "%lX %s %s", \ 1043 snprintf(buf, sizeof(buf), "%lX %s %s", \
911 (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); \
912 ret = buf; \ 1045 ret = buf; \
969/* scan an elf file and show all the fun stuff */ 1102/* scan an elf file and show all the fun stuff */
970#define prints(str) write(fileno(stdout), str, strlen(str)) 1103#define prints(str) write(fileno(stdout), str, strlen(str))
971static int scanelf_elfobj(elfobj *elf) 1104static int scanelf_elfobj(elfobj *elf)
972{ 1105{
973 unsigned long i; 1106 unsigned long i;
974 char found_pax, found_phdr, found_relro, found_load, found_textrel, 1107 char found_pax, found_phdr, found_relro, found_load, found_textrel,
975 found_rpath, found_needed, found_interp, found_bind, found_soname, 1108 found_rpath, found_needed, found_interp, found_bind, found_soname,
976 found_sym, found_lib, found_file, found_textrels, found_section; 1109 found_sym, found_lib, found_file, found_textrels, found_section;
977 static char *out_buffer = NULL; 1110 static char *out_buffer = NULL;
978 static size_t out_len; 1111 static size_t out_len;
979 1112
980 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 1113 found_pax = found_phdr = found_relro = found_load = found_textrel = \
989 printf("%s: scanning file\n", elf->filename); 1122 printf("%s: scanning file\n", elf->filename);
990 1123
991 /* init output buffer */ 1124 /* init output buffer */
992 if (!out_buffer) { 1125 if (!out_buffer) {
993 out_len = sizeof(char) * 80; 1126 out_len = sizeof(char) * 80;
994 out_buffer = (char*)xmalloc(out_len); 1127 out_buffer = xmalloc(out_len);
995 } 1128 }
996 *out_buffer = '\0'; 1129 *out_buffer = '\0';
997 1130
998 /* show the header */ 1131 /* show the header */
999 if (!be_quiet && show_banner) { 1132 if (!be_quiet && show_banner) {
1010 case 'o': prints(" TYPE "); break; 1143 case 'o': prints(" TYPE "); break;
1011 case 'x': prints(" PAX "); break; 1144 case 'x': prints(" PAX "); break;
1012 case 'e': prints("STK/REL/PTL "); break; 1145 case 'e': prints("STK/REL/PTL "); break;
1013 case 't': prints("TEXTREL "); break; 1146 case 't': prints("TEXTREL "); break;
1014 case 'r': prints("RPATH "); break; 1147 case 'r': prints("RPATH "); break;
1148 case 'M': prints("CLASS "); break;
1015 case 'n': prints("NEEDED "); break; 1149 case 'n': prints("NEEDED "); break;
1016 case 'i': prints("INTERP "); break; 1150 case 'i': prints("INTERP "); break;
1017 case 'b': prints("BIND "); break; 1151 case 'b': prints("BIND "); break;
1018 case 'S': prints("SONAME "); break; 1152 case 'S': prints("SONAME "); break;
1019 case 's': prints("SYM "); break; 1153 case 's': prints("SYM "); break;
1020 case 'N': prints("LIB "); break; 1154 case 'N': prints("LIB "); break;
1021 case 'T': prints("TEXTRELS "); break; 1155 case 'T': prints("TEXTRELS "); break;
1022 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;
1023 default: warnf("'%c' has no title ?", out_format[i]); 1160 default: warnf("'%c' has no title ?", out_format[i]);
1024 } 1161 }
1025 } 1162 }
1026 if (!found_file) prints("FILE "); 1163 if (!found_file) prints("FILE ");
1027 prints("\n"); 1164 prints("\n");
1077 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 1214 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
1078 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;
1079 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 1216 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
1080 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;
1081 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;
1082 case 'n': 1222 case 'n':
1083 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;
1084 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 1224 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
1085 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 1225 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
1086 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 1226 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
1087 case 's': out = scanelf_file_sym(elf, &found_sym); break; 1227 case 's': out = scanelf_file_sym(elf, &found_sym); break;
1088 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;
1089 default: warnf("'%c' has no scan code?", out_format[i]); 1230 default: warnf("'%c' has no scan code?", out_format[i]);
1090 } 1231 }
1091 if (out) { 1232 if (out) {
1092 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */ 1233 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
1093 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL) 1234 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
1139 if (strlen(match_etypes)) { 1280 if (strlen(match_etypes)) {
1140 char sbuf[126]; 1281 char sbuf[126];
1141 strncpy(sbuf, match_etypes, sizeof(sbuf)); 1282 strncpy(sbuf, match_etypes, sizeof(sbuf));
1142 if (strchr(match_etypes, ',') != NULL) { 1283 if (strchr(match_etypes, ',') != NULL) {
1143 char *p; 1284 char *p;
1144 while((p = strrchr(sbuf, ',')) != NULL) { 1285 while ((p = strrchr(sbuf, ',')) != NULL) {
1145 *p = 0; 1286 *p = 0;
1146 if (etype_lookup(p+1) == get_etype(elf)) 1287 if (etype_lookup(p+1) == get_etype(elf))
1147 goto label_ret; 1288 goto label_ret;
1148 } 1289 }
1149 } 1290 }
1182 munmap(ar_buffer, len); 1323 munmap(ar_buffer, len);
1183 1324
1184 return 0; 1325 return 0;
1185} 1326}
1186/* 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 */
1187static void scanelf_file(const char *filename) 1328static int scanelf_file(const char *filename, const struct stat *st_cache)
1188{ 1329{
1330 const struct stat *st = st_cache;
1189 struct stat st; 1331 struct stat symlink_st;
1190 int fd; 1332 int fd;
1191 1333
1192 /* make sure 'filename' exists */
1193 if (lstat(filename, &st) == -1) {
1194 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1195 return;
1196 }
1197
1198 /* always handle regular files and handle symlinked files if no -y */ 1334 /* always handle regular files and handle symlinked files if no -y */
1199 if (S_ISLNK(st.st_mode)) { 1335 if (S_ISLNK(st->st_mode)) {
1200 if (!scan_symlink) return; 1336 if (!scan_symlink) return 1;
1201 stat(filename, &st); 1337 stat(filename, &symlink_st);
1338 st = &symlink_st;
1202 } 1339 }
1340
1203 if (!S_ISREG(st.st_mode)) { 1341 if (!S_ISREG(st->st_mode)) {
1204 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 1342 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1205 return; 1343 return 1;
1206 } 1344 }
1207 1345
1346 if (match_perms) {
1347 if ((st->st_mode | match_perms) != st->st_mode)
1348 return 1;
1349 }
1208 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1) 1350 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1209 return; 1351 return 1;
1210 1352
1211 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives) 1353 if (scanelf_elf(filename, fd, st->st_size) == 1 && scan_archives)
1212 /* 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 */
1213 scanelf_archive(filename, fd, st.st_size); 1355 scanelf_archive(filename, fd, st->st_size);
1214 1356
1215 close(fd); 1357 close(fd);
1358 return 0;
1216} 1359}
1217 1360
1218/* 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 */
1219static void scanelf_dir(const char *path) 1362static int scanelf_dir(const char *path)
1220{ 1363{
1221 register DIR *dir; 1364 register DIR *dir;
1222 register struct dirent *dentry; 1365 register struct dirent *dentry;
1223 struct stat st_top, st; 1366 struct stat st_top, st;
1224 char buf[__PAX_UTILS_PATH_MAX]; 1367 char buf[__PAX_UTILS_PATH_MAX];
1225 size_t pathlen = 0, len = 0; 1368 size_t pathlen = 0, len = 0;
1369 int ret = 0;
1226 1370
1227 /* make sure path exists */ 1371 /* make sure path exists */
1228 if (lstat(path, &st_top) == -1) { 1372 if (lstat(path, &st_top) == -1) {
1229 if (be_verbose > 2) printf("%s: does not exist\n", path); 1373 if (be_verbose > 2) printf("%s: does not exist\n", path);
1230 return; 1374 return 1;
1231 } 1375 }
1232 1376
1233 /* 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 */
1234 if (!S_ISDIR(st_top.st_mode)) { 1378 if (!S_ISDIR(st_top.st_mode)) {
1235 scanelf_file(path); 1379 return scanelf_file(path, &st_top);
1236 return;
1237 } 1380 }
1238 1381
1239 /* now scan the dir looking for fun stuff */ 1382 /* now scan the dir looking for fun stuff */
1240 if ((dir = opendir(path)) == NULL) { 1383 if ((dir = opendir(path)) == NULL) {
1241 warnf("could not opendir %s: %s", path, strerror(errno)); 1384 warnf("could not opendir %s: %s", path, strerror(errno));
1242 return; 1385 return 1;
1243 } 1386 }
1244 if (be_verbose > 1) printf("%s: scanning dir\n", path); 1387 if (be_verbose > 1) printf("%s: scanning dir\n", path);
1245 1388
1246 pathlen = strlen(path); 1389 pathlen = strlen(path);
1247 while ((dentry = readdir(dir))) { 1390 while ((dentry = readdir(dir))) {
1251 if (len >= sizeof(buf)) { 1394 if (len >= sizeof(buf)) {
1252 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path, 1395 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1253 (unsigned long)len, (unsigned long)sizeof(buf)); 1396 (unsigned long)len, (unsigned long)sizeof(buf));
1254 continue; 1397 continue;
1255 } 1398 }
1256 sprintf(buf, "%s/%s", path, dentry->d_name); 1399 snprintf(buf, sizeof(buf), "%s%s%s", path, (path[pathlen-1] == '/') ? "" : "/", dentry->d_name);
1257 if (lstat(buf, &st) != -1) { 1400 if (lstat(buf, &st) != -1) {
1258 if (S_ISREG(st.st_mode)) 1401 if (S_ISREG(st.st_mode))
1259 scanelf_file(buf); 1402 ret = scanelf_file(buf, &st);
1260 else if (dir_recurse && S_ISDIR(st.st_mode)) { 1403 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1261 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 1404 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1262 scanelf_dir(buf); 1405 ret = scanelf_dir(buf);
1263 } 1406 }
1264 } 1407 }
1265 } 1408 }
1266 closedir(dir); 1409 closedir(dir);
1410 return ret;
1267} 1411}
1268 1412
1269static int scanelf_from_file(const char *filename) 1413static int scanelf_from_file(const char *filename)
1270{ 1414{
1271 FILE *fp = NULL; 1415 FILE *fp = NULL;
1272 char *p; 1416 char *p;
1273 char path[__PAX_UTILS_PATH_MAX]; 1417 char path[__PAX_UTILS_PATH_MAX];
1418 int ret = 0;
1274 1419
1275 if (strcmp(filename, "-") == 0) 1420 if (strcmp(filename, "-") == 0)
1276 fp = stdin; 1421 fp = stdin;
1277 else if ((fp = fopen(filename, "r")) == NULL) 1422 else if ((fp = fopen(filename, "r")) == NULL)
1278 return 1; 1423 return 1;
1279 1424
1280 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1425 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1281 if ((p = strchr(path, '\n')) != NULL) 1426 if ((p = strchr(path, '\n')) != NULL)
1282 *p = 0; 1427 *p = 0;
1283 search_path = path; 1428 search_path = path;
1284 scanelf_dir(path); 1429 ret = scanelf_dir(path);
1285 } 1430 }
1286 if (fp != stdin) 1431 if (fp != stdin)
1287 fclose(fp); 1432 fclose(fp);
1288 return 0; 1433 return ret;
1289} 1434}
1290 1435
1291#if defined(__GLIBC__) || defined(__UCLIBC__) 1436#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
1437
1292static int load_ld_so_conf(int i, const char *fname) 1438static int load_ld_cache_config(int i, const char *fname)
1293{ 1439{
1294 FILE *fp = NULL; 1440 FILE *fp = NULL;
1295 char *p; 1441 char *p;
1296 char path[__PAX_UTILS_PATH_MAX]; 1442 char path[__PAX_UTILS_PATH_MAX];
1297 1443
1298 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1444 if (i + 1 == ARRAY_SIZE(ldpaths))
1299 return i; 1445 return i;
1300 1446
1301 if ((fp = fopen(fname, "r")) == NULL) 1447 if ((fp = fopen(fname, "r")) == NULL)
1302 return i; 1448 return i;
1303 1449
1304 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) { 1450 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1305 if ((p = strrchr(path, '\r')) != NULL) 1451 if ((p = strrchr(path, '\r')) != NULL)
1306 *p = 0; 1452 *p = 0;
1307 if ((p = strchr(path, '\n')) != NULL) 1453 if ((p = strchr(path, '\n')) != NULL)
1308 *p = 0; 1454 *p = 0;
1455#ifdef __linux__
1309 // recursive includes of the same file will make this segfault. 1456 /* recursive includes of the same file will make this segfault. */
1310 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) { 1457 if ((memcmp(path, "include", 7) == 0) && isblank(path[7])) {
1311 glob64_t gl; 1458 glob64_t gl;
1312 size_t x; 1459 size_t x;
1313 char gpath[__PAX_UTILS_PATH_MAX]; 1460 char gpath[__PAX_UTILS_PATH_MAX];
1314 1461
1322 if ((glob64(gpath, 0, NULL, &gl)) == 0) { 1469 if ((glob64(gpath, 0, NULL, &gl)) == 0) {
1323 for (x = 0; x < gl.gl_pathc; ++x) { 1470 for (x = 0; x < gl.gl_pathc; ++x) {
1324 /* try to avoid direct loops */ 1471 /* try to avoid direct loops */
1325 if (strcmp(gl.gl_pathv[x], fname) == 0) 1472 if (strcmp(gl.gl_pathv[x], fname) == 0)
1326 continue; 1473 continue;
1327 i = load_ld_so_conf(i, gl.gl_pathv[x]); 1474 i = load_ld_cache_config(i, gl.gl_pathv[x]);
1328 if (i + 1 >= sizeof(ldpaths) / sizeof(*ldpaths)) { 1475 if (i + 1 >= ARRAY_SIZE(ldpaths)) {
1329 globfree64(&gl); 1476 globfree64(&gl);
1330 return i; 1477 return i;
1331 } 1478 }
1332 } 1479 }
1333 globfree64 (&gl); 1480 globfree64 (&gl);
1334 continue; 1481 continue;
1335 } else
1336 abort();
1337 } 1482 }
1483 }
1484#endif
1338 if (*path != '/') 1485 if (*path != '/')
1339 continue; 1486 continue;
1340 1487
1341 ldpaths[i++] = xstrdup(path); 1488 ldpaths[i++] = xstrdup(path);
1342 1489
1343 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1490 if (i + 1 == ARRAY_SIZE(ldpaths))
1344 break; 1491 break;
1345 } 1492 }
1346 ldpaths[i] = NULL; 1493 ldpaths[i] = NULL;
1347 1494
1348 fclose(fp); 1495 fclose(fp);
1349 return i; 1496 return i;
1350} 1497}
1351#endif
1352 1498
1353#if defined(__FreeBSD__) || (__DragonFly__) 1499#elif defined(__FreeBSD__) || (__DragonFly__)
1500
1354static int load_ld_so_hints(int i, const char *fname) 1501static int load_ld_cache_config(int i, const char *fname)
1355{ 1502{
1356 FILE *fp = NULL; 1503 FILE *fp = NULL;
1357 char *b = NULL, *p; 1504 char *b = NULL, *p;
1358 struct elfhints_hdr hdr; 1505 struct elfhints_hdr hdr;
1359 1506
1360 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1507 if (i + 1 == ARRAY_SIZE(ldpaths))
1361 return i; 1508 return i;
1362 1509
1363 if ((fp = fopen(fname, "r")) == NULL) 1510 if ((fp = fopen(fname, "r")) == NULL)
1364 return i; 1511 return i;
1365 1512
1366 if ( fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) || 1513 if (fread(&hdr, 1, sizeof(hdr), fp) != sizeof(hdr) ||
1367 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 || 1514 hdr.magic != ELFHINTS_MAGIC || hdr.version != 1 ||
1368 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1 1515 fseek(fp, hdr.strtab + hdr.dirlist, SEEK_SET) == -1)
1369 ) { 1516 {
1370 fclose(fp); 1517 fclose(fp);
1371 return i; 1518 return i;
1372 } 1519 }
1373 1520
1374 b = (char*)malloc(hdr.dirlistlen+1); 1521 b = xmalloc(hdr.dirlistlen + 1);
1375 if ( fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1 ) { 1522 if (fread(b, 1, hdr.dirlistlen+1, fp) != hdr.dirlistlen+1) {
1376 fclose(fp); 1523 fclose(fp);
1377 free(b); 1524 free(b);
1378 return i; 1525 return i;
1379 } 1526 }
1380 1527
1381 while ( (p = strsep(&b, ":")) ) { 1528 while ((p = strsep(&b, ":"))) {
1382 if ( *p == '\0' ) continue; 1529 if (*p == '\0') continue;
1383 ldpaths[i++] = xstrdup(p); 1530 ldpaths[i++] = xstrdup(p);
1384 1531
1385 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths)) 1532 if (i + 1 == ARRAY_SIZE(ldpaths))
1386 break; 1533 break;
1387 } 1534 }
1388 ldpaths[i] = NULL; 1535 ldpaths[i] = NULL;
1389 1536
1390 free(b); 1537 free(b);
1391 fclose(fp); 1538 fclose(fp);
1392 return i; 1539 return i;
1393} 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
1394#endif 1550#endif
1395 1551
1396/* scan /etc/ld.so.conf for paths */ 1552/* scan /etc/ld.so.conf for paths */
1397static void scanelf_ldpath() 1553static void scanelf_ldpath(void)
1398{ 1554{
1399 char scan_l, scan_ul, scan_ull; 1555 char scan_l, scan_ul, scan_ull;
1400 int i = 0; 1556 int i = 0;
1401 1557
1402 if (!ldpaths[0]) 1558 if (!ldpaths[0])
1416 if (!scan_ul) scanelf_dir("/usr/lib"); 1572 if (!scan_ul) scanelf_dir("/usr/lib");
1417 if (!scan_ull) scanelf_dir("/usr/local/lib"); 1573 if (!scan_ull) scanelf_dir("/usr/local/lib");
1418} 1574}
1419 1575
1420/* scan env PATH for paths */ 1576/* scan env PATH for paths */
1421static void scanelf_envpath() 1577static void scanelf_envpath(void)
1422{ 1578{
1423 char *path, *p; 1579 char *path, *p;
1424 1580
1425 path = getenv("PATH"); 1581 path = getenv("PATH");
1426 if (!path) 1582 if (!path)
1433 } 1589 }
1434 1590
1435 free(path); 1591 free(path);
1436} 1592}
1437 1593
1438/* 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 */
1439#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"
1440#define a_argument required_argument 1597#define a_argument required_argument
1441static struct option const long_opts[] = { 1598static struct option const long_opts[] = {
1442 {"path", no_argument, NULL, 'p'}, 1599 {"path", no_argument, NULL, 'p'},
1443 {"ldpath", no_argument, NULL, 'l'}, 1600 {"ldpath", no_argument, NULL, 'l'},
1444 {"recursive", no_argument, NULL, 'R'}, 1601 {"recursive", no_argument, NULL, 'R'},
1461 {"lib", a_argument, NULL, 'N'}, 1618 {"lib", a_argument, NULL, 'N'},
1462 {"gmatch", no_argument, NULL, 'g'}, 1619 {"gmatch", no_argument, NULL, 'g'},
1463 {"textrels", no_argument, NULL, 'T'}, 1620 {"textrels", no_argument, NULL, 'T'},
1464 {"etype", a_argument, NULL, 'E'}, 1621 {"etype", a_argument, NULL, 'E'},
1465 {"bits", a_argument, NULL, 'M'}, 1622 {"bits", a_argument, NULL, 'M'},
1623 {"endian", no_argument, NULL, 'D'},
1624 {"perms", a_argument, NULL, 'O'},
1466 {"all", no_argument, NULL, 'a'}, 1625 {"all", no_argument, NULL, 'a'},
1467 {"quiet", no_argument, NULL, 'q'}, 1626 {"quiet", no_argument, NULL, 'q'},
1468 {"verbose", no_argument, NULL, 'v'}, 1627 {"verbose", no_argument, NULL, 'v'},
1469 {"format", a_argument, NULL, 'F'}, 1628 {"format", a_argument, NULL, 'F'},
1470 {"from", a_argument, NULL, 'f'}, 1629 {"from", a_argument, NULL, 'f'},
1498 "Find a specified library", 1657 "Find a specified library",
1499 "Use strncmp to match libraries. (use with -N)", 1658 "Use strncmp to match libraries. (use with -N)",
1500 "Locate cause of TEXTREL", 1659 "Locate cause of TEXTREL",
1501 "Print only ELF files matching etype ET_DYN,ET_EXEC ...", 1660 "Print only ELF files matching etype ET_DYN,ET_EXEC ...",
1502 "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",
1503 "Print all scanned info (-x -e -t -r -b)\n", 1664 "Print all scanned info (-x -e -t -r -b)\n",
1504 "Only output 'bad' things", 1665 "Only output 'bad' things",
1505 "Be verbose (can be specified more than once)", 1666 "Be verbose (can be specified more than once)",
1506 "Use specified format for output", 1667 "Use specified format for output",
1507 "Read input stream from a filename", 1668 "Read input stream from a filename",
1519 printf("* Scan ELF binaries for stuff\n\n" 1680 printf("* Scan ELF binaries for stuff\n\n"
1520 "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);
1521 printf("Options: -[%s]\n", PARSE_FLAGS); 1682 printf("Options: -[%s]\n", PARSE_FLAGS);
1522 for (i = 0; long_opts[i].name; ++i) 1683 for (i = 0; long_opts[i].name; ++i)
1523 if (long_opts[i].has_arg == no_argument) 1684 if (long_opts[i].has_arg == no_argument)
1524 printf(" -%c, --%-14s* %s\n", long_opts[i].val, 1685 printf(" -%c, --%-14s* %s\n", long_opts[i].val,
1525 long_opts[i].name, opts_help[i]); 1686 long_opts[i].name, opts_help[i]);
1526 else 1687 else
1527 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val, 1688 printf(" -%c, --%-7s <arg> * %s\n", long_opts[i].val,
1528 long_opts[i].name, opts_help[i]); 1689 long_opts[i].name, opts_help[i]);
1529 1690
1530 if (status != EXIT_SUCCESS) 1691 puts("\nFor more information, see the scanelf(1) manpage");
1531 exit(status);
1532
1533 puts("\nThe format modifiers for the -F option are:");
1534 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1535 puts(" t TEXTREL \tr RPATH \tn NEEDED");
1536 puts(" i INTERP \tb BIND \ts symbol");
1537 puts(" N library \to Type \tT TEXTRELs");
1538 puts(" S SONAME \tk section");
1539 puts(" p filename (with search path removed)");
1540 puts(" f filename (short name/basename)");
1541 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1542
1543 puts("\nELF Etypes:");
1544 print_etypes(stdout);
1545
1546 exit(status); 1692 exit(status);
1547} 1693}
1548 1694
1549/* 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 }
1550static void parseargs(int argc, char *argv[]) 1704static int parseargs(int argc, char *argv[])
1551{ 1705{
1552 int i; 1706 int i;
1553 const char *from_file = NULL; 1707 const char *from_file = NULL;
1708 int ret = 0;
1554 1709
1555 opterr = 0; 1710 opterr = 0;
1556 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) {
1557 switch (i) { 1712 switch (i) {
1558 1713
1570 case 'E': 1725 case 'E':
1571 strncpy(match_etypes, optarg, sizeof(match_etypes)); 1726 strncpy(match_etypes, optarg, sizeof(match_etypes));
1572 break; 1727 break;
1573 case 'M': 1728 case 'M':
1574 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;
1575 break; 1740 break;
1576 case 'o': { 1741 case 'o': {
1577 FILE *fp = NULL;
1578 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1742 if (freopen(optarg, "w", stdout) == NULL)
1579 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1743 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1580 SET_STDOUT(fp);
1581 break; 1744 break;
1582 } 1745 }
1583 case 'k': 1746 case 'k':
1584 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");
1585 find_section = optarg; 1748 find_section = optarg;
1586 break; 1749 break;
1587 case 's': { 1750 case 's': {
1588 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");
1589 find_sym = optarg; 1752 find_sym = optarg;
1590 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1)); 1753 versioned_symname = xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1591 sprintf(versioned_symname, "%s@", find_sym); 1754 sprintf(versioned_symname, "%s@", find_sym);
1592 break; 1755 break;
1593 } 1756 }
1594 case 'N': { 1757 case 'N': {
1595 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");
1604 } 1767 }
1605 case 'z': { 1768 case 'z': {
1606 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC); 1769 unsigned long flags = (PF_NOEMUTRAMP | PF_NORANDEXEC);
1607 size_t x; 1770 size_t x;
1608 1771
1609 for (x = 0 ; x < strlen(optarg); x++) { 1772 for (x = 0; x < strlen(optarg); x++) {
1610 switch(optarg[x]) { 1773 switch (optarg[x]) {
1611 case 'p': 1774 case 'p':
1612 case 'P': 1775 case 'P':
1613 do_state(optarg[x], PAGEEXEC); 1776 do_pax_state(optarg[x], PAGEEXEC);
1614 break; 1777 break;
1615 case 's': 1778 case 's':
1616 case 'S': 1779 case 'S':
1617 do_state(optarg[x], SEGMEXEC); 1780 do_pax_state(optarg[x], SEGMEXEC);
1618 break; 1781 break;
1619 case 'm': 1782 case 'm':
1620 case 'M': 1783 case 'M':
1621 do_state(optarg[x], MPROTECT); 1784 do_pax_state(optarg[x], MPROTECT);
1622 break; 1785 break;
1623 case 'e': 1786 case 'e':
1624 case 'E': 1787 case 'E':
1625 do_state(optarg[x], EMUTRAMP); 1788 do_pax_state(optarg[x], EMUTRAMP);
1626 break; 1789 break;
1627 case 'r': 1790 case 'r':
1628 case 'R': 1791 case 'R':
1629 do_state(optarg[x], RANDMMAP); 1792 do_pax_state(optarg[x], RANDMMAP);
1630 break; 1793 break;
1631 case 'x': 1794 case 'x':
1632 case 'X': 1795 case 'X':
1633 do_state(optarg[x], RANDEXEC); 1796 do_pax_state(optarg[x], RANDEXEC);
1634 break; 1797 break;
1635 default: 1798 default:
1636 break; 1799 break;
1637 } 1800 }
1638 } 1801 }
1643 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) || 1806 ((flags & PF_EMUTRAMP) && (flags & PF_NOEMUTRAMP)) ||
1644 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP)))) 1807 ((flags & PF_RANDMMAP) && (flags & PF_NORANDMMAP))))
1645 setpax = flags; 1808 setpax = flags;
1646 break; 1809 break;
1647 } 1810 }
1648 case 'g': gmatch = 1; break; 1811 case 'g': g_match = 1; break;
1649 case 'L': use_ldcache = 1; break; 1812 case 'L': use_ldcache = 1; break;
1650 case 'y': scan_symlink = 0; break; 1813 case 'y': scan_symlink = 0; break;
1651 case 'A': scan_archives = 1; break; 1814 case 'A': scan_archives = 1; break;
1652 case 'B': show_banner = 0; break; 1815 case 'B': show_banner = 0; break;
1653 case 'l': scan_ldpath = 1; break; 1816 case 'l': scan_ldpath = 1; break;
1664 case 'b': show_bind = 1; break; 1827 case 'b': show_bind = 1; break;
1665 case 'S': show_soname = 1; break; 1828 case 'S': show_soname = 1; break;
1666 case 'T': show_textrels = 1; break; 1829 case 'T': show_textrels = 1; break;
1667 case 'q': be_quiet = 1; break; 1830 case 'q': be_quiet = 1; break;
1668 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1831 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1669 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;
1670 1833 case 'D': show_endian = 1; break;
1671 case ':': 1834 case ':':
1672 err("Option '%c' is missing parameter", optopt); 1835 err("Option '%c' is missing parameter", optopt);
1673 case '?': 1836 case '?':
1674 err("Unknown option '%c' or argument missing", optopt); 1837 err("Unknown option '%c' or argument missing", optopt);
1675 default: 1838 default:
1676 err("Unhandled option '%c'; please report this", i); 1839 err("Unhandled option '%c'; please report this", i);
1677 } 1840 }
1678 } 1841 }
1679 1842 if (show_textrels && be_verbose) {
1843 if (which("objdump") != NULL)
1844 has_objdump = 1;
1845 }
1680 /* let the format option override all other options */ 1846 /* let the format option override all other options */
1681 if (out_format) { 1847 if (out_format) {
1682 show_pax = show_phdr = show_textrel = show_rpath = \ 1848 show_pax = show_phdr = show_textrel = show_rpath = \
1683 show_needed = show_interp = show_bind = show_soname = \ 1849 show_needed = show_interp = show_bind = show_soname = \
1684 show_textrels = 0; 1850 show_textrels = show_perms = show_endian = 0;
1685 for (i = 0; out_format[i]; ++i) { 1851 for (i = 0; out_format[i]; ++i) {
1686 if (!IS_MODIFIER(out_format[i])) continue; 1852 if (!IS_MODIFIER(out_format[i])) continue;
1687 1853
1688 switch (out_format[++i]) { 1854 switch (out_format[++i]) {
1689 case '+': break; 1855 case '+': break;
1694 case 'f': break; 1860 case 'f': break;
1695 case 'k': break; 1861 case 'k': break;
1696 case 's': break; 1862 case 's': break;
1697 case 'N': break; 1863 case 'N': break;
1698 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;
1699 case 'x': show_pax = 1; break; 1869 case 'x': show_pax = 1; break;
1700 case 'e': show_phdr = 1; break; 1870 case 'e': show_phdr = 1; break;
1701 case 't': show_textrel = 1; break; 1871 case 't': show_textrel = 1; break;
1702 case 'r': show_rpath = 1; break; 1872 case 'r': show_rpath = 1; break;
1703 case 'n': show_needed = 1; break; 1873 case 'n': show_needed = 1; break;
1704 case 'i': show_interp = 1; break; 1874 case 'i': show_interp = 1; break;
1705 case 'b': show_bind = 1; break; 1875 case 'b': show_bind = 1; break;
1706 case 'S': show_soname = 1; break; 1876 case 'S': show_soname = 1; break;
1707 case 'T': show_textrels = 1; break; 1877 case 'T': show_textrels = 1; break;
1708 default: 1878 default:
1709 err("Invalid format specifier '%c' (byte %i)", 1879 err("Invalid format specifier '%c' (byte %i)",
1710 out_format[i], i+1); 1880 out_format[i], i+1);
1711 } 1881 }
1712 } 1882 }
1713 1883
1714 /* construct our default format */ 1884 /* construct our default format */
1715 } else { 1885 } else {
1716 size_t fmt_len = 30; 1886 size_t fmt_len = 30;
1717 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1887 out_format = xmalloc(sizeof(char) * fmt_len);
1718 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1888 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1719 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);
1720 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len); 1892 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1721 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1893 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1722 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1894 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1723 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1895 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1724 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1896 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1732 } 1904 }
1733 if (be_verbose > 2) printf("Format: %s\n", out_format); 1905 if (be_verbose > 2) printf("Format: %s\n", out_format);
1734 1906
1735 /* now lets actually do the scanning */ 1907 /* now lets actually do the scanning */
1736 if (scan_ldpath || use_ldcache) 1908 if (scan_ldpath || use_ldcache)
1737#if defined(__GLIBC__) || defined(__UCLIBC__) 1909 load_ld_cache_config(0, __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG);
1738 load_ld_so_conf(0, "/etc/ld.so.conf");
1739#elif defined(__FreeBSD__) || defined(__DragonFly__)
1740 load_ld_so_hints(0, _PATH_ELF_HINTS);
1741#endif
1742 if (scan_ldpath) scanelf_ldpath(); 1910 if (scan_ldpath) scanelf_ldpath();
1743 if (scan_envpath) scanelf_envpath(); 1911 if (scan_envpath) scanelf_envpath();
1744 if (!from_file && optind == argc && ttyname(0) == NULL) 1912 if (!from_file && optind == argc && ttyname(0) == NULL && !scan_ldpath && !scan_envpath)
1745 from_file = "-"; 1913 from_file = "-";
1746 if (from_file) { 1914 if (from_file) {
1747 scanelf_from_file(from_file); 1915 scanelf_from_file(from_file);
1748 from_file = *argv; 1916 from_file = *argv;
1749 } 1917 }
1750 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1918 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1751 err("Nothing to scan !?"); 1919 err("Nothing to scan !?");
1752 while (optind < argc) { 1920 while (optind < argc) {
1753 search_path = argv[optind++]; 1921 search_path = argv[optind++];
1754 scanelf_dir(search_path); 1922 ret = scanelf_dir(search_path);
1755 } 1923 }
1756 1924
1757 /* clean up */ 1925 /* clean up */
1758 if (versioned_symname) free(versioned_symname); 1926 free(versioned_symname);
1759 for (i = 0; ldpaths[i]; ++i) 1927 for (i = 0; ldpaths[i]; ++i)
1760 free(ldpaths[i]); 1928 free(ldpaths[i]);
1761 1929
1762 if (ldcache != 0) 1930 if (ldcache != 0)
1763 munmap(ldcache, ldcache_size); 1931 munmap(ldcache, ldcache_size);
1764}
1765
1766
1767
1768/* utility funcs */
1769static char *xstrdup(const char *s)
1770{
1771 char *ret = strdup(s);
1772 if (!ret) err("Could not strdup(): %s", strerror(errno));
1773 return ret; 1932 return ret;
1774} 1933}
1775static void *xmalloc(size_t size)
1776{
1777 void *ret = malloc(size);
1778 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1779 return ret;
1780}
1781static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1782{
1783 size_t new_len;
1784 1934
1785 new_len = strlen(*dst) + strlen(src); 1935static char **get_split_env(const char *envvar)
1786 if (*curr_len <= new_len) {
1787 *curr_len = new_len + (*curr_len / 2);
1788 *dst = realloc(*dst, *curr_len);
1789 if (!*dst)
1790 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1791 }
1792
1793 if (n)
1794 strncat(*dst, src, n);
1795 else
1796 strcat(*dst, src);
1797}
1798static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1799{ 1936{
1800 static char my_app[2]; 1937 const char *delims = " \t\n";
1801 my_app[0] = append; 1938 char **envvals = NULL;
1802 my_app[1] = '\0'; 1939 char *env, *s;
1803 xstrcat(dst, my_app, curr_len); 1940 int nentry;
1804}
1805 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
1806 1985
1807 1986
1808int main(int argc, char *argv[]) 1987int main(int argc, char *argv[])
1809{ 1988{
1989 int ret;
1810 if (argc < 2) 1990 if (argc < 2)
1811 usage(EXIT_FAILURE); 1991 usage(EXIT_FAILURE);
1992 parseenv();
1812 parseargs(argc, argv); 1993 ret = parseargs(argc, argv);
1813 fclose(stdout); 1994 fclose(stdout);
1814#ifdef __BOUNDS_CHECKING_ON 1995#ifdef __PAX_UTILS_CLEANUP
1815 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");
1816#endif 2000#endif
1817 return EXIT_SUCCESS; 2001 return ret;
1818} 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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