/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.88 Revision 1.119
1/* 1/*
2 * Copyright 2003-2005 Gentoo Foundation 2 * Copyright 2003-2006 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 1.88 2005/09/30 03:30:54 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.119 2006/02/05 02:25:58 solar Exp $
5 * 5 *
6 * Copyright 2003-2005 Ned Ludd - <solar@gentoo.org> 6 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org>
7 * Copyright 2004-2005 Mike Frysinger - <vapier@gentoo.org> 7 * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org>
8 */ 8 */
9 9
10#include <stdio.h>
11#include <stdlib.h>
12#include <sys/types.h>
13#include <libgen.h>
14#include <limits.h>
15#define __USE_GNU
16#include <string.h>
17#include <errno.h>
18#include <unistd.h>
19#include <sys/stat.h>
20#include <dirent.h>
21#include <getopt.h>
22#include <assert.h>
23#include "paxelf.h" 10#include "paxinc.h"
24 11
25static const char *rcsid = "$Id: scanelf.c,v 1.88 2005/09/30 03:30:54 vapier Exp $"; 12static const char *rcsid = "$Id: scanelf.c,v 1.119 2006/02/05 02:25:58 solar Exp $";
26#define argv0 "scanelf" 13#define argv0 "scanelf"
27 14
28#define IS_MODIFIER(c) (c == '%' || c == '#') 15#define IS_MODIFIER(c) (c == '%' || c == '#')
29 16
30 17
31 18
32/* prototypes */ 19/* prototypes */
20static int scanelf_elfobj(elfobj *elf);
21static int scanelf_elf(const char *filename, int fd, size_t len);
22static int scanelf_archive(const char *filename, int fd, size_t len);
33static void scanelf_file(const char *filename); 23static void scanelf_file(const char *filename);
34static void scanelf_dir(const char *path); 24static void scanelf_dir(const char *path);
35static void scanelf_ldpath(); 25static void scanelf_ldpath(void);
36static void scanelf_envpath(); 26static void scanelf_envpath(void);
37static void usage(int status); 27static void usage(int status);
38static void parseargs(int argc, char *argv[]); 28static void parseargs(int argc, char *argv[]);
39static char *xstrdup(const char *s); 29static char *xstrdup(const char *s);
40static void *xmalloc(size_t size); 30static void *xmalloc(size_t size);
41static void xstrcat(char **dst, const char *src, size_t *curr_len); 31static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
32#define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
42static inline void xchrcat(char **dst, const char append, size_t *curr_len); 33static inline void xchrcat(char **dst, const char append, size_t *curr_len);
43 34
44/* variables to control behavior */ 35/* variables to control behavior */
36static char match_etypes[126] = "";
45static char *ldpaths[256]; 37static char *ldpaths[256];
46static char scan_ldpath = 0; 38static char scan_ldpath = 0;
47static char scan_envpath = 0; 39static char scan_envpath = 0;
48static char scan_symlink = 1; 40static char scan_symlink = 1;
41static char scan_archives = 0;
49static char dir_recurse = 0; 42static char dir_recurse = 0;
50static char dir_crossmount = 1; 43static char dir_crossmount = 1;
51static char show_pax = 0; 44static char show_pax = 0;
52static char show_phdr = 0; 45static char show_phdr = 0;
53static char show_textrel = 0; 46static char show_textrel = 0;
63static char be_wewy_wewy_quiet = 0; 56static char be_wewy_wewy_quiet = 0;
64static char *find_sym = NULL, *versioned_symname = NULL; 57static char *find_sym = NULL, *versioned_symname = NULL;
65static char *find_lib = NULL; 58static char *find_lib = NULL;
66static char *out_format = NULL; 59static char *out_format = NULL;
67static char *search_path = NULL; 60static char *search_path = NULL;
61static char fix_elf = 0;
68static char gmatch = 0; 62static char gmatch = 0;
63static char use_ldcache = 0;
69 64
65
66caddr_t ldcache = 0;
67size_t ldcache_size = 0;
70 68
71/* sub-funcs for scanelf_file() */ 69/* sub-funcs for scanelf_file() */
72static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab) 70static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
73{ 71{
74 /* find the best SHT_DYNSYM and SHT_STRTAB sections */ 72 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
95 GET_SYMTABS(32) 93 GET_SYMTABS(32)
96 GET_SYMTABS(64) 94 GET_SYMTABS(64)
97} 95}
98static char *scanelf_file_pax(elfobj *elf, char *found_pax) 96static char *scanelf_file_pax(elfobj *elf, char *found_pax)
99{ 97{
100 static char *paxflags;
101 static char ret[7]; 98 static char ret[7];
102 unsigned long i, shown; 99 unsigned long i, shown;
103 100
104 if (!show_pax) return NULL; 101 if (!show_pax) return NULL;
105 102
126 SHOW_PAX(64) 123 SHOW_PAX(64)
127 } 124 }
128 125
129 /* fall back to EI_PAX if no PT_PAX was found */ 126 /* fall back to EI_PAX if no PT_PAX was found */
130 if (!*ret) { 127 if (!*ret) {
128 static char *paxflags;
131 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 129 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
132 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 130 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
133 *found_pax = 1; 131 *found_pax = 1;
134 return paxflags; 132 return (be_wewy_wewy_quiet ? NULL : paxflags);
135 } 133 }
136 strncpy(ret, paxflags, sizeof(ret)); 134 strncpy(ret, paxflags, sizeof(ret));
137 } 135 }
138 136
139 if (be_quiet && !shown) 137 if (be_wewy_wewy_quiet || (be_quiet && !shown))
140 return NULL; 138 return NULL;
139 else
141 return ret; 140 return ret;
142
143} 141}
142
144static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load) 143static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
145{ 144{
146 static char ret[12]; 145 static char ret[12];
147 char *found; 146 char *found;
148 unsigned long i, off, shown, check_flags;
149 unsigned char multi_stack, multi_relro, multi_load; 147 unsigned long i, shown, multi_stack, multi_relro, multi_load;
148 int max_pt_load;
150 149
151 if (!show_phdr) return NULL; 150 if (!show_phdr) return NULL;
152 151
153 memcpy(ret, "--- --- ---\0", 12); 152 memcpy(ret, "--- --- ---\0", 12);
154 153
155 shown = 0; 154 shown = 0;
156 multi_stack = multi_relro = multi_load = 0; 155 multi_stack = multi_relro = multi_load = 0;
156 max_pt_load = elf_max_pt_load(elf);
157 157
158 if (elf->phdr) { 158#define NOTE_GNU_STACK ".note.GNU-stack"
159#define SHOW_PHDR(B) \ 159#define SHOW_PHDR(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \ 160 if (elf->elf_class == ELFCLASS ## B) { \
161 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 161 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
162 Elf ## B ## _Off offset; \
163 uint32_t flags, check_flags; \
164 if (elf->phdr != NULL) { \
162 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 165 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
163 uint32_t flags; \
164 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 166 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
165 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 167 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
166 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \ 168 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
167 found = found_phdr; \ 169 found = found_phdr; \
168 off = 0; \ 170 offset = 0; \
169 check_flags = PF_X; \ 171 check_flags = PF_X; \
170 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \ 172 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
171 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \ 173 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
172 found = found_relro; \ 174 found = found_relro; \
173 off = 4; \ 175 offset = 4; \
174 check_flags = PF_X; \ 176 check_flags = PF_X; \
175 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \ 177 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
178 if (ehdr->e_type == ET_DYN || ehdr->e_type == ET_EXEC) \
176 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \ 179 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
177 found = found_load; \ 180 found = found_load; \
178 off = 8; \ 181 offset = 8; \
179 check_flags = PF_W|PF_X; \ 182 check_flags = PF_W|PF_X; \
180 } else \ 183 } else \
181 continue; \ 184 continue; \
182 flags = EGET(phdr[i].p_flags); \ 185 flags = EGET(phdr[i].p_flags); \
183 if (be_quiet && ((flags & check_flags) != check_flags)) \ 186 if (be_quiet && ((flags & check_flags) != check_flags)) \
184 continue; \ 187 continue; \
188 if (fix_elf && ((flags & PF_X) != flags)) { \
189 ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
190 ret[3] = ret[7] = '!'; \
191 flags = EGET(phdr[i].p_flags); \
192 } \
185 memcpy(ret+off, gnu_short_stack_flags(flags), 3); \ 193 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
186 *found = 1; \ 194 *found = 1; \
187 ++shown; \ 195 ++shown; \
196 } \
197 } else if (elf->shdr != NULL) { \
198 /* no program headers which means this is prob an object file */ \
199 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
200 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
201 char *str; \
202 if ((void*)strtbl > (void*)elf->data_end) \
203 goto skip_this_shdr##B; \
204 check_flags = SHF_WRITE|SHF_EXECINSTR; \
205 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
206 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
207 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
208 str = elf->data + offset; \
209 if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
210 if (!strcmp(str, NOTE_GNU_STACK)) { \
211 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
212 flags = EGET(shdr[i].sh_flags); \
213 if (be_quiet && ((flags & check_flags) != check_flags)) \
214 continue; \
215 ++*found_phdr; \
216 shown = 1; \
217 if (flags & SHF_WRITE) ret[0] = 'W'; \
218 if (flags & SHF_ALLOC) ret[1] = 'A'; \
219 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
220 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
221 break; \
222 } \
223 } \
224 skip_this_shdr##B: \
225 if (!multi_stack) { \
226 *found_phdr = 1; \
227 shown = 1; \
228 memcpy(ret, "!WX", 3); \
229 } \
188 } \ 230 } \
189 } 231 }
190 SHOW_PHDR(32) 232 SHOW_PHDR(32)
191 SHOW_PHDR(64) 233 SHOW_PHDR(64)
192 }
193 234
194 if (be_quiet && !shown) 235 if (be_wewy_wewy_quiet || (be_quiet && !shown))
195 return NULL; 236 return NULL;
196 else 237 else
197 return ret; 238 return ret;
198} 239}
199static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 240static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
200{ 241{
201 static char ret[] = "TEXTREL"; 242 static const char *ret = "TEXTREL";
202 unsigned long i; 243 unsigned long i;
203 244
204 if (!show_textrel && !show_textrels) return NULL; 245 if (!show_textrel && !show_textrels) return NULL;
205 246
206 if (elf->phdr) { 247 if (elf->phdr) {
229 } 270 }
230 271
231 if (be_quiet || be_wewy_wewy_quiet) 272 if (be_quiet || be_wewy_wewy_quiet)
232 return NULL; 273 return NULL;
233 else 274 else
234 return (char *)" - "; 275 return " - ";
235} 276}
236static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel) 277static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
237{ 278{
238 unsigned long s, r, rmax; 279 unsigned long s, r, rmax;
239 void *symtab_void, *strtab_void, *text_void; 280 void *symtab_void, *strtab_void, *text_void;
292 if (be_verbose <= 2) continue; \ 333 if (be_verbose <= 2) continue; \
293 } else \ 334 } else \
294 *found_textrels = 1; \ 335 *found_textrels = 1; \
295 /* locate this relocation symbol name */ \ 336 /* locate this relocation symbol name */ \
296 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 337 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
338 if ((void*)sym > (void*)elf->data_end) { \
339 warn("%s: corrupt ELF symbol", elf->filename); \
340 continue; \
341 } \
297 sym_max = ELF ## B ## _R_SYM(r_info); \ 342 sym_max = ELF ## B ## _R_SYM(r_info); \
298 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \ 343 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
299 sym += sym_max; \ 344 sym += sym_max; \
300 else \ 345 else \
301 sym = NULL; \ 346 sym = NULL; \
333 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename); 378 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
334 379
335 return NULL; 380 return NULL;
336} 381}
337 382
338static void rpath_security_checks(elfobj *, char *); 383static void rpath_security_checks(elfobj *, char *, const char *);
339static void rpath_security_checks(elfobj *elf, char *item) { 384static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
385{
340 struct stat st; 386 struct stat st;
341 switch (*item) { 387 switch (*item) {
388 case '/': break;
342 case 0: 389 case '.':
343 warnf("Security problem NULL RPATH in %s", elf->filename); 390 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
344 break; 391 break;
345 case '/': break; 392 case ':':
393 case '\0':
394 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
395 break;
346 case '$': 396 case '$':
347 if (fstat(elf->fd, &st) != -1) 397 if (fstat(elf->fd, &st) != -1)
348 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID)) 398 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
349 warnf("Security problem with RPATH='%s' in %s with mode set of %o", 399 warnf("Security problem with %s='%s' in %s with mode set of %o",
350 item, elf->filename, st.st_mode & 07777); 400 dt_type, item, elf->filename, st.st_mode & 07777);
351 break; 401 break;
352 default: 402 default:
353 warnf("Maybe? sec problem with RPATH='%s' in %s", item, elf->filename); 403 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
354 break; 404 break;
355 } 405 }
356} 406}
357static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 407static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
358{ 408{
394 /* Verify the memory is somewhat sane */ \ 444 /* Verify the memory is somewhat sane */ \
395 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 445 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
396 if (offset < (Elf ## B ## _Off)elf->len) { \ 446 if (offset < (Elf ## B ## _Off)elf->len) { \
397 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 447 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
398 *r = (char*)(elf->data + offset); \ 448 *r = (char*)(elf->data + offset); \
449 /* cache the length in case we need to nuke this section later on */ \
450 if (fix_elf) \
451 offset = strlen(*r); \
399 /* If quiet, don't output paths in ld.so.conf */ \ 452 /* If quiet, don't output paths in ld.so.conf */ \
400 if (be_quiet) { \ 453 if (be_quiet) { \
401 size_t len; \ 454 size_t len; \
402 char *start, *end; \ 455 char *start, *end; \
403 /* note that we only 'chop' off leading known paths. */ \ 456 /* note that we only 'chop' off leading known paths. */ \
404 /* since *r is read-only memory, we can only move the ptr forward. */ \ 457 /* since *r is read-only memory, we can only move the ptr forward. */ \
405 start = *r; \ 458 start = *r; \
406 /* scan each path in : delimited list */ \ 459 /* scan each path in : delimited list */ \
407 while (start) { \ 460 while (start) { \
408 rpath_security_checks(elf, start); \ 461 rpath_security_checks(elf, start, get_elfdtype(word)); \
409 end = strchr(start, ':'); \ 462 end = strchr(start, ':'); \
410 len = (end ? abs(end - start) : strlen(start)); \ 463 len = (end ? abs(end - start) : strlen(start)); \
464 if (use_ldcache) \
411 for (s = 0; ldpaths[s]; ++s) { \ 465 for (s = 0; ldpaths[s]; ++s) \
412 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \ 466 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
413 *r = (end ? end + 1 : NULL); \ 467 *r = end; \
468 /* corner case ... if RPATH reads "/usr/lib:", we want \
469 * to show ':' rather than '' */ \
470 if (end && end[1] != '\0') \
471 (*r)++; \
414 break; \ 472 break; \
415 } \ 473 } \
416 } \
417 if (!*r || !ldpaths[s] || !end) \ 474 if (!*r || !end) \
418 start = NULL; \ 475 break; \
419 else \ 476 else \
420 start = start + len + 1; \ 477 start = start + len + 1; \
421 } \ 478 } \
422 } \ 479 } \
480 if (*r) { \
481 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
482 /* just nuke it */ \
483 nuke_it##B: \
484 memset(*r, 0x00, offset); \
485 *r = NULL; \
486 ESET(dyn->d_tag, DT_DEBUG); \
487 ESET(dyn->d_un.d_ptr, 0); \
488 } else if (fix_elf) { \
489 /* try to clean "bad" paths */ \
490 size_t len, tmpdir_len; \
491 char *start, *end; \
492 const char *tmpdir; \
493 start = *r; \
494 tmpdir = (getenv("TMPDIR") ? : "."); \
495 tmpdir_len = strlen(tmpdir); \
496 while (1) { \
497 end = strchr(start, ':'); \
498 if (start == end) { \
499 eat_this_path##B: \
500 len = strlen(end); \
501 memmove(start, end+1, len); \
502 start[len-1] = '\0'; \
503 end = start - 1; \
504 } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
505 if (!end) { \
506 if (start == *r) \
507 goto nuke_it##B; \
508 *--start = '\0'; \
509 } else \
510 goto eat_this_path##B; \
511 } \
512 if (!end) \
513 break; \
514 start = end + 1; \
515 } \
516 if (**r == '\0') \
517 goto nuke_it##B; \
518 } \
519 if (*r) \
423 if (*r) *found_rpath = 1; \ 520 *found_rpath = 1; \
521 } \
424 } \ 522 } \
425 ++dyn; \ 523 ++dyn; \
426 } \ 524 } \
427 } } 525 } }
428 SHOW_RPATH(32) 526 SHOW_RPATH(32)
445 } else if (rpath || runpath) 543 } else if (rpath || runpath)
446 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 544 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
447 else if (!be_quiet) 545 else if (!be_quiet)
448 xstrcat(ret, " - ", ret_len); 546 xstrcat(ret, " - ", ret_len);
449} 547}
548
549#define LDSO_CACHE_MAGIC "ld.so-"
550#define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
551#define LDSO_CACHE_VER "1.7.0"
552#define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
553#define FLAG_ANY -1
554#define FLAG_TYPE_MASK 0x00ff
555#define FLAG_LIBC4 0x0000
556#define FLAG_ELF 0x0001
557#define FLAG_ELF_LIBC5 0x0002
558#define FLAG_ELF_LIBC6 0x0003
559#define FLAG_REQUIRED_MASK 0xff00
560#define FLAG_SPARC_LIB64 0x0100
561#define FLAG_IA64_LIB64 0x0200
562#define FLAG_X8664_LIB64 0x0300
563#define FLAG_S390_LIB64 0x0400
564#define FLAG_POWERPC_LIB64 0x0500
565#define FLAG_MIPS64_LIBN32 0x0600
566#define FLAG_MIPS64_LIBN64 0x0700
567
568static char *lookup_cache_lib(elfobj *, char *);
569static char *lookup_cache_lib(elfobj *elf, char *fname)
570{
571 int fd = 0;
572 char *strs;
573 static char buf[__PAX_UTILS_PATH_MAX] = "";
574 const char *cachefile = "/etc/ld.so.cache";
575 struct stat st;
576
577 typedef struct {
578 char magic[LDSO_CACHE_MAGIC_LEN];
579 char version[LDSO_CACHE_VER_LEN];
580 int nlibs;
581 } header_t;
582 header_t *header;
583
584 typedef struct {
585 int flags;
586 int sooffset;
587 int liboffset;
588 } libentry_t;
589 libentry_t *libent;
590
591 if (fname == NULL)
592 return NULL;
593
594 if (ldcache == 0) {
595 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
596 return NULL;
597
598 /* cache these values so we only map/unmap the cache file once */
599 ldcache_size = st.st_size;
600 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
601
602 close(fd);
603
604 if (ldcache == (caddr_t)-1) {
605 ldcache = 0;
606 return NULL;
607 }
608
609 if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
610 return NULL;
611 if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
612 return NULL;
613 }
614
615 header = (header_t *) ldcache;
616 libent = (libentry_t *) (ldcache + sizeof(header_t));
617 strs = (char *) &libent[header->nlibs];
618
619 for (fd = 0; fd < header->nlibs; fd++) {
620 /* this should be more fine grained, but for now we assume that
621 * diff arches will not be cached together. and we ignore the
622 * the different multilib mips cases. */
623 if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
624 continue;
625 if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
626 continue;
627
628 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
629 continue;
630 strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
631 }
632 return buf;
633}
634
635
450static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len) 636static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
451{ 637{
452 unsigned long i; 638 unsigned long i;
453 char *needed; 639 char *needed;
454 void *strtbl_void; 640 void *strtbl_void;
641 char *p;
455 642
456 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL; 643 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
457 644
458 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 645 strtbl_void = elf_findsecbyname(elf, ".dynstr");
459 646
479 } \ 666 } \
480 needed = (char*)(elf->data + offset); \ 667 needed = (char*)(elf->data + offset); \
481 if (op == 0) { \ 668 if (op == 0) { \
482 if (!be_wewy_wewy_quiet) { \ 669 if (!be_wewy_wewy_quiet) { \
483 if (*found_needed) xchrcat(ret, ',', ret_len); \ 670 if (*found_needed) xchrcat(ret, ',', ret_len); \
671 if (use_ldcache) \
672 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
673 needed = p; \
484 xstrcat(ret, needed, ret_len); \ 674 xstrcat(ret, needed, ret_len); \
485 } \ 675 } \
486 *found_needed = 1; \ 676 *found_needed = 1; \
487 } else { \ 677 } else { \
488 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \ 678 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
612 return NULL; 802 return NULL;
613} 803}
614static char *scanelf_file_sym(elfobj *elf, char *found_sym) 804static char *scanelf_file_sym(elfobj *elf, char *found_sym)
615{ 805{
616 unsigned long i; 806 unsigned long i;
807 char *ret;
617 void *symtab_void, *strtab_void; 808 void *symtab_void, *strtab_void;
618 809
619 if (!find_sym) return NULL; 810 if (!find_sym) return NULL;
811 ret = find_sym;
620 812
621 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void); 813 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
622 814
623 if (symtab_void && strtab_void) { 815 if (symtab_void && strtab_void) {
624#define FIND_SYM(B) \ 816#define FIND_SYM(B) \
625 if (elf->elf_class == ELFCLASS ## B) { \ 817 if (elf->elf_class == ELFCLASS ## B) { \
626 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 818 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
627 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 819 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
628 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 820 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
629 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 821 unsigned long cnt = EGET(symtab->sh_entsize); \
630 char *symname; \ 822 char *symname; \
823 if (cnt) \
824 cnt = EGET(symtab->sh_size) / cnt; \
631 for (i = 0; i < cnt; ++i) { \ 825 for (i = 0; i < cnt; ++i) { \
632 if (sym->st_name) { \ 826 if (sym->st_name) { \
633 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 827 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
828 if ((void*)symname > (void*)elf->data_end) { \
829 warnf("%s: corrupt ELF symbols", elf->filename); \
830 continue; \
831 } \
634 if (*find_sym == '*') { \ 832 if (*find_sym == '*') { \
635 printf("%s(%s) %5lX %15s %s\n", \ 833 printf("%s(%s) %5lX %15s %s\n", \
636 ((*found_sym == 0) ? "\n\t" : "\t"), \ 834 ((*found_sym == 0) ? "\n\t" : "\t"), \
637 elf->base_filename, \ 835 elf->base_filename, \
638 (long)sym->st_size, \ 836 (unsigned long)sym->st_size, \
639 (char *)get_elfstttype(sym->st_info), \ 837 get_elfstttype(sym->st_info), \
640 symname); \ 838 symname); \
641 *found_sym = 1; \ 839 *found_sym = 1; \
642 } else if ((strcmp(find_sym, symname) == 0) || \ 840 } else { \
841 char *this_sym, *next_sym; \
842 this_sym = find_sym; \
843 do { \
844 next_sym = strchr(this_sym, ','); \
845 if (next_sym == NULL) \
846 next_sym = this_sym + strlen(this_sym); \
847 if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
643 (strcmp(symname, versioned_symname) == 0)) \ 848 (strcmp(symname, versioned_symname) == 0)) { \
849 ret = this_sym; \
644 (*found_sym)++; \ 850 (*found_sym)++; \
851 goto break_out; \
852 } \
853 this_sym = next_sym + 1; \
854 } while (*next_sym != '\0'); \
855 } \
645 } \ 856 } \
646 ++sym; \ 857 ++sym; \
647 } } 858 } }
648 FIND_SYM(32) 859 FIND_SYM(32)
649 FIND_SYM(64) 860 FIND_SYM(64)
650 } 861 }
651 862
863break_out:
652 if (be_wewy_wewy_quiet) return NULL; 864 if (be_wewy_wewy_quiet) return NULL;
653 865
654 if (*find_sym != '*' && *found_sym) 866 if (*find_sym != '*' && *found_sym)
655 return find_sym; 867 return ret;
656 if (be_quiet) 868 if (be_quiet)
657 return NULL; 869 return NULL;
658 else 870 else
659 return (char *)" - "; 871 return (char *)" - ";
660} 872}
873
874
661/* scan an elf file and show all the fun stuff */ 875/* scan an elf file and show all the fun stuff */
662#define prints(str) write(fileno(stdout), str, strlen(str)) 876#define prints(str) write(fileno(stdout), str, strlen(str))
663static void scanelf_file(const char *filename) 877static int scanelf_elfobj(elfobj *elf)
664{ 878{
665 unsigned long i; 879 unsigned long i;
666 char found_pax, found_phdr, found_relro, found_load, found_textrel, 880 char found_pax, found_phdr, found_relro, found_load, found_textrel,
667 found_rpath, found_needed, found_interp, found_bind, found_soname, 881 found_rpath, found_needed, found_interp, found_bind, found_soname,
668 found_sym, found_lib, found_file, found_textrels; 882 found_sym, found_lib, found_file, found_textrels;
669 elfobj *elf;
670 struct stat st;
671 static char *out_buffer = NULL; 883 static char *out_buffer = NULL;
672 static size_t out_len; 884 static size_t out_len;
673
674 /* make sure 'filename' exists */
675 if (lstat(filename, &st) == -1) {
676 if (be_verbose > 2) printf("%s: does not exist\n", filename);
677 return;
678 }
679 /* always handle regular files and handle symlinked files if no -y */
680 if (S_ISLNK(st.st_mode)) {
681 if (!scan_symlink) return;
682 stat(filename, &st);
683 }
684 if (!S_ISREG(st.st_mode)) {
685 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
686 return;
687 }
688 885
689 found_pax = found_phdr = found_relro = found_load = found_textrel = \ 886 found_pax = found_phdr = found_relro = found_load = found_textrel = \
690 found_rpath = found_needed = found_interp = found_bind = found_soname = \ 887 found_rpath = found_needed = found_interp = found_bind = found_soname = \
691 found_sym = found_lib = found_file = found_textrels = 0; 888 found_sym = found_lib = found_file = found_textrels = 0;
692 889
693 /* verify this is real ELF */
694 if ((elf = readelf(filename)) == NULL) {
695 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
696 return;
697 }
698
699 if (be_verbose > 1) 890 if (be_verbose > 2)
700 printf("%s: scanning file {%s,%s}\n", filename, 891 printf("%s: scanning file {%s,%s}\n", elf->filename,
701 get_elfeitype(EI_CLASS, elf->elf_class), 892 get_elfeitype(EI_CLASS, elf->elf_class),
702 get_elfeitype(EI_DATA, elf->data[EI_DATA])); 893 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
703 else if (be_verbose) 894 else if (be_verbose > 1)
704 printf("%s: scanning file\n", filename); 895 printf("%s: scanning file\n", elf->filename);
705 896
706 /* init output buffer */ 897 /* init output buffer */
707 if (!out_buffer) { 898 if (!out_buffer) {
708 out_len = sizeof(char) * 80; 899 out_len = sizeof(char) * 80;
709 out_buffer = (char*)xmalloc(out_len); 900 out_buffer = (char*)xmalloc(out_len);
763 case '#': 954 case '#':
764 xchrcat(&out_buffer, out_format[i], &out_len); break; 955 xchrcat(&out_buffer, out_format[i], &out_len); break;
765 case 'F': 956 case 'F':
766 found_file = 1; 957 found_file = 1;
767 if (be_wewy_wewy_quiet) break; 958 if (be_wewy_wewy_quiet) break;
768 xstrcat(&out_buffer, filename, &out_len); 959 xstrcat(&out_buffer, elf->filename, &out_len);
769 break; 960 break;
770 case 'p': 961 case 'p':
771 found_file = 1; 962 found_file = 1;
772 if (be_wewy_wewy_quiet) break; 963 if (be_wewy_wewy_quiet) break;
773 tmp = filename; 964 tmp = elf->filename;
774 if (search_path) { 965 if (search_path) {
775 ssize_t len_search = strlen(search_path); 966 ssize_t len_search = strlen(search_path);
776 ssize_t len_file = strlen(filename); 967 ssize_t len_file = strlen(elf->filename);
777 if (!strncmp(filename, search_path, len_search) && \ 968 if (!strncmp(elf->filename, search_path, len_search) && \
778 len_file > len_search) 969 len_file > len_search)
779 tmp += len_search; 970 tmp += len_search;
780 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++; 971 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
781 } 972 }
782 xstrcat(&out_buffer, tmp, &out_len); 973 xstrcat(&out_buffer, tmp, &out_len);
783 break; 974 break;
784 case 'f': 975 case 'f':
785 found_file = 1; 976 found_file = 1;
786 if (be_wewy_wewy_quiet) break; 977 if (be_wewy_wewy_quiet) break;
787 tmp = strrchr(filename, '/'); 978 tmp = strrchr(elf->filename, '/');
788 tmp = (tmp == NULL ? filename : tmp+1); 979 tmp = (tmp == NULL ? elf->filename : tmp+1);
789 xstrcat(&out_buffer, tmp, &out_len); 980 xstrcat(&out_buffer, tmp, &out_len);
790 break; 981 break;
791 case 'o': out = get_elfetype(elf); break; 982 case 'o': out = get_elfetype(elf); break;
792 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 983 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
793 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break; 984 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
800 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 991 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
801 case 'S': out = scanelf_file_soname(elf, &found_soname); break; 992 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
802 case 's': out = scanelf_file_sym(elf, &found_sym); break; 993 case 's': out = scanelf_file_sym(elf, &found_sym); break;
803 default: warnf("'%c' has no scan code?", out_format[i]); 994 default: warnf("'%c' has no scan code?", out_format[i]);
804 } 995 }
996 if (out) {
997 /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
998 if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
999 xstrncat(&out_buffer, out, &out_len, (tmp-out));
1000 else
805 if (out) xstrcat(&out_buffer, out, &out_len); 1001 xstrcat(&out_buffer, out, &out_len);
1002 }
806 } 1003 }
807 1004
808#define FOUND_SOMETHING() \ 1005#define FOUND_SOMETHING() \
809 (found_pax || found_phdr || found_relro || found_load || found_textrel || \ 1006 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
810 found_rpath || found_needed || found_interp || found_bind || \ 1007 found_rpath || found_needed || found_interp || found_bind || \
811 found_soname || found_sym || found_lib || found_textrels) 1008 found_soname || found_sym || found_lib || found_textrels)
812 1009
813 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 1010 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
814 xchrcat(&out_buffer, ' ', &out_len); 1011 xchrcat(&out_buffer, ' ', &out_len);
815 xstrcat(&out_buffer, filename, &out_len); 1012 xstrcat(&out_buffer, elf->filename, &out_len);
816 } 1013 }
817 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) { 1014 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
818 puts(out_buffer); 1015 puts(out_buffer);
819 fflush(stdout); 1016 fflush(stdout);
820 } 1017 }
821 1018
1019 return 0;
1020}
1021
1022/* scan a single elf */
1023static int scanelf_elf(const char *filename, int fd, size_t len)
1024{
1025 int ret;
1026 elfobj *elf;
1027
1028 /* verify this is real ELF */
1029 if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1030 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1031 return 1;
1032 }
1033
1034 if (strlen(match_etypes)) {
1035 char sbuf[126];
1036 strncpy(sbuf, match_etypes, sizeof(sbuf));
1037 if (strchr(match_etypes, ',') != NULL) {
1038 char *p;
1039 while((p = strrchr(sbuf, ',')) != NULL) {
1040 *p = 0;
1041 if (atoi(p+1) == get_etype(elf))
1042 goto label_ret;
1043 }
1044 }
1045 if (atoi(sbuf) != get_etype(elf)) {
1046 ret = 1;
1047 goto label_done;
1048 }
1049 }
1050
1051label_ret:
1052 ret = scanelf_elfobj(elf);
1053
1054label_done:
822 unreadelf(elf); 1055 unreadelf(elf);
1056 return ret;
1057}
1058
1059/* scan an archive of elfs */
1060static int scanelf_archive(const char *filename, int fd, size_t len)
1061{
1062 archive_handle *ar;
1063 archive_member *m;
1064 char *ar_buffer;
1065 elfobj *elf;
1066
1067 ar = ar_open_fd(filename, fd);
1068 if (ar == NULL)
1069 return 1;
1070
1071 ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1072 while ((m=ar_next(ar)) != NULL) {
1073 elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1074 if (elf) {
1075 scanelf_elfobj(elf);
1076 unreadelf(elf);
1077 }
1078 }
1079 munmap(ar_buffer, len);
1080
1081 return 0;
1082}
1083/* scan a file which may be an elf or an archive or some other magical beast */
1084static void scanelf_file(const char *filename)
1085{
1086 struct stat st;
1087 int fd;
1088
1089 /* make sure 'filename' exists */
1090 if (lstat(filename, &st) == -1) {
1091 if (be_verbose > 2) printf("%s: does not exist\n", filename);
1092 return;
1093 }
1094
1095 /* always handle regular files and handle symlinked files if no -y */
1096 if (S_ISLNK(st.st_mode)) {
1097 if (!scan_symlink) return;
1098 stat(filename, &st);
1099 }
1100 if (!S_ISREG(st.st_mode)) {
1101 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1102 return;
1103 }
1104
1105 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1106 return;
1107
1108 if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives)
1109 /* if it isn't an ELF, maybe it's an .a archive */
1110 scanelf_archive(filename, fd, st.st_size);
1111
1112 close(fd);
823} 1113}
824 1114
825/* scan a directory for ET_EXEC files and print when we find one */ 1115/* scan a directory for ET_EXEC files and print when we find one */
826static void scanelf_dir(const char *path) 1116static void scanelf_dir(const char *path)
827{ 1117{
828 register DIR *dir; 1118 register DIR *dir;
829 register struct dirent *dentry; 1119 register struct dirent *dentry;
830 struct stat st_top, st; 1120 struct stat st_top, st;
831 char buf[_POSIX_PATH_MAX]; 1121 char buf[__PAX_UTILS_PATH_MAX];
832 size_t pathlen = 0, len = 0; 1122 size_t pathlen = 0, len = 0;
833 1123
834 /* make sure path exists */ 1124 /* make sure path exists */
835 if (lstat(path, &st_top) == -1) { 1125 if (lstat(path, &st_top) == -1) {
836 if (be_verbose > 2) printf("%s: does not exist\n", path); 1126 if (be_verbose > 2) printf("%s: does not exist\n", path);
846 /* now scan the dir looking for fun stuff */ 1136 /* now scan the dir looking for fun stuff */
847 if ((dir = opendir(path)) == NULL) { 1137 if ((dir = opendir(path)) == NULL) {
848 warnf("could not opendir %s: %s", path, strerror(errno)); 1138 warnf("could not opendir %s: %s", path, strerror(errno));
849 return; 1139 return;
850 } 1140 }
851 if (be_verbose) printf("%s: scanning dir\n", path); 1141 if (be_verbose > 1) printf("%s: scanning dir\n", path);
852 1142
853 pathlen = strlen(path); 1143 pathlen = strlen(path);
854 while ((dentry = readdir(dir))) { 1144 while ((dentry = readdir(dir))) {
855 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 1145 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
856 continue; 1146 continue;
875 1165
876static int scanelf_from_file(char *filename) 1166static int scanelf_from_file(char *filename)
877{ 1167{
878 FILE *fp = NULL; 1168 FILE *fp = NULL;
879 char *p; 1169 char *p;
880 char path[_POSIX_PATH_MAX]; 1170 char path[__PAX_UTILS_PATH_MAX];
881 1171
882 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL)) 1172 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
883 fp = stdin; 1173 fp = stdin;
884 else if ((fp = fopen(filename, "r")) == NULL) 1174 else if ((fp = fopen(filename, "r")) == NULL)
885 return 1; 1175 return 1;
886 1176
887 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1177 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
888 if ((p = strchr(path, '\n')) != NULL) 1178 if ((p = strchr(path, '\n')) != NULL)
889 *p = 0; 1179 *p = 0;
890 search_path = path; 1180 search_path = path;
891 scanelf_dir(path); 1181 scanelf_dir(path);
892 } 1182 }
897 1187
898static void load_ld_so_conf() 1188static void load_ld_so_conf()
899{ 1189{
900 FILE *fp = NULL; 1190 FILE *fp = NULL;
901 char *p; 1191 char *p;
902 char path[_POSIX_PATH_MAX]; 1192 char path[__PAX_UTILS_PATH_MAX];
903 int i = 0; 1193 int i = 0;
904 1194
905 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 1195 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
906 return; 1196 return;
907 1197
908 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 1198 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
909 if (*path != '/') 1199 if (*path != '/')
910 continue; 1200 continue;
911 1201
912 if ((p = strrchr(path, '\r')) != NULL) 1202 if ((p = strrchr(path, '\r')) != NULL)
913 *p = 0; 1203 *p = 0;
965 1255
966 free(path); 1256 free(path);
967} 1257}
968 1258
969 1259
970
971/* usage / invocation handling functions */ 1260/* usage / invocation handling functions */
972#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV" 1261#define PARSE_FLAGS "plRmyAXxetrnLibSs:gN:TaqvF:f:o:E:BhV"
973#define a_argument required_argument 1262#define a_argument required_argument
974static struct option const long_opts[] = { 1263static struct option const long_opts[] = {
975 {"path", no_argument, NULL, 'p'}, 1264 {"path", no_argument, NULL, 'p'},
976 {"ldpath", no_argument, NULL, 'l'}, 1265 {"ldpath", no_argument, NULL, 'l'},
977 {"recursive", no_argument, NULL, 'R'}, 1266 {"recursive", no_argument, NULL, 'R'},
978 {"mount", no_argument, NULL, 'm'}, 1267 {"mount", no_argument, NULL, 'm'},
979 {"symlink", no_argument, NULL, 'y'}, 1268 {"symlink", no_argument, NULL, 'y'},
1269 {"archives", no_argument, NULL, 'A'},
1270 {"ldcache", no_argument, NULL, 'L'},
1271 {"fix", no_argument, NULL, 'X'},
980 {"pax", no_argument, NULL, 'x'}, 1272 {"pax", no_argument, NULL, 'x'},
981 {"header", no_argument, NULL, 'e'}, 1273 {"header", no_argument, NULL, 'e'},
982 {"textrel", no_argument, NULL, 't'}, 1274 {"textrel", no_argument, NULL, 't'},
983 {"rpath", no_argument, NULL, 'r'}, 1275 {"rpath", no_argument, NULL, 'r'},
984 {"needed", no_argument, NULL, 'n'}, 1276 {"needed", no_argument, NULL, 'n'},
987 {"soname", no_argument, NULL, 'S'}, 1279 {"soname", no_argument, NULL, 'S'},
988 {"symbol", a_argument, NULL, 's'}, 1280 {"symbol", a_argument, NULL, 's'},
989 {"lib", a_argument, NULL, 'N'}, 1281 {"lib", a_argument, NULL, 'N'},
990 {"gmatch", no_argument, NULL, 'g'}, 1282 {"gmatch", no_argument, NULL, 'g'},
991 {"textrels", no_argument, NULL, 'T'}, 1283 {"textrels", no_argument, NULL, 'T'},
1284 {"etype", a_argument, NULL, 'E'},
992 {"all", no_argument, NULL, 'a'}, 1285 {"all", no_argument, NULL, 'a'},
993 {"quiet", no_argument, NULL, 'q'}, 1286 {"quiet", no_argument, NULL, 'q'},
994 {"verbose", no_argument, NULL, 'v'}, 1287 {"verbose", no_argument, NULL, 'v'},
995 {"format", a_argument, NULL, 'F'}, 1288 {"format", a_argument, NULL, 'F'},
996 {"from", a_argument, NULL, 'f'}, 1289 {"from", a_argument, NULL, 'f'},
1004static const char *opts_help[] = { 1297static const char *opts_help[] = {
1005 "Scan all directories in PATH environment", 1298 "Scan all directories in PATH environment",
1006 "Scan all directories in /etc/ld.so.conf", 1299 "Scan all directories in /etc/ld.so.conf",
1007 "Scan directories recursively", 1300 "Scan directories recursively",
1008 "Don't recursively cross mount points", 1301 "Don't recursively cross mount points",
1009 "Don't scan symlinks\n", 1302 "Don't scan symlinks",
1303 "Scan archives (.a files)",
1304 "Utilize ld.so.cache information (use with -r/-n)",
1305 "Try and 'fix' bad things (use with -r/-e)\n",
1010 "Print PaX markings", 1306 "Print PaX markings",
1011 "Print GNU_STACK/PT_LOAD markings", 1307 "Print GNU_STACK/PT_LOAD markings",
1012 "Print TEXTREL information", 1308 "Print TEXTREL information",
1013 "Print RPATH information", 1309 "Print RPATH information",
1014 "Print NEEDED information", 1310 "Print NEEDED information",
1017 "Print SONAME information", 1313 "Print SONAME information",
1018 "Find a specified symbol", 1314 "Find a specified symbol",
1019 "Find a specified library", 1315 "Find a specified library",
1020 "Use strncmp to match libraries. (use with -N)", 1316 "Use strncmp to match libraries. (use with -N)",
1021 "Locate cause of TEXTREL", 1317 "Locate cause of TEXTREL",
1318 "Print only ELF files matching numeric constant",
1022 "Print all scanned info (-x -e -t -r -b)\n", 1319 "Print all scanned info (-x -e -t -r -b)\n",
1023 "Only output 'bad' things", 1320 "Only output 'bad' things",
1024 "Be verbose (can be specified more than once)", 1321 "Be verbose (can be specified more than once)",
1025 "Use specified format for output", 1322 "Use specified format for output",
1026 "Read input stream from a filename", 1323 "Read input stream from a filename",
1034/* display usage and exit */ 1331/* display usage and exit */
1035static void usage(int status) 1332static void usage(int status)
1036{ 1333{
1037 unsigned long i; 1334 unsigned long i;
1038 printf("* Scan ELF binaries for stuff\n\n" 1335 printf("* Scan ELF binaries for stuff\n\n"
1039 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1336 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1040 printf("Options: -[%s]\n", PARSE_FLAGS); 1337 printf("Options: -[%s]\n", PARSE_FLAGS);
1041 for (i = 0; long_opts[i].name; ++i) 1338 for (i = 0; long_opts[i].name; ++i)
1042 if (long_opts[i].has_arg == no_argument) 1339 if (long_opts[i].has_arg == no_argument)
1043 printf(" -%c, --%-13s* %s\n", long_opts[i].val, 1340 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
1044 long_opts[i].name, opts_help[i]); 1341 long_opts[i].name, opts_help[i]);
1078 VERSION, __FILE__, __DATE__, rcsid, argv0); 1375 VERSION, __FILE__, __DATE__, rcsid, argv0);
1079 exit(EXIT_SUCCESS); 1376 exit(EXIT_SUCCESS);
1080 break; 1377 break;
1081 case 'h': usage(EXIT_SUCCESS); break; 1378 case 'h': usage(EXIT_SUCCESS); break;
1082 case 'f': 1379 case 'f':
1083 if (from_file) err("Don't specify -f twice"); 1380 if (from_file) warn("You prob don't want to specify -f twice");
1084 from_file = xstrdup(optarg); 1381 from_file = optarg;
1382 break;
1383 case 'E':
1384 strncpy(match_etypes, optarg, sizeof(match_etypes));
1085 break; 1385 break;
1086 case 'o': { 1386 case 'o': {
1087 FILE *fp = NULL; 1387 FILE *fp = NULL;
1088 if ((fp = freopen(optarg, "w", stdout)) == NULL) 1388 if ((fp = freopen(optarg, "w", stdout)) == NULL)
1089 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1389 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1090 SET_STDOUT(fp); 1390 SET_STDOUT(fp);
1091 break; 1391 break;
1092 } 1392 }
1093 1393
1094 case 's': { 1394 case 's': {
1095 size_t len;
1096 if (find_sym) err("Don't specify -s twice"); 1395 if (find_sym) warn("You prob don't want to specify -s twice");
1097 find_sym = xstrdup(optarg); 1396 find_sym = optarg;
1098 len = strlen(find_sym) + 1;
1099 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1397 versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1100 sprintf(versioned_symname, "%s@", find_sym); 1398 sprintf(versioned_symname, "%s@", find_sym);
1101 break; 1399 break;
1102 } 1400 }
1103 case 'N': { 1401 case 'N': {
1104 if (find_lib) err("Don't specify -N twice"); 1402 if (find_lib) warn("You prob don't want to specify -N twice");
1105 find_lib = xstrdup(optarg); 1403 find_lib = optarg;
1106 break; 1404 break;
1107 } 1405 }
1108 1406
1109 case 'F': { 1407 case 'F': {
1110 if (out_format) err("Don't specify -F twice"); 1408 if (out_format) warn("You prob don't want to specify -F twice");
1111 out_format = xstrdup(optarg); 1409 out_format = optarg;
1112 break; 1410 break;
1113 } 1411 }
1114 1412
1115 case 'g': gmatch = 1; 1413 case 'g': gmatch = 1; /* break; any reason we dont breal; here ? */
1414 case 'L': use_ldcache = 1; break;
1116 case 'y': scan_symlink = 0; break; 1415 case 'y': scan_symlink = 0; break;
1416 case 'A': scan_archives = 1; break;
1117 case 'B': show_banner = 0; break; 1417 case 'B': show_banner = 0; break;
1118 case 'l': scan_ldpath = 1; break; 1418 case 'l': scan_ldpath = 1; break;
1119 case 'p': scan_envpath = 1; break; 1419 case 'p': scan_envpath = 1; break;
1120 case 'R': dir_recurse = 1; break; 1420 case 'R': dir_recurse = 1; break;
1121 case 'm': dir_crossmount = 0; break; 1421 case 'm': dir_crossmount = 0; break;
1422 case 'X': ++fix_elf; break;
1122 case 'x': show_pax = 1; break; 1423 case 'x': show_pax = 1; break;
1123 case 'e': show_phdr = 1; break; 1424 case 'e': show_phdr = 1; break;
1124 case 't': show_textrel = 1; break; 1425 case 't': show_textrel = 1; break;
1125 case 'r': show_rpath = 1; break; 1426 case 'r': show_rpath = 1; break;
1126 case 'n': show_needed = 1; break; 1427 case 'n': show_needed = 1; break;
1131 case 'q': be_quiet = 1; break; 1432 case 'q': be_quiet = 1; break;
1132 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1433 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1133 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break; 1434 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
1134 1435
1135 case ':': 1436 case ':':
1136 err("Option missing parameter\n"); 1437 err("Option '%c' is missing parameter", optopt);
1137 case '?': 1438 case '?':
1138 err("Unknown option\n"); 1439 err("Unknown option '%c' or argument missing", optopt);
1139 default: 1440 default:
1140 err("Unhandled option '%c'", i); 1441 err("Unhandled option '%c'; please report this", i);
1141 } 1442 }
1142 } 1443 }
1143 1444
1144 /* let the format option override all other options */ 1445 /* let the format option override all other options */
1145 if (out_format) { 1446 if (out_format) {
1192 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1493 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1193 } 1494 }
1194 if (be_verbose > 2) printf("Format: %s\n", out_format); 1495 if (be_verbose > 2) printf("Format: %s\n", out_format);
1195 1496
1196 /* now lets actually do the scanning */ 1497 /* now lets actually do the scanning */
1197 if (scan_ldpath || (show_rpath && be_quiet)) 1498 if (scan_ldpath || use_ldcache)
1198 load_ld_so_conf(); 1499 load_ld_so_conf();
1199 if (scan_ldpath) scanelf_ldpath(); 1500 if (scan_ldpath) scanelf_ldpath();
1200 if (scan_envpath) scanelf_envpath(); 1501 if (scan_envpath) scanelf_envpath();
1201 if (from_file) { 1502 if (from_file) {
1202 scanelf_from_file(from_file); 1503 scanelf_from_file(from_file);
1203 free(from_file);
1204 from_file = *argv; 1504 from_file = *argv;
1205 } 1505 }
1206 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1506 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1207 err("Nothing to scan !?"); 1507 err("Nothing to scan !?");
1208 while (optind < argc) { 1508 while (optind < argc) {
1209 search_path = argv[optind++]; 1509 search_path = argv[optind++];
1210 scanelf_dir(search_path); 1510 scanelf_dir(search_path);
1211 } 1511 }
1212 1512
1213 /* clean up */ 1513 /* clean up */
1214 if (find_sym) { 1514 if (versioned_symname) free(versioned_symname);
1215 free(find_sym);
1216 free(versioned_symname);
1217 }
1218 if (find_lib) free(find_lib);
1219 if (out_format) free(out_format);
1220 for (i = 0; ldpaths[i]; ++i) 1515 for (i = 0; ldpaths[i]; ++i)
1221 free(ldpaths[i]); 1516 free(ldpaths[i]);
1517
1518 if (ldcache != 0)
1519 munmap(ldcache, ldcache_size);
1222} 1520}
1223 1521
1224 1522
1225 1523
1226/* utility funcs */ 1524/* utility funcs */
1228{ 1526{
1229 char *ret = strdup(s); 1527 char *ret = strdup(s);
1230 if (!ret) err("Could not strdup(): %s", strerror(errno)); 1528 if (!ret) err("Could not strdup(): %s", strerror(errno));
1231 return ret; 1529 return ret;
1232} 1530}
1233
1234static void *xmalloc(size_t size) 1531static void *xmalloc(size_t size)
1235{ 1532{
1236 void *ret = malloc(size); 1533 void *ret = malloc(size);
1237 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size); 1534 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1238 return ret; 1535 return ret;
1239} 1536}
1240
1241static void xstrcat(char **dst, const char *src, size_t *curr_len) 1537static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1242{ 1538{
1243 size_t new_len; 1539 size_t new_len;
1244 1540
1245 new_len = strlen(*dst) + strlen(src); 1541 new_len = strlen(*dst) + strlen(src);
1246 if (*curr_len <= new_len) { 1542 if (*curr_len <= new_len) {
1247 *curr_len = new_len + (*curr_len / 2); 1543 *curr_len = new_len + (*curr_len / 2);
1248 *dst = realloc(*dst, *curr_len); 1544 *dst = realloc(*dst, *curr_len);
1249 if (!*dst) 1545 if (!*dst)
1250 err("could not realloc %li bytes", (unsigned long)*curr_len); 1546 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1251 } 1547 }
1252 1548
1549 if (n)
1550 strncat(*dst, src, n);
1551 else
1253 strcat(*dst, src); 1552 strcat(*dst, src);
1254} 1553}
1255
1256static inline void xchrcat(char **dst, const char append, size_t *curr_len) 1554static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1257{ 1555{
1258 static char my_app[2]; 1556 static char my_app[2];
1259 my_app[0] = append; 1557 my_app[0] = append;
1260 my_app[1] = '\0'; 1558 my_app[1] = '\0';

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