/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.63 Revision 1.91
1/* 1/*
2 * Copyright 2003-2005 Gentoo Foundation 2 * Copyright 2003-2005 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 1.63 2005/05/29 18:44:48 solar Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.91 2005/12/07 01:04:52 vapier Exp $
5 * 5 *
6 ******************************************************************** 6 * Copyright 2003-2005 Ned Ludd - <solar@gentoo.org>
7 * This program is free software; you can redistribute it and/or 7 * Copyright 2004-2005 Mike Frysinger - <vapier@gentoo.org>
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 * MA 02111-1307, USA.
21 */ 8 */
22 9
23#include <stdio.h> 10#include <stdio.h>
24#include <stdlib.h> 11#include <stdlib.h>
25#include <sys/types.h> 12#include <sys/types.h>
31#include <unistd.h> 18#include <unistd.h>
32#include <sys/stat.h> 19#include <sys/stat.h>
33#include <dirent.h> 20#include <dirent.h>
34#include <getopt.h> 21#include <getopt.h>
35#include <assert.h> 22#include <assert.h>
36#include "paxelf.h" 23#include "paxinc.h"
37 24
38static const char *rcsid = "$Id: scanelf.c,v 1.63 2005/05/29 18:44:48 solar Exp $"; 25static const char *rcsid = "$Id: scanelf.c,v 1.91 2005/12/07 01:04:52 vapier Exp $";
39#define argv0 "scanelf" 26#define argv0 "scanelf"
27
28#define IS_MODIFIER(c) (c == '%' || c == '#')
40 29
41 30
42 31
43/* prototypes */ 32/* prototypes */
44static void scanelf_file(const char *filename); 33static void scanelf_file(const char *filename);
58static char scan_envpath = 0; 47static char scan_envpath = 0;
59static char scan_symlink = 1; 48static char scan_symlink = 1;
60static char dir_recurse = 0; 49static char dir_recurse = 0;
61static char dir_crossmount = 1; 50static char dir_crossmount = 1;
62static char show_pax = 0; 51static char show_pax = 0;
63static char show_stack = 0; 52static char show_phdr = 0;
64static char show_textrel = 0; 53static char show_textrel = 0;
65static char show_rpath = 0; 54static char show_rpath = 0;
66static char show_needed = 0; 55static char show_needed = 0;
67static char show_interp = 0; 56static char show_interp = 0;
68static char show_bind = 0; 57static char show_bind = 0;
58static char show_soname = 0;
59static char show_textrels = 0;
69static char show_banner = 1; 60static char show_banner = 1;
70static char be_quiet = 0; 61static char be_quiet = 0;
71static char be_verbose = 0; 62static char be_verbose = 0;
63static char be_wewy_wewy_quiet = 0;
72static char *find_sym = NULL, *versioned_symname = NULL; 64static char *find_sym = NULL, *versioned_symname = NULL;
65static char *find_lib = NULL;
73static char *out_format = NULL; 66static char *out_format = NULL;
67static char *search_path = NULL;
68static char gmatch = 0;
74 69
75 70
76/* sub-funcs for scanelf_file() */ 71/* sub-funcs for scanelf_file() */
72static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
73{
74 /* find the best SHT_DYNSYM and SHT_STRTAB sections */
75#define GET_SYMTABS(B) \
76 if (elf->elf_class == ELFCLASS ## B) { \
77 Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
78 /* debug sections */ \
79 symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
80 strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
81 /* runtime sections */ \
82 dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
83 dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
84 if (symtab && dynsym) { \
85 *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
86 } else { \
87 *sym = (void*)(symtab ? symtab : dynsym); \
88 } \
89 if (strtab && dynstr) { \
90 *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
91 } else { \
92 *tab = (void*)(strtab ? strtab : dynstr); \
93 } \
94 }
95 GET_SYMTABS(32)
96 GET_SYMTABS(64)
97}
77static char *scanelf_file_pax(elfobj *elf, char *found_pax) 98static char *scanelf_file_pax(elfobj *elf, char *found_pax)
78{ 99{
79 static char *paxflags;
80 static char ret[7]; 100 static char ret[7];
81 unsigned long i, shown; 101 unsigned long i, shown;
82
83 102
84 if (!show_pax) return NULL; 103 if (!show_pax) return NULL;
85 104
86 shown = 0; 105 shown = 0;
87 memset(&ret, 0, sizeof(ret)); 106 memset(&ret, 0, sizeof(ret));
106 SHOW_PAX(64) 125 SHOW_PAX(64)
107 } 126 }
108 127
109 /* fall back to EI_PAX if no PT_PAX was found */ 128 /* fall back to EI_PAX if no PT_PAX was found */
110 if (!*ret) { 129 if (!*ret) {
130 static char *paxflags;
111 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf)); 131 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
112 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) { 132 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
113 *found_pax = 1; 133 *found_pax = 1;
114 return paxflags; 134 return (be_wewy_wewy_quiet ? NULL : paxflags);
115 } 135 }
116 strncpy(ret, paxflags, sizeof(ret)); 136 strncpy(ret, paxflags, sizeof(ret));
117 // ++shown;
118 } 137 }
119 138
120 if (be_quiet && !shown) 139 if (be_wewy_wewy_quiet || (be_quiet && !shown))
121 return NULL;
122 return ret;
123
124}
125static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
126{
127 static char ret[8] = "--- ---";
128 char *found;
129 unsigned long i, off, shown;
130
131 if (!show_stack) return NULL;
132
133 shown = 0;
134
135 if (elf->phdr) {
136#define SHOW_STACK(B) \
137 if (elf->elf_class == ELFCLASS ## B) { \
138 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
139 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
140 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
141 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
142 found = found_stack; \
143 off = 0; \
144 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
145 found = found_relro; \
146 off = 4; \
147 } else \
148 continue; \
149 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
150 continue; \
151 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
152 *found = 1; \
153 ++shown; \
154 } \
155 }
156 SHOW_STACK(32)
157 SHOW_STACK(64)
158 }
159
160 if (be_quiet && !shown)
161 return NULL; 140 return NULL;
162 else 141 else
163 return ret; 142 return ret;
164} 143}
144
145static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
146{
147 static char ret[12];
148 char *found;
149 unsigned long i, shown;
150 unsigned char multi_stack, multi_relro, multi_load;
151
152 if (!show_phdr) return NULL;
153
154 memcpy(ret, "--- --- ---\0", 12);
155
156 shown = 0;
157 multi_stack = multi_relro = multi_load = 0;
158
159#define SHOW_PHDR(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \
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) { \
165 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
166 for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
167 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
168 if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
169 found = found_phdr; \
170 offset = 0; \
171 check_flags = PF_X; \
172 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
173 if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
174 found = found_relro; \
175 offset = 4; \
176 check_flags = PF_X; \
177 } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
178 if (multi_load++ > 2) warnf("%s: more than 2 PT_LOAD's !?", elf->filename); \
179 found = found_load; \
180 offset = 8; \
181 check_flags = PF_W|PF_X; \
182 } else \
183 continue; \
184 flags = EGET(phdr[i].p_flags); \
185 if (be_quiet && ((flags & check_flags) != check_flags)) \
186 continue; \
187 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
188 *found = 1; \
189 ++shown; \
190 } \
191 } else if (elf->shdr != NULL) { \
192 /* no program headers which means this is prob an object file */ \
193 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
194 Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
195 check_flags = SHF_WRITE|SHF_EXECINSTR; \
196 for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
197 if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
198 offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
199 if (!strcmp((char*)(elf->data + offset), ".note.GNU-stack")) { \
200 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
201 flags = EGET(shdr[i].sh_flags); \
202 if (be_quiet && ((flags & check_flags) != check_flags)) \
203 continue; \
204 ++*found_phdr; \
205 shown = 1; \
206 if (flags & SHF_WRITE) ret[0] = 'W'; \
207 if (flags & SHF_ALLOC) ret[1] = 'A'; \
208 if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
209 if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
210 break; \
211 } \
212 } \
213 if (!multi_stack) { \
214 *found_phdr = 1; \
215 shown = 1; \
216 memcpy(ret, "!WX", 3); \
217 } \
218 } \
219 }
220 SHOW_PHDR(32)
221 SHOW_PHDR(64)
222
223 if (be_wewy_wewy_quiet || (be_quiet && !shown))
224 return NULL;
225 else
226 return ret;
227}
165static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 228static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
166{ 229{
167 static char *ret = "TEXTREL"; 230 static const char *ret = "TEXTREL";
168 unsigned long i; 231 unsigned long i;
169 232
170 if (!show_textrel) return NULL; 233 if (!show_textrel && !show_textrels) return NULL;
171 234
172 if (elf->phdr) { 235 if (elf->phdr) {
173#define SHOW_TEXTREL(B) \ 236#define SHOW_TEXTREL(B) \
174 if (elf->elf_class == ELFCLASS ## B) { \ 237 if (elf->elf_class == ELFCLASS ## B) { \
175 Elf ## B ## _Dyn *dyn; \ 238 Elf ## B ## _Dyn *dyn; \
183 dyn = DYN ## B (elf->data + offset); \ 246 dyn = DYN ## B (elf->data + offset); \
184 while (EGET(dyn->d_tag) != DT_NULL) { \ 247 while (EGET(dyn->d_tag) != DT_NULL) { \
185 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 248 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
186 *found_textrel = 1; \ 249 *found_textrel = 1; \
187 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 250 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
188 return ret; \ 251 return (be_wewy_wewy_quiet ? NULL : ret); \
189 } \ 252 } \
190 ++dyn; \ 253 ++dyn; \
191 } \ 254 } \
192 } } 255 } }
193 SHOW_TEXTREL(32) 256 SHOW_TEXTREL(32)
194 SHOW_TEXTREL(64) 257 SHOW_TEXTREL(64)
195 } 258 }
196 259
197 if (be_quiet) 260 if (be_quiet || be_wewy_wewy_quiet)
198 return NULL; 261 return NULL;
199 else 262 else
200 return " - "; 263 return " - ";
201} 264}
265static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
266{
267 unsigned long s, r, rmax;
268 void *symtab_void, *strtab_void, *text_void;
269
270 if (!show_textrels) return NULL;
271
272 /* don't search for TEXTREL's if the ELF doesn't have any */
273 if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
274 if (!*found_textrel) return NULL;
275
276 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
277 text_void = elf_findsecbyname(elf, ".text");
278
279 if (symtab_void && strtab_void && text_void && elf->shdr) {
280#define SHOW_TEXTRELS(B) \
281 if (elf->elf_class == ELFCLASS ## B) { \
282 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
283 Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
284 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
285 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
286 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
287 Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
288 uint ## B ## _t memsz = EGET(text->sh_size); \
289 Elf ## B ## _Rel *rel; \
290 Elf ## B ## _Rela *rela; \
291 /* search the section headers for relocations */ \
292 for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
293 uint32_t sh_type = EGET(shdr[s].sh_type); \
294 if (sh_type == SHT_REL) { \
295 rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
296 rela = NULL; \
297 rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
298 } else if (sh_type == SHT_RELA) { \
299 rel = NULL; \
300 rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
301 rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
302 } else \
303 continue; \
304 /* now see if any of the relocs are in the .text */ \
305 for (r = 0; r < rmax; ++r) { \
306 unsigned long sym_max; \
307 Elf ## B ## _Addr offset_tmp; \
308 Elf ## B ## _Sym *func; \
309 Elf ## B ## _Sym *sym; \
310 Elf ## B ## _Addr r_offset; \
311 uint ## B ## _t r_info; \
312 if (sh_type == SHT_REL) { \
313 r_offset = EGET(rel[r].r_offset); \
314 r_info = EGET(rel[r].r_info); \
315 } else { \
316 r_offset = EGET(rela[r].r_offset); \
317 r_info = EGET(rela[r].r_info); \
318 } \
319 /* make sure this relocation is inside of the .text */ \
320 if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
321 if (be_verbose <= 2) continue; \
322 } else \
323 *found_textrels = 1; \
324 /* locate this relocation symbol name */ \
325 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
326 sym_max = ELF ## B ## _R_SYM(r_info); \
327 if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
328 sym += sym_max; \
329 else \
330 sym = NULL; \
331 sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
332 /* show the raw details about this reloc */ \
333 printf(" %s: ", elf->base_filename); \
334 if (sym && sym->st_name) \
335 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
336 else \
337 printf("(memory/fake?)"); \
338 printf(" [0x%lX]", (unsigned long)r_offset); \
339 /* now try to find the closest symbol that this rel is probably in */ \
340 sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
341 func = NULL; \
342 offset_tmp = 0; \
343 while (sym_max--) { \
344 if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
345 func = sym; \
346 offset_tmp = EGET(sym->st_value); \
347 } \
348 ++sym; \
349 } \
350 printf(" in "); \
351 if (func && func->st_name) \
352 printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
353 else \
354 printf("(NULL: fake?)"); \
355 printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
356 } \
357 } }
358 SHOW_TEXTRELS(32)
359 SHOW_TEXTRELS(64)
360 }
361 if (!*found_textrels)
362 warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
363
364 return NULL;
365}
366
367static void rpath_security_checks(elfobj *, char *);
368static void rpath_security_checks(elfobj *elf, char *item) {
369 struct stat st;
370 switch (*item) {
371 case '/': break;
372 case '.':
373 warnf("Security problem with relative RPATH '%s' in %s", item, elf->filename);
374 break;
375 case '\0':
376 warnf("Security problem NULL RPATH in %s", elf->filename);
377 break;
378 case '$':
379 if (fstat(elf->fd, &st) != -1)
380 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
381 warnf("Security problem with RPATH='%s' in %s with mode set of %o",
382 item, elf->filename, st.st_mode & 07777);
383 break;
384 default:
385 warnf("Maybe? sec problem with RPATH='%s' in %s", item, elf->filename);
386 break;
387 }
388}
202static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len) 389static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
203{ 390{
204 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
205 unsigned long i, s; 391 unsigned long i, s;
206 char *rpath, *runpath, **r; 392 char *rpath, *runpath, **r;
207 void *strtbl_void; 393 void *strtbl_void;
208 394
209 if (!show_rpath) return; 395 if (!show_rpath) return;
237 ++dyn; \ 423 ++dyn; \
238 continue; \ 424 continue; \
239 } \ 425 } \
240 /* Verify the memory is somewhat sane */ \ 426 /* Verify the memory is somewhat sane */ \
241 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 427 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
242 if (offset < elf->len) { \ 428 if (offset < (Elf ## B ## _Off)elf->len) { \
243 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 429 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
244 *r = (char*)(elf->data + offset); \ 430 *r = (char*)(elf->data + offset); \
245 /* If quiet, don't output paths in ld.so.conf */ \ 431 /* If quiet, don't output paths in ld.so.conf */ \
246 if (be_quiet) \ 432 if (be_quiet) { \
433 size_t len; \
434 char *start, *end; \
435 /* note that we only 'chop' off leading known paths. */ \
436 /* since *r is read-only memory, we can only move the ptr forward. */ \
437 start = *r; \
438 /* scan each path in : delimited list */ \
439 while (start) { \
440 rpath_security_checks(elf, start); \
441 end = strchr(start, ':'); \
442 len = (end ? abs(end - start) : strlen(start)); \
247 for (s = 0; ldpaths[s]; ++s) \ 443 for (s = 0; ldpaths[s]; ++s) { \
248 if (!strcmp(ldpaths[s], *r)) { \ 444 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
249 *r = NULL; \ 445 *r = (end ? end + 1 : NULL); \
250 break; \ 446 break; \
447 } \
251 } \ 448 } \
449 if (!*r || !ldpaths[s] || !end) \
450 start = NULL; \
451 else \
452 start = start + len + 1; \
453 } \
454 } \
252 if (*r) *found_rpath = 1; \ 455 if (*r) *found_rpath = 1; \
253 } \ 456 } \
254 ++dyn; \ 457 ++dyn; \
255 } \ 458 } \
256 } } 459 } }
257 SHOW_RPATH(32) 460 SHOW_RPATH(32)
258 SHOW_RPATH(64) 461 SHOW_RPATH(64)
259 } 462 }
463
464 if (be_wewy_wewy_quiet) return;
260 465
261 if (rpath && runpath) { 466 if (rpath && runpath) {
262 if (!strcmp(rpath, runpath)) { 467 if (!strcmp(rpath, runpath)) {
263 xstrcat(ret, runpath, ret_len); 468 xstrcat(ret, runpath, ret_len);
264 } else { 469 } else {
272 } else if (rpath || runpath) 477 } else if (rpath || runpath)
273 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 478 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
274 else if (!be_quiet) 479 else if (!be_quiet)
275 xstrcat(ret, " - ", ret_len); 480 xstrcat(ret, " - ", ret_len);
276} 481}
277static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len) 482static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
278{ 483{
279 unsigned long i; 484 unsigned long i;
280 char *needed; 485 char *needed;
281 void *strtbl_void; 486 void *strtbl_void;
282 487
283 if (!show_needed) return; 488 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
284 489
285 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 490 strtbl_void = elf_findsecbyname(elf, ".dynstr");
286 491
287 if (elf->phdr && strtbl_void) { 492 if (elf->phdr && strtbl_void) {
288#define SHOW_NEEDED(B) \ 493#define SHOW_NEEDED(B) \
298 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 503 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
299 dyn = DYN ## B (elf->data + offset); \ 504 dyn = DYN ## B (elf->data + offset); \
300 while (EGET(dyn->d_tag) != DT_NULL) { \ 505 while (EGET(dyn->d_tag) != DT_NULL) { \
301 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 506 if (EGET(dyn->d_tag) == DT_NEEDED) { \
302 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 507 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
303 if (offset >= elf->len) { \ 508 if (offset >= (Elf ## B ## _Off)elf->len) { \
304 ++dyn; \ 509 ++dyn; \
305 continue; \ 510 continue; \
306 } \ 511 } \
307 needed = (char*)(elf->data + offset); \ 512 needed = (char*)(elf->data + offset); \
513 if (op == 0) { \
514 if (!be_wewy_wewy_quiet) { \
308 if (*found_needed) xchrcat(ret, ',', ret_len); \ 515 if (*found_needed) xchrcat(ret, ',', ret_len); \
309 xstrcat(ret, needed, ret_len); \ 516 xstrcat(ret, needed, ret_len); \
517 } \
310 *found_needed = 1; \ 518 *found_needed = 1; \
519 } else { \
520 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
521 *found_lib = 1; \
522 return (be_wewy_wewy_quiet ? NULL : needed); \
523 } \
524 } \
311 } \ 525 } \
312 ++dyn; \ 526 ++dyn; \
313 } \ 527 } \
314 } } 528 } }
315 SHOW_NEEDED(32) 529 SHOW_NEEDED(32)
316 SHOW_NEEDED(64) 530 SHOW_NEEDED(64)
531 if (op == 0 && !*found_needed && be_verbose)
532 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
317 } 533 }
534
535 return NULL;
318} 536}
319static char *scanelf_file_interp(elfobj *elf, char *found_interp) 537static char *scanelf_file_interp(elfobj *elf, char *found_interp)
320{ 538{
321 void *strtbl_void; 539 void *strtbl_void;
322 540
327 if (strtbl_void) { 545 if (strtbl_void) {
328#define SHOW_INTERP(B) \ 546#define SHOW_INTERP(B) \
329 if (elf->elf_class == ELFCLASS ## B) { \ 547 if (elf->elf_class == ELFCLASS ## B) { \
330 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 548 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
331 *found_interp = 1; \ 549 *found_interp = 1; \
332 return elf->data + EGET(strtbl->sh_offset); \ 550 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
333 } 551 }
334 SHOW_INTERP(32) 552 SHOW_INTERP(32)
335 SHOW_INTERP(64) 553 SHOW_INTERP(64)
336 } 554 }
337 return NULL; 555 return NULL;
359 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 577 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
360 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \ 578 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
361 { \ 579 { \
362 if (be_quiet) return NULL; \ 580 if (be_quiet) return NULL; \
363 *found_bind = 1; \ 581 *found_bind = 1; \
364 return "NOW"; \ 582 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
365 } \ 583 } \
366 ++dyn; \ 584 ++dyn; \
367 } \ 585 } \
368 } \ 586 } \
369 } 587 }
370 SHOW_BIND(32) 588 SHOW_BIND(32)
371 SHOW_BIND(64) 589 SHOW_BIND(64)
372 590
591 if (be_wewy_wewy_quiet) return NULL;
592
373 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) { 593 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
374 return NULL; 594 return NULL;
375 } else { 595 } else {
376 *found_bind = 1; 596 *found_bind = 1;
377 return "LAZY"; 597 return (char *) "LAZY";
378 } 598 }
379} 599}
600static char *scanelf_file_soname(elfobj *elf, char *found_soname)
601{
602 unsigned long i;
603 char *soname;
604 void *strtbl_void;
605
606 if (!show_soname) return NULL;
607
608 strtbl_void = elf_findsecbyname(elf, ".dynstr");
609
610 if (elf->phdr && strtbl_void) {
611#define SHOW_SONAME(B) \
612 if (elf->elf_class == ELFCLASS ## B) { \
613 Elf ## B ## _Dyn *dyn; \
614 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
615 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
616 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
617 Elf ## B ## _Off offset; \
618 /* only look for soname in shared objects */ \
619 if (ehdr->e_type != ET_DYN) \
620 return NULL; \
621 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
622 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
623 offset = EGET(phdr[i].p_offset); \
624 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
625 dyn = DYN ## B (elf->data + offset); \
626 while (EGET(dyn->d_tag) != DT_NULL) { \
627 if (EGET(dyn->d_tag) == DT_SONAME) { \
628 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
629 if (offset >= (Elf ## B ## _Off)elf->len) { \
630 ++dyn; \
631 continue; \
632 } \
633 soname = (char*)(elf->data + offset); \
634 *found_soname = 1; \
635 return (be_wewy_wewy_quiet ? NULL : soname); \
636 } \
637 ++dyn; \
638 } \
639 } }
640 SHOW_SONAME(32)
641 SHOW_SONAME(64)
642 }
643
644 return NULL;
645}
380static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 646static char *scanelf_file_sym(elfobj *elf, char *found_sym)
381{ 647{
382 unsigned long i; 648 unsigned long i;
383 void *symtab_void, *strtab_void; 649 void *symtab_void, *strtab_void;
384 650
385 if (!find_sym) return NULL; 651 if (!find_sym) return NULL;
386 652
387 symtab_void = elf_findsecbyname(elf, ".symtab"); 653 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
388 strtab_void = elf_findsecbyname(elf, ".strtab");
389 654
390 if (symtab_void && strtab_void) { 655 if (symtab_void && strtab_void) {
391 char *base, *basemem;
392 basemem = xstrdup(filename);
393 base = basename(basemem);
394#define FIND_SYM(B) \ 656#define FIND_SYM(B) \
395 if (elf->elf_class == ELFCLASS ## B) { \ 657 if (elf->elf_class == ELFCLASS ## B) { \
396 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 658 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
397 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 659 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
398 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 660 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
402 if (sym->st_name) { \ 664 if (sym->st_name) { \
403 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 665 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
404 if (*find_sym == '*') { \ 666 if (*find_sym == '*') { \
405 printf("%s(%s) %5lX %15s %s\n", \ 667 printf("%s(%s) %5lX %15s %s\n", \
406 ((*found_sym == 0) ? "\n\t" : "\t"), \ 668 ((*found_sym == 0) ? "\n\t" : "\t"), \
407 base, \ 669 elf->base_filename, \
408 (long)sym->st_size, \ 670 (long)sym->st_size, \
409 (char *)get_elfstttype(sym->st_info), \ 671 (char *)get_elfstttype(sym->st_info), \
410 symname); \ 672 symname); \
411 *found_sym = 1; \ 673 *found_sym = 1; \
412 } else if ((strcmp(find_sym, symname) == 0) || \ 674 } else if ((strcmp(find_sym, symname) == 0) || \
415 } \ 677 } \
416 ++sym; \ 678 ++sym; \
417 } } 679 } }
418 FIND_SYM(32) 680 FIND_SYM(32)
419 FIND_SYM(64) 681 FIND_SYM(64)
420 free(basemem);
421 } 682 }
683
684 if (be_wewy_wewy_quiet) return NULL;
685
422 if (*find_sym != '*' && *found_sym) 686 if (*find_sym != '*' && *found_sym)
423 return find_sym; 687 return find_sym;
424 if (be_quiet) 688 if (be_quiet)
425 return NULL; 689 return NULL;
426 else 690 else
427 return " - "; 691 return (char *)" - ";
428} 692}
429/* scan an elf file and show all the fun stuff */ 693/* scan an elf file and show all the fun stuff */
430// #define prints(str) fputs(str, stdout)
431#define prints(str) write(fileno(stdout), str, strlen(str)) 694#define prints(str) write(fileno(stdout), str, strlen(str))
432static void scanelf_file(const char *filename) 695static void scanelf_file(const char *filename)
433{ 696{
434 unsigned long i; 697 unsigned long i;
435 char found_pax, found_stack, found_relro, found_textrel, 698 char found_pax, found_phdr, found_relro, found_load, found_textrel,
436 found_rpath, found_needed, found_interp, found_bind, 699 found_rpath, found_needed, found_interp, found_bind, found_soname,
437 found_sym, found_file; 700 found_sym, found_lib, found_file, found_textrels;
438 elfobj *elf; 701 elfobj *elf;
439 struct stat st; 702 struct stat st;
440 static char *out_buffer = NULL; 703 static char *out_buffer = NULL;
441 static size_t out_len; 704 static size_t out_len;
442 705
453 if (!S_ISREG(st.st_mode)) { 716 if (!S_ISREG(st.st_mode)) {
454 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 717 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
455 return; 718 return;
456 } 719 }
457 720
458 found_pax = found_stack = found_relro = found_textrel = \ 721 found_pax = found_phdr = found_relro = found_load = found_textrel = \
459 found_rpath = found_needed = found_interp = found_bind = \ 722 found_rpath = found_needed = found_interp = found_bind = found_soname = \
460 found_sym = found_file = 0; 723 found_sym = found_lib = found_file = found_textrels = 0;
461 724
462 /* verify this is real ELF */ 725 /* verify this is real ELF */
463 if ((elf = readelf(filename)) == NULL) { 726 if ((elf = readelf(filename)) == NULL) {
464 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 727 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
465 return; 728 return;
466 } 729 }
467 730
468 if (be_verbose > 1) 731 if (be_verbose > 1)
469 printf("%s: scanning file {%s,%s}\n", filename, 732 printf("%s: scanning file {%s,%s}\n", filename,
470 get_elfeitype(elf, EI_CLASS, elf->elf_class), 733 get_elfeitype(EI_CLASS, elf->elf_class),
471 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 734 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
472 else if (be_verbose) 735 else if (be_verbose)
473 printf("%s: scanning file\n", filename); 736 printf("%s: scanning file\n", filename);
474 737
475 /* init output buffer */ 738 /* init output buffer */
476 if (!out_buffer) { 739 if (!out_buffer) {
480 *out_buffer = '\0'; 743 *out_buffer = '\0';
481 744
482 /* show the header */ 745 /* show the header */
483 if (!be_quiet && show_banner) { 746 if (!be_quiet && show_banner) {
484 for (i = 0; out_format[i]; ++i) { 747 for (i = 0; out_format[i]; ++i) {
485 if (out_format[i] != '%') continue; 748 if (!IS_MODIFIER(out_format[i])) continue;
486 749
487 switch (out_format[++i]) { 750 switch (out_format[++i]) {
488 case '%': break; 751 case '%': break;
752 case '#': break;
753 case 'F':
754 case 'p':
489 case 'F': prints("FILE "); found_file = 1; break; 755 case 'f': prints("FILE "); found_file = 1; break;
490 case 'o': prints(" TYPE "); break; 756 case 'o': prints(" TYPE "); break;
491 case 'x': prints(" PAX "); break; 757 case 'x': prints(" PAX "); break;
492 case 'e': prints("STK/REL "); break; 758 case 'e': prints("STK/REL/PTL "); break;
493 case 't': prints("TEXTREL "); break; 759 case 't': prints("TEXTREL "); break;
494 case 'r': prints("RPATH "); break; 760 case 'r': prints("RPATH "); break;
495 case 'n': prints("NEEDED "); break; 761 case 'n': prints("NEEDED "); break;
496 case 'i': prints("INTERP "); break; 762 case 'i': prints("INTERP "); break;
497 case 'b': prints("BIND "); break; 763 case 'b': prints("BIND "); break;
764 case 'S': prints("SONAME "); break;
498 case 's': prints("SYM "); break; 765 case 's': prints("SYM "); break;
766 case 'N': prints("LIB "); break;
767 case 'T': prints("TEXTRELS "); break;
768 default: warnf("'%c' has no title ?", out_format[i]);
499 } 769 }
500 } 770 }
501 if (!found_file) prints("FILE "); 771 if (!found_file) prints("FILE ");
502 prints("\n"); 772 prints("\n");
503 found_file = 0; 773 found_file = 0;
505 } 775 }
506 776
507 /* dump all the good stuff */ 777 /* dump all the good stuff */
508 for (i = 0; out_format[i]; ++i) { 778 for (i = 0; out_format[i]; ++i) {
509 const char *out; 779 const char *out;
780 const char *tmp;
510 781
511 /* make sure we trim leading spaces in quiet mode */ 782 /* make sure we trim leading spaces in quiet mode */
512 if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) 783 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
513 *out_buffer = '\0'; 784 *out_buffer = '\0';
514 785
515 if (out_format[i] != '%') { 786 if (!IS_MODIFIER(out_format[i])) {
516 xchrcat(&out_buffer, out_format[i], &out_len); 787 xchrcat(&out_buffer, out_format[i], &out_len);
517 continue; 788 continue;
518 } 789 }
519 790
520 out = NULL; 791 out = NULL;
792 be_wewy_wewy_quiet = (out_format[i] == '#');
521 switch (out_format[++i]) { 793 switch (out_format[++i]) {
794 case '%':
795 case '#':
522 case '%': xchrcat(&out_buffer, '%', &out_len); break; 796 xchrcat(&out_buffer, out_format[i], &out_len); break;
523 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break; 797 case 'F':
798 found_file = 1;
799 if (be_wewy_wewy_quiet) break;
800 xstrcat(&out_buffer, filename, &out_len);
801 break;
802 case 'p':
803 found_file = 1;
804 if (be_wewy_wewy_quiet) break;
805 tmp = filename;
806 if (search_path) {
807 ssize_t len_search = strlen(search_path);
808 ssize_t len_file = strlen(filename);
809 if (!strncmp(filename, search_path, len_search) && \
810 len_file > len_search)
811 tmp += len_search;
812 if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
813 }
814 xstrcat(&out_buffer, tmp, &out_len);
815 break;
816 case 'f':
817 found_file = 1;
818 if (be_wewy_wewy_quiet) break;
819 tmp = strrchr(filename, '/');
820 tmp = (tmp == NULL ? filename : tmp+1);
821 xstrcat(&out_buffer, tmp, &out_len);
822 break;
524 case 'o': out = get_elfetype(elf); break; 823 case 'o': out = get_elfetype(elf); break;
525 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 824 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
526 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break; 825 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
527 case 't': out = scanelf_file_textrel(elf, &found_textrel); break; 826 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
827 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
528 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break; 828 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
829 case 'n':
529 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break; 830 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
530 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 831 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
531 case 'b': out = scanelf_file_bind(elf, &found_bind); break; 832 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
833 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
532 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break; 834 case 's': out = scanelf_file_sym(elf, &found_sym); break;
835 default: warnf("'%c' has no scan code?", out_format[i]);
533 } 836 }
534 if (out) xstrcat(&out_buffer, out, &out_len); 837 if (out) xstrcat(&out_buffer, out, &out_len);
535 } 838 }
536 839
537#define FOUND_SOMETHING() \ 840#define FOUND_SOMETHING() \
538 (found_pax || found_stack || found_textrel || found_rpath || \ 841 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
539 found_needed || found_interp || found_bind || found_sym) 842 found_rpath || found_needed || found_interp || found_bind || \
843 found_soname || found_sym || found_lib || found_textrels)
540 844
541 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 845 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
542 xchrcat(&out_buffer, ' ', &out_len); 846 xchrcat(&out_buffer, ' ', &out_len);
543 xstrcat(&out_buffer, filename, &out_len); 847 xstrcat(&out_buffer, filename, &out_len);
544 } 848 }
545 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 849 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
546 puts(out_buffer); 850 puts(out_buffer);
851 fflush(stdout);
852 }
547 853
548 unreadelf(elf); 854 unreadelf(elf);
549} 855}
550 856
551/* scan a directory for ET_EXEC files and print when we find one */ 857/* scan a directory for ET_EXEC files and print when we find one */
580 while ((dentry = readdir(dir))) { 886 while ((dentry = readdir(dir))) {
581 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 887 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
582 continue; 888 continue;
583 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 889 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
584 if (len >= sizeof(buf)) { 890 if (len >= sizeof(buf)) {
585 warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf)); 891 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
892 (unsigned long)len, (unsigned long)sizeof(buf));
586 continue; 893 continue;
587 } 894 }
588 sprintf(buf, "%s/%s", path, dentry->d_name); 895 sprintf(buf, "%s/%s", path, dentry->d_name);
589 if (lstat(buf, &st) != -1) { 896 if (lstat(buf, &st) != -1) {
590 if (S_ISREG(st.st_mode)) 897 if (S_ISREG(st.st_mode))
610 return 1; 917 return 1;
611 918
612 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 919 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
613 if ((p = strchr(path, '\n')) != NULL) 920 if ((p = strchr(path, '\n')) != NULL)
614 *p = 0; 921 *p = 0;
922 search_path = path;
615 scanelf_dir(path); 923 scanelf_dir(path);
616 } 924 }
617 if (fp != stdin) 925 if (fp != stdin)
618 fclose(fp); 926 fclose(fp);
619 return 0; 927 return 0;
691} 999}
692 1000
693 1001
694 1002
695/* usage / invocation handling functions */ 1003/* usage / invocation handling functions */
696#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" 1004#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV"
697#define a_argument required_argument 1005#define a_argument required_argument
698static struct option const long_opts[] = { 1006static struct option const long_opts[] = {
699 {"path", no_argument, NULL, 'p'}, 1007 {"path", no_argument, NULL, 'p'},
700 {"ldpath", no_argument, NULL, 'l'}, 1008 {"ldpath", no_argument, NULL, 'l'},
701 {"recursive", no_argument, NULL, 'R'}, 1009 {"recursive", no_argument, NULL, 'R'},
706 {"textrel", no_argument, NULL, 't'}, 1014 {"textrel", no_argument, NULL, 't'},
707 {"rpath", no_argument, NULL, 'r'}, 1015 {"rpath", no_argument, NULL, 'r'},
708 {"needed", no_argument, NULL, 'n'}, 1016 {"needed", no_argument, NULL, 'n'},
709 {"interp", no_argument, NULL, 'i'}, 1017 {"interp", no_argument, NULL, 'i'},
710 {"bind", no_argument, NULL, 'b'}, 1018 {"bind", no_argument, NULL, 'b'},
1019 {"soname", no_argument, NULL, 'S'},
711 {"symbol", a_argument, NULL, 's'}, 1020 {"symbol", a_argument, NULL, 's'},
1021 {"lib", a_argument, NULL, 'N'},
1022 {"gmatch", no_argument, NULL, 'g'},
1023 {"textrels", no_argument, NULL, 'T'},
712 {"all", no_argument, NULL, 'a'}, 1024 {"all", no_argument, NULL, 'a'},
713 {"quiet", no_argument, NULL, 'q'}, 1025 {"quiet", no_argument, NULL, 'q'},
714 {"verbose", no_argument, NULL, 'v'}, 1026 {"verbose", no_argument, NULL, 'v'},
715 {"format", a_argument, NULL, 'F'}, 1027 {"format", a_argument, NULL, 'F'},
716 {"from", a_argument, NULL, 'f'}, 1028 {"from", a_argument, NULL, 'f'},
717 {"file", a_argument, NULL, 'o'}, 1029 {"file", a_argument, NULL, 'o'},
718 {"nobanner", no_argument, NULL, 'B'}, 1030 {"nobanner", no_argument, NULL, 'B'},
719 {"help", no_argument, NULL, 'h'}, 1031 {"help", no_argument, NULL, 'h'},
720 {"version", no_argument, NULL, 'V'}, 1032 {"version", no_argument, NULL, 'V'},
721 {NULL, no_argument, NULL, 0x0} 1033 {NULL, no_argument, NULL, 0x0}
722}; 1034};
723 1035
724static char *opts_help[] = { 1036static const char *opts_help[] = {
725 "Scan all directories in PATH environment", 1037 "Scan all directories in PATH environment",
726 "Scan all directories in /etc/ld.so.conf", 1038 "Scan all directories in /etc/ld.so.conf",
727 "Scan directories recursively", 1039 "Scan directories recursively",
728 "Don't recursively cross mount points", 1040 "Don't recursively cross mount points",
729 "Don't scan symlinks\n", 1041 "Don't scan symlinks\n",
730 "Print PaX markings", 1042 "Print PaX markings",
731 "Print GNU_STACK markings", 1043 "Print GNU_STACK/PT_LOAD markings",
732 "Print TEXTREL information", 1044 "Print TEXTREL information",
733 "Print RPATH information", 1045 "Print RPATH information",
734 "Print NEEDED information", 1046 "Print NEEDED information",
735 "Print INTERP information", 1047 "Print INTERP information",
736 "Print BIND information", 1048 "Print BIND information",
1049 "Print SONAME information",
737 "Find a specified symbol", 1050 "Find a specified symbol",
1051 "Find a specified library",
1052 "Use strncmp to match libraries. (use with -N)",
1053 "Locate cause of TEXTREL",
738 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1054 "Print all scanned info (-x -e -t -r -b)\n",
739 "Only output 'bad' things", 1055 "Only output 'bad' things",
740 "Be verbose (can be specified more than once)", 1056 "Be verbose (can be specified more than once)",
741 "Use specified format for output", 1057 "Use specified format for output",
742 "Read input stream from a filename", 1058 "Read input stream from a filename",
743 "Write output stream to a filename", 1059 "Write output stream to a filename",
764 1080
765 if (status != EXIT_SUCCESS) 1081 if (status != EXIT_SUCCESS)
766 exit(status); 1082 exit(status);
767 1083
768 puts("\nThe format modifiers for the -F option are:"); 1084 puts("\nThe format modifiers for the -F option are:");
769 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO"); 1085 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
770 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED"); 1086 puts(" t TEXTREL \tr RPATH \tn NEEDED");
771 puts(" %i INTERP \t%b BIND \t%s symbol"); 1087 puts(" i INTERP \tb BIND \ts symbol");
1088 puts(" N library \to Type \tT TEXTRELs");
1089 puts(" S SONAME");
1090 puts(" p filename (with search path removed)");
1091 puts(" f filename (short name/basename)");
1092 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
772 1093
773 exit(status); 1094 exit(status);
774} 1095}
775 1096
776/* parse command line arguments and preform needed actions */ 1097/* parse command line arguments and preform needed actions */
782 opterr = 0; 1103 opterr = 0;
783 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1104 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
784 switch (i) { 1105 switch (i) {
785 1106
786 case 'V': 1107 case 'V':
787 printf("%s compiled %s\n%s\n" 1108 printf("pax-utils-%s: %s compiled %s\n%s\n"
788 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1109 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
789 __FILE__, __DATE__, rcsid, argv0); 1110 VERSION, __FILE__, __DATE__, rcsid, argv0);
790 exit(EXIT_SUCCESS); 1111 exit(EXIT_SUCCESS);
791 break; 1112 break;
792 case 'h': usage(EXIT_SUCCESS); break; 1113 case 'h': usage(EXIT_SUCCESS); break;
793 case 'f': 1114 case 'f':
794 if (from_file == NULL) 1115 if (from_file) err("Don't specify -f twice");
795 from_file = xstrdup(optarg); 1116 from_file = xstrdup(optarg);
796 else
797 err("Don't specify -f twice");
798 break; 1117 break;
799 case 'o': { 1118 case 'o': {
800 FILE *fp = NULL; 1119 FILE *fp = NULL;
801 fp = freopen(optarg, "w", stdout); 1120 if ((fp = freopen(optarg, "w", stdout)) == NULL)
802 if (fp == NULL)
803 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1121 err("Could not open output stream '%s': %s", optarg, strerror(errno));
804 stdout = fp; 1122 SET_STDOUT(fp);
805 break; 1123 break;
806 } 1124 }
807 1125
808 case 's': { 1126 case 's': {
809 size_t len; 1127 size_t len;
810 if (!find_sym)
811 err("Don't specify -s twice"); 1128 if (find_sym) err("Don't specify -s twice");
812 find_sym = xstrdup(optarg); 1129 find_sym = xstrdup(optarg);
813 len = strlen(find_sym) + 1; 1130 len = strlen(find_sym) + 1;
814 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1131 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
815 sprintf(versioned_symname, "%s@", find_sym); 1132 sprintf(versioned_symname, "%s@", find_sym);
816 break; 1133 break;
817 } 1134 }
818
819 case 'F': { 1135 case 'N': {
820 if (!out_format)
821 out_format = xstrdup(optarg);
822 else
823 err("Don't specify -F twice"); 1136 if (find_lib) err("Don't specify -N twice");
1137 find_lib = xstrdup(optarg);
824 break; 1138 break;
825 } 1139 }
826 1140
1141 case 'F': {
1142 if (out_format) err("Don't specify -F twice");
1143 out_format = xstrdup(optarg);
1144 break;
1145 }
1146
1147 case 'g': gmatch = 1;
827 case 'y': scan_symlink = 0; break; 1148 case 'y': scan_symlink = 0; break;
828 case 'B': show_banner = 0; break; 1149 case 'B': show_banner = 0; break;
829 case 'l': scan_ldpath = 1; break; 1150 case 'l': scan_ldpath = 1; break;
830 case 'p': scan_envpath = 1; break; 1151 case 'p': scan_envpath = 1; break;
831 case 'R': dir_recurse = 1; break; 1152 case 'R': dir_recurse = 1; break;
832 case 'm': dir_crossmount = 0; break; 1153 case 'm': dir_crossmount = 0; break;
833 case 'x': show_pax = 1; break; 1154 case 'x': show_pax = 1; break;
834 case 'e': show_stack = 1; break; 1155 case 'e': show_phdr = 1; break;
835 case 't': show_textrel = 1; break; 1156 case 't': show_textrel = 1; break;
836 case 'r': show_rpath = 1; break; 1157 case 'r': show_rpath = 1; break;
837 case 'n': show_needed = 1; break; 1158 case 'n': show_needed = 1; break;
838 case 'i': show_interp = 1; break; 1159 case 'i': show_interp = 1; break;
839 case 'b': show_bind = 1; break; 1160 case 'b': show_bind = 1; break;
1161 case 'S': show_soname = 1; break;
1162 case 'T': show_textrels = 1; break;
840 case 'q': be_quiet = 1; break; 1163 case 'q': be_quiet = 1; break;
841 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1164 case 'v': be_verbose = (be_verbose % 20) + 1; break;
842 case 'a': show_pax = show_stack = show_textrel = show_rpath = \ 1165 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
843 show_needed = show_interp = show_bind = 1; break;
844 1166
845 case ':': 1167 case ':':
846 err("Option missing parameter\n"); 1168 err("Option missing parameter\n");
847 case '?': 1169 case '?':
848 err("Unknown option\n"); 1170 err("Unknown option\n");
851 } 1173 }
852 } 1174 }
853 1175
854 /* let the format option override all other options */ 1176 /* let the format option override all other options */
855 if (out_format) { 1177 if (out_format) {
856 show_pax = show_stack = show_textrel = show_rpath = \ 1178 show_pax = show_phdr = show_textrel = show_rpath = \
857 show_needed = show_interp = show_bind = 0; 1179 show_needed = show_interp = show_bind = show_soname = \
1180 show_textrels = 0;
858 for (i = 0; out_format[i]; ++i) { 1181 for (i = 0; out_format[i]; ++i) {
859 if (out_format[i] != '%') continue; 1182 if (!IS_MODIFIER(out_format[i])) continue;
860 1183
861 switch (out_format[++i]) { 1184 switch (out_format[++i]) {
862 case '%': break; 1185 case '%': break;
1186 case '#': break;
863 case 'F': break; 1187 case 'F': break;
1188 case 'p': break;
1189 case 'f': break;
864 case 's': break; 1190 case 's': break;
1191 case 'N': break;
865 case 'o': break; 1192 case 'o': break;
866 case 'x': show_pax = 1; break; 1193 case 'x': show_pax = 1; break;
867 case 'e': show_stack = 1; break; 1194 case 'e': show_phdr = 1; break;
868 case 't': show_textrel = 1; break; 1195 case 't': show_textrel = 1; break;
869 case 'r': show_rpath = 1; break; 1196 case 'r': show_rpath = 1; break;
870 case 'n': show_needed = 1; break; 1197 case 'n': show_needed = 1; break;
871 case 'i': show_interp = 1; break; 1198 case 'i': show_interp = 1; break;
872 case 'b': show_bind = 1; break; 1199 case 'b': show_bind = 1; break;
1200 case 'S': show_soname = 1; break;
1201 case 'T': show_textrels = 1; break;
873 default: 1202 default:
874 err("Invalid format specifier '%c' (byte %i)", 1203 err("Invalid format specifier '%c' (byte %i)",
875 out_format[i], i+1); 1204 out_format[i], i+1);
876 } 1205 }
877 } 1206 }
878 1207
879 /* construct our default format */ 1208 /* construct our default format */
880 } else { 1209 } else {
881 size_t fmt_len = 30; 1210 size_t fmt_len = 30;
882 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1211 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
883 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1212 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
884 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1213 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
885 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); 1214 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
886 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1215 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
887 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1216 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
888 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1217 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
889 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1218 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
890 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len); 1219 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1220 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1221 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
891 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len); 1222 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1223 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
892 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1224 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
893 } 1225 }
894 if (be_verbose > 2) printf("Format: %s\n", out_format); 1226 if (be_verbose > 2) printf("Format: %s\n", out_format);
895 1227
896 /* now lets actually do the scanning */ 1228 /* now lets actually do the scanning */
897 if (scan_ldpath || (show_rpath && be_quiet)) 1229 if (scan_ldpath || (show_rpath && be_quiet))
903 free(from_file); 1235 free(from_file);
904 from_file = *argv; 1236 from_file = *argv;
905 } 1237 }
906 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1238 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
907 err("Nothing to scan !?"); 1239 err("Nothing to scan !?");
908 while (optind < argc) 1240 while (optind < argc) {
909 scanelf_dir(argv[optind++]); 1241 search_path = argv[optind++];
1242 scanelf_dir(search_path);
1243 }
910 1244
911 /* clean up */ 1245 /* clean up */
912 if (find_sym) { 1246 if (find_sym) {
913 free(find_sym); 1247 free(find_sym);
914 free(versioned_symname); 1248 free(versioned_symname);
915 } 1249 }
1250 if (find_lib) free(find_lib);
916 if (out_format) free(out_format); 1251 if (out_format) free(out_format);
917 for (i = 0; ldpaths[i]; ++i) 1252 for (i = 0; ldpaths[i]; ++i)
918 free(ldpaths[i]); 1253 free(ldpaths[i]);
919} 1254}
920 1255
935 return ret; 1270 return ret;
936} 1271}
937 1272
938static void xstrcat(char **dst, const char *src, size_t *curr_len) 1273static void xstrcat(char **dst, const char *src, size_t *curr_len)
939{ 1274{
940 long new_len; 1275 size_t new_len;
941 1276
942 new_len = strlen(*dst) + strlen(src); 1277 new_len = strlen(*dst) + strlen(src);
943 if (*curr_len <= new_len) { 1278 if (*curr_len <= new_len) {
944 *curr_len = new_len + (*curr_len / 2); 1279 *curr_len = new_len + (*curr_len / 2);
945 *dst = realloc(*dst, *curr_len); 1280 *dst = realloc(*dst, *curr_len);
957 my_app[1] = '\0'; 1292 my_app[1] = '\0';
958 xstrcat(dst, my_app, curr_len); 1293 xstrcat(dst, my_app, curr_len);
959} 1294}
960 1295
961 1296
1297
962int main(int argc, char *argv[]) 1298int main(int argc, char *argv[])
963{ 1299{
964 if (argc < 2) 1300 if (argc < 2)
965 usage(EXIT_FAILURE); 1301 usage(EXIT_FAILURE);
966 parseargs(argc, argv); 1302 parseargs(argc, argv);
967 fclose(stdout); 1303 fclose(stdout);
968#ifdef __BOUNDS_CHECKING_ON 1304#ifdef __BOUNDS_CHECKING_ON
969 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()"); 1305 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()");
970#endif 1306#endif
971 return EXIT_SUCCESS; 1307 return EXIT_SUCCESS;
972} 1308}

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