/[gentoo-projects]/pax-utils/scanelf.c
Gentoo

Diff of /pax-utils/scanelf.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.60 Revision 1.91
1/* 1/*
2 * Copyright 2003 Ned Ludd <solar@gentoo.org>
3 * Copyright 1999-2005 Gentoo Foundation 2 * Copyright 2003-2005 Gentoo Foundation
4 * Distributed under the terms of the GNU General Public License v2 3 * Distributed under the terms of the GNU General Public License v2
5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.60 2005/05/27 02:58:39 vapier Exp $ 4 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.91 2005/12/07 01:04:52 vapier Exp $
6 * 5 *
7 ******************************************************************** 6 * Copyright 2003-2005 Ned Ludd - <solar@gentoo.org>
8 * This program is free software; you can redistribute it and/or 7 * Copyright 2004-2005 Mike Frysinger - <vapier@gentoo.org>
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 * MA 02111-1307, USA.
22 */ 8 */
23 9
24#include <stdio.h> 10#include <stdio.h>
25#include <stdlib.h> 11#include <stdlib.h>
26#include <sys/types.h> 12#include <sys/types.h>
32#include <unistd.h> 18#include <unistd.h>
33#include <sys/stat.h> 19#include <sys/stat.h>
34#include <dirent.h> 20#include <dirent.h>
35#include <getopt.h> 21#include <getopt.h>
36#include <assert.h> 22#include <assert.h>
37
38#include "paxelf.h" 23#include "paxinc.h"
39 24
40static const char *rcsid = "$Id: scanelf.c,v 1.60 2005/05/27 02:58:39 vapier Exp $"; 25static const char *rcsid = "$Id: scanelf.c,v 1.91 2005/12/07 01:04:52 vapier Exp $";
41#define argv0 "scanelf" 26#define argv0 "scanelf"
27
28#define IS_MODIFIER(c) (c == '%' || c == '#')
42 29
43 30
44 31
45/* prototypes */ 32/* prototypes */
46static void scanelf_file(const char *filename); 33static void scanelf_file(const char *filename);
60static char scan_envpath = 0; 47static char scan_envpath = 0;
61static char scan_symlink = 1; 48static char scan_symlink = 1;
62static char dir_recurse = 0; 49static char dir_recurse = 0;
63static char dir_crossmount = 1; 50static char dir_crossmount = 1;
64static char show_pax = 0; 51static char show_pax = 0;
65static char show_stack = 0; 52static char show_phdr = 0;
66static char show_textrel = 0; 53static char show_textrel = 0;
67static char show_rpath = 0; 54static char show_rpath = 0;
68static char show_needed = 0; 55static char show_needed = 0;
69static char show_interp = 0; 56static char show_interp = 0;
70static char show_bind = 0; 57static char show_bind = 0;
58static char show_soname = 0;
59static char show_textrels = 0;
71static char show_banner = 1; 60static char show_banner = 1;
72static char be_quiet = 0; 61static char be_quiet = 0;
73static char be_verbose = 0; 62static char be_verbose = 0;
63static char be_wewy_wewy_quiet = 0;
74static char *find_sym = NULL, *versioned_symname = NULL; 64static char *find_sym = NULL, *versioned_symname = NULL;
65static char *find_lib = NULL;
75static char *out_format = NULL; 66static char *out_format = NULL;
76 67static char *search_path = NULL;
68static char gmatch = 0;
77 69
78 70
79/* 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}
80static char *scanelf_file_pax(elfobj *elf, char *found_pax) 98static char *scanelf_file_pax(elfobj *elf, char *found_pax)
81{ 99{
82 static char *paxflags; 100 static char ret[7];
101 unsigned long i, shown;
83 102
84 if (!show_pax) return NULL; 103 if (!show_pax) return NULL;
85 104
86 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
87 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
88 *found_pax = 1;
89 return paxflags;
90 }
91
92 return NULL;
93}
94static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
95{
96 static char ret[8] = "--- ---";
97 char *found;
98 unsigned long i, off, shown;
99
100 if (!show_stack) return NULL;
101
102 shown = 0; 105 shown = 0;
106 memset(&ret, 0, sizeof(ret));
103 107
104 if (elf->phdr) { 108 if (elf->phdr) {
105#define SHOW_STACK(B) \ 109#define SHOW_PAX(B) \
106 if (elf->elf_class == ELFCLASS ## B) { \ 110 if (elf->elf_class == ELFCLASS ## B) { \
107 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 111 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
108 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 112 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
109 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 113 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
110 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 114 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
111 found = found_stack; \
112 off = 0; \
113 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
114 found = found_relro; \
115 off = 4; \
116 } else \
117 continue; \ 115 continue; \
118 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 116 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \
119 continue; \ 117 continue; \
120 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \ 118 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
121 *found = 1; \ 119 *found_pax = 1; \
122 ++shown; \ 120 ++shown; \
121 break; \
123 } \ 122 } \
124 } 123 }
125 SHOW_STACK(32) 124 SHOW_PAX(32)
126 SHOW_STACK(64) 125 SHOW_PAX(64)
126 }
127
128 /* fall back to EI_PAX if no PT_PAX was found */
129 if (!*ret) {
130 static char *paxflags;
131 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
132 if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
133 *found_pax = 1;
134 return (be_wewy_wewy_quiet ? NULL : paxflags);
127 } 135 }
136 strncpy(ret, paxflags, sizeof(ret));
137 }
128 138
129 if (be_quiet && !shown) 139 if (be_wewy_wewy_quiet || (be_quiet && !shown))
130 return NULL; 140 return NULL;
131 else 141 else
132 return ret; 142 return ret;
133} 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}
134static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 228static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
135{ 229{
136 static char *ret = "TEXTREL"; 230 static const char *ret = "TEXTREL";
137 unsigned long i; 231 unsigned long i;
138 232
139 if (!show_textrel) return NULL; 233 if (!show_textrel && !show_textrels) return NULL;
140 234
141 if (elf->phdr) { 235 if (elf->phdr) {
142#define SHOW_TEXTREL(B) \ 236#define SHOW_TEXTREL(B) \
143 if (elf->elf_class == ELFCLASS ## B) { \ 237 if (elf->elf_class == ELFCLASS ## B) { \
144 Elf ## B ## _Dyn *dyn; \ 238 Elf ## B ## _Dyn *dyn; \
152 dyn = DYN ## B (elf->data + offset); \ 246 dyn = DYN ## B (elf->data + offset); \
153 while (EGET(dyn->d_tag) != DT_NULL) { \ 247 while (EGET(dyn->d_tag) != DT_NULL) { \
154 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)*/ \
155 *found_textrel = 1; \ 249 *found_textrel = 1; \
156 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 250 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
157 return ret; \ 251 return (be_wewy_wewy_quiet ? NULL : ret); \
158 } \ 252 } \
159 ++dyn; \ 253 ++dyn; \
160 } \ 254 } \
161 } } 255 } }
162 SHOW_TEXTREL(32) 256 SHOW_TEXTREL(32)
163 SHOW_TEXTREL(64) 257 SHOW_TEXTREL(64)
164 } 258 }
165 259
166 if (be_quiet) 260 if (be_quiet || be_wewy_wewy_quiet)
167 return NULL; 261 return NULL;
168 else 262 else
169 return " - "; 263 return " - ";
170} 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}
171static 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)
172{ 390{
173 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
174 unsigned long i, s; 391 unsigned long i, s;
175 char *rpath, *runpath, **r; 392 char *rpath, *runpath, **r;
176 void *strtbl_void; 393 void *strtbl_void;
177 394
178 if (!show_rpath) return; 395 if (!show_rpath) return;
206 ++dyn; \ 423 ++dyn; \
207 continue; \ 424 continue; \
208 } \ 425 } \
209 /* Verify the memory is somewhat sane */ \ 426 /* Verify the memory is somewhat sane */ \
210 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 427 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
211 if (offset < elf->len) { \ 428 if (offset < (Elf ## B ## _Off)elf->len) { \
212 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 429 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
213 *r = (char*)(elf->data + offset); \ 430 *r = (char*)(elf->data + offset); \
214 /* If quiet, don't output paths in ld.so.conf */ \ 431 /* If quiet, don't output paths in ld.so.conf */ \
215 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)); \
216 for (s = 0; ldpaths[s]; ++s) \ 443 for (s = 0; ldpaths[s]; ++s) { \
217 if (!strcmp(ldpaths[s], *r)) { \ 444 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
218 *r = NULL; \ 445 *r = (end ? end + 1 : NULL); \
219 break; \ 446 break; \
447 } \
220 } \ 448 } \
449 if (!*r || !ldpaths[s] || !end) \
450 start = NULL; \
451 else \
452 start = start + len + 1; \
453 } \
454 } \
221 if (*r) *found_rpath = 1; \ 455 if (*r) *found_rpath = 1; \
222 } \ 456 } \
223 ++dyn; \ 457 ++dyn; \
224 } \ 458 } \
225 } } 459 } }
226 SHOW_RPATH(32) 460 SHOW_RPATH(32)
227 SHOW_RPATH(64) 461 SHOW_RPATH(64)
228 } 462 }
463
464 if (be_wewy_wewy_quiet) return;
229 465
230 if (rpath && runpath) { 466 if (rpath && runpath) {
231 if (!strcmp(rpath, runpath)) { 467 if (!strcmp(rpath, runpath)) {
232 xstrcat(ret, runpath, ret_len); 468 xstrcat(ret, runpath, ret_len);
233 } else { 469 } else {
241 } else if (rpath || runpath) 477 } else if (rpath || runpath)
242 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 478 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
243 else if (!be_quiet) 479 else if (!be_quiet)
244 xstrcat(ret, " - ", ret_len); 480 xstrcat(ret, " - ", ret_len);
245} 481}
246static 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)
247{ 483{
248 unsigned long i; 484 unsigned long i;
249 char *needed; 485 char *needed;
250 void *strtbl_void; 486 void *strtbl_void;
251 487
252 if (!show_needed) return; 488 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
253 489
254 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 490 strtbl_void = elf_findsecbyname(elf, ".dynstr");
255 491
256 if (elf->phdr && strtbl_void) { 492 if (elf->phdr && strtbl_void) {
257#define SHOW_NEEDED(B) \ 493#define SHOW_NEEDED(B) \
267 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 503 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
268 dyn = DYN ## B (elf->data + offset); \ 504 dyn = DYN ## B (elf->data + offset); \
269 while (EGET(dyn->d_tag) != DT_NULL) { \ 505 while (EGET(dyn->d_tag) != DT_NULL) { \
270 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 506 if (EGET(dyn->d_tag) == DT_NEEDED) { \
271 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 507 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
272 if (offset >= elf->len) { \ 508 if (offset >= (Elf ## B ## _Off)elf->len) { \
273 ++dyn; \ 509 ++dyn; \
274 continue; \ 510 continue; \
275 } \ 511 } \
276 needed = (char*)(elf->data + offset); \ 512 needed = (char*)(elf->data + offset); \
513 if (op == 0) { \
514 if (!be_wewy_wewy_quiet) { \
277 if (*found_needed) xchrcat(ret, ',', ret_len); \ 515 if (*found_needed) xchrcat(ret, ',', ret_len); \
278 xstrcat(ret, needed, ret_len); \ 516 xstrcat(ret, needed, ret_len); \
517 } \
279 *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 } \
280 } \ 525 } \
281 ++dyn; \ 526 ++dyn; \
282 } \ 527 } \
283 } } 528 } }
284 SHOW_NEEDED(32) 529 SHOW_NEEDED(32)
285 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);
286 } 533 }
534
535 return NULL;
287} 536}
288static char *scanelf_file_interp(elfobj *elf, char *found_interp) 537static char *scanelf_file_interp(elfobj *elf, char *found_interp)
289{ 538{
290 void *strtbl_void; 539 void *strtbl_void;
291 540
296 if (strtbl_void) { 545 if (strtbl_void) {
297#define SHOW_INTERP(B) \ 546#define SHOW_INTERP(B) \
298 if (elf->elf_class == ELFCLASS ## B) { \ 547 if (elf->elf_class == ELFCLASS ## B) { \
299 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 548 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
300 *found_interp = 1; \ 549 *found_interp = 1; \
301 return elf->data + EGET(strtbl->sh_offset); \ 550 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
302 } 551 }
303 SHOW_INTERP(32) 552 SHOW_INTERP(32)
304 SHOW_INTERP(64) 553 SHOW_INTERP(64)
305 } 554 }
306 return NULL; 555 return NULL;
328 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 577 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
329 (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)) \
330 { \ 579 { \
331 if (be_quiet) return NULL; \ 580 if (be_quiet) return NULL; \
332 *found_bind = 1; \ 581 *found_bind = 1; \
333 return "NOW"; \ 582 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
334 } \ 583 } \
335 ++dyn; \ 584 ++dyn; \
336 } \ 585 } \
337 } \ 586 } \
338 } 587 }
339 SHOW_BIND(32) 588 SHOW_BIND(32)
340 SHOW_BIND(64) 589 SHOW_BIND(64)
341 590
591 if (be_wewy_wewy_quiet) return NULL;
592
342 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)) {
343 return NULL; 594 return NULL;
344 } else { 595 } else {
345 *found_bind = 1; 596 *found_bind = 1;
346 return "LAZY"; 597 return (char *) "LAZY";
347 } 598 }
348} 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}
349static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 646static char *scanelf_file_sym(elfobj *elf, char *found_sym)
350{ 647{
351 unsigned long i; 648 unsigned long i;
352 void *symtab_void, *strtab_void; 649 void *symtab_void, *strtab_void;
353 650
354 if (!find_sym) return NULL; 651 if (!find_sym) return NULL;
355 652
356 symtab_void = elf_findsecbyname(elf, ".symtab"); 653 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
357 strtab_void = elf_findsecbyname(elf, ".strtab");
358 654
359 if (symtab_void && strtab_void) { 655 if (symtab_void && strtab_void) {
360 char *base, *basemem;
361 basemem = xstrdup(filename);
362 base = basename(basemem);
363#define FIND_SYM(B) \ 656#define FIND_SYM(B) \
364 if (elf->elf_class == ELFCLASS ## B) { \ 657 if (elf->elf_class == ELFCLASS ## B) { \
365 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 658 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
366 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 659 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
367 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)); \
371 if (sym->st_name) { \ 664 if (sym->st_name) { \
372 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)); \
373 if (*find_sym == '*') { \ 666 if (*find_sym == '*') { \
374 printf("%s(%s) %5lX %15s %s\n", \ 667 printf("%s(%s) %5lX %15s %s\n", \
375 ((*found_sym == 0) ? "\n\t" : "\t"), \ 668 ((*found_sym == 0) ? "\n\t" : "\t"), \
376 base, \ 669 elf->base_filename, \
377 (long)sym->st_size, \ 670 (long)sym->st_size, \
378 (char *)get_elfstttype(sym->st_info), \ 671 (char *)get_elfstttype(sym->st_info), \
379 symname); \ 672 symname); \
380 *found_sym = 1; \ 673 *found_sym = 1; \
381 } else if ((strcmp(find_sym, symname) == 0) || \ 674 } else if ((strcmp(find_sym, symname) == 0) || \
384 } \ 677 } \
385 ++sym; \ 678 ++sym; \
386 } } 679 } }
387 FIND_SYM(32) 680 FIND_SYM(32)
388 FIND_SYM(64) 681 FIND_SYM(64)
389 free(basemem);
390 } 682 }
683
684 if (be_wewy_wewy_quiet) return NULL;
685
391 if (*find_sym != '*' && *found_sym) 686 if (*find_sym != '*' && *found_sym)
392 return find_sym; 687 return find_sym;
393 if (be_quiet) 688 if (be_quiet)
394 return NULL; 689 return NULL;
395 else 690 else
396 return " - "; 691 return (char *)" - ";
397} 692}
398/* scan an elf file and show all the fun stuff */ 693/* scan an elf file and show all the fun stuff */
399// #define prints(str) fputs(str, stdout)
400#define prints(str) write(fileno(stdout), str, strlen(str)) 694#define prints(str) write(fileno(stdout), str, strlen(str))
401static void scanelf_file(const char *filename) 695static void scanelf_file(const char *filename)
402{ 696{
403 unsigned long i; 697 unsigned long i;
404 char found_pax, found_stack, found_relro, found_textrel, 698 char found_pax, found_phdr, found_relro, found_load, found_textrel,
405 found_rpath, found_needed, found_interp, found_bind, 699 found_rpath, found_needed, found_interp, found_bind, found_soname,
406 found_sym, found_file; 700 found_sym, found_lib, found_file, found_textrels;
407 elfobj *elf; 701 elfobj *elf;
408 struct stat st; 702 struct stat st;
409 static char *out_buffer = NULL; 703 static char *out_buffer = NULL;
410 static size_t out_len; 704 static size_t out_len;
411 705
422 if (!S_ISREG(st.st_mode)) { 716 if (!S_ISREG(st.st_mode)) {
423 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 717 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
424 return; 718 return;
425 } 719 }
426 720
427 found_pax = found_stack = found_relro = found_textrel = \ 721 found_pax = found_phdr = found_relro = found_load = found_textrel = \
428 found_rpath = found_needed = found_interp = found_bind = \ 722 found_rpath = found_needed = found_interp = found_bind = found_soname = \
429 found_sym = found_file = 0; 723 found_sym = found_lib = found_file = found_textrels = 0;
430 724
431 /* verify this is real ELF */ 725 /* verify this is real ELF */
432 if ((elf = readelf(filename)) == NULL) { 726 if ((elf = readelf(filename)) == NULL) {
433 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 727 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
434 return; 728 return;
435 } 729 }
436 730
437 if (be_verbose > 1) 731 if (be_verbose > 1)
438 printf("%s: scanning file {%s,%s}\n", filename, 732 printf("%s: scanning file {%s,%s}\n", filename,
439 get_elfeitype(elf, EI_CLASS, elf->elf_class), 733 get_elfeitype(EI_CLASS, elf->elf_class),
440 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 734 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
441 else if (be_verbose) 735 else if (be_verbose)
442 printf("%s: scanning file\n", filename); 736 printf("%s: scanning file\n", filename);
443 737
444 /* init output buffer */ 738 /* init output buffer */
445 if (!out_buffer) { 739 if (!out_buffer) {
449 *out_buffer = '\0'; 743 *out_buffer = '\0';
450 744
451 /* show the header */ 745 /* show the header */
452 if (!be_quiet && show_banner) { 746 if (!be_quiet && show_banner) {
453 for (i = 0; out_format[i]; ++i) { 747 for (i = 0; out_format[i]; ++i) {
454 if (out_format[i] != '%') continue; 748 if (!IS_MODIFIER(out_format[i])) continue;
455 749
456 switch (out_format[++i]) { 750 switch (out_format[++i]) {
457 case '%': break; 751 case '%': break;
752 case '#': break;
753 case 'F':
754 case 'p':
458 case 'F': prints("FILE "); found_file = 1; break; 755 case 'f': prints("FILE "); found_file = 1; break;
459 case 'o': prints(" TYPE "); break; 756 case 'o': prints(" TYPE "); break;
460 case 'x': prints(" PAX "); break; 757 case 'x': prints(" PAX "); break;
461 case 'e': prints("STK/REL "); break; 758 case 'e': prints("STK/REL/PTL "); break;
462 case 't': prints("TEXTREL "); break; 759 case 't': prints("TEXTREL "); break;
463 case 'r': prints("RPATH "); break; 760 case 'r': prints("RPATH "); break;
464 case 'n': prints("NEEDED "); break; 761 case 'n': prints("NEEDED "); break;
465 case 'i': prints("INTERP "); break; 762 case 'i': prints("INTERP "); break;
466 case 'b': prints("BIND "); break; 763 case 'b': prints("BIND "); break;
764 case 'S': prints("SONAME "); break;
467 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]);
468 } 769 }
469 } 770 }
470 if (!found_file) prints("FILE "); 771 if (!found_file) prints("FILE ");
471 prints("\n"); 772 prints("\n");
472 found_file = 0; 773 found_file = 0;
474 } 775 }
475 776
476 /* dump all the good stuff */ 777 /* dump all the good stuff */
477 for (i = 0; out_format[i]; ++i) { 778 for (i = 0; out_format[i]; ++i) {
478 const char *out; 779 const char *out;
780 const char *tmp;
479 781
480 /* make sure we trim leading spaces in quiet mode */ 782 /* make sure we trim leading spaces in quiet mode */
481 if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) 783 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
482 *out_buffer = '\0'; 784 *out_buffer = '\0';
483 785
484 if (out_format[i] != '%') { 786 if (!IS_MODIFIER(out_format[i])) {
485 xchrcat(&out_buffer, out_format[i], &out_len); 787 xchrcat(&out_buffer, out_format[i], &out_len);
486 continue; 788 continue;
487 } 789 }
488 790
489 out = NULL; 791 out = NULL;
792 be_wewy_wewy_quiet = (out_format[i] == '#');
490 switch (out_format[++i]) { 793 switch (out_format[++i]) {
794 case '%':
795 case '#':
491 case '%': xchrcat(&out_buffer, '%', &out_len); break; 796 xchrcat(&out_buffer, out_format[i], &out_len); break;
492 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;
493 case 'o': out = get_elfetype(elf); break; 823 case 'o': out = get_elfetype(elf); break;
494 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 824 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
495 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;
496 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;
497 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':
498 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;
499 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 831 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
500 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;
501 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]);
502 } 836 }
503 if (out) xstrcat(&out_buffer, out, &out_len); 837 if (out) xstrcat(&out_buffer, out, &out_len);
504 } 838 }
505 839
506#define FOUND_SOMETHING() \ 840#define FOUND_SOMETHING() \
507 (found_pax || found_stack || found_textrel || found_rpath || \ 841 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
508 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)
509 844
510 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 845 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
511 xchrcat(&out_buffer, ' ', &out_len); 846 xchrcat(&out_buffer, ' ', &out_len);
512 xstrcat(&out_buffer, filename, &out_len); 847 xstrcat(&out_buffer, filename, &out_len);
513 } 848 }
514 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 849 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
515 puts(out_buffer); 850 puts(out_buffer);
851 fflush(stdout);
852 }
516 853
517 unreadelf(elf); 854 unreadelf(elf);
518} 855}
519 856
520/* 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 */
549 while ((dentry = readdir(dir))) { 886 while ((dentry = readdir(dir))) {
550 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 887 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
551 continue; 888 continue;
552 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 889 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
553 if (len >= sizeof(buf)) { 890 if (len >= sizeof(buf)) {
554 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));
555 continue; 893 continue;
556 } 894 }
557 sprintf(buf, "%s/%s", path, dentry->d_name); 895 sprintf(buf, "%s/%s", path, dentry->d_name);
558 if (lstat(buf, &st) != -1) { 896 if (lstat(buf, &st) != -1) {
559 if (S_ISREG(st.st_mode)) 897 if (S_ISREG(st.st_mode))
579 return 1; 917 return 1;
580 918
581 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 919 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
582 if ((p = strchr(path, '\n')) != NULL) 920 if ((p = strchr(path, '\n')) != NULL)
583 *p = 0; 921 *p = 0;
922 search_path = path;
584 scanelf_dir(path); 923 scanelf_dir(path);
585 } 924 }
586 if (fp != stdin) 925 if (fp != stdin)
587 fclose(fp); 926 fclose(fp);
588 return 0; 927 return 0;
660} 999}
661 1000
662 1001
663 1002
664/* usage / invocation handling functions */ 1003/* usage / invocation handling functions */
665#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" 1004#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV"
666#define a_argument required_argument 1005#define a_argument required_argument
667static struct option const long_opts[] = { 1006static struct option const long_opts[] = {
668 {"path", no_argument, NULL, 'p'}, 1007 {"path", no_argument, NULL, 'p'},
669 {"ldpath", no_argument, NULL, 'l'}, 1008 {"ldpath", no_argument, NULL, 'l'},
670 {"recursive", no_argument, NULL, 'R'}, 1009 {"recursive", no_argument, NULL, 'R'},
675 {"textrel", no_argument, NULL, 't'}, 1014 {"textrel", no_argument, NULL, 't'},
676 {"rpath", no_argument, NULL, 'r'}, 1015 {"rpath", no_argument, NULL, 'r'},
677 {"needed", no_argument, NULL, 'n'}, 1016 {"needed", no_argument, NULL, 'n'},
678 {"interp", no_argument, NULL, 'i'}, 1017 {"interp", no_argument, NULL, 'i'},
679 {"bind", no_argument, NULL, 'b'}, 1018 {"bind", no_argument, NULL, 'b'},
1019 {"soname", no_argument, NULL, 'S'},
680 {"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'},
681 {"all", no_argument, NULL, 'a'}, 1024 {"all", no_argument, NULL, 'a'},
682 {"quiet", no_argument, NULL, 'q'}, 1025 {"quiet", no_argument, NULL, 'q'},
683 {"verbose", no_argument, NULL, 'v'}, 1026 {"verbose", no_argument, NULL, 'v'},
684 {"format", a_argument, NULL, 'F'}, 1027 {"format", a_argument, NULL, 'F'},
685 {"from", a_argument, NULL, 'f'}, 1028 {"from", a_argument, NULL, 'f'},
686 {"file", a_argument, NULL, 'o'}, 1029 {"file", a_argument, NULL, 'o'},
687 {"nobanner", no_argument, NULL, 'B'}, 1030 {"nobanner", no_argument, NULL, 'B'},
688 {"help", no_argument, NULL, 'h'}, 1031 {"help", no_argument, NULL, 'h'},
689 {"version", no_argument, NULL, 'V'}, 1032 {"version", no_argument, NULL, 'V'},
690 {NULL, no_argument, NULL, 0x0} 1033 {NULL, no_argument, NULL, 0x0}
691}; 1034};
692 1035
693static char *opts_help[] = { 1036static const char *opts_help[] = {
694 "Scan all directories in PATH environment", 1037 "Scan all directories in PATH environment",
695 "Scan all directories in /etc/ld.so.conf", 1038 "Scan all directories in /etc/ld.so.conf",
696 "Scan directories recursively", 1039 "Scan directories recursively",
697 "Don't recursively cross mount points", 1040 "Don't recursively cross mount points",
698 "Don't scan symlinks\n", 1041 "Don't scan symlinks\n",
699 "Print PaX markings", 1042 "Print PaX markings",
700 "Print GNU_STACK markings", 1043 "Print GNU_STACK/PT_LOAD markings",
701 "Print TEXTREL information", 1044 "Print TEXTREL information",
702 "Print RPATH information", 1045 "Print RPATH information",
703 "Print NEEDED information", 1046 "Print NEEDED information",
704 "Print INTERP information", 1047 "Print INTERP information",
705 "Print BIND information", 1048 "Print BIND information",
1049 "Print SONAME information",
706 "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",
707 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1054 "Print all scanned info (-x -e -t -r -b)\n",
708 "Only output 'bad' things", 1055 "Only output 'bad' things",
709 "Be verbose (can be specified more than once)", 1056 "Be verbose (can be specified more than once)",
710 "Use specified format for output", 1057 "Use specified format for output",
711 "Read input stream from a filename", 1058 "Read input stream from a filename",
712 "Write output stream to a filename", 1059 "Write output stream to a filename",
733 1080
734 if (status != EXIT_SUCCESS) 1081 if (status != EXIT_SUCCESS)
735 exit(status); 1082 exit(status);
736 1083
737 puts("\nThe format modifiers for the -F option are:"); 1084 puts("\nThe format modifiers for the -F option are:");
738 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO"); 1085 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
739 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED"); 1086 puts(" t TEXTREL \tr RPATH \tn NEEDED");
740 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)");
741 1093
742 exit(status); 1094 exit(status);
743} 1095}
744 1096
745/* parse command line arguments and preform needed actions */ 1097/* parse command line arguments and preform needed actions */
751 opterr = 0; 1103 opterr = 0;
752 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) {
753 switch (i) { 1105 switch (i) {
754 1106
755 case 'V': 1107 case 'V':
756 printf("%s compiled %s\n%s\n" 1108 printf("pax-utils-%s: %s compiled %s\n%s\n"
757 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1109 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
758 __FILE__, __DATE__, rcsid, argv0); 1110 VERSION, __FILE__, __DATE__, rcsid, argv0);
759 exit(EXIT_SUCCESS); 1111 exit(EXIT_SUCCESS);
760 break; 1112 break;
761 case 'h': usage(EXIT_SUCCESS); break; 1113 case 'h': usage(EXIT_SUCCESS); break;
762 case 'f': 1114 case 'f':
763 if (from_file == NULL) 1115 if (from_file) err("Don't specify -f twice");
764 from_file = xstrdup(optarg); 1116 from_file = xstrdup(optarg);
765 break; 1117 break;
766 case 'o': { 1118 case 'o': {
767 FILE *fp = NULL; 1119 FILE *fp = NULL;
768 fp = freopen(optarg, "w", stdout); 1120 if ((fp = freopen(optarg, "w", stdout)) == NULL)
769 if (fp == NULL)
770 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1121 err("Could not open output stream '%s': %s", optarg, strerror(errno));
771 stdout = fp; 1122 SET_STDOUT(fp);
772 break; 1123 break;
773 } 1124 }
774 1125
775 case 's': { 1126 case 's': {
776 size_t len; 1127 size_t len;
1128 if (find_sym) err("Don't specify -s twice");
777 find_sym = xstrdup(optarg); 1129 find_sym = xstrdup(optarg);
778 len = strlen(find_sym) + 1; 1130 len = strlen(find_sym) + 1;
779 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1131 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
780 sprintf(versioned_symname, "%s@", find_sym); 1132 sprintf(versioned_symname, "%s@", find_sym);
781 break; 1133 break;
782 } 1134 }
1135 case 'N': {
1136 if (find_lib) err("Don't specify -N twice");
1137 find_lib = xstrdup(optarg);
1138 break;
1139 }
783 1140
784 case 'F': { 1141 case 'F': {
1142 if (out_format) err("Don't specify -F twice");
785 out_format = xstrdup(optarg); 1143 out_format = xstrdup(optarg);
786 break; 1144 break;
787 } 1145 }
788 1146
1147 case 'g': gmatch = 1;
789 case 'y': scan_symlink = 0; break; 1148 case 'y': scan_symlink = 0; break;
790 case 'B': show_banner = 0; break; 1149 case 'B': show_banner = 0; break;
791 case 'l': scan_ldpath = 1; break; 1150 case 'l': scan_ldpath = 1; break;
792 case 'p': scan_envpath = 1; break; 1151 case 'p': scan_envpath = 1; break;
793 case 'R': dir_recurse = 1; break; 1152 case 'R': dir_recurse = 1; break;
794 case 'm': dir_crossmount = 0; break; 1153 case 'm': dir_crossmount = 0; break;
795 case 'x': show_pax = 1; break; 1154 case 'x': show_pax = 1; break;
796 case 'e': show_stack = 1; break; 1155 case 'e': show_phdr = 1; break;
797 case 't': show_textrel = 1; break; 1156 case 't': show_textrel = 1; break;
798 case 'r': show_rpath = 1; break; 1157 case 'r': show_rpath = 1; break;
799 case 'n': show_needed = 1; break; 1158 case 'n': show_needed = 1; break;
800 case 'i': show_interp = 1; break; 1159 case 'i': show_interp = 1; break;
801 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;
802 case 'q': be_quiet = 1; break; 1163 case 'q': be_quiet = 1; break;
803 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1164 case 'v': be_verbose = (be_verbose % 20) + 1; break;
804 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;
805 show_needed = show_interp = show_bind = 1; break;
806 1166
807 case ':': 1167 case ':':
808 err("Option missing parameter\n"); 1168 err("Option missing parameter\n");
809 case '?': 1169 case '?':
810 err("Unknown option\n"); 1170 err("Unknown option\n");
813 } 1173 }
814 } 1174 }
815 1175
816 /* let the format option override all other options */ 1176 /* let the format option override all other options */
817 if (out_format) { 1177 if (out_format) {
818 show_pax = show_stack = show_textrel = show_rpath = \ 1178 show_pax = show_phdr = show_textrel = show_rpath = \
819 show_needed = show_interp = show_bind = 0; 1179 show_needed = show_interp = show_bind = show_soname = \
1180 show_textrels = 0;
820 for (i = 0; out_format[i]; ++i) { 1181 for (i = 0; out_format[i]; ++i) {
821 if (out_format[i] != '%') continue; 1182 if (!IS_MODIFIER(out_format[i])) continue;
822 1183
823 switch (out_format[++i]) { 1184 switch (out_format[++i]) {
824 case '%': break; 1185 case '%': break;
1186 case '#': break;
825 case 'F': break; 1187 case 'F': break;
1188 case 'p': break;
1189 case 'f': break;
826 case 's': break; 1190 case 's': break;
1191 case 'N': break;
827 case 'o': break; 1192 case 'o': break;
828 case 'x': show_pax = 1; break; 1193 case 'x': show_pax = 1; break;
829 case 'e': show_stack = 1; break; 1194 case 'e': show_phdr = 1; break;
830 case 't': show_textrel = 1; break; 1195 case 't': show_textrel = 1; break;
831 case 'r': show_rpath = 1; break; 1196 case 'r': show_rpath = 1; break;
832 case 'n': show_needed = 1; break; 1197 case 'n': show_needed = 1; break;
833 case 'i': show_interp = 1; break; 1198 case 'i': show_interp = 1; break;
834 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;
835 default: 1202 default:
836 err("Invalid format specifier '%c' (byte %i)", 1203 err("Invalid format specifier '%c' (byte %i)",
837 out_format[i], i+1); 1204 out_format[i], i+1);
838 } 1205 }
839 } 1206 }
840 1207
841 /* construct our default format */ 1208 /* construct our default format */
842 } else { 1209 } else {
843 size_t fmt_len = 30; 1210 size_t fmt_len = 30;
844 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1211 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
845 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1212 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
846 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1213 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
847 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); 1214 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
848 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1215 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
849 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1216 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
850 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1217 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
851 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1218 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
852 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);
853 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);
854 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1224 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
855 } 1225 }
856 if (be_verbose > 2) printf("Format: %s\n", out_format); 1226 if (be_verbose > 2) printf("Format: %s\n", out_format);
857 1227
858 /* now lets actually do the scanning */ 1228 /* now lets actually do the scanning */
859 if (scan_ldpath || (show_rpath && be_quiet)) 1229 if (scan_ldpath || (show_rpath && be_quiet))
865 free(from_file); 1235 free(from_file);
866 from_file = *argv; 1236 from_file = *argv;
867 } 1237 }
868 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1238 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
869 err("Nothing to scan !?"); 1239 err("Nothing to scan !?");
870 while (optind < argc) 1240 while (optind < argc) {
871 scanelf_dir(argv[optind++]); 1241 search_path = argv[optind++];
1242 scanelf_dir(search_path);
1243 }
872 1244
873 /* clean up */ 1245 /* clean up */
874 if (find_sym) { 1246 if (find_sym) {
875 free(find_sym); 1247 free(find_sym);
876 free(versioned_symname); 1248 free(versioned_symname);
877 } 1249 }
1250 if (find_lib) free(find_lib);
878 if (out_format) free(out_format); 1251 if (out_format) free(out_format);
879 for (i = 0; ldpaths[i]; ++i) 1252 for (i = 0; ldpaths[i]; ++i)
880 free(ldpaths[i]); 1253 free(ldpaths[i]);
881} 1254}
882 1255
897 return ret; 1270 return ret;
898} 1271}
899 1272
900static void xstrcat(char **dst, const char *src, size_t *curr_len) 1273static void xstrcat(char **dst, const char *src, size_t *curr_len)
901{ 1274{
902 long new_len; 1275 size_t new_len;
903 1276
904 new_len = strlen(*dst) + strlen(src); 1277 new_len = strlen(*dst) + strlen(src);
905 if (*curr_len <= new_len) { 1278 if (*curr_len <= new_len) {
906 *curr_len = new_len + (*curr_len / 2); 1279 *curr_len = new_len + (*curr_len / 2);
907 *dst = realloc(*dst, *curr_len); 1280 *dst = realloc(*dst, *curr_len);
919 my_app[1] = '\0'; 1292 my_app[1] = '\0';
920 xstrcat(dst, my_app, curr_len); 1293 xstrcat(dst, my_app, curr_len);
921} 1294}
922 1295
923 1296
1297
924int main(int argc, char *argv[]) 1298int main(int argc, char *argv[])
925{ 1299{
926 if (argc < 2) 1300 if (argc < 2)
927 usage(EXIT_FAILURE); 1301 usage(EXIT_FAILURE);
928 parseargs(argc, argv); 1302 parseargs(argc, argv);
929 fclose(stdout); 1303 fclose(stdout);
1304#ifdef __BOUNDS_CHECKING_ON
1305 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()");
1306#endif
930 return EXIT_SUCCESS; 1307 return EXIT_SUCCESS;
931} 1308}

Legend:
Removed from v.1.60  
changed lines
  Added in v.1.91

  ViewVC Help
Powered by ViewVC 1.1.20