/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.57 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 1.57 2005/05/21 17:58:30 solar 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>
13#include <libgen.h>
14#include <limits.h>
27#define __USE_GNU 15#define __USE_GNU
28#include <string.h> 16#include <string.h>
29#include <errno.h> 17#include <errno.h>
30#include <unistd.h> 18#include <unistd.h>
31#include <sys/stat.h> 19#include <sys/stat.h>
32#include <dirent.h> 20#include <dirent.h>
33#include <getopt.h> 21#include <getopt.h>
34#include <assert.h> 22#include <assert.h>
35
36#include "paxelf.h" 23#include "paxinc.h"
37 24
38static const char *rcsid = "$Id: scanelf.c,v 1.57 2005/05/21 17:58:30 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);
45static void scanelf_dir(const char *path); 34static void scanelf_dir(const char *path);
46static void scanelf_ldpath(); 35static void scanelf_ldpath();
47static void scanelf_envpath(); 36static void scanelf_envpath();
48static void usage(int status); 37static void usage(int status);
49static void parseargs(int argc, char *argv[]); 38static void parseargs(int argc, char *argv[]);
50static char *xstrdup(char *s); 39static char *xstrdup(const char *s);
51static void *xmalloc(size_t size); 40static void *xmalloc(size_t size);
52static void xstrcat(char **dst, const char *src, size_t *curr_len); 41static void xstrcat(char **dst, const char *src, size_t *curr_len);
53static inline void xchrcat(char **dst, const char append, size_t *curr_len); 42static inline void xchrcat(char **dst, const char append, size_t *curr_len);
54 43
55/* variables to control behavior */ 44/* variables to control behavior */
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;
74 67static char *search_path = NULL;
68static char gmatch = 0;
75 69
76 70
77/* 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}
78static char *scanelf_file_pax(elfobj *elf, char *found_pax) 98static char *scanelf_file_pax(elfobj *elf, char *found_pax)
79{ 99{
80 static char *paxflags; 100 static char ret[7];
101 unsigned long i, shown;
81 102
82 if (!show_pax) return NULL; 103 if (!show_pax) return NULL;
83 104
84 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
85 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
86 *found_pax = 1;
87 return paxflags;
88 }
89
90 return NULL;
91}
92static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
93{
94 static char ret[8] = "--- ---";
95 char *found;
96 unsigned long i, off, shown;
97
98 if (!show_stack) return NULL;
99
100 shown = 0; 105 shown = 0;
106 memset(&ret, 0, sizeof(ret));
101 107
102 if (elf->phdr) { 108 if (elf->phdr) {
103#define SHOW_STACK(B) \ 109#define SHOW_PAX(B) \
104 if (elf->elf_class == ELFCLASS ## B) { \ 110 if (elf->elf_class == ELFCLASS ## B) { \
105 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 111 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
106 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 112 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
107 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 113 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
108 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \ 114 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
109 found = found_stack; \
110 off = 0; \
111 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
112 found = found_relro; \
113 off = 4; \
114 } else \
115 continue; \ 115 continue; \
116 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 116 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \
117 continue; \ 117 continue; \
118 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); \
119 *found = 1; \ 119 *found_pax = 1; \
120 ++shown; \ 120 ++shown; \
121 break; \
121 } \ 122 } \
122 } 123 }
123 SHOW_STACK(32) 124 SHOW_PAX(32)
124 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);
125 } 135 }
136 strncpy(ret, paxflags, sizeof(ret));
137 }
126 138
127 if (be_quiet && !shown) 139 if (be_wewy_wewy_quiet || (be_quiet && !shown))
128 return NULL; 140 return NULL;
129 else 141 else
130 return ret; 142 return ret;
131} 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}
132static char *scanelf_file_textrel(elfobj *elf, char *found_textrel) 228static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
133{ 229{
134 static char *ret = "TEXTREL"; 230 static const char *ret = "TEXTREL";
135 unsigned long i; 231 unsigned long i;
136 232
137 if (!show_textrel) return NULL; 233 if (!show_textrel && !show_textrels) return NULL;
138 234
139 if (elf->phdr) { 235 if (elf->phdr) {
140#define SHOW_TEXTREL(B) \ 236#define SHOW_TEXTREL(B) \
141 if (elf->elf_class == ELFCLASS ## B) { \ 237 if (elf->elf_class == ELFCLASS ## B) { \
142 Elf ## B ## _Dyn *dyn; \ 238 Elf ## B ## _Dyn *dyn; \
143 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 239 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
144 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 240 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
145 Elf ## B ## _Off offset; \ 241 Elf ## B ## _Off offset; \
146 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 242 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
147 if (phdr[i].p_type != PT_DYNAMIC) continue; \ 243 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
148 offset = EGET(phdr[i].p_offset); \ 244 offset = EGET(phdr[i].p_offset); \
149 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 245 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
150 dyn = DYN ## B (elf->data + offset); \ 246 dyn = DYN ## B (elf->data + offset); \
151 while (EGET(dyn->d_tag) != DT_NULL) { \ 247 while (EGET(dyn->d_tag) != DT_NULL) { \
152 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)*/ \
153 *found_textrel = 1; \ 249 *found_textrel = 1; \
154 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 250 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
155 return ret; \ 251 return (be_wewy_wewy_quiet ? NULL : ret); \
156 } \ 252 } \
157 ++dyn; \ 253 ++dyn; \
158 } \ 254 } \
159 } } 255 } }
160 SHOW_TEXTREL(32) 256 SHOW_TEXTREL(32)
161 SHOW_TEXTREL(64) 257 SHOW_TEXTREL(64)
162 } 258 }
163 259
164 if (be_quiet) 260 if (be_quiet || be_wewy_wewy_quiet)
165 return NULL; 261 return NULL;
166 else 262 else
167 return " - "; 263 return " - ";
168} 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}
169static 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)
170{ 390{
171 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
172 unsigned long i, s; 391 unsigned long i, s;
173 char *rpath, *runpath, **r; 392 char *rpath, *runpath, **r;
174 void *strtbl_void; 393 void *strtbl_void;
175 394
176 if (!show_rpath) return; 395 if (!show_rpath) return;
184 Elf ## B ## _Dyn *dyn; \ 403 Elf ## B ## _Dyn *dyn; \
185 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 404 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
186 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 405 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
187 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 406 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
188 Elf ## B ## _Off offset; \ 407 Elf ## B ## _Off offset; \
189 Elf ## B ## _Sxword word; \ 408 Elf ## B ## _Xword word; \
190 /* Scan all the program headers */ \ 409 /* Scan all the program headers */ \
191 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 410 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
192 /* Just scan dynamic headers */ \ 411 /* Just scan dynamic headers */ \
193 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 412 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
194 offset = EGET(phdr[i].p_offset); \ 413 offset = EGET(phdr[i].p_offset); \
204 ++dyn; \ 423 ++dyn; \
205 continue; \ 424 continue; \
206 } \ 425 } \
207 /* Verify the memory is somewhat sane */ \ 426 /* Verify the memory is somewhat sane */ \
208 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 427 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
209 if (offset < elf->len) { \ 428 if (offset < (Elf ## B ## _Off)elf->len) { \
210 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \ 429 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
211 *r = (char*)(elf->data + offset); \ 430 *r = (char*)(elf->data + offset); \
212 /* If quiet, don't output paths in ld.so.conf */ \ 431 /* If quiet, don't output paths in ld.so.conf */ \
213 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)); \
214 for (s = 0; ldpaths[s]; ++s) \ 443 for (s = 0; ldpaths[s]; ++s) { \
215 if (!strcmp(ldpaths[s], *r)) { \ 444 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
216 *r = NULL; \ 445 *r = (end ? end + 1 : NULL); \
217 break; \ 446 break; \
447 } \
218 } \ 448 } \
449 if (!*r || !ldpaths[s] || !end) \
450 start = NULL; \
451 else \
452 start = start + len + 1; \
453 } \
454 } \
219 if (*r) *found_rpath = 1; \ 455 if (*r) *found_rpath = 1; \
220 } \ 456 } \
221 ++dyn; \ 457 ++dyn; \
222 } \ 458 } \
223 } } 459 } }
224 SHOW_RPATH(32) 460 SHOW_RPATH(32)
225 SHOW_RPATH(64) 461 SHOW_RPATH(64)
226 } 462 }
463
464 if (be_wewy_wewy_quiet) return;
227 465
228 if (rpath && runpath) { 466 if (rpath && runpath) {
229 if (!strcmp(rpath, runpath)) { 467 if (!strcmp(rpath, runpath)) {
230 xstrcat(ret, runpath, ret_len); 468 xstrcat(ret, runpath, ret_len);
231 } else { 469 } else {
239 } else if (rpath || runpath) 477 } else if (rpath || runpath)
240 xstrcat(ret, (runpath ? runpath : rpath), ret_len); 478 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
241 else if (!be_quiet) 479 else if (!be_quiet)
242 xstrcat(ret, " - ", ret_len); 480 xstrcat(ret, " - ", ret_len);
243} 481}
244static 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)
245{ 483{
246 unsigned long i; 484 unsigned long i;
247 char *needed; 485 char *needed;
248 void *strtbl_void; 486 void *strtbl_void;
249 487
250 if (!show_needed) return; 488 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
251 489
252 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 490 strtbl_void = elf_findsecbyname(elf, ".dynstr");
253 491
254 if (elf->phdr && strtbl_void) { 492 if (elf->phdr && strtbl_void) {
255#define SHOW_NEEDED(B) \ 493#define SHOW_NEEDED(B) \
265 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \ 503 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
266 dyn = DYN ## B (elf->data + offset); \ 504 dyn = DYN ## B (elf->data + offset); \
267 while (EGET(dyn->d_tag) != DT_NULL) { \ 505 while (EGET(dyn->d_tag) != DT_NULL) { \
268 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 506 if (EGET(dyn->d_tag) == DT_NEEDED) { \
269 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 507 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
270 if (offset >= elf->len) { \ 508 if (offset >= (Elf ## B ## _Off)elf->len) { \
271 ++dyn; \ 509 ++dyn; \
272 continue; \ 510 continue; \
273 } \ 511 } \
274 needed = (char*)(elf->data + offset); \ 512 needed = (char*)(elf->data + offset); \
513 if (op == 0) { \
514 if (!be_wewy_wewy_quiet) { \
275 if (*found_needed) xchrcat(ret, ',', ret_len); \ 515 if (*found_needed) xchrcat(ret, ',', ret_len); \
276 xstrcat(ret, needed, ret_len); \ 516 xstrcat(ret, needed, ret_len); \
517 } \
277 *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 } \
278 } \ 525 } \
279 ++dyn; \ 526 ++dyn; \
280 } \ 527 } \
281 } } 528 } }
282 SHOW_NEEDED(32) 529 SHOW_NEEDED(32)
283 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);
284 } 533 }
534
535 return NULL;
285} 536}
286static char *scanelf_file_interp(elfobj *elf, char *found_interp) 537static char *scanelf_file_interp(elfobj *elf, char *found_interp)
287{ 538{
288 void *strtbl_void; 539 void *strtbl_void;
289 540
294 if (strtbl_void) { 545 if (strtbl_void) {
295#define SHOW_INTERP(B) \ 546#define SHOW_INTERP(B) \
296 if (elf->elf_class == ELFCLASS ## B) { \ 547 if (elf->elf_class == ELFCLASS ## B) { \
297 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 548 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
298 *found_interp = 1; \ 549 *found_interp = 1; \
299 return elf->data + EGET(strtbl->sh_offset); \ 550 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
300 } 551 }
301 SHOW_INTERP(32) 552 SHOW_INTERP(32)
302 SHOW_INTERP(64) 553 SHOW_INTERP(64)
303 } 554 }
304 return NULL; 555 return NULL;
326 if (EGET(dyn->d_tag) == DT_BIND_NOW || \ 577 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
327 (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)) \
328 { \ 579 { \
329 if (be_quiet) return NULL; \ 580 if (be_quiet) return NULL; \
330 *found_bind = 1; \ 581 *found_bind = 1; \
331 return "NOW"; \ 582 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
332 } \ 583 } \
333 ++dyn; \ 584 ++dyn; \
334 } \ 585 } \
335 } \ 586 } \
336 } 587 }
337 SHOW_BIND(32) 588 SHOW_BIND(32)
338 SHOW_BIND(64) 589 SHOW_BIND(64)
339 590
591 if (be_wewy_wewy_quiet) return NULL;
592
340 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)) {
341 return NULL; 594 return NULL;
342 } else { 595 } else {
343 *found_bind = 1; 596 *found_bind = 1;
344 return "LAZY"; 597 return (char *) "LAZY";
345 } 598 }
346} 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}
347static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 646static char *scanelf_file_sym(elfobj *elf, char *found_sym)
348{ 647{
349 unsigned long i; 648 unsigned long i;
350 void *symtab_void, *strtab_void; 649 void *symtab_void, *strtab_void;
351 650
352 if (!find_sym) return NULL; 651 if (!find_sym) return NULL;
353 652
354 symtab_void = elf_findsecbyname(elf, ".symtab"); 653 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
355 strtab_void = elf_findsecbyname(elf, ".strtab");
356 654
357 if (symtab_void && strtab_void) { 655 if (symtab_void && strtab_void) {
358#define FIND_SYM(B) \ 656#define FIND_SYM(B) \
359 if (elf->elf_class == ELFCLASS ## B) { \ 657 if (elf->elf_class == ELFCLASS ## B) { \
360 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 658 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
366 if (sym->st_name) { \ 664 if (sym->st_name) { \
367 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)); \
368 if (*find_sym == '*') { \ 666 if (*find_sym == '*') { \
369 printf("%s(%s) %5lX %15s %s\n", \ 667 printf("%s(%s) %5lX %15s %s\n", \
370 ((*found_sym == 0) ? "\n\t" : "\t"), \ 668 ((*found_sym == 0) ? "\n\t" : "\t"), \
371 (char *)basename(filename), \ 669 elf->base_filename, \
372 (long)sym->st_size, \ 670 (long)sym->st_size, \
373 (char *)get_elfstttype(sym->st_info), \ 671 (char *)get_elfstttype(sym->st_info), \
374 symname); \ 672 symname); \
375 *found_sym = 1; \ 673 *found_sym = 1; \
376 } else if ((strcmp(find_sym, symname) == 0) || \ 674 } else if ((strcmp(find_sym, symname) == 0) || \
380 ++sym; \ 678 ++sym; \
381 } } 679 } }
382 FIND_SYM(32) 680 FIND_SYM(32)
383 FIND_SYM(64) 681 FIND_SYM(64)
384 } 682 }
683
684 if (be_wewy_wewy_quiet) return NULL;
685
385 if (*find_sym != '*' && *found_sym) 686 if (*find_sym != '*' && *found_sym)
386 return find_sym; 687 return find_sym;
387 if (be_quiet) 688 if (be_quiet)
388 return NULL; 689 return NULL;
389 else 690 else
390 return " - "; 691 return (char *)" - ";
391} 692}
392/* scan an elf file and show all the fun stuff */ 693/* scan an elf file and show all the fun stuff */
393// #define prints(str) fputs(str, stdout)
394#define prints(str) write(fileno(stdout), str, strlen(str)) 694#define prints(str) write(fileno(stdout), str, strlen(str))
395static void scanelf_file(const char *filename) 695static void scanelf_file(const char *filename)
396{ 696{
397 unsigned long i; 697 unsigned long i;
398 char found_pax, found_stack, found_relro, found_textrel, 698 char found_pax, found_phdr, found_relro, found_load, found_textrel,
399 found_rpath, found_needed, found_interp, found_bind, 699 found_rpath, found_needed, found_interp, found_bind, found_soname,
400 found_sym, found_file; 700 found_sym, found_lib, found_file, found_textrels;
401 elfobj *elf; 701 elfobj *elf;
402 struct stat st; 702 struct stat st;
403 static char *out_buffer = NULL; 703 static char *out_buffer = NULL;
404 static size_t out_len; 704 static size_t out_len;
405 705
416 if (!S_ISREG(st.st_mode)) { 716 if (!S_ISREG(st.st_mode)) {
417 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 717 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
418 return; 718 return;
419 } 719 }
420 720
421 found_pax = found_stack = found_relro = found_textrel = \ 721 found_pax = found_phdr = found_relro = found_load = found_textrel = \
422 found_rpath = found_needed = found_interp = found_bind = \ 722 found_rpath = found_needed = found_interp = found_bind = found_soname = \
423 found_sym = found_file = 0; 723 found_sym = found_lib = found_file = found_textrels = 0;
424 724
425 /* verify this is real ELF */ 725 /* verify this is real ELF */
426 if ((elf = readelf(filename)) == NULL) { 726 if ((elf = readelf(filename)) == NULL) {
427 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 727 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
428 return; 728 return;
429 } 729 }
430 730
431 if (be_verbose > 1) 731 if (be_verbose > 1)
432 printf("%s: scanning file {%s,%s}\n", filename, 732 printf("%s: scanning file {%s,%s}\n", filename,
433 get_elfeitype(elf, EI_CLASS, elf->elf_class), 733 get_elfeitype(EI_CLASS, elf->elf_class),
434 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 734 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
435 else if (be_verbose) 735 else if (be_verbose)
436 printf("%s: scanning file\n", filename); 736 printf("%s: scanning file\n", filename);
437 737
438 /* init output buffer */ 738 /* init output buffer */
439 if (!out_buffer) { 739 if (!out_buffer) {
443 *out_buffer = '\0'; 743 *out_buffer = '\0';
444 744
445 /* show the header */ 745 /* show the header */
446 if (!be_quiet && show_banner) { 746 if (!be_quiet && show_banner) {
447 for (i = 0; out_format[i]; ++i) { 747 for (i = 0; out_format[i]; ++i) {
448 if (out_format[i] != '%') continue; 748 if (!IS_MODIFIER(out_format[i])) continue;
449 749
450 switch (out_format[++i]) { 750 switch (out_format[++i]) {
451 case '%': break; 751 case '%': break;
752 case '#': break;
753 case 'F':
754 case 'p':
452 case 'F': prints("FILE "); found_file = 1; break; 755 case 'f': prints("FILE "); found_file = 1; break;
453 case 'o': prints(" TYPE "); break; 756 case 'o': prints(" TYPE "); break;
454 case 'x': prints(" PAX "); break; 757 case 'x': prints(" PAX "); break;
455 case 'e': prints("STK/REL "); break; 758 case 'e': prints("STK/REL/PTL "); break;
456 case 't': prints("TEXTREL "); break; 759 case 't': prints("TEXTREL "); break;
457 case 'r': prints("RPATH "); break; 760 case 'r': prints("RPATH "); break;
458 case 'n': prints("NEEDED "); break; 761 case 'n': prints("NEEDED "); break;
459 case 'i': prints("INTERP "); break; 762 case 'i': prints("INTERP "); break;
460 case 'b': prints("BIND "); break; 763 case 'b': prints("BIND "); break;
764 case 'S': prints("SONAME "); break;
461 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]);
462 } 769 }
463 } 770 }
464 if (!found_file) prints("FILE "); 771 if (!found_file) prints("FILE ");
465 prints("\n"); 772 prints("\n");
466 found_file = 0; 773 found_file = 0;
468 } 775 }
469 776
470 /* dump all the good stuff */ 777 /* dump all the good stuff */
471 for (i = 0; out_format[i]; ++i) { 778 for (i = 0; out_format[i]; ++i) {
472 const char *out; 779 const char *out;
780 const char *tmp;
473 781
474 /* make sure we trim leading spaces in quiet mode */ 782 /* make sure we trim leading spaces in quiet mode */
475 if (be_quiet && *out_buffer == ' ' && !out_buffer[1]) 783 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
476 *out_buffer = '\0'; 784 *out_buffer = '\0';
477 785
478 if (out_format[i] != '%') { 786 if (!IS_MODIFIER(out_format[i])) {
479 xchrcat(&out_buffer, out_format[i], &out_len); 787 xchrcat(&out_buffer, out_format[i], &out_len);
480 continue; 788 continue;
481 } 789 }
482 790
483 out = NULL; 791 out = NULL;
792 be_wewy_wewy_quiet = (out_format[i] == '#');
484 switch (out_format[++i]) { 793 switch (out_format[++i]) {
794 case '%':
795 case '#':
485 case '%': xchrcat(&out_buffer, '%', &out_len); break; 796 xchrcat(&out_buffer, out_format[i], &out_len); break;
486 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;
487 case 'o': out = get_elfetype(elf); break; 823 case 'o': out = get_elfetype(elf); break;
488 case 'x': out = scanelf_file_pax(elf, &found_pax); break; 824 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
489 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;
490 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;
491 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':
492 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;
493 case 'i': out = scanelf_file_interp(elf, &found_interp); break; 831 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
494 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;
495 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]);
496 } 836 }
497 if (out) xstrcat(&out_buffer, out, &out_len); 837 if (out) xstrcat(&out_buffer, out, &out_len);
498 } 838 }
499 839
500#define FOUND_SOMETHING() \ 840#define FOUND_SOMETHING() \
501 (found_pax || found_stack || found_textrel || found_rpath || \ 841 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
502 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)
503 844
504 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) { 845 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
505 xchrcat(&out_buffer, ' ', &out_len); 846 xchrcat(&out_buffer, ' ', &out_len);
506 xstrcat(&out_buffer, filename, &out_len); 847 xstrcat(&out_buffer, filename, &out_len);
507 } 848 }
508 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) 849 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
509 puts(out_buffer); 850 puts(out_buffer);
851 fflush(stdout);
852 }
510 853
511 unreadelf(elf); 854 unreadelf(elf);
512} 855}
513 856
514/* 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 */
543 while ((dentry = readdir(dir))) { 886 while ((dentry = readdir(dir))) {
544 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 887 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
545 continue; 888 continue;
546 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 889 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
547 if (len >= sizeof(buf)) { 890 if (len >= sizeof(buf)) {
548 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));
549 continue; 893 continue;
550 } 894 }
551 sprintf(buf, "%s/%s", path, dentry->d_name); 895 sprintf(buf, "%s/%s", path, dentry->d_name);
552 if (lstat(buf, &st) != -1) { 896 if (lstat(buf, &st) != -1) {
553 if (S_ISREG(st.st_mode)) 897 if (S_ISREG(st.st_mode))
573 return 1; 917 return 1;
574 918
575 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { 919 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
576 if ((p = strchr(path, '\n')) != NULL) 920 if ((p = strchr(path, '\n')) != NULL)
577 *p = 0; 921 *p = 0;
922 search_path = path;
578 scanelf_dir(path); 923 scanelf_dir(path);
579 } 924 }
580 if (fp != stdin) 925 if (fp != stdin)
581 fclose(fp); 926 fclose(fp);
582 return 0; 927 return 0;
654} 999}
655 1000
656 1001
657 1002
658/* usage / invocation handling functions */ 1003/* usage / invocation handling functions */
659#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV" 1004#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV"
660#define a_argument required_argument 1005#define a_argument required_argument
661static struct option const long_opts[] = { 1006static struct option const long_opts[] = {
662 {"path", no_argument, NULL, 'p'}, 1007 {"path", no_argument, NULL, 'p'},
663 {"ldpath", no_argument, NULL, 'l'}, 1008 {"ldpath", no_argument, NULL, 'l'},
664 {"recursive", no_argument, NULL, 'R'}, 1009 {"recursive", no_argument, NULL, 'R'},
669 {"textrel", no_argument, NULL, 't'}, 1014 {"textrel", no_argument, NULL, 't'},
670 {"rpath", no_argument, NULL, 'r'}, 1015 {"rpath", no_argument, NULL, 'r'},
671 {"needed", no_argument, NULL, 'n'}, 1016 {"needed", no_argument, NULL, 'n'},
672 {"interp", no_argument, NULL, 'i'}, 1017 {"interp", no_argument, NULL, 'i'},
673 {"bind", no_argument, NULL, 'b'}, 1018 {"bind", no_argument, NULL, 'b'},
1019 {"soname", no_argument, NULL, 'S'},
674 {"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'},
675 {"all", no_argument, NULL, 'a'}, 1024 {"all", no_argument, NULL, 'a'},
676 {"quiet", no_argument, NULL, 'q'}, 1025 {"quiet", no_argument, NULL, 'q'},
677 {"verbose", no_argument, NULL, 'v'}, 1026 {"verbose", no_argument, NULL, 'v'},
678 {"format", a_argument, NULL, 'F'}, 1027 {"format", a_argument, NULL, 'F'},
679 {"from", a_argument, NULL, 'f'}, 1028 {"from", a_argument, NULL, 'f'},
680 {"file", a_argument, NULL, 'o'}, 1029 {"file", a_argument, NULL, 'o'},
681 {"nobanner", no_argument, NULL, 'B'}, 1030 {"nobanner", no_argument, NULL, 'B'},
682 {"help", no_argument, NULL, 'h'}, 1031 {"help", no_argument, NULL, 'h'},
683 {"version", no_argument, NULL, 'V'}, 1032 {"version", no_argument, NULL, 'V'},
684 {NULL, no_argument, NULL, 0x0} 1033 {NULL, no_argument, NULL, 0x0}
685}; 1034};
686 1035
687static char *opts_help[] = { 1036static const char *opts_help[] = {
688 "Scan all directories in PATH environment", 1037 "Scan all directories in PATH environment",
689 "Scan all directories in /etc/ld.so.conf", 1038 "Scan all directories in /etc/ld.so.conf",
690 "Scan directories recursively", 1039 "Scan directories recursively",
691 "Don't recursively cross mount points", 1040 "Don't recursively cross mount points",
692 "Don't scan symlinks\n", 1041 "Don't scan symlinks\n",
693 "Print PaX markings", 1042 "Print PaX markings",
694 "Print GNU_STACK markings", 1043 "Print GNU_STACK/PT_LOAD markings",
695 "Print TEXTREL information", 1044 "Print TEXTREL information",
696 "Print RPATH information", 1045 "Print RPATH information",
697 "Print NEEDED information", 1046 "Print NEEDED information",
698 "Print INTERP information", 1047 "Print INTERP information",
699 "Print BIND information", 1048 "Print BIND information",
1049 "Print SONAME information",
700 "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",
701 "Print all scanned info (-x -e -t -r -n -i -b)\n", 1054 "Print all scanned info (-x -e -t -r -b)\n",
702 "Only output 'bad' things", 1055 "Only output 'bad' things",
703 "Be verbose (can be specified more than once)", 1056 "Be verbose (can be specified more than once)",
704 "Use specified format for output", 1057 "Use specified format for output",
705 "Read input stream from a filename", 1058 "Read input stream from a filename",
706 "Write output stream to a filename", 1059 "Write output stream to a filename",
727 1080
728 if (status != EXIT_SUCCESS) 1081 if (status != EXIT_SUCCESS)
729 exit(status); 1082 exit(status);
730 1083
731 puts("\nThe format modifiers for the -F option are:"); 1084 puts("\nThe format modifiers for the -F option are:");
732 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO"); 1085 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
733 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED"); 1086 puts(" t TEXTREL \tr RPATH \tn NEEDED");
734 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)");
735 1093
736 exit(status); 1094 exit(status);
737} 1095}
738 1096
739/* parse command line arguments and preform needed actions */ 1097/* parse command line arguments and preform needed actions */
745 opterr = 0; 1103 opterr = 0;
746 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) {
747 switch (i) { 1105 switch (i) {
748 1106
749 case 'V': 1107 case 'V':
750 printf("%s compiled %s\n%s\n" 1108 printf("pax-utils-%s: %s compiled %s\n%s\n"
751 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1109 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
752 __FILE__, __DATE__, rcsid, argv0); 1110 VERSION, __FILE__, __DATE__, rcsid, argv0);
753 exit(EXIT_SUCCESS); 1111 exit(EXIT_SUCCESS);
754 break; 1112 break;
755 case 'h': usage(EXIT_SUCCESS); break; 1113 case 'h': usage(EXIT_SUCCESS); break;
756 case 'f': 1114 case 'f':
757 if (from_file == NULL) 1115 if (from_file) err("Don't specify -f twice");
758 from_file = xstrdup(optarg); 1116 from_file = xstrdup(optarg);
759 break; 1117 break;
760 case 'o': { 1118 case 'o': {
761 FILE *fp = NULL; 1119 FILE *fp = NULL;
762 fp = freopen(optarg, "w", stdout); 1120 if ((fp = freopen(optarg, "w", stdout)) == NULL)
763 if (fp == NULL)
764 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1121 err("Could not open output stream '%s': %s", optarg, strerror(errno));
765 stdout = fp; 1122 SET_STDOUT(fp);
766 break; 1123 break;
767 } 1124 }
768 1125
769 case 's': { 1126 case 's': {
770 size_t len; 1127 size_t len;
1128 if (find_sym) err("Don't specify -s twice");
771 find_sym = xstrdup(optarg); 1129 find_sym = xstrdup(optarg);
772 len = strlen(find_sym) + 1; 1130 len = strlen(find_sym) + 1;
773 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1)); 1131 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
774 sprintf(versioned_symname, "%s@", find_sym); 1132 sprintf(versioned_symname, "%s@", find_sym);
775 break; 1133 break;
776 } 1134 }
1135 case 'N': {
1136 if (find_lib) err("Don't specify -N twice");
1137 find_lib = xstrdup(optarg);
1138 break;
1139 }
777 1140
778 case 'F': { 1141 case 'F': {
1142 if (out_format) err("Don't specify -F twice");
779 out_format = xstrdup(optarg); 1143 out_format = xstrdup(optarg);
780 break; 1144 break;
781 } 1145 }
782 1146
1147 case 'g': gmatch = 1;
783 case 'y': scan_symlink = 0; break; 1148 case 'y': scan_symlink = 0; break;
784 case 'B': show_banner = 0; break; 1149 case 'B': show_banner = 0; break;
785 case 'l': scan_ldpath = 1; break; 1150 case 'l': scan_ldpath = 1; break;
786 case 'p': scan_envpath = 1; break; 1151 case 'p': scan_envpath = 1; break;
787 case 'R': dir_recurse = 1; break; 1152 case 'R': dir_recurse = 1; break;
788 case 'm': dir_crossmount = 0; break; 1153 case 'm': dir_crossmount = 0; break;
789 case 'x': show_pax = 1; break; 1154 case 'x': show_pax = 1; break;
790 case 'e': show_stack = 1; break; 1155 case 'e': show_phdr = 1; break;
791 case 't': show_textrel = 1; break; 1156 case 't': show_textrel = 1; break;
792 case 'r': show_rpath = 1; break; 1157 case 'r': show_rpath = 1; break;
793 case 'n': show_needed = 1; break; 1158 case 'n': show_needed = 1; break;
794 case 'i': show_interp = 1; break; 1159 case 'i': show_interp = 1; break;
795 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;
796 case 'q': be_quiet = 1; break; 1163 case 'q': be_quiet = 1; break;
797 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1164 case 'v': be_verbose = (be_verbose % 20) + 1; break;
798 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;
799 show_needed = show_interp = show_bind = 1; break;
800 1166
801 case ':': 1167 case ':':
802 err("Option missing parameter\n"); 1168 err("Option missing parameter\n");
803 case '?': 1169 case '?':
804 err("Unknown option\n"); 1170 err("Unknown option\n");
807 } 1173 }
808 } 1174 }
809 1175
810 /* let the format option override all other options */ 1176 /* let the format option override all other options */
811 if (out_format) { 1177 if (out_format) {
812 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0; 1178 show_pax = show_phdr = show_textrel = show_rpath = \
1179 show_needed = show_interp = show_bind = show_soname = \
1180 show_textrels = 0;
813 for (i = 0; out_format[i]; ++i) { 1181 for (i = 0; out_format[i]; ++i) {
814 if (out_format[i] != '%') continue; 1182 if (!IS_MODIFIER(out_format[i])) continue;
815 1183
816 switch (out_format[++i]) { 1184 switch (out_format[++i]) {
817 case '%': break; 1185 case '%': break;
1186 case '#': break;
818 case 'F': break; 1187 case 'F': break;
1188 case 'p': break;
1189 case 'f': break;
819 case 's': break; 1190 case 's': break;
1191 case 'N': break;
820 case 'o': break; 1192 case 'o': break;
821 case 'x': show_pax = 1; break; 1193 case 'x': show_pax = 1; break;
822 case 'e': show_stack = 1; break; 1194 case 'e': show_phdr = 1; break;
823 case 't': show_textrel = 1; break; 1195 case 't': show_textrel = 1; break;
824 case 'r': show_rpath = 1; break; 1196 case 'r': show_rpath = 1; break;
825 case 'n': show_needed = 1; break; 1197 case 'n': show_needed = 1; break;
826 case 'i': show_interp = 1; break; 1198 case 'i': show_interp = 1; break;
827 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;
828 default: 1202 default:
829 err("Invalid format specifier '%c' (byte %i)", 1203 err("Invalid format specifier '%c' (byte %i)",
830 out_format[i], i+1); 1204 out_format[i], i+1);
831 } 1205 }
832 } 1206 }
833 1207
834 /* construct our default format */ 1208 /* construct our default format */
835 } else { 1209 } else {
836 size_t fmt_len = 30; 1210 size_t fmt_len = 30;
837 out_format = (char*)xmalloc(sizeof(char) * fmt_len); 1211 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
838 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len); 1212 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
839 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len); 1213 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
840 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len); 1214 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
841 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len); 1215 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
842 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len); 1216 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
843 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len); 1217 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
844 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len); 1218 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
845 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);
846 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);
847 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len); 1224 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
848 } 1225 }
849 if (be_verbose > 2) printf("Format: %s\n", out_format); 1226 if (be_verbose > 2) printf("Format: %s\n", out_format);
850 1227
851 /* now lets actually do the scanning */ 1228 /* now lets actually do the scanning */
852 if (scan_ldpath || (show_rpath && be_quiet)) 1229 if (scan_ldpath || (show_rpath && be_quiet))
858 free(from_file); 1235 free(from_file);
859 from_file = *argv; 1236 from_file = *argv;
860 } 1237 }
861 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file) 1238 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
862 err("Nothing to scan !?"); 1239 err("Nothing to scan !?");
863 while (optind < argc) 1240 while (optind < argc) {
864 scanelf_dir(argv[optind++]); 1241 search_path = argv[optind++];
1242 scanelf_dir(search_path);
1243 }
865 1244
866 /* clean up */ 1245 /* clean up */
867 if (find_sym) { 1246 if (find_sym) {
868 free(find_sym); 1247 free(find_sym);
869 free(versioned_symname); 1248 free(versioned_symname);
870 } 1249 }
1250 if (find_lib) free(find_lib);
871 if (out_format) free(out_format); 1251 if (out_format) free(out_format);
872 for (i = 0; ldpaths[i]; ++i) 1252 for (i = 0; ldpaths[i]; ++i)
873 free(ldpaths[i]); 1253 free(ldpaths[i]);
874} 1254}
875 1255
876 1256
877 1257
878/* utility funcs */ 1258/* utility funcs */
879static char *xstrdup(char *s) 1259static char *xstrdup(const char *s)
880{ 1260{
881 char *ret = strdup(s); 1261 char *ret = strdup(s);
882 if (!ret) err("Could not strdup(): %s", strerror(errno)); 1262 if (!ret) err("Could not strdup(): %s", strerror(errno));
883 return ret; 1263 return ret;
884} 1264}
890 return ret; 1270 return ret;
891} 1271}
892 1272
893static void xstrcat(char **dst, const char *src, size_t *curr_len) 1273static void xstrcat(char **dst, const char *src, size_t *curr_len)
894{ 1274{
895 long new_len; 1275 size_t new_len;
896 1276
897 new_len = strlen(*dst) + strlen(src); 1277 new_len = strlen(*dst) + strlen(src);
898 if (*curr_len <= new_len) { 1278 if (*curr_len <= new_len) {
899 *curr_len = new_len + (*curr_len / 2); 1279 *curr_len = new_len + (*curr_len / 2);
900 *dst = realloc(*dst, *curr_len); 1280 *dst = realloc(*dst, *curr_len);
912 my_app[1] = '\0'; 1292 my_app[1] = '\0';
913 xstrcat(dst, my_app, curr_len); 1293 xstrcat(dst, my_app, curr_len);
914} 1294}
915 1295
916 1296
1297
917int main(int argc, char *argv[]) 1298int main(int argc, char *argv[])
918{ 1299{
919 if (argc < 2) 1300 if (argc < 2)
920 usage(EXIT_FAILURE); 1301 usage(EXIT_FAILURE);
921 parseargs(argc, argv); 1302 parseargs(argc, argv);
922 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
923 return EXIT_SUCCESS; 1307 return EXIT_SUCCESS;
924} 1308}

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