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Revision 1.40 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 1.40 2005/04/21 00:13:03 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 1.40 2005/04/21 00:13:03 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[]);
39static char *xstrdup(const char *s);
40static void *xmalloc(size_t size);
41static void xstrcat(char **dst, const char *src, size_t *curr_len);
42static inline void xchrcat(char **dst, const char append, size_t *curr_len);
50 43
51/* variables to control behavior */ 44/* variables to control behavior */
45static char *ldpaths[256];
52static char scan_ldpath = 0; 46static char scan_ldpath = 0;
53static char scan_envpath = 0; 47static char scan_envpath = 0;
54static char scan_symlink = 1; 48static char scan_symlink = 1;
55static char dir_recurse = 0; 49static char dir_recurse = 0;
56static char dir_crossmount = 1; 50static char dir_crossmount = 1;
57static char show_pax = 0; 51static char show_pax = 0;
58static char show_stack = 0; 52static char show_phdr = 0;
59static char show_textrel = 0; 53static char show_textrel = 0;
60static char show_rpath = 0; 54static char show_rpath = 0;
61static char show_needed = 0; 55static char show_needed = 0;
62static char show_interp = 0; 56static char show_interp = 0;
57static char show_bind = 0;
58static char show_soname = 0;
59static char show_textrels = 0;
63static char show_banner = 1; 60static char show_banner = 1;
64static char be_quiet = 0; 61static char be_quiet = 0;
65static char be_verbose = 0; 62static char be_verbose = 0;
63static char be_wewy_wewy_quiet = 0;
66static char *find_sym = NULL, *versioned_symname = NULL; 64static char *find_sym = NULL, *versioned_symname = NULL;
65static char *find_lib = NULL;
67static char *out_format = NULL; 66static char *out_format = NULL;
68 67static char *search_path = NULL;
68static char gmatch = 0;
69 69
70 70
71/* 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}
72static void scanelf_file_pax(elfobj *elf, char *found_pax) 98static char *scanelf_file_pax(elfobj *elf, char *found_pax)
73{ 99{
74 char *paxflags; 100 static char ret[7];
101 unsigned long i, shown;
102
75 if (!show_pax) return; 103 if (!show_pax) return NULL;
76 104
77 paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 105 shown = 0;
78 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 106 memset(&ret, 0, sizeof(ret));
79 *found_pax = 1; 107
80 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 108 if (elf->phdr) {
81 }
82}
83static void scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
84{
85 int i;
86 if (!show_stack) return;
87#define SHOW_STACK(B) \ 109#define SHOW_PAX(B) \
88 if (elf->elf_class == ELFCLASS ## B) { \ 110 if (elf->elf_class == ELFCLASS ## B) { \
89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 111 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 112 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 113 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 114 if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \
94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
95 continue; \ 115 continue; \
96 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \ 116 if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \
117 continue; \
118 memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
97 *found_stack = 1; \ 119 *found_pax = 1; \
98 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \ 120 ++shown; \
99 *found_relro = 1; \ 121 break; \
100 printf("%s ", gnu_short_stack_flags(EGET(phdr[i].p_flags))); \
101 } \ 122 } \
102 } 123 }
103 SHOW_STACK(32) 124 SHOW_PAX(32)
104 SHOW_STACK(64) 125 SHOW_PAX(64)
105 if (!be_quiet && !*found_stack) printf("--- "); 126 }
106 if (!be_quiet && !*found_relro) printf("--- "); 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);
135 }
136 strncpy(ret, paxflags, sizeof(ret));
137 }
138
139 if (be_wewy_wewy_quiet || (be_quiet && !shown))
140 return NULL;
141 else
142 return ret;
107} 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}
108static void scanelf_file_textrel(elfobj *elf, char *found_textrel) 228static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
109{ 229{
110 int i; 230 static const char *ret = "TEXTREL";
111 if (!show_textrel) return; 231 unsigned long i;
232
233 if (!show_textrel && !show_textrels) return NULL;
234
235 if (elf->phdr) {
112#define SHOW_TEXTREL(B) \ 236#define SHOW_TEXTREL(B) \
113 if (elf->elf_class == ELFCLASS ## B) { \ 237 if (elf->elf_class == ELFCLASS ## B) { \
114 Elf ## B ## _Dyn *dyn; \ 238 Elf ## B ## _Dyn *dyn; \
115 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 239 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
116 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 240 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
241 Elf ## B ## _Off offset; \
117 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 242 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
118 if (phdr[i].p_type != PT_DYNAMIC) continue; \ 243 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
244 offset = EGET(phdr[i].p_offset); \
245 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
119 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 246 dyn = DYN ## B (elf->data + offset); \
120 while (EGET(dyn->d_tag) != DT_NULL) { \ 247 while (EGET(dyn->d_tag) != DT_NULL) { \
121 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)*/ \
122 *found_textrel = 1; \ 249 *found_textrel = 1; \
123 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 250 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
124 printf("TEXTREL "); \ 251 return (be_wewy_wewy_quiet ? NULL : ret); \
125 } \ 252 } \
126 ++dyn; \ 253 ++dyn; \
127 } \ 254 } \
128 } } 255 } }
129 SHOW_TEXTREL(32) 256 SHOW_TEXTREL(32)
130 SHOW_TEXTREL(64) 257 SHOW_TEXTREL(64)
131 if (!be_quiet && !*found_textrel) printf("------- "); 258 }
259
260 if (be_quiet || be_wewy_wewy_quiet)
261 return NULL;
262 else
263 return " - ";
132} 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}
133static void scanelf_file_rpath(elfobj *elf, char *found_rpath) 389static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
134{ 390{
135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 391 unsigned long i, s;
136 int i;
137 char *rpath, *runpath; 392 char *rpath, *runpath, **r;
138 void *strtbl_void; 393 void *strtbl_void;
139 394
140 if (!show_rpath) return; 395 if (!show_rpath) return;
141 396
142 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 397 strtbl_void = elf_findsecbyname(elf, ".dynstr");
143 rpath = runpath = NULL; 398 rpath = runpath = NULL;
144 399
145 if (strtbl_void) { 400 if (elf->phdr && strtbl_void) {
146#define SHOW_RPATH(B) \ 401#define SHOW_RPATH(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \ 402 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Dyn *dyn; \ 403 Elf ## B ## _Dyn *dyn; \
149 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 404 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
150 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 405 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
151 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 406 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
407 Elf ## B ## _Off offset; \
408 Elf ## B ## _Xword word; \
409 /* Scan all the program headers */ \
152 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 410 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
411 /* Just scan dynamic headers */ \
153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 412 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
413 offset = EGET(phdr[i].p_offset); \
414 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
415 /* Just scan dynamic RPATH/RUNPATH headers */ \
154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 416 dyn = DYN ## B (elf->data + offset); \
155 while (EGET(dyn->d_tag) != DT_NULL) { \ 417 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
156 if (EGET(dyn->d_tag) == DT_RPATH) { \ 418 if (word == DT_RPATH) { \
419 r = &rpath; \
420 } else if (word == DT_RUNPATH) { \
421 r = &runpath; \
422 } else { \
423 ++dyn; \
424 continue; \
425 } \
426 /* Verify the memory is somewhat sane */ \
157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 427 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
428 if (offset < (Elf ## B ## _Off)elf->len) { \
429 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
430 *r = (char*)(elf->data + offset); \
431 /* If quiet, don't output paths in ld.so.conf */ \
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)); \
443 for (s = 0; ldpaths[s]; ++s) { \
444 if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
445 *r = (end ? end + 1 : NULL); \
446 break; \
447 } \
448 } \
449 if (!*r || !ldpaths[s] || !end) \
450 start = NULL; \
451 else \
452 start = start + len + 1; \
453 } \
454 } \
158 *found_rpath = 1; \ 455 if (*r) *found_rpath = 1; \
159 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \
160 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
161 *found_rpath = 1; \
162 } \ 456 } \
163 ++dyn; \ 457 ++dyn; \
164 } \ 458 } \
165 } } 459 } }
166 SHOW_RPATH(32) 460 SHOW_RPATH(32)
167 SHOW_RPATH(64) 461 SHOW_RPATH(64)
168 } 462 }
463
464 if (be_wewy_wewy_quiet) return;
465
169 if (rpath && runpath) { 466 if (rpath && runpath) {
170 if (!strcmp(rpath, runpath)) 467 if (!strcmp(rpath, runpath)) {
171 printf("%-5s ", runpath); 468 xstrcat(ret, runpath, ret_len);
172 else { 469 } else {
173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); 470 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
174 printf("{%s,%s} ", rpath, runpath); 471 xchrcat(ret, '{', ret_len);
472 xstrcat(ret, rpath, ret_len);
473 xchrcat(ret, ',', ret_len);
474 xstrcat(ret, runpath, ret_len);
475 xchrcat(ret, '}', ret_len);
175 } 476 }
176 } else if (rpath || runpath) 477 } else if (rpath || runpath)
177 printf("%-5s ", (runpath ? runpath : rpath)); 478 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
178 else if (!be_quiet && !*found_rpath) 479 else if (!be_quiet)
179 printf(" - "); 480 xstrcat(ret, " - ", ret_len);
180} 481}
181static void scanelf_file_needed(elfobj *elf, char *found_needed) 482static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
182{ 483{
183 int i; 484 unsigned long i;
184 char *needed; 485 char *needed;
185 void *strtbl_void; 486 void *strtbl_void;
186 487
187 if (!show_needed) return; 488 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
188 489
189 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 490 strtbl_void = elf_findsecbyname(elf, ".dynstr");
190 491
191 if (strtbl_void) { 492 if (elf->phdr && strtbl_void) {
192#define SHOW_NEEDED(B) \ 493#define SHOW_NEEDED(B) \
193 if (elf->elf_class == ELFCLASS ## B) { \ 494 if (elf->elf_class == ELFCLASS ## B) { \
194 Elf ## B ## _Dyn *dyn; \ 495 Elf ## B ## _Dyn *dyn; \
195 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 496 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
196 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 497 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
197 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 498 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
499 Elf ## B ## _Off offset; \
198 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 500 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 501 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
502 offset = EGET(phdr[i].p_offset); \
503 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 504 dyn = DYN ## B (elf->data + offset); \
201 while (EGET(dyn->d_tag) != DT_NULL) { \ 505 while (EGET(dyn->d_tag) != DT_NULL) { \
202 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 506 if (EGET(dyn->d_tag) == DT_NEEDED) { \
203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 507 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 if (*found_needed) printf(","); \ 508 if (offset >= (Elf ## B ## _Off)elf->len) { \
205 printf("%s", needed); \ 509 ++dyn; \
510 continue; \
511 } \
512 needed = (char*)(elf->data + offset); \
513 if (op == 0) { \
514 if (!be_wewy_wewy_quiet) { \
515 if (*found_needed) xchrcat(ret, ',', ret_len); \
516 xstrcat(ret, needed, ret_len); \
517 } \
206 *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 } \
207 } \ 525 } \
208 ++dyn; \ 526 ++dyn; \
209 } \ 527 } \
210 } } 528 } }
211 SHOW_NEEDED(32) 529 SHOW_NEEDED(32)
212 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);
213 } 533 }
214 if (!be_quiet && !*found_needed) 534
215 printf(" - "); 535 return NULL;
216 else if (*found_needed)
217 printf(" ");
218} 536}
219static void scanelf_file_interp(elfobj *elf, char *found_interp) 537static char *scanelf_file_interp(elfobj *elf, char *found_interp)
220{ 538{
221 void *strtbl_void; 539 void *strtbl_void;
222 540
223 if (!show_interp) return; 541 if (!show_interp) return NULL;
224 542
225 strtbl_void = elf_findsecbyname(elf, ".interp"); 543 strtbl_void = elf_findsecbyname(elf, ".interp");
226 544
227 if (strtbl_void) { 545 if (strtbl_void) {
228#define SHOW_INTERP(B) \ 546#define SHOW_INTERP(B) \
229 if (elf->elf_class == ELFCLASS ## B) { \ 547 if (elf->elf_class == ELFCLASS ## B) { \
230 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 548 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
231 printf("%s ", elf->data + EGET(strtbl->sh_offset)); \
232 *found_interp = 1; \ 549 *found_interp = 1; \
550 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
233 } 551 }
234 SHOW_INTERP(32) 552 SHOW_INTERP(32)
235 SHOW_INTERP(64) 553 SHOW_INTERP(64)
236 } 554 }
237 if (!be_quiet && !*found_interp) 555 return NULL;
238 printf(" - ");
239 else if (*found_interp)
240 printf(" ");
241} 556}
557static char *scanelf_file_bind(elfobj *elf, char *found_bind)
558{
559 unsigned long i;
560 struct stat s;
561
562 if (!show_bind) return NULL;
563 if (!elf->phdr) return NULL;
564
565#define SHOW_BIND(B) \
566 if (elf->elf_class == ELFCLASS ## B) { \
567 Elf ## B ## _Dyn *dyn; \
568 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
569 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
570 Elf ## B ## _Off offset; \
571 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
572 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
573 offset = EGET(phdr[i].p_offset); \
574 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
575 dyn = DYN ## B (elf->data + offset); \
576 while (EGET(dyn->d_tag) != DT_NULL) { \
577 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
578 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
579 { \
580 if (be_quiet) return NULL; \
581 *found_bind = 1; \
582 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
583 } \
584 ++dyn; \
585 } \
586 } \
587 }
588 SHOW_BIND(32)
589 SHOW_BIND(64)
590
591 if (be_wewy_wewy_quiet) return NULL;
592
593 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
594 return NULL;
595 } else {
596 *found_bind = 1;
597 return (char *) "LAZY";
598 }
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}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 646static char *scanelf_file_sym(elfobj *elf, char *found_sym)
243{ 647{
244 int i; 648 unsigned long i;
245 void *symtab_void, *strtab_void; 649 void *symtab_void, *strtab_void;
246 650
247 if (!find_sym) return; 651 if (!find_sym) return NULL;
248 652
249 symtab_void = elf_findsecbyname(elf, ".symtab"); 653 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
250 strtab_void = elf_findsecbyname(elf, ".strtab");
251 654
252 if (symtab_void && strtab_void) { 655 if (symtab_void && strtab_void) {
253#define FIND_SYM(B) \ 656#define FIND_SYM(B) \
254 if (elf->elf_class == ELFCLASS ## B) { \ 657 if (elf->elf_class == ELFCLASS ## B) { \
255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 658 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 659 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
257 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)); \
258 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 661 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
259 char *symname; \ 662 char *symname; \
260 for (i = 0; i < cnt; ++i) { \ 663 for (i = 0; i < cnt; ++i) { \
261 if (sym->st_name) { \ 664 if (sym->st_name) { \
262 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)); \
263 if (*find_sym == '*') { \ 666 if (*find_sym == '*') { \
264 printf("%s(%s) %5lX %15s %s\n", \ 667 printf("%s(%s) %5lX %15s %s\n", \
265 ((*found_sym == 0) ? "\n\t" : "\t"), \ 668 ((*found_sym == 0) ? "\n\t" : "\t"), \
266 (char *)basename(filename), \ 669 elf->base_filename, \
267 (long)sym->st_size, \ 670 (long)sym->st_size, \
268 (char *)get_elfstttype(sym->st_info), \ 671 (char *)get_elfstttype(sym->st_info), \
269 symname); \ 672 symname); \
270 *found_sym = 1; \ 673 *found_sym = 1; \
271 } else if ((strcmp(find_sym, symname) == 0) || \ 674 } else if ((strcmp(find_sym, symname) == 0) || \
275 ++sym; \ 678 ++sym; \
276 } } 679 } }
277 FIND_SYM(32) 680 FIND_SYM(32)
278 FIND_SYM(64) 681 FIND_SYM(64)
279 } 682 }
280 if (*find_sym != '*') { 683
281 if (*found_sym) 684 if (be_wewy_wewy_quiet) return NULL;
282 printf(" %s ", find_sym); 685
686 if (*find_sym != '*' && *found_sym)
687 return find_sym;
283 else if (!be_quiet) 688 if (be_quiet)
284 printf(" - "); 689 return NULL;
285 } 690 else
691 return (char *)" - ";
286} 692}
287/* scan an elf file and show all the fun stuff */ 693/* scan an elf file and show all the fun stuff */
694#define prints(str) write(fileno(stdout), str, strlen(str))
288static void scanelf_file(const char *filename) 695static void scanelf_file(const char *filename)
289{ 696{
290 int i; 697 unsigned long i;
291 char found_pax, found_stack, found_relro, found_textrel, 698 char found_pax, found_phdr, found_relro, found_load, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym, 699 found_rpath, found_needed, found_interp, found_bind, found_soname,
293 found_file; 700 found_sym, found_lib, found_file, found_textrels;
294 elfobj *elf; 701 elfobj *elf;
295 struct stat st; 702 struct stat st;
703 static char *out_buffer = NULL;
704 static size_t out_len;
296 705
297 /* make sure 'filename' exists */ 706 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) { 707 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename); 708 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return; 709 return;
301 } 710 }
302 /* always handle regular files and handle symlinked files if no -y */ 711 /* always handle regular files and handle symlinked files if no -y */
303 if (!(S_ISREG(st.st_mode) || (S_ISLNK(st.st_mode) && scan_symlink))) { 712 if (S_ISLNK(st.st_mode)) {
713 if (!scan_symlink) return;
714 stat(filename, &st);
715 }
716 if (!S_ISREG(st.st_mode)) {
304 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 717 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
305 return; 718 return;
306 } 719 }
307 720
308 found_pax = found_stack = found_relro = found_textrel = \ 721 found_pax = found_phdr = found_relro = found_load = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \ 722 found_rpath = found_needed = found_interp = found_bind = found_soname = \
310 found_file = 0; 723 found_sym = found_lib = found_file = found_textrels = 0;
311 724
312 /* verify this is real ELF */ 725 /* verify this is real ELF */
313 if ((elf = readelf(filename)) == NULL) { 726 if ((elf = readelf(filename)) == NULL) {
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 727 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return; 728 return;
316 } 729 }
317 730
318 if (be_verbose > 1) 731 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename, 732 printf("%s: scanning file {%s,%s}\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class), 733 get_elfeitype(EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 734 get_elfeitype(EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose) 735 else if (be_verbose)
323 printf("%s: scanning file\n", filename); 736 printf("%s: scanning file\n", filename);
324 737
738 /* init output buffer */
739 if (!out_buffer) {
740 out_len = sizeof(char) * 80;
741 out_buffer = (char*)xmalloc(out_len);
742 }
743 *out_buffer = '\0';
744
325 /* show the header */ 745 /* show the header */
326 if (!be_quiet && show_banner) { 746 if (!be_quiet && show_banner) {
327 if (out_format) {
328 for (i=0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue;
330
331 switch (out_format[++i]) {
332 case '%': break;
333 case 'F': printf("FILE "); break;
334 case 'x': printf(" PAX "); break;
335 case 'e': printf("STK/REL "); break;
336 case 't': printf("TEXTREL "); break;
337 case 'r': printf("RPATH "); break;
338 case 'n': printf("NEEDED "); break;
339 case 'i': printf("INTERP "); break;
340 case 's': printf("SYM "); break;
341 }
342 }
343 } else {
344 printf(" TYPE ");
345 if (show_pax) printf(" PAX ");
346 if (show_stack) printf("STK/REL ");
347 if (show_textrel) printf("TEXTREL ");
348 if (show_rpath) printf("RPATH ");
349 if (show_needed) printf("NEEDED ");
350 if (show_interp) printf("INTERP ");
351 if (find_sym) printf("SYM ");
352 }
353 if (!found_file) printf(" FILE");
354 printf("\n");
355 show_banner = 0;
356 }
357
358 /* dump all the good stuff */
359 if (!be_quiet && !out_format)
360 printf("%-7s ", get_elfetype(elf));
361
362 if (out_format) {
363 for (i=0; out_format[i]; ++i) { 747 for (i = 0; out_format[i]; ++i) {
364 if (out_format[i] != '%') { 748 if (!IS_MODIFIER(out_format[i])) continue;
365 printf("%c", out_format[i]);
366 continue;
367 }
368 749
369 switch (out_format[++i]) { 750 switch (out_format[++i]) {
751 case '%': break;
752 case '#': break;
753 case 'F':
754 case 'p':
755 case 'f': prints("FILE "); found_file = 1; break;
756 case 'o': prints(" TYPE "); break;
757 case 'x': prints(" PAX "); break;
758 case 'e': prints("STK/REL/PTL "); break;
759 case 't': prints("TEXTREL "); break;
760 case 'r': prints("RPATH "); break;
761 case 'n': prints("NEEDED "); break;
762 case 'i': prints("INTERP "); break;
763 case 'b': prints("BIND "); break;
764 case 'S': prints("SONAME "); break;
370 case '%': printf("%%"); break; 765 case 's': prints("SYM "); break;
371 case 'F': found_file = 1; printf("%s ", filename); break; 766 case 'N': prints("LIB "); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break; 767 case 'T': prints("TEXTRELS "); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break; 768 default: warnf("'%c' has no title ?", out_format[i]);
374 case 't': scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break;
379 } 769 }
380 } 770 }
381 } else { 771 if (!found_file) prints("FILE ");
382 scanelf_file_pax(elf, &found_pax);
383 scanelf_file_stack(elf, &found_stack, &found_relro);
384 scanelf_file_textrel(elf, &found_textrel);
385 scanelf_file_rpath(elf, &found_rpath);
386 scanelf_file_needed(elf, &found_needed);
387 scanelf_file_interp(elf, &found_interp);
388 scanelf_file_sym(elf, &found_sym, filename);
389 }
390
391 if (!found_file) {
392 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym)
394 puts(filename);
395 } else {
396 printf("\n"); 772 prints("\n");
773 found_file = 0;
774 show_banner = 0;
775 }
776
777 /* dump all the good stuff */
778 for (i = 0; out_format[i]; ++i) {
779 const char *out;
780 const char *tmp;
781
782 /* make sure we trim leading spaces in quiet mode */
783 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
784 *out_buffer = '\0';
785
786 if (!IS_MODIFIER(out_format[i])) {
787 xchrcat(&out_buffer, out_format[i], &out_len);
788 continue;
789 }
790
791 out = NULL;
792 be_wewy_wewy_quiet = (out_format[i] == '#');
793 switch (out_format[++i]) {
794 case '%':
795 case '#':
796 xchrcat(&out_buffer, out_format[i], &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;
823 case 'o': out = get_elfetype(elf); break;
824 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
825 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); 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;
828 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
829 case 'n':
830 case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
831 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
832 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
833 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
834 case 's': out = scanelf_file_sym(elf, &found_sym); break;
835 default: warnf("'%c' has no scan code?", out_format[i]);
836 }
837 if (out) xstrcat(&out_buffer, out, &out_len);
838 }
839
840#define FOUND_SOMETHING() \
841 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
842 found_rpath || found_needed || found_interp || found_bind || \
843 found_soname || found_sym || found_lib || found_textrels)
844
845 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
846 xchrcat(&out_buffer, ' ', &out_len);
847 xstrcat(&out_buffer, filename, &out_len);
848 }
849 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
850 puts(out_buffer);
851 fflush(stdout);
397 } 852 }
398 853
399 unreadelf(elf); 854 unreadelf(elf);
400} 855}
401 856
431 while ((dentry = readdir(dir))) { 886 while ((dentry = readdir(dir))) {
432 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 887 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
433 continue; 888 continue;
434 len = (pathlen + 1 + strlen(dentry->d_name) + 1); 889 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
435 if (len >= sizeof(buf)) { 890 if (len >= sizeof(buf)) {
436 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));
437 continue; 893 continue;
438 } 894 }
439 sprintf(buf, "%s/%s", path, dentry->d_name); 895 sprintf(buf, "%s/%s", path, dentry->d_name);
440 if (lstat(buf, &st) != -1) { 896 if (lstat(buf, &st) != -1) {
441 if (S_ISREG(st.st_mode)) 897 if (S_ISREG(st.st_mode))
447 } 903 }
448 } 904 }
449 closedir(dir); 905 closedir(dir);
450} 906}
451 907
908static int scanelf_from_file(char *filename)
909{
910 FILE *fp = NULL;
911 char *p;
912 char path[_POSIX_PATH_MAX];
913
914 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
915 fp = stdin;
916 else if ((fp = fopen(filename, "r")) == NULL)
917 return 1;
918
919 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
920 if ((p = strchr(path, '\n')) != NULL)
921 *p = 0;
922 search_path = path;
923 scanelf_dir(path);
924 }
925 if (fp != stdin)
926 fclose(fp);
927 return 0;
928}
929
930static void load_ld_so_conf()
931{
932 FILE *fp = NULL;
933 char *p;
934 char path[_POSIX_PATH_MAX];
935 int i = 0;
936
937 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
938 return;
939
940 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
941 if (*path != '/')
942 continue;
943
944 if ((p = strrchr(path, '\r')) != NULL)
945 *p = 0;
946 if ((p = strchr(path, '\n')) != NULL)
947 *p = 0;
948
949 ldpaths[i++] = xstrdup(path);
950
951 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
952 break;
953 }
954 ldpaths[i] = NULL;
955
956 fclose(fp);
957}
958
452/* scan /etc/ld.so.conf for paths */ 959/* scan /etc/ld.so.conf for paths */
453static void scanelf_ldpath() 960static void scanelf_ldpath()
454{ 961{
455 char scan_l, scan_ul, scan_ull; 962 char scan_l, scan_ul, scan_ull;
456 char *path, *p; 963 int i = 0;
457 FILE *fp;
458 964
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 965 if (!ldpaths[0])
460 err("Unable to open ld.so.conf: %s", strerror(errno)); 966 err("Unable to load any paths from ld.so.conf");
461 967
462 scan_l = scan_ul = scan_ull = 0; 968 scan_l = scan_ul = scan_ull = 0;
463 969
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 970 while (ldpaths[i]) {
465 warn("Can not malloc() memory for ldpath scanning");
466 return;
467 }
468 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL)
469 if (*path == '/') {
470 if ((p = strrchr(path, '\r')) != NULL)
471 *p = 0;
472 if ((p = strrchr(path, '\n')) != NULL)
473 *p = 0;
474 if (!scan_l && !strcmp(path, "/lib")) scan_l = 1; 971 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 972 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 973 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
477 scanelf_dir(path); 974 scanelf_dir(ldpaths[i]);
975 ++i;
478 } 976 }
479 free(path);
480 fclose(fp);
481 977
482 if (!scan_l) scanelf_dir("/lib"); 978 if (!scan_l) scanelf_dir("/lib");
483 if (!scan_ul) scanelf_dir("/usr/lib"); 979 if (!scan_ul) scanelf_dir("/usr/lib");
484 if (!scan_ull) scanelf_dir("/usr/local/lib"); 980 if (!scan_ull) scanelf_dir("/usr/local/lib");
485} 981}
490 char *path, *p; 986 char *path, *p;
491 987
492 path = getenv("PATH"); 988 path = getenv("PATH");
493 if (!path) 989 if (!path)
494 err("PATH is not set in your env !"); 990 err("PATH is not set in your env !");
495 991 path = xstrdup(path);
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498 992
499 while ((p = strrchr(path, ':')) != NULL) { 993 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1); 994 scanelf_dir(p + 1);
501 *p = 0; 995 *p = 0;
502 } 996 }
505} 999}
506 1000
507 1001
508 1002
509/* usage / invocation handling functions */ 1003/* usage / invocation handling functions */
510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV" 1004#define PARSE_FLAGS "plRmyxetrnibSs:gN:TaqvF:f:o:BhV"
511#define a_argument required_argument 1005#define a_argument required_argument
512static struct option const long_opts[] = { 1006static struct option const long_opts[] = {
513 {"path", no_argument, NULL, 'p'}, 1007 {"path", no_argument, NULL, 'p'},
514 {"ldpath", no_argument, NULL, 'l'}, 1008 {"ldpath", no_argument, NULL, 'l'},
515 {"recursive", no_argument, NULL, 'R'}, 1009 {"recursive", no_argument, NULL, 'R'},
519 {"header", no_argument, NULL, 'e'}, 1013 {"header", no_argument, NULL, 'e'},
520 {"textrel", no_argument, NULL, 't'}, 1014 {"textrel", no_argument, NULL, 't'},
521 {"rpath", no_argument, NULL, 'r'}, 1015 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'}, 1016 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'}, 1017 {"interp", no_argument, NULL, 'i'},
1018 {"bind", no_argument, NULL, 'b'},
1019 {"soname", no_argument, NULL, 'S'},
524 {"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'},
525 {"all", no_argument, NULL, 'a'}, 1024 {"all", no_argument, NULL, 'a'},
526 {"quiet", no_argument, NULL, 'q'}, 1025 {"quiet", no_argument, NULL, 'q'},
527 {"verbose", no_argument, NULL, 'v'}, 1026 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'}, 1027 {"format", a_argument, NULL, 'F'},
1028 {"from", a_argument, NULL, 'f'},
529 {"file", a_argument, NULL, 'o'}, 1029 {"file", a_argument, NULL, 'o'},
530 {"nobanner", no_argument, NULL, 'B'}, 1030 {"nobanner", no_argument, NULL, 'B'},
531 {"help", no_argument, NULL, 'h'}, 1031 {"help", no_argument, NULL, 'h'},
532 {"version", no_argument, NULL, 'V'}, 1032 {"version", no_argument, NULL, 'V'},
533 {NULL, no_argument, NULL, 0x0} 1033 {NULL, no_argument, NULL, 0x0}
534}; 1034};
1035
535static char *opts_help[] = { 1036static const char *opts_help[] = {
536 "Scan all directories in PATH environment", 1037 "Scan all directories in PATH environment",
537 "Scan all directories in /etc/ld.so.conf", 1038 "Scan all directories in /etc/ld.so.conf",
538 "Scan directories recursively", 1039 "Scan directories recursively",
539 "Don't recursively cross mount points", 1040 "Don't recursively cross mount points",
540 "Don't scan symlinks\n", 1041 "Don't scan symlinks\n",
541 "Print PaX markings", 1042 "Print PaX markings",
542 "Print GNU_STACK markings", 1043 "Print GNU_STACK/PT_LOAD markings",
543 "Print TEXTREL information", 1044 "Print TEXTREL information",
544 "Print RPATH information", 1045 "Print RPATH information",
545 "Print NEEDED information", 1046 "Print NEEDED information",
546 "Print INTERP information", 1047 "Print INTERP information",
1048 "Print BIND information",
1049 "Print SONAME information",
547 "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",
548 "Print all scanned info (-x -e -t -r)\n", 1054 "Print all scanned info (-x -e -t -r -b)\n",
549 "Only output 'bad' things", 1055 "Only output 'bad' things",
550 "Be verbose (can be specified more than once)", 1056 "Be verbose (can be specified more than once)",
551 "Use specified format for output", 1057 "Use specified format for output",
1058 "Read input stream from a filename",
552 "Write output stream to a filename", 1059 "Write output stream to a filename",
553 "Don't display the header", 1060 "Don't display the header",
554 "Print this help and exit", 1061 "Print this help and exit",
555 "Print version and exit", 1062 "Print version and exit",
556 NULL 1063 NULL
557}; 1064};
558 1065
559/* display usage and exit */ 1066/* display usage and exit */
560static void usage(int status) 1067static void usage(int status)
561{ 1068{
562 int i; 1069 unsigned long i;
563 printf(" Scan ELF binaries for stuff\n\n" 1070 printf("* Scan ELF binaries for stuff\n\n"
564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 1071 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
565 printf("Options: -[%s]\n", PARSE_FLAGS); 1072 printf("Options: -[%s]\n", PARSE_FLAGS);
566 for (i = 0; long_opts[i].name; ++i) 1073 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument) 1074 if (long_opts[i].has_arg == no_argument)
568 printf(" -%c, --%-13s %s\n", long_opts[i].val, 1075 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
569 long_opts[i].name, opts_help[i]); 1076 long_opts[i].name, opts_help[i]);
570 else 1077 else
571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 1078 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val,
572 long_opts[i].name, opts_help[i]); 1079 long_opts[i].name, opts_help[i]);
1080
1081 if (status != EXIT_SUCCESS)
1082 exit(status);
1083
1084 puts("\nThe format modifiers for the -F option are:");
1085 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1086 puts(" t TEXTREL \tr RPATH \tn NEEDED");
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)");
1093
573 exit(status); 1094 exit(status);
574} 1095}
575 1096
576/* parse command line arguments and preform needed actions */ 1097/* parse command line arguments and preform needed actions */
577static void parseargs(int argc, char *argv[]) 1098static void parseargs(int argc, char *argv[])
578{ 1099{
579 int flag; 1100 int i;
1101 char *from_file = NULL;
580 1102
581 opterr = 0; 1103 opterr = 0;
582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 1104 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
583 switch (flag) { 1105 switch (i) {
584 1106
585 case 'V': 1107 case 'V':
586 printf("%s compiled %s\n%s\n" 1108 printf("pax-utils-%s: %s compiled %s\n%s\n"
587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 1109 "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
588 __FILE__, __DATE__, rcsid, argv0); 1110 VERSION, __FILE__, __DATE__, rcsid, argv0);
589 exit(EXIT_SUCCESS); 1111 exit(EXIT_SUCCESS);
590 break; 1112 break;
591 case 'h': usage(EXIT_SUCCESS); break; 1113 case 'h': usage(EXIT_SUCCESS); break;
592 1114 case 'f':
1115 if (from_file) err("Don't specify -f twice");
1116 from_file = xstrdup(optarg);
1117 break;
593 case 'o': { 1118 case 'o': {
594 FILE *fp = NULL; 1119 FILE *fp = NULL;
595 fp = freopen(optarg, "w", stdout); 1120 if ((fp = freopen(optarg, "w", stdout)) == NULL)
596 if (fp == NULL)
597 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 1121 err("Could not open output stream '%s': %s", optarg, strerror(errno));
598 stdout = fp; 1122 SET_STDOUT(fp);
599 break; 1123 break;
600 } 1124 }
601 1125
602 case 's': { 1126 case 's': {
603 size_t len; 1127 size_t len;
1128 if (find_sym) err("Don't specify -s twice");
604 find_sym = strdup(optarg); 1129 find_sym = xstrdup(optarg);
605 if (!find_sym) {
606 warnf("Could not malloc() mem for sym scan");
607 find_sym = NULL;
608 break;
609 }
610 len = strlen(find_sym) + 1; 1130 len = strlen(find_sym) + 1;
611 versioned_symname = (char *)malloc(sizeof(char) * (len+1)); 1131 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
612 if (!versioned_symname) {
613 free(find_sym);
614 find_sym = NULL;
615 warnf("Could not malloc() mem for sym scan");
616 break;
617 }
618 sprintf(versioned_symname, "%s@", find_sym); 1132 sprintf(versioned_symname, "%s@", find_sym);
619 break; 1133 break;
620 } 1134 }
621
622 case 'F': { 1135 case 'N': {
623 out_format = strdup(optarg); 1136 if (find_lib) err("Don't specify -N twice");
624 if (!out_format) 1137 find_lib = xstrdup(optarg);
625 err("Could not malloc() mem for output format");
626 break; 1138 break;
627 } 1139 }
628 1140
1141 case 'F': {
1142 if (out_format) err("Don't specify -F twice");
1143 out_format = xstrdup(optarg);
1144 break;
1145 }
1146
1147 case 'g': gmatch = 1;
629 case 'y': scan_symlink = 0; break; 1148 case 'y': scan_symlink = 0; break;
630 case 'B': show_banner = 0; break; 1149 case 'B': show_banner = 0; break;
631 case 'l': scan_ldpath = 1; break; 1150 case 'l': scan_ldpath = 1; break;
632 case 'p': scan_envpath = 1; break; 1151 case 'p': scan_envpath = 1; break;
633 case 'R': dir_recurse = 1; break; 1152 case 'R': dir_recurse = 1; break;
634 case 'm': dir_crossmount = 0; break; 1153 case 'm': dir_crossmount = 0; break;
635 case 'x': show_pax = 1; break; 1154 case 'x': show_pax = 1; break;
636 case 'e': show_stack = 1; break; 1155 case 'e': show_phdr = 1; break;
637 case 't': show_textrel = 1; break; 1156 case 't': show_textrel = 1; break;
638 case 'r': show_rpath = 1; break; 1157 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break; 1158 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break; 1159 case 'i': show_interp = 1; break;
1160 case 'b': show_bind = 1; break;
1161 case 'S': show_soname = 1; break;
1162 case 'T': show_textrels = 1; break;
641 case 'q': be_quiet = 1; break; 1163 case 'q': be_quiet = 1; break;
642 case 'v': be_verbose = (be_verbose % 20) + 1; break; 1164 case 'v': be_verbose = (be_verbose % 20) + 1; break;
643 case 'a': show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 1; break; 1165 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
644 1166
645 case ':': 1167 case ':':
646 warn("Option missing parameter\n"); 1168 err("Option missing parameter\n");
647 usage(EXIT_FAILURE);
648 break;
649 case '?': 1169 case '?':
650 warn("Unknown option\n"); 1170 err("Unknown option\n");
651 usage(EXIT_FAILURE);
652 break;
653 default: 1171 default:
654 err("Unhandled option '%c'", flag); 1172 err("Unhandled option '%c'", i);
655 break;
656 } 1173 }
657 } 1174 }
658
659 if (be_quiet && be_verbose)
660 err("You can be quiet or you can be verbose, not both, stupid");
661 1175
662 /* let the format option override all other options */ 1176 /* let the format option override all other options */
663 if (out_format) { 1177 if (out_format) {
664 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;
665 for (flag=0; out_format[flag]; ++flag) { 1181 for (i = 0; out_format[i]; ++i) {
666 if (out_format[flag] != '%') continue; 1182 if (!IS_MODIFIER(out_format[i])) continue;
667 1183
668 switch (out_format[++flag]) { 1184 switch (out_format[++i]) {
669 case '%': break; 1185 case '%': break;
1186 case '#': break;
670 case 'F': break; 1187 case 'F': break;
1188 case 'p': break;
1189 case 'f': break;
671 case 's': break; 1190 case 's': break;
1191 case 'N': break;
1192 case 'o': break;
672 case 'x': show_pax = 1; break; 1193 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break; 1194 case 'e': show_phdr = 1; break;
674 case 't': show_textrel = 1; break; 1195 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break; 1196 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break; 1197 case 'n': show_needed = 1; break;
677 case 'i': show_interp = 1; break; 1198 case 'i': show_interp = 1; break;
1199 case 'b': show_bind = 1; break;
1200 case 'S': show_soname = 1; break;
1201 case 'T': show_textrels = 1; break;
678 default: 1202 default:
679 err("Invalid format specifier '%c' (byte %i)", 1203 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1); 1204 out_format[i], i+1);
681 } 1205 }
682 } 1206 }
1207
1208 /* construct our default format */
1209 } else {
1210 size_t fmt_len = 30;
1211 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
1212 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1213 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1214 if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1215 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1216 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1217 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1218 if (show_interp) xstrcat(&out_format, "%i ", &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);
1222 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1223 if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1224 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
683 } 1225 }
1226 if (be_verbose > 2) printf("Format: %s\n", out_format);
684 1227
685 /* now lets actually do the scanning */ 1228 /* now lets actually do the scanning */
1229 if (scan_ldpath || (show_rpath && be_quiet))
1230 load_ld_so_conf();
686 if (scan_ldpath) scanelf_ldpath(); 1231 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath(); 1232 if (scan_envpath) scanelf_envpath();
1233 if (from_file) {
1234 scanelf_from_file(from_file);
1235 free(from_file);
1236 from_file = *argv;
1237 }
688 if (optind == argc && !scan_ldpath && !scan_envpath) 1238 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
689 err("Nothing to scan !?"); 1239 err("Nothing to scan !?");
690 while (optind < argc) 1240 while (optind < argc) {
691 scanelf_dir(argv[optind++]); 1241 search_path = argv[optind++];
1242 scanelf_dir(search_path);
1243 }
692 1244
693 /* clean up */ 1245 /* clean up */
694 if (find_sym) { 1246 if (find_sym) {
695 free(find_sym); 1247 free(find_sym);
696 free(versioned_symname); 1248 free(versioned_symname);
697 } 1249 }
1250 if (find_lib) free(find_lib);
698 if (out_format) free(out_format); 1251 if (out_format) free(out_format);
1252 for (i = 0; ldpaths[i]; ++i)
1253 free(ldpaths[i]);
1254}
1255
1256
1257
1258/* utility funcs */
1259static char *xstrdup(const char *s)
1260{
1261 char *ret = strdup(s);
1262 if (!ret) err("Could not strdup(): %s", strerror(errno));
1263 return ret;
1264}
1265
1266static void *xmalloc(size_t size)
1267{
1268 void *ret = malloc(size);
1269 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1270 return ret;
1271}
1272
1273static void xstrcat(char **dst, const char *src, size_t *curr_len)
1274{
1275 size_t new_len;
1276
1277 new_len = strlen(*dst) + strlen(src);
1278 if (*curr_len <= new_len) {
1279 *curr_len = new_len + (*curr_len / 2);
1280 *dst = realloc(*dst, *curr_len);
1281 if (!*dst)
1282 err("could not realloc %li bytes", (unsigned long)*curr_len);
1283 }
1284
1285 strcat(*dst, src);
1286}
1287
1288static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1289{
1290 static char my_app[2];
1291 my_app[0] = append;
1292 my_app[1] = '\0';
1293 xstrcat(dst, my_app, curr_len);
699} 1294}
700 1295
701 1296
702 1297
703int main(int argc, char *argv[]) 1298int main(int argc, char *argv[])
704{ 1299{
705 if (argc < 2) 1300 if (argc < 2)
706 usage(EXIT_FAILURE); 1301 usage(EXIT_FAILURE);
707 parseargs(argc, argv); 1302 parseargs(argc, argv);
708 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
709 return EXIT_SUCCESS; 1307 return EXIT_SUCCESS;
710} 1308}

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