/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.40 Revision 1.56
1/* 1/*
2 * Copyright 2003 Ned Ludd <solar@gentoo.org> 2 * Copyright 2003 Ned Ludd <solar@gentoo.org>
3 * Copyright 1999-2005 Gentoo Foundation 3 * Copyright 1999-2005 Gentoo Foundation
4 * Distributed under the terms of the GNU General Public License v2 4 * 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 $ 5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.56 2005/05/21 00:34:07 vapier Exp $
6 * 6 *
7 ******************************************************************** 7 ********************************************************************
8 * This program is free software; you can redistribute it and/or 8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as 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 10 * published by the Free Software Foundation; either version 2 of the
33#include <getopt.h> 33#include <getopt.h>
34#include <assert.h> 34#include <assert.h>
35 35
36#include "paxelf.h" 36#include "paxelf.h"
37 37
38static const char *rcsid = "$Id: scanelf.c,v 1.40 2005/04/21 00:13:03 solar Exp $"; 38static const char *rcsid = "$Id: scanelf.c,v 1.56 2005/05/21 00:34:07 vapier Exp $";
39#define argv0 "scanelf" 39#define argv0 "scanelf"
40 40
41 41
42 42
43/* prototypes */ 43/* prototypes */
45static void scanelf_dir(const char *path); 45static void scanelf_dir(const char *path);
46static void scanelf_ldpath(); 46static void scanelf_ldpath();
47static void scanelf_envpath(); 47static void scanelf_envpath();
48static void usage(int status); 48static void usage(int status);
49static void parseargs(int argc, char *argv[]); 49static void parseargs(int argc, char *argv[]);
50static char *xstrdup(char *s);
51static void *xmalloc(size_t size);
52static void xstrcat(char **dst, const char *src, size_t *curr_len);
53static inline void xchrcat(char **dst, const char append, size_t *curr_len);
50 54
51/* variables to control behavior */ 55/* variables to control behavior */
56static char *ldpaths[256];
52static char scan_ldpath = 0; 57static char scan_ldpath = 0;
53static char scan_envpath = 0; 58static char scan_envpath = 0;
54static char scan_symlink = 1; 59static char scan_symlink = 1;
55static char dir_recurse = 0; 60static char dir_recurse = 0;
56static char dir_crossmount = 1; 61static char dir_crossmount = 1;
58static char show_stack = 0; 63static char show_stack = 0;
59static char show_textrel = 0; 64static char show_textrel = 0;
60static char show_rpath = 0; 65static char show_rpath = 0;
61static char show_needed = 0; 66static char show_needed = 0;
62static char show_interp = 0; 67static char show_interp = 0;
68static char show_bind = 0;
63static char show_banner = 1; 69static char show_banner = 1;
64static char be_quiet = 0; 70static char be_quiet = 0;
65static char be_verbose = 0; 71static char be_verbose = 0;
66static char *find_sym = NULL, *versioned_symname = NULL; 72static char *find_sym = NULL, *versioned_symname = NULL;
67static char *out_format = NULL; 73static char *out_format = NULL;
68 74
69 75
70 76
71/* sub-funcs for scanelf_file() */ 77/* sub-funcs for scanelf_file() */
72static void scanelf_file_pax(elfobj *elf, char *found_pax) 78static char *scanelf_file_pax(elfobj *elf, char *found_pax)
73{ 79{
74 char *paxflags; 80 static char *paxflags;
81
75 if (!show_pax) return; 82 if (!show_pax) return NULL;
76 83
77 paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 84 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
78 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 85 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
79 *found_pax = 1; 86 *found_pax = 1;
80 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 87 return paxflags;
81 } 88 }
89
90 return NULL;
82} 91}
83static void scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro) 92static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
84{ 93{
85 int i; 94 static char ret[8];
95 char *found;
96 unsigned long i, off, shown;
97
86 if (!show_stack) return; 98 if (!show_stack) return NULL;
99
100 shown = 0;
101 strcpy(ret, "--- ---");
102
103 if (elf->phdr) {
87#define SHOW_STACK(B) \ 104#define SHOW_STACK(B) \
88 if (elf->elf_class == ELFCLASS ## B) { \ 105 if (elf->elf_class == ELFCLASS ## B) { \
89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 106 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 107 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 108 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 109 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
110 found = found_stack; \
111 off = 0; \
93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 112 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
113 found = found_relro; \
114 off = 4; \
115 } else \
116 continue; \
94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 117 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
95 continue; \ 118 continue; \
96 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \
97 *found_stack = 1; \
98 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \
99 *found_relro = 1; \
100 printf("%s ", gnu_short_stack_flags(EGET(phdr[i].p_flags))); \ 119 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
120 *found = 1; \
121 ++shown; \
101 } \ 122 } \
102 } 123 }
103 SHOW_STACK(32) 124 SHOW_STACK(32)
104 SHOW_STACK(64) 125 SHOW_STACK(64)
105 if (!be_quiet && !*found_stack) printf("--- "); 126 }
106 if (!be_quiet && !*found_relro) printf("--- "); 127
128 if (be_quiet && !shown)
129 return NULL;
130 else
131 return ret;
107} 132}
108static void scanelf_file_textrel(elfobj *elf, char *found_textrel) 133static char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
109{ 134{
110 int i; 135 static char *ret = "TEXTREL";
136 unsigned long i;
137
111 if (!show_textrel) return; 138 if (!show_textrel) return NULL;
139
140 if (elf->phdr) {
112#define SHOW_TEXTREL(B) \ 141#define SHOW_TEXTREL(B) \
113 if (elf->elf_class == ELFCLASS ## B) { \ 142 if (elf->elf_class == ELFCLASS ## B) { \
114 Elf ## B ## _Dyn *dyn; \ 143 Elf ## B ## _Dyn *dyn; \
115 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 144 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
116 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 145 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
146 Elf ## B ## _Off offset; \
117 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 147 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
118 if (phdr[i].p_type != PT_DYNAMIC) continue; \ 148 if (phdr[i].p_type != PT_DYNAMIC) continue; \
149 offset = EGET(phdr[i].p_offset); \
150 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
119 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 151 dyn = DYN ## B (elf->data + offset); \
120 while (EGET(dyn->d_tag) != DT_NULL) { \ 152 while (EGET(dyn->d_tag) != DT_NULL) { \
121 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 153 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
122 *found_textrel = 1; \ 154 *found_textrel = 1; \
123 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 155 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
124 printf("TEXTREL "); \ 156 return ret; \
125 } \ 157 } \
126 ++dyn; \ 158 ++dyn; \
127 } \ 159 } \
128 } } 160 } }
129 SHOW_TEXTREL(32) 161 SHOW_TEXTREL(32)
130 SHOW_TEXTREL(64) 162 SHOW_TEXTREL(64)
131 if (!be_quiet && !*found_textrel) printf("------- "); 163 }
164
165 if (be_quiet)
166 return NULL;
167 else
168 return " - ";
132} 169}
133static void scanelf_file_rpath(elfobj *elf, char *found_rpath) 170static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
134{ 171{
135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 172 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
136 int i; 173 unsigned long i, s;
137 char *rpath, *runpath; 174 char *rpath, *runpath, **r;
138 void *strtbl_void; 175 void *strtbl_void;
139 176
140 if (!show_rpath) return; 177 if (!show_rpath) return;
141 178
142 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 179 strtbl_void = elf_findsecbyname(elf, ".dynstr");
143 rpath = runpath = NULL; 180 rpath = runpath = NULL;
144 181
145 if (strtbl_void) { 182 if (elf->phdr && strtbl_void) {
146#define SHOW_RPATH(B) \ 183#define SHOW_RPATH(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \ 184 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Dyn *dyn; \ 185 Elf ## B ## _Dyn *dyn; \
149 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 186 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
150 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 187 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
151 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 188 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
189 Elf ## B ## _Off offset; \
190 Elf ## B ## _Sxword word; \
191 /* Scan all the program headers */ \
152 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 192 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
193 /* Just scan dynamic headers */ \
153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 194 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
195 offset = EGET(phdr[i].p_offset); \
196 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
197 /* Just scan dynamic RPATH/RUNPATH headers */ \
154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 198 dyn = DYN ## B (elf->data + offset); \
155 while (EGET(dyn->d_tag) != DT_NULL) { \ 199 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
156 if (EGET(dyn->d_tag) == DT_RPATH) { \ 200 if (word == DT_RPATH) { \
201 r = &rpath; \
202 } else if (word == DT_RUNPATH) { \
203 r = &runpath; \
204 } else { \
205 ++dyn; \
206 continue; \
207 } \
208 /* Verify the memory is somewhat sane */ \
157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 209 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
210 if (offset < elf->len) { \
211 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
212 *r = (char*)(elf->data + offset); \
213 /* If quiet, don't output paths in ld.so.conf */ \
214 if (be_quiet) \
215 for (s = 0; ldpaths[s]; ++s) \
216 if (!strcmp(ldpaths[s], *r)) { \
217 *r = NULL; \
218 break; \
219 } \
158 *found_rpath = 1; \ 220 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 } \ 221 } \
163 ++dyn; \ 222 ++dyn; \
164 } \ 223 } \
165 } } 224 } }
166 SHOW_RPATH(32) 225 SHOW_RPATH(32)
167 SHOW_RPATH(64) 226 SHOW_RPATH(64)
168 } 227 }
228
169 if (rpath && runpath) { 229 if (rpath && runpath) {
170 if (!strcmp(rpath, runpath)) 230 if (!strcmp(rpath, runpath)) {
171 printf("%-5s ", runpath); 231 xstrcat(ret, runpath, ret_len);
172 else { 232 } else {
173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); 233 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
174 printf("{%s,%s} ", rpath, runpath); 234 xchrcat(ret, '{', ret_len);
235 xstrcat(ret, rpath, ret_len);
236 xchrcat(ret, ',', ret_len);
237 xstrcat(ret, runpath, ret_len);
238 xchrcat(ret, '}', ret_len);
175 } 239 }
176 } else if (rpath || runpath) 240 } else if (rpath || runpath)
177 printf("%-5s ", (runpath ? runpath : rpath)); 241 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
178 else if (!be_quiet && !*found_rpath) 242 else if (!be_quiet)
179 printf(" - "); 243 xstrcat(ret, " - ", ret_len);
180} 244}
181static void scanelf_file_needed(elfobj *elf, char *found_needed) 245static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len)
182{ 246{
183 int i; 247 unsigned long i;
184 char *needed; 248 char *needed;
185 void *strtbl_void; 249 void *strtbl_void;
186 250
187 if (!show_needed) return; 251 if (!show_needed) return;
188 252
189 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 253 strtbl_void = elf_findsecbyname(elf, ".dynstr");
190 254
191 if (strtbl_void) { 255 if (elf->phdr && strtbl_void) {
192#define SHOW_NEEDED(B) \ 256#define SHOW_NEEDED(B) \
193 if (elf->elf_class == ELFCLASS ## B) { \ 257 if (elf->elf_class == ELFCLASS ## B) { \
194 Elf ## B ## _Dyn *dyn; \ 258 Elf ## B ## _Dyn *dyn; \
195 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 259 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
196 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 260 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
197 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 261 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
262 Elf ## B ## _Off offset; \
198 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 263 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 264 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
265 offset = EGET(phdr[i].p_offset); \
266 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 267 dyn = DYN ## B (elf->data + offset); \
201 while (EGET(dyn->d_tag) != DT_NULL) { \ 268 while (EGET(dyn->d_tag) != DT_NULL) { \
202 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 269 if (EGET(dyn->d_tag) == DT_NEEDED) { \
203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 270 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 if (*found_needed) printf(","); \ 271 if (offset >= elf->len) { \
205 printf("%s", needed); \ 272 ++dyn; \
273 continue; \
274 } \
275 needed = (char*)(elf->data + offset); \
276 if (*found_needed) xchrcat(ret, ',', ret_len); \
277 xstrcat(ret, needed, ret_len); \
206 *found_needed = 1; \ 278 *found_needed = 1; \
207 } \ 279 } \
208 ++dyn; \ 280 ++dyn; \
209 } \ 281 } \
210 } } 282 } }
211 SHOW_NEEDED(32) 283 SHOW_NEEDED(32)
212 SHOW_NEEDED(64) 284 SHOW_NEEDED(64)
213 } 285 }
214 if (!be_quiet && !*found_needed)
215 printf(" - ");
216 else if (*found_needed)
217 printf(" ");
218} 286}
219static void scanelf_file_interp(elfobj *elf, char *found_interp) 287static char *scanelf_file_interp(elfobj *elf, char *found_interp)
220{ 288{
221 void *strtbl_void; 289 void *strtbl_void;
222 290
223 if (!show_interp) return; 291 if (!show_interp) return NULL;
224 292
225 strtbl_void = elf_findsecbyname(elf, ".interp"); 293 strtbl_void = elf_findsecbyname(elf, ".interp");
226 294
227 if (strtbl_void) { 295 if (strtbl_void) {
228#define SHOW_INTERP(B) \ 296#define SHOW_INTERP(B) \
229 if (elf->elf_class == ELFCLASS ## B) { \ 297 if (elf->elf_class == ELFCLASS ## B) { \
230 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 298 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
231 printf("%s ", elf->data + EGET(strtbl->sh_offset)); \
232 *found_interp = 1; \ 299 *found_interp = 1; \
300 return elf->data + EGET(strtbl->sh_offset); \
233 } 301 }
234 SHOW_INTERP(32) 302 SHOW_INTERP(32)
235 SHOW_INTERP(64) 303 SHOW_INTERP(64)
236 } 304 }
237 if (!be_quiet && !*found_interp) 305 return NULL;
238 printf(" - ");
239 else if (*found_interp)
240 printf(" ");
241} 306}
307static char *scanelf_file_bind(elfobj *elf, char *found_bind)
308{
309 unsigned long i;
310 struct stat s;
311
312 if (!show_bind) return NULL;
313 if (!elf->phdr) return NULL;
314
315#define SHOW_BIND(B) \
316 if (elf->elf_class == ELFCLASS ## B) { \
317 Elf ## B ## _Dyn *dyn; \
318 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
319 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
320 Elf ## B ## _Off offset; \
321 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
322 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
323 offset = EGET(phdr[i].p_offset); \
324 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
325 dyn = DYN ## B (elf->data + offset); \
326 while (EGET(dyn->d_tag) != DT_NULL) { \
327 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
328 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
329 { \
330 if (be_quiet) return NULL; \
331 *found_bind = 1; \
332 return "NOW"; \
333 } \
334 ++dyn; \
335 } \
336 } \
337 }
338 SHOW_BIND(32)
339 SHOW_BIND(64)
340
341 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
342 return NULL;
343 } else {
344 *found_bind = 1;
345 return "LAZY";
346 }
347}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 348static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
243{ 349{
244 int i; 350 unsigned long i;
245 void *symtab_void, *strtab_void; 351 void *symtab_void, *strtab_void;
246 352
247 if (!find_sym) return; 353 if (!find_sym) return NULL;
248 354
249 symtab_void = elf_findsecbyname(elf, ".symtab"); 355 symtab_void = elf_findsecbyname(elf, ".symtab");
250 strtab_void = elf_findsecbyname(elf, ".strtab"); 356 strtab_void = elf_findsecbyname(elf, ".strtab");
251 357
252 if (symtab_void && strtab_void) { 358 if (symtab_void && strtab_void) {
253#define FIND_SYM(B) \ 359#define FIND_SYM(B) \
254 if (elf->elf_class == ELFCLASS ## B) { \ 360 if (elf->elf_class == ELFCLASS ## B) { \
255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 361 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 362 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
257 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 363 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
258 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 364 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
259 char *symname; \ 365 char *symname; \
260 for (i = 0; i < cnt; ++i) { \ 366 for (i = 0; i < cnt; ++i) { \
261 if (sym->st_name) { \ 367 if (sym->st_name) { \
262 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 368 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
263 if (*find_sym == '*') { \ 369 if (*find_sym == '*') { \
275 ++sym; \ 381 ++sym; \
276 } } 382 } }
277 FIND_SYM(32) 383 FIND_SYM(32)
278 FIND_SYM(64) 384 FIND_SYM(64)
279 } 385 }
280 if (*find_sym != '*') { 386 if (*find_sym != '*' && *found_sym)
281 if (*found_sym) 387 return find_sym;
282 printf(" %s ", find_sym);
283 else if (!be_quiet) 388 if (be_quiet)
284 printf(" - "); 389 return NULL;
285 } 390 else
391 return " - ";
286} 392}
287/* scan an elf file and show all the fun stuff */ 393/* scan an elf file and show all the fun stuff */
394#define prints(str) fputs(str, stdout)
288static void scanelf_file(const char *filename) 395static void scanelf_file(const char *filename)
289{ 396{
290 int i; 397 unsigned long i;
291 char found_pax, found_stack, found_relro, found_textrel, 398 char found_pax, found_stack, found_relro, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym, 399 found_rpath, found_needed, found_interp, found_bind,
293 found_file; 400 found_sym, found_file;
294 elfobj *elf; 401 elfobj *elf;
295 struct stat st; 402 struct stat st;
403 static char *out_buffer = NULL;
404 static size_t out_len;
296 405
297 /* make sure 'filename' exists */ 406 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) { 407 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename); 408 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return; 409 return;
301 } 410 }
302 /* always handle regular files and handle symlinked files if no -y */ 411 /* 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))) { 412 if (S_ISLNK(st.st_mode)) {
413 if (!scan_symlink) return;
414 stat(filename, &st);
415 }
416 if (!S_ISREG(st.st_mode)) {
304 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 417 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
305 return; 418 return;
306 } 419 }
307 420
308 found_pax = found_stack = found_relro = found_textrel = \ 421 found_pax = found_stack = found_relro = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \ 422 found_rpath = found_needed = found_interp = found_bind = \
310 found_file = 0; 423 found_sym = found_file = 0;
311 424
312 /* verify this is real ELF */ 425 /* verify this is real ELF */
313 if ((elf = readelf(filename)) == NULL) { 426 if ((elf = readelf(filename)) == NULL) {
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 427 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return; 428 return;
316 } 429 }
317 430
318 if (be_verbose > 1) 431 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename, 432 printf("%s: scanning file {%s,%s}\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class), 433 get_elfeitype(elf, EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 434 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose) 435 else if (be_verbose)
323 printf("%s: scanning file\n", filename); 436 printf("%s: scanning file\n", filename);
324 437
438 /* init output buffer */
439 if (!out_buffer) {
440 out_len = sizeof(char) * 80;
441 out_buffer = (char*)xmalloc(out_len);
442 }
443 *out_buffer = '\0';
444
325 /* show the header */ 445 /* show the header */
326 if (!be_quiet && show_banner) { 446 if (!be_quiet && show_banner) {
327 if (out_format) {
328 for (i=0; out_format[i]; ++i) { 447 for (i = 0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue; 448 if (out_format[i] != '%') continue;
330 449
331 switch (out_format[++i]) { 450 switch (out_format[++i]) {
332 case '%': break; 451 case '%': break;
452 case 'F': prints("FILE "); found_file = 1; break;
333 case 'F': printf("FILE "); break; 453 case 'o': prints(" TYPE "); break;
334 case 'x': printf(" PAX "); break; 454 case 'x': prints(" PAX "); break;
335 case 'e': printf("STK/REL "); break; 455 case 'e': prints("STK/REL "); break;
336 case 't': printf("TEXTREL "); break; 456 case 't': prints("TEXTREL "); break;
337 case 'r': printf("RPATH "); break; 457 case 'r': prints("RPATH "); break;
338 case 'n': printf("NEEDED "); break; 458 case 'n': prints("NEEDED "); break;
339 case 'i': printf("INTERP "); break; 459 case 'i': prints("INTERP "); break;
460 case 'b': prints("BIND "); break;
340 case 's': printf("SYM "); break; 461 case 's': prints("SYM "); break;
341 }
342 } 462 }
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 } 463 }
353 if (!found_file) printf(" FILE"); 464 if (!found_file) prints("FILE ");
354 printf("\n"); 465 prints("\n");
466 found_file = 0;
355 show_banner = 0; 467 show_banner = 0;
356 } 468 }
357 469
358 /* dump all the good stuff */ 470 /* 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) { 471 for (i = 0; out_format[i]; ++i) {
472 const char *out;
473
474 /* make sure we trim leading spaces in quiet mode */
475 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
476 *out_buffer = '\0';
477
364 if (out_format[i] != '%') { 478 if (out_format[i] != '%') {
365 printf("%c", out_format[i]); 479 xchrcat(&out_buffer, out_format[i], &out_len);
366 continue; 480 continue;
367 } 481 }
368 482
483 out = NULL;
369 switch (out_format[++i]) { 484 switch (out_format[++i]) {
370 case '%': printf("%%"); break; 485 case '%': xchrcat(&out_buffer, '%', &out_len); break;
371 case 'F': found_file = 1; printf("%s ", filename); break; 486 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
487 case 'o': out = get_elfetype(elf); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break; 488 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break; 489 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
374 case 't': scanelf_file_textrel(elf, &found_textrel); break; 490 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break; 491 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break; 492 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break; 493 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
494 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break; 495 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
379 } 496 }
497 if (out) xstrcat(&out_buffer, out, &out_len);
380 } 498 }
381 } else {
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 }
390 499
391 if (!found_file) { 500#define FOUND_SOMETHING() \
392 if (!be_quiet || found_pax || found_stack || found_textrel || \ 501 (found_pax || found_stack || found_textrel || found_rpath || \
393 found_rpath || found_needed || found_sym) 502 found_needed || found_interp || found_bind || found_sym)
394 puts(filename); 503
395 } else { 504 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
396 printf("\n"); 505 xchrcat(&out_buffer, ' ', &out_len);
506 xstrcat(&out_buffer, filename, &out_len);
397 } 507 }
508 if (!be_quiet || (be_quiet && FOUND_SOMETHING()))
509 puts(out_buffer);
398 510
399 unreadelf(elf); 511 unreadelf(elf);
400} 512}
401 513
402/* scan a directory for ET_EXEC files and print when we find one */ 514/* scan a directory for ET_EXEC files and print when we find one */
447 } 559 }
448 } 560 }
449 closedir(dir); 561 closedir(dir);
450} 562}
451 563
564static int scanelf_from_file(char *filename)
565{
566 FILE *fp = NULL;
567 char *p;
568 char path[_POSIX_PATH_MAX];
569
570 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
571 fp = stdin;
572 else if ((fp = fopen(filename, "r")) == NULL)
573 return 1;
574
575 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
576 if ((p = strchr(path, '\n')) != NULL)
577 *p = 0;
578 scanelf_dir(path);
579 }
580 if (fp != stdin)
581 fclose(fp);
582 return 0;
583}
584
585static void load_ld_so_conf()
586{
587 FILE *fp = NULL;
588 char *p;
589 char path[_POSIX_PATH_MAX];
590 int i = 0;
591
592 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
593 return;
594
595 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
596 if (*path != '/')
597 continue;
598
599 if ((p = strrchr(path, '\r')) != NULL)
600 *p = 0;
601 if ((p = strchr(path, '\n')) != NULL)
602 *p = 0;
603
604 ldpaths[i++] = xstrdup(path);
605
606 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
607 break;
608 }
609 ldpaths[i] = NULL;
610
611 fclose(fp);
612}
613
452/* scan /etc/ld.so.conf for paths */ 614/* scan /etc/ld.so.conf for paths */
453static void scanelf_ldpath() 615static void scanelf_ldpath()
454{ 616{
455 char scan_l, scan_ul, scan_ull; 617 char scan_l, scan_ul, scan_ull;
456 char *path, *p; 618 int i = 0;
457 FILE *fp;
458 619
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 620 if (!ldpaths[0])
460 err("Unable to open ld.so.conf: %s", strerror(errno)); 621 err("Unable to load any paths from ld.so.conf");
461 622
462 scan_l = scan_ul = scan_ull = 0; 623 scan_l = scan_ul = scan_ull = 0;
463 624
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 625 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; 626 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 627 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 628 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
477 scanelf_dir(path); 629 scanelf_dir(ldpaths[i]);
630 ++i;
478 } 631 }
479 free(path);
480 fclose(fp);
481 632
482 if (!scan_l) scanelf_dir("/lib"); 633 if (!scan_l) scanelf_dir("/lib");
483 if (!scan_ul) scanelf_dir("/usr/lib"); 634 if (!scan_ul) scanelf_dir("/usr/lib");
484 if (!scan_ull) scanelf_dir("/usr/local/lib"); 635 if (!scan_ull) scanelf_dir("/usr/local/lib");
485} 636}
490 char *path, *p; 641 char *path, *p;
491 642
492 path = getenv("PATH"); 643 path = getenv("PATH");
493 if (!path) 644 if (!path)
494 err("PATH is not set in your env !"); 645 err("PATH is not set in your env !");
495 646 path = xstrdup(path);
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498 647
499 while ((p = strrchr(path, ':')) != NULL) { 648 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1); 649 scanelf_dir(p + 1);
501 *p = 0; 650 *p = 0;
502 } 651 }
505} 654}
506 655
507 656
508 657
509/* usage / invocation handling functions */ 658/* usage / invocation handling functions */
510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV" 659#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV"
511#define a_argument required_argument 660#define a_argument required_argument
512static struct option const long_opts[] = { 661static struct option const long_opts[] = {
513 {"path", no_argument, NULL, 'p'}, 662 {"path", no_argument, NULL, 'p'},
514 {"ldpath", no_argument, NULL, 'l'}, 663 {"ldpath", no_argument, NULL, 'l'},
515 {"recursive", no_argument, NULL, 'R'}, 664 {"recursive", no_argument, NULL, 'R'},
519 {"header", no_argument, NULL, 'e'}, 668 {"header", no_argument, NULL, 'e'},
520 {"textrel", no_argument, NULL, 't'}, 669 {"textrel", no_argument, NULL, 't'},
521 {"rpath", no_argument, NULL, 'r'}, 670 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'}, 671 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'}, 672 {"interp", no_argument, NULL, 'i'},
673 {"bind", no_argument, NULL, 'b'},
524 {"symbol", a_argument, NULL, 's'}, 674 {"symbol", a_argument, NULL, 's'},
525 {"all", no_argument, NULL, 'a'}, 675 {"all", no_argument, NULL, 'a'},
526 {"quiet", no_argument, NULL, 'q'}, 676 {"quiet", no_argument, NULL, 'q'},
527 {"verbose", no_argument, NULL, 'v'}, 677 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'}, 678 {"format", a_argument, NULL, 'F'},
679 {"from", a_argument, NULL, 'f'},
529 {"file", a_argument, NULL, 'o'}, 680 {"file", a_argument, NULL, 'o'},
530 {"nobanner", no_argument, NULL, 'B'}, 681 {"nobanner", no_argument, NULL, 'B'},
531 {"help", no_argument, NULL, 'h'}, 682 {"help", no_argument, NULL, 'h'},
532 {"version", no_argument, NULL, 'V'}, 683 {"version", no_argument, NULL, 'V'},
533 {NULL, no_argument, NULL, 0x0} 684 {NULL, no_argument, NULL, 0x0}
542 "Print GNU_STACK markings", 693 "Print GNU_STACK markings",
543 "Print TEXTREL information", 694 "Print TEXTREL information",
544 "Print RPATH information", 695 "Print RPATH information",
545 "Print NEEDED information", 696 "Print NEEDED information",
546 "Print INTERP information", 697 "Print INTERP information",
698 "Print BIND information",
547 "Find a specified symbol", 699 "Find a specified symbol",
548 "Print all scanned info (-x -e -t -r)\n", 700 "Print all scanned info (-x -e -t -r -n -i)\n",
549 "Only output 'bad' things", 701 "Only output 'bad' things",
550 "Be verbose (can be specified more than once)", 702 "Be verbose (can be specified more than once)",
551 "Use specified format for output", 703 "Use specified format for output",
704 "Read input stream from a filename",
552 "Write output stream to a filename", 705 "Write output stream to a filename",
553 "Don't display the header", 706 "Don't display the header",
554 "Print this help and exit", 707 "Print this help and exit",
555 "Print version and exit", 708 "Print version and exit",
556 NULL 709 NULL
557}; 710};
558 711
559/* display usage and exit */ 712/* display usage and exit */
560static void usage(int status) 713static void usage(int status)
561{ 714{
562 int i; 715 unsigned long i;
563 printf(" Scan ELF binaries for stuff\n\n" 716 printf("* Scan ELF binaries for stuff\n\n"
564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 717 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
565 printf("Options: -[%s]\n", PARSE_FLAGS); 718 printf("Options: -[%s]\n", PARSE_FLAGS);
566 for (i = 0; long_opts[i].name; ++i) 719 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument) 720 if (long_opts[i].has_arg == no_argument)
568 printf(" -%c, --%-13s %s\n", long_opts[i].val, 721 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
569 long_opts[i].name, opts_help[i]); 722 long_opts[i].name, opts_help[i]);
570 else 723 else
571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 724 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val,
572 long_opts[i].name, opts_help[i]); 725 long_opts[i].name, opts_help[i]);
726
727 if (status != EXIT_SUCCESS)
728 exit(status);
729
730 puts("\nThe format modifiers for the -F option are:");
731 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO");
732 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED");
733 puts(" %i INTERP \t%b BIND \t%s symbol");
734
573 exit(status); 735 exit(status);
574} 736}
575 737
576/* parse command line arguments and preform needed actions */ 738/* parse command line arguments and preform needed actions */
577static void parseargs(int argc, char *argv[]) 739static void parseargs(int argc, char *argv[])
578{ 740{
579 int flag; 741 int i;
742 char *from_file = NULL;
580 743
581 opterr = 0; 744 opterr = 0;
582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 745 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
583 switch (flag) { 746 switch (i) {
584 747
585 case 'V': 748 case 'V':
586 printf("%s compiled %s\n%s\n" 749 printf("%s compiled %s\n%s\n"
587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 750 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
588 __FILE__, __DATE__, rcsid, argv0); 751 __FILE__, __DATE__, rcsid, argv0);
589 exit(EXIT_SUCCESS); 752 exit(EXIT_SUCCESS);
590 break; 753 break;
591 case 'h': usage(EXIT_SUCCESS); break; 754 case 'h': usage(EXIT_SUCCESS); break;
592 755 case 'f':
756 if (from_file == NULL)
757 from_file = xstrdup(optarg);
758 break;
593 case 'o': { 759 case 'o': {
594 FILE *fp = NULL; 760 FILE *fp = NULL;
595 fp = freopen(optarg, "w", stdout); 761 fp = freopen(optarg, "w", stdout);
596 if (fp == NULL) 762 if (fp == NULL)
597 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 763 err("Could not open output stream '%s': %s", optarg, strerror(errno));
599 break; 765 break;
600 } 766 }
601 767
602 case 's': { 768 case 's': {
603 size_t len; 769 size_t len;
604 find_sym = strdup(optarg); 770 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; 771 len = strlen(find_sym) + 1;
611 versioned_symname = (char *)malloc(sizeof(char) * (len+1)); 772 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); 773 sprintf(versioned_symname, "%s@", find_sym);
619 break; 774 break;
620 } 775 }
621 776
622 case 'F': { 777 case 'F': {
623 out_format = strdup(optarg); 778 out_format = xstrdup(optarg);
624 if (!out_format)
625 err("Could not malloc() mem for output format");
626 break; 779 break;
627 } 780 }
628 781
629 case 'y': scan_symlink = 0; break; 782 case 'y': scan_symlink = 0; break;
630 case 'B': show_banner = 0; break; 783 case 'B': show_banner = 0; break;
636 case 'e': show_stack = 1; break; 789 case 'e': show_stack = 1; break;
637 case 't': show_textrel = 1; break; 790 case 't': show_textrel = 1; break;
638 case 'r': show_rpath = 1; break; 791 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break; 792 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break; 793 case 'i': show_interp = 1; break;
794 case 'b': show_bind = 1; break;
641 case 'q': be_quiet = 1; break; 795 case 'q': be_quiet = 1; break;
642 case 'v': be_verbose = (be_verbose % 20) + 1; break; 796 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; 797 case 'a': show_pax = show_stack = show_textrel = show_rpath = \
798 show_needed = show_interp = show_bind = 1; break;
644 799
645 case ':': 800 case ':':
646 warn("Option missing parameter\n"); 801 err("Option missing parameter\n");
647 usage(EXIT_FAILURE);
648 break;
649 case '?': 802 case '?':
650 warn("Unknown option\n"); 803 err("Unknown option\n");
651 usage(EXIT_FAILURE);
652 break;
653 default: 804 default:
654 err("Unhandled option '%c'", flag); 805 err("Unhandled option '%c'", i);
655 break;
656 }
657 } 806 }
658 807 }
659 if (be_quiet && be_verbose)
660 err("You can be quiet or you can be verbose, not both, stupid");
661 808
662 /* let the format option override all other options */ 809 /* let the format option override all other options */
663 if (out_format) { 810 if (out_format) {
664 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0; 811 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0;
665 for (flag=0; out_format[flag]; ++flag) { 812 for (i = 0; out_format[i]; ++i) {
666 if (out_format[flag] != '%') continue; 813 if (out_format[i] != '%') continue;
667 814
668 switch (out_format[++flag]) { 815 switch (out_format[++i]) {
669 case '%': break; 816 case '%': break;
670 case 'F': break; 817 case 'F': break;
671 case 's': break; 818 case 's': break;
819 case 'o': break;
672 case 'x': show_pax = 1; break; 820 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break; 821 case 'e': show_stack = 1; break;
674 case 't': show_textrel = 1; break; 822 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break; 823 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break; 824 case 'n': show_needed = 1; break;
677 case 'i': show_interp = 1; break; 825 case 'i': show_interp = 1; break;
826 case 'b': show_bind = 1; break;
678 default: 827 default:
679 err("Invalid format specifier '%c' (byte %i)", 828 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1); 829 out_format[i], i+1);
681 } 830 }
682 } 831 }
832
833 /* construct our default format */
834 } else {
835 size_t fmt_len = 30;
836 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
837 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
838 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
839 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len);
840 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
841 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
842 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
843 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
844 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
845 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
846 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
683 } 847 }
848 if (be_verbose > 2) printf("Format: %s\n", out_format);
684 849
685 /* now lets actually do the scanning */ 850 /* now lets actually do the scanning */
851 if (scan_ldpath || (show_rpath && be_quiet))
852 load_ld_so_conf();
686 if (scan_ldpath) scanelf_ldpath(); 853 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath(); 854 if (scan_envpath) scanelf_envpath();
855 if (from_file) {
856 scanelf_from_file(from_file);
857 free(from_file);
858 from_file = *argv;
859 }
688 if (optind == argc && !scan_ldpath && !scan_envpath) 860 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
689 err("Nothing to scan !?"); 861 err("Nothing to scan !?");
690 while (optind < argc) 862 while (optind < argc)
691 scanelf_dir(argv[optind++]); 863 scanelf_dir(argv[optind++]);
692 864
693 /* clean up */ 865 /* clean up */
694 if (find_sym) { 866 if (find_sym) {
695 free(find_sym); 867 free(find_sym);
696 free(versioned_symname); 868 free(versioned_symname);
697 } 869 }
698 if (out_format) free(out_format); 870 if (out_format) free(out_format);
871 for (i = 0; ldpaths[i]; ++i)
872 free(ldpaths[i]);
873}
874
875
876
877/* utility funcs */
878static char *xstrdup(char *s)
879{
880 char *ret = strdup(s);
881 if (!ret) err("Could not strdup(): %s", strerror(errno));
882 return ret;
883}
884static void *xmalloc(size_t size)
885{
886 void *ret = malloc(size);
887 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
888 return ret;
889}
890static void xstrcat(char **dst, const char *src, size_t *curr_len)
891{
892 long new_len;
893
894 new_len = strlen(*dst) + strlen(src);
895 if (*curr_len <= new_len) {
896 *curr_len = new_len + (*curr_len / 2);
897 *dst = realloc(*dst, *curr_len);
898 if (!*dst)
899 err("could not realloc %li bytes", (unsigned long)*curr_len);
900 }
901
902 strcat(*dst, src);
903}
904static inline void xchrcat(char **dst, const char append, size_t *curr_len)
905{
906 static char my_app[2];
907 my_app[0] = append;
908 my_app[1] = '\0';
909 xstrcat(dst, my_app, curr_len);
699} 910}
700 911
701 912
702 913
703int main(int argc, char *argv[]) 914int main(int argc, char *argv[])

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