/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.40 Revision 1.52
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 1.52 2005/05/18 14:37:21 solar 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 1.52 2005/05/18 14:37:21 solar 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);
54static int xemptybuffer(const char *buff);
50 55
51/* variables to control behavior */ 56/* variables to control behavior */
57static char *ldpaths[256];
52static char scan_ldpath = 0; 58static char scan_ldpath = 0;
53static char scan_envpath = 0; 59static char scan_envpath = 0;
54static char scan_symlink = 1; 60static char scan_symlink = 1;
55static char dir_recurse = 0; 61static char dir_recurse = 0;
56static char dir_crossmount = 1; 62static char dir_crossmount = 1;
58static char show_stack = 0; 64static char show_stack = 0;
59static char show_textrel = 0; 65static char show_textrel = 0;
60static char show_rpath = 0; 66static char show_rpath = 0;
61static char show_needed = 0; 67static char show_needed = 0;
62static char show_interp = 0; 68static char show_interp = 0;
69static char show_bind = 0;
63static char show_banner = 1; 70static char show_banner = 1;
64static char be_quiet = 0; 71static char be_quiet = 0;
65static char be_verbose = 0; 72static char be_verbose = 0;
66static char *find_sym = NULL, *versioned_symname = NULL; 73static char *find_sym = NULL, *versioned_symname = NULL;
67static char *out_format = NULL; 74static char *out_format = NULL;
68 75
69 76
70 77
71/* sub-funcs for scanelf_file() */ 78/* sub-funcs for scanelf_file() */
72static void scanelf_file_pax(elfobj *elf, char *found_pax) 79static char *scanelf_file_pax(elfobj *elf, char *found_pax)
73{ 80{
74 char *paxflags; 81 static char *paxflags;
82
75 if (!show_pax) return; 83 if (!show_pax) return NULL;
76 84
77 paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 85 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
78 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 86 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
79 *found_pax = 1; 87 *found_pax = 1;
80 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 88 return paxflags;
81 } 89 }
90
91 return NULL;
82} 92}
83static void scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro) 93static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
84{ 94{
85 int i; 95 static char ret[8];
96 char *found;
97 unsigned long i, off, shown;
98
86 if (!show_stack) return; 99 if (!show_stack) return NULL;
100
101 shown = 0;
102 strcpy(ret, "--- ---");
103
104 if (elf->phdr) {
87#define SHOW_STACK(B) \ 105#define SHOW_STACK(B) \
88 if (elf->elf_class == ELFCLASS ## B) { \ 106 if (elf->elf_class == ELFCLASS ## B) { \
89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 107 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 108 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 109 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 110 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
111 found = found_stack; \
112 off = 0; \
93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 113 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
114 found = found_relro; \
115 off = 3; \
116 } else \
117 continue; \
94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 118 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
95 continue; \ 119 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))); \ 120 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
121 *found = 1; \
122 ++shown; \
101 } \ 123 } \
102 } 124 }
103 SHOW_STACK(32) 125 SHOW_STACK(32)
104 SHOW_STACK(64) 126 SHOW_STACK(64)
105 if (!be_quiet && !*found_stack) printf("--- "); 127 }
106 if (!be_quiet && !*found_relro) printf("--- "); 128
129 if (be_quiet && !shown)
130 return NULL;
131 else
132 return ret;
107} 133}
108static void scanelf_file_textrel(elfobj *elf, char *found_textrel) 134static char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
109{ 135{
110 int i; 136 static char *ret = "TEXTREL";
137 unsigned long i;
138
111 if (!show_textrel) return; 139 if (!show_textrel) return NULL;
140
141 if (elf->phdr) {
112#define SHOW_TEXTREL(B) \ 142#define SHOW_TEXTREL(B) \
113 if (elf->elf_class == ELFCLASS ## B) { \ 143 if (elf->elf_class == ELFCLASS ## B) { \
114 Elf ## B ## _Dyn *dyn; \ 144 Elf ## B ## _Dyn *dyn; \
115 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 145 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
116 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 146 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
147 Elf ## B ## _Off offset; \
117 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 148 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
118 if (phdr[i].p_type != PT_DYNAMIC) continue; \ 149 if (phdr[i].p_type != PT_DYNAMIC) continue; \
150 offset = EGET(phdr[i].p_offset); \
151 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
119 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 152 dyn = DYN ## B (elf->data + offset); \
120 while (EGET(dyn->d_tag) != DT_NULL) { \ 153 while (EGET(dyn->d_tag) != DT_NULL) { \
121 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 154 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
122 *found_textrel = 1; \ 155 *found_textrel = 1; \
123 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 156 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
124 printf("TEXTREL "); \ 157 return ret; \
125 } \ 158 } \
126 ++dyn; \ 159 ++dyn; \
127 } \ 160 } \
128 } } 161 } }
129 SHOW_TEXTREL(32) 162 SHOW_TEXTREL(32)
130 SHOW_TEXTREL(64) 163 SHOW_TEXTREL(64)
131 if (!be_quiet && !*found_textrel) printf("------- "); 164 }
165
166 if (be_quiet)
167 return NULL;
168 else
169 return " - ";
132} 170}
133static void scanelf_file_rpath(elfobj *elf, char *found_rpath) 171static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
134{ 172{
135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 173 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
136 int i; 174 unsigned long i, s;
137 char *rpath, *runpath; 175 char *rpath, *runpath, **r;
138 void *strtbl_void; 176 void *strtbl_void;
139 177
140 if (!show_rpath) return; 178 if (!show_rpath) return;
141 179
142 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 180 strtbl_void = elf_findsecbyname(elf, ".dynstr");
143 rpath = runpath = NULL; 181 rpath = runpath = NULL;
144 182
145 if (strtbl_void) { 183 if (elf->phdr && strtbl_void) {
146#define SHOW_RPATH(B) \ 184#define SHOW_RPATH(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \ 185 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Dyn *dyn; \ 186 Elf ## B ## _Dyn *dyn; \
149 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 187 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
150 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 188 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
151 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 189 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
190 Elf ## B ## _Off offset; \
191 Elf ## B ## _Sxword word; \
192 /* Scan all the program headers */ \
152 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 193 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
194 /* Just scan dynamic headers */ \
153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 195 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
196 offset = EGET(phdr[i].p_offset); \
197 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
198 /* Just scan dynamic RPATH/RUNPATH headers */ \
154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 199 dyn = DYN ## B (elf->data + offset); \
155 while (EGET(dyn->d_tag) != DT_NULL) { \ 200 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
156 if (EGET(dyn->d_tag) == DT_RPATH) { \ 201 if (word == DT_RPATH) { \
202 r = &rpath; \
203 } else if (word == DT_RUNPATH) { \
204 r = &runpath; \
205 } else { \
206 ++dyn; \
207 continue; \
208 } \
209 /* Verify the memory is somewhat sane */ \
157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 210 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
211 if (offset < elf->len) { \
212 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
213 *r = (char*)(elf->data + offset); \
214 /* If quiet, don't output paths in ld.so.conf */ \
215 if (be_quiet) \
216 for (s = 0; ldpaths[s]; ++s) \
217 if (!strcmp(ldpaths[s], *r)) { \
218 *r = NULL; \
219 break; \
220 } \
158 *found_rpath = 1; \ 221 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 } \ 222 } \
163 ++dyn; \ 223 ++dyn; \
164 } \ 224 } \
165 } } 225 } }
166 SHOW_RPATH(32) 226 SHOW_RPATH(32)
167 SHOW_RPATH(64) 227 SHOW_RPATH(64)
168 } 228 }
229
169 if (rpath && runpath) { 230 if (rpath && runpath) {
170 if (!strcmp(rpath, runpath)) 231 if (!strcmp(rpath, runpath)) {
171 printf("%-5s ", runpath); 232 xstrcat(ret, runpath, ret_len);
172 else { 233 } else {
173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); 234 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
174 printf("{%s,%s} ", rpath, runpath); 235 xchrcat(ret, '{', ret_len);
236 xstrcat(ret, rpath, ret_len);
237 xchrcat(ret, ',', ret_len);
238 xstrcat(ret, runpath, ret_len);
239 xchrcat(ret, '}', ret_len);
175 } 240 }
176 } else if (rpath || runpath) 241 } else if (rpath || runpath)
177 printf("%-5s ", (runpath ? runpath : rpath)); 242 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
178 else if (!be_quiet && !*found_rpath) 243 else if (!be_quiet)
179 printf(" - "); 244 xstrcat(ret, " - ", ret_len);
180} 245}
181static void scanelf_file_needed(elfobj *elf, char *found_needed) 246static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len)
182{ 247{
183 int i; 248 unsigned long i;
184 char *needed; 249 char *needed;
185 void *strtbl_void; 250 void *strtbl_void;
186 251
187 if (!show_needed) return; 252 if (!show_needed) return;
188 253
189 strtbl_void = elf_findsecbyname(elf, ".dynstr"); 254 strtbl_void = elf_findsecbyname(elf, ".dynstr");
190 255
191 if (strtbl_void) { 256 if (elf->phdr && strtbl_void) {
192#define SHOW_NEEDED(B) \ 257#define SHOW_NEEDED(B) \
193 if (elf->elf_class == ELFCLASS ## B) { \ 258 if (elf->elf_class == ELFCLASS ## B) { \
194 Elf ## B ## _Dyn *dyn; \ 259 Elf ## B ## _Dyn *dyn; \
195 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 260 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
196 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 261 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
197 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 262 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
263 Elf ## B ## _Off offset; \
198 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 264 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 265 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
266 offset = EGET(phdr[i].p_offset); \
267 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 268 dyn = DYN ## B (elf->data + offset); \
201 while (EGET(dyn->d_tag) != DT_NULL) { \ 269 while (EGET(dyn->d_tag) != DT_NULL) { \
202 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 270 if (EGET(dyn->d_tag) == DT_NEEDED) { \
203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 271 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 if (*found_needed) printf(","); \ 272 if (offset >= elf->len) { \
205 printf("%s", needed); \ 273 ++dyn; \
274 continue; \
275 } \
276 needed = (char*)(elf->data + offset); \
277 if (*found_needed) xchrcat(ret, ',', ret_len); \
278 xstrcat(ret, needed, ret_len); \
206 *found_needed = 1; \ 279 *found_needed = 1; \
207 } \ 280 } \
208 ++dyn; \ 281 ++dyn; \
209 } \ 282 } \
210 } } 283 } }
211 SHOW_NEEDED(32) 284 SHOW_NEEDED(32)
212 SHOW_NEEDED(64) 285 SHOW_NEEDED(64)
213 } 286 }
214 if (!be_quiet && !*found_needed)
215 printf(" - ");
216 else if (*found_needed)
217 printf(" ");
218} 287}
219static void scanelf_file_interp(elfobj *elf, char *found_interp) 288static char *scanelf_file_interp(elfobj *elf, char *found_interp)
220{ 289{
221 void *strtbl_void; 290 void *strtbl_void;
222 291
223 if (!show_interp) return; 292 if (!show_interp) return NULL;
224 293
225 strtbl_void = elf_findsecbyname(elf, ".interp"); 294 strtbl_void = elf_findsecbyname(elf, ".interp");
226 295
227 if (strtbl_void) { 296 if (strtbl_void) {
228#define SHOW_INTERP(B) \ 297#define SHOW_INTERP(B) \
229 if (elf->elf_class == ELFCLASS ## B) { \ 298 if (elf->elf_class == ELFCLASS ## B) { \
230 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 299 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
231 printf("%s ", elf->data + EGET(strtbl->sh_offset)); \
232 *found_interp = 1; \ 300 *found_interp = 1; \
301 return elf->data + EGET(strtbl->sh_offset); \
233 } 302 }
234 SHOW_INTERP(32) 303 SHOW_INTERP(32)
235 SHOW_INTERP(64) 304 SHOW_INTERP(64)
236 } 305 }
237 if (!be_quiet && !*found_interp) 306 return NULL;
238 printf(" - ");
239 else if (*found_interp)
240 printf(" ");
241} 307}
308static char *scanelf_file_bind(elfobj *elf, char *found_bind)
309{
310 unsigned long i;
311 struct stat s;
312
313 if (!show_bind) return NULL;
314 if (!elf->phdr) return NULL;
315
316#define SHOW_BIND(B) \
317 if (elf->elf_class == ELFCLASS ## B) { \
318 Elf ## B ## _Dyn *dyn; \
319 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
320 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
321 Elf ## B ## _Off offset; \
322 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
323 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
324 offset = EGET(phdr[i].p_offset); \
325 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
326 dyn = DYN ## B (elf->data + offset); \
327 while (EGET(dyn->d_tag) != DT_NULL) { \
328 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
329 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
330 { \
331 if (be_quiet) return NULL; \
332 *found_bind = 1; \
333 return "NOW"; \
334 } \
335 ++dyn; \
336 } \
337 } \
338 }
339 SHOW_BIND(32)
340 SHOW_BIND(64)
341
342 fstat(elf->fd, &s);
343 if (be_quiet && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
344 return NULL;
345 } else {
346 *found_bind = 1;
347 return "LAZY";
348 }
349}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 350static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
243{ 351{
244 int i; 352 unsigned long i;
245 void *symtab_void, *strtab_void; 353 void *symtab_void, *strtab_void;
246 354
247 if (!find_sym) return; 355 if (!find_sym) return NULL;
248 356
249 symtab_void = elf_findsecbyname(elf, ".symtab"); 357 symtab_void = elf_findsecbyname(elf, ".symtab");
250 strtab_void = elf_findsecbyname(elf, ".strtab"); 358 strtab_void = elf_findsecbyname(elf, ".strtab");
251 359
252 if (symtab_void && strtab_void) { 360 if (symtab_void && strtab_void) {
253#define FIND_SYM(B) \ 361#define FIND_SYM(B) \
254 if (elf->elf_class == ELFCLASS ## B) { \ 362 if (elf->elf_class == ELFCLASS ## B) { \
255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 363 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 364 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
257 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 365 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
258 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 366 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
259 char *symname; \ 367 char *symname; \
260 for (i = 0; i < cnt; ++i) { \ 368 for (i = 0; i < cnt; ++i) { \
261 if (sym->st_name) { \ 369 if (sym->st_name) { \
262 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 370 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
263 if (*find_sym == '*') { \ 371 if (*find_sym == '*') { \
275 ++sym; \ 383 ++sym; \
276 } } 384 } }
277 FIND_SYM(32) 385 FIND_SYM(32)
278 FIND_SYM(64) 386 FIND_SYM(64)
279 } 387 }
280 if (*find_sym != '*') { 388 if (*find_sym != '*' && *found_sym)
281 if (*found_sym) 389 return find_sym;
282 printf(" %s ", find_sym);
283 else if (!be_quiet) 390 if (be_quiet)
284 printf(" - "); 391 return NULL;
285 } 392 else
393 return " - ";
286} 394}
287/* scan an elf file and show all the fun stuff */ 395/* scan an elf file and show all the fun stuff */
396#define prints(str) fputs(str, stdout)
288static void scanelf_file(const char *filename) 397static void scanelf_file(const char *filename)
289{ 398{
290 int i; 399 unsigned long i;
291 char found_pax, found_stack, found_relro, found_textrel, 400 char found_pax, found_stack, found_relro, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym, 401 found_rpath, found_needed, found_interp, found_bind,
293 found_file; 402 found_sym, found_file;
294 elfobj *elf; 403 elfobj *elf;
295 struct stat st; 404 struct stat st;
405 static char *out_buffer = NULL;
406 static size_t out_len;
296 407
297 /* make sure 'filename' exists */ 408 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) { 409 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename); 410 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return; 411 return;
304 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 415 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
305 return; 416 return;
306 } 417 }
307 418
308 found_pax = found_stack = found_relro = found_textrel = \ 419 found_pax = found_stack = found_relro = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \ 420 found_rpath = found_needed = found_interp = found_bind = \
310 found_file = 0; 421 found_sym = found_file = 0;
311 422
312 /* verify this is real ELF */ 423 /* verify this is real ELF */
313 if ((elf = readelf(filename)) == NULL) { 424 if ((elf = readelf(filename)) == NULL) {
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 425 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return; 426 return;
316 } 427 }
317 428
318 if (be_verbose > 1) 429 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename, 430 printf("%s: scanning file {%s,%s}\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class), 431 get_elfeitype(elf, EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 432 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose) 433 else if (be_verbose)
323 printf("%s: scanning file\n", filename); 434 printf("%s: scanning file\n", filename);
324 435
436 /* init output buffer */
437 if (!out_buffer) {
438 out_len = sizeof(char) * 80;
439 out_buffer = (char*)xmalloc(out_len);
440 }
441 *out_buffer = '\0';
442
325 /* show the header */ 443 /* show the header */
326 if (!be_quiet && show_banner) { 444 if (!be_quiet && show_banner) {
327 if (out_format) {
328 for (i=0; out_format[i]; ++i) { 445 for (i = 0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue; 446 if (out_format[i] != '%') continue;
330 447
331 switch (out_format[++i]) { 448 switch (out_format[++i]) {
332 case '%': break; 449 case '%': break;
450 case 'F': prints("FILE "); found_file = 1; break;
333 case 'F': printf("FILE "); break; 451 case 'o': prints(" TYPE "); break;
334 case 'x': printf(" PAX "); break; 452 case 'x': prints(" PAX "); break;
335 case 'e': printf("STK/REL "); break; 453 case 'e': prints("STK/REL "); break;
336 case 't': printf("TEXTREL "); break; 454 case 't': prints("TEXTREL "); break;
337 case 'r': printf("RPATH "); break; 455 case 'r': prints("RPATH "); break;
338 case 'n': printf("NEEDED "); break; 456 case 'n': prints("NEEDED "); break;
339 case 'i': printf("INTERP "); break; 457 case 'i': prints("INTERP "); break;
458 case 'b': prints("BIND "); break;
340 case 's': printf("SYM "); break; 459 case 's': prints("SYM "); break;
341 }
342 } 460 }
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 } 461 }
353 if (!found_file) printf(" FILE"); 462 if (!found_file) prints("FILE ");
354 printf("\n"); 463 prints("\n");
464 found_file = 0;
355 show_banner = 0; 465 show_banner = 0;
356 } 466 }
357 467
358 /* dump all the good stuff */ 468 /* 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) { 469 for (i = 0; out_format[i]; ++i) {
470 const char *out;
471
472 /* make sure we trim leading spaces in quiet mode */
473 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
474 *out_buffer = '\0';
475
364 if (out_format[i] != '%') { 476 if (out_format[i] != '%') {
365 printf("%c", out_format[i]); 477 xchrcat(&out_buffer, out_format[i], &out_len);
366 continue; 478 continue;
367 } 479 }
368 480
481 out = NULL;
369 switch (out_format[++i]) { 482 switch (out_format[++i]) {
370 case '%': printf("%%"); break; 483 case '%': xchrcat(&out_buffer, '%', &out_len); break;
371 case 'F': found_file = 1; printf("%s ", filename); break; 484 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
485 case 'o': out = get_elfetype(elf); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break; 486 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break; 487 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
374 case 't': scanelf_file_textrel(elf, &found_textrel); break; 488 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break; 489 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break; 490 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break; 491 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
492 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break; 493 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
379 } 494 }
380 } 495 if (out) xstrcat(&out_buffer, out, &out_len);
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 } 496 }
390 497
391 if (!found_file) { 498 if (!found_file) {
392 if (!be_quiet || found_pax || found_stack || found_textrel || \ 499 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym) 500 found_rpath || found_needed || found_interp || found_bind || \
394 puts(filename); 501 found_sym)
395 } else { 502 {
396 printf("\n"); 503 xchrcat(&out_buffer, ' ', &out_len);
504 xstrcat(&out_buffer, filename, &out_len);
397 } 505 }
506 }
507 if (!(be_quiet && xemptybuffer(out_buffer)))
508 puts(out_buffer);
398 509
399 unreadelf(elf); 510 unreadelf(elf);
400} 511}
401 512
402/* scan a directory for ET_EXEC files and print when we find one */ 513/* scan a directory for ET_EXEC files and print when we find one */
447 } 558 }
448 } 559 }
449 closedir(dir); 560 closedir(dir);
450} 561}
451 562
563static int scanelf_from_file(char *filename)
564{
565 FILE *fp = NULL;
566 char *p;
567 char path[_POSIX_PATH_MAX];
568
569 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
570 fp = stdin;
571 else if ((fp = fopen(filename, "r")) == NULL)
572 return 1;
573
574 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
575 if ((p = strchr(path, '\n')) != NULL)
576 *p = 0;
577 scanelf_dir(path);
578 }
579 if (fp != stdin)
580 fclose(fp);
581 return 0;
582}
583
584static void load_ld_so_conf()
585{
586 FILE *fp = NULL;
587 char *p;
588 char path[_POSIX_PATH_MAX];
589 int i = 0;
590
591 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
592 return;
593
594 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
595 if (*path != '/')
596 continue;
597
598 if ((p = strrchr(path, '\r')) != NULL)
599 *p = 0;
600 if ((p = strchr(path, '\n')) != NULL)
601 *p = 0;
602
603 ldpaths[i++] = xstrdup(path);
604
605 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
606 break;
607 }
608 ldpaths[i] = NULL;
609
610 fclose(fp);
611}
612
452/* scan /etc/ld.so.conf for paths */ 613/* scan /etc/ld.so.conf for paths */
453static void scanelf_ldpath() 614static void scanelf_ldpath()
454{ 615{
455 char scan_l, scan_ul, scan_ull; 616 char scan_l, scan_ul, scan_ull;
456 char *path, *p; 617 int i = 0;
457 FILE *fp;
458 618
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 619 if (!ldpaths[0])
460 err("Unable to open ld.so.conf: %s", strerror(errno)); 620 err("Unable to load any paths from ld.so.conf");
461 621
462 scan_l = scan_ul = scan_ull = 0; 622 scan_l = scan_ul = scan_ull = 0;
463 623
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 624 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; 625 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 626 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 627 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
477 scanelf_dir(path); 628 scanelf_dir(ldpaths[i]);
629 ++i;
478 } 630 }
479 free(path);
480 fclose(fp);
481 631
482 if (!scan_l) scanelf_dir("/lib"); 632 if (!scan_l) scanelf_dir("/lib");
483 if (!scan_ul) scanelf_dir("/usr/lib"); 633 if (!scan_ul) scanelf_dir("/usr/lib");
484 if (!scan_ull) scanelf_dir("/usr/local/lib"); 634 if (!scan_ull) scanelf_dir("/usr/local/lib");
485} 635}
490 char *path, *p; 640 char *path, *p;
491 641
492 path = getenv("PATH"); 642 path = getenv("PATH");
493 if (!path) 643 if (!path)
494 err("PATH is not set in your env !"); 644 err("PATH is not set in your env !");
495 645 path = xstrdup(path);
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498 646
499 while ((p = strrchr(path, ':')) != NULL) { 647 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1); 648 scanelf_dir(p + 1);
501 *p = 0; 649 *p = 0;
502 } 650 }
505} 653}
506 654
507 655
508 656
509/* usage / invocation handling functions */ 657/* usage / invocation handling functions */
510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV" 658#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV"
511#define a_argument required_argument 659#define a_argument required_argument
512static struct option const long_opts[] = { 660static struct option const long_opts[] = {
513 {"path", no_argument, NULL, 'p'}, 661 {"path", no_argument, NULL, 'p'},
514 {"ldpath", no_argument, NULL, 'l'}, 662 {"ldpath", no_argument, NULL, 'l'},
515 {"recursive", no_argument, NULL, 'R'}, 663 {"recursive", no_argument, NULL, 'R'},
519 {"header", no_argument, NULL, 'e'}, 667 {"header", no_argument, NULL, 'e'},
520 {"textrel", no_argument, NULL, 't'}, 668 {"textrel", no_argument, NULL, 't'},
521 {"rpath", no_argument, NULL, 'r'}, 669 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'}, 670 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'}, 671 {"interp", no_argument, NULL, 'i'},
672 {"bind", no_argument, NULL, 'b'},
524 {"symbol", a_argument, NULL, 's'}, 673 {"symbol", a_argument, NULL, 's'},
525 {"all", no_argument, NULL, 'a'}, 674 {"all", no_argument, NULL, 'a'},
526 {"quiet", no_argument, NULL, 'q'}, 675 {"quiet", no_argument, NULL, 'q'},
527 {"verbose", no_argument, NULL, 'v'}, 676 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'}, 677 {"format", a_argument, NULL, 'F'},
678 {"from", a_argument, NULL, 'f'},
529 {"file", a_argument, NULL, 'o'}, 679 {"file", a_argument, NULL, 'o'},
530 {"nobanner", no_argument, NULL, 'B'}, 680 {"nobanner", no_argument, NULL, 'B'},
531 {"help", no_argument, NULL, 'h'}, 681 {"help", no_argument, NULL, 'h'},
532 {"version", no_argument, NULL, 'V'}, 682 {"version", no_argument, NULL, 'V'},
533 {NULL, no_argument, NULL, 0x0} 683 {NULL, no_argument, NULL, 0x0}
542 "Print GNU_STACK markings", 692 "Print GNU_STACK markings",
543 "Print TEXTREL information", 693 "Print TEXTREL information",
544 "Print RPATH information", 694 "Print RPATH information",
545 "Print NEEDED information", 695 "Print NEEDED information",
546 "Print INTERP information", 696 "Print INTERP information",
697 "Print BIND information",
547 "Find a specified symbol", 698 "Find a specified symbol",
548 "Print all scanned info (-x -e -t -r)\n", 699 "Print all scanned info (-x -e -t -r -n -i)\n",
549 "Only output 'bad' things", 700 "Only output 'bad' things",
550 "Be verbose (can be specified more than once)", 701 "Be verbose (can be specified more than once)",
551 "Use specified format for output", 702 "Use specified format for output",
703 "Read input stream from a filename",
552 "Write output stream to a filename", 704 "Write output stream to a filename",
553 "Don't display the header", 705 "Don't display the header",
554 "Print this help and exit", 706 "Print this help and exit",
555 "Print version and exit", 707 "Print version and exit",
556 NULL 708 NULL
557}; 709};
558 710
559/* display usage and exit */ 711/* display usage and exit */
560static void usage(int status) 712static void usage(int status)
561{ 713{
562 int i; 714 unsigned long i;
563 printf(" Scan ELF binaries for stuff\n\n" 715 printf("* Scan ELF binaries for stuff\n\n"
564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 716 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
565 printf("Options: -[%s]\n", PARSE_FLAGS); 717 printf("Options: -[%s]\n", PARSE_FLAGS);
566 for (i = 0; long_opts[i].name; ++i) 718 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument) 719 if (long_opts[i].has_arg == no_argument)
568 printf(" -%c, --%-13s %s\n", long_opts[i].val, 720 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
569 long_opts[i].name, opts_help[i]); 721 long_opts[i].name, opts_help[i]);
570 else 722 else
571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 723 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val,
572 long_opts[i].name, opts_help[i]); 724 long_opts[i].name, opts_help[i]);
725
726 if (status != EXIT_SUCCESS)
727 exit(status);
728
729 puts("\nThe format modifiers for the -F option are:");
730 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO");
731 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED");
732 puts(" %i INTERP \t%b BIND \t%s symbol");
733
573 exit(status); 734 exit(status);
574} 735}
575 736
576/* parse command line arguments and preform needed actions */ 737/* parse command line arguments and preform needed actions */
577static void parseargs(int argc, char *argv[]) 738static void parseargs(int argc, char *argv[])
578{ 739{
579 int flag; 740 int i;
741 char *from_file = NULL;
580 742
581 opterr = 0; 743 opterr = 0;
582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 744 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
583 switch (flag) { 745 switch (i) {
584 746
585 case 'V': 747 case 'V':
586 printf("%s compiled %s\n%s\n" 748 printf("%s compiled %s\n%s\n"
587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 749 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
588 __FILE__, __DATE__, rcsid, argv0); 750 __FILE__, __DATE__, rcsid, argv0);
589 exit(EXIT_SUCCESS); 751 exit(EXIT_SUCCESS);
590 break; 752 break;
591 case 'h': usage(EXIT_SUCCESS); break; 753 case 'h': usage(EXIT_SUCCESS); break;
592 754 case 'f':
755 if (from_file == NULL)
756 from_file = xstrdup(optarg);
757 break;
593 case 'o': { 758 case 'o': {
594 FILE *fp = NULL; 759 FILE *fp = NULL;
595 fp = freopen(optarg, "w", stdout); 760 fp = freopen(optarg, "w", stdout);
596 if (fp == NULL) 761 if (fp == NULL)
597 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 762 err("Could not open output stream '%s': %s", optarg, strerror(errno));
599 break; 764 break;
600 } 765 }
601 766
602 case 's': { 767 case 's': {
603 size_t len; 768 size_t len;
604 find_sym = strdup(optarg); 769 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; 770 len = strlen(find_sym) + 1;
611 versioned_symname = (char *)malloc(sizeof(char) * (len+1)); 771 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); 772 sprintf(versioned_symname, "%s@", find_sym);
619 break; 773 break;
620 } 774 }
621 775
622 case 'F': { 776 case 'F': {
623 out_format = strdup(optarg); 777 out_format = xstrdup(optarg);
624 if (!out_format)
625 err("Could not malloc() mem for output format");
626 break; 778 break;
627 } 779 }
628 780
629 case 'y': scan_symlink = 0; break; 781 case 'y': scan_symlink = 0; break;
630 case 'B': show_banner = 0; break; 782 case 'B': show_banner = 0; break;
636 case 'e': show_stack = 1; break; 788 case 'e': show_stack = 1; break;
637 case 't': show_textrel = 1; break; 789 case 't': show_textrel = 1; break;
638 case 'r': show_rpath = 1; break; 790 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break; 791 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break; 792 case 'i': show_interp = 1; break;
793 case 'b': show_bind = 1; break;
641 case 'q': be_quiet = 1; break; 794 case 'q': be_quiet = 1; break;
642 case 'v': be_verbose = (be_verbose % 20) + 1; break; 795 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; 796 case 'a': show_pax = show_stack = show_textrel = show_rpath = \
797 show_needed = show_interp = show_bind = 1; break;
644 798
645 case ':': 799 case ':':
646 warn("Option missing parameter\n"); 800 err("Option missing parameter\n");
647 usage(EXIT_FAILURE);
648 break;
649 case '?': 801 case '?':
650 warn("Unknown option\n"); 802 err("Unknown option\n");
651 usage(EXIT_FAILURE);
652 break;
653 default: 803 default:
654 err("Unhandled option '%c'", flag); 804 err("Unhandled option '%c'", i);
655 break;
656 }
657 } 805 }
658 806 }
659 if (be_quiet && be_verbose)
660 err("You can be quiet or you can be verbose, not both, stupid");
661 807
662 /* let the format option override all other options */ 808 /* let the format option override all other options */
663 if (out_format) { 809 if (out_format) {
664 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0; 810 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0;
665 for (flag=0; out_format[flag]; ++flag) { 811 for (i = 0; out_format[i]; ++i) {
666 if (out_format[flag] != '%') continue; 812 if (out_format[i] != '%') continue;
667 813
668 switch (out_format[++flag]) { 814 switch (out_format[++i]) {
669 case '%': break; 815 case '%': break;
670 case 'F': break; 816 case 'F': break;
671 case 's': break; 817 case 's': break;
818 case 'o': break;
672 case 'x': show_pax = 1; break; 819 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break; 820 case 'e': show_stack = 1; break;
674 case 't': show_textrel = 1; break; 821 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break; 822 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break; 823 case 'n': show_needed = 1; break;
677 case 'i': show_interp = 1; break; 824 case 'i': show_interp = 1; break;
825 case 'b': show_bind = 1; break;
678 default: 826 default:
679 err("Invalid format specifier '%c' (byte %i)", 827 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1); 828 out_format[i], i+1);
681 } 829 }
682 } 830 }
831
832 /* construct our default format */
833 } else {
834 size_t fmt_len = 30;
835 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
836 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
837 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
838 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len);
839 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
840 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
841 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
842 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
843 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
844 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
845 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
683 } 846 }
847 if (be_verbose > 2) printf("Format: %s\n", out_format);
684 848
685 /* now lets actually do the scanning */ 849 /* now lets actually do the scanning */
850 if (scan_ldpath || (show_rpath && be_quiet))
851 load_ld_so_conf();
686 if (scan_ldpath) scanelf_ldpath(); 852 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath(); 853 if (scan_envpath) scanelf_envpath();
854 if (from_file) {
855 scanelf_from_file(from_file);
856 free(from_file);
857 from_file = *argv;
858 }
688 if (optind == argc && !scan_ldpath && !scan_envpath) 859 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
689 err("Nothing to scan !?"); 860 err("Nothing to scan !?");
690 while (optind < argc) 861 while (optind < argc)
691 scanelf_dir(argv[optind++]); 862 scanelf_dir(argv[optind++]);
692 863
693 /* clean up */ 864 /* clean up */
694 if (find_sym) { 865 if (find_sym) {
695 free(find_sym); 866 free(find_sym);
696 free(versioned_symname); 867 free(versioned_symname);
697 } 868 }
698 if (out_format) free(out_format); 869 if (out_format) free(out_format);
870 for (i = 0; ldpaths[i]; ++i)
871 free(ldpaths[i]);
872}
873
874
875
876/* utility funcs */
877static char *xstrdup(char *s)
878{
879 char *ret = strdup(s);
880 if (!ret) err("Could not strdup(): %s", strerror(errno));
881 return ret;
882}
883static void *xmalloc(size_t size)
884{
885 void *ret = malloc(size);
886 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
887 return ret;
888}
889static void xstrcat(char **dst, const char *src, size_t *curr_len)
890{
891 long new_len;
892
893 new_len = strlen(*dst) + strlen(src);
894 if (*curr_len <= new_len) {
895 *curr_len = new_len + (*curr_len / 2);
896 *dst = realloc(*dst, *curr_len);
897 if (!*dst)
898 err("could not realloc %li bytes", (unsigned long)*curr_len);
899 }
900
901 strcat(*dst, src);
902}
903static inline void xchrcat(char **dst, const char append, size_t *curr_len)
904{
905 static char my_app[2];
906 my_app[0] = append;
907 my_app[1] = '\0';
908 xstrcat(dst, my_app, curr_len);
909}
910static int xemptybuffer(const char *buff)
911{
912 long i;
913 for (i = 0; buff[i]; ++i)
914 if (buff[i] != ' ')
915 return 0;
916 return 1;
699} 917}
700 918
701 919
702 920
703int main(int argc, char *argv[]) 921int main(int argc, char *argv[])

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