/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.40 Revision 1.50
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 1.50 2005/05/18 04:10:14 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 1.50 2005/05/18 04:10:14 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);
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
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 fstat(elf->fd, &s);
342 if (be_quiet && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
343 return NULL;
344 } else {
345 *found_bind = 1;
346 return "LAZY";
347 }
348}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 349static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
243{ 350{
244 int i; 351 unsigned long i;
245 void *symtab_void, *strtab_void; 352 void *symtab_void, *strtab_void;
246 353
247 if (!find_sym) return; 354 if (!find_sym) return NULL;
248 355
249 symtab_void = elf_findsecbyname(elf, ".symtab"); 356 symtab_void = elf_findsecbyname(elf, ".symtab");
250 strtab_void = elf_findsecbyname(elf, ".strtab"); 357 strtab_void = elf_findsecbyname(elf, ".strtab");
251 358
252 if (symtab_void && strtab_void) { 359 if (symtab_void && strtab_void) {
253#define FIND_SYM(B) \ 360#define FIND_SYM(B) \
254 if (elf->elf_class == ELFCLASS ## B) { \ 361 if (elf->elf_class == ELFCLASS ## B) { \
255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 362 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 363 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
257 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 364 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
258 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 365 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
259 char *symname; \ 366 char *symname; \
260 for (i = 0; i < cnt; ++i) { \ 367 for (i = 0; i < cnt; ++i) { \
261 if (sym->st_name) { \ 368 if (sym->st_name) { \
262 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 369 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
263 if (*find_sym == '*') { \ 370 if (*find_sym == '*') { \
275 ++sym; \ 382 ++sym; \
276 } } 383 } }
277 FIND_SYM(32) 384 FIND_SYM(32)
278 FIND_SYM(64) 385 FIND_SYM(64)
279 } 386 }
280 if (*find_sym != '*') { 387 if (*find_sym != '*' && *found_sym)
281 if (*found_sym) 388 return find_sym;
282 printf(" %s ", find_sym);
283 else if (!be_quiet) 389 if (be_quiet)
284 printf(" - "); 390 return NULL;
285 } 391 else
392 return " - ";
286} 393}
287/* scan an elf file and show all the fun stuff */ 394/* scan an elf file and show all the fun stuff */
395#define prints(str) fputs(str, stdout)
288static void scanelf_file(const char *filename) 396static void scanelf_file(const char *filename)
289{ 397{
290 int i; 398 unsigned long i;
291 char found_pax, found_stack, found_relro, found_textrel, 399 char found_pax, found_stack, found_relro, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym, 400 found_rpath, found_needed, found_interp, found_bind,
293 found_file; 401 found_sym, found_file;
294 elfobj *elf; 402 elfobj *elf;
295 struct stat st; 403 struct stat st;
404 static char *out_buffer = NULL;
405 static size_t out_len;
296 406
297 /* make sure 'filename' exists */ 407 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) { 408 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename); 409 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return; 410 return;
304 if (be_verbose > 2) printf("%s: skipping non-file\n", filename); 414 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
305 return; 415 return;
306 } 416 }
307 417
308 found_pax = found_stack = found_relro = found_textrel = \ 418 found_pax = found_stack = found_relro = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \ 419 found_rpath = found_needed = found_interp = found_bind = \
310 found_file = 0; 420 found_sym = found_file = 0;
311 421
312 /* verify this is real ELF */ 422 /* verify this is real ELF */
313 if ((elf = readelf(filename)) == NULL) { 423 if ((elf = readelf(filename)) == NULL) {
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 424 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return; 425 return;
316 } 426 }
317 427
318 if (be_verbose > 1) 428 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename, 429 printf("%s: scanning file {%s,%s}\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class), 430 get_elfeitype(elf, EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 431 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose) 432 else if (be_verbose)
323 printf("%s: scanning file\n", filename); 433 printf("%s: scanning file\n", filename);
324 434
435 /* init output buffer */
436 if (!out_buffer) {
437 out_len = sizeof(char) * 80;
438 out_buffer = (char*)xmalloc(out_len);
439 }
440 *out_buffer = '\0';
441
325 /* show the header */ 442 /* show the header */
326 if (!be_quiet && show_banner) { 443 if (!be_quiet && show_banner) {
327 if (out_format) {
328 for (i=0; out_format[i]; ++i) { 444 for (i = 0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue; 445 if (out_format[i] != '%') continue;
330 446
331 switch (out_format[++i]) { 447 switch (out_format[++i]) {
332 case '%': break; 448 case '%': break;
449 case 'F': prints("FILE "); found_file = 1; break;
333 case 'F': printf("FILE "); break; 450 case 'o': prints(" TYPE "); break;
334 case 'x': printf(" PAX "); break; 451 case 'x': prints(" PAX "); break;
335 case 'e': printf("STK/REL "); break; 452 case 'e': prints("STK/REL "); break;
336 case 't': printf("TEXTREL "); break; 453 case 't': prints("TEXTREL "); break;
337 case 'r': printf("RPATH "); break; 454 case 'r': prints("RPATH "); break;
338 case 'n': printf("NEEDED "); break; 455 case 'n': prints("NEEDED "); break;
339 case 'i': printf("INTERP "); break; 456 case 'i': prints("INTERP "); break;
457 case 'b': prints("BIND "); break;
340 case 's': printf("SYM "); break; 458 case 's': prints("SYM "); break;
341 }
342 } 459 }
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 } 460 }
353 if (!found_file) printf(" FILE"); 461 if (!found_file) prints("FILE ");
354 printf("\n"); 462 prints("\n");
463 found_file = 0;
355 show_banner = 0; 464 show_banner = 0;
356 } 465 }
357 466
358 /* dump all the good stuff */ 467 /* 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) { 468 for (i = 0; out_format[i]; ++i) {
469 const char *out;
470
471 /* make sure we trim leading spaces in quiet mode */
472 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
473 *out_buffer = '\0';
474
364 if (out_format[i] != '%') { 475 if (out_format[i] != '%') {
365 printf("%c", out_format[i]); 476 xchrcat(&out_buffer, out_format[i], &out_len);
366 continue; 477 continue;
367 } 478 }
368 479
480 out = NULL;
369 switch (out_format[++i]) { 481 switch (out_format[++i]) {
370 case '%': printf("%%"); break; 482 case '%': xchrcat(&out_buffer, '%', &out_len); break;
371 case 'F': found_file = 1; printf("%s ", filename); break; 483 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
484 case 'o': out = get_elfetype(elf); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break; 485 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break; 486 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
374 case 't': scanelf_file_textrel(elf, &found_textrel); break; 487 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break; 488 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break; 489 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break; 490 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
491 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break; 492 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
379 } 493 }
380 } 494 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 } 495 }
390 496
391 if (!found_file) { 497 if (!found_file) {
392 if (!be_quiet || found_pax || found_stack || found_textrel || \ 498 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym) 499 found_rpath || found_needed || found_interp || found_bind || \
394 puts(filename); 500 found_sym)
395 } else { 501 {
396 printf("\n"); 502 xchrcat(&out_buffer, ' ', &out_len);
503 xstrcat(&out_buffer, filename, &out_len);
397 } 504 }
505 }
506 if (!(be_quiet && xemptybuffer(out_buffer)))
507 puts(out_buffer);
398 508
399 unreadelf(elf); 509 unreadelf(elf);
400} 510}
401 511
402/* scan a directory for ET_EXEC files and print when we find one */ 512/* scan a directory for ET_EXEC files and print when we find one */
447 } 557 }
448 } 558 }
449 closedir(dir); 559 closedir(dir);
450} 560}
451 561
562static int scanelf_from_file(char *filename)
563{
564 FILE *fp = NULL;
565 char *p;
566 char path[_POSIX_PATH_MAX];
567
568 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
569 fp = stdin;
570 else if ((fp = fopen(filename, "r")) == NULL)
571 return 1;
572
573 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
574 if ((p = strchr(path, '\n')) != NULL)
575 *p = 0;
576 scanelf_dir(path);
577 }
578 if (fp != stdin)
579 fclose(fp);
580 return 0;
581}
582
583static void load_ld_so_conf()
584{
585 FILE *fp = NULL;
586 char *p;
587 char path[_POSIX_PATH_MAX];
588 int i = 0;
589
590 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
591 return;
592
593 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
594 if (*path != '/')
595 continue;
596
597 if ((p = strrchr(path, '\r')) != NULL)
598 *p = 0;
599 if ((p = strchr(path, '\n')) != NULL)
600 *p = 0;
601
602 ldpaths[i++] = xstrdup(path);
603
604 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
605 break;
606 }
607 ldpaths[i] = NULL;
608
609 fclose(fp);
610}
611
452/* scan /etc/ld.so.conf for paths */ 612/* scan /etc/ld.so.conf for paths */
453static void scanelf_ldpath() 613static void scanelf_ldpath()
454{ 614{
455 char scan_l, scan_ul, scan_ull; 615 char scan_l, scan_ul, scan_ull;
456 char *path, *p; 616 int i = 0;
457 FILE *fp;
458 617
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 618 if (!ldpaths[0])
460 err("Unable to open ld.so.conf: %s", strerror(errno)); 619 err("Unable to load any paths from ld.so.conf");
461 620
462 scan_l = scan_ul = scan_ull = 0; 621 scan_l = scan_ul = scan_ull = 0;
463 622
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 623 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; 624 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 625 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 626 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
477 scanelf_dir(path); 627 scanelf_dir(ldpaths[i]);
628 ++i;
478 } 629 }
479 free(path);
480 fclose(fp);
481 630
482 if (!scan_l) scanelf_dir("/lib"); 631 if (!scan_l) scanelf_dir("/lib");
483 if (!scan_ul) scanelf_dir("/usr/lib"); 632 if (!scan_ul) scanelf_dir("/usr/lib");
484 if (!scan_ull) scanelf_dir("/usr/local/lib"); 633 if (!scan_ull) scanelf_dir("/usr/local/lib");
485} 634}
490 char *path, *p; 639 char *path, *p;
491 640
492 path = getenv("PATH"); 641 path = getenv("PATH");
493 if (!path) 642 if (!path)
494 err("PATH is not set in your env !"); 643 err("PATH is not set in your env !");
495 644 path = xstrdup(path);
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498 645
499 while ((p = strrchr(path, ':')) != NULL) { 646 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1); 647 scanelf_dir(p + 1);
501 *p = 0; 648 *p = 0;
502 } 649 }
505} 652}
506 653
507 654
508 655
509/* usage / invocation handling functions */ 656/* usage / invocation handling functions */
510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV" 657#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV"
511#define a_argument required_argument 658#define a_argument required_argument
512static struct option const long_opts[] = { 659static struct option const long_opts[] = {
513 {"path", no_argument, NULL, 'p'}, 660 {"path", no_argument, NULL, 'p'},
514 {"ldpath", no_argument, NULL, 'l'}, 661 {"ldpath", no_argument, NULL, 'l'},
515 {"recursive", no_argument, NULL, 'R'}, 662 {"recursive", no_argument, NULL, 'R'},
519 {"header", no_argument, NULL, 'e'}, 666 {"header", no_argument, NULL, 'e'},
520 {"textrel", no_argument, NULL, 't'}, 667 {"textrel", no_argument, NULL, 't'},
521 {"rpath", no_argument, NULL, 'r'}, 668 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'}, 669 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'}, 670 {"interp", no_argument, NULL, 'i'},
671 {"bind", no_argument, NULL, 'b'},
524 {"symbol", a_argument, NULL, 's'}, 672 {"symbol", a_argument, NULL, 's'},
525 {"all", no_argument, NULL, 'a'}, 673 {"all", no_argument, NULL, 'a'},
526 {"quiet", no_argument, NULL, 'q'}, 674 {"quiet", no_argument, NULL, 'q'},
527 {"verbose", no_argument, NULL, 'v'}, 675 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'}, 676 {"format", a_argument, NULL, 'F'},
677 {"from", a_argument, NULL, 'f'},
529 {"file", a_argument, NULL, 'o'}, 678 {"file", a_argument, NULL, 'o'},
530 {"nobanner", no_argument, NULL, 'B'}, 679 {"nobanner", no_argument, NULL, 'B'},
531 {"help", no_argument, NULL, 'h'}, 680 {"help", no_argument, NULL, 'h'},
532 {"version", no_argument, NULL, 'V'}, 681 {"version", no_argument, NULL, 'V'},
533 {NULL, no_argument, NULL, 0x0} 682 {NULL, no_argument, NULL, 0x0}
542 "Print GNU_STACK markings", 691 "Print GNU_STACK markings",
543 "Print TEXTREL information", 692 "Print TEXTREL information",
544 "Print RPATH information", 693 "Print RPATH information",
545 "Print NEEDED information", 694 "Print NEEDED information",
546 "Print INTERP information", 695 "Print INTERP information",
696 "Print BIND information",
547 "Find a specified symbol", 697 "Find a specified symbol",
548 "Print all scanned info (-x -e -t -r)\n", 698 "Print all scanned info (-x -e -t -r -n -i)\n",
549 "Only output 'bad' things", 699 "Only output 'bad' things",
550 "Be verbose (can be specified more than once)", 700 "Be verbose (can be specified more than once)",
551 "Use specified format for output", 701 "Use specified format for output",
702 "Read input stream from a filename",
552 "Write output stream to a filename", 703 "Write output stream to a filename",
553 "Don't display the header", 704 "Don't display the header",
554 "Print this help and exit", 705 "Print this help and exit",
555 "Print version and exit", 706 "Print version and exit",
556 NULL 707 NULL
557}; 708};
558 709
559/* display usage and exit */ 710/* display usage and exit */
560static void usage(int status) 711static void usage(int status)
561{ 712{
562 int i; 713 unsigned long i;
563 printf(" Scan ELF binaries for stuff\n\n" 714 printf(" Scan ELF binaries for stuff\n\n"
564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 715 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
565 printf("Options: -[%s]\n", PARSE_FLAGS); 716 printf("Options: -[%s]\n", PARSE_FLAGS);
566 for (i = 0; long_opts[i].name; ++i) 717 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument) 718 if (long_opts[i].has_arg == no_argument)
568 printf(" -%c, --%-13s %s\n", long_opts[i].val, 719 printf(" -%c, --%-13s %s\n", long_opts[i].val,
569 long_opts[i].name, opts_help[i]); 720 long_opts[i].name, opts_help[i]);
570 else 721 else
571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 722 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val,
572 long_opts[i].name, opts_help[i]); 723 long_opts[i].name, opts_help[i]);
724
725 if (status != EXIT_SUCCESS)
726 exit(status);
727
728 puts("\nThe format modifiers for the -F option are:");
729 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO");
730 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED");
731 puts(" %i INTERP \t%b BIND \t%s symbol");
732
573 exit(status); 733 exit(status);
574} 734}
575 735
576/* parse command line arguments and preform needed actions */ 736/* parse command line arguments and preform needed actions */
577static void parseargs(int argc, char *argv[]) 737static void parseargs(int argc, char *argv[])
578{ 738{
579 int flag; 739 int i;
740 char *from_file = NULL;
580 741
581 opterr = 0; 742 opterr = 0;
582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 743 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
583 switch (flag) { 744 switch (i) {
584 745
585 case 'V': 746 case 'V':
586 printf("%s compiled %s\n%s\n" 747 printf("%s compiled %s\n%s\n"
587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 748 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
588 __FILE__, __DATE__, rcsid, argv0); 749 __FILE__, __DATE__, rcsid, argv0);
589 exit(EXIT_SUCCESS); 750 exit(EXIT_SUCCESS);
590 break; 751 break;
591 case 'h': usage(EXIT_SUCCESS); break; 752 case 'h': usage(EXIT_SUCCESS); break;
592 753 case 'f':
754 if (from_file == NULL)
755 from_file = xstrdup(optarg);
756 break;
593 case 'o': { 757 case 'o': {
594 FILE *fp = NULL; 758 FILE *fp = NULL;
595 fp = freopen(optarg, "w", stdout); 759 fp = freopen(optarg, "w", stdout);
596 if (fp == NULL) 760 if (fp == NULL)
597 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 761 err("Could not open output stream '%s': %s", optarg, strerror(errno));
599 break; 763 break;
600 } 764 }
601 765
602 case 's': { 766 case 's': {
603 size_t len; 767 size_t len;
604 find_sym = strdup(optarg); 768 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; 769 len = strlen(find_sym) + 1;
611 versioned_symname = (char *)malloc(sizeof(char) * (len+1)); 770 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); 771 sprintf(versioned_symname, "%s@", find_sym);
619 break; 772 break;
620 } 773 }
621 774
622 case 'F': { 775 case 'F': {
623 out_format = strdup(optarg); 776 out_format = xstrdup(optarg);
624 if (!out_format)
625 err("Could not malloc() mem for output format");
626 break; 777 break;
627 } 778 }
628 779
629 case 'y': scan_symlink = 0; break; 780 case 'y': scan_symlink = 0; break;
630 case 'B': show_banner = 0; break; 781 case 'B': show_banner = 0; break;
636 case 'e': show_stack = 1; break; 787 case 'e': show_stack = 1; break;
637 case 't': show_textrel = 1; break; 788 case 't': show_textrel = 1; break;
638 case 'r': show_rpath = 1; break; 789 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break; 790 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break; 791 case 'i': show_interp = 1; break;
792 case 'b': show_bind = 1; break;
641 case 'q': be_quiet = 1; break; 793 case 'q': be_quiet = 1; break;
642 case 'v': be_verbose = (be_verbose % 20) + 1; break; 794 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; 795 case 'a': show_pax = show_stack = show_textrel = show_rpath = \
796 show_needed = show_interp = show_bind = 1; break;
644 797
645 case ':': 798 case ':':
646 warn("Option missing parameter\n"); 799 err("Option missing parameter\n");
647 usage(EXIT_FAILURE);
648 break;
649 case '?': 800 case '?':
650 warn("Unknown option\n"); 801 err("Unknown option\n");
651 usage(EXIT_FAILURE);
652 break;
653 default: 802 default:
654 err("Unhandled option '%c'", flag); 803 err("Unhandled option '%c'", i);
655 break;
656 }
657 } 804 }
658 805 }
659 if (be_quiet && be_verbose)
660 err("You can be quiet or you can be verbose, not both, stupid");
661 806
662 /* let the format option override all other options */ 807 /* let the format option override all other options */
663 if (out_format) { 808 if (out_format) {
664 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0; 809 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0;
665 for (flag=0; out_format[flag]; ++flag) { 810 for (i = 0; out_format[i]; ++i) {
666 if (out_format[flag] != '%') continue; 811 if (out_format[i] != '%') continue;
667 812
668 switch (out_format[++flag]) { 813 switch (out_format[++i]) {
669 case '%': break; 814 case '%': break;
670 case 'F': break; 815 case 'F': break;
671 case 's': break; 816 case 's': break;
817 case 'o': break;
672 case 'x': show_pax = 1; break; 818 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break; 819 case 'e': show_stack = 1; break;
674 case 't': show_textrel = 1; break; 820 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break; 821 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break; 822 case 'n': show_needed = 1; break;
677 case 'i': show_interp = 1; break; 823 case 'i': show_interp = 1; break;
824 case 'b': show_bind = 1; break;
678 default: 825 default:
679 err("Invalid format specifier '%c' (byte %i)", 826 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1); 827 out_format[i], i+1);
681 } 828 }
682 } 829 }
830
831 /* construct our default format */
832 } else {
833 size_t fmt_len = 30;
834 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
835 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
836 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
837 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len);
838 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
839 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
840 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
841 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
842 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
843 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
844 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
683 } 845 }
846 if (be_verbose > 2) printf("Format: %s\n", out_format);
684 847
685 /* now lets actually do the scanning */ 848 /* now lets actually do the scanning */
849 if (scan_ldpath || (show_rpath && be_quiet))
850 load_ld_so_conf();
686 if (scan_ldpath) scanelf_ldpath(); 851 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath(); 852 if (scan_envpath) scanelf_envpath();
853 if (from_file) {
854 scanelf_from_file(from_file);
855 free(from_file);
856 from_file = *argv;
857 }
688 if (optind == argc && !scan_ldpath && !scan_envpath) 858 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
689 err("Nothing to scan !?"); 859 err("Nothing to scan !?");
690 while (optind < argc) 860 while (optind < argc)
691 scanelf_dir(argv[optind++]); 861 scanelf_dir(argv[optind++]);
692 862
693 /* clean up */ 863 /* clean up */
694 if (find_sym) { 864 if (find_sym) {
695 free(find_sym); 865 free(find_sym);
696 free(versioned_symname); 866 free(versioned_symname);
697 } 867 }
698 if (out_format) free(out_format); 868 if (out_format) free(out_format);
869 for (i = 0; ldpaths[i]; ++i)
870 free(ldpaths[i]);
871}
872
873
874
875/* utility funcs */
876static char *xstrdup(char *s)
877{
878 char *ret = strdup(s);
879 if (!ret) err("Could not strdup(): %s", strerror(errno));
880 return ret;
881}
882static void *xmalloc(size_t size)
883{
884 void *ret = malloc(size);
885 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
886 return ret;
887}
888static void xstrcat(char **dst, const char *src, size_t *curr_len)
889{
890 long new_len;
891
892 new_len = strlen(*dst) + strlen(src);
893 if (*curr_len <= new_len) {
894 *curr_len = new_len + (*curr_len / 2);
895 *dst = realloc(*dst, *curr_len);
896 if (!*dst)
897 err("could not realloc %li bytes", (unsigned long)*curr_len);
898 }
899
900 strcat(*dst, src);
901}
902static inline void xchrcat(char **dst, const char append, size_t *curr_len)
903{
904 static char my_app[2];
905 my_app[0] = append;
906 my_app[1] = '\0';
907 xstrcat(dst, my_app, curr_len);
908}
909static int xemptybuffer(const char *buff)
910{
911 long i;
912 for (i = 0; buff[i]; ++i)
913 if (buff[i] != ' ')
914 return 0;
915 return 1;
699} 916}
700 917
701 918
702 919
703int main(int argc, char *argv[]) 920int main(int argc, char *argv[])

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