/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.35 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 1.35 2005/04/14 00:17:30 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 1.35 2005/04/14 00:17:30 solar Exp $"; 38static const char *rcsid = "$Id: scanelf.c,v 1.50 2005/05/18 04:10:14 vapier Exp $";
39 39#define argv0 "scanelf"
40
41/* helper functions for showing errors */
42#define argv0 "scanelf" /*((*argv != NULL) ? argv[0] : __FILE__ "\b\b")*/
43#define warn(fmt, args...) \
44 fprintf(stderr, "%s: " fmt "\n", argv0, ## args)
45#define warnf(fmt, args...) warn("%s(): " fmt, __FUNCTION__, ## args)
46#define err(fmt, args...) \
47 do { \
48 warn(fmt, ## args); \
49 exit(EXIT_FAILURE); \
50 } while (0)
51 40
52 41
53 42
54/* prototypes */ 43/* prototypes */
55static void scanelf_file(const char *filename); 44static void scanelf_file(const char *filename);
56static void scanelf_dir(const char *path); 45static void scanelf_dir(const char *path);
57static void scanelf_ldpath(); 46static void scanelf_ldpath();
58static void scanelf_envpath(); 47static void scanelf_envpath();
59static void usage(int status); 48static void usage(int status);
60static 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);
61 55
62/* variables to control behavior */ 56/* variables to control behavior */
57static char *ldpaths[256];
63static char scan_ldpath = 0; 58static char scan_ldpath = 0;
64static char scan_envpath = 0; 59static char scan_envpath = 0;
60static char scan_symlink = 1;
65static char dir_recurse = 0; 61static char dir_recurse = 0;
66static char dir_crossmount = 1; 62static char dir_crossmount = 1;
67static char show_pax = 0; 63static char show_pax = 0;
68static char show_stack = 0; 64static char show_stack = 0;
69static char show_textrel = 0; 65static char show_textrel = 0;
70static char show_rpath = 0; 66static char show_rpath = 0;
71static char show_needed = 0; 67static char show_needed = 0;
68static char show_interp = 0;
69static char show_bind = 0;
72static char show_banner = 1; 70static char show_banner = 1;
73static char be_quiet = 0; 71static char be_quiet = 0;
74static char be_verbose = 0; 72static char be_verbose = 0;
73static char *find_sym = NULL, *versioned_symname = NULL;
75static char *find_sym = NULL; 74static char *out_format = NULL;
76 75
77 76
78 77
79/* scan an elf file and show all the fun stuff */ 78/* sub-funcs for scanelf_file() */
80static void scanelf_file(const char *filename) 79static char *scanelf_file_pax(elfobj *elf, char *found_pax)
81{ 80{
82 int i; 81 static char *paxflags;
83 char found_pax, found_stack, found_relro, found_textrel,
84 found_rpath, found_needed, found_sym;
85 elfobj *elf;
86 struct stat st;
87 82
88 /* make sure path exists */ 83 if (!show_pax) return NULL;
89 if (lstat(filename, &st) == -1)
90 return;
91 if (!S_ISREG(st.st_mode))
92 return;
93 found_pax = found_stack = found_relro = found_textrel = \
94 found_rpath = found_needed = found_sym = 0;
95 84
96 /* verify this is real ELF */
97 if ((elf = readelf(filename)) == NULL) {
98 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
99 return;
100 }
101
102 if (be_verbose > 1)
103 printf("%s: {%s,%s} scanning file\n", filename,
104 get_elfeitype(elf, EI_CLASS, elf->elf_class),
105 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
106 else if (be_verbose)
107 printf("%s: scanning file\n", filename);
108
109 /* show the header */
110 if (!be_quiet && show_banner) {
111 printf(" TYPE ");
112 if (show_pax) printf(" PAX ");
113 if (show_stack) printf("STK/REL ");
114 if (show_textrel) printf("TEXTREL ");
115 if (show_rpath) printf("RPATH ");
116 if (show_needed) printf("NEEDED ");
117 printf(" FILE\n");
118 show_banner = 0;
119 }
120
121 /* dump all the good stuff */
122 if (!be_quiet)
123 printf("%-7s ", get_elfetype(elf));
124
125 if (show_pax) {
126 char *paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 85 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
127 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 86 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
128 found_pax = 1; 87 *found_pax = 1;
129 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 88 return paxflags;
130 } 89 }
131 }
132 90
133 /* stack fun */ 91 return NULL;
134 if (show_stack) { 92}
93static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
94{
95 static char ret[8];
96 char *found;
97 unsigned long i, off, shown;
98
99 if (!show_stack) return NULL;
100
101 shown = 0;
102 strcpy(ret, "--- ---");
103
104 if (elf->phdr) {
135#define SHOW_STACK(B) \ 105#define SHOW_STACK(B) \
136 if (elf->elf_class == ELFCLASS ## B) { \ 106 if (elf->elf_class == ELFCLASS ## B) { \
137 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 107 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
138 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 108 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
139 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 109 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
140 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 110 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
141 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 111 found = found_stack; \
112 off = 0; \
113 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
114 found = found_relro; \
115 off = 3; \
116 } else \
117 continue; \
142 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 118 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
143 continue; \ 119 continue; \
144 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \ 120 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
145 found_stack = 1; \ 121 *found = 1; \
146 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \ 122 ++shown; \
123 } \
124 }
125 SHOW_STACK(32)
126 SHOW_STACK(64)
127 }
128
129 if (be_quiet && !shown)
130 return NULL;
131 else
132 return ret;
133}
134static char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
135{
136 static char *ret = "TEXTREL";
137 unsigned long i;
138
139 if (!show_textrel) return NULL;
140
141 if (elf->phdr) {
142#define SHOW_TEXTREL(B) \
143 if (elf->elf_class == ELFCLASS ## B) { \
144 Elf ## B ## _Dyn *dyn; \
145 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
146 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
147 Elf ## B ## _Off offset; \
148 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
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; \
152 dyn = DYN ## B (elf->data + offset); \
153 while (EGET(dyn->d_tag) != DT_NULL) { \
154 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
147 found_relro = 1; \ 155 *found_textrel = 1; \
148 printf("%s ", gnu_short_stack_flags(EGET(phdr[i].p_flags))); \ 156 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
157 return ret; \
158 } \
159 ++dyn; \
149 } \ 160 } \
150 }
151 SHOW_STACK(32)
152 SHOW_STACK(64)
153 if (!be_quiet && !found_stack) printf("--- ");
154 if (!be_quiet && !found_relro) printf("--- ");
155 }
156
157 /* textrel fun */
158 if (show_textrel) {
159#define SHOW_TEXTREL(B) \
160 if (elf->elf_class == ELFCLASS ## B) { \
161 Elf ## B ## _Dyn *dyn; \
162 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
163 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
164 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
165 if (phdr[i].p_type != PT_DYNAMIC) continue; \
166 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
167 while (EGET(dyn->d_tag) != DT_NULL) { \
168 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
169 found_textrel = 1; \
170 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
171 fputs("TEXTREL ", stdout); \
172 } \
173 ++dyn; \
174 } \
175 } } 161 } }
176 SHOW_TEXTREL(32) 162 SHOW_TEXTREL(32)
177 SHOW_TEXTREL(64) 163 SHOW_TEXTREL(64)
178 if (!be_quiet && !found_textrel) fputs("------- ", stdout);
179 } 164 }
180 165
181 /* rpath fun */ 166 if (be_quiet)
182 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 167 return NULL;
183 if (show_rpath) { 168 else
169 return " - ";
170}
171static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
172{
173 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
174 unsigned long i, s;
184 char *rpath, *runpath; 175 char *rpath, *runpath, **r;
176 void *strtbl_void;
177
178 if (!show_rpath) return;
179
185 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 180 strtbl_void = elf_findsecbyname(elf, ".dynstr");
186 rpath = runpath = NULL; 181 rpath = runpath = NULL;
187 182
188 if (strtbl_void) { 183 if (elf->phdr && strtbl_void) {
189#define SHOW_RPATH(B) \ 184#define SHOW_RPATH(B) \
190 if (elf->elf_class == ELFCLASS ## B) { \ 185 if (elf->elf_class == ELFCLASS ## B) { \
191 Elf ## B ## _Dyn *dyn; \ 186 Elf ## B ## _Dyn *dyn; \
192 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 187 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
193 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 188 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
194 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 */ \
195 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 193 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
194 /* Just scan dynamic headers */ \
196 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 */ \
197 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 199 dyn = DYN ## B (elf->data + offset); \
198 while (EGET(dyn->d_tag) != DT_NULL) { \ 200 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
199 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 */ \
200 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 } \
201 found_rpath = 1; \ 221 if (*r) *found_rpath = 1; \
202 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \
203 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 found_rpath = 1; \
205 } \ 222 } \
206 ++dyn; \ 223 ++dyn; \
207 } \ 224 } \
208 } } 225 } }
209 SHOW_RPATH(32) 226 SHOW_RPATH(32)
210 SHOW_RPATH(64) 227 SHOW_RPATH(64)
211 } 228 }
229
212 if (rpath && runpath) { 230 if (rpath && runpath) {
213 if (!strcmp(rpath, runpath)) 231 if (!strcmp(rpath, runpath)) {
214 printf("%-5s ", runpath); 232 xstrcat(ret, runpath, ret_len);
215 else { 233 } else {
216 fprintf(stderr, "%s's RPATH [%s] != RUNPATH [%s]\n", filename, rpath, runpath); 234 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
217 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);
218 } 240 }
219 } else if (rpath || runpath) 241 } else if (rpath || runpath)
220 printf("%-5s ", (runpath ? runpath : rpath)); 242 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
221 else if (!be_quiet && !found_rpath) 243 else if (!be_quiet)
222 printf(" - "); 244 xstrcat(ret, " - ", ret_len);
223 } 245}
224 246static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len)
225 /* print out all the NEEDED entries */ 247{
226 if (show_needed) { 248 unsigned long i;
227 char *needed; 249 char *needed;
250 void *strtbl_void;
251
252 if (!show_needed) return;
253
228 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 254 strtbl_void = elf_findsecbyname(elf, ".dynstr");
229 255
230 if (strtbl_void) { 256 if (elf->phdr && strtbl_void) {
231#define SHOW_NEEDED(B) \ 257#define SHOW_NEEDED(B) \
232 if (elf->elf_class == ELFCLASS ## B) { \ 258 if (elf->elf_class == ELFCLASS ## B) { \
233 Elf ## B ## _Dyn *dyn; \ 259 Elf ## B ## _Dyn *dyn; \
234 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 260 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 261 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
236 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 262 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
263 Elf ## B ## _Off offset; \
237 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 264 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
238 if (be_verbose && EGET(phdr[i].p_type) == PT_INTERP) { \
239 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
240 printf("%s\n", elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr)); \
241 exit(0); \
242 } \
243 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; \
244 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 268 dyn = DYN ## B (elf->data + offset); \
245 while (EGET(dyn->d_tag) != DT_NULL) { \ 269 while (EGET(dyn->d_tag) != DT_NULL) { \
246 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 270 if (EGET(dyn->d_tag) == DT_NEEDED) { \
247 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); \
248 if (found_needed) printf(","); \ 272 if (offset >= elf->len) { \
249 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); \
250 found_needed = 1; \ 279 *found_needed = 1; \
251 } \ 280 } \
252 ++dyn; \ 281 ++dyn; \
253 } \ 282 } \
254 } } 283 } }
255 SHOW_NEEDED(32) 284 SHOW_NEEDED(32)
256 SHOW_NEEDED(64) 285 SHOW_NEEDED(64)
257 } 286 }
258 if (!be_quiet && !found_needed) 287}
259 printf(" - "); 288static char *scanelf_file_interp(elfobj *elf, char *found_interp)
260 else if (found_needed) 289{
261 printf(" "); 290 void *strtbl_void;
291
292 if (!show_interp) return NULL;
293
294 strtbl_void = elf_findsecbyname(elf, ".interp");
295
296 if (strtbl_void) {
297#define SHOW_INTERP(B) \
298 if (elf->elf_class == ELFCLASS ## B) { \
299 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
300 *found_interp = 1; \
301 return elf->data + EGET(strtbl->sh_offset); \
262 } 302 }
303 SHOW_INTERP(32)
304 SHOW_INTERP(64)
305 }
306 return NULL;
307}
308static char *scanelf_file_bind(elfobj *elf, char *found_bind)
309{
310 unsigned long i;
311 struct stat s;
263 312
264 /* search the symbol table for a specified symbol */ 313 if (!show_bind) return NULL;
265 if (find_sym) { 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}
349static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
350{
351 unsigned long i;
266 void *symtab_void, *strtab_void; 352 void *symtab_void, *strtab_void;
267 char *versioned_symname;
268 size_t len;
269 353
270 len = strlen(find_sym) + 1; 354 if (!find_sym) return NULL;
271 versioned_symname = (char *)malloc(sizeof(char) * (len+1));
272 if (!versioned_symname) {
273 warnf("Could not malloc() mem for sym scan");
274 return;
275 }
276 sprintf(versioned_symname, "%s@", find_sym);
277 355
278 symtab_void = elf_findsecbyname(elf, ".symtab"); 356 symtab_void = elf_findsecbyname(elf, ".symtab");
279 strtab_void = elf_findsecbyname(elf, ".strtab"); 357 strtab_void = elf_findsecbyname(elf, ".strtab");
280 358
281 if (symtab_void && strtab_void) { 359 if (symtab_void && strtab_void) {
282#define FIND_SYM(B) \ 360#define FIND_SYM(B) \
283 if (elf->elf_class == ELFCLASS ## B) { \ 361 if (elf->elf_class == ELFCLASS ## B) { \
284 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 362 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
285 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 363 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
286 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)); \
287 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 365 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
288 char *symname; \ 366 char *symname; \
289 for (i = 0; i < cnt; ++i) { \ 367 for (i = 0; i < cnt; ++i) { \
290 if (sym->st_name) { \ 368 if (sym->st_name) { \
291 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)); \
292 if (*find_sym == '*') { \ 370 if (*find_sym == '*') { \
293 printf("%s(%s) %5lX %15s %s\n", \ 371 printf("%s(%s) %5lX %15s %s\n", \
294 ((found_sym == 0) ? "\n\t" : "\t"), \ 372 ((*found_sym == 0) ? "\n\t" : "\t"), \
295 (char *)basename(filename), \ 373 (char *)basename(filename), \
296 (long)sym->st_size, \ 374 (long)sym->st_size, \
297 (char *)get_elfstttype(sym->st_info), \ 375 (char *)get_elfstttype(sym->st_info), \
298 symname); \ 376 symname); \
299 found_sym = 1; \ 377 *found_sym = 1; \
300 } else if ((strcmp(find_sym, symname) == 0) || \ 378 } else if ((strcmp(find_sym, symname) == 0) || \
301 (strncmp(symname, versioned_symname, len) == 0)) \ 379 (strcmp(symname, versioned_symname) == 0)) \
302 found_sym++; \ 380 (*found_sym)++; \
303 } \ 381 } \
304 ++sym; \ 382 ++sym; \
305 } } 383 } }
306 FIND_SYM(32) 384 FIND_SYM(32)
307 FIND_SYM(64) 385 FIND_SYM(64)
386 }
387 if (*find_sym != '*' && *found_sym)
388 return find_sym;
389 if (be_quiet)
390 return NULL;
391 else
392 return " - ";
393}
394/* scan an elf file and show all the fun stuff */
395#define prints(str) fputs(str, stdout)
396static void scanelf_file(const char *filename)
397{
398 unsigned long i;
399 char found_pax, found_stack, found_relro, found_textrel,
400 found_rpath, found_needed, found_interp, found_bind,
401 found_sym, found_file;
402 elfobj *elf;
403 struct stat st;
404 static char *out_buffer = NULL;
405 static size_t out_len;
406
407 /* make sure 'filename' exists */
408 if (lstat(filename, &st) == -1) {
409 if (be_verbose > 2) printf("%s: does not exist\n", filename);
410 return;
411 }
412 /* always handle regular files and handle symlinked files if no -y */
413 if (!(S_ISREG(st.st_mode) || (S_ISLNK(st.st_mode) && scan_symlink))) {
414 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
415 return;
416 }
417
418 found_pax = found_stack = found_relro = found_textrel = \
419 found_rpath = found_needed = found_interp = found_bind = \
420 found_sym = found_file = 0;
421
422 /* verify this is real ELF */
423 if ((elf = readelf(filename)) == NULL) {
424 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
425 return;
426 }
427
428 if (be_verbose > 1)
429 printf("%s: scanning file {%s,%s}\n", filename,
430 get_elfeitype(elf, EI_CLASS, elf->elf_class),
431 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
432 else if (be_verbose)
433 printf("%s: scanning file\n", filename);
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
442 /* show the header */
443 if (!be_quiet && show_banner) {
444 for (i = 0; out_format[i]; ++i) {
445 if (out_format[i] != '%') continue;
446
447 switch (out_format[++i]) {
448 case '%': break;
449 case 'F': prints("FILE "); found_file = 1; break;
450 case 'o': prints(" TYPE "); break;
451 case 'x': prints(" PAX "); break;
452 case 'e': prints("STK/REL "); break;
453 case 't': prints("TEXTREL "); break;
454 case 'r': prints("RPATH "); break;
455 case 'n': prints("NEEDED "); break;
456 case 'i': prints("INTERP "); break;
457 case 'b': prints("BIND "); break;
458 case 's': prints("SYM "); break;
308 } 459 }
309 free(versioned_symname);
310 if (*find_sym != '*') {
311 if (found_sym)
312 printf(" %s ", find_sym);
313 else if (!be_quiet)
314 fputs(" - ", stdout);
315 }
316 } 460 }
461 if (!found_file) prints("FILE ");
462 prints("\n");
463 found_file = 0;
464 show_banner = 0;
465 }
317 466
467 /* dump all the good stuff */
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
475 if (out_format[i] != '%') {
476 xchrcat(&out_buffer, out_format[i], &out_len);
477 continue;
478 }
479
480 out = NULL;
481 switch (out_format[++i]) {
482 case '%': xchrcat(&out_buffer, '%', &out_len); break;
483 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
484 case 'o': out = get_elfetype(elf); break;
485 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
486 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
487 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
488 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
489 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
490 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
491 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
492 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
493 }
494 if (out) xstrcat(&out_buffer, out, &out_len);
495 }
496
497 if (!found_file) {
318 if (!be_quiet || found_pax || found_stack || found_textrel || \ 498 if (!be_quiet || found_pax || found_stack || found_textrel || \
319 found_rpath || found_needed || found_sym) 499 found_rpath || found_needed || found_interp || found_bind || \
320 puts(filename); 500 found_sym)
501 {
502 xchrcat(&out_buffer, ' ', &out_len);
503 xstrcat(&out_buffer, filename, &out_len);
504 }
505 }
506 if (!(be_quiet && xemptybuffer(out_buffer)))
507 puts(out_buffer);
321 508
322 unreadelf(elf); 509 unreadelf(elf);
323} 510}
324 511
325/* 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 */
330 struct stat st_top, st; 517 struct stat st_top, st;
331 char buf[_POSIX_PATH_MAX]; 518 char buf[_POSIX_PATH_MAX];
332 size_t pathlen = 0, len = 0; 519 size_t pathlen = 0, len = 0;
333 520
334 /* make sure path exists */ 521 /* make sure path exists */
335 if (lstat(path, &st_top) == -1) 522 if (lstat(path, &st_top) == -1) {
523 if (be_verbose > 2) printf("%s: does not exist\n", path);
336 return; 524 return;
525 }
337 526
338 /* ok, if it isn't a directory, assume we can open it */ 527 /* ok, if it isn't a directory, assume we can open it */
339 if (!S_ISDIR(st_top.st_mode)) { 528 if (!S_ISDIR(st_top.st_mode)) {
340 scanelf_file(path); 529 scanelf_file(path);
341 return; 530 return;
368 } 557 }
369 } 558 }
370 closedir(dir); 559 closedir(dir);
371} 560}
372 561
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
373/* scan /etc/ld.so.conf for paths */ 612/* scan /etc/ld.so.conf for paths */
374static void scanelf_ldpath() 613static void scanelf_ldpath()
375{ 614{
376 char scan_l, scan_ul, scan_ull; 615 char scan_l, scan_ul, scan_ull;
377 char *path, *p; 616 int i = 0;
378 FILE *fp;
379 617
380 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 618 if (!ldpaths[0])
381 err("Unable to open ld.so.conf: %s", strerror(errno)); 619 err("Unable to load any paths from ld.so.conf");
382 620
383 scan_l = scan_ul = scan_ull = 0; 621 scan_l = scan_ul = scan_ull = 0;
384 622
385 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 623 while (ldpaths[i]) {
386 warn("Can not malloc() memory for ldpath scanning");
387 return;
388 }
389 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL)
390 if (*path == '/') {
391 if ((p = strrchr(path, '\r')) != NULL)
392 *p = 0;
393 if ((p = strrchr(path, '\n')) != NULL)
394 *p = 0;
395 if (!scan_l && !strcmp(path, "/lib")) scan_l = 1; 624 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
396 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 625 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
397 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 626 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
398 scanelf_dir(path); 627 scanelf_dir(ldpaths[i]);
628 ++i;
399 } 629 }
400 free(path);
401 fclose(fp);
402 630
403 if (!scan_l) scanelf_dir("/lib"); 631 if (!scan_l) scanelf_dir("/lib");
404 if (!scan_ul) scanelf_dir("/usr/lib"); 632 if (!scan_ul) scanelf_dir("/usr/lib");
405 if (!scan_ull) scanelf_dir("/usr/local/lib"); 633 if (!scan_ull) scanelf_dir("/usr/local/lib");
406} 634}
411 char *path, *p; 639 char *path, *p;
412 640
413 path = getenv("PATH"); 641 path = getenv("PATH");
414 if (!path) 642 if (!path)
415 err("PATH is not set in your env !"); 643 err("PATH is not set in your env !");
416 644 path = xstrdup(path);
417 if ((path = strdup(path)) == NULL)
418 err("strdup failed: %s", strerror(errno));
419 645
420 while ((p = strrchr(path, ':')) != NULL) { 646 while ((p = strrchr(path, ':')) != NULL) {
421 scanelf_dir(p + 1); 647 scanelf_dir(p + 1);
422 *p = 0; 648 *p = 0;
423 } 649 }
426} 652}
427 653
428 654
429 655
430/* usage / invocation handling functions */ 656/* usage / invocation handling functions */
431#define PARSE_FLAGS "plRmxetrns:aqvo:BhV" 657#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV"
432#define a_argument required_argument 658#define a_argument required_argument
433static struct option const long_opts[] = { 659static struct option const long_opts[] = {
434 {"path", no_argument, NULL, 'p'}, 660 {"path", no_argument, NULL, 'p'},
435 {"ldpath", no_argument, NULL, 'l'}, 661 {"ldpath", no_argument, NULL, 'l'},
436 {"recursive", no_argument, NULL, 'R'}, 662 {"recursive", no_argument, NULL, 'R'},
437 {"mount", no_argument, NULL, 'm'}, 663 {"mount", no_argument, NULL, 'm'},
664 {"symlink", no_argument, NULL, 'y'},
438 {"pax", no_argument, NULL, 'x'}, 665 {"pax", no_argument, NULL, 'x'},
439 {"header", no_argument, NULL, 'e'}, 666 {"header", no_argument, NULL, 'e'},
440 {"textrel", no_argument, NULL, 't'}, 667 {"textrel", no_argument, NULL, 't'},
441 {"rpath", no_argument, NULL, 'r'}, 668 {"rpath", no_argument, NULL, 'r'},
442 {"needed", no_argument, NULL, 'n'}, 669 {"needed", no_argument, NULL, 'n'},
670 {"interp", no_argument, NULL, 'i'},
671 {"bind", no_argument, NULL, 'b'},
443 {"symbol", a_argument, NULL, 's'}, 672 {"symbol", a_argument, NULL, 's'},
444 {"all", no_argument, NULL, 'a'}, 673 {"all", no_argument, NULL, 'a'},
445 {"quiet", no_argument, NULL, 'q'}, 674 {"quiet", no_argument, NULL, 'q'},
446 {"verbose", no_argument, NULL, 'v'}, 675 {"verbose", no_argument, NULL, 'v'},
676 {"format", a_argument, NULL, 'F'},
677 {"from", a_argument, NULL, 'f'},
447 {"file", a_argument, NULL, 'o'}, 678 {"file", a_argument, NULL, 'o'},
448 {"nobanner", no_argument, NULL, 'B'}, 679 {"nobanner", no_argument, NULL, 'B'},
449 {"help", no_argument, NULL, 'h'}, 680 {"help", no_argument, NULL, 'h'},
450 {"version", no_argument, NULL, 'V'}, 681 {"version", no_argument, NULL, 'V'},
451 {NULL, no_argument, NULL, 0x0} 682 {NULL, no_argument, NULL, 0x0}
452}; 683};
453static char *opts_help[] = { 684static char *opts_help[] = {
454 "Scan all directories in PATH environment", 685 "Scan all directories in PATH environment",
455 "Scan all directories in /etc/ld.so.conf", 686 "Scan all directories in /etc/ld.so.conf",
456 "Scan directories recursively", 687 "Scan directories recursively",
457 "Don't recursively cross mount points\n", 688 "Don't recursively cross mount points",
689 "Don't scan symlinks\n",
458 "Print PaX markings", 690 "Print PaX markings",
459 "Print GNU_STACK markings", 691 "Print GNU_STACK markings",
460 "Print TEXTREL information", 692 "Print TEXTREL information",
461 "Print RPATH information", 693 "Print RPATH information",
462 "Print NEEDED information", 694 "Print NEEDED information",
695 "Print INTERP information",
696 "Print BIND information",
463 "Find a specified symbol", 697 "Find a specified symbol",
464 "Print all scanned info (-x -e -t -r)\n", 698 "Print all scanned info (-x -e -t -r -n -i)\n",
465 "Only output 'bad' things", 699 "Only output 'bad' things",
466 "Be verbose (can be specified more than once)", 700 "Be verbose (can be specified more than once)",
701 "Use specified format for output",
702 "Read input stream from a filename",
467 "Write output stream to a filename", 703 "Write output stream to a filename",
468 "Don't display the header", 704 "Don't display the header",
469 "Print this help and exit", 705 "Print this help and exit",
470 "Print version and exit", 706 "Print version and exit",
471 NULL 707 NULL
472}; 708};
473 709
474/* display usage and exit */ 710/* display usage and exit */
475static void usage(int status) 711static void usage(int status)
476{ 712{
477 int i; 713 unsigned long i;
478 printf(" Scan ELF binaries for stuff\n" 714 printf(" Scan ELF binaries for stuff\n\n"
479 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 715 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
480 printf("Options: -[%s]\n", PARSE_FLAGS); 716 printf("Options: -[%s]\n", PARSE_FLAGS);
481 for (i = 0; long_opts[i].name; ++i) 717 for (i = 0; long_opts[i].name; ++i)
482 if (long_opts[i].has_arg == no_argument) 718 if (long_opts[i].has_arg == no_argument)
483 printf(" -%c, --%-13s %s\n", long_opts[i].val, 719 printf(" -%c, --%-13s %s\n", long_opts[i].val,
484 long_opts[i].name, opts_help[i]); 720 long_opts[i].name, opts_help[i]);
485 else 721 else
486 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 722 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val,
487 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
488 exit(status); 733 exit(status);
489} 734}
490 735
491/* parse command line arguments and preform needed actions */ 736/* parse command line arguments and preform needed actions */
492static void parseargs(int argc, char *argv[]) 737static void parseargs(int argc, char *argv[])
493{ 738{
494 int flag; 739 int i;
740 char *from_file = NULL;
495 741
496 opterr = 0; 742 opterr = 0;
497 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) {
498 switch (flag) { 744 switch (i) {
499 745
500 case 'V': /* version info */ 746 case 'V':
501 printf("%s compiled %s\n%s\n" 747 printf("%s compiled %s\n%s\n"
502 "%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",
503 __FILE__, __DATE__, rcsid, argv0); 749 __FILE__, __DATE__, rcsid, argv0);
504 exit(EXIT_SUCCESS); 750 exit(EXIT_SUCCESS);
505 break; 751 break;
506 case 'h': usage(EXIT_SUCCESS); break; 752 case 'h': usage(EXIT_SUCCESS); break;
507 753 case 'f':
754 if (from_file == NULL)
755 from_file = xstrdup(optarg);
756 break;
508 case 'o': { 757 case 'o': {
509 FILE *fp = NULL; 758 FILE *fp = NULL;
510 fp = freopen(optarg, "w", stdout); 759 fp = freopen(optarg, "w", stdout);
511 if (fp == NULL) 760 if (fp == NULL)
512 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 761 err("Could not open output stream '%s': %s", optarg, strerror(errno));
513 stdout = fp; 762 stdout = fp;
514 break; 763 break;
515 } 764 }
516 765
517 case 's': find_sym = strdup(optarg); break; 766 case 's': {
767 size_t len;
768 find_sym = xstrdup(optarg);
769 len = strlen(find_sym) + 1;
770 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
771 sprintf(versioned_symname, "%s@", find_sym);
772 break;
773 }
518 774
775 case 'F': {
776 out_format = xstrdup(optarg);
777 break;
778 }
779
780 case 'y': scan_symlink = 0; break;
519 case 'B': show_banner = 0; break; 781 case 'B': show_banner = 0; break;
520 case 'l': scan_ldpath = 1; break; 782 case 'l': scan_ldpath = 1; break;
521 case 'p': scan_envpath = 1; break; 783 case 'p': scan_envpath = 1; break;
522 case 'R': dir_recurse = 1; break; 784 case 'R': dir_recurse = 1; break;
523 case 'm': dir_crossmount = 0; break; 785 case 'm': dir_crossmount = 0; break;
524 case 'x': show_pax = 1; break; 786 case 'x': show_pax = 1; break;
525 case 'e': show_stack = 1; break; 787 case 'e': show_stack = 1; break;
526 case 't': show_textrel = 1; break; 788 case 't': show_textrel = 1; break;
527 case 'r': show_rpath = 1; break; 789 case 'r': show_rpath = 1; break;
528 case 'n': show_needed = 1; break; 790 case 'n': show_needed = 1; break;
791 case 'i': show_interp = 1; break;
792 case 'b': show_bind = 1; break;
529 case 'q': be_quiet = 1; break; 793 case 'q': be_quiet = 1; break;
530 case 'v': be_verbose = (be_verbose % 20) + 1; break; 794 case 'v': be_verbose = (be_verbose % 20) + 1; break;
531 case 'a': show_pax = show_stack = show_textrel = show_needed = show_rpath = 1; break; 795 case 'a': show_pax = show_stack = show_textrel = show_rpath = \
796 show_needed = show_interp = show_bind = 1; break;
532 797
533 case ':': 798 case ':':
534 warn("Option missing parameter"); 799 err("Option missing parameter\n");
535 usage(EXIT_FAILURE);
536 break;
537 case '?': 800 case '?':
538 warn("Unknown option"); 801 err("Unknown option\n");
539 usage(EXIT_FAILURE);
540 break;
541 default: 802 default:
542 err("Unhandled option '%c'", flag); 803 err("Unhandled option '%c'", i);
543 break; 804 }
805 }
806
807 /* let the format option override all other options */
808 if (out_format) {
809 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0;
810 for (i = 0; out_format[i]; ++i) {
811 if (out_format[i] != '%') continue;
812
813 switch (out_format[++i]) {
814 case '%': break;
815 case 'F': break;
816 case 's': break;
817 case 'o': break;
818 case 'x': show_pax = 1; break;
819 case 'e': show_stack = 1; break;
820 case 't': show_textrel = 1; break;
821 case 'r': show_rpath = 1; break;
822 case 'n': show_needed = 1; break;
823 case 'i': show_interp = 1; break;
824 case 'b': show_bind = 1; break;
825 default:
826 err("Invalid format specifier '%c' (byte %i)",
827 out_format[i], i+1);
544 } 828 }
545 } 829 }
546 830
547 if (be_quiet && be_verbose) 831 /* construct our default format */
548 err("You can be quiet or you can be verbose, not both, stupid"); 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);
845 }
846 if (be_verbose > 2) printf("Format: %s\n", out_format);
549 847
848 /* now lets actually do the scanning */
849 if (scan_ldpath || (show_rpath && be_quiet))
850 load_ld_so_conf();
550 if (scan_ldpath) scanelf_ldpath(); 851 if (scan_ldpath) scanelf_ldpath();
551 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 }
552 if (optind == argc && !scan_ldpath && !scan_envpath) 858 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
553 err("Nothing to scan !?"); 859 err("Nothing to scan !?");
554 while (optind < argc) 860 while (optind < argc)
555 scanelf_dir(argv[optind++]); 861 scanelf_dir(argv[optind++]);
556 862
557 if (find_sym) free(find_sym); 863 /* clean up */
864 if (find_sym) {
865 free(find_sym);
866 free(versioned_symname);
867 }
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;
558} 916}
559 917
560 918
561 919
562int main(int argc, char *argv[]) 920int main(int argc, char *argv[])

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