/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.35 Revision 1.58
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 1.58 2005/05/24 22:04:34 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 1.58 2005/05/24 22:04:34 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);
61 54
62/* variables to control behavior */ 55/* variables to control behavior */
56static char *ldpaths[256];
63static char scan_ldpath = 0; 57static char scan_ldpath = 0;
64static char scan_envpath = 0; 58static char scan_envpath = 0;
59static char scan_symlink = 1;
65static char dir_recurse = 0; 60static char dir_recurse = 0;
66static char dir_crossmount = 1; 61static char dir_crossmount = 1;
67static char show_pax = 0; 62static char show_pax = 0;
68static char show_stack = 0; 63static char show_stack = 0;
69static char show_textrel = 0; 64static char show_textrel = 0;
70static char show_rpath = 0; 65static char show_rpath = 0;
71static char show_needed = 0; 66static char show_needed = 0;
67static char show_interp = 0;
68static char show_bind = 0;
72static char show_banner = 1; 69static char show_banner = 1;
73static char be_quiet = 0; 70static char be_quiet = 0;
74static char be_verbose = 0; 71static char be_verbose = 0;
72static char *find_sym = NULL, *versioned_symname = NULL;
75static char *find_sym = NULL; 73static char *out_format = NULL;
76 74
77 75
78 76
79/* scan an elf file and show all the fun stuff */ 77/* sub-funcs for scanelf_file() */
80static void scanelf_file(const char *filename) 78static char *scanelf_file_pax(elfobj *elf, char *found_pax)
81{ 79{
82 int i; 80 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 81
88 /* make sure path exists */ 82 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 83
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)); 84 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
127 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 85 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
128 found_pax = 1; 86 *found_pax = 1;
129 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 87 return paxflags;
130 } 88 }
131 }
132 89
133 /* stack fun */ 90 return NULL;
134 if (show_stack) { 91}
92static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
93{
94 static char ret[8] = "--- ---";
95 char *found;
96 unsigned long i, off, shown;
97
98 if (!show_stack) return NULL;
99
100 shown = 0;
101
102 if (elf->phdr) {
135#define SHOW_STACK(B) \ 103#define SHOW_STACK(B) \
136 if (elf->elf_class == ELFCLASS ## B) { \ 104 if (elf->elf_class == ELFCLASS ## B) { \
137 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 105 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
138 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 106 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
139 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 107 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
140 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 108 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
141 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 109 found = found_stack; \
110 off = 0; \
111 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
112 found = found_relro; \
113 off = 4; \
114 } else \
115 continue; \
142 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 116 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
143 continue; \ 117 continue; \
144 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \ 118 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
145 found_stack = 1; \ 119 *found = 1; \
146 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \ 120 ++shown; \
121 } \
122 }
123 SHOW_STACK(32)
124 SHOW_STACK(64)
125 }
126
127 if (be_quiet && !shown)
128 return NULL;
129 else
130 return ret;
131}
132static char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
133{
134 static char *ret = "TEXTREL";
135 unsigned long i;
136
137 if (!show_textrel) return NULL;
138
139 if (elf->phdr) {
140#define SHOW_TEXTREL(B) \
141 if (elf->elf_class == ELFCLASS ## B) { \
142 Elf ## B ## _Dyn *dyn; \
143 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
144 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
145 Elf ## B ## _Off offset; \
146 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
147 if (phdr[i].p_type != PT_DYNAMIC) continue; \
148 offset = EGET(phdr[i].p_offset); \
149 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
150 dyn = DYN ## B (elf->data + offset); \
151 while (EGET(dyn->d_tag) != DT_NULL) { \
152 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
147 found_relro = 1; \ 153 *found_textrel = 1; \
148 printf("%s ", gnu_short_stack_flags(EGET(phdr[i].p_flags))); \ 154 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
155 return ret; \
156 } \
157 ++dyn; \
149 } \ 158 } \
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 } } 159 } }
176 SHOW_TEXTREL(32) 160 SHOW_TEXTREL(32)
177 SHOW_TEXTREL(64) 161 SHOW_TEXTREL(64)
178 if (!be_quiet && !found_textrel) fputs("------- ", stdout);
179 } 162 }
180 163
181 /* rpath fun */ 164 if (be_quiet)
182 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 165 return NULL;
183 if (show_rpath) { 166 else
167 return " - ";
168}
169static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
170{
171 /* TODO: when checking RPATH entries, check each subpath (between :) in ld.so.conf */
172 unsigned long i, s;
184 char *rpath, *runpath; 173 char *rpath, *runpath, **r;
174 void *strtbl_void;
175
176 if (!show_rpath) return;
177
185 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 178 strtbl_void = elf_findsecbyname(elf, ".dynstr");
186 rpath = runpath = NULL; 179 rpath = runpath = NULL;
187 180
188 if (strtbl_void) { 181 if (elf->phdr && strtbl_void) {
189#define SHOW_RPATH(B) \ 182#define SHOW_RPATH(B) \
190 if (elf->elf_class == ELFCLASS ## B) { \ 183 if (elf->elf_class == ELFCLASS ## B) { \
191 Elf ## B ## _Dyn *dyn; \ 184 Elf ## B ## _Dyn *dyn; \
192 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 185 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
193 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 186 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
194 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 187 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
188 Elf ## B ## _Off offset; \
189 Elf ## B ## _Sxword word; \
190 /* Scan all the program headers */ \
195 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 191 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
192 /* Just scan dynamic headers */ \
196 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 193 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
194 offset = EGET(phdr[i].p_offset); \
195 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
196 /* Just scan dynamic RPATH/RUNPATH headers */ \
197 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 197 dyn = DYN ## B (elf->data + offset); \
198 while (EGET(dyn->d_tag) != DT_NULL) { \ 198 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
199 if (EGET(dyn->d_tag) == DT_RPATH) { \ 199 if (word == DT_RPATH) { \
200 r = &rpath; \
201 } else if (word == DT_RUNPATH) { \
202 r = &runpath; \
203 } else { \
204 ++dyn; \
205 continue; \
206 } \
207 /* Verify the memory is somewhat sane */ \
200 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 208 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
209 if (offset < elf->len) { \
210 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
211 *r = (char*)(elf->data + offset); \
212 /* If quiet, don't output paths in ld.so.conf */ \
213 if (be_quiet) \
214 for (s = 0; ldpaths[s]; ++s) \
215 if (!strcmp(ldpaths[s], *r)) { \
216 *r = NULL; \
217 break; \
218 } \
201 found_rpath = 1; \ 219 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 } \ 220 } \
206 ++dyn; \ 221 ++dyn; \
207 } \ 222 } \
208 } } 223 } }
209 SHOW_RPATH(32) 224 SHOW_RPATH(32)
210 SHOW_RPATH(64) 225 SHOW_RPATH(64)
211 } 226 }
227
212 if (rpath && runpath) { 228 if (rpath && runpath) {
213 if (!strcmp(rpath, runpath)) 229 if (!strcmp(rpath, runpath)) {
214 printf("%-5s ", runpath); 230 xstrcat(ret, runpath, ret_len);
215 else { 231 } else {
216 fprintf(stderr, "%s's RPATH [%s] != RUNPATH [%s]\n", filename, rpath, runpath); 232 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
217 printf("{%s,%s} ", rpath, runpath); 233 xchrcat(ret, '{', ret_len);
234 xstrcat(ret, rpath, ret_len);
235 xchrcat(ret, ',', ret_len);
236 xstrcat(ret, runpath, ret_len);
237 xchrcat(ret, '}', ret_len);
218 } 238 }
219 } else if (rpath || runpath) 239 } else if (rpath || runpath)
220 printf("%-5s ", (runpath ? runpath : rpath)); 240 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
221 else if (!be_quiet && !found_rpath) 241 else if (!be_quiet)
222 printf(" - "); 242 xstrcat(ret, " - ", ret_len);
223 } 243}
224 244static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len)
225 /* print out all the NEEDED entries */ 245{
226 if (show_needed) { 246 unsigned long i;
227 char *needed; 247 char *needed;
248 void *strtbl_void;
249
250 if (!show_needed) return;
251
228 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 252 strtbl_void = elf_findsecbyname(elf, ".dynstr");
229 253
230 if (strtbl_void) { 254 if (elf->phdr && strtbl_void) {
231#define SHOW_NEEDED(B) \ 255#define SHOW_NEEDED(B) \
232 if (elf->elf_class == ELFCLASS ## B) { \ 256 if (elf->elf_class == ELFCLASS ## B) { \
233 Elf ## B ## _Dyn *dyn; \ 257 Elf ## B ## _Dyn *dyn; \
234 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 258 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 259 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
236 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 260 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
261 Elf ## B ## _Off offset; \
237 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 262 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; \ 263 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
264 offset = EGET(phdr[i].p_offset); \
265 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
244 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 266 dyn = DYN ## B (elf->data + offset); \
245 while (EGET(dyn->d_tag) != DT_NULL) { \ 267 while (EGET(dyn->d_tag) != DT_NULL) { \
246 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 268 if (EGET(dyn->d_tag) == DT_NEEDED) { \
247 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 269 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
248 if (found_needed) printf(","); \ 270 if (offset >= elf->len) { \
249 printf("%s", needed); \ 271 ++dyn; \
272 continue; \
273 } \
274 needed = (char*)(elf->data + offset); \
275 if (*found_needed) xchrcat(ret, ',', ret_len); \
276 xstrcat(ret, needed, ret_len); \
250 found_needed = 1; \ 277 *found_needed = 1; \
251 } \ 278 } \
252 ++dyn; \ 279 ++dyn; \
253 } \ 280 } \
254 } } 281 } }
255 SHOW_NEEDED(32) 282 SHOW_NEEDED(32)
256 SHOW_NEEDED(64) 283 SHOW_NEEDED(64)
257 } 284 }
258 if (!be_quiet && !found_needed) 285}
259 printf(" - "); 286static char *scanelf_file_interp(elfobj *elf, char *found_interp)
260 else if (found_needed) 287{
261 printf(" "); 288 void *strtbl_void;
289
290 if (!show_interp) return NULL;
291
292 strtbl_void = elf_findsecbyname(elf, ".interp");
293
294 if (strtbl_void) {
295#define SHOW_INTERP(B) \
296 if (elf->elf_class == ELFCLASS ## B) { \
297 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
298 *found_interp = 1; \
299 return elf->data + EGET(strtbl->sh_offset); \
262 } 300 }
301 SHOW_INTERP(32)
302 SHOW_INTERP(64)
303 }
304 return NULL;
305}
306static char *scanelf_file_bind(elfobj *elf, char *found_bind)
307{
308 unsigned long i;
309 struct stat s;
263 310
264 /* search the symbol table for a specified symbol */ 311 if (!show_bind) return NULL;
265 if (find_sym) { 312 if (!elf->phdr) return NULL;
313
314#define SHOW_BIND(B) \
315 if (elf->elf_class == ELFCLASS ## B) { \
316 Elf ## B ## _Dyn *dyn; \
317 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
318 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
319 Elf ## B ## _Off offset; \
320 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
321 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
322 offset = EGET(phdr[i].p_offset); \
323 if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
324 dyn = DYN ## B (elf->data + offset); \
325 while (EGET(dyn->d_tag) != DT_NULL) { \
326 if (EGET(dyn->d_tag) == DT_BIND_NOW || \
327 (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
328 { \
329 if (be_quiet) return NULL; \
330 *found_bind = 1; \
331 return "NOW"; \
332 } \
333 ++dyn; \
334 } \
335 } \
336 }
337 SHOW_BIND(32)
338 SHOW_BIND(64)
339
340 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
341 return NULL;
342 } else {
343 *found_bind = 1;
344 return "LAZY";
345 }
346}
347static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
348{
349 unsigned long i;
266 void *symtab_void, *strtab_void; 350 void *symtab_void, *strtab_void;
267 char *versioned_symname;
268 size_t len;
269 351
270 len = strlen(find_sym) + 1; 352 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);
277 353
278 symtab_void = elf_findsecbyname(elf, ".symtab"); 354 symtab_void = elf_findsecbyname(elf, ".symtab");
279 strtab_void = elf_findsecbyname(elf, ".strtab"); 355 strtab_void = elf_findsecbyname(elf, ".strtab");
280 356
281 if (symtab_void && strtab_void) { 357 if (symtab_void && strtab_void) {
282#define FIND_SYM(B) \ 358#define FIND_SYM(B) \
283 if (elf->elf_class == ELFCLASS ## B) { \ 359 if (elf->elf_class == ELFCLASS ## B) { \
284 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 360 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
285 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 361 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
286 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 362 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
287 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \ 363 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
288 char *symname; \ 364 char *symname; \
289 for (i = 0; i < cnt; ++i) { \ 365 for (i = 0; i < cnt; ++i) { \
290 if (sym->st_name) { \ 366 if (sym->st_name) { \
291 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 367 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
292 if (*find_sym == '*') { \ 368 if (*find_sym == '*') { \
293 printf("%s(%s) %5lX %15s %s\n", \ 369 printf("%s(%s) %5lX %15s %s\n", \
294 ((found_sym == 0) ? "\n\t" : "\t"), \ 370 ((*found_sym == 0) ? "\n\t" : "\t"), \
295 (char *)basename(filename), \ 371 (char *)basename(filename), \
296 (long)sym->st_size, \ 372 (long)sym->st_size, \
297 (char *)get_elfstttype(sym->st_info), \ 373 (char *)get_elfstttype(sym->st_info), \
298 symname); \ 374 symname); \
299 found_sym = 1; \ 375 *found_sym = 1; \
300 } else if ((strcmp(find_sym, symname) == 0) || \ 376 } else if ((strcmp(find_sym, symname) == 0) || \
301 (strncmp(symname, versioned_symname, len) == 0)) \ 377 (strcmp(symname, versioned_symname) == 0)) \
302 found_sym++; \ 378 (*found_sym)++; \
303 } \ 379 } \
304 ++sym; \ 380 ++sym; \
305 } } 381 } }
306 FIND_SYM(32) 382 FIND_SYM(32)
307 FIND_SYM(64) 383 FIND_SYM(64)
384 }
385 if (*find_sym != '*' && *found_sym)
386 return find_sym;
387 if (be_quiet)
388 return NULL;
389 else
390 return " - ";
391}
392/* scan an elf file and show all the fun stuff */
393// #define prints(str) fputs(str, stdout)
394#define prints(str) write(fileno(stdout), str, strlen(str))
395static void scanelf_file(const char *filename)
396{
397 unsigned long i;
398 char found_pax, found_stack, found_relro, found_textrel,
399 found_rpath, found_needed, found_interp, found_bind,
400 found_sym, found_file;
401 elfobj *elf;
402 struct stat st;
403 static char *out_buffer = NULL;
404 static size_t out_len;
405
406 /* make sure 'filename' exists */
407 if (lstat(filename, &st) == -1) {
408 if (be_verbose > 2) printf("%s: does not exist\n", filename);
409 return;
410 }
411 /* always handle regular files and handle symlinked files if no -y */
412 if (S_ISLNK(st.st_mode)) {
413 if (!scan_symlink) return;
414 stat(filename, &st);
415 }
416 if (!S_ISREG(st.st_mode)) {
417 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
418 return;
419 }
420
421 found_pax = found_stack = found_relro = found_textrel = \
422 found_rpath = found_needed = found_interp = found_bind = \
423 found_sym = found_file = 0;
424
425 /* verify this is real ELF */
426 if ((elf = readelf(filename)) == NULL) {
427 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
428 return;
429 }
430
431 if (be_verbose > 1)
432 printf("%s: scanning file {%s,%s}\n", filename,
433 get_elfeitype(elf, EI_CLASS, elf->elf_class),
434 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
435 else if (be_verbose)
436 printf("%s: scanning file\n", filename);
437
438 /* init output buffer */
439 if (!out_buffer) {
440 out_len = sizeof(char) * 80;
441 out_buffer = (char*)xmalloc(out_len);
442 }
443 *out_buffer = '\0';
444
445 /* show the header */
446 if (!be_quiet && show_banner) {
447 for (i = 0; out_format[i]; ++i) {
448 if (out_format[i] != '%') continue;
449
450 switch (out_format[++i]) {
451 case '%': break;
452 case 'F': prints("FILE "); found_file = 1; break;
453 case 'o': prints(" TYPE "); break;
454 case 'x': prints(" PAX "); break;
455 case 'e': prints("STK/REL "); break;
456 case 't': prints("TEXTREL "); break;
457 case 'r': prints("RPATH "); break;
458 case 'n': prints("NEEDED "); break;
459 case 'i': prints("INTERP "); break;
460 case 'b': prints("BIND "); break;
461 case 's': prints("SYM "); break;
308 } 462 }
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 } 463 }
464 if (!found_file) prints("FILE ");
465 prints("\n");
466 found_file = 0;
467 show_banner = 0;
468 }
317 469
470 /* dump all the good stuff */
471 for (i = 0; out_format[i]; ++i) {
472 const char *out;
473
474 /* make sure we trim leading spaces in quiet mode */
475 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
476 *out_buffer = '\0';
477
478 if (out_format[i] != '%') {
479 xchrcat(&out_buffer, out_format[i], &out_len);
480 continue;
481 }
482
483 out = NULL;
484 switch (out_format[++i]) {
485 case '%': xchrcat(&out_buffer, '%', &out_len); break;
486 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
487 case 'o': out = get_elfetype(elf); break;
488 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
489 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
490 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
491 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
492 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
493 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
494 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
495 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
496 }
497 if (out) xstrcat(&out_buffer, out, &out_len);
498 }
499
500#define FOUND_SOMETHING() \
318 if (!be_quiet || found_pax || found_stack || found_textrel || \ 501 (found_pax || found_stack || found_textrel || found_rpath || \
319 found_rpath || found_needed || found_sym) 502 found_needed || found_interp || found_bind || found_sym)
320 puts(filename); 503
504 if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
505 xchrcat(&out_buffer, ' ', &out_len);
506 xstrcat(&out_buffer, filename, &out_len);
507 }
508 if (!be_quiet || (be_quiet && FOUND_SOMETHING()))
509 puts(out_buffer);
321 510
322 unreadelf(elf); 511 unreadelf(elf);
323} 512}
324 513
325/* scan a directory for ET_EXEC files and print when we find one */ 514/* scan a directory for ET_EXEC files and print when we find one */
330 struct stat st_top, st; 519 struct stat st_top, st;
331 char buf[_POSIX_PATH_MAX]; 520 char buf[_POSIX_PATH_MAX];
332 size_t pathlen = 0, len = 0; 521 size_t pathlen = 0, len = 0;
333 522
334 /* make sure path exists */ 523 /* make sure path exists */
335 if (lstat(path, &st_top) == -1) 524 if (lstat(path, &st_top) == -1) {
525 if (be_verbose > 2) printf("%s: does not exist\n", path);
336 return; 526 return;
527 }
337 528
338 /* ok, if it isn't a directory, assume we can open it */ 529 /* ok, if it isn't a directory, assume we can open it */
339 if (!S_ISDIR(st_top.st_mode)) { 530 if (!S_ISDIR(st_top.st_mode)) {
340 scanelf_file(path); 531 scanelf_file(path);
341 return; 532 return;
368 } 559 }
369 } 560 }
370 closedir(dir); 561 closedir(dir);
371} 562}
372 563
564static int scanelf_from_file(char *filename)
565{
566 FILE *fp = NULL;
567 char *p;
568 char path[_POSIX_PATH_MAX];
569
570 if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
571 fp = stdin;
572 else if ((fp = fopen(filename, "r")) == NULL)
573 return 1;
574
575 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
576 if ((p = strchr(path, '\n')) != NULL)
577 *p = 0;
578 scanelf_dir(path);
579 }
580 if (fp != stdin)
581 fclose(fp);
582 return 0;
583}
584
585static void load_ld_so_conf()
586{
587 FILE *fp = NULL;
588 char *p;
589 char path[_POSIX_PATH_MAX];
590 int i = 0;
591
592 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
593 return;
594
595 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
596 if (*path != '/')
597 continue;
598
599 if ((p = strrchr(path, '\r')) != NULL)
600 *p = 0;
601 if ((p = strchr(path, '\n')) != NULL)
602 *p = 0;
603
604 ldpaths[i++] = xstrdup(path);
605
606 if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
607 break;
608 }
609 ldpaths[i] = NULL;
610
611 fclose(fp);
612}
613
373/* scan /etc/ld.so.conf for paths */ 614/* scan /etc/ld.so.conf for paths */
374static void scanelf_ldpath() 615static void scanelf_ldpath()
375{ 616{
376 char scan_l, scan_ul, scan_ull; 617 char scan_l, scan_ul, scan_ull;
377 char *path, *p; 618 int i = 0;
378 FILE *fp;
379 619
380 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 620 if (!ldpaths[0])
381 err("Unable to open ld.so.conf: %s", strerror(errno)); 621 err("Unable to load any paths from ld.so.conf");
382 622
383 scan_l = scan_ul = scan_ull = 0; 623 scan_l = scan_ul = scan_ull = 0;
384 624
385 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 625 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; 626 if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
396 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 627 if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
397 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 628 if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
398 scanelf_dir(path); 629 scanelf_dir(ldpaths[i]);
630 ++i;
399 } 631 }
400 free(path);
401 fclose(fp);
402 632
403 if (!scan_l) scanelf_dir("/lib"); 633 if (!scan_l) scanelf_dir("/lib");
404 if (!scan_ul) scanelf_dir("/usr/lib"); 634 if (!scan_ul) scanelf_dir("/usr/lib");
405 if (!scan_ull) scanelf_dir("/usr/local/lib"); 635 if (!scan_ull) scanelf_dir("/usr/local/lib");
406} 636}
411 char *path, *p; 641 char *path, *p;
412 642
413 path = getenv("PATH"); 643 path = getenv("PATH");
414 if (!path) 644 if (!path)
415 err("PATH is not set in your env !"); 645 err("PATH is not set in your env !");
416 646 path = xstrdup(path);
417 if ((path = strdup(path)) == NULL)
418 err("strdup failed: %s", strerror(errno));
419 647
420 while ((p = strrchr(path, ':')) != NULL) { 648 while ((p = strrchr(path, ':')) != NULL) {
421 scanelf_dir(p + 1); 649 scanelf_dir(p + 1);
422 *p = 0; 650 *p = 0;
423 } 651 }
426} 654}
427 655
428 656
429 657
430/* usage / invocation handling functions */ 658/* usage / invocation handling functions */
431#define PARSE_FLAGS "plRmxetrns:aqvo:BhV" 659#define PARSE_FLAGS "plRmyxetrnibs:aqvF:f:o:BhV"
432#define a_argument required_argument 660#define a_argument required_argument
433static struct option const long_opts[] = { 661static struct option const long_opts[] = {
434 {"path", no_argument, NULL, 'p'}, 662 {"path", no_argument, NULL, 'p'},
435 {"ldpath", no_argument, NULL, 'l'}, 663 {"ldpath", no_argument, NULL, 'l'},
436 {"recursive", no_argument, NULL, 'R'}, 664 {"recursive", no_argument, NULL, 'R'},
437 {"mount", no_argument, NULL, 'm'}, 665 {"mount", no_argument, NULL, 'm'},
666 {"symlink", no_argument, NULL, 'y'},
438 {"pax", no_argument, NULL, 'x'}, 667 {"pax", no_argument, NULL, 'x'},
439 {"header", no_argument, NULL, 'e'}, 668 {"header", no_argument, NULL, 'e'},
440 {"textrel", no_argument, NULL, 't'}, 669 {"textrel", no_argument, NULL, 't'},
441 {"rpath", no_argument, NULL, 'r'}, 670 {"rpath", no_argument, NULL, 'r'},
442 {"needed", no_argument, NULL, 'n'}, 671 {"needed", no_argument, NULL, 'n'},
672 {"interp", no_argument, NULL, 'i'},
673 {"bind", no_argument, NULL, 'b'},
443 {"symbol", a_argument, NULL, 's'}, 674 {"symbol", a_argument, NULL, 's'},
444 {"all", no_argument, NULL, 'a'}, 675 {"all", no_argument, NULL, 'a'},
445 {"quiet", no_argument, NULL, 'q'}, 676 {"quiet", no_argument, NULL, 'q'},
446 {"verbose", no_argument, NULL, 'v'}, 677 {"verbose", no_argument, NULL, 'v'},
678 {"format", a_argument, NULL, 'F'},
679 {"from", a_argument, NULL, 'f'},
447 {"file", a_argument, NULL, 'o'}, 680 {"file", a_argument, NULL, 'o'},
448 {"nobanner", no_argument, NULL, 'B'}, 681 {"nobanner", no_argument, NULL, 'B'},
449 {"help", no_argument, NULL, 'h'}, 682 {"help", no_argument, NULL, 'h'},
450 {"version", no_argument, NULL, 'V'}, 683 {"version", no_argument, NULL, 'V'},
451 {NULL, no_argument, NULL, 0x0} 684 {NULL, no_argument, NULL, 0x0}
452}; 685};
686
453static char *opts_help[] = { 687static char *opts_help[] = {
454 "Scan all directories in PATH environment", 688 "Scan all directories in PATH environment",
455 "Scan all directories in /etc/ld.so.conf", 689 "Scan all directories in /etc/ld.so.conf",
456 "Scan directories recursively", 690 "Scan directories recursively",
457 "Don't recursively cross mount points\n", 691 "Don't recursively cross mount points",
692 "Don't scan symlinks\n",
458 "Print PaX markings", 693 "Print PaX markings",
459 "Print GNU_STACK markings", 694 "Print GNU_STACK markings",
460 "Print TEXTREL information", 695 "Print TEXTREL information",
461 "Print RPATH information", 696 "Print RPATH information",
462 "Print NEEDED information", 697 "Print NEEDED information",
698 "Print INTERP information",
699 "Print BIND information",
463 "Find a specified symbol", 700 "Find a specified symbol",
464 "Print all scanned info (-x -e -t -r)\n", 701 "Print all scanned info (-x -e -t -r -n -i -b)\n",
465 "Only output 'bad' things", 702 "Only output 'bad' things",
466 "Be verbose (can be specified more than once)", 703 "Be verbose (can be specified more than once)",
704 "Use specified format for output",
705 "Read input stream from a filename",
467 "Write output stream to a filename", 706 "Write output stream to a filename",
468 "Don't display the header", 707 "Don't display the header",
469 "Print this help and exit", 708 "Print this help and exit",
470 "Print version and exit", 709 "Print version and exit",
471 NULL 710 NULL
472}; 711};
473 712
474/* display usage and exit */ 713/* display usage and exit */
475static void usage(int status) 714static void usage(int status)
476{ 715{
477 int i; 716 unsigned long i;
478 printf(" Scan ELF binaries for stuff\n" 717 printf("* Scan ELF binaries for stuff\n\n"
479 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0); 718 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
480 printf("Options: -[%s]\n", PARSE_FLAGS); 719 printf("Options: -[%s]\n", PARSE_FLAGS);
481 for (i = 0; long_opts[i].name; ++i) 720 for (i = 0; long_opts[i].name; ++i)
482 if (long_opts[i].has_arg == no_argument) 721 if (long_opts[i].has_arg == no_argument)
483 printf(" -%c, --%-13s %s\n", long_opts[i].val, 722 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
484 long_opts[i].name, opts_help[i]); 723 long_opts[i].name, opts_help[i]);
485 else 724 else
486 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val, 725 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val,
487 long_opts[i].name, opts_help[i]); 726 long_opts[i].name, opts_help[i]);
727
728 if (status != EXIT_SUCCESS)
729 exit(status);
730
731 puts("\nThe format modifiers for the -F option are:");
732 puts(" %F Filename \t%x PaX Flags \t%e STACK/RELRO");
733 puts(" %t TEXTREL \t%r RPATH \t%n NEEDED");
734 puts(" %i INTERP \t%b BIND \t%s symbol");
735
488 exit(status); 736 exit(status);
489} 737}
490 738
491/* parse command line arguments and preform needed actions */ 739/* parse command line arguments and preform needed actions */
492static void parseargs(int argc, char *argv[]) 740static void parseargs(int argc, char *argv[])
493{ 741{
494 int flag; 742 int i;
743 char *from_file = NULL;
495 744
496 opterr = 0; 745 opterr = 0;
497 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 746 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
498 switch (flag) { 747 switch (i) {
499 748
500 case 'V': /* version info */ 749 case 'V':
501 printf("%s compiled %s\n%s\n" 750 printf("%s compiled %s\n%s\n"
502 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 751 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
503 __FILE__, __DATE__, rcsid, argv0); 752 __FILE__, __DATE__, rcsid, argv0);
504 exit(EXIT_SUCCESS); 753 exit(EXIT_SUCCESS);
505 break; 754 break;
506 case 'h': usage(EXIT_SUCCESS); break; 755 case 'h': usage(EXIT_SUCCESS); break;
507 756 case 'f':
757 if (from_file == NULL)
758 from_file = xstrdup(optarg);
759 break;
508 case 'o': { 760 case 'o': {
509 FILE *fp = NULL; 761 FILE *fp = NULL;
510 fp = freopen(optarg, "w", stdout); 762 fp = freopen(optarg, "w", stdout);
511 if (fp == NULL) 763 if (fp == NULL)
512 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 764 err("Could not open output stream '%s': %s", optarg, strerror(errno));
513 stdout = fp; 765 stdout = fp;
514 break; 766 break;
515 } 767 }
516 768
517 case 's': find_sym = strdup(optarg); break; 769 case 's': {
770 size_t len;
771 find_sym = xstrdup(optarg);
772 len = strlen(find_sym) + 1;
773 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
774 sprintf(versioned_symname, "%s@", find_sym);
775 break;
776 }
518 777
778 case 'F': {
779 out_format = xstrdup(optarg);
780 break;
781 }
782
783 case 'y': scan_symlink = 0; break;
519 case 'B': show_banner = 0; break; 784 case 'B': show_banner = 0; break;
520 case 'l': scan_ldpath = 1; break; 785 case 'l': scan_ldpath = 1; break;
521 case 'p': scan_envpath = 1; break; 786 case 'p': scan_envpath = 1; break;
522 case 'R': dir_recurse = 1; break; 787 case 'R': dir_recurse = 1; break;
523 case 'm': dir_crossmount = 0; break; 788 case 'm': dir_crossmount = 0; break;
524 case 'x': show_pax = 1; break; 789 case 'x': show_pax = 1; break;
525 case 'e': show_stack = 1; break; 790 case 'e': show_stack = 1; break;
526 case 't': show_textrel = 1; break; 791 case 't': show_textrel = 1; break;
527 case 'r': show_rpath = 1; break; 792 case 'r': show_rpath = 1; break;
528 case 'n': show_needed = 1; break; 793 case 'n': show_needed = 1; break;
794 case 'i': show_interp = 1; break;
795 case 'b': show_bind = 1; break;
529 case 'q': be_quiet = 1; break; 796 case 'q': be_quiet = 1; break;
530 case 'v': be_verbose = (be_verbose % 20) + 1; break; 797 case 'v': be_verbose = (be_verbose % 20) + 1; break;
531 case 'a': show_pax = show_stack = show_textrel = show_needed = show_rpath = 1; break; 798 case 'a': show_pax = show_stack = show_textrel = show_rpath = \
799 show_needed = show_interp = show_bind = 1; break;
532 800
533 case ':': 801 case ':':
534 warn("Option missing parameter"); 802 err("Option missing parameter\n");
535 usage(EXIT_FAILURE);
536 break;
537 case '?': 803 case '?':
538 warn("Unknown option"); 804 err("Unknown option\n");
539 usage(EXIT_FAILURE);
540 break;
541 default: 805 default:
542 err("Unhandled option '%c'", flag); 806 err("Unhandled option '%c'", i);
543 break; 807 }
808 }
809
810 /* let the format option override all other options */
811 if (out_format) {
812 show_pax = show_stack = show_textrel = show_rpath = \
813 show_needed = show_interp = show_bind = 0;
814 for (i = 0; out_format[i]; ++i) {
815 if (out_format[i] != '%') continue;
816
817 switch (out_format[++i]) {
818 case '%': break;
819 case 'F': break;
820 case 's': break;
821 case 'o': break;
822 case 'x': show_pax = 1; break;
823 case 'e': show_stack = 1; break;
824 case 't': show_textrel = 1; break;
825 case 'r': show_rpath = 1; break;
826 case 'n': show_needed = 1; break;
827 case 'i': show_interp = 1; break;
828 case 'b': show_bind = 1; break;
829 default:
830 err("Invalid format specifier '%c' (byte %i)",
831 out_format[i], i+1);
544 } 832 }
545 } 833 }
546 834
547 if (be_quiet && be_verbose) 835 /* construct our default format */
548 err("You can be quiet or you can be verbose, not both, stupid"); 836 } else {
837 size_t fmt_len = 30;
838 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
839 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
840 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
841 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len);
842 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
843 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
844 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
845 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
846 if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
847 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
848 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
849 }
850 if (be_verbose > 2) printf("Format: %s\n", out_format);
549 851
852 /* now lets actually do the scanning */
853 if (scan_ldpath || (show_rpath && be_quiet))
854 load_ld_so_conf();
550 if (scan_ldpath) scanelf_ldpath(); 855 if (scan_ldpath) scanelf_ldpath();
551 if (scan_envpath) scanelf_envpath(); 856 if (scan_envpath) scanelf_envpath();
857 if (from_file) {
858 scanelf_from_file(from_file);
859 free(from_file);
860 from_file = *argv;
861 }
552 if (optind == argc && !scan_ldpath && !scan_envpath) 862 if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
553 err("Nothing to scan !?"); 863 err("Nothing to scan !?");
554 while (optind < argc) 864 while (optind < argc)
555 scanelf_dir(argv[optind++]); 865 scanelf_dir(argv[optind++]);
556 866
557 if (find_sym) free(find_sym); 867 /* clean up */
868 if (find_sym) {
869 free(find_sym);
870 free(versioned_symname);
871 }
872 if (out_format) free(out_format);
873 for (i = 0; ldpaths[i]; ++i)
874 free(ldpaths[i]);
558} 875}
559 876
877
878
879/* utility funcs */
880static char *xstrdup(char *s)
881{
882 char *ret = strdup(s);
883 if (!ret) err("Could not strdup(): %s", strerror(errno));
884 return ret;
885}
886
887static void *xmalloc(size_t size)
888{
889 void *ret = malloc(size);
890 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
891 return ret;
892}
893
894static void xstrcat(char **dst, const char *src, size_t *curr_len)
895{
896 long new_len;
897
898 new_len = strlen(*dst) + strlen(src);
899 if (*curr_len <= new_len) {
900 *curr_len = new_len + (*curr_len / 2);
901 *dst = realloc(*dst, *curr_len);
902 if (!*dst)
903 err("could not realloc %li bytes", (unsigned long)*curr_len);
904 }
905
906 strcat(*dst, src);
907}
908
909static inline void xchrcat(char **dst, const char append, size_t *curr_len)
910{
911 static char my_app[2];
912 my_app[0] = append;
913 my_app[1] = '\0';
914 xstrcat(dst, my_app, curr_len);
915}
560 916
561 917
562int main(int argc, char *argv[]) 918int main(int argc, char *argv[])
563{ 919{
564 if (argc < 2) 920 if (argc < 2)

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