/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.20 Revision 1.40
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 1.20 2005/04/02 19:06:36 solar Exp $ 5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.40 2005/04/21 00:13:03 solar Exp $
6 * 6 *
7 ******************************************************************** 7 ********************************************************************
8 * This program is free software; you can redistribute it and/or 8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as 9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the 10 * published by the Free Software Foundation; either version 2 of the
22 */ 22 */
23 23
24#include <stdio.h> 24#include <stdio.h>
25#include <stdlib.h> 25#include <stdlib.h>
26#include <sys/types.h> 26#include <sys/types.h>
27#define __USE_GNU
27#include <string.h> 28#include <string.h>
28#include <errno.h> 29#include <errno.h>
29#include <unistd.h> 30#include <unistd.h>
30#include <sys/stat.h> 31#include <sys/stat.h>
31#include <dirent.h> 32#include <dirent.h>
32#include <getopt.h> 33#include <getopt.h>
33#include <assert.h> 34#include <assert.h>
35
34#include "paxelf.h" 36#include "paxelf.h"
35 37
36static const char *rcsid = "$Id: scanelf.c,v 1.20 2005/04/02 19:06:36 solar Exp $"; 38static const char *rcsid = "$Id: scanelf.c,v 1.40 2005/04/21 00:13:03 solar Exp $";
37 39#define argv0 "scanelf"
38
39/* helper functions for showing errors */
40#define argv0 "scanelf" /*((*argv != NULL) ? argv[0] : __FILE__ "\b\b")*/
41#define warn(fmt, args...) \
42 fprintf(stderr, "%s: " fmt "\n", argv0, ## args)
43#define warnf(fmt, args...) warn("%s(): " fmt, __FUNCTION__, ## args)
44#define err(fmt, args...) \
45 do { \
46 warn(fmt, ## args); \
47 exit(EXIT_FAILURE); \
48 } while (0)
49 40
50 41
51 42
52/* prototypes */ 43/* prototypes */
53static void scanelf_file(const char *filename); 44static void scanelf_file(const char *filename);
58static void parseargs(int argc, char *argv[]); 49static void parseargs(int argc, char *argv[]);
59 50
60/* variables to control behavior */ 51/* variables to control behavior */
61static char scan_ldpath = 0; 52static char scan_ldpath = 0;
62static char scan_envpath = 0; 53static char scan_envpath = 0;
54static char scan_symlink = 1;
63static char dir_recurse = 0; 55static char dir_recurse = 0;
64static char dir_crossmount = 1; 56static char dir_crossmount = 1;
65static char show_pax = 0; 57static char show_pax = 0;
66static char show_stack = 0; 58static char show_stack = 0;
67static char show_textrel = 0; 59static char show_textrel = 0;
68static char show_rpath = 0; 60static char show_rpath = 0;
61static char show_needed = 0;
62static char show_interp = 0;
69static char show_banner = 1; 63static char show_banner = 1;
70static char be_quiet = 0; 64static char be_quiet = 0;
71static char be_verbose = 0; 65static char be_verbose = 0;
66static char *find_sym = NULL, *versioned_symname = NULL;
67static char *out_format = NULL;
72 68
73 69
74 70
71/* sub-funcs for scanelf_file() */
72static void scanelf_file_pax(elfobj *elf, char *found_pax)
73{
74 char *paxflags;
75 if (!show_pax) return;
76
77 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
78 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
79 *found_pax = 1;
80 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf)));
81 }
82}
83static void scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
84{
85 int i;
86 if (!show_stack) return;
87#define SHOW_STACK(B) \
88 if (elf->elf_class == ELFCLASS ## B) { \
89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \
93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \
94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
95 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))); \
101 } \
102 }
103 SHOW_STACK(32)
104 SHOW_STACK(64)
105 if (!be_quiet && !*found_stack) printf("--- ");
106 if (!be_quiet && !*found_relro) printf("--- ");
107}
108static void scanelf_file_textrel(elfobj *elf, char *found_textrel)
109{
110 int i;
111 if (!show_textrel) return;
112#define SHOW_TEXTREL(B) \
113 if (elf->elf_class == ELFCLASS ## B) { \
114 Elf ## B ## _Dyn *dyn; \
115 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
116 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
117 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
118 if (phdr[i].p_type != PT_DYNAMIC) continue; \
119 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
120 while (EGET(dyn->d_tag) != DT_NULL) { \
121 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
122 *found_textrel = 1; \
123 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
124 printf("TEXTREL "); \
125 } \
126 ++dyn; \
127 } \
128 } }
129 SHOW_TEXTREL(32)
130 SHOW_TEXTREL(64)
131 if (!be_quiet && !*found_textrel) printf("------- ");
132}
133static void scanelf_file_rpath(elfobj *elf, char *found_rpath)
134{
135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */
136 int i;
137 char *rpath, *runpath;
138 void *strtbl_void;
139
140 if (!show_rpath) return;
141
142 strtbl_void = elf_findsecbyname(elf, ".dynstr");
143 rpath = runpath = NULL;
144
145 if (strtbl_void) {
146#define SHOW_RPATH(B) \
147 if (elf->elf_class == ELFCLASS ## B) { \
148 Elf ## B ## _Dyn *dyn; \
149 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
150 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
151 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
152 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
155 while (EGET(dyn->d_tag) != DT_NULL) { \
156 if (EGET(dyn->d_tag) == DT_RPATH) { \
157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
158 *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 } \
163 ++dyn; \
164 } \
165 } }
166 SHOW_RPATH(32)
167 SHOW_RPATH(64)
168 }
169 if (rpath && runpath) {
170 if (!strcmp(rpath, runpath))
171 printf("%-5s ", runpath);
172 else {
173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
174 printf("{%s,%s} ", rpath, runpath);
175 }
176 } else if (rpath || runpath)
177 printf("%-5s ", (runpath ? runpath : rpath));
178 else if (!be_quiet && !*found_rpath)
179 printf(" - ");
180}
181static void scanelf_file_needed(elfobj *elf, char *found_needed)
182{
183 int i;
184 char *needed;
185 void *strtbl_void;
186
187 if (!show_needed) return;
188
189 strtbl_void = elf_findsecbyname(elf, ".dynstr");
190
191 if (strtbl_void) {
192#define SHOW_NEEDED(B) \
193 if (elf->elf_class == ELFCLASS ## B) { \
194 Elf ## B ## _Dyn *dyn; \
195 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
196 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
197 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
198 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
201 while (EGET(dyn->d_tag) != DT_NULL) { \
202 if (EGET(dyn->d_tag) == DT_NEEDED) { \
203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 if (*found_needed) printf(","); \
205 printf("%s", needed); \
206 *found_needed = 1; \
207 } \
208 ++dyn; \
209 } \
210 } }
211 SHOW_NEEDED(32)
212 SHOW_NEEDED(64)
213 }
214 if (!be_quiet && !*found_needed)
215 printf(" - ");
216 else if (*found_needed)
217 printf(" ");
218}
219static void scanelf_file_interp(elfobj *elf, char *found_interp)
220{
221 void *strtbl_void;
222
223 if (!show_interp) return;
224
225 strtbl_void = elf_findsecbyname(elf, ".interp");
226
227 if (strtbl_void) {
228#define SHOW_INTERP(B) \
229 if (elf->elf_class == ELFCLASS ## B) { \
230 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
231 printf("%s ", elf->data + EGET(strtbl->sh_offset)); \
232 *found_interp = 1; \
233 }
234 SHOW_INTERP(32)
235 SHOW_INTERP(64)
236 }
237 if (!be_quiet && !*found_interp)
238 printf(" - ");
239 else if (*found_interp)
240 printf(" ");
241}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
243{
244 int i;
245 void *symtab_void, *strtab_void;
246
247 if (!find_sym) return;
248
249 symtab_void = elf_findsecbyname(elf, ".symtab");
250 strtab_void = elf_findsecbyname(elf, ".strtab");
251
252 if (symtab_void && strtab_void) {
253#define FIND_SYM(B) \
254 if (elf->elf_class == ELFCLASS ## B) { \
255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
257 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
258 int cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
259 char *symname; \
260 for (i = 0; i < cnt; ++i) { \
261 if (sym->st_name) { \
262 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
263 if (*find_sym == '*') { \
264 printf("%s(%s) %5lX %15s %s\n", \
265 ((*found_sym == 0) ? "\n\t" : "\t"), \
266 (char *)basename(filename), \
267 (long)sym->st_size, \
268 (char *)get_elfstttype(sym->st_info), \
269 symname); \
270 *found_sym = 1; \
271 } else if ((strcmp(find_sym, symname) == 0) || \
272 (strcmp(symname, versioned_symname) == 0)) \
273 (*found_sym)++; \
274 } \
275 ++sym; \
276 } }
277 FIND_SYM(32)
278 FIND_SYM(64)
279 }
280 if (*find_sym != '*') {
281 if (*found_sym)
282 printf(" %s ", find_sym);
283 else if (!be_quiet)
284 printf(" - ");
285 }
286}
75/* scan an elf file and show all the fun stuff */ 287/* scan an elf file and show all the fun stuff */
76static void scanelf_file(const char *filename) 288static void scanelf_file(const char *filename)
77{ 289{
78 int i; 290 int i;
79 char found_pax, found_stack, found_relro, found_textrel, found_rpath; 291 char found_pax, found_stack, found_relro, found_textrel,
80 Elf_Dyn *dyn; 292 found_rpath, found_needed, found_interp, found_sym,
293 found_file;
81 elfobj *elf = NULL; 294 elfobj *elf;
295 struct stat st;
82 296
297 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return;
301 }
302 /* always handle regular files and handle symlinked files if no -y */
303 if (!(S_ISREG(st.st_mode) || (S_ISLNK(st.st_mode) && scan_symlink))) {
304 if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
305 return;
306 }
307
83 found_pax = found_stack = found_relro = found_textrel = found_rpath = 0; 308 found_pax = found_stack = found_relro = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \
310 found_file = 0;
84 311
85 /* verify this is real ELF */ 312 /* verify this is real ELF */
86 if ((elf = readelf(filename)) == NULL) { 313 if ((elf = readelf(filename)) == NULL) {
87 if (be_verbose > 1) printf("%s: not an ELF\n", filename); 314 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
88 return; 315 return;
89 } 316 }
90 if (check_elf_header(elf->ehdr) || !IS_ELF(elf)) {
91 if (be_verbose > 1) printf("%s: cannot handle ELF :(\n", filename);
92 goto bail;
93 }
94 317
318 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose)
95 if (be_verbose) printf("%s: scanning file\n", filename); 323 printf("%s: scanning file\n", filename);
96 324
97 /* show the header */ 325 /* show the header */
98 if (!be_quiet && show_banner) { 326 if (!be_quiet && show_banner) {
99 fputs(" TYPE ", stdout); 327 if (out_format) {
100 if (show_pax) fputs(" PAX ", stdout); 328 for (i=0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue;
330
331 switch (out_format[++i]) {
332 case '%': break;
333 case 'F': printf("FILE "); break;
334 case 'x': printf(" PAX "); break;
335 case 'e': printf("STK/REL "); break;
336 case 't': printf("TEXTREL "); break;
337 case 'r': printf("RPATH "); break;
338 case 'n': printf("NEEDED "); break;
339 case 'i': printf("INTERP "); break;
340 case 's': printf("SYM "); break;
341 }
342 }
343 } else {
344 printf(" TYPE ");
345 if (show_pax) printf(" PAX ");
101 if (show_stack) fputs(" STK/REL ", stdout); 346 if (show_stack) printf("STK/REL ");
102 if (show_textrel) fputs("TEXTREL ", stdout); 347 if (show_textrel) printf("TEXTREL ");
103 if (show_rpath) fputs("RPATH ", stdout); 348 if (show_rpath) printf("RPATH ");
104 fputs(" FILE\n", stdout); 349 if (show_needed) printf("NEEDED ");
350 if (show_interp) printf("INTERP ");
351 if (find_sym) printf("SYM ");
352 }
353 if (!found_file) printf(" FILE");
354 printf("\n");
105 show_banner = 0; 355 show_banner = 0;
106 } 356 }
107 357
108 /* dump all the good stuff */ 358 /* dump all the good stuff */
109 if (!be_quiet) 359 if (!be_quiet && !out_format)
110 printf("%-7s ", get_elfetype(elf->ehdr->e_type)); 360 printf("%-7s ", get_elfetype(elf));
111 361
112 if (show_pax) { 362 if (out_format) {
113 char *paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 363 for (i=0; out_format[i]; ++i) {
114 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 364 if (out_format[i] != '%') {
115 found_pax = 1; 365 printf("%c", out_format[i]);
116 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf)));
117 }
118 }
119
120 /* stack fun */
121 if (show_stack) {
122 for (i = 0; i < elf->ehdr->e_phnum; i++) {
123 if (elf->phdr[i].p_type != PT_GNU_STACK && \
124 elf->phdr[i].p_type != PT_GNU_RELRO) continue;
125
126 if (be_quiet && !(elf->phdr[i].p_flags & PF_X))
127 continue; 366 continue;
128
129 if (elf->phdr[i].p_type == PT_GNU_STACK)
130 found_stack = 1;
131 if (elf->phdr[i].p_type == PT_GNU_RELRO)
132 found_relro = 1;
133
134 printf("%s ", gnu_short_stack_flags(elf->phdr[i].p_flags));
135 }
136 if (!be_quiet && !found_stack) fputs("--- ", stdout);
137 if (!be_quiet && !found_relro) fputs("--- ", stdout);
138 }
139
140 /* textrel fun */
141 if (show_textrel) {
142 for (i = 0; i < elf->ehdr->e_phnum; i++) {
143 if (elf->phdr[i].p_type != PT_DYNAMIC) continue;
144
145 dyn = (Elf_Dyn *)(elf->data + elf->phdr[i].p_offset);
146 while (dyn->d_tag != DT_NULL) {
147 if (dyn->d_tag == DT_TEXTREL) { //dyn->d_tag != DT_FLAGS)
148 found_textrel = 1;
149// if (dyn->d_un.d_val & DF_TEXTREL)
150 fputs("TEXTREL ", stdout);
151 }
152 ++dyn;
153 } 367 }
154 }
155 if (!be_quiet && !found_textrel) fputs("------- ", stdout);
156 }
157 368
158 /* rpath fun */ 369 switch (out_format[++i]) {
159 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 370 case '%': printf("%%"); break;
160 if (show_rpath) { 371 case 'F': found_file = 1; printf("%s ", filename); break;
161 Elf_Shdr *strtbl = elf_findsecbyname(elf, ".dynstr"); 372 case 'x': scanelf_file_pax(elf, &found_pax); break;
162 373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break;
163 if (strtbl) 374 case 't': scanelf_file_textrel(elf, &found_textrel); break;
164 for (i = 0; i < elf->ehdr->e_phnum; i++) { 375 case 'r': scanelf_file_rpath(elf, &found_rpath); break;
165 if (elf->phdr[i].p_type != PT_DYNAMIC) continue; 376 case 'n': scanelf_file_needed(elf, &found_needed); break;
166 377 case 'i': scanelf_file_interp(elf, &found_interp); break;
167 dyn = (Elf_Dyn *)(elf->data + elf->phdr[i].p_offset); 378 case 's': scanelf_file_sym(elf, &found_sym, filename); break;
168 while (dyn->d_tag != DT_NULL) {
169 if (dyn->d_tag == DT_RPATH) { //|| dyn->d_tag != DT_RUNPATH)
170 char *rpath = elf->data + strtbl->sh_offset + dyn->d_un.d_ptr;
171 found_rpath = 1;
172 printf("%s ", rpath);
173 }
174 ++dyn;
175 } 379 }
176 } 380 }
177 if (!be_quiet && !found_rpath) fputs(" - ", stdout); 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);
178 } 389 }
179 390
391 if (!found_file) {
180 if (!be_quiet || found_pax || found_stack || found_textrel || found_rpath) 392 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym)
181 puts(filename); 394 puts(filename);
395 } else {
396 printf("\n");
397 }
182 398
183bail:
184 unreadelf(elf); 399 unreadelf(elf);
185} 400}
186 401
187/* scan a directory for ET_EXEC files and print when we find one */ 402/* scan a directory for ET_EXEC files and print when we find one */
188static void scanelf_dir(const char *path) 403static void scanelf_dir(const char *path)
189{ 404{
190 register DIR *dir; 405 register DIR *dir;
191 register struct dirent *dentry; 406 register struct dirent *dentry;
192 struct stat st_top, st; 407 struct stat st_top, st;
193 char buf[PATH_MAX]; 408 char buf[_POSIX_PATH_MAX];
194 size_t len = 0; 409 size_t pathlen = 0, len = 0;
195 410
196 /* make sure path exists */ 411 /* make sure path exists */
197 if (lstat(path, &st_top) == -1) 412 if (lstat(path, &st_top) == -1) {
413 if (be_verbose > 2) printf("%s: does not exist\n", path);
198 return; 414 return;
415 }
199 416
200 /* ok, if it isn't a directory, assume we can open it */ 417 /* ok, if it isn't a directory, assume we can open it */
201 if (!S_ISDIR(st_top.st_mode)) { 418 if (!S_ISDIR(st_top.st_mode)) {
202 scanelf_file(path); 419 scanelf_file(path);
203 return; 420 return;
208 warnf("could not opendir %s: %s", path, strerror(errno)); 425 warnf("could not opendir %s: %s", path, strerror(errno));
209 return; 426 return;
210 } 427 }
211 if (be_verbose) printf("%s: scanning dir\n", path); 428 if (be_verbose) printf("%s: scanning dir\n", path);
212 429
430 pathlen = strlen(path);
213 while ((dentry = readdir(dir))) { 431 while ((dentry = readdir(dir))) {
214 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, "..")) 432 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
215 continue; 433 continue;
216 len = (strlen(path) + 2 + strlen(dentry->d_name)); 434 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
217 assert(len < sizeof(buf)); 435 if (len >= sizeof(buf)) {
218 strncpy(buf, path, len); 436 warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf));
219 strncat(buf, "/", len); 437 continue;
220 strncat(buf, dentry->d_name, len); 438 }
221 buf[sizeof(buf)] = 0; 439 sprintf(buf, "%s/%s", path, dentry->d_name);
222 if (lstat(buf, &st) != -1) { 440 if (lstat(buf, &st) != -1) {
223 if (S_ISREG(st.st_mode)) 441 if (S_ISREG(st.st_mode))
224 scanelf_file(buf); 442 scanelf_file(buf);
225 else if (dir_recurse && S_ISDIR(st.st_mode)) { 443 else if (dir_recurse && S_ISDIR(st.st_mode)) {
226 if (dir_crossmount || (st_top.st_dev == st.st_dev)) 444 if (dir_crossmount || (st_top.st_dev == st.st_dev))
241 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
242 err("Unable to open ld.so.conf: %s", strerror(errno)); 460 err("Unable to open ld.so.conf: %s", strerror(errno));
243 461
244 scan_l = scan_ul = scan_ull = 0; 462 scan_l = scan_ul = scan_ull = 0;
245 463
246 path = malloc(_POSIX_PATH_MAX); 464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) {
465 warn("Can not malloc() memory for ldpath scanning");
466 return;
467 }
247 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) 468 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL)
248 if (*path == '/') { 469 if (*path == '/') {
249 if ((p = strrchr(path, '\r')) != NULL) 470 if ((p = strrchr(path, '\r')) != NULL)
250 *p = 0; 471 *p = 0;
251 if ((p = strrchr(path, '\n')) != NULL) 472 if ((p = strrchr(path, '\n')) != NULL)
254 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1; 475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1;
255 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1; 476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1;
256 scanelf_dir(path); 477 scanelf_dir(path);
257 } 478 }
258 free(path); 479 free(path);
480 fclose(fp);
259 481
260 if (!scan_l) scanelf_dir("/lib"); 482 if (!scan_l) scanelf_dir("/lib");
261 if (!scan_ul) scanelf_dir("/usr/lib"); 483 if (!scan_ul) scanelf_dir("/usr/lib");
262 if (!scan_ull) scanelf_dir("/usr/local/lib"); 484 if (!scan_ull) scanelf_dir("/usr/local/lib");
263
264 fclose(fp);
265} 485}
266 486
267/* scan env PATH for paths */ 487/* scan env PATH for paths */
268static void scanelf_envpath() 488static void scanelf_envpath()
269{ 489{
272 path = getenv("PATH"); 492 path = getenv("PATH");
273 if (!path) 493 if (!path)
274 err("PATH is not set in your env !"); 494 err("PATH is not set in your env !");
275 495
276 if ((path = strdup(path)) == NULL) 496 if ((path = strdup(path)) == NULL)
277 err("stdup failed: %s", strerror(errno)); 497 err("strdup failed: %s", strerror(errno));
278 498
279 while ((p = strrchr(path, ':')) != NULL) { 499 while ((p = strrchr(path, ':')) != NULL) {
280 scanelf_dir(p + 1); 500 scanelf_dir(p + 1);
281 *p = 0; 501 *p = 0;
282 } 502 }
285} 505}
286 506
287 507
288 508
289/* usage / invocation handling functions */ 509/* usage / invocation handling functions */
290#define PARSE_FLAGS "plRmxetraqvBhV" 510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV"
511#define a_argument required_argument
291static struct option const long_opts[] = { 512static struct option const long_opts[] = {
292 {"path", no_argument, NULL, 'p'}, 513 {"path", no_argument, NULL, 'p'},
293 {"ldpath", no_argument, NULL, 'l'}, 514 {"ldpath", no_argument, NULL, 'l'},
294 {"recursive", no_argument, NULL, 'R'}, 515 {"recursive", no_argument, NULL, 'R'},
295 {"mount", no_argument, NULL, 'm'}, 516 {"mount", no_argument, NULL, 'm'},
517 {"symlink", no_argument, NULL, 'y'},
296 {"pax", no_argument, NULL, 'x'}, 518 {"pax", no_argument, NULL, 'x'},
297 {"header", no_argument, NULL, 'e'}, 519 {"header", no_argument, NULL, 'e'},
298 {"textrel", no_argument, NULL, 't'}, 520 {"textrel", no_argument, NULL, 't'},
299 {"rpath", no_argument, NULL, 'r'}, 521 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'},
524 {"symbol", a_argument, NULL, 's'},
300 {"all", no_argument, NULL, 'a'}, 525 {"all", no_argument, NULL, 'a'},
301 {"quiet", no_argument, NULL, 'q'}, 526 {"quiet", no_argument, NULL, 'q'},
302 {"verbose", no_argument, NULL, 'v'}, 527 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'},
529 {"file", a_argument, NULL, 'o'},
303 {"nobanner", no_argument, NULL, 'B'}, 530 {"nobanner", no_argument, NULL, 'B'},
304 {"help", no_argument, NULL, 'h'}, 531 {"help", no_argument, NULL, 'h'},
305 {"version", no_argument, NULL, 'V'}, 532 {"version", no_argument, NULL, 'V'},
306 {NULL, no_argument, NULL, 0x0} 533 {NULL, no_argument, NULL, 0x0}
307}; 534};
308static char *opts_help[] = { 535static char *opts_help[] = {
309 "Scan all directories in PATH environment", 536 "Scan all directories in PATH environment",
310 "Scan all directories in /etc/ld.so.conf", 537 "Scan all directories in /etc/ld.so.conf",
311 "Scan directories recursively", 538 "Scan directories recursively",
312 "Don't recursively cross mount points\n", 539 "Don't recursively cross mount points",
540 "Don't scan symlinks\n",
313 "Print PaX markings", 541 "Print PaX markings",
314 "Print GNU_STACK markings", 542 "Print GNU_STACK markings",
315 "Print TEXTREL information", 543 "Print TEXTREL information",
316 "Print RPATH information", 544 "Print RPATH information",
545 "Print NEEDED information",
546 "Print INTERP information",
547 "Find a specified symbol",
317 "Print all scanned info (-x -e -t -r)\n", 548 "Print all scanned info (-x -e -t -r)\n",
318 "Only output 'bad' things", 549 "Only output 'bad' things",
319 "Be verbose (can be specified more than once)", 550 "Be verbose (can be specified more than once)",
551 "Use specified format for output",
552 "Write output stream to a filename",
320 "Don't display the header", 553 "Don't display the header",
321 "Print this help and exit", 554 "Print this help and exit",
322 "Print version and exit", 555 "Print version and exit",
323 NULL 556 NULL
324}; 557};
326/* display usage and exit */ 559/* display usage and exit */
327static void usage(int status) 560static void usage(int status)
328{ 561{
329 int i; 562 int i;
330 printf(" Scan ELF binaries for stuff\n\n" 563 printf(" Scan ELF binaries for stuff\n\n"
331 "Usage: %s [options] <dir1> [dir2 dirN ...]\n\n", argv0); 564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
332 fputs("Options:\n", stdout); 565 printf("Options: -[%s]\n", PARSE_FLAGS);
333 for (i = 0; long_opts[i].name; ++i) 566 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument)
334 printf(" -%c, --%-12s %s\n", long_opts[i].val, 568 printf(" -%c, --%-13s %s\n", long_opts[i].val,
335 long_opts[i].name, opts_help[i]); 569 long_opts[i].name, opts_help[i]);
336#ifdef MANLYPAGE 570 else
337 for (i = 0; long_opts[i].name; ++i) 571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val,
338 printf(".TP\n\\fB\\-%c, \\-\\-%s\\fR\n%s\n", long_opts[i].val,
339 long_opts[i].name, opts_help[i]); 572 long_opts[i].name, opts_help[i]);
340#endif
341 exit(status); 573 exit(status);
342} 574}
343 575
344/* parse command line arguments and preform needed actions */ 576/* parse command line arguments and preform needed actions */
345static void parseargs(int argc, char *argv[]) 577static void parseargs(int argc, char *argv[])
348 580
349 opterr = 0; 581 opterr = 0;
350 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) { 582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
351 switch (flag) { 583 switch (flag) {
352 584
353 case 'V': /* version info */ 585 case 'V':
354 printf("%s compiled %s\n%s\n" 586 printf("%s compiled %s\n%s\n"
355 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n", 587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
356 __FILE__, __DATE__, rcsid, argv0); 588 __FILE__, __DATE__, rcsid, argv0);
357 exit(EXIT_SUCCESS); 589 exit(EXIT_SUCCESS);
358 break; 590 break;
359 case 's': /* reserved for -s, --symbol= */
360 case 'h': usage(EXIT_SUCCESS); break; 591 case 'h': usage(EXIT_SUCCESS); break;
361 592
593 case 'o': {
594 FILE *fp = NULL;
595 fp = freopen(optarg, "w", stdout);
596 if (fp == NULL)
597 err("Could not open output stream '%s': %s", optarg, strerror(errno));
598 stdout = fp;
599 break;
600 }
601
602 case 's': {
603 size_t len;
604 find_sym = strdup(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;
611 versioned_symname = (char *)malloc(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);
619 break;
620 }
621
622 case 'F': {
623 out_format = strdup(optarg);
624 if (!out_format)
625 err("Could not malloc() mem for output format");
626 break;
627 }
628
629 case 'y': scan_symlink = 0; break;
362 case 'B': show_banner = 0; break; 630 case 'B': show_banner = 0; break;
363 case 'l': scan_ldpath = 1; break; 631 case 'l': scan_ldpath = 1; break;
364 case 'p': scan_envpath = 1; break; 632 case 'p': scan_envpath = 1; break;
365 case 'R': dir_recurse = 1; break; 633 case 'R': dir_recurse = 1; break;
366 case 'm': dir_crossmount = 0; break; 634 case 'm': dir_crossmount = 0; break;
367 case 'x': show_pax = 1; break; 635 case 'x': show_pax = 1; break;
368 case 'e': show_stack = 1; break; 636 case 'e': show_stack = 1; break;
369 case 't': show_textrel = 1; break; 637 case 't': show_textrel = 1; break;
370 case 'r': show_rpath = 1; break; 638 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break;
371 case 'q': be_quiet = 1; break; 641 case 'q': be_quiet = 1; break;
372 case 'v': be_verbose = (be_verbose % 20) + 1; break; 642 case 'v': be_verbose = (be_verbose % 20) + 1; break;
373 case 'a': show_pax = show_stack = show_textrel = show_rpath = 1; break; 643 case 'a': show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 1; break;
374 644
375 case ':': 645 case ':':
376 warn("Option missing parameter"); 646 warn("Option missing parameter\n");
377 usage(EXIT_FAILURE); 647 usage(EXIT_FAILURE);
378 break; 648 break;
379 case '?': 649 case '?':
380 warn("Unknown option"); 650 warn("Unknown option\n");
381 usage(EXIT_FAILURE); 651 usage(EXIT_FAILURE);
382 break; 652 break;
383 default: 653 default:
384 err("Unhandled option '%c'", flag); 654 err("Unhandled option '%c'", flag);
385 break; 655 break;
387 } 657 }
388 658
389 if (be_quiet && be_verbose) 659 if (be_quiet && be_verbose)
390 err("You can be quiet or you can be verbose, not both, stupid"); 660 err("You can be quiet or you can be verbose, not both, stupid");
391 661
662 /* let the format option override all other options */
663 if (out_format) {
664 show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 0;
665 for (flag=0; out_format[flag]; ++flag) {
666 if (out_format[flag] != '%') continue;
667
668 switch (out_format[++flag]) {
669 case '%': break;
670 case 'F': break;
671 case 's': break;
672 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break;
674 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break;
677 case 'i': show_interp = 1; break;
678 default:
679 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1);
681 }
682 }
683 }
684
685 /* now lets actually do the scanning */
392 if (scan_ldpath) scanelf_ldpath(); 686 if (scan_ldpath) scanelf_ldpath();
393 if (scan_envpath) scanelf_envpath(); 687 if (scan_envpath) scanelf_envpath();
688 if (optind == argc && !scan_ldpath && !scan_envpath)
689 err("Nothing to scan !?");
394 while (optind < argc) 690 while (optind < argc)
395 scanelf_dir(argv[optind++]); 691 scanelf_dir(argv[optind++]);
692
693 /* clean up */
694 if (find_sym) {
695 free(find_sym);
696 free(versioned_symname);
697 }
698 if (out_format) free(out_format);
396} 699}
397 700
398 701
399 702
400int main(int argc, char *argv[]) 703int main(int argc, char *argv[])
401{ 704{
402 if (argc < 2) 705 if (argc < 2)
403 usage(EXIT_FAILURE); 706 usage(EXIT_FAILURE);
404 parseargs(argc, argv); 707 parseargs(argc, argv);
708 fclose(stdout);
405 return EXIT_SUCCESS; 709 return EXIT_SUCCESS;
406} 710}

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