/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.33 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 1.33 2005/04/10 15:15:40 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
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 1.33 2005/04/10 15:15:40 solar Exp $"; 38static const char *rcsid = "$Id: scanelf.c,v 1.40 2005/04/21 00:13:03 solar 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);
60static void parseargs(int argc, char *argv[]); 49static void parseargs(int argc, char *argv[]);
61 50
62/* variables to control behavior */ 51/* variables to control behavior */
63static char scan_ldpath = 0; 52static char scan_ldpath = 0;
64static char scan_envpath = 0; 53static char scan_envpath = 0;
54static char scan_symlink = 1;
65static char dir_recurse = 0; 55static char dir_recurse = 0;
66static char dir_crossmount = 1; 56static char dir_crossmount = 1;
67static char show_pax = 0; 57static char show_pax = 0;
68static char show_stack = 0; 58static char show_stack = 0;
69static char show_textrel = 0; 59static char show_textrel = 0;
70static char show_rpath = 0; 60static char show_rpath = 0;
71static char show_needed = 0; 61static char show_needed = 0;
62static char show_interp = 0;
72static char show_banner = 1; 63static char show_banner = 1;
73static char be_quiet = 0; 64static char be_quiet = 0;
74static char be_verbose = 0; 65static char be_verbose = 0;
66static char *find_sym = NULL, *versioned_symname = NULL;
75static char *find_sym = NULL; 67static char *out_format = NULL;
76 68
77 69
78 70
79/* scan an elf file and show all the fun stuff */ 71/* sub-funcs for scanelf_file() */
80static void scanelf_file(const char *filename) 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)
81{ 84{
82 int i; 85 int i;
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
88 /* make sure path exists */
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
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));
127 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
128 found_pax = 1;
129 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf)));
130 }
131 }
132
133 /* stack fun */
134 if (show_stack) { 86 if (!show_stack) return;
135#define SHOW_STACK(B) \ 87#define SHOW_STACK(B) \
136 if (elf->elf_class == ELFCLASS ## B) { \ 88 if (elf->elf_class == ELFCLASS ## B) { \
137 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
138 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
139 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
140 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \
141 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \
142 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
143 continue; \ 95 continue; \
144 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \ 96 if (EGET(phdr[i].p_type) == PT_GNU_STACK) \
145 found_stack = 1; \ 97 *found_stack = 1; \
146 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \ 98 if (EGET(phdr[i].p_type) == PT_GNU_RELRO) \
147 found_relro = 1; \ 99 *found_relro = 1; \
148 printf("%s ", gnu_short_stack_flags(EGET(phdr[i].p_flags))); \ 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; \
149 } \ 127 } \
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 } } 128 } }
176 SHOW_TEXTREL(32) 129 SHOW_TEXTREL(32)
177 SHOW_TEXTREL(64) 130 SHOW_TEXTREL(64)
178 if (!be_quiet && !found_textrel) fputs("------- ", stdout); 131 if (!be_quiet && !*found_textrel) printf("------- ");
179 } 132}
180 133static void scanelf_file_rpath(elfobj *elf, char *found_rpath)
181 /* rpath fun */ 134{
182 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */
183 if (show_rpath) { 136 int i;
184 char *rpath, *runpath; 137 char *rpath, *runpath;
138 void *strtbl_void;
139
140 if (!show_rpath) return;
141
185 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 142 strtbl_void = elf_findsecbyname(elf, ".dynstr");
186 rpath = runpath = NULL; 143 rpath = runpath = NULL;
187 144
188 if (strtbl_void) { 145 if (strtbl_void) {
189#define SHOW_RPATH(B) \ 146#define SHOW_RPATH(B) \
190 if (elf->elf_class == ELFCLASS ## B) { \ 147 if (elf->elf_class == ELFCLASS ## B) { \
191 Elf ## B ## _Dyn *dyn; \ 148 Elf ## B ## _Dyn *dyn; \
192 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 149 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
193 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 150 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
196 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
197 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
198 while (EGET(dyn->d_tag) != DT_NULL) { \ 155 while (EGET(dyn->d_tag) != DT_NULL) { \
199 if (EGET(dyn->d_tag) == DT_RPATH) { \ 156 if (EGET(dyn->d_tag) == DT_RPATH) { \
200 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
201 found_rpath = 1; \ 158 *found_rpath = 1; \
202 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \ 159 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \
203 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 160 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 found_rpath = 1; \ 161 *found_rpath = 1; \
205 } \ 162 } \
206 ++dyn; \ 163 ++dyn; \
207 } \ 164 } \
208 } } 165 } }
209 SHOW_RPATH(32) 166 SHOW_RPATH(32)
210 SHOW_RPATH(64) 167 SHOW_RPATH(64)
211 } 168 }
212 if (rpath && runpath) { 169 if (rpath && runpath) {
213 if (!strcmp(rpath, runpath)) 170 if (!strcmp(rpath, runpath))
214 printf("%-5s ", runpath); 171 printf("%-5s ", runpath);
215 else { 172 else {
216 fprintf(stderr, "%s's RPATH [%s] != RUNPATH [%s]\n", filename, rpath, runpath); 173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
217 printf("{%s,%s} ", rpath, runpath); 174 printf("{%s,%s} ", rpath, runpath);
218 } 175 }
219 } else if (rpath || runpath) 176 } else if (rpath || runpath)
220 printf("%-5s ", (runpath ? runpath : rpath)); 177 printf("%-5s ", (runpath ? runpath : rpath));
221 else if (!be_quiet && !found_rpath) 178 else if (!be_quiet && !*found_rpath)
222 printf(" - "); 179 printf(" - ");
223 } 180}
224 181static void scanelf_file_needed(elfobj *elf, char *found_needed)
225 /* print out all the NEEDED entries */ 182{
226 if (show_needed) { 183 int i;
227 char *needed; 184 char *needed;
185 void *strtbl_void;
186
187 if (!show_needed) return;
188
228 void *strtbl_void = elf_findsecbyname(elf, ".dynstr"); 189 strtbl_void = elf_findsecbyname(elf, ".dynstr");
229 190
230 if (strtbl_void) { 191 if (strtbl_void) {
231#define SHOW_NEEDED(B) \ 192#define SHOW_NEEDED(B) \
232 if (elf->elf_class == ELFCLASS ## B) { \ 193 if (elf->elf_class == ELFCLASS ## B) { \
233 Elf ## B ## _Dyn *dyn; \ 194 Elf ## B ## _Dyn *dyn; \
234 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 195 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
235 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 196 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
236 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 197 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
237 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 198 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; \ 199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
244 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
245 while (EGET(dyn->d_tag) != DT_NULL) { \ 201 while (EGET(dyn->d_tag) != DT_NULL) { \
246 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 202 if (EGET(dyn->d_tag) == DT_NEEDED) { \
247 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
248 if (found_needed) printf(","); \ 204 if (*found_needed) printf(","); \
249 printf("%s", needed); \ 205 printf("%s", needed); \
250 found_needed = 1; \ 206 *found_needed = 1; \
251 } \ 207 } \
252 ++dyn; \ 208 ++dyn; \
253 } \ 209 } \
254 } } 210 } }
255 SHOW_NEEDED(32) 211 SHOW_NEEDED(32)
256 SHOW_NEEDED(64) 212 SHOW_NEEDED(64)
257 } 213 }
258 if (!be_quiet && !found_needed) 214 if (!be_quiet && !*found_needed)
259 printf(" - "); 215 printf(" - ");
260 else if (found_needed) 216 else if (*found_needed)
261 printf(" "); 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; \
262 } 233 }
263 234 SHOW_INTERP(32)
264 /* search the symbol table for a specified symbol */ 235 SHOW_INTERP(64)
265 if (find_sym) { 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;
266 void *symtab_void, *strtab_void; 245 void *symtab_void, *strtab_void;
267 char *versioned_symname;
268 size_t len;
269 246
270 len = strlen(find_sym) + 1; 247 if (!find_sym) return;
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);
277 248
278 symtab_void = elf_findsecbyname(elf, ".symtab"); 249 symtab_void = elf_findsecbyname(elf, ".symtab");
279 strtab_void = elf_findsecbyname(elf, ".strtab"); 250 strtab_void = elf_findsecbyname(elf, ".strtab");
280 251
281 if (symtab_void && strtab_void) { 252 if (symtab_void && strtab_void) {
282#define FIND_SYM(B) \ 253#define FIND_SYM(B) \
283 if (elf->elf_class == ELFCLASS ## B) { \ 254 if (elf->elf_class == ELFCLASS ## B) { \
284 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \ 255 Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
285 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \ 256 Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
286 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \ 257 Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
289 for (i = 0; i < cnt; ++i) { \ 260 for (i = 0; i < cnt; ++i) { \
290 if (sym->st_name) { \ 261 if (sym->st_name) { \
291 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \ 262 symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
292 if (*find_sym == '*') { \ 263 if (*find_sym == '*') { \
293 printf("%s(%s) %5lX %15s %s\n", \ 264 printf("%s(%s) %5lX %15s %s\n", \
294 ((found_sym == 0) ? "\n\t" : "\t"), \ 265 ((*found_sym == 0) ? "\n\t" : "\t"), \
295 (char *)basename(filename), \ 266 (char *)basename(filename), \
296 (long)sym->st_size, \ 267 (long)sym->st_size, \
297 (char *)get_elfstttype(sym->st_info), \ 268 (char *)get_elfstttype(sym->st_info), \
298 symname); \ 269 symname); \
299 found_sym = 1; \ 270 *found_sym = 1; \
300 } else if ((strcmp(find_sym, symname) == 0) || \ 271 } else if ((strcmp(find_sym, symname) == 0) || \
301 (strncmp(symname, versioned_symname, len) == 0)) \ 272 (strcmp(symname, versioned_symname) == 0)) \
302 found_sym++; \ 273 (*found_sym)++; \
303 } \ 274 } \
304 ++sym; \ 275 ++sym; \
305 } } 276 } }
306 FIND_SYM(32) 277 FIND_SYM(32)
307 FIND_SYM(64) 278 FIND_SYM(64)
308 } 279 }
309 free(versioned_symname);
310 if (*find_sym != '*') { 280 if (*find_sym != '*') {
311 if (found_sym) 281 if (*found_sym)
312 printf(" %s ", find_sym); 282 printf(" %s ", find_sym);
313 else if (!be_quiet) 283 else if (!be_quiet)
314 fputs(" - ", stdout); 284 printf(" - ");
285 }
286}
287/* scan an elf file and show all the fun stuff */
288static void scanelf_file(const char *filename)
289{
290 int i;
291 char found_pax, found_stack, found_relro, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym,
293 found_file;
294 elfobj *elf;
295 struct stat st;
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
308 found_pax = found_stack = found_relro = found_textrel = \
309 found_rpath = found_needed = found_interp = found_sym = \
310 found_file = 0;
311
312 /* verify this is real ELF */
313 if ((elf = readelf(filename)) == NULL) {
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return;
316 }
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)
323 printf("%s: scanning file\n", filename);
324
325 /* show the header */
326 if (!be_quiet && show_banner) {
327 if (out_format) {
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 }
315 } 342 }
343 } else {
344 printf(" TYPE ");
345 if (show_pax) printf(" PAX ");
346 if (show_stack) printf("STK/REL ");
347 if (show_textrel) printf("TEXTREL ");
348 if (show_rpath) printf("RPATH ");
349 if (show_needed) printf("NEEDED ");
350 if (show_interp) printf("INTERP ");
351 if (find_sym) printf("SYM ");
316 } 352 }
353 if (!found_file) printf(" FILE");
354 printf("\n");
355 show_banner = 0;
356 }
317 357
358 /* dump all the good stuff */
359 if (!be_quiet && !out_format)
360 printf("%-7s ", get_elfetype(elf));
361
362 if (out_format) {
363 for (i=0; out_format[i]; ++i) {
364 if (out_format[i] != '%') {
365 printf("%c", out_format[i]);
366 continue;
367 }
368
369 switch (out_format[++i]) {
370 case '%': printf("%%"); break;
371 case 'F': found_file = 1; printf("%s ", filename); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break;
374 case 't': scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break;
379 }
380 }
381 } else {
382 scanelf_file_pax(elf, &found_pax);
383 scanelf_file_stack(elf, &found_stack, &found_relro);
384 scanelf_file_textrel(elf, &found_textrel);
385 scanelf_file_rpath(elf, &found_rpath);
386 scanelf_file_needed(elf, &found_needed);
387 scanelf_file_interp(elf, &found_interp);
388 scanelf_file_sym(elf, &found_sym, filename);
389 }
390
391 if (!found_file) {
318 if (!be_quiet || found_pax || found_stack || found_textrel || \ 392 if (!be_quiet || found_pax || found_stack || found_textrel || \
319 found_rpath || found_needed || found_sym) 393 found_rpath || found_needed || found_sym)
320 puts(filename); 394 puts(filename);
395 } else {
396 printf("\n");
397 }
321 398
322 unreadelf(elf); 399 unreadelf(elf);
323} 400}
324 401
325/* 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 */
330 struct stat st_top, st; 407 struct stat st_top, st;
331 char buf[_POSIX_PATH_MAX]; 408 char buf[_POSIX_PATH_MAX];
332 size_t pathlen = 0, len = 0; 409 size_t pathlen = 0, len = 0;
333 410
334 /* make sure path exists */ 411 /* make sure path exists */
335 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);
336 return; 414 return;
415 }
337 416
338 /* 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 */
339 if (!S_ISDIR(st_top.st_mode)) { 418 if (!S_ISDIR(st_top.st_mode)) {
340 scanelf_file(path); 419 scanelf_file(path);
341 return; 420 return;
406} 485}
407 486
408/* scan env PATH for paths */ 487/* scan env PATH for paths */
409static void scanelf_envpath() 488static void scanelf_envpath()
410{ 489{
411 char *orig_path, *path, *p; 490 char *path, *p;
412 491
413 path = getenv("PATH"); 492 path = getenv("PATH");
414 if (!path) 493 if (!path)
415 err("PATH is not set in your env !"); 494 err("PATH is not set in your env !");
416 495
417 if ((orig_path = path = strdup(path)) == NULL) 496 if ((path = strdup(path)) == NULL)
418 err("strdup failed: %s", strerror(errno)); 497 err("strdup failed: %s", strerror(errno));
419 498
420 while ((p = strrchr(path, ':')) != NULL) { 499 while ((p = strrchr(path, ':')) != NULL) {
421 scanelf_dir(p + 1); 500 scanelf_dir(p + 1);
422 *p = 0; 501 *p = 0;
423 } 502 }
424 503
425 free(orig_path); 504 free(path);
426} 505}
427 506
428 507
429 508
430/* usage / invocation handling functions */ 509/* usage / invocation handling functions */
431#define PARSE_FLAGS "plRmxetrns:aqvo:BhV" 510#define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV"
432#define a_argument required_argument 511#define a_argument required_argument
433static struct option const long_opts[] = { 512static struct option const long_opts[] = {
434 {"path", no_argument, NULL, 'p'}, 513 {"path", no_argument, NULL, 'p'},
435 {"ldpath", no_argument, NULL, 'l'}, 514 {"ldpath", no_argument, NULL, 'l'},
436 {"recursive", no_argument, NULL, 'R'}, 515 {"recursive", no_argument, NULL, 'R'},
437 {"mount", no_argument, NULL, 'm'}, 516 {"mount", no_argument, NULL, 'm'},
517 {"symlink", no_argument, NULL, 'y'},
438 {"pax", no_argument, NULL, 'x'}, 518 {"pax", no_argument, NULL, 'x'},
439 {"header", no_argument, NULL, 'e'}, 519 {"header", no_argument, NULL, 'e'},
440 {"textrel", no_argument, NULL, 't'}, 520 {"textrel", no_argument, NULL, 't'},
441 {"rpath", no_argument, NULL, 'r'}, 521 {"rpath", no_argument, NULL, 'r'},
442 {"needed", no_argument, NULL, 'n'}, 522 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'},
443 {"symbol", a_argument, NULL, 's'}, 524 {"symbol", a_argument, NULL, 's'},
444 {"all", no_argument, NULL, 'a'}, 525 {"all", no_argument, NULL, 'a'},
445 {"quiet", no_argument, NULL, 'q'}, 526 {"quiet", no_argument, NULL, 'q'},
446 {"verbose", no_argument, NULL, 'v'}, 527 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'},
447 {"file", a_argument, NULL, 'o'}, 529 {"file", a_argument, NULL, 'o'},
448 {"nobanner", no_argument, NULL, 'B'}, 530 {"nobanner", no_argument, NULL, 'B'},
449 {"help", no_argument, NULL, 'h'}, 531 {"help", no_argument, NULL, 'h'},
450 {"version", no_argument, NULL, 'V'}, 532 {"version", no_argument, NULL, 'V'},
451 {NULL, no_argument, NULL, 0x0} 533 {NULL, no_argument, NULL, 0x0}
452}; 534};
453static char *opts_help[] = { 535static char *opts_help[] = {
454 "Scan all directories in PATH environment", 536 "Scan all directories in PATH environment",
455 "Scan all directories in /etc/ld.so.conf", 537 "Scan all directories in /etc/ld.so.conf",
456 "Scan directories recursively", 538 "Scan directories recursively",
457 "Don't recursively cross mount points\n", 539 "Don't recursively cross mount points",
540 "Don't scan symlinks\n",
458 "Print PaX markings", 541 "Print PaX markings",
459 "Print GNU_STACK markings", 542 "Print GNU_STACK markings",
460 "Print TEXTREL information", 543 "Print TEXTREL information",
461 "Print RPATH information", 544 "Print RPATH information",
462 "Print NEEDED information", 545 "Print NEEDED information",
546 "Print INTERP information",
463 "Find a specified symbol", 547 "Find a specified symbol",
464 "Print all scanned info (-x -e -t -r)\n", 548 "Print all scanned info (-x -e -t -r)\n",
465 "Only output 'bad' things", 549 "Only output 'bad' things",
466 "Be verbose (can be specified more than once)", 550 "Be verbose (can be specified more than once)",
551 "Use specified format for output",
467 "Write output stream to a filename", 552 "Write output stream to a filename",
468 "Don't display the header", 553 "Don't display the header",
469 "Print this help and exit", 554 "Print this help and exit",
470 "Print version and exit", 555 "Print version and exit",
471 NULL 556 NULL
473 558
474/* display usage and exit */ 559/* display usage and exit */
475static void usage(int status) 560static void usage(int status)
476{ 561{
477 int i; 562 int i;
478 printf(" Scan ELF binaries for stuff\n" 563 printf(" Scan ELF binaries for stuff\n\n"
479 "Usage: %s [options] <dir1> [dir2 dirN ...]\n\n", argv0); 564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
480 printf("Options:\n"); 565 printf("Options: -[%s]\n", PARSE_FLAGS);
481 for (i = 0; long_opts[i].name; ++i) 566 for (i = 0; long_opts[i].name; ++i)
482 if (long_opts[i].has_arg == no_argument) 567 if (long_opts[i].has_arg == no_argument)
483 printf(" -%c, --%-13s %s\n", long_opts[i].val, 568 printf(" -%c, --%-13s %s\n", long_opts[i].val,
484 long_opts[i].name, opts_help[i]); 569 long_opts[i].name, opts_help[i]);
485 else 570 else
495 580
496 opterr = 0; 581 opterr = 0;
497 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) {
498 switch (flag) { 583 switch (flag) {
499 584
500 case 'V': /* version info */ 585 case 'V':
501 printf("%s compiled %s\n%s\n" 586 printf("%s compiled %s\n%s\n"
502 "%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",
503 __FILE__, __DATE__, rcsid, argv0); 588 __FILE__, __DATE__, rcsid, argv0);
504 exit(EXIT_SUCCESS); 589 exit(EXIT_SUCCESS);
505 break; 590 break;
512 err("Could not open output stream '%s': %s", optarg, strerror(errno)); 597 err("Could not open output stream '%s': %s", optarg, strerror(errno));
513 stdout = fp; 598 stdout = fp;
514 break; 599 break;
515 } 600 }
516 601
602 case 's': {
603 size_t len;
517 case 's': find_sym = strdup(optarg); break; 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 }
518 621
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;
519 case 'B': show_banner = 0; break; 630 case 'B': show_banner = 0; break;
520 case 'l': scan_ldpath = 1; break; 631 case 'l': scan_ldpath = 1; break;
521 case 'p': scan_envpath = 1; break; 632 case 'p': scan_envpath = 1; break;
522 case 'R': dir_recurse = 1; break; 633 case 'R': dir_recurse = 1; break;
523 case 'm': dir_crossmount = 0; break; 634 case 'm': dir_crossmount = 0; break;
524 case 'x': show_pax = 1; break; 635 case 'x': show_pax = 1; break;
525 case 'e': show_stack = 1; break; 636 case 'e': show_stack = 1; break;
526 case 't': show_textrel = 1; break; 637 case 't': show_textrel = 1; break;
527 case 'r': show_rpath = 1; break; 638 case 'r': show_rpath = 1; break;
528 case 'n': show_needed = 1; break; 639 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break;
529 case 'q': be_quiet = 1; break; 641 case 'q': be_quiet = 1; break;
530 case 'v': be_verbose = (be_verbose % 20) + 1; break; 642 case 'v': be_verbose = (be_verbose % 20) + 1; break;
531 case 'a': show_pax = show_stack = show_textrel = show_needed = show_rpath = 1; break; 643 case 'a': show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 1; break;
532 644
533 case ':': 645 case ':':
534 warn("Option missing parameter"); 646 warn("Option missing parameter\n");
535 usage(EXIT_FAILURE); 647 usage(EXIT_FAILURE);
536 break; 648 break;
537 case '?': 649 case '?':
538 warn("Unknown option"); 650 warn("Unknown option\n");
539 usage(EXIT_FAILURE); 651 usage(EXIT_FAILURE);
540 break; 652 break;
541 default: 653 default:
542 err("Unhandled option '%c'", flag); 654 err("Unhandled option '%c'", flag);
543 break; 655 break;
545 } 657 }
546 658
547 if (be_quiet && be_verbose) 659 if (be_quiet && be_verbose)
548 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");
549 661
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 */
550 if (scan_ldpath) scanelf_ldpath(); 686 if (scan_ldpath) scanelf_ldpath();
551 if (scan_envpath) scanelf_envpath(); 687 if (scan_envpath) scanelf_envpath();
552 if (optind == argc && !scan_ldpath && !scan_envpath) 688 if (optind == argc && !scan_ldpath && !scan_envpath)
553 err("Nothing to scan !?"); 689 err("Nothing to scan !?");
554 while (optind < argc) 690 while (optind < argc)
555 scanelf_dir(argv[optind++]); 691 scanelf_dir(argv[optind++]);
556 692
557 if (find_sym) free(find_sym); 693 /* clean up */
694 if (find_sym) {
695 free(find_sym);
696 free(versioned_symname);
697 }
698 if (out_format) free(out_format);
558} 699}
559 700
560 701
561 702
562int main(int argc, char *argv[]) 703int main(int argc, char *argv[])

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