/[gentoo-projects]/pax-utils/scanelf.c
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Revision 1.40 Revision 1.41
1/* 1/*
2 * Copyright 2003 Ned Ludd <solar@gentoo.org> 2 * Copyright 2003 Ned Ludd <solar@gentoo.org>
3 * Copyright 1999-2005 Gentoo Foundation 3 * Copyright 1999-2005 Gentoo Foundation
4 * Distributed under the terms of the GNU General Public License v2 4 * Distributed under the terms of the GNU General Public License v2
5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.40 2005/04/21 00:13:03 solar Exp $ 5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/Attic/scanelf.c,v 1.41 2005/05/06 01:01:42 vapier Exp $
6 * 6 *
7 ******************************************************************** 7 ********************************************************************
8 * This program is free software; you can redistribute it and/or 8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as 9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the 10 * published by the Free Software Foundation; either version 2 of the
33#include <getopt.h> 33#include <getopt.h>
34#include <assert.h> 34#include <assert.h>
35 35
36#include "paxelf.h" 36#include "paxelf.h"
37 37
38static const char *rcsid = "$Id: scanelf.c,v 1.40 2005/04/21 00:13:03 solar Exp $"; 38static const char *rcsid = "$Id: scanelf.c,v 1.41 2005/05/06 01:01:42 vapier Exp $";
39#define argv0 "scanelf" 39#define argv0 "scanelf"
40 40
41 41
42 42
43/* prototypes */ 43/* prototypes */
45static void scanelf_dir(const char *path); 45static void scanelf_dir(const char *path);
46static void scanelf_ldpath(); 46static void scanelf_ldpath();
47static void scanelf_envpath(); 47static void scanelf_envpath();
48static void usage(int status); 48static void usage(int status);
49static void parseargs(int argc, char *argv[]); 49static void parseargs(int argc, char *argv[]);
50static char *xstrdup(char *s);
51static void *xmalloc(size_t size);
52static void xstrcat(char **dst, const char *src, size_t *curr_len);
53static inline void xchrcat(char **dst, const char append, size_t *curr_len);
54static int xemptybuffer(const char *buff);
50 55
51/* variables to control behavior */ 56/* variables to control behavior */
52static char scan_ldpath = 0; 57static char scan_ldpath = 0;
53static char scan_envpath = 0; 58static char scan_envpath = 0;
54static char scan_symlink = 1; 59static char scan_symlink = 1;
67static char *out_format = NULL; 72static char *out_format = NULL;
68 73
69 74
70 75
71/* sub-funcs for scanelf_file() */ 76/* sub-funcs for scanelf_file() */
72static void scanelf_file_pax(elfobj *elf, char *found_pax) 77static char *scanelf_file_pax(elfobj *elf, char *found_pax)
73{ 78{
74 char *paxflags; 79 static char *paxflags;
80
75 if (!show_pax) return; 81 if (!show_pax) return NULL;
76 82
77 paxflags = pax_short_hf_flags(PAX_FLAGS(elf)); 83 paxflags = pax_short_hf_flags(PAX_FLAGS(elf));
78 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) { 84 if (!be_quiet || (be_quiet && strncmp(paxflags, "PeMRxS", 6))) {
79 *found_pax = 1; 85 *found_pax = 1;
80 printf("%s ", pax_short_hf_flags(PAX_FLAGS(elf))); 86 return paxflags;
81 } 87 }
88
89 return NULL;
82} 90}
83static void scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro) 91static char *scanelf_file_stack(elfobj *elf, char *found_stack, char *found_relro)
84{ 92{
85 int i; 93 static char ret[7];
94 char *found;
95 int i, off, shown;
96
86 if (!show_stack) return; 97 if (!show_stack) return NULL;
98
99 shown = 0;
100 sprintf(ret, "--- ---");
87#define SHOW_STACK(B) \ 101#define SHOW_STACK(B) \
88 if (elf->elf_class == ELFCLASS ## B) { \ 102 if (elf->elf_class == ELFCLASS ## B) { \
89 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 103 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
90 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 104 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
91 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 105 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
92 if (EGET(phdr[i].p_type) != PT_GNU_STACK && \ 106 if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
107 found = found_stack; \
108 off = 0; \
93 EGET(phdr[i].p_type) != PT_GNU_RELRO) continue; \ 109 } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
110 found = found_relro; \
111 off = 3; \
112 } else \
113 continue; \
94 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \ 114 if (be_quiet && !(EGET(phdr[i].p_flags) & PF_X)) \
95 continue; \ 115 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))); \ 116 memcpy(ret+off, gnu_short_stack_flags(EGET(phdr[i].p_flags)), 3); \
117 *found = 1; \
118 ++shown; \
101 } \ 119 } \
102 } 120 }
103 SHOW_STACK(32) 121 SHOW_STACK(32)
104 SHOW_STACK(64) 122 SHOW_STACK(64)
105 if (!be_quiet && !*found_stack) printf("--- "); 123 if (be_quiet && !shown)
106 if (!be_quiet && !*found_relro) printf("--- "); 124 return NULL;
125 else
126 return ret;
107} 127}
108static void scanelf_file_textrel(elfobj *elf, char *found_textrel) 128static char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
109{ 129{
130 static char *ret = "TEXTREL";
110 int i; 131 int i;
132
111 if (!show_textrel) return; 133 if (!show_textrel) return NULL;
134
112#define SHOW_TEXTREL(B) \ 135#define SHOW_TEXTREL(B) \
113 if (elf->elf_class == ELFCLASS ## B) { \ 136 if (elf->elf_class == ELFCLASS ## B) { \
114 Elf ## B ## _Dyn *dyn; \ 137 Elf ## B ## _Dyn *dyn; \
115 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \ 138 Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
116 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \ 139 Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
119 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 142 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
120 while (EGET(dyn->d_tag) != DT_NULL) { \ 143 while (EGET(dyn->d_tag) != DT_NULL) { \
121 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \ 144 if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
122 *found_textrel = 1; \ 145 *found_textrel = 1; \
123 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \ 146 /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
124 printf("TEXTREL "); \ 147 return ret; \
125 } \ 148 } \
126 ++dyn; \ 149 ++dyn; \
127 } \ 150 } \
128 } } 151 } }
129 SHOW_TEXTREL(32) 152 SHOW_TEXTREL(32)
130 SHOW_TEXTREL(64) 153 SHOW_TEXTREL(64)
131 if (!be_quiet && !*found_textrel) printf("------- "); 154 if (be_quiet)
155 return NULL;
156 else
157 return " - ";
132} 158}
133static void scanelf_file_rpath(elfobj *elf, char *found_rpath) 159static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
134{ 160{
135 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */ 161 /* TODO: if be_quiet, only output RPATH's which aren't in /etc/ld.so.conf */
136 int i; 162 int i;
137 char *rpath, *runpath; 163 char *rpath, *runpath;
138 void *strtbl_void; 164 void *strtbl_void;
152 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \ 178 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
153 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 179 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
154 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 180 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
155 while (EGET(dyn->d_tag) != DT_NULL) { \ 181 while (EGET(dyn->d_tag) != DT_NULL) { \
156 if (EGET(dyn->d_tag) == DT_RPATH) { \ 182 if (EGET(dyn->d_tag) == DT_RPATH) { \
183 if (rpath) warn("ELF has multiple DT_RPATH's !?"); \
157 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 184 rpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
158 *found_rpath = 1; \ 185 *found_rpath = 1; \
159 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \ 186 } else if (EGET(dyn->d_tag) == DT_RUNPATH) { \
187 if (runpath) warn("ELF has multiple DT_RUNPATH's !?"); \
160 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 188 runpath = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
161 *found_rpath = 1; \ 189 *found_rpath = 1; \
162 } \ 190 } \
163 ++dyn; \ 191 ++dyn; \
164 } \ 192 } \
165 } } 193 } }
166 SHOW_RPATH(32) 194 SHOW_RPATH(32)
167 SHOW_RPATH(64) 195 SHOW_RPATH(64)
168 } 196 }
197
169 if (rpath && runpath) { 198 if (rpath && runpath) {
170 if (!strcmp(rpath, runpath)) 199 if (!strcmp(rpath, runpath)) {
171 printf("%-5s ", runpath); 200 xstrcat(ret, runpath, ret_len);
172 else { 201 } else {
173 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath); 202 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
174 printf("{%s,%s} ", rpath, runpath); 203 xchrcat(ret, '{', ret_len);
204 xstrcat(ret, rpath, ret_len);
205 xchrcat(ret, ',', ret_len);
206 xstrcat(ret, runpath, ret_len);
207 xchrcat(ret, '}', ret_len);
175 } 208 }
176 } else if (rpath || runpath) 209 } else if (rpath || runpath)
177 printf("%-5s ", (runpath ? runpath : rpath)); 210 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
178 else if (!be_quiet && !*found_rpath) 211 else if (!be_quiet)
179 printf(" - "); 212 xstrcat(ret, " - ", ret_len);
180} 213}
181static void scanelf_file_needed(elfobj *elf, char *found_needed) 214static void scanelf_file_needed(elfobj *elf, char *found_needed, char **ret, size_t *ret_len)
182{ 215{
183 int i; 216 int i;
184 char *needed; 217 char *needed;
185 void *strtbl_void; 218 void *strtbl_void;
186 219
199 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \ 232 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
200 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \ 233 dyn = DYN ## B (elf->data + EGET(phdr[i].p_offset)); \
201 while (EGET(dyn->d_tag) != DT_NULL) { \ 234 while (EGET(dyn->d_tag) != DT_NULL) { \
202 if (EGET(dyn->d_tag) == DT_NEEDED) { \ 235 if (EGET(dyn->d_tag) == DT_NEEDED) { \
203 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \ 236 needed = elf->data + EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
204 if (*found_needed) printf(","); \ 237 if (*found_needed) xchrcat(ret, ',', ret_len); \
205 printf("%s", needed); \ 238 xstrcat(ret, needed, ret_len); \
206 *found_needed = 1; \ 239 *found_needed = 1; \
207 } \ 240 } \
208 ++dyn; \ 241 ++dyn; \
209 } \ 242 } \
210 } } 243 } }
211 SHOW_NEEDED(32) 244 SHOW_NEEDED(32)
212 SHOW_NEEDED(64) 245 SHOW_NEEDED(64)
213 } 246 }
214 if (!be_quiet && !*found_needed)
215 printf(" - ");
216 else if (*found_needed)
217 printf(" ");
218} 247}
219static void scanelf_file_interp(elfobj *elf, char *found_interp) 248static char *scanelf_file_interp(elfobj *elf, char *found_interp)
220{ 249{
221 void *strtbl_void; 250 void *strtbl_void;
222 251
223 if (!show_interp) return; 252 if (!show_interp) return NULL;
224 253
225 strtbl_void = elf_findsecbyname(elf, ".interp"); 254 strtbl_void = elf_findsecbyname(elf, ".interp");
226 255
227 if (strtbl_void) { 256 if (strtbl_void) {
228#define SHOW_INTERP(B) \ 257#define SHOW_INTERP(B) \
229 if (elf->elf_class == ELFCLASS ## B) { \ 258 if (elf->elf_class == ELFCLASS ## B) { \
230 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \ 259 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
231 printf("%s ", elf->data + EGET(strtbl->sh_offset)); \
232 *found_interp = 1; \ 260 *found_interp = 1; \
261 return elf->data + EGET(strtbl->sh_offset); \
233 } 262 }
234 SHOW_INTERP(32) 263 SHOW_INTERP(32)
235 SHOW_INTERP(64) 264 SHOW_INTERP(64)
236 } 265 }
237 if (!be_quiet && !*found_interp) 266 return NULL;
238 printf(" - ");
239 else if (*found_interp)
240 printf(" ");
241} 267}
242static void scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename) 268static char *scanelf_file_sym(elfobj *elf, char *found_sym, const char *filename)
243{ 269{
244 int i; 270 int i;
245 void *symtab_void, *strtab_void; 271 void *symtab_void, *strtab_void;
246 272
247 if (!find_sym) return; 273 if (!find_sym) return NULL;
248 274
249 symtab_void = elf_findsecbyname(elf, ".symtab"); 275 symtab_void = elf_findsecbyname(elf, ".symtab");
250 strtab_void = elf_findsecbyname(elf, ".strtab"); 276 strtab_void = elf_findsecbyname(elf, ".strtab");
251 277
252 if (symtab_void && strtab_void) { 278 if (symtab_void && strtab_void) {
275 ++sym; \ 301 ++sym; \
276 } } 302 } }
277 FIND_SYM(32) 303 FIND_SYM(32)
278 FIND_SYM(64) 304 FIND_SYM(64)
279 } 305 }
280 if (*find_sym != '*') { 306 if (*find_sym != '*' && *found_sym)
281 if (*found_sym) 307 return find_sym;
282 printf(" %s ", find_sym);
283 else if (!be_quiet) 308 if (be_quiet)
284 printf(" - "); 309 return NULL;
285 } 310 else
311 return " - ";
286} 312}
287/* scan an elf file and show all the fun stuff */ 313/* scan an elf file and show all the fun stuff */
314#define prints(str) fputs(str, stdout)
288static void scanelf_file(const char *filename) 315static void scanelf_file(const char *filename)
289{ 316{
290 int i; 317 int i;
291 char found_pax, found_stack, found_relro, found_textrel, 318 char found_pax, found_stack, found_relro, found_textrel,
292 found_rpath, found_needed, found_interp, found_sym, 319 found_rpath, found_needed, found_interp, found_sym,
293 found_file; 320 found_file;
294 elfobj *elf; 321 elfobj *elf;
295 struct stat st; 322 struct stat st;
323 static char *out_buffer = NULL;
324 static size_t out_len;
296 325
297 /* make sure 'filename' exists */ 326 /* make sure 'filename' exists */
298 if (lstat(filename, &st) == -1) { 327 if (lstat(filename, &st) == -1) {
299 if (be_verbose > 2) printf("%s: does not exist\n", filename); 328 if (be_verbose > 2) printf("%s: does not exist\n", filename);
300 return; 329 return;
314 if (be_verbose > 2) printf("%s: not an ELF\n", filename); 343 if (be_verbose > 2) printf("%s: not an ELF\n", filename);
315 return; 344 return;
316 } 345 }
317 346
318 if (be_verbose > 1) 347 if (be_verbose > 1)
319 printf("%s: {%s,%s} scanning file\n", filename, 348 printf("%s: scanning file {%s,%s}\n", filename,
320 get_elfeitype(elf, EI_CLASS, elf->elf_class), 349 get_elfeitype(elf, EI_CLASS, elf->elf_class),
321 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA])); 350 get_elfeitype(elf, EI_DATA, elf->data[EI_DATA]));
322 else if (be_verbose) 351 else if (be_verbose)
323 printf("%s: scanning file\n", filename); 352 printf("%s: scanning file\n", filename);
324 353
354 /* init output buffer */
355 if (!out_buffer) {
356 out_len = sizeof(char) * 80;
357 out_buffer = (char*)xmalloc(out_len);
358 }
359 *out_buffer = '\0';
360
325 /* show the header */ 361 /* show the header */
326 if (!be_quiet && show_banner) { 362 if (!be_quiet && show_banner) {
327 if (out_format) {
328 for (i=0; out_format[i]; ++i) { 363 for (i=0; out_format[i]; ++i) {
329 if (out_format[i] != '%') continue; 364 if (out_format[i] != '%') continue;
330 365
331 switch (out_format[++i]) { 366 switch (out_format[++i]) {
332 case '%': break; 367 case '%': break;
333 case 'F': printf("FILE "); break; 368 case 'F': prints("FILE "); break;
369 case 'o': prints(" TYPE "); break;
334 case 'x': printf(" PAX "); break; 370 case 'x': prints(" PAX "); break;
335 case 'e': printf("STK/REL "); break; 371 case 'e': prints("STK/REL "); break;
336 case 't': printf("TEXTREL "); break; 372 case 't': prints("TEXTREL "); break;
337 case 'r': printf("RPATH "); break; 373 case 'r': prints("RPATH "); break;
338 case 'n': printf("NEEDED "); break; 374 case 'n': prints("NEEDED "); break;
339 case 'i': printf("INTERP "); break; 375 case 'i': prints("INTERP "); break;
340 case 's': printf("SYM "); break; 376 case 's': prints("SYM "); break;
341 }
342 } 377 }
343 } else {
344 printf(" TYPE ");
345 if (show_pax) printf(" PAX ");
346 if (show_stack) printf("STK/REL ");
347 if (show_textrel) printf("TEXTREL ");
348 if (show_rpath) printf("RPATH ");
349 if (show_needed) printf("NEEDED ");
350 if (show_interp) printf("INTERP ");
351 if (find_sym) printf("SYM ");
352 } 378 }
353 if (!found_file) printf(" FILE");
354 printf("\n"); 379 prints("\n");
355 show_banner = 0; 380 show_banner = 0;
356 } 381 }
357 382
358 /* dump all the good stuff */ 383 /* 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) { 384 for (i=0; out_format[i]; ++i) {
385 const char *out;
386
387 /* make sure we trim leading spaces in quiet mode */
388 if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
389 *out_buffer = '\0';
390
364 if (out_format[i] != '%') { 391 if (out_format[i] != '%') {
365 printf("%c", out_format[i]); 392 xchrcat(&out_buffer, out_format[i], &out_len);
366 continue; 393 continue;
367 } 394 }
368 395
396 out = NULL;
369 switch (out_format[++i]) { 397 switch (out_format[++i]) {
370 case '%': printf("%%"); break; 398 case '%': xchrcat(&out_buffer, '%', &out_len); break;
371 case 'F': found_file = 1; printf("%s ", filename); break; 399 case 'F': found_file = 1; xstrcat(&out_buffer, filename, &out_len); break;
400 case 'o': out = get_elfetype(elf); break;
372 case 'x': scanelf_file_pax(elf, &found_pax); break; 401 case 'x': out = scanelf_file_pax(elf, &found_pax); break;
373 case 'e': scanelf_file_stack(elf, &found_stack, &found_relro); break; 402 case 'e': out = scanelf_file_stack(elf, &found_stack, &found_relro); break;
374 case 't': scanelf_file_textrel(elf, &found_textrel); break; 403 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
375 case 'r': scanelf_file_rpath(elf, &found_rpath); break; 404 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
376 case 'n': scanelf_file_needed(elf, &found_needed); break; 405 case 'n': scanelf_file_needed(elf, &found_needed, &out_buffer, &out_len); break;
377 case 'i': scanelf_file_interp(elf, &found_interp); break; 406 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
378 case 's': scanelf_file_sym(elf, &found_sym, filename); break; 407 case 's': out = scanelf_file_sym(elf, &found_sym, filename); break;
379 } 408 }
380 } 409 if (out) xstrcat(&out_buffer, out, &out_len);
381 } else {
382 scanelf_file_pax(elf, &found_pax);
383 scanelf_file_stack(elf, &found_stack, &found_relro);
384 scanelf_file_textrel(elf, &found_textrel);
385 scanelf_file_rpath(elf, &found_rpath);
386 scanelf_file_needed(elf, &found_needed);
387 scanelf_file_interp(elf, &found_interp);
388 scanelf_file_sym(elf, &found_sym, filename);
389 } 410 }
390 411
391 if (!found_file) { 412 if (!found_file) {
392 if (!be_quiet || found_pax || found_stack || found_textrel || \ 413 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym) 414 found_rpath || found_needed || found_interp || found_sym)
394 puts(filename); 415 xstrcat(&out_buffer, filename, &out_len);
395 } else {
396 printf("\n");
397 } 416 }
417 if (!(be_quiet && xemptybuffer(out_buffer)))
418 puts(out_buffer);
398 419
399 unreadelf(elf); 420 unreadelf(elf);
400} 421}
401 422
402/* scan a directory for ET_EXEC files and print when we find one */ 423/* scan a directory for ET_EXEC files and print when we find one */
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL) 480 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
460 err("Unable to open ld.so.conf: %s", strerror(errno)); 481 err("Unable to open ld.so.conf: %s", strerror(errno));
461 482
462 scan_l = scan_ul = scan_ull = 0; 483 scan_l = scan_ul = scan_ull = 0;
463 484
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) { 485 path = (char*)xmalloc(_POSIX_PATH_MAX);
465 warn("Can not malloc() memory for ldpath scanning");
466 return;
467 }
468 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) 486 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL)
469 if (*path == '/') { 487 if (*path == '/') {
470 if ((p = strrchr(path, '\r')) != NULL) 488 if ((p = strrchr(path, '\r')) != NULL)
471 *p = 0; 489 *p = 0;
472 if ((p = strrchr(path, '\n')) != NULL) 490 if ((p = strrchr(path, '\n')) != NULL)
490 char *path, *p; 508 char *path, *p;
491 509
492 path = getenv("PATH"); 510 path = getenv("PATH");
493 if (!path) 511 if (!path)
494 err("PATH is not set in your env !"); 512 err("PATH is not set in your env !");
495 513 path = xstrdup(path);
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498 514
499 while ((p = strrchr(path, ':')) != NULL) { 515 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1); 516 scanelf_dir(p + 1);
501 *p = 0; 517 *p = 0;
502 } 518 }
599 break; 615 break;
600 } 616 }
601 617
602 case 's': { 618 case 's': {
603 size_t len; 619 size_t len;
604 find_sym = strdup(optarg); 620 find_sym = xstrdup(optarg);
605 if (!find_sym) {
606 warnf("Could not malloc() mem for sym scan");
607 find_sym = NULL;
608 break;
609 }
610 len = strlen(find_sym) + 1; 621 len = strlen(find_sym) + 1;
611 versioned_symname = (char *)malloc(sizeof(char) * (len+1)); 622 versioned_symname = (char*)xmalloc(sizeof(char) * (len+1));
612 if (!versioned_symname) {
613 free(find_sym);
614 find_sym = NULL;
615 warnf("Could not malloc() mem for sym scan");
616 break;
617 }
618 sprintf(versioned_symname, "%s@", find_sym); 623 sprintf(versioned_symname, "%s@", find_sym);
619 break; 624 break;
620 } 625 }
621 626
622 case 'F': { 627 case 'F': {
623 out_format = strdup(optarg); 628 out_format = strdup(optarg);
624 if (!out_format)
625 err("Could not malloc() mem for output format");
626 break; 629 break;
627 } 630 }
628 631
629 case 'y': scan_symlink = 0; break; 632 case 'y': scan_symlink = 0; break;
630 case 'B': show_banner = 0; break; 633 case 'B': show_banner = 0; break;
667 670
668 switch (out_format[++flag]) { 671 switch (out_format[++flag]) {
669 case '%': break; 672 case '%': break;
670 case 'F': break; 673 case 'F': break;
671 case 's': break; 674 case 's': break;
675 case 'o': break;
672 case 'x': show_pax = 1; break; 676 case 'x': show_pax = 1; break;
673 case 'e': show_stack = 1; break; 677 case 'e': show_stack = 1; break;
674 case 't': show_textrel = 1; break; 678 case 't': show_textrel = 1; break;
675 case 'r': show_rpath = 1; break; 679 case 'r': show_rpath = 1; break;
676 case 'n': show_needed = 1; break; 680 case 'n': show_needed = 1; break;
678 default: 682 default:
679 err("Invalid format specifier '%c' (byte %i)", 683 err("Invalid format specifier '%c' (byte %i)",
680 out_format[flag], flag+1); 684 out_format[flag], flag+1);
681 } 685 }
682 } 686 }
687
688 /* construct our default format */
689 } else {
690 size_t fmt_len = 30;
691 out_format = (char*)xmalloc(sizeof(char) * fmt_len);
692 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
693 if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
694 if (show_stack) xstrcat(&out_format, "%e ", &fmt_len);
695 if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
696 if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
697 if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
698 if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
699 if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
700 if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
683 } 701 }
702 if (be_verbose > 2) printf("Format: %s\n", out_format);
684 703
685 /* now lets actually do the scanning */ 704 /* now lets actually do the scanning */
686 if (scan_ldpath) scanelf_ldpath(); 705 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath(); 706 if (scan_envpath) scanelf_envpath();
688 if (optind == argc && !scan_ldpath && !scan_envpath) 707 if (optind == argc && !scan_ldpath && !scan_envpath)
698 if (out_format) free(out_format); 717 if (out_format) free(out_format);
699} 718}
700 719
701 720
702 721
722/* utility funcs */
723static char *xstrdup(char *s)
724{
725 char *ret = strdup(s);
726 if (!ret) err("Could not strdup(): %s", strerror(errno));
727 return ret;
728}
729static void *xmalloc(size_t size)
730{
731 void *ret = malloc(size);
732 if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
733 return ret;
734}
735static void xstrcat(char **dst, const char *src, size_t *curr_len)
736{
737 long new_len;
738
739 new_len = strlen(*dst) + strlen(src);
740 if (*curr_len <= new_len) {
741 *curr_len = new_len + (*curr_len / 2);
742 *dst = realloc(*dst, *curr_len);
743 if (!*dst)
744 err("could not realloc %li bytes", (unsigned long)*curr_len);
745 }
746
747 strcat(*dst, src);
748}
749static inline void xchrcat(char **dst, const char append, size_t *curr_len)
750{
751 static char my_app[2];
752 my_app[0] = append;
753 my_app[1] = '\0';
754 xstrcat(dst, my_app, curr_len);
755}
756static int xemptybuffer(const char *buff)
757{
758 long i;
759 for (i=0; buff[i]; ++i)
760 if (buff[i] != ' ')
761 return 0;
762 return 1;
763}
764
765
766
703int main(int argc, char *argv[]) 767int main(int argc, char *argv[])
704{ 768{
705 if (argc < 2) 769 if (argc < 2)
706 usage(EXIT_FAILURE); 770 usage(EXIT_FAILURE);
707 parseargs(argc, argv); 771 parseargs(argc, argv);

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