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Revision 1.40 - (show annotations) (download) (as text)
Thu Apr 21 00:13:03 2005 UTC (9 years, 8 months ago) by solar
Branch: MAIN
Changes since 1.39: +5 -5 lines
File MIME type: text/x-csrc
- update README and manpage for new options.

1 /*
2 * Copyright 2003 Ned Ludd <solar@gentoo.org>
3 * Copyright 1999-2005 Gentoo Foundation
4 * Distributed under the terms of the GNU General Public License v2
5 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.39 2005/04/20 22:06:08 vapier Exp $
6 *
7 ********************************************************************
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
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21 * MA 02111-1307, USA.
22 */
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <sys/types.h>
27 #define __USE_GNU
28 #include <string.h>
29 #include <errno.h>
30 #include <unistd.h>
31 #include <sys/stat.h>
32 #include <dirent.h>
33 #include <getopt.h>
34 #include <assert.h>
35
36 #include "paxelf.h"
37
38 static const char *rcsid = "$Id: scanelf.c,v 1.39 2005/04/20 22:06:08 vapier Exp $";
39 #define argv0 "scanelf"
40
41
42
43 /* prototypes */
44 static void scanelf_file(const char *filename);
45 static void scanelf_dir(const char *path);
46 static void scanelf_ldpath();
47 static void scanelf_envpath();
48 static void usage(int status);
49 static void parseargs(int argc, char *argv[]);
50
51 /* variables to control behavior */
52 static char scan_ldpath = 0;
53 static char scan_envpath = 0;
54 static char scan_symlink = 1;
55 static char dir_recurse = 0;
56 static char dir_crossmount = 1;
57 static char show_pax = 0;
58 static char show_stack = 0;
59 static char show_textrel = 0;
60 static char show_rpath = 0;
61 static char show_needed = 0;
62 static char show_interp = 0;
63 static char show_banner = 1;
64 static char be_quiet = 0;
65 static char be_verbose = 0;
66 static char *find_sym = NULL, *versioned_symname = NULL;
67 static char *out_format = NULL;
68
69
70
71 /* sub-funcs for scanelf_file() */
72 static 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 }
83 static 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 }
108 static 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 }
133 static 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 }
181 static 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 }
219 static 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 }
242 static 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 }
287 /* scan an elf file and show all the fun stuff */
288 static 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 }
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 ");
352 }
353 if (!found_file) printf(" FILE");
354 printf("\n");
355 show_banner = 0;
356 }
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) {
392 if (!be_quiet || found_pax || found_stack || found_textrel || \
393 found_rpath || found_needed || found_sym)
394 puts(filename);
395 } else {
396 printf("\n");
397 }
398
399 unreadelf(elf);
400 }
401
402 /* scan a directory for ET_EXEC files and print when we find one */
403 static void scanelf_dir(const char *path)
404 {
405 register DIR *dir;
406 register struct dirent *dentry;
407 struct stat st_top, st;
408 char buf[_POSIX_PATH_MAX];
409 size_t pathlen = 0, len = 0;
410
411 /* make sure path exists */
412 if (lstat(path, &st_top) == -1) {
413 if (be_verbose > 2) printf("%s: does not exist\n", path);
414 return;
415 }
416
417 /* ok, if it isn't a directory, assume we can open it */
418 if (!S_ISDIR(st_top.st_mode)) {
419 scanelf_file(path);
420 return;
421 }
422
423 /* now scan the dir looking for fun stuff */
424 if ((dir = opendir(path)) == NULL) {
425 warnf("could not opendir %s: %s", path, strerror(errno));
426 return;
427 }
428 if (be_verbose) printf("%s: scanning dir\n", path);
429
430 pathlen = strlen(path);
431 while ((dentry = readdir(dir))) {
432 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
433 continue;
434 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
435 if (len >= sizeof(buf)) {
436 warnf("Skipping '%s': len > sizeof(buf); %d > %d\n", path, (int)len, (int)sizeof(buf));
437 continue;
438 }
439 sprintf(buf, "%s/%s", path, dentry->d_name);
440 if (lstat(buf, &st) != -1) {
441 if (S_ISREG(st.st_mode))
442 scanelf_file(buf);
443 else if (dir_recurse && S_ISDIR(st.st_mode)) {
444 if (dir_crossmount || (st_top.st_dev == st.st_dev))
445 scanelf_dir(buf);
446 }
447 }
448 }
449 closedir(dir);
450 }
451
452 /* scan /etc/ld.so.conf for paths */
453 static void scanelf_ldpath()
454 {
455 char scan_l, scan_ul, scan_ull;
456 char *path, *p;
457 FILE *fp;
458
459 if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
460 err("Unable to open ld.so.conf: %s", strerror(errno));
461
462 scan_l = scan_ul = scan_ull = 0;
463
464 if ((path = malloc(_POSIX_PATH_MAX)) == NULL) {
465 warn("Can not malloc() memory for ldpath scanning");
466 return;
467 }
468 while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL)
469 if (*path == '/') {
470 if ((p = strrchr(path, '\r')) != NULL)
471 *p = 0;
472 if ((p = strrchr(path, '\n')) != NULL)
473 *p = 0;
474 if (!scan_l && !strcmp(path, "/lib")) scan_l = 1;
475 if (!scan_ul && !strcmp(path, "/usr/lib")) scan_ul = 1;
476 if (!scan_ull && !strcmp(path, "/usr/local/lib")) scan_ull = 1;
477 scanelf_dir(path);
478 }
479 free(path);
480 fclose(fp);
481
482 if (!scan_l) scanelf_dir("/lib");
483 if (!scan_ul) scanelf_dir("/usr/lib");
484 if (!scan_ull) scanelf_dir("/usr/local/lib");
485 }
486
487 /* scan env PATH for paths */
488 static void scanelf_envpath()
489 {
490 char *path, *p;
491
492 path = getenv("PATH");
493 if (!path)
494 err("PATH is not set in your env !");
495
496 if ((path = strdup(path)) == NULL)
497 err("strdup failed: %s", strerror(errno));
498
499 while ((p = strrchr(path, ':')) != NULL) {
500 scanelf_dir(p + 1);
501 *p = 0;
502 }
503
504 free(path);
505 }
506
507
508
509 /* usage / invocation handling functions */
510 #define PARSE_FLAGS "plRmyxetrnis:aqvF:o:BhV"
511 #define a_argument required_argument
512 static struct option const long_opts[] = {
513 {"path", no_argument, NULL, 'p'},
514 {"ldpath", no_argument, NULL, 'l'},
515 {"recursive", no_argument, NULL, 'R'},
516 {"mount", no_argument, NULL, 'm'},
517 {"symlink", no_argument, NULL, 'y'},
518 {"pax", no_argument, NULL, 'x'},
519 {"header", no_argument, NULL, 'e'},
520 {"textrel", no_argument, NULL, 't'},
521 {"rpath", no_argument, NULL, 'r'},
522 {"needed", no_argument, NULL, 'n'},
523 {"interp", no_argument, NULL, 'i'},
524 {"symbol", a_argument, NULL, 's'},
525 {"all", no_argument, NULL, 'a'},
526 {"quiet", no_argument, NULL, 'q'},
527 {"verbose", no_argument, NULL, 'v'},
528 {"format", a_argument, NULL, 'F'},
529 {"file", a_argument, NULL, 'o'},
530 {"nobanner", no_argument, NULL, 'B'},
531 {"help", no_argument, NULL, 'h'},
532 {"version", no_argument, NULL, 'V'},
533 {NULL, no_argument, NULL, 0x0}
534 };
535 static char *opts_help[] = {
536 "Scan all directories in PATH environment",
537 "Scan all directories in /etc/ld.so.conf",
538 "Scan directories recursively",
539 "Don't recursively cross mount points",
540 "Don't scan symlinks\n",
541 "Print PaX markings",
542 "Print GNU_STACK markings",
543 "Print TEXTREL information",
544 "Print RPATH information",
545 "Print NEEDED information",
546 "Print INTERP information",
547 "Find a specified symbol",
548 "Print all scanned info (-x -e -t -r)\n",
549 "Only output 'bad' things",
550 "Be verbose (can be specified more than once)",
551 "Use specified format for output",
552 "Write output stream to a filename",
553 "Don't display the header",
554 "Print this help and exit",
555 "Print version and exit",
556 NULL
557 };
558
559 /* display usage and exit */
560 static void usage(int status)
561 {
562 int i;
563 printf(" Scan ELF binaries for stuff\n\n"
564 "Usage: %s [options] <dir1/file1> [dir2 dirN fileN ...]\n\n", argv0);
565 printf("Options: -[%s]\n", PARSE_FLAGS);
566 for (i = 0; long_opts[i].name; ++i)
567 if (long_opts[i].has_arg == no_argument)
568 printf(" -%c, --%-13s %s\n", long_opts[i].val,
569 long_opts[i].name, opts_help[i]);
570 else
571 printf(" -%c, --%-6s <arg> %s\n", long_opts[i].val,
572 long_opts[i].name, opts_help[i]);
573 exit(status);
574 }
575
576 /* parse command line arguments and preform needed actions */
577 static void parseargs(int argc, char *argv[])
578 {
579 int flag;
580
581 opterr = 0;
582 while ((flag=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
583 switch (flag) {
584
585 case 'V':
586 printf("%s compiled %s\n%s\n"
587 "%s written for Gentoo Linux by <solar and vapier @ gentoo.org>\n",
588 __FILE__, __DATE__, rcsid, argv0);
589 exit(EXIT_SUCCESS);
590 break;
591 case 'h': usage(EXIT_SUCCESS); break;
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;
630 case 'B': show_banner = 0; break;
631 case 'l': scan_ldpath = 1; break;
632 case 'p': scan_envpath = 1; break;
633 case 'R': dir_recurse = 1; break;
634 case 'm': dir_crossmount = 0; break;
635 case 'x': show_pax = 1; break;
636 case 'e': show_stack = 1; break;
637 case 't': show_textrel = 1; break;
638 case 'r': show_rpath = 1; break;
639 case 'n': show_needed = 1; break;
640 case 'i': show_interp = 1; break;
641 case 'q': be_quiet = 1; break;
642 case 'v': be_verbose = (be_verbose % 20) + 1; break;
643 case 'a': show_pax = show_stack = show_textrel = show_rpath = show_needed = show_interp = 1; break;
644
645 case ':':
646 warn("Option missing parameter\n");
647 usage(EXIT_FAILURE);
648 break;
649 case '?':
650 warn("Unknown option\n");
651 usage(EXIT_FAILURE);
652 break;
653 default:
654 err("Unhandled option '%c'", flag);
655 break;
656 }
657 }
658
659 if (be_quiet && be_verbose)
660 err("You can be quiet or you can be verbose, not both, stupid");
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 */
686 if (scan_ldpath) scanelf_ldpath();
687 if (scan_envpath) scanelf_envpath();
688 if (optind == argc && !scan_ldpath && !scan_envpath)
689 err("Nothing to scan !?");
690 while (optind < argc)
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);
699 }
700
701
702
703 int main(int argc, char *argv[])
704 {
705 if (argc < 2)
706 usage(EXIT_FAILURE);
707 parseargs(argc, argv);
708 fclose(stdout);
709 return EXIT_SUCCESS;
710 }

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