/[gentoo-projects]/pax-utils/scanelf.c
Gentoo

Contents of /pax-utils/scanelf.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.113 - (hide annotations) (download) (as text)
Tue Jan 24 00:31:58 2006 UTC (8 years, 6 months ago) by vapier
Branch: MAIN
Changes since 1.112: +5 -5 lines
File MIME type: text/x-csrc
make the error messages of invalid options useful

1 solar 1.1 /*
2 vapier 1.98 * Copyright 2003-2006 Gentoo Foundation
3 solar 1.1 * Distributed under the terms of the GNU General Public License v2
4 vapier 1.113 * $Header: /var/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.112 2006/01/24 00:30:36 vapier Exp $
5 solar 1.1 *
6 vapier 1.98 * Copyright 2003-2006 Ned Ludd - <solar@gentoo.org>
7     * Copyright 2004-2006 Mike Frysinger - <vapier@gentoo.org>
8 solar 1.1 */
9    
10 vapier 1.89 #include "paxinc.h"
11 solar 1.1
12 vapier 1.113 static const char *rcsid = "$Id: scanelf.c,v 1.112 2006/01/24 00:30:36 vapier Exp $";
13 vapier 1.36 #define argv0 "scanelf"
14 vapier 1.10
15 vapier 1.70 #define IS_MODIFIER(c) (c == '%' || c == '#')
16    
17 vapier 1.10
18    
19     /* prototypes */
20 vapier 1.106 static int scanelf_elfobj(elfobj *elf);
21     static int scanelf_elf(const char *filename, int fd, size_t len);
22     static int scanelf_archive(const char *filename, int fd, size_t len);
23 vapier 1.10 static void scanelf_file(const char *filename);
24     static void scanelf_dir(const char *path);
25 vapier 1.106 static void scanelf_ldpath(void);
26     static void scanelf_envpath(void);
27 vapier 1.10 static void usage(int status);
28     static void parseargs(int argc, char *argv[]);
29 vapier 1.60 static char *xstrdup(const char *s);
30 vapier 1.41 static void *xmalloc(size_t size);
31 vapier 1.95 static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n);
32     #define xstrcat(dst,src,curr_len) xstrncat(dst,src,curr_len,0)
33 vapier 1.41 static inline void xchrcat(char **dst, const char append, size_t *curr_len);
34 vapier 1.10
35     /* variables to control behavior */
36 vapier 1.48 static char *ldpaths[256];
37 vapier 1.10 static char scan_ldpath = 0;
38     static char scan_envpath = 0;
39 vapier 1.37 static char scan_symlink = 1;
40 vapier 1.105 static char scan_archives = 0;
41 vapier 1.10 static char dir_recurse = 0;
42 vapier 1.14 static char dir_crossmount = 1;
43 vapier 1.10 static char show_pax = 0;
44 solar 1.73 static char show_phdr = 0;
45 vapier 1.10 static char show_textrel = 0;
46     static char show_rpath = 0;
47 vapier 1.32 static char show_needed = 0;
48 vapier 1.38 static char show_interp = 0;
49 vapier 1.49 static char show_bind = 0;
50 vapier 1.84 static char show_soname = 0;
51 vapier 1.76 static char show_textrels = 0;
52 solar 1.16 static char show_banner = 1;
53 vapier 1.10 static char be_quiet = 0;
54 vapier 1.14 static char be_verbose = 0;
55 vapier 1.70 static char be_wewy_wewy_quiet = 0;
56 vapier 1.39 static char *find_sym = NULL, *versioned_symname = NULL;
57 vapier 1.72 static char *find_lib = NULL;
58 vapier 1.39 static char *out_format = NULL;
59 vapier 1.66 static char *search_path = NULL;
60 vapier 1.101 static char fix_elf = 0;
61 solar 1.86 static char gmatch = 0;
62 vapier 1.102 static char use_ldcache = 0;
63 solar 1.1
64 vapier 1.70
65 solar 1.96 caddr_t ldcache = 0;
66     size_t ldcache_size = 0;
67    
68 vapier 1.39 /* sub-funcs for scanelf_file() */
69 vapier 1.77 static void scanelf_file_get_symtabs(elfobj *elf, void **sym, void **tab)
70     {
71     /* find the best SHT_DYNSYM and SHT_STRTAB sections */
72     #define GET_SYMTABS(B) \
73     if (elf->elf_class == ELFCLASS ## B) { \
74     Elf ## B ## _Shdr *symtab, *strtab, *dynsym, *dynstr; \
75     /* debug sections */ \
76     symtab = SHDR ## B (elf_findsecbyname(elf, ".symtab")); \
77     strtab = SHDR ## B (elf_findsecbyname(elf, ".strtab")); \
78     /* runtime sections */ \
79     dynsym = SHDR ## B (elf_findsecbyname(elf, ".dynsym")); \
80     dynstr = SHDR ## B (elf_findsecbyname(elf, ".dynstr")); \
81     if (symtab && dynsym) { \
82     *sym = (void*)((EGET(symtab->sh_size) > EGET(dynsym->sh_size)) ? symtab : dynsym); \
83     } else { \
84     *sym = (void*)(symtab ? symtab : dynsym); \
85     } \
86     if (strtab && dynstr) { \
87     *tab = (void*)((EGET(strtab->sh_size) > EGET(dynstr->sh_size)) ? strtab : dynstr); \
88     } else { \
89     *tab = (void*)(strtab ? strtab : dynstr); \
90     } \
91     }
92     GET_SYMTABS(32)
93     GET_SYMTABS(64)
94     }
95 vapier 1.41 static char *scanelf_file_pax(elfobj *elf, char *found_pax)
96 solar 1.6 {
97 solar 1.61 static char ret[7];
98     unsigned long i, shown;
99    
100 vapier 1.41 if (!show_pax) return NULL;
101 vapier 1.10
102 solar 1.61 shown = 0;
103     memset(&ret, 0, sizeof(ret));
104    
105     if (elf->phdr) {
106     #define SHOW_PAX(B) \
107     if (elf->elf_class == ELFCLASS ## B) { \
108     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
109     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
110     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
111     if (EGET(phdr[i].p_type) != PT_PAX_FLAGS) \
112     continue; \
113     if (be_quiet && (EGET(phdr[i].p_flags) == 10240)) \
114     continue; \
115     memcpy(ret, pax_short_pf_flags(EGET(phdr[i].p_flags)), 6); \
116     *found_pax = 1; \
117     ++shown; \
118     break; \
119     } \
120     }
121     SHOW_PAX(32)
122     SHOW_PAX(64)
123     }
124    
125     /* fall back to EI_PAX if no PT_PAX was found */
126     if (!*ret) {
127 vapier 1.90 static char *paxflags;
128 solar 1.61 paxflags = pax_short_hf_flags(EI_PAX_FLAGS(elf));
129     if (!be_quiet || (be_quiet && EI_PAX_FLAGS(elf))) {
130     *found_pax = 1;
131 vapier 1.90 return (be_wewy_wewy_quiet ? NULL : paxflags);
132 solar 1.61 }
133     strncpy(ret, paxflags, sizeof(ret));
134 vapier 1.14 }
135 vapier 1.41
136 vapier 1.90 if (be_wewy_wewy_quiet || (be_quiet && !shown))
137 solar 1.61 return NULL;
138 vapier 1.90 else
139     return ret;
140     }
141 solar 1.61
142 solar 1.73 static char *scanelf_file_phdr(elfobj *elf, char *found_phdr, char *found_relro, char *found_load)
143 vapier 1.39 {
144 vapier 1.71 static char ret[12];
145 vapier 1.41 char *found;
146 vapier 1.99 unsigned long i, shown, multi_stack, multi_relro, multi_load;
147     int max_pt_load;
148 vapier 1.41
149 solar 1.73 if (!show_phdr) return NULL;
150 vapier 1.41
151 vapier 1.71 memcpy(ret, "--- --- ---\0", 12);
152    
153 vapier 1.41 shown = 0;
154 vapier 1.71 multi_stack = multi_relro = multi_load = 0;
155 vapier 1.99 max_pt_load = elf_max_pt_load(elf);
156 vapier 1.44
157 vapier 1.108 #define NOTE_GNU_STACK ".note.GNU-stack"
158 solar 1.73 #define SHOW_PHDR(B) \
159 vapier 1.39 if (elf->elf_class == ELFCLASS ## B) { \
160     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
161 vapier 1.91 Elf ## B ## _Off offset; \
162     uint32_t flags, check_flags; \
163     if (elf->phdr != NULL) { \
164     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
165     for (i = 0; i < EGET(ehdr->e_phnum); ++i) { \
166     if (EGET(phdr[i].p_type) == PT_GNU_STACK) { \
167     if (multi_stack++) warnf("%s: multiple PT_GNU_STACK's !?", elf->filename); \
168     found = found_phdr; \
169     offset = 0; \
170     check_flags = PF_X; \
171     } else if (EGET(phdr[i].p_type) == PT_GNU_RELRO) { \
172     if (multi_relro++) warnf("%s: multiple PT_GNU_RELRO's !?", elf->filename); \
173     found = found_relro; \
174     offset = 4; \
175     check_flags = PF_X; \
176     } else if (EGET(phdr[i].p_type) == PT_LOAD) { \
177 vapier 1.99 if (multi_load++ > max_pt_load) warnf("%s: more than %i PT_LOAD's !?", elf->filename, max_pt_load); \
178 vapier 1.91 found = found_load; \
179     offset = 8; \
180     check_flags = PF_W|PF_X; \
181     } else \
182     continue; \
183     flags = EGET(phdr[i].p_flags); \
184     if (be_quiet && ((flags & check_flags) != check_flags)) \
185     continue; \
186 vapier 1.101 if (fix_elf && ((flags & PF_X) != flags)) { \
187     ESET(phdr[i].p_flags, flags & (PF_X ^ (size_t)-1)); \
188     ret[3] = ret[7] = '!'; \
189     flags = EGET(phdr[i].p_flags); \
190     } \
191 vapier 1.91 memcpy(ret+offset, gnu_short_stack_flags(flags), 3); \
192     *found = 1; \
193     ++shown; \
194     } \
195     } else if (elf->shdr != NULL) { \
196     /* no program headers which means this is prob an object file */ \
197     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
198     Elf ## B ## _Shdr *strtbl = shdr + EGET(ehdr->e_shstrndx); \
199 vapier 1.108 char *str; \
200     if ((void*)strtbl > (void*)(elf->data + sizeof(*strtbl))) \
201     goto skip_this_shdr##B; \
202 vapier 1.91 check_flags = SHF_WRITE|SHF_EXECINSTR; \
203     for (i = 0; i < EGET(ehdr->e_shnum); ++i) { \
204     if (EGET(shdr[i].sh_type) != SHT_PROGBITS) continue; \
205     offset = EGET(strtbl->sh_offset) + EGET(shdr[i].sh_name); \
206 vapier 1.108 str = elf->data + offset; \
207     if (str > elf->data + offset + sizeof(NOTE_GNU_STACK)) continue; \
208     if (!strcmp(str, NOTE_GNU_STACK)) { \
209 vapier 1.91 if (multi_stack++) warnf("%s: multiple .note.GNU-stack's !?", elf->filename); \
210     flags = EGET(shdr[i].sh_flags); \
211     if (be_quiet && ((flags & check_flags) != check_flags)) \
212     continue; \
213     ++*found_phdr; \
214     shown = 1; \
215     if (flags & SHF_WRITE) ret[0] = 'W'; \
216     if (flags & SHF_ALLOC) ret[1] = 'A'; \
217     if (flags & SHF_EXECINSTR) ret[2] = 'X'; \
218     if (flags & 0xFFFFFFF8) warn("Invalid section flags for GNU-stack"); \
219     break; \
220     } \
221     } \
222 vapier 1.108 skip_this_shdr##B: \
223 vapier 1.91 if (!multi_stack) { \
224     *found_phdr = 1; \
225     shown = 1; \
226     memcpy(ret, "!WX", 3); \
227     } \
228 vapier 1.39 } \
229     }
230 solar 1.73 SHOW_PHDR(32)
231     SHOW_PHDR(64)
232 vapier 1.44
233 vapier 1.90 if (be_wewy_wewy_quiet || (be_quiet && !shown))
234 vapier 1.41 return NULL;
235     else
236     return ret;
237 vapier 1.39 }
238 vapier 1.90 static const char *scanelf_file_textrel(elfobj *elf, char *found_textrel)
239 vapier 1.39 {
240 vapier 1.90 static const char *ret = "TEXTREL";
241 vapier 1.44 unsigned long i;
242 vapier 1.41
243 vapier 1.79 if (!show_textrel && !show_textrels) return NULL;
244 vapier 1.41
245 vapier 1.44 if (elf->phdr) {
246 vapier 1.39 #define SHOW_TEXTREL(B) \
247     if (elf->elf_class == ELFCLASS ## B) { \
248     Elf ## B ## _Dyn *dyn; \
249     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
250     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
251 vapier 1.44 Elf ## B ## _Off offset; \
252 vapier 1.39 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
253 vapier 1.59 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
254 vapier 1.44 offset = EGET(phdr[i].p_offset); \
255     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
256     dyn = DYN ## B (elf->data + offset); \
257 vapier 1.39 while (EGET(dyn->d_tag) != DT_NULL) { \
258     if (EGET(dyn->d_tag) == DT_TEXTREL) { /*dyn->d_tag != DT_FLAGS)*/ \
259     *found_textrel = 1; \
260     /*if (dyn->d_un.d_val & DF_TEXTREL)*/ \
261 vapier 1.70 return (be_wewy_wewy_quiet ? NULL : ret); \
262 vapier 1.39 } \
263     ++dyn; \
264 vapier 1.26 } \
265 vapier 1.39 } }
266     SHOW_TEXTREL(32)
267     SHOW_TEXTREL(64)
268 vapier 1.44 }
269    
270 vapier 1.70 if (be_quiet || be_wewy_wewy_quiet)
271 vapier 1.41 return NULL;
272     else
273 vapier 1.90 return " - ";
274 vapier 1.39 }
275 vapier 1.79 static char *scanelf_file_textrels(elfobj *elf, char *found_textrels, char *found_textrel)
276 vapier 1.76 {
277 vapier 1.82 unsigned long s, r, rmax;
278     void *symtab_void, *strtab_void, *text_void;
279 vapier 1.76
280     if (!show_textrels) return NULL;
281    
282 vapier 1.79 /* don't search for TEXTREL's if the ELF doesn't have any */
283     if (!*found_textrel) scanelf_file_textrel(elf, found_textrel);
284     if (!*found_textrel) return NULL;
285    
286 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
287 vapier 1.82 text_void = elf_findsecbyname(elf, ".text");
288 vapier 1.76
289 vapier 1.82 if (symtab_void && strtab_void && text_void && elf->shdr) {
290 vapier 1.76 #define SHOW_TEXTRELS(B) \
291     if (elf->elf_class == ELFCLASS ## B) { \
292     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
293     Elf ## B ## _Shdr *shdr = SHDR ## B (elf->shdr); \
294     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
295     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
296 vapier 1.82 Elf ## B ## _Shdr *text = SHDR ## B (text_void); \
297     Elf ## B ## _Addr vaddr = EGET(text->sh_addr); \
298     uint ## B ## _t memsz = EGET(text->sh_size); \
299 vapier 1.76 Elf ## B ## _Rel *rel; \
300     Elf ## B ## _Rela *rela; \
301     /* search the section headers for relocations */ \
302     for (s = 0; s < EGET(ehdr->e_shnum); ++s) { \
303     uint32_t sh_type = EGET(shdr[s].sh_type); \
304     if (sh_type == SHT_REL) { \
305     rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
306     rela = NULL; \
307     rmax = EGET(shdr[s].sh_size) / sizeof(*rel); \
308     } else if (sh_type == SHT_RELA) { \
309     rel = NULL; \
310     rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
311     rmax = EGET(shdr[s].sh_size) / sizeof(*rela); \
312     } else \
313     continue; \
314 vapier 1.82 /* now see if any of the relocs are in the .text */ \
315     for (r = 0; r < rmax; ++r) { \
316     unsigned long sym_max; \
317     Elf ## B ## _Addr offset_tmp; \
318     Elf ## B ## _Sym *func; \
319     Elf ## B ## _Sym *sym; \
320     Elf ## B ## _Addr r_offset; \
321     uint ## B ## _t r_info; \
322     if (sh_type == SHT_REL) { \
323     r_offset = EGET(rel[r].r_offset); \
324     r_info = EGET(rel[r].r_info); \
325     } else { \
326     r_offset = EGET(rela[r].r_offset); \
327     r_info = EGET(rela[r].r_info); \
328     } \
329     /* make sure this relocation is inside of the .text */ \
330     if (r_offset < vaddr || r_offset >= vaddr + memsz) { \
331     if (be_verbose <= 2) continue; \
332     } else \
333 vapier 1.78 *found_textrels = 1; \
334 vapier 1.82 /* locate this relocation symbol name */ \
335     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
336 vapier 1.112 if ((void*)sym > (void*)elf->data_end) { \
337 vapier 1.111 warn("%s: corrupt ELF symbol", elf->filename); \
338 vapier 1.109 continue; \
339     } \
340 vapier 1.82 sym_max = ELF ## B ## _R_SYM(r_info); \
341     if (sym_max * EGET(symtab->sh_entsize) < symtab->sh_size) \
342     sym += sym_max; \
343     else \
344     sym = NULL; \
345     sym_max = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
346     /* show the raw details about this reloc */ \
347 vapier 1.88 printf(" %s: ", elf->base_filename); \
348 vapier 1.82 if (sym && sym->st_name) \
349     printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name))); \
350     else \
351 vapier 1.88 printf("(memory/fake?)"); \
352 vapier 1.82 printf(" [0x%lX]", (unsigned long)r_offset); \
353     /* now try to find the closest symbol that this rel is probably in */ \
354     sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
355     func = NULL; \
356     offset_tmp = 0; \
357     while (sym_max--) { \
358     if (EGET(sym->st_value) < r_offset && EGET(sym->st_value) > offset_tmp) { \
359     func = sym; \
360     offset_tmp = EGET(sym->st_value); \
361 vapier 1.76 } \
362 vapier 1.82 ++sym; \
363 vapier 1.76 } \
364 vapier 1.82 printf(" in "); \
365     if (func && func->st_name) \
366     printf("%s", (char*)(elf->data + EGET(strtab->sh_offset) + EGET(func->st_name))); \
367     else \
368     printf("(NULL: fake?)"); \
369     printf(" [0x%lX]\n", (unsigned long)offset_tmp); \
370 vapier 1.76 } \
371     } }
372     SHOW_TEXTRELS(32)
373     SHOW_TEXTRELS(64)
374     }
375 vapier 1.82 if (!*found_textrels)
376     warnf("ELF %s has TEXTREL markings but doesnt appear to have any real TEXTREL's !?", elf->filename);
377 vapier 1.76
378     return NULL;
379     }
380 solar 1.83
381 vapier 1.102 static void rpath_security_checks(elfobj *, char *, const char *);
382     static void rpath_security_checks(elfobj *elf, char *item, const char *dt_type)
383 vapier 1.100 {
384 solar 1.83 struct stat st;
385 vapier 1.84 switch (*item) {
386 vapier 1.89 case '/': break;
387     case '.':
388 vapier 1.102 warnf("Security problem with relative %s '%s' in %s", dt_type, item, elf->filename);
389 vapier 1.89 break;
390 vapier 1.100 case ':':
391 vapier 1.89 case '\0':
392 vapier 1.102 warnf("Security problem NULL %s in %s", dt_type, elf->filename);
393 solar 1.83 break;
394     case '$':
395 vapier 1.84 if (fstat(elf->fd, &st) != -1)
396 solar 1.83 if ((st.st_mode & S_ISUID) || (st.st_mode & S_ISGID))
397 vapier 1.102 warnf("Security problem with %s='%s' in %s with mode set of %o",
398     dt_type, item, elf->filename, st.st_mode & 07777);
399 solar 1.83 break;
400     default:
401 vapier 1.102 warnf("Maybe? sec problem with %s='%s' in %s", dt_type, item, elf->filename);
402 solar 1.83 break;
403     }
404     }
405 vapier 1.41 static void scanelf_file_rpath(elfobj *elf, char *found_rpath, char **ret, size_t *ret_len)
406 vapier 1.39 {
407 vapier 1.48 unsigned long i, s;
408     char *rpath, *runpath, **r;
409 vapier 1.39 void *strtbl_void;
410 vapier 1.10
411 vapier 1.39 if (!show_rpath) return;
412 vapier 1.10
413 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
414     rpath = runpath = NULL;
415 vapier 1.10
416 vapier 1.44 if (elf->phdr && strtbl_void) {
417 vapier 1.26 #define SHOW_RPATH(B) \
418     if (elf->elf_class == ELFCLASS ## B) { \
419     Elf ## B ## _Dyn *dyn; \
420     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
421     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
422     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
423 vapier 1.44 Elf ## B ## _Off offset; \
424 vapier 1.60 Elf ## B ## _Xword word; \
425 vapier 1.48 /* Scan all the program headers */ \
426 vapier 1.26 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
427 vapier 1.48 /* Just scan dynamic headers */ \
428 vapier 1.26 if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
429 vapier 1.44 offset = EGET(phdr[i].p_offset); \
430     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
431 vapier 1.48 /* Just scan dynamic RPATH/RUNPATH headers */ \
432 vapier 1.44 dyn = DYN ## B (elf->data + offset); \
433 vapier 1.48 while ((word=EGET(dyn->d_tag)) != DT_NULL) { \
434     if (word == DT_RPATH) { \
435     r = &rpath; \
436     } else if (word == DT_RUNPATH) { \
437     r = &runpath; \
438     } else { \
439     ++dyn; \
440     continue; \
441     } \
442     /* Verify the memory is somewhat sane */ \
443     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
444 vapier 1.69 if (offset < (Elf ## B ## _Off)elf->len) { \
445 vapier 1.48 if (*r) warn("ELF has multiple %s's !?", get_elfdtype(word)); \
446     *r = (char*)(elf->data + offset); \
447 vapier 1.103 /* cache the length in case we need to nuke this section later on */ \
448     if (fix_elf) \
449     offset = strlen(*r); \
450 vapier 1.48 /* If quiet, don't output paths in ld.so.conf */ \
451 vapier 1.69 if (be_quiet) { \
452     size_t len; \
453     char *start, *end; \
454 vapier 1.75 /* note that we only 'chop' off leading known paths. */ \
455     /* since *r is read-only memory, we can only move the ptr forward. */ \
456     start = *r; \
457     /* scan each path in : delimited list */ \
458     while (start) { \
459 vapier 1.102 rpath_security_checks(elf, start, get_elfdtype(word)); \
460 vapier 1.69 end = strchr(start, ':'); \
461 vapier 1.75 len = (end ? abs(end - start) : strlen(start)); \
462 vapier 1.102 if (use_ldcache) \
463     for (s = 0; ldpaths[s]; ++s) \
464     if (!strncmp(ldpaths[s], start, len) && !ldpaths[s][len]) { \
465     *r = end; \
466     /* corner case ... if RPATH reads "/usr/lib:", we want \
467     * to show ':' rather than '' */ \
468     if (end && end[1] != '\0') \
469     (*r)++; \
470     break; \
471     } \
472 vapier 1.100 if (!*r || !end) \
473     break; \
474 vapier 1.75 else \
475     start = start + len + 1; \
476 vapier 1.69 } \
477     } \
478 vapier 1.101 if (*r) { \
479 solar 1.107 if (fix_elf > 2 || (fix_elf && **r == '\0')) { \
480 vapier 1.101 /* just nuke it */ \
481     nuke_it##B: \
482 vapier 1.103 memset(*r, 0x00, offset); \
483 vapier 1.102 *r = NULL; \
484 vapier 1.101 ESET(dyn->d_tag, DT_DEBUG); \
485 vapier 1.103 ESET(dyn->d_un.d_ptr, 0); \
486 vapier 1.101 } else if (fix_elf) { \
487     /* try to clean "bad" paths */ \
488     size_t len, tmpdir_len; \
489     char *start, *end; \
490     const char *tmpdir; \
491     start = *r; \
492     tmpdir = (getenv("TMPDIR") ? : "."); \
493     tmpdir_len = strlen(tmpdir); \
494     while (1) { \
495     end = strchr(start, ':'); \
496     if (start == end) { \
497     eat_this_path##B: \
498     len = strlen(end); \
499     memmove(start, end+1, len); \
500     start[len-1] = '\0'; \
501     end = start - 1; \
502     } else if (tmpdir && !strncmp(start, tmpdir, tmpdir_len)) { \
503     if (!end) { \
504     if (start == *r) \
505     goto nuke_it##B; \
506     *--start = '\0'; \
507     } else \
508     goto eat_this_path##B; \
509     } \
510     if (!end) \
511     break; \
512     start = end + 1; \
513     } \
514 vapier 1.102 if (**r == '\0') \
515     goto nuke_it##B; \
516 vapier 1.101 } \
517 vapier 1.102 if (*r) \
518     *found_rpath = 1; \
519 vapier 1.101 } \
520 vapier 1.26 } \
521     ++dyn; \
522     } \
523     } }
524     SHOW_RPATH(32)
525     SHOW_RPATH(64)
526 vapier 1.10 }
527 vapier 1.41
528 vapier 1.70 if (be_wewy_wewy_quiet) return;
529    
530 vapier 1.39 if (rpath && runpath) {
531 vapier 1.41 if (!strcmp(rpath, runpath)) {
532     xstrcat(ret, runpath, ret_len);
533     } else {
534 vapier 1.39 fprintf(stderr, "RPATH [%s] != RUNPATH [%s]\n", rpath, runpath);
535 vapier 1.41 xchrcat(ret, '{', ret_len);
536     xstrcat(ret, rpath, ret_len);
537     xchrcat(ret, ',', ret_len);
538     xstrcat(ret, runpath, ret_len);
539     xchrcat(ret, '}', ret_len);
540 vapier 1.39 }
541     } else if (rpath || runpath)
542 vapier 1.41 xstrcat(ret, (runpath ? runpath : rpath), ret_len);
543     else if (!be_quiet)
544     xstrcat(ret, " - ", ret_len);
545 vapier 1.39 }
546 solar 1.96
547     #define LDSO_CACHE_MAGIC "ld.so-"
548     #define LDSO_CACHE_MAGIC_LEN (sizeof LDSO_CACHE_MAGIC -1)
549     #define LDSO_CACHE_VER "1.7.0"
550     #define LDSO_CACHE_VER_LEN (sizeof LDSO_CACHE_VER -1)
551 vapier 1.97 #define FLAG_ANY -1
552     #define FLAG_TYPE_MASK 0x00ff
553     #define FLAG_LIBC4 0x0000
554     #define FLAG_ELF 0x0001
555     #define FLAG_ELF_LIBC5 0x0002
556     #define FLAG_ELF_LIBC6 0x0003
557     #define FLAG_REQUIRED_MASK 0xff00
558     #define FLAG_SPARC_LIB64 0x0100
559     #define FLAG_IA64_LIB64 0x0200
560     #define FLAG_X8664_LIB64 0x0300
561     #define FLAG_S390_LIB64 0x0400
562     #define FLAG_POWERPC_LIB64 0x0500
563     #define FLAG_MIPS64_LIBN32 0x0600
564     #define FLAG_MIPS64_LIBN64 0x0700
565 solar 1.96
566 vapier 1.97 static char *lookup_cache_lib(elfobj *, char *);
567     static char *lookup_cache_lib(elfobj *elf, char *fname)
568 solar 1.96 {
569     int fd = 0;
570     char *strs;
571 vapier 1.104 static char buf[__PAX_UTILS_PATH_MAX] = "";
572 solar 1.96 const char *cachefile = "/etc/ld.so.cache";
573     struct stat st;
574    
575     typedef struct {
576     char magic[LDSO_CACHE_MAGIC_LEN];
577     char version[LDSO_CACHE_VER_LEN];
578     int nlibs;
579     } header_t;
580 vapier 1.97 header_t *header;
581 solar 1.96
582     typedef struct {
583     int flags;
584     int sooffset;
585     int liboffset;
586     } libentry_t;
587     libentry_t *libent;
588    
589     if (fname == NULL)
590     return NULL;
591    
592     if (ldcache == 0) {
593 vapier 1.97 if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY)) == -1)
594 solar 1.96 return NULL;
595 vapier 1.97
596     /* cache these values so we only map/unmap the cache file once */
597 solar 1.96 ldcache_size = st.st_size;
598 vapier 1.97 ldcache = mmap(0, ldcache_size, PROT_READ, MAP_SHARED, fd, 0);
599    
600     close(fd);
601 solar 1.96
602 vapier 1.97 if (ldcache == (caddr_t)-1)
603 solar 1.96 return NULL;
604    
605     if (memcmp(((header_t *) ldcache)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
606     return NULL;
607     if (memcmp (((header_t *) ldcache)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
608     return NULL;
609     }
610    
611     header = (header_t *) ldcache;
612     libent = (libentry_t *) (ldcache + sizeof(header_t));
613     strs = (char *) &libent[header->nlibs];
614    
615     for (fd = 0; fd < header->nlibs; fd++) {
616 vapier 1.97 /* this should be more fine grained, but for now we assume that
617     * diff arches will not be cached together. and we ignore the
618     * the different multilib mips cases. */
619     if (elf->elf_class == ELFCLASS64 && !(libent[fd].flags & FLAG_REQUIRED_MASK))
620     continue;
621     if (elf->elf_class == ELFCLASS32 && (libent[fd].flags & FLAG_REQUIRED_MASK))
622     continue;
623    
624 solar 1.96 if (strcmp(fname, strs + libent[fd].sooffset) != 0)
625     continue;
626     strncpy(buf, strs + libent[fd].liboffset, sizeof(buf));
627     }
628     return buf;
629     }
630    
631    
632 vapier 1.84 static const char *scanelf_file_needed_lib(elfobj *elf, char *found_needed, char *found_lib, int op, char **ret, size_t *ret_len)
633 vapier 1.39 {
634 vapier 1.44 unsigned long i;
635 vapier 1.39 char *needed;
636     void *strtbl_void;
637 solar 1.96 char *p;
638 vapier 1.39
639 vapier 1.72 if ((op==0 && !show_needed) || (op==1 && !find_lib)) return NULL;
640 vapier 1.10
641 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".dynstr");
642 vapier 1.32
643 vapier 1.44 if (elf->phdr && strtbl_void) {
644 vapier 1.32 #define SHOW_NEEDED(B) \
645     if (elf->elf_class == ELFCLASS ## B) { \
646     Elf ## B ## _Dyn *dyn; \
647     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
648     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
649     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
650 vapier 1.44 Elf ## B ## _Off offset; \
651 vapier 1.32 for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
652     if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
653 vapier 1.44 offset = EGET(phdr[i].p_offset); \
654     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
655     dyn = DYN ## B (elf->data + offset); \
656 vapier 1.32 while (EGET(dyn->d_tag) != DT_NULL) { \
657     if (EGET(dyn->d_tag) == DT_NEEDED) { \
658 vapier 1.44 offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
659 vapier 1.69 if (offset >= (Elf ## B ## _Off)elf->len) { \
660 vapier 1.49 ++dyn; \
661     continue; \
662     } \
663 vapier 1.44 needed = (char*)(elf->data + offset); \
664 vapier 1.72 if (op == 0) { \
665     if (!be_wewy_wewy_quiet) { \
666     if (*found_needed) xchrcat(ret, ',', ret_len); \
667 vapier 1.102 if (use_ldcache) \
668 vapier 1.97 if ((p = lookup_cache_lib(elf, needed)) != NULL) \
669 solar 1.96 needed = p; \
670 vapier 1.72 xstrcat(ret, needed, ret_len); \
671     } \
672     *found_needed = 1; \
673     } else { \
674 solar 1.86 if (!strncmp(find_lib, needed, strlen( !gmatch ? needed : find_lib))) { \
675 vapier 1.81 *found_lib = 1; \
676 solar 1.86 return (be_wewy_wewy_quiet ? NULL : needed); \
677 vapier 1.81 } \
678 vapier 1.72 } \
679 vapier 1.32 } \
680     ++dyn; \
681     } \
682     } }
683     SHOW_NEEDED(32)
684     SHOW_NEEDED(64)
685 vapier 1.85 if (op == 0 && !*found_needed && be_verbose)
686 vapier 1.84 warn("ELF lacks DT_NEEDED sections: %s", elf->filename);
687 vapier 1.32 }
688 vapier 1.72
689     return NULL;
690 vapier 1.39 }
691 vapier 1.41 static char *scanelf_file_interp(elfobj *elf, char *found_interp)
692 vapier 1.39 {
693     void *strtbl_void;
694    
695 vapier 1.41 if (!show_interp) return NULL;
696 vapier 1.32
697 vapier 1.39 strtbl_void = elf_findsecbyname(elf, ".interp");
698 vapier 1.38
699 vapier 1.39 if (strtbl_void) {
700 vapier 1.38 #define SHOW_INTERP(B) \
701     if (elf->elf_class == ELFCLASS ## B) { \
702 solar 1.40 Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
703     *found_interp = 1; \
704 vapier 1.70 return (be_wewy_wewy_quiet ? NULL : elf->data + EGET(strtbl->sh_offset)); \
705 vapier 1.38 }
706     SHOW_INTERP(32)
707     SHOW_INTERP(64)
708     }
709 vapier 1.41 return NULL;
710 vapier 1.39 }
711 vapier 1.49 static char *scanelf_file_bind(elfobj *elf, char *found_bind)
712     {
713     unsigned long i;
714     struct stat s;
715    
716     if (!show_bind) return NULL;
717 vapier 1.51 if (!elf->phdr) return NULL;
718 vapier 1.49
719     #define SHOW_BIND(B) \
720     if (elf->elf_class == ELFCLASS ## B) { \
721     Elf ## B ## _Dyn *dyn; \
722     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
723     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
724     Elf ## B ## _Off offset; \
725     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
726     if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
727     offset = EGET(phdr[i].p_offset); \
728     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
729     dyn = DYN ## B (elf->data + offset); \
730     while (EGET(dyn->d_tag) != DT_NULL) { \
731     if (EGET(dyn->d_tag) == DT_BIND_NOW || \
732     (EGET(dyn->d_tag) == DT_FLAGS && EGET(dyn->d_un.d_val) & DF_BIND_NOW)) \
733     { \
734     if (be_quiet) return NULL; \
735     *found_bind = 1; \
736 vapier 1.70 return (char *)(be_wewy_wewy_quiet ? NULL : "NOW"); \
737 vapier 1.49 } \
738     ++dyn; \
739     } \
740     } \
741     }
742     SHOW_BIND(32)
743     SHOW_BIND(64)
744    
745 vapier 1.70 if (be_wewy_wewy_quiet) return NULL;
746    
747 vapier 1.56 if (be_quiet && !fstat(elf->fd, &s) && !(s.st_mode & S_ISUID || s.st_mode & S_ISGID)) {
748 vapier 1.49 return NULL;
749     } else {
750     *found_bind = 1;
751 solar 1.68 return (char *) "LAZY";
752 vapier 1.49 }
753     }
754 vapier 1.84 static char *scanelf_file_soname(elfobj *elf, char *found_soname)
755     {
756     unsigned long i;
757     char *soname;
758     void *strtbl_void;
759    
760     if (!show_soname) return NULL;
761    
762     strtbl_void = elf_findsecbyname(elf, ".dynstr");
763    
764     if (elf->phdr && strtbl_void) {
765     #define SHOW_SONAME(B) \
766     if (elf->elf_class == ELFCLASS ## B) { \
767     Elf ## B ## _Dyn *dyn; \
768     Elf ## B ## _Ehdr *ehdr = EHDR ## B (elf->ehdr); \
769     Elf ## B ## _Phdr *phdr = PHDR ## B (elf->phdr); \
770     Elf ## B ## _Shdr *strtbl = SHDR ## B (strtbl_void); \
771     Elf ## B ## _Off offset; \
772     /* only look for soname in shared objects */ \
773     if (ehdr->e_type != ET_DYN) \
774     return NULL; \
775     for (i = 0; i < EGET(ehdr->e_phnum); i++) { \
776     if (EGET(phdr[i].p_type) != PT_DYNAMIC) continue; \
777     offset = EGET(phdr[i].p_offset); \
778     if (offset >= elf->len - sizeof(Elf ## B ## _Dyn)) continue; \
779     dyn = DYN ## B (elf->data + offset); \
780     while (EGET(dyn->d_tag) != DT_NULL) { \
781     if (EGET(dyn->d_tag) == DT_SONAME) { \
782     offset = EGET(strtbl->sh_offset) + EGET(dyn->d_un.d_ptr); \
783     if (offset >= (Elf ## B ## _Off)elf->len) { \
784     ++dyn; \
785     continue; \
786     } \
787     soname = (char*)(elf->data + offset); \
788     *found_soname = 1; \
789     return (be_wewy_wewy_quiet ? NULL : soname); \
790     } \
791     ++dyn; \
792     } \
793     } }
794     SHOW_SONAME(32)
795     SHOW_SONAME(64)
796     }
797    
798     return NULL;
799     }
800 vapier 1.72 static char *scanelf_file_sym(elfobj *elf, char *found_sym)
801 vapier 1.39 {
802 vapier 1.44 unsigned long i;
803 vapier 1.95 char *ret;
804 vapier 1.39 void *symtab_void, *strtab_void;
805 vapier 1.38
806 vapier 1.41 if (!find_sym) return NULL;
807 vapier 1.95 ret = find_sym;
808 vapier 1.32
809 vapier 1.77 scanelf_file_get_symtabs(elf, &symtab_void, &strtab_void);
810 vapier 1.27
811 vapier 1.39 if (symtab_void && strtab_void) {
812 vapier 1.27 #define FIND_SYM(B) \
813     if (elf->elf_class == ELFCLASS ## B) { \
814     Elf ## B ## _Shdr *symtab = SHDR ## B (symtab_void); \
815     Elf ## B ## _Shdr *strtab = SHDR ## B (strtab_void); \
816     Elf ## B ## _Sym *sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \
817 vapier 1.44 unsigned long cnt = EGET(symtab->sh_size) / EGET(symtab->sh_entsize); \
818 vapier 1.27 char *symname; \
819     for (i = 0; i < cnt; ++i) { \
820     if (sym->st_name) { \
821     symname = (char *)(elf->data + EGET(strtab->sh_offset) + EGET(sym->st_name)); \
822 vapier 1.111 if ((void*)symname > (void*)elf->data) { \
823     warn("%s: corrupt ELF symbols", elf->filename); \
824     continue; \
825     } \
826 solar 1.28 if (*find_sym == '*') { \
827 vapier 1.32 printf("%s(%s) %5lX %15s %s\n", \
828 vapier 1.39 ((*found_sym == 0) ? "\n\t" : "\t"), \
829 vapier 1.76 elf->base_filename, \
830 vapier 1.94 (unsigned long)sym->st_size, \
831 vapier 1.95 get_elfstttype(sym->st_info), \
832 vapier 1.32 symname); \
833 vapier 1.39 *found_sym = 1; \
834 vapier 1.95 } else { \
835     char *this_sym, *next_sym; \
836     this_sym = find_sym; \
837     do { \
838     next_sym = strchr(this_sym, ','); \
839     if (next_sym == NULL) \
840     next_sym = this_sym + strlen(this_sym); \
841     if ((strncmp(this_sym, symname, (next_sym-this_sym)) == 0 && symname[next_sym-this_sym] == '\0') || \
842     (strcmp(symname, versioned_symname) == 0)) { \
843     ret = this_sym; \
844     (*found_sym)++; \
845     goto break_out; \
846     } \
847     this_sym = next_sym + 1; \
848     } while (*next_sym != '\0'); \
849     } \
850 vapier 1.27 } \
851     ++sym; \
852     } }
853     FIND_SYM(32)
854     FIND_SYM(64)
855 vapier 1.39 }
856 vapier 1.70
857 vapier 1.95 break_out:
858 vapier 1.70 if (be_wewy_wewy_quiet) return NULL;
859    
860 vapier 1.41 if (*find_sym != '*' && *found_sym)
861 vapier 1.95 return ret;
862 vapier 1.41 if (be_quiet)
863     return NULL;
864     else
865 solar 1.68 return (char *)" - ";
866 vapier 1.39 }
867     /* scan an elf file and show all the fun stuff */
868 solar 1.57 #define prints(str) write(fileno(stdout), str, strlen(str))
869 vapier 1.106 static int scanelf_elfobj(elfobj *elf)
870 vapier 1.39 {
871 vapier 1.44 unsigned long i;
872 solar 1.73 char found_pax, found_phdr, found_relro, found_load, found_textrel,
873 vapier 1.84 found_rpath, found_needed, found_interp, found_bind, found_soname,
874 vapier 1.76 found_sym, found_lib, found_file, found_textrels;
875 vapier 1.41 static char *out_buffer = NULL;
876     static size_t out_len;
877 vapier 1.39
878 vapier 1.76 found_pax = found_phdr = found_relro = found_load = found_textrel = \
879 vapier 1.84 found_rpath = found_needed = found_interp = found_bind = found_soname = \
880 vapier 1.76 found_sym = found_lib = found_file = found_textrels = 0;
881 vapier 1.39
882     if (be_verbose > 1)
883 vapier 1.106 printf("%s: scanning file {%s,%s}\n", elf->filename,
884 vapier 1.69 get_elfeitype(EI_CLASS, elf->elf_class),
885     get_elfeitype(EI_DATA, elf->data[EI_DATA]));
886 vapier 1.39 else if (be_verbose)
887 vapier 1.106 printf("%s: scanning file\n", elf->filename);
888 vapier 1.39
889 vapier 1.41 /* init output buffer */
890     if (!out_buffer) {
891     out_len = sizeof(char) * 80;
892     out_buffer = (char*)xmalloc(out_len);
893     }
894     *out_buffer = '\0';
895    
896 vapier 1.39 /* show the header */
897     if (!be_quiet && show_banner) {
898 vapier 1.49 for (i = 0; out_format[i]; ++i) {
899 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
900 vapier 1.41
901     switch (out_format[++i]) {
902     case '%': break;
903 vapier 1.70 case '#': break;
904 vapier 1.66 case 'F':
905     case 'p':
906     case 'f': prints("FILE "); found_file = 1; break;
907 vapier 1.41 case 'o': prints(" TYPE "); break;
908     case 'x': prints(" PAX "); break;
909 vapier 1.71 case 'e': prints("STK/REL/PTL "); break;
910 vapier 1.41 case 't': prints("TEXTREL "); break;
911     case 'r': prints("RPATH "); break;
912     case 'n': prints("NEEDED "); break;
913     case 'i': prints("INTERP "); break;
914 vapier 1.49 case 'b': prints("BIND "); break;
915 vapier 1.84 case 'S': prints("SONAME "); break;
916 vapier 1.41 case 's': prints("SYM "); break;
917 vapier 1.72 case 'N': prints("LIB "); break;
918 vapier 1.76 case 'T': prints("TEXTRELS "); break;
919     default: warnf("'%c' has no title ?", out_format[i]);
920 vapier 1.39 }
921 vapier 1.27 }
922 vapier 1.49 if (!found_file) prints("FILE ");
923 vapier 1.41 prints("\n");
924 vapier 1.49 found_file = 0;
925 vapier 1.39 show_banner = 0;
926     }
927    
928     /* dump all the good stuff */
929 vapier 1.49 for (i = 0; out_format[i]; ++i) {
930 vapier 1.41 const char *out;
931 vapier 1.66 const char *tmp;
932 vapier 1.41
933     /* make sure we trim leading spaces in quiet mode */
934     if (be_quiet && *out_buffer == ' ' && !out_buffer[1])
935     *out_buffer = '\0';
936 vapier 1.39
937 vapier 1.70 if (!IS_MODIFIER(out_format[i])) {
938 vapier 1.41 xchrcat(&out_buffer, out_format[i], &out_len);
939     continue;
940     }
941 vapier 1.39
942 vapier 1.41 out = NULL;
943 vapier 1.70 be_wewy_wewy_quiet = (out_format[i] == '#');
944 vapier 1.41 switch (out_format[++i]) {
945 vapier 1.70 case '%':
946     case '#':
947     xchrcat(&out_buffer, out_format[i], &out_len); break;
948     case 'F':
949 vapier 1.76 found_file = 1;
950 vapier 1.70 if (be_wewy_wewy_quiet) break;
951 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
952 vapier 1.70 break;
953 vapier 1.66 case 'p':
954 vapier 1.76 found_file = 1;
955 vapier 1.70 if (be_wewy_wewy_quiet) break;
956 vapier 1.106 tmp = elf->filename;
957 vapier 1.66 if (search_path) {
958     ssize_t len_search = strlen(search_path);
959 vapier 1.106 ssize_t len_file = strlen(elf->filename);
960     if (!strncmp(elf->filename, search_path, len_search) && \
961 vapier 1.66 len_file > len_search)
962     tmp += len_search;
963     if (*tmp == '/' && search_path[len_search-1] == '/') tmp++;
964     }
965     xstrcat(&out_buffer, tmp, &out_len);
966     break;
967     case 'f':
968 vapier 1.76 found_file = 1;
969 vapier 1.70 if (be_wewy_wewy_quiet) break;
970 vapier 1.106 tmp = strrchr(elf->filename, '/');
971     tmp = (tmp == NULL ? elf->filename : tmp+1);
972 vapier 1.66 xstrcat(&out_buffer, tmp, &out_len);
973     break;
974 vapier 1.41 case 'o': out = get_elfetype(elf); break;
975     case 'x': out = scanelf_file_pax(elf, &found_pax); break;
976 solar 1.73 case 'e': out = scanelf_file_phdr(elf, &found_phdr, &found_relro, &found_load); break;
977 vapier 1.41 case 't': out = scanelf_file_textrel(elf, &found_textrel); break;
978 vapier 1.79 case 'T': out = scanelf_file_textrels(elf, &found_textrels, &found_textrel); break;
979 vapier 1.41 case 'r': scanelf_file_rpath(elf, &found_rpath, &out_buffer, &out_len); break;
980 vapier 1.72 case 'n':
981     case 'N': out = scanelf_file_needed_lib(elf, &found_needed, &found_lib, (out_format[i]=='N'), &out_buffer, &out_len); break;
982 vapier 1.41 case 'i': out = scanelf_file_interp(elf, &found_interp); break;
983 vapier 1.49 case 'b': out = scanelf_file_bind(elf, &found_bind); break;
984 vapier 1.84 case 'S': out = scanelf_file_soname(elf, &found_soname); break;
985 vapier 1.72 case 's': out = scanelf_file_sym(elf, &found_sym); break;
986 vapier 1.76 default: warnf("'%c' has no scan code?", out_format[i]);
987 vapier 1.29 }
988 vapier 1.95 if (out) {
989     /* hack for comma delimited output like `scanelf -s sym1,sym2,sym3` */
990     if (out_format[i] == 's' && (tmp=strchr(out,',')) != NULL)
991     xstrncat(&out_buffer, out, &out_len, (tmp-out));
992     else
993     xstrcat(&out_buffer, out, &out_len);
994     }
995 vapier 1.39 }
996    
997 vapier 1.54 #define FOUND_SOMETHING() \
998 solar 1.73 (found_pax || found_phdr || found_relro || found_load || found_textrel || \
999 vapier 1.76 found_rpath || found_needed || found_interp || found_bind || \
1000 vapier 1.84 found_soname || found_sym || found_lib || found_textrels)
1001 vapier 1.54
1002     if (!found_file && (!be_quiet || (be_quiet && FOUND_SOMETHING()))) {
1003     xchrcat(&out_buffer, ' ', &out_len);
1004 vapier 1.106 xstrcat(&out_buffer, elf->filename, &out_len);
1005 vapier 1.27 }
1006 vapier 1.79 if (!be_quiet || (be_quiet && FOUND_SOMETHING())) {
1007 vapier 1.41 puts(out_buffer);
1008 vapier 1.79 fflush(stdout);
1009     }
1010 vapier 1.10
1011 vapier 1.105 return 0;
1012     }
1013    
1014 vapier 1.106 /* scan a single elf */
1015     static int scanelf_elf(const char *filename, int fd, size_t len)
1016     {
1017     int ret;
1018     elfobj *elf;
1019    
1020     /* verify this is real ELF */
1021     if ((elf = _readelf_fd(filename, fd, len, !fix_elf)) == NULL) {
1022     if (be_verbose > 2) printf("%s: not an ELF\n", filename);
1023     return 1;
1024     }
1025    
1026     ret = scanelf_elfobj(elf);
1027     unreadelf(elf);
1028     return ret;
1029     }
1030 vapier 1.105 /* scan an archive of elfs */
1031 vapier 1.106 static int scanelf_archive(const char *filename, int fd, size_t len)
1032 vapier 1.105 {
1033 vapier 1.106 archive_handle *ar;
1034 vapier 1.105 archive_member *m;
1035 vapier 1.106 char *ar_buffer;
1036     elfobj *elf;
1037    
1038     ar = ar_open_fd(filename, fd);
1039     if (ar == NULL)
1040     return 1;
1041    
1042     ar_buffer = (char*)mmap(0, len, PROT_READ | (fix_elf ? PROT_WRITE : 0), (fix_elf ? MAP_SHARED : MAP_PRIVATE), fd, 0);
1043     while ((m=ar_next(ar)) != NULL) {
1044     elf = readelf_buffer(m->name, ar_buffer+lseek(fd,0,SEEK_CUR), m->size);
1045     if (elf) {
1046     scanelf_elfobj(elf);
1047     unreadelf(elf);
1048     }
1049     }
1050     munmap(ar_buffer, len);
1051    
1052 vapier 1.105 return 0;
1053     }
1054     /* scan a file which may be an elf or an archive or some other magical beast */
1055     static void scanelf_file(const char *filename)
1056     {
1057     struct stat st;
1058 vapier 1.106 int fd;
1059 vapier 1.105
1060     /* make sure 'filename' exists */
1061     if (lstat(filename, &st) == -1) {
1062     if (be_verbose > 2) printf("%s: does not exist\n", filename);
1063     return;
1064     }
1065    
1066     /* always handle regular files and handle symlinked files if no -y */
1067     if (S_ISLNK(st.st_mode)) {
1068     if (!scan_symlink) return;
1069     stat(filename, &st);
1070     }
1071     if (!S_ISREG(st.st_mode)) {
1072     if (be_verbose > 2) printf("%s: skipping non-file\n", filename);
1073     return;
1074     }
1075    
1076 vapier 1.106 if ((fd=open(filename, (fix_elf ? O_RDWR : O_RDONLY))) == -1)
1077     return;
1078    
1079     if (scanelf_elf(filename, fd, st.st_size) == 1 && scan_archives)
1080 vapier 1.105 /* if it isn't an ELF, maybe it's an .a archive */
1081 vapier 1.106 scanelf_archive(filename, fd, st.st_size);
1082    
1083     close(fd);
1084 solar 1.6 }
1085    
1086 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
1087 vapier 1.10 static void scanelf_dir(const char *path)
1088 solar 1.1 {
1089 vapier 1.10 register DIR *dir;
1090     register struct dirent *dentry;
1091 vapier 1.14 struct stat st_top, st;
1092 vapier 1.104 char buf[__PAX_UTILS_PATH_MAX];
1093 vapier 1.32 size_t pathlen = 0, len = 0;
1094 vapier 1.10
1095     /* make sure path exists */
1096 vapier 1.39 if (lstat(path, &st_top) == -1) {
1097     if (be_verbose > 2) printf("%s: does not exist\n", path);
1098 vapier 1.10 return;
1099 vapier 1.39 }
1100 solar 1.11
1101 vapier 1.10 /* ok, if it isn't a directory, assume we can open it */
1102 vapier 1.14 if (!S_ISDIR(st_top.st_mode)) {
1103 vapier 1.10 scanelf_file(path);
1104     return;
1105     }
1106    
1107     /* now scan the dir looking for fun stuff */
1108     if ((dir = opendir(path)) == NULL) {
1109     warnf("could not opendir %s: %s", path, strerror(errno));
1110     return;
1111     }
1112 vapier 1.15 if (be_verbose) printf("%s: scanning dir\n", path);
1113 solar 1.11
1114 vapier 1.32 pathlen = strlen(path);
1115 vapier 1.10 while ((dentry = readdir(dir))) {
1116     if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
1117     continue;
1118 vapier 1.32 len = (pathlen + 1 + strlen(dentry->d_name) + 1);
1119     if (len >= sizeof(buf)) {
1120 vapier 1.76 warnf("Skipping '%s': len > sizeof(buf); %lu > %lu\n", path,
1121     (unsigned long)len, (unsigned long)sizeof(buf));
1122 vapier 1.32 continue;
1123     }
1124 solar 1.31 sprintf(buf, "%s/%s", path, dentry->d_name);
1125 solar 1.20 if (lstat(buf, &st) != -1) {
1126 vapier 1.10 if (S_ISREG(st.st_mode))
1127 solar 1.20 scanelf_file(buf);
1128 vapier 1.10 else if (dir_recurse && S_ISDIR(st.st_mode)) {
1129 vapier 1.14 if (dir_crossmount || (st_top.st_dev == st.st_dev))
1130 solar 1.20 scanelf_dir(buf);
1131 vapier 1.10 }
1132     }
1133     }
1134     closedir(dir);
1135 solar 1.1 }
1136    
1137 vapier 1.47 static int scanelf_from_file(char *filename)
1138     {
1139 solar 1.45 FILE *fp = NULL;
1140     char *p;
1141 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1142 solar 1.45
1143     if (((strcmp(filename, "-")) == 0) && (ttyname(0) == NULL))
1144     fp = stdin;
1145     else if ((fp = fopen(filename, "r")) == NULL)
1146     return 1;
1147    
1148 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1149 solar 1.45 if ((p = strchr(path, '\n')) != NULL)
1150     *p = 0;
1151 vapier 1.66 search_path = path;
1152 solar 1.45 scanelf_dir(path);
1153     }
1154     if (fp != stdin)
1155     fclose(fp);
1156     return 0;
1157     }
1158    
1159 vapier 1.48 static void load_ld_so_conf()
1160     {
1161     FILE *fp = NULL;
1162     char *p;
1163 vapier 1.104 char path[__PAX_UTILS_PATH_MAX];
1164 vapier 1.48 int i = 0;
1165    
1166     if ((fp = fopen("/etc/ld.so.conf", "r")) == NULL)
1167     return;
1168    
1169 vapier 1.104 while ((fgets(path, __PAX_UTILS_PATH_MAX, fp)) != NULL) {
1170 vapier 1.48 if (*path != '/')
1171     continue;
1172    
1173     if ((p = strrchr(path, '\r')) != NULL)
1174     *p = 0;
1175     if ((p = strchr(path, '\n')) != NULL)
1176     *p = 0;
1177    
1178     ldpaths[i++] = xstrdup(path);
1179    
1180     if (i + 1 == sizeof(ldpaths) / sizeof(*ldpaths))
1181     break;
1182     }
1183     ldpaths[i] = NULL;
1184    
1185     fclose(fp);
1186     }
1187    
1188 vapier 1.10 /* scan /etc/ld.so.conf for paths */
1189     static void scanelf_ldpath()
1190     {
1191 vapier 1.17 char scan_l, scan_ul, scan_ull;
1192 vapier 1.48 int i = 0;
1193 vapier 1.10
1194 vapier 1.48 if (!ldpaths[0])
1195     err("Unable to load any paths from ld.so.conf");
1196 vapier 1.10
1197 vapier 1.17 scan_l = scan_ul = scan_ull = 0;
1198    
1199 vapier 1.48 while (ldpaths[i]) {
1200     if (!scan_l && !strcmp(ldpaths[i], "/lib")) scan_l = 1;
1201     if (!scan_ul && !strcmp(ldpaths[i], "/usr/lib")) scan_ul = 1;
1202     if (!scan_ull && !strcmp(ldpaths[i], "/usr/local/lib")) scan_ull = 1;
1203     scanelf_dir(ldpaths[i]);
1204     ++i;
1205     }
1206 vapier 1.10
1207 vapier 1.17 if (!scan_l) scanelf_dir("/lib");
1208     if (!scan_ul) scanelf_dir("/usr/lib");
1209     if (!scan_ull) scanelf_dir("/usr/local/lib");
1210 vapier 1.10 }
1211 solar 1.1
1212 vapier 1.10 /* scan env PATH for paths */
1213     static void scanelf_envpath()
1214 solar 1.1 {
1215 solar 1.34 char *path, *p;
1216 vapier 1.10
1217     path = getenv("PATH");
1218     if (!path)
1219     err("PATH is not set in your env !");
1220 vapier 1.41 path = xstrdup(path);
1221 vapier 1.10
1222     while ((p = strrchr(path, ':')) != NULL) {
1223     scanelf_dir(p + 1);
1224     *p = 0;
1225     }
1226 vapier 1.17
1227 solar 1.34 free(path);
1228 solar 1.1 }
1229    
1230    
1231 vapier 1.10 /* usage / invocation handling functions */
1232 vapier 1.105 #define PARSE_FLAGS "plRmyAXxetrnLibSs:gN:TaqvF:f:o:BhV"
1233 vapier 1.27 #define a_argument required_argument
1234 vapier 1.10 static struct option const long_opts[] = {
1235     {"path", no_argument, NULL, 'p'},
1236     {"ldpath", no_argument, NULL, 'l'},
1237     {"recursive", no_argument, NULL, 'R'},
1238 vapier 1.14 {"mount", no_argument, NULL, 'm'},
1239 vapier 1.37 {"symlink", no_argument, NULL, 'y'},
1240 vapier 1.105 {"archives", no_argument, NULL, 'A'},
1241     {"ldcache", no_argument, NULL, 'L'},
1242 vapier 1.101 {"fix", no_argument, NULL, 'X'},
1243 vapier 1.10 {"pax", no_argument, NULL, 'x'},
1244 solar 1.16 {"header", no_argument, NULL, 'e'},
1245 vapier 1.10 {"textrel", no_argument, NULL, 't'},
1246     {"rpath", no_argument, NULL, 'r'},
1247 vapier 1.32 {"needed", no_argument, NULL, 'n'},
1248 vapier 1.38 {"interp", no_argument, NULL, 'i'},
1249 vapier 1.49 {"bind", no_argument, NULL, 'b'},
1250 vapier 1.84 {"soname", no_argument, NULL, 'S'},
1251 vapier 1.76 {"symbol", a_argument, NULL, 's'},
1252     {"lib", a_argument, NULL, 'N'},
1253 solar 1.86 {"gmatch", no_argument, NULL, 'g'},
1254 vapier 1.76 {"textrels", no_argument, NULL, 'T'},
1255 vapier 1.10 {"all", no_argument, NULL, 'a'},
1256     {"quiet", no_argument, NULL, 'q'},
1257 vapier 1.14 {"verbose", no_argument, NULL, 'v'},
1258 vapier 1.76 {"format", a_argument, NULL, 'F'},
1259     {"from", a_argument, NULL, 'f'},
1260     {"file", a_argument, NULL, 'o'},
1261 solar 1.16 {"nobanner", no_argument, NULL, 'B'},
1262 vapier 1.10 {"help", no_argument, NULL, 'h'},
1263     {"version", no_argument, NULL, 'V'},
1264     {NULL, no_argument, NULL, 0x0}
1265     };
1266 solar 1.57
1267 solar 1.68 static const char *opts_help[] = {
1268 vapier 1.10 "Scan all directories in PATH environment",
1269     "Scan all directories in /etc/ld.so.conf",
1270 vapier 1.14 "Scan directories recursively",
1271 vapier 1.37 "Don't recursively cross mount points",
1272 vapier 1.101 "Don't scan symlinks",
1273 vapier 1.105 "Scan archives (.a files)",
1274     "Utilize ld.so.cache information (use with -r/-n)",
1275 vapier 1.101 "Try and 'fix' bad things (use with -r/-e)\n",
1276 vapier 1.10 "Print PaX markings",
1277 vapier 1.71 "Print GNU_STACK/PT_LOAD markings",
1278 vapier 1.10 "Print TEXTREL information",
1279     "Print RPATH information",
1280 vapier 1.32 "Print NEEDED information",
1281 vapier 1.38 "Print INTERP information",
1282 vapier 1.49 "Print BIND information",
1283 vapier 1.84 "Print SONAME information",
1284 vapier 1.27 "Find a specified symbol",
1285 vapier 1.72 "Find a specified library",
1286 solar 1.86 "Use strncmp to match libraries. (use with -N)",
1287 vapier 1.76 "Locate cause of TEXTREL",
1288 vapier 1.82 "Print all scanned info (-x -e -t -r -b)\n",
1289 vapier 1.14 "Only output 'bad' things",
1290     "Be verbose (can be specified more than once)",
1291 vapier 1.39 "Use specified format for output",
1292 solar 1.45 "Read input stream from a filename",
1293 vapier 1.24 "Write output stream to a filename",
1294 vapier 1.14 "Don't display the header",
1295 vapier 1.10 "Print this help and exit",
1296     "Print version and exit",
1297     NULL
1298     };
1299    
1300     /* display usage and exit */
1301     static void usage(int status)
1302 solar 1.1 {
1303 vapier 1.44 unsigned long i;
1304 solar 1.52 printf("* Scan ELF binaries for stuff\n\n"
1305 vapier 1.105 "Usage: %s [options] <dir1/file1> [dir2 dirN file2 fileN ...]\n\n", argv0);
1306 solar 1.35 printf("Options: -[%s]\n", PARSE_FLAGS);
1307 vapier 1.10 for (i = 0; long_opts[i].name; ++i)
1308 vapier 1.27 if (long_opts[i].has_arg == no_argument)
1309 solar 1.52 printf(" -%c, --%-13s* %s\n", long_opts[i].val,
1310 vapier 1.27 long_opts[i].name, opts_help[i]);
1311     else
1312 solar 1.52 printf(" -%c, --%-6s <arg> * %s\n", long_opts[i].val,
1313 vapier 1.27 long_opts[i].name, opts_help[i]);
1314 solar 1.45
1315     if (status != EXIT_SUCCESS)
1316     exit(status);
1317    
1318 vapier 1.46 puts("\nThe format modifiers for the -F option are:");
1319 vapier 1.70 puts(" F Filename \tx PaX Flags \te STACK/RELRO");
1320     puts(" t TEXTREL \tr RPATH \tn NEEDED");
1321     puts(" i INTERP \tb BIND \ts symbol");
1322 vapier 1.76 puts(" N library \to Type \tT TEXTRELs");
1323 vapier 1.88 puts(" S SONAME");
1324 vapier 1.70 puts(" p filename (with search path removed)");
1325 vapier 1.88 puts(" f filename (short name/basename)");
1326 vapier 1.70 puts("Prefix each modifier with '%' (verbose) or '#' (silent)");
1327 solar 1.45
1328 vapier 1.10 exit(status);
1329 solar 1.1 }
1330    
1331     /* parse command line arguments and preform needed actions */
1332 vapier 1.10 static void parseargs(int argc, char *argv[])
1333     {
1334 vapier 1.48 int i;
1335 solar 1.45 char *from_file = NULL;
1336 vapier 1.10
1337     opterr = 0;
1338 vapier 1.48 while ((i=getopt_long(argc, argv, PARSE_FLAGS, long_opts, NULL)) != -1) {
1339     switch (i) {
1340 vapier 1.10
1341 vapier 1.39 case 'V':
1342 vapier 1.80 printf("pax-utils-%s: %s compiled %s\n%s\n"
1343     "%s written for Gentoo by <solar and vapier @ gentoo.org>\n",
1344     VERSION, __FILE__, __DATE__, rcsid, argv0);
1345 vapier 1.10 exit(EXIT_SUCCESS);
1346     break;
1347     case 'h': usage(EXIT_SUCCESS); break;
1348 solar 1.45 case 'f':
1349 vapier 1.100 if (from_file) warn("You prob don't want to specify -f twice");
1350     from_file = optarg;
1351 solar 1.45 break;
1352 vapier 1.24 case 'o': {
1353 solar 1.21 FILE *fp = NULL;
1354 solar 1.64 if ((fp = freopen(optarg, "w", stdout)) == NULL)
1355 vapier 1.24 err("Could not open output stream '%s': %s", optarg, strerror(errno));
1356 vapier 1.65 SET_STDOUT(fp);
1357 solar 1.21 break;
1358     }
1359 vapier 1.24
1360 vapier 1.39 case 's': {
1361 vapier 1.93 if (find_sym) warn("You prob don't want to specify -s twice");
1362     find_sym = optarg;
1363     versioned_symname = (char*)xmalloc(sizeof(char) * (strlen(find_sym)+1+1));
1364 vapier 1.39 sprintf(versioned_symname, "%s@", find_sym);
1365     break;
1366     }
1367 vapier 1.72 case 'N': {
1368 vapier 1.93 if (find_lib) warn("You prob don't want to specify -N twice");
1369     find_lib = optarg;
1370 vapier 1.72 break;
1371     }
1372 vapier 1.39
1373     case 'F': {
1374 vapier 1.93 if (out_format) warn("You prob don't want to specify -F twice");
1375     out_format = optarg;
1376 vapier 1.39 break;
1377     }
1378 vapier 1.27
1379 solar 1.96 case 'g': gmatch = 1; /* break; any reason we dont breal; here ? */
1380 vapier 1.102 case 'L': use_ldcache = 1; break;
1381 vapier 1.37 case 'y': scan_symlink = 0; break;
1382 vapier 1.105 case 'A': scan_archives = 1; break;
1383 solar 1.16 case 'B': show_banner = 0; break;
1384 vapier 1.10 case 'l': scan_ldpath = 1; break;
1385     case 'p': scan_envpath = 1; break;
1386     case 'R': dir_recurse = 1; break;
1387 vapier 1.14 case 'm': dir_crossmount = 0; break;
1388 vapier 1.101 case 'X': ++fix_elf; break;
1389 vapier 1.10 case 'x': show_pax = 1; break;
1390 solar 1.73 case 'e': show_phdr = 1; break;
1391 vapier 1.10 case 't': show_textrel = 1; break;
1392     case 'r': show_rpath = 1; break;
1393 vapier 1.32 case 'n': show_needed = 1; break;
1394 vapier 1.38 case 'i': show_interp = 1; break;
1395 vapier 1.49 case 'b': show_bind = 1; break;
1396 vapier 1.84 case 'S': show_soname = 1; break;
1397 vapier 1.76 case 'T': show_textrels = 1; break;
1398 vapier 1.10 case 'q': be_quiet = 1; break;
1399 vapier 1.14 case 'v': be_verbose = (be_verbose % 20) + 1; break;
1400 vapier 1.82 case 'a': show_pax = show_phdr = show_textrel = show_rpath = show_bind = 1; break;
1401 vapier 1.10
1402     case ':':
1403 vapier 1.113 err("Option '%c' is missing parameter", optopt);
1404 vapier 1.10 case '?':
1405 vapier 1.113 err("Unknown option '%c'", optopt);
1406 vapier 1.10 default:
1407 vapier 1.113 err("Unhandled option '%c'; please report this", i);
1408 vapier 1.10 }
1409     }
1410    
1411 vapier 1.39 /* let the format option override all other options */
1412     if (out_format) {
1413 solar 1.73 show_pax = show_phdr = show_textrel = show_rpath = \
1414 vapier 1.84 show_needed = show_interp = show_bind = show_soname = \
1415     show_textrels = 0;
1416 vapier 1.48 for (i = 0; out_format[i]; ++i) {
1417 vapier 1.70 if (!IS_MODIFIER(out_format[i])) continue;
1418 vapier 1.39
1419 vapier 1.48 switch (out_format[++i]) {
1420 vapier 1.39 case '%': break;
1421 vapier 1.70 case '#': break;
1422 vapier 1.39 case 'F': break;
1423 vapier 1.66 case 'p': break;
1424     case 'f': break;
1425 vapier 1.39 case 's': break;
1426 vapier 1.72 case 'N': break;
1427 vapier 1.41 case 'o': break;
1428 vapier 1.39 case 'x': show_pax = 1; break;
1429 solar 1.73 case 'e': show_phdr = 1; break;
1430 vapier 1.39 case 't': show_textrel = 1; break;
1431     case 'r': show_rpath = 1; break;
1432     case 'n': show_needed = 1; break;
1433     case 'i': show_interp = 1; break;
1434 vapier 1.49 case 'b': show_bind = 1; break;
1435 vapier 1.84 case 'S': show_soname = 1; break;
1436 vapier 1.76 case 'T': show_textrels = 1; break;
1437 vapier 1.39 default:
1438     err("Invalid format specifier '%c' (byte %i)",
1439 vapier 1.48 out_format[i], i+1);
1440 vapier 1.39 }
1441     }
1442 vapier 1.41
1443     /* construct our default format */
1444     } else {
1445     size_t fmt_len = 30;
1446     out_format = (char*)xmalloc(sizeof(char) * fmt_len);
1447 vapier 1.76 if (!be_quiet) xstrcat(&out_format, "%o ", &fmt_len);
1448     if (show_pax) xstrcat(&out_format, "%x ", &fmt_len);
1449     if (show_phdr) xstrcat(&out_format, "%e ", &fmt_len);
1450     if (show_textrel) xstrcat(&out_format, "%t ", &fmt_len);
1451     if (show_rpath) xstrcat(&out_format, "%r ", &fmt_len);
1452     if (show_needed) xstrcat(&out_format, "%n ", &fmt_len);
1453     if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
1454     if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
1455 vapier 1.84 if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
1456 vapier 1.76 if (show_textrels) xstrcat(&out_format, "%T ", &fmt_len);
1457     if (find_sym) xstrcat(&out_format, "%s ", &fmt_len);
1458     if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
1459     if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
1460 vapier 1.39 }
1461 vapier 1.41 if (be_verbose > 2) printf("Format: %s\n", out_format);
1462 vapier 1.39
1463     /* now lets actually do the scanning */
1464 vapier 1.102 if (scan_ldpath || use_ldcache)
1465 vapier 1.48 load_ld_so_conf();
1466 vapier 1.10 if (scan_ldpath) scanelf_ldpath();
1467     if (scan_envpath) scanelf_envpath();
1468 solar 1.45 if (from_file) {
1469     scanelf_from_file(from_file);
1470     from_file = *argv;
1471     }
1472     if (optind == argc && !scan_ldpath && !scan_envpath && !from_file)
1473 vapier 1.25 err("Nothing to scan !?");
1474 vapier 1.66 while (optind < argc) {
1475     search_path = argv[optind++];
1476     scanelf_dir(search_path);
1477     }
1478 vapier 1.27
1479 vapier 1.39 /* clean up */
1480 vapier 1.93 if (versioned_symname) free(versioned_symname);
1481 vapier 1.48 for (i = 0; ldpaths[i]; ++i)
1482     free(ldpaths[i]);
1483 solar 1.96
1484     if (ldcache != 0)
1485     munmap(ldcache, ldcache_size);
1486 vapier 1.10 }
1487    
1488    
1489    
1490 vapier 1.41 /* utility funcs */
1491 vapier 1.60 static char *xstrdup(const char *s)
1492 vapier 1.41 {
1493     char *ret = strdup(s);
1494     if (!ret) err("Could not strdup(): %s", strerror(errno));
1495     return ret;
1496     }
1497     static void *xmalloc(size_t size)
1498     {
1499     void *ret = malloc(size);
1500     if (!ret) err("Could not malloc() %li bytes", (unsigned long)size);
1501     return ret;
1502     }
1503 vapier 1.95 static void xstrncat(char **dst, const char *src, size_t *curr_len, size_t n)
1504 vapier 1.41 {
1505 vapier 1.69 size_t new_len;
1506 vapier 1.41
1507     new_len = strlen(*dst) + strlen(src);
1508     if (*curr_len <= new_len) {
1509     *curr_len = new_len + (*curr_len / 2);
1510     *dst = realloc(*dst, *curr_len);
1511     if (!*dst)
1512 vapier 1.95 err("could not realloc() %li bytes", (unsigned long)*curr_len);
1513 vapier 1.41 }
1514    
1515 vapier 1.95 if (n)
1516     strncat(*dst, src, n);
1517     else
1518     strcat(*dst, src);
1519 vapier 1.41 }
1520     static inline void xchrcat(char **dst, const char append, size_t *curr_len)
1521     {
1522     static char my_app[2];
1523     my_app[0] = append;
1524     my_app[1] = '\0';
1525     xstrcat(dst, my_app, curr_len);
1526     }
1527    
1528    
1529 vapier 1.72
1530 vapier 1.10 int main(int argc, char *argv[])
1531 solar 1.1 {
1532 vapier 1.10 if (argc < 2)
1533     usage(EXIT_FAILURE);
1534     parseargs(argc, argv);
1535 solar 1.21 fclose(stdout);
1536 solar 1.61 #ifdef __BOUNDS_CHECKING_ON
1537 vapier 1.66 warn("The calls to add/delete heap should be off by 1 due to the out_buffer not being freed in scanelf_file()");
1538 solar 1.61 #endif
1539 vapier 1.10 return EXIT_SUCCESS;
1540 solar 1.1 }

  ViewVC Help
Powered by ViewVC 1.1.20