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1 /* Copyright (C) 2007 Red Hat, Inc.
2    This file is part of elfutils.
3 
4    This file is free software; you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation; either version 3 of the License, or
7    (at your option) any later version.
8 
9    elfutils is distributed in the hope that it will be useful, but
10    WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
16 
17 #ifdef HAVE_CONFIG_H
18 # include <config.h>
19 #endif
20 
21 #include <ar.h>
22 #include <fcntl.h>
23 #include <libelf.h>
24 #include <stdio.h>
25 #include <unistd.h>
26 
27 
28 static int handle (const char *fname);
29 
30 
31 int
main(int argc,char * argv[])32 main (int argc, char *argv[])
33 {
34   elf_version (EV_CURRENT);
35 
36   int result = 0;
37   if (argc == 1)
38     result = handle ("a.out");
39   else
40     for (int i = 1; i < argc; ++i)
41       result |= handle (argv[1]);
42 
43   return result;
44 }
45 
46 
47 static int
handle(const char * fname)48 handle (const char *fname)
49 {
50   int fd = open (fname, O_RDONLY);
51   if (fd == -1)
52     {
53       printf ("cannot open '%s': %m\n", fname);
54       return 1;
55     }
56 
57   Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
58   if (elf == NULL)
59     {
60       printf ("cannot get ELF handling for '%s': %s\n",
61 	      fname, elf_errmsg (-1));
62       close (fd);
63       return 1;
64     }
65 
66   if (elf_kind (elf) != ELF_K_AR)
67     {
68       printf ("'%s' is no archive\n", fname);
69       elf_end (elf);
70       close (fd);
71       return 1;
72     }
73 
74   printf ("%s:\n", fname);
75   Elf *subelf = NULL;
76   Elf_Cmd cmd = ELF_C_READ_MMAP;
77   while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
78     {
79       Elf_Arhdr *arhdr = elf_getarhdr (subelf);
80       if (arhdr == NULL)
81 	{
82 	  printf ("cannot get archive header in '%s': %s\n",
83 		  fname, elf_errmsg (-1));
84 	  elf_end (subelf);
85 	  elf_end (elf);
86 	  close (fd);
87 	  return 1;
88 	}
89 
90       off_t off = elf_getaroff (subelf);
91 
92       printf ("\nOffset    %llu\n"
93 	      "  Name    %s\n"
94 	      "  Date    %ld\n"
95 	      "  UID     %d\n"
96 	      "  GID     %d\n"
97 	      "  Mode    %o\n"
98 	      "  Size    %lld\n",
99 	      (unsigned long long int) off,
100 	      arhdr->ar_name, (long int) arhdr->ar_date, (int) arhdr->ar_uid,
101 	      (int) arhdr->ar_gid,
102 	      (int) arhdr->ar_mode, (long long int) arhdr->ar_size);
103 
104       cmd = elf_next (subelf);
105       elf_end (subelf);
106     }
107 
108   close (fd);
109 
110   return 0;
111 }
112