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Commit | Line | Data |
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528c1f1c | 1 | /* Stub for ldd script to print Linux libc4 dependencies. |
2b778ceb | 2 | Copyright (C) 1998-2021 Free Software Foundation, Inc. |
528c1f1c UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
528c1f1c UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
528c1f1c | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
528c1f1c UD |
19 | |
20 | /* This code is based on the `ldd' program code from the Linux ld.so | |
21 | package. */ | |
22 | ||
23 | #include <a.out.h> | |
24 | #include <errno.h> | |
e2102c14 | 25 | #include <error.h> |
528c1f1c UD |
26 | #include <libintl.h> |
27 | #include <locale.h> | |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <unistd.h> | |
32 | ||
33 | /* Get libc version number. */ | |
34 | #include "../version.h" | |
35 | ||
36 | #define PACKAGE _libc_intl_domainname | |
37 | ||
38 | ||
39 | int | |
40 | main (int argc, char *argv[]) | |
41 | { | |
42 | const char *filename; | |
43 | size_t filename_len; | |
44 | struct exec exec; | |
45 | char *buf; | |
46 | FILE *fp; | |
47 | ||
48 | /* Set locale via LC_ALL. */ | |
49 | setlocale (LC_ALL, ""); | |
50 | ||
51 | /* Set the text message domain. */ | |
52 | textdomain (PACKAGE); | |
53 | ||
54 | /* We expect exactly one argument. */ | |
55 | if (argc != 2) | |
56 | return 1; | |
57 | ||
cbbcaf23 UD |
58 | if (strcmp (argv[1], "--help") == 0) |
59 | { | |
60 | printf (gettext ("Usage: lddlibc4 FILE\n\n")); | |
8b748aed JM |
61 | printf (gettext ("For bug reporting instructions, please see:\n\ |
62 | %s.\n"), REPORT_BUGS_TO); | |
cbbcaf23 UD |
63 | return 0; |
64 | } | |
65 | else if (strcmp (argv[1], "--version") == 0) | |
66 | { | |
8b748aed | 67 | printf ("lddlibc4 %s%s\n", PKGVERSION, VERSION); |
cbbcaf23 UD |
68 | printf (gettext ("\ |
69 | Copyright (C) %s Free Software Foundation, Inc.\n\ | |
70 | This is free software; see the source for copying conditions. There is NO\n\ | |
71 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
5f72f980 | 72 | "), "2020"); |
cbbcaf23 UD |
73 | return 0; |
74 | } | |
75 | ||
528c1f1c UD |
76 | filename = argv[1]; |
77 | ||
78 | /* First see whether this is really an a.out binary. */ | |
79 | fp = fopen (filename, "rb"); | |
80 | if (fp == NULL) | |
81 | error (2, errno, gettext ("cannot open `%s'"), filename); | |
82 | ||
83 | /* Read the program header. */ | |
84 | if (fread (&exec, sizeof exec, 1, fp) < 1) | |
85 | error (2, errno, gettext ("cannot read header from `%s'"), filename); | |
86 | ||
87 | /* Test for the magic numbers. */ | |
88 | if (N_MAGIC (exec) != ZMAGIC && N_MAGIC (exec) != QMAGIC | |
89 | && N_MAGIC (exec) != OMAGIC) | |
90 | exit (3); | |
91 | ||
92 | /* We don't need the file open anymore. */ | |
93 | fclose (fp); | |
94 | ||
e2e9ee17 | 95 | /* We must put `__LDD_ARGV0=<program-name>' in the environment. */ |
528c1f1c UD |
96 | filename_len = strlen (filename); |
97 | buf = (char *) alloca (sizeof "__LDD_ARGV0=" + filename_len); | |
98 | mempcpy (mempcpy (buf, "__LDD_ARGV0=", sizeof "__LDD_ARGV0=" - 1), | |
e2e9ee17 | 99 | filename, filename_len + 1); |
528c1f1c UD |
100 | /* ...and put the value in the environment. */ |
101 | putenv (buf); | |
102 | ||
103 | /* Now we can execute the binary. */ | |
3dead500 | 104 | return execv (filename, &argv[argc]) ? 4 : 0; |
528c1f1c | 105 | } |