105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
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/* Stub for ldd script to print Linux libc4 dependencies.
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Copyright (C) 1998-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This code is based on the `ldd' program code from the Linux ld.so
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package. */
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#include <a.out.h>
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#include <errno.h>
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#include <error.h>
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#include <libintl.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* Get libc version number. */
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#include "../version.h"
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#define PACKAGE _libc_intl_domainname
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int
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main (int argc, char *argv[])
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{
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const char *filename;
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size_t filename_len;
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struct exec exec;
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char *buf;
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FILE *fp;
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/* Set locale via LC_ALL. */
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setlocale (LC_ALL, "");
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/* Set the text message domain. */
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textdomain (PACKAGE);
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/* We expect exactly one argument. */
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if (argc != 2)
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return 1;
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if (strcmp (argv[1], "--help") == 0)
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{
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printf (gettext ("Usage: lddlibc4 FILE\n\n"));
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printf (gettext ("For bug reporting instructions, please see:\n\
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%s.\n"), REPORT_BUGS_TO);
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return 0;
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}
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else if (strcmp (argv[1], "--version") == 0)
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{
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printf ("lddlibc4 %s%s\n", PKGVERSION, VERSION);
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printf (gettext ("\
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Copyright (C) %s Free Software Foundation, Inc.\n\
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This is free software; see the source for copying conditions. There is NO\n\
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
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"), "2022");
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return 0;
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}
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filename = argv[1];
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/* First see whether this is really an a.out binary. */
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fp = fopen (filename, "rb");
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if (fp == NULL)
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error (2, errno, gettext ("cannot open `%s'"), filename);
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/* Read the program header. */
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if (fread (&exec, sizeof exec, 1, fp) < 1)
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error (2, errno, gettext ("cannot read header from `%s'"), filename);
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/* Test for the magic numbers. */
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if (N_MAGIC (exec) != ZMAGIC && N_MAGIC (exec) != QMAGIC
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&& N_MAGIC (exec) != OMAGIC)
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exit (3);
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/* We don't need the file open anymore. */
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fclose (fp);
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/* We must put `__LDD_ARGV0=<program-name>' in the environment. */
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filename_len = strlen (filename);
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buf = (char *) alloca (sizeof "__LDD_ARGV0=" + filename_len);
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mempcpy (mempcpy (buf, "__LDD_ARGV0=", sizeof "__LDD_ARGV0=" - 1),
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filename, filename_len + 1);
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/* ...and put the value in the environment. */
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putenv (buf);
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/* Now we can execute the binary. */
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return execv (filename, &argv[argc]) ? 4 : 0;
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}
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