/* Create, modify, and extract from archives.
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Copyright (C) 2005-2012, 2016, 2017 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2005.
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This file is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <argp.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <gelf.h>
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#include <libintl.h>
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#include <limits.h>
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#include <locale.h>
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#include <search.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdio_ext.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <system.h>
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#include <printversion.h>
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#include "arlib.h"
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/* Name and version of program. */
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ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
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/* Prototypes for local functions. */
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static int do_oper_extract (int oper, const char *arfname, char **argv,
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int argc, long int instance);
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static int do_oper_delete (const char *arfname, char **argv, int argc,
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long int instance);
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static int do_oper_insert (int oper, const char *arfname, char **argv,
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int argc, const char *member);
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/* Bug report address. */
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ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
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|
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/* Definitions of arguments for argp functions. */
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static const struct argp_option options[] =
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{
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{ NULL, 0, NULL, 0, N_("Commands:"), 1 },
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{ NULL, 'd', NULL, 0, N_("Delete files from archive."), 0 },
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{ NULL, 'm', NULL, 0, N_("Move files in archive."), 0 },
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{ NULL, 'p', NULL, 0, N_("Print files in archive."), 0 },
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{ NULL, 'q', NULL, 0, N_("Quick append files to archive."), 0 },
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{ NULL, 'r', NULL, 0,
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N_("Replace existing or insert new file into archive."), 0 },
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{ NULL, 't', NULL, 0, N_("Display content of archive."), 0 },
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{ NULL, 'x', NULL, 0, N_("Extract files from archive."), 0 },
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{ NULL, 0, NULL, 0, N_("Command Modifiers:"), 2 },
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{ NULL, 'o', NULL, 0, N_("Preserve original dates."), 0 },
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{ NULL, 'N', NULL, 0, N_("Use instance [COUNT] of name."), 0 },
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{ NULL, 'C', NULL, 0,
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N_("Do not replace existing files with extracted files."), 0 },
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{ NULL, 'T', NULL, 0, N_("Allow filename to be truncated if necessary."),
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0 },
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{ NULL, 'v', NULL, 0, N_("Provide verbose output."), 0 },
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{ NULL, 's', NULL, 0, N_("Force regeneration of symbol table."), 0 },
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{ NULL, 'a', NULL, 0, N_("Insert file after [MEMBER]."), 0 },
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{ NULL, 'b', NULL, 0, N_("Insert file before [MEMBER]."), 0 },
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{ NULL, 'i', NULL, 0, N_("Same as -b."), 0 },
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{ NULL, 'c', NULL, 0, N_("Suppress message when library has to be created."),
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0 },
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{ NULL, 'P', NULL, 0, N_("Use full path for file matching."), 0 },
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{ NULL, 'u', NULL, 0, N_("Update only older files in archive."), 0 },
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{ NULL, 0, NULL, 0, NULL, 0 }
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};
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/* Short description of program. */
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static const char doc[] = N_("Create, modify, and extract from archives.");
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/* Strings for arguments in help texts. */
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static const char args_doc[] = N_("[MEMBER] [COUNT] ARCHIVE [FILE...]");
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/* Prototype for option handler. */
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static error_t parse_opt (int key, char *arg, struct argp_state *state);
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/* Data structure to communicate with argp functions. */
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static struct argp argp =
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{
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options, parse_opt, args_doc, doc, arlib_argp_children, NULL, NULL
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};
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|
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/* What operation to perform. */
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static enum
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{
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oper_none,
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oper_delete,
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oper_move,
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oper_print,
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oper_qappend,
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oper_replace,
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oper_list,
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oper_extract
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} operation;
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/* Modifiers. */
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static bool verbose;
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static bool preserve_dates;
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static bool instance_specifed;
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static bool dont_replace_existing;
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static bool allow_truncate_fname;
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static bool force_symtab;
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static bool suppress_create_msg;
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static bool full_path;
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static bool update_newer;
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static enum { ipos_none, ipos_before, ipos_after } ipos;
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int
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main (int argc, char *argv[])
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{
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/* We use no threads here which can interfere with handling a stream. */
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(void) __fsetlocking (stdin, FSETLOCKING_BYCALLER);
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(void) __fsetlocking (stdout, FSETLOCKING_BYCALLER);
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(void) __fsetlocking (stderr, FSETLOCKING_BYCALLER);
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/* Set locale. */
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(void) setlocale (LC_ALL, "");
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/* Make sure the message catalog can be found. */
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(void) bindtextdomain (PACKAGE_TARNAME, LOCALEDIR);
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/* Initialize the message catalog. */
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(void) textdomain (PACKAGE_TARNAME);
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/* For historical reasons the options in the first parameter need
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not be preceded by a dash. Add it now if necessary. */
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if (argc > 1 && argv[1][0] != '-')
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{
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size_t len = strlen (argv[1]) + 1;
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char *newp = alloca (len + 1);
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newp[0] = '-';
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memcpy (&newp[1], argv[1], len);
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argv[1] = newp;
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}
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/* Parse and process arguments. */
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int remaining;
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(void) argp_parse (&argp, argc, argv, ARGP_IN_ORDER, &remaining, NULL);
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/* Tell the library which version we are expecting. */
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(void) elf_version (EV_CURRENT);
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/* Handle the [MEMBER] parameter. */
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const char *member = NULL;
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if (ipos != ipos_none)
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{
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/* Only valid for certain operations. */
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if (operation != oper_move && operation != oper_replace)
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error (1, 0, gettext ("\
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'a', 'b', and 'i' are only allowed with the 'm' and 'r' options"));
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if (remaining == argc)
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{
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error (0, 0, gettext ("\
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MEMBER parameter required for 'a', 'b', and 'i' modifiers"));
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argp_help (&argp, stderr, ARGP_HELP_USAGE | ARGP_HELP_SEE,
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program_invocation_short_name);
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exit (EXIT_FAILURE);
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}
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member = argv[remaining++];
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}
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/* Handle the [COUNT] parameter. */
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long int instance = -1;
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if (instance_specifed)
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{
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/* Only valid for certain operations. */
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if (operation != oper_extract && operation != oper_delete)
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error (1, 0, gettext ("\
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'N' is only meaningful with the 'x' and 'd' options"));
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if (remaining == argc)
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{
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error (0, 0, gettext ("COUNT parameter required"));
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argp_help (&argp, stderr, ARGP_HELP_SEE,
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program_invocation_short_name);
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exit (EXIT_FAILURE);
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}
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char *endp;
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errno = 0;
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if (((instance = strtol (argv[remaining], &endp, 10)) == LONG_MAX
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&& errno == ERANGE)
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|| instance <= 0
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|| *endp != '\0')
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error (1, 0, gettext ("invalid COUNT parameter %s"), argv[remaining]);
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++remaining;
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}
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if ((dont_replace_existing || allow_truncate_fname)
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&& unlikely (operation != oper_extract))
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error (1, 0, gettext ("'%c' is only meaningful with the 'x' option"),
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dont_replace_existing ? 'C' : 'T');
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/* There must at least be one more parameter specifying the archive. */
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if (remaining == argc)
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{
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error (0, 0, gettext ("archive name required"));
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argp_help (&argp, stderr, ARGP_HELP_SEE, program_invocation_short_name);
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exit (EXIT_FAILURE);
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}
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const char *arfname = argv[remaining++];
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argv += remaining;
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argc -= remaining;
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int status;
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switch (operation)
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{
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case oper_none:
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error (0, 0, gettext ("command option required"));
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argp_help (&argp, stderr, ARGP_HELP_STD_ERR,
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program_invocation_short_name);
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status = 1;
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break;
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case oper_list:
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case oper_print:
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status = do_oper_extract (operation, arfname, argv, argc, -1);
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break;
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case oper_extract:
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status = do_oper_extract (operation, arfname, argv, argc, instance);
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break;
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case oper_delete:
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status = do_oper_delete (arfname, argv, argc, instance);
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break;
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case oper_move:
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case oper_qappend:
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case oper_replace:
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status = do_oper_insert (operation, arfname, argv, argc, member);
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break;
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default:
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assert (! "should not happen");
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status = 1;
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break;
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}
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return status;
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}
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/* Handle program arguments. */
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static error_t
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parse_opt (int key, char *arg __attribute__ ((unused)),
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struct argp_state *state __attribute__ ((unused)))
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{
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switch (key)
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{
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case 'd':
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case 'm':
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case 'p':
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case 'q':
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case 'r':
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case 't':
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case 'x':
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if (operation != oper_none)
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{
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error (0, 0, gettext ("More than one operation specified"));
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argp_help (&argp, stderr, ARGP_HELP_SEE,
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program_invocation_short_name);
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exit (EXIT_FAILURE);
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}
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switch (key)
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{
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case 'd':
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operation = oper_delete;
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break;
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case 'm':
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operation = oper_move;
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break;
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case 'p':
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operation = oper_print;
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break;
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case 'q':
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operation = oper_qappend;
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break;
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case 'r':
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operation = oper_replace;
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break;
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case 't':
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operation = oper_list;
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break;
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case 'x':
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operation = oper_extract;
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break;
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}
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break;
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case 'a':
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ipos = ipos_after;
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break;
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case 'b':
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case 'i':
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ipos = ipos_before;
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break;
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case 'c':
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suppress_create_msg = true;
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break;
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case 'C':
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dont_replace_existing = true;
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break;
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case 'N':
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instance_specifed = true;
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break;
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case 'o':
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preserve_dates = true;
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break;
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case 'P':
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full_path = true;
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break;
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case 's':
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force_symtab = true;
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break;
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case 'T':
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allow_truncate_fname = true;
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break;
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case 'u':
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update_newer = true;
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break;
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case 'v':
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verbose = true;
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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static int
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open_archive (const char *arfname, int flags, int mode, Elf **elf,
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struct stat *st, bool miss_allowed)
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{
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int fd = open (arfname, flags, mode);
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if (fd == -1)
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{
|
if (miss_allowed)
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return -1;
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error (EXIT_FAILURE, errno, gettext ("cannot open archive '%s'"),
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arfname);
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}
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if (elf != NULL)
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{
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Elf_Cmd cmd = flags == O_RDONLY ? ELF_C_READ_MMAP : ELF_C_RDWR_MMAP;
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*elf = elf_begin (fd, cmd, NULL);
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if (*elf == NULL)
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error (EXIT_FAILURE, 0, gettext ("cannot open archive '%s': %s"),
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arfname, elf_errmsg (-1));
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if (flags == O_RDONLY && elf_kind (*elf) != ELF_K_AR)
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error (EXIT_FAILURE, 0, gettext ("%s: not an archive file"), arfname);
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}
|
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if (st != NULL && fstat (fd, st) != 0)
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error (EXIT_FAILURE, errno, gettext ("cannot stat archive '%s'"),
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arfname);
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return fd;
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}
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|
|
static void
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not_found (int argc, char *argv[argc], bool found[argc])
|
{
|
for (int i = 0; i < argc; ++i)
|
if (!found[i])
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printf (gettext ("no entry %s in archive\n"), argv[i]);
|
}
|
|
|
static int
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copy_content (Elf *elf, int newfd, off_t off, size_t n)
|
{
|
size_t len;
|
char *rawfile = elf_rawfile (elf, &len);
|
|
assert (off + n <= len);
|
|
/* Tell the kernel we will read all the pages sequentially. */
|
size_t ps = sysconf (_SC_PAGESIZE);
|
if (n > 2 * ps)
|
posix_madvise (rawfile + (off & ~(ps - 1)), n, POSIX_MADV_SEQUENTIAL);
|
|
return write_retry (newfd, rawfile + off, n) != (ssize_t) n;
|
}
|
|
|
static int
|
do_oper_extract (int oper, const char *arfname, char **argv, int argc,
|
long int instance)
|
{
|
bool found[argc > 0 ? argc : 1];
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memset (found, '\0', sizeof (found));
|
|
size_t name_max = 0;
|
inline bool should_truncate_fname (void)
|
{
|
if (errno == ENAMETOOLONG && allow_truncate_fname)
|
{
|
if (name_max == 0)
|
{
|
long int len = pathconf (".", _PC_NAME_MAX);
|
if (len > 0)
|
name_max = len;
|
}
|
return name_max != 0;
|
}
|
return false;
|
}
|
|
off_t index_off = -1;
|
size_t index_size = 0;
|
off_t cur_off = SARMAG;
|
|
int status = 0;
|
Elf *elf;
|
int fd = open_archive (arfname, O_RDONLY, 0, &elf, NULL, false);
|
|
if (hcreate (2 * argc) == 0)
|
error (EXIT_FAILURE, errno, gettext ("cannot create hash table"));
|
|
for (int cnt = 0; cnt < argc; ++cnt)
|
{
|
ENTRY entry = { .key = argv[cnt], .data = &argv[cnt] };
|
if (hsearch (entry, ENTER) == NULL)
|
error (EXIT_FAILURE, errno,
|
gettext ("cannot insert into hash table"));
|
}
|
|
struct stat st;
|
if (force_symtab)
|
{
|
if (fstat (fd, &st) != 0)
|
{
|
error (0, errno, gettext ("cannot stat '%s'"), arfname);
|
close (fd);
|
return 1;
|
}
|
arlib_init ();
|
}
|
|
Elf_Cmd cmd = ELF_C_READ_MMAP;
|
Elf *subelf;
|
while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
|
{
|
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
|
|
if (strcmp (arhdr->ar_name, "/") == 0)
|
{
|
index_off = elf_getaroff (subelf);
|
index_size = arhdr->ar_size;
|
goto next;
|
}
|
if (strcmp (arhdr->ar_name, "//") == 0)
|
goto next;
|
|
if (force_symtab)
|
{
|
arlib_add_symbols (elf, arfname, arhdr->ar_name, cur_off);
|
cur_off += (((arhdr->ar_size + 1) & ~((off_t) 1))
|
+ sizeof (struct ar_hdr));
|
}
|
|
bool do_extract = argc <= 0;
|
if (!do_extract)
|
{
|
ENTRY entry;
|
entry.key = arhdr->ar_name;
|
ENTRY *res = hsearch (entry, FIND);
|
if (res != NULL && (instance < 0 || instance-- == 0)
|
&& !found[(char **) res->data - argv])
|
found[(char **) res->data - argv] = do_extract = true;
|
}
|
|
if (do_extract)
|
{
|
if (verbose)
|
{
|
if (oper == oper_print)
|
{
|
printf ("\n<%s>\n\n", arhdr->ar_name);
|
|
/* We have to flush now because now we use the descriptor
|
directly. */
|
fflush (stdout);
|
}
|
else if (oper == oper_list)
|
{
|
char datestr[100];
|
struct tm *tp = localtime (&arhdr->ar_date);
|
if (tp == NULL)
|
{
|
time_t time = 0;
|
tp = localtime (&time);
|
}
|
|
strftime (datestr, sizeof (datestr), "%b %e %H:%M %Y", tp);
|
|
printf ("%c%c%c%c%c%c%c%c%c %u/%u %6ju %s %s\n",
|
(arhdr->ar_mode & S_IRUSR) ? 'r' : '-',
|
(arhdr->ar_mode & S_IWUSR) ? 'w' : '-',
|
(arhdr->ar_mode & S_IXUSR)
|
? ((arhdr->ar_mode & S_ISUID) ? 's' : 'x')
|
: ((arhdr->ar_mode & S_ISUID) ? 'S' : '-'),
|
(arhdr->ar_mode & S_IRGRP) ? 'r' : '-',
|
(arhdr->ar_mode & S_IWGRP) ? 'w' : '-',
|
(arhdr->ar_mode & S_IXGRP)
|
? ((arhdr->ar_mode & S_ISGID) ? 's' : 'x')
|
: ((arhdr->ar_mode & S_ISGID) ? 'S' : '-'),
|
(arhdr->ar_mode & S_IROTH) ? 'r' : '-',
|
(arhdr->ar_mode & S_IWOTH) ? 'w' : '-',
|
(arhdr->ar_mode & S_IXOTH)
|
? ((arhdr->ar_mode & S_ISVTX) ? 't' : 'x')
|
: ((arhdr->ar_mode & S_ISVTX) ? 'T' : '-'),
|
arhdr->ar_uid,
|
arhdr->ar_gid,
|
(uintmax_t) arhdr->ar_size,
|
datestr,
|
arhdr->ar_name);
|
}
|
else
|
printf ("x - %s\n", arhdr->ar_name);
|
}
|
|
if (oper == oper_list)
|
{
|
if (!verbose)
|
puts (arhdr->ar_name);
|
|
goto next;
|
}
|
|
size_t nleft;
|
char *data = elf_rawfile (subelf, &nleft);
|
if (data == NULL)
|
{
|
error (0, 0, gettext ("cannot read content of %s: %s"),
|
arhdr->ar_name, elf_errmsg (-1));
|
status = 1;
|
goto next;
|
}
|
|
int xfd;
|
char tempfname[] = "XXXXXX";
|
bool use_mkstemp = true;
|
|
if (oper == oper_print)
|
xfd = STDOUT_FILENO;
|
else
|
{
|
xfd = mkstemp (tempfname);
|
if (unlikely (xfd == -1))
|
{
|
/* We cannot create a temporary file. Try to overwrite
|
the file or create it if it does not exist. */
|
int flags = O_WRONLY | O_CREAT;
|
if (dont_replace_existing)
|
flags |= O_EXCL;
|
else
|
flags |= O_TRUNC;
|
xfd = open (arhdr->ar_name, flags, 0600);
|
if (unlikely (xfd == -1))
|
{
|
int printlen = INT_MAX;
|
|
if (should_truncate_fname ())
|
{
|
/* Try to truncate the name. First find out by how
|
much. */
|
printlen = name_max;
|
char truncfname[name_max + 1];
|
*((char *) mempcpy (truncfname, arhdr->ar_name,
|
name_max)) = '\0';
|
|
xfd = open (truncfname, flags, 0600);
|
}
|
|
if (xfd == -1)
|
{
|
error (0, errno, gettext ("cannot open %.*s"),
|
(int) printlen, arhdr->ar_name);
|
status = 1;
|
goto next;
|
}
|
}
|
|
use_mkstemp = false;
|
}
|
}
|
|
ssize_t n;
|
while ((n = TEMP_FAILURE_RETRY (write (xfd, data, nleft))) != -1)
|
{
|
nleft -= n;
|
if (nleft == 0)
|
break;
|
data += n;
|
}
|
|
if (unlikely (n == -1))
|
{
|
error (0, errno, gettext ("failed to write %s"), arhdr->ar_name);
|
status = 1;
|
unlink (tempfname);
|
close (xfd);
|
goto next;
|
}
|
|
if (oper != oper_print)
|
{
|
/* Fix up the mode. */
|
if (unlikely (fchmod (xfd, arhdr->ar_mode) != 0))
|
{
|
error (0, errno, gettext ("cannot change mode of %s"),
|
arhdr->ar_name);
|
status = 0;
|
}
|
|
if (preserve_dates)
|
{
|
struct timespec tv[2];
|
tv[0].tv_sec = arhdr->ar_date;
|
tv[0].tv_nsec = 0;
|
tv[1].tv_sec = arhdr->ar_date;
|
tv[1].tv_nsec = 0;
|
|
if (unlikely (futimens (xfd, tv) != 0))
|
{
|
error (0, errno,
|
gettext ("cannot change modification time of %s"),
|
arhdr->ar_name);
|
status = 1;
|
}
|
}
|
|
/* If we used a temporary file, move it do the right
|
name now. */
|
if (use_mkstemp)
|
{
|
int r;
|
|
if (dont_replace_existing)
|
{
|
r = link (tempfname, arhdr->ar_name);
|
if (likely (r == 0))
|
unlink (tempfname);
|
}
|
else
|
r = rename (tempfname, arhdr->ar_name);
|
|
if (unlikely (r) != 0)
|
{
|
int printlen = INT_MAX;
|
|
if (should_truncate_fname ())
|
{
|
/* Try to truncate the name. First find out by how
|
much. */
|
printlen = name_max;
|
char truncfname[name_max + 1];
|
*((char *) mempcpy (truncfname, arhdr->ar_name,
|
name_max)) = '\0';
|
|
if (dont_replace_existing)
|
{
|
r = link (tempfname, truncfname);
|
if (likely (r == 0))
|
unlink (tempfname);
|
}
|
else
|
r = rename (tempfname, truncfname);
|
}
|
|
if (r != 0)
|
{
|
error (0, errno, gettext ("\
|
cannot rename temporary file to %.*s"),
|
printlen, arhdr->ar_name);
|
unlink (tempfname);
|
status = 1;
|
}
|
}
|
}
|
|
close (xfd);
|
}
|
}
|
|
next:
|
cmd = elf_next (subelf);
|
if (elf_end (subelf) != 0)
|
error (1, 0, "%s: %s", arfname, elf_errmsg (-1));
|
}
|
|
hdestroy ();
|
|
if (force_symtab)
|
{
|
arlib_finalize ();
|
|
if (symtab.symsnamelen != 0
|
/* We have to rewrite the file also if it initially had an index
|
but now does not need one anymore. */
|
|| (symtab.symsnamelen == 0 && index_size != 0))
|
{
|
char tmpfname[strlen (arfname) + 7];
|
strcpy (stpcpy (tmpfname, arfname), "XXXXXX");
|
int newfd = mkstemp (tmpfname);
|
if (unlikely (newfd == -1))
|
{
|
nonew:
|
error (0, errno, gettext ("cannot create new file"));
|
status = 1;
|
}
|
else
|
{
|
/* Create the header. */
|
if (unlikely (write_retry (newfd, ARMAG, SARMAG) != SARMAG))
|
{
|
// XXX Use /prof/self/fd/%d ???
|
nonew_unlink:
|
unlink (tmpfname);
|
if (newfd != -1)
|
close (newfd);
|
goto nonew;
|
}
|
|
/* Create the new file. There are three parts as far we are
|
concerned: 1. original context before the index, 2. the
|
new index, 3. everything after the new index. */
|
off_t rest_off;
|
if (index_off != -1)
|
rest_off = (index_off + sizeof (struct ar_hdr)
|
+ ((index_size + 1) & ~1ul));
|
else
|
rest_off = SARMAG;
|
|
if ((symtab.symsnamelen != 0
|
&& ((write_retry (newfd, symtab.symsoff,
|
symtab.symsofflen)
|
!= (ssize_t) symtab.symsofflen)
|
|| (write_retry (newfd, symtab.symsname,
|
symtab.symsnamelen)
|
!= (ssize_t) symtab.symsnamelen)))
|
/* Even if the original file had content before the
|
symbol table, we write it in the correct order. */
|
|| (index_off != SARMAG
|
&& copy_content (elf, newfd, SARMAG, index_off - SARMAG))
|
|| copy_content (elf, newfd, rest_off, st.st_size - rest_off)
|
/* Set the mode of the new file to the same values the
|
original file has. */
|
|| fchmod (newfd, st.st_mode & ALLPERMS) != 0
|
/* Never complain about fchown failing. */
|
|| (({asm ("" :: "r" (fchown (newfd, st.st_uid,
|
st.st_gid))); }),
|
close (newfd) != 0)
|
|| (newfd = -1, rename (tmpfname, arfname) != 0))
|
goto nonew_unlink;
|
}
|
}
|
}
|
|
elf_end (elf);
|
|
close (fd);
|
|
not_found (argc, argv, found);
|
|
return status;
|
}
|
|
|
struct armem
|
{
|
off_t off;
|
off_t old_off;
|
size_t size;
|
long int long_name_off;
|
struct armem *next;
|
void *mem;
|
time_t sec;
|
uid_t uid;
|
gid_t gid;
|
mode_t mode;
|
const char *name;
|
Elf *elf;
|
};
|
|
|
static int
|
write_member (struct armem *memb, off_t *startp, off_t *lenp, Elf *elf,
|
off_t end_off, int newfd)
|
{
|
struct ar_hdr arhdr;
|
/* The ar_name is not actually zero teminated, but we need that for
|
snprintf. Also if the name is too long, then the string starts
|
with '/' plus an index off number (decimal). */
|
char tmpbuf[sizeof (arhdr.ar_name) + 2];
|
|
bool changed_header = memb->long_name_off != -1;
|
if (changed_header)
|
{
|
/* In case of a long file name we assume the archive header
|
changed and we write it here. */
|
memcpy (&arhdr, elf_rawfile (elf, NULL) + *startp, sizeof (arhdr));
|
|
snprintf (tmpbuf, sizeof (tmpbuf), "/%-*ld",
|
(int) sizeof (arhdr.ar_name), memb->long_name_off);
|
changed_header = memcmp (arhdr.ar_name, tmpbuf,
|
sizeof (arhdr.ar_name)) != 0;
|
}
|
|
/* If the files are adjacent in the old file extend the range. */
|
if (*startp != -1 && !changed_header && *startp + *lenp == memb->old_off)
|
{
|
/* Extend the current range. */
|
*lenp += (memb->next != NULL
|
? memb->next->off : end_off) - memb->off;
|
return 0;
|
}
|
|
/* Write out the old range. */
|
if (*startp != -1 && copy_content (elf, newfd, *startp, *lenp))
|
return -1;
|
|
*startp = memb->old_off;
|
*lenp = (memb->next != NULL ? memb->next->off : end_off) - memb->off;
|
|
if (changed_header)
|
{
|
memcpy (arhdr.ar_name, tmpbuf, sizeof (arhdr.ar_name));
|
|
if (unlikely (write_retry (newfd, &arhdr, sizeof (arhdr))
|
!= sizeof (arhdr)))
|
return -1;
|
|
*startp += sizeof (struct ar_hdr);
|
assert ((size_t) *lenp >= sizeof (struct ar_hdr));
|
*lenp -= sizeof (struct ar_hdr);
|
}
|
|
return 0;
|
}
|
|
/* Store the name in the long name table if necessary.
|
Record its offset or -1 if we did not need to use the table. */
|
static void
|
remember_long_name (struct armem *mem, const char *name, size_t namelen)
|
{
|
mem->long_name_off = (namelen > MAX_AR_NAME_LEN
|
? arlib_add_long_name (name, namelen)
|
: -1l);
|
}
|
|
static int
|
do_oper_delete (const char *arfname, char **argv, int argc,
|
long int instance)
|
{
|
bool *found = alloca (sizeof (bool) * argc);
|
memset (found, '\0', sizeof (bool) * argc);
|
|
/* List of the files we keep. */
|
struct armem *to_copy = NULL;
|
|
int status = 0;
|
Elf *elf;
|
struct stat st;
|
int fd = open_archive (arfname, O_RDONLY, 0, &elf, &st, false);
|
|
if (hcreate (2 * argc) == 0)
|
error (EXIT_FAILURE, errno, gettext ("cannot create hash table"));
|
|
for (int cnt = 0; cnt < argc; ++cnt)
|
{
|
ENTRY entry = { .key = argv[cnt], .data = &argv[cnt] };
|
if (hsearch (entry, ENTER) == NULL)
|
error (EXIT_FAILURE, errno,
|
gettext ("cannot insert into hash table"));
|
}
|
|
arlib_init ();
|
|
off_t cur_off = SARMAG;
|
Elf_Cmd cmd = ELF_C_READ_MMAP;
|
Elf *subelf;
|
while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
|
{
|
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
|
|
/* Ignore the symbol table and the long file name table here. */
|
if (strcmp (arhdr->ar_name, "/") == 0
|
|| strcmp (arhdr->ar_name, "//") == 0)
|
goto next;
|
|
bool do_delete = argc <= 0;
|
if (!do_delete)
|
{
|
ENTRY entry;
|
entry.key = arhdr->ar_name;
|
ENTRY *res = hsearch (entry, FIND);
|
if (res != NULL && (instance < 0 || instance-- == 0)
|
&& !found[(char **) res->data - argv])
|
found[(char **) res->data - argv] = do_delete = true;
|
}
|
|
if (do_delete)
|
{
|
if (verbose)
|
printf ("d - %s\n", arhdr->ar_name);
|
}
|
else
|
{
|
struct armem *newp = alloca (sizeof (struct armem));
|
newp->old_off = elf_getaroff (subelf);
|
newp->off = cur_off;
|
|
cur_off += (((arhdr->ar_size + 1) & ~((off_t) 1))
|
+ sizeof (struct ar_hdr));
|
|
if (to_copy == NULL)
|
to_copy = newp->next = newp;
|
else
|
{
|
newp->next = to_copy->next;
|
to_copy = to_copy->next = newp;
|
}
|
|
/* If we recreate the symbol table read the file's symbol
|
table now. */
|
arlib_add_symbols (subelf, arfname, arhdr->ar_name, newp->off);
|
|
/* Remember long file names. */
|
remember_long_name (newp, arhdr->ar_name, strlen (arhdr->ar_name));
|
}
|
|
next:
|
cmd = elf_next (subelf);
|
if (elf_end (subelf) != 0)
|
error (1, 0, "%s: %s", arfname, elf_errmsg (-1));
|
}
|
|
arlib_finalize ();
|
|
hdestroy ();
|
|
/* Create a new, temporary file in the same directory as the
|
original file. */
|
char tmpfname[strlen (arfname) + 7];
|
strcpy (stpcpy (tmpfname, arfname), "XXXXXX");
|
int newfd = mkstemp (tmpfname);
|
if (unlikely (newfd == -1))
|
goto nonew;
|
|
/* Create the header. */
|
if (unlikely (write_retry (newfd, ARMAG, SARMAG) != SARMAG))
|
{
|
// XXX Use /prof/self/fd/%d ???
|
nonew_unlink:
|
unlink (tmpfname);
|
if (newfd != -1)
|
close (newfd);
|
nonew:
|
error (0, errno, gettext ("cannot create new file"));
|
status = 1;
|
goto errout;
|
}
|
|
/* If the archive is empty that is all we have to do. */
|
if (likely (to_copy != NULL))
|
{
|
/* Write the symbol table or the long file name table or both. */
|
if (symtab.symsnamelen != 0
|
&& ((write_retry (newfd, symtab.symsoff, symtab.symsofflen)
|
!= (ssize_t) symtab.symsofflen)
|
|| (write_retry (newfd, symtab.symsname, symtab.symsnamelen)
|
!= (ssize_t) symtab.symsnamelen)))
|
goto nonew_unlink;
|
|
if (symtab.longnameslen > sizeof (struct ar_hdr)
|
&& (write_retry (newfd, symtab.longnames, symtab.longnameslen)
|
!= (ssize_t) symtab.longnameslen))
|
goto nonew_unlink;
|
|
/* NULL-terminate the list of files to copy. */
|
struct armem *last = to_copy;
|
to_copy = to_copy->next;
|
last->next = NULL;
|
|
off_t start = -1;
|
off_t len = -1;
|
|
do
|
if (write_member (to_copy, &start, &len, elf, cur_off, newfd) != 0)
|
goto nonew_unlink;
|
while ((to_copy = to_copy->next) != NULL);
|
|
/* Write the last part. */
|
if (copy_content (elf, newfd, start, len))
|
goto nonew_unlink;
|
}
|
|
/* Set the mode of the new file to the same values the original file
|
has. */
|
if (fchmod (newfd, st.st_mode & ALLPERMS) != 0
|
/* Never complain about fchown failing. */
|
|| (({asm ("" :: "r" (fchown (newfd, st.st_uid, st.st_gid))); }),
|
close (newfd) != 0)
|
|| (newfd = -1, rename (tmpfname, arfname) != 0))
|
goto nonew_unlink;
|
|
errout:
|
elf_end (elf);
|
|
arlib_fini ();
|
|
close (fd);
|
|
not_found (argc, argv, found);
|
|
return status;
|
}
|
|
|
/* Prints the given value in the given buffer without a trailing zero char.
|
Returns false if the given value doesn't fit in the given buffer. */
|
static bool
|
no0print (bool ofmt, char *buf, int bufsize, long int val)
|
{
|
char tmpbuf[bufsize + 1];
|
int ret = snprintf (tmpbuf, sizeof (tmpbuf), ofmt ? "%-*lo" : "%-*ld",
|
bufsize, val);
|
if (ret >= (int) sizeof (tmpbuf))
|
return false;
|
memcpy (buf, tmpbuf, bufsize);
|
return true;
|
}
|
|
|
static int
|
do_oper_insert (int oper, const char *arfname, char **argv, int argc,
|
const char *member)
|
{
|
int status = 0;
|
Elf *elf = NULL;
|
struct stat st;
|
int fd = open_archive (arfname, O_RDONLY, 0, &elf, &st, oper != oper_move);
|
|
/* List of the files we keep. */
|
struct armem *all = NULL;
|
struct armem *after_memberelem = NULL;
|
struct armem **found = alloca (sizeof (*found) * argc);
|
memset (found, '\0', sizeof (*found) * argc);
|
|
arlib_init ();
|
|
/* Initialize early for no_old case. */
|
off_t cur_off = SARMAG;
|
|
if (fd == -1)
|
{
|
if (!suppress_create_msg)
|
fprintf (stderr, "%s: creating %s\n",
|
program_invocation_short_name, arfname);
|
|
goto no_old;
|
}
|
|
/* Store the names of all files from the command line in a hash
|
table so that we can match it. Note that when no file name is
|
given we are basically doing nothing except recreating the
|
index. */
|
if (oper != oper_qappend)
|
{
|
if (hcreate (2 * argc) == 0)
|
error (EXIT_FAILURE, errno, gettext ("cannot create hash table"));
|
|
for (int cnt = 0; cnt < argc; ++cnt)
|
{
|
ENTRY entry;
|
entry.key = full_path ? argv[cnt] : basename (argv[cnt]);
|
entry.data = &argv[cnt];
|
if (hsearch (entry, ENTER) == NULL)
|
error (EXIT_FAILURE, errno,
|
gettext ("cannot insert into hash table"));
|
}
|
}
|
|
/* While iterating over the current content of the archive we must
|
determine a number of things: which archive members to keep,
|
which are replaced, and where to insert the new members. */
|
Elf_Cmd cmd = ELF_C_READ_MMAP;
|
Elf *subelf;
|
while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
|
{
|
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
|
|
/* Ignore the symbol table and the long file name table here. */
|
if (strcmp (arhdr->ar_name, "/") == 0
|
|| strcmp (arhdr->ar_name, "//") == 0)
|
goto next;
|
|
struct armem *newp = alloca (sizeof (struct armem));
|
newp->old_off = elf_getaroff (subelf);
|
newp->size = arhdr->ar_size;
|
newp->sec = arhdr->ar_date;
|
newp->mem = NULL;
|
|
/* Remember long file names. */
|
remember_long_name (newp, arhdr->ar_name, strlen (arhdr->ar_name));
|
|
/* Check whether this is a file we are looking for. */
|
if (oper != oper_qappend)
|
{
|
/* Check whether this is the member used as the insert point. */
|
if (member != NULL && strcmp (arhdr->ar_name, member) == 0)
|
{
|
/* Note that all == NULL means insert at the beginning. */
|
if (ipos == ipos_before)
|
after_memberelem = all;
|
else
|
after_memberelem = newp;
|
member = NULL;
|
}
|
|
ENTRY entry;
|
entry.key = arhdr->ar_name;
|
ENTRY *res = hsearch (entry, FIND);
|
if (res != NULL && found[(char **) res->data - argv] == NULL)
|
{
|
found[(char **) res->data - argv] = newp;
|
|
/* If we insert before or after a certain element move
|
all files to a special list. */
|
if (unlikely (ipos != ipos_none || oper == oper_move))
|
{
|
if (after_memberelem == newp)
|
/* Since we remove this element even though we should
|
insert everything after it, we in fact insert
|
everything after the previous element. */
|
after_memberelem = all;
|
|
goto next;
|
}
|
}
|
}
|
|
if (all == NULL)
|
all = newp->next = newp;
|
else
|
{
|
newp->next = all->next;
|
all = all->next = newp;
|
}
|
|
next:
|
cmd = elf_next (subelf);
|
if (elf_end (subelf) != 0)
|
error (EXIT_FAILURE, 0, "%s: %s", arfname, elf_errmsg (-1));
|
}
|
|
if (oper != oper_qappend)
|
hdestroy ();
|
|
no_old:
|
if (member != NULL)
|
error (EXIT_FAILURE, 0, gettext ("position member %s not found"),
|
member);
|
|
if (oper == oper_move)
|
{
|
/* Make sure all requested elements are found in the archive. */
|
for (int cnt = 0; cnt < argc; ++cnt)
|
{
|
if (found[cnt] == NULL)
|
{
|
fprintf (stderr, gettext ("%s: no entry %s in archive!\n"),
|
program_invocation_short_name, argv[cnt]);
|
status = 1;
|
}
|
|
if (verbose)
|
printf ("m - %s\n", argv[cnt]);
|
}
|
}
|
else
|
{
|
/* Open all the new files, get their sizes and add all symbols. */
|
for (int cnt = 0; cnt < argc; ++cnt)
|
{
|
const char *bname = basename (argv[cnt]);
|
size_t bnamelen = strlen (bname);
|
if (found[cnt] == NULL)
|
{
|
found[cnt] = alloca (sizeof (struct armem));
|
found[cnt]->old_off = -1;
|
|
remember_long_name (found[cnt], bname, bnamelen);
|
}
|
|
struct stat newst;
|
Elf *newelf;
|
int newfd = open (argv[cnt], O_RDONLY);
|
if (newfd == -1)
|
{
|
error (0, errno, gettext ("cannot open %s"), argv[cnt]);
|
status = 1;
|
}
|
else if (fstat (newfd, &newst) == -1)
|
{
|
error (0, errno, gettext ("cannot stat %s"), argv[cnt]);
|
close (newfd);
|
status = 1;
|
}
|
else if (!S_ISREG (newst.st_mode))
|
{
|
error (0, errno, gettext ("%s is no regular file"), argv[cnt]);
|
close (newfd);
|
status = 1;
|
}
|
else if (update_newer
|
&& found[cnt]->old_off != -1l
|
&& found[cnt]->sec > st.st_mtime)
|
/* Do nothing, the file in the archive is younger. */
|
close (newfd);
|
else if ((newelf = elf_begin (newfd, ELF_C_READ_MMAP, NULL))
|
== NULL)
|
{
|
fprintf (stderr,
|
gettext ("cannot get ELF descriptor for %s: %s\n"),
|
argv[cnt], elf_errmsg (-1));
|
status = 1;
|
}
|
else
|
{
|
if (verbose)
|
printf ("%c - %s\n",
|
found[cnt]->old_off == -1l ? 'a' : 'r', argv[cnt]);
|
|
found[cnt]->elf = newelf;
|
found[cnt]->sec = arlib_deterministic_output ? 0 : newst.st_mtime;
|
found[cnt]->uid = arlib_deterministic_output ? 0 : newst.st_uid;
|
found[cnt]->gid = arlib_deterministic_output ? 0 : newst.st_gid;
|
found[cnt]->mode = newst.st_mode;
|
found[cnt]->name = bname;
|
|
found[cnt]->mem = elf_rawfile (newelf, &found[cnt]->size);
|
if (found[cnt]->mem == NULL
|
|| elf_cntl (newelf, ELF_C_FDDONE) != 0)
|
error (EXIT_FAILURE, 0, gettext ("cannot read %s: %s"),
|
argv[cnt], elf_errmsg (-1));
|
|
close (newfd);
|
|
if (found[cnt]->old_off != -1l)
|
/* Remember long file names. */
|
remember_long_name (found[cnt], bname, bnamelen);
|
}
|
}
|
}
|
|
if (status != 0)
|
{
|
elf_end (elf);
|
|
arlib_fini ();
|
|
close (fd);
|
|
return status;
|
}
|
|
/* If we have no entry point so far add at the end. AFTER_MEMBERELEM
|
being NULL when adding before an entry means add at the beginning. */
|
if (ipos != ipos_before && after_memberelem == NULL)
|
after_memberelem = all;
|
|
/* Convert the circular list into a normal list first. */
|
if (all != NULL)
|
{
|
struct armem *tmp = all;
|
all = all->next;
|
tmp->next = NULL;
|
}
|
|
struct armem *last_added = after_memberelem;
|
for (int cnt = 0; cnt < argc; ++cnt)
|
if (oper != oper_replace || found[cnt]->old_off == -1)
|
{
|
if (last_added == NULL)
|
{
|
found[cnt]->next = all;
|
last_added = all = found[cnt];
|
}
|
else
|
{
|
found[cnt]->next = last_added->next;
|
last_added = last_added->next = found[cnt];
|
}
|
}
|
|
/* Finally compute the offset and add the symbols for the files
|
after the insert point. */
|
if (likely (all != NULL))
|
for (struct armem *memp = all; memp != NULL; memp = memp->next)
|
{
|
memp->off = cur_off;
|
|
if (memp->mem == NULL)
|
{
|
Elf_Arhdr *arhdr;
|
/* Fake initializing arhdr and subelf to keep gcc calm. */
|
asm ("" : "=m" (arhdr), "=m" (subelf));
|
if (elf_rand (elf, memp->old_off) == 0
|
|| (subelf = elf_begin (fd, ELF_C_READ_MMAP, elf)) == NULL
|
|| (arhdr = elf_getarhdr (subelf)) == NULL)
|
/* This should never happen since we already looked at the
|
archive content. But who knows... */
|
error (EXIT_FAILURE, 0, "%s: %s", arfname, elf_errmsg (-1));
|
|
arlib_add_symbols (subelf, arfname, arhdr->ar_name, cur_off);
|
|
elf_end (subelf);
|
}
|
else
|
arlib_add_symbols (memp->elf, arfname, memp->name, cur_off);
|
|
cur_off += (((memp->size + 1) & ~((off_t) 1))
|
+ sizeof (struct ar_hdr));
|
}
|
|
/* Now we have all the information for the symbol table and long
|
file name table. Construct the final layout. */
|
arlib_finalize ();
|
|
/* Create a new, temporary file in the same directory as the
|
original file. */
|
char tmpfname[strlen (arfname) + 7];
|
strcpy (stpcpy (tmpfname, arfname), "XXXXXX");
|
int newfd;
|
if (fd != -1)
|
newfd = mkstemp (tmpfname);
|
else
|
{
|
newfd = open (arfname, O_RDWR | O_CREAT | O_EXCL, DEFFILEMODE);
|
if (newfd == -1 && errno == EEXIST)
|
/* Bah, first the file did not exist, now it does. Restart. */
|
return do_oper_insert (oper, arfname, argv, argc, member);
|
}
|
if (unlikely (newfd == -1))
|
goto nonew;
|
|
/* Create the header. */
|
if (unlikely (write_retry (newfd, ARMAG, SARMAG) != SARMAG))
|
{
|
nonew_unlink:
|
if (fd != -1)
|
{
|
// XXX Use /prof/self/fd/%d ???
|
unlink (tmpfname);
|
if (newfd != -1)
|
close (newfd);
|
}
|
nonew:
|
error (0, errno, gettext ("cannot create new file"));
|
status = 1;
|
goto errout;
|
}
|
|
/* If the new archive is not empty we actually have something to do. */
|
if (likely (all != NULL))
|
{
|
/* Write the symbol table or the long file name table or both. */
|
if (symtab.symsnamelen != 0
|
&& ((write_retry (newfd, symtab.symsoff, symtab.symsofflen)
|
!= (ssize_t) symtab.symsofflen)
|
|| (write_retry (newfd, symtab.symsname, symtab.symsnamelen)
|
!= (ssize_t) symtab.symsnamelen)))
|
goto nonew_unlink;
|
|
if (symtab.longnameslen > sizeof (struct ar_hdr)
|
&& (write_retry (newfd, symtab.longnames, symtab.longnameslen)
|
!= (ssize_t) symtab.longnameslen))
|
goto nonew_unlink;
|
|
off_t start = -1;
|
off_t len = -1;
|
|
while (all != NULL)
|
{
|
if (all->mem != NULL)
|
{
|
/* This is a new file. If there is anything from the
|
archive left to be written do it now. */
|
if (start != -1 && copy_content (elf, newfd, start, len))
|
goto nonew_unlink;
|
|
start = -1;
|
len = -1;
|
|
/* Create the header. */
|
struct ar_hdr arhdr;
|
/* The ar_name is not actually zero teminated, but we
|
need that for snprintf. Also if the name is too
|
long, then the string starts with '/' plus an index
|
off number (decimal). */
|
char tmpbuf[sizeof (arhdr.ar_name) + 2];
|
if (all->long_name_off == -1)
|
{
|
size_t namelen = strlen (all->name);
|
char *p = mempcpy (arhdr.ar_name, all->name, namelen);
|
*p++ = '/';
|
memset (p, ' ', sizeof (arhdr.ar_name) - namelen - 1);
|
}
|
else
|
{
|
snprintf (tmpbuf, sizeof (tmpbuf), "/%-*ld",
|
(int) sizeof (arhdr.ar_name), all->long_name_off);
|
memcpy (arhdr.ar_name, tmpbuf, sizeof (arhdr.ar_name));
|
}
|
|
if (! no0print (false, arhdr.ar_date, sizeof (arhdr.ar_date),
|
all->sec))
|
{
|
error (0, errno, gettext ("cannot represent ar_date"));
|
goto nonew_unlink;
|
}
|
if (! no0print (false, arhdr.ar_uid, sizeof (arhdr.ar_uid),
|
all->uid))
|
{
|
error (0, errno, gettext ("cannot represent ar_uid"));
|
goto nonew_unlink;
|
}
|
if (! no0print (false, arhdr.ar_gid, sizeof (arhdr.ar_gid),
|
all->gid))
|
{
|
error (0, errno, gettext ("cannot represent ar_gid"));
|
goto nonew_unlink;
|
}
|
if (! no0print (true, arhdr.ar_mode, sizeof (arhdr.ar_mode),
|
all->mode))
|
{
|
error (0, errno, gettext ("cannot represent ar_mode"));
|
goto nonew_unlink;
|
}
|
if (! no0print (false, arhdr.ar_size, sizeof (arhdr.ar_size),
|
all->size))
|
{
|
error (0, errno, gettext ("cannot represent ar_size"));
|
goto nonew_unlink;
|
}
|
memcpy (arhdr.ar_fmag, ARFMAG, sizeof (arhdr.ar_fmag));
|
|
if (unlikely (write_retry (newfd, &arhdr, sizeof (arhdr))
|
!= sizeof (arhdr)))
|
goto nonew_unlink;
|
|
/* Now the file itself. */
|
if (unlikely (write_retry (newfd, all->mem, all->size)
|
!= (off_t) all->size))
|
goto nonew_unlink;
|
|
/* Pad the file if its size is odd. */
|
if ((all->size & 1) != 0)
|
if (unlikely (write_retry (newfd, "\n", 1) != 1))
|
goto nonew_unlink;
|
}
|
else
|
{
|
/* This is a member from the archive. */
|
if (write_member (all, &start, &len, elf, cur_off, newfd)
|
!= 0)
|
goto nonew_unlink;
|
}
|
|
all = all->next;
|
}
|
|
/* Write the last part. */
|
if (start != -1 && copy_content (elf, newfd, start, len))
|
goto nonew_unlink;
|
}
|
|
/* Set the mode of the new file to the same values the original file
|
has. */
|
if (fd != -1
|
&& (fchmod (newfd, st.st_mode & ALLPERMS) != 0
|
/* Never complain about fchown failing. */
|
|| (({asm ("" :: "r" (fchown (newfd, st.st_uid, st.st_gid))); }),
|
close (newfd) != 0)
|
|| (newfd = -1, rename (tmpfname, arfname) != 0)))
|
goto nonew_unlink;
|
|
errout:
|
for (int cnt = 0; cnt < argc; ++cnt)
|
elf_end (found[cnt]->elf);
|
|
elf_end (elf);
|
|
arlib_fini ();
|
|
if (fd != -1)
|
close (fd);
|
|
return status;
|
}
|
|
|
#include "debugpred.h"
|
