560 lines
14 KiB
C
560 lines
14 KiB
C
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/* $Source: /u/mark/src/pax/RCS/pax.c,v $
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*
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* $Revision: 1.2 $
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*
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* DESCRIPTION
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*
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* Pax is the archiver described in IEEE P1003.2. It is an archiver
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* which understands both tar and cpio archives and has a new interface.
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*
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* SYNOPSIS
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*
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* pax -[cimopuvy] [-f archive] [-s replstr] [-t device] [pattern...]
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* pax -r [-cimopuvy] [-f archive] [-s replstr] [-t device] [pattern...]
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* pax -w [-adimuvy] [-b blocking] [-f archive] [-s replstr]...]
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* [-t device][-x format][pathname...]
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* pax -r -w [-ilmopuvy][-s replstr][pathname...] directory
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*
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* DESCRIPTION
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*
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* PAX - POSIX conforming tar and cpio archive handler. This
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* program implements POSIX conformant versions of tar, cpio and pax
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* archive handlers for UNIX. These handlers have defined befined
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* by the IEEE P1003.2 commitee.
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*
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* COMPILATION
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*
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* A number of different compile time configuration options are
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* available, please see the Makefile and config.h for more details.
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*
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* AUTHOR
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*
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* Mark H. Colburn, NAPS International (mark@jhereg.mn.org)
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*
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*
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* Sponsored by The USENIX Association for public distribution.
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*
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* Copyright (c) 1989 Mark H. Colburn.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice is duplicated in all such
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* forms and that any documentation, advertising materials, and other
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* materials related to such distribution and use acknowledge that the
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* software was developed * by Mark H. Colburn and sponsored by The
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* USENIX Association.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Log: pax.c,v $
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* Revision 1.2 89/02/12 10:05:17 mark
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* 1.2 release fixes
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*
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* Revision 1.1 88/12/23 18:02:23 mark
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* Initial revision
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*
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*/
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#ifndef lint
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static char *ident = "$Id: pax.c,v 1.2 89/02/12 10:05:17 mark Exp $";
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static char *copyright = "Copyright (c) 1989 Mark H. Colburn.\nAll rights reserved.\n";
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#endif /* ! lint */
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/* Headers */
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#define NO_EXTERN
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#include "pax.h"
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/* Globally Available Identifiers */
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char *ar_file; /* File containing name of archive */
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char *bufend; /* End of data within archive buffer */
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char *bufstart; /* Archive buffer */
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char *bufidx; /* Archive buffer index */
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char *myname; /* name of executable (argv[0]) */
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char **n_argv; /* Argv used by name routines */
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int n_argc; /* Argc used by name routines */
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int archivefd; /* Archive file descriptor */
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int blocking; /* Size of each block, in records */
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int gid; /* Group ID */
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int head_standard; /* true if archive is POSIX format */
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int ar_interface; /* defines interface we are using */
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int ar_format; /* defines current archve format */
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int mask; /* File creation mask */
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int ttyf; /* For interactive queries */
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int uid; /* User ID */
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int names_from_stdin; /* names for files are from stdin */
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OFFSET total; /* Total number of bytes transferred */
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short f_access_time; /* Reset access times of input files */
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short areof; /* End of input volume reached */
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short f_dir_create; /* Create missing directories */
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short f_append; /* Add named files to end of archive */
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short f_create; /* create a new archive */
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short f_extract; /* Extract named files from archive */
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short f_follow_links; /* follow symbolic links */
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short f_interactive; /* Interactivly extract files */
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short f_linksleft; /* Report on unresolved links */
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short f_list; /* List files on the archive */
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short f_modified; /* Don't restore modification times */
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short f_verbose; /* Turn on verbose mode */
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short f_link; /* link files where possible */
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short f_owner; /* extract files as the user */
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short f_pass; /* pass files between directories */
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short f_newer; /* append files to archive if newer */
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short f_disposition; /* ask for file disposition */
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short f_reverse_match; /* Reverse sense of pattern match */
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short f_mtime; /* Retain file modification time */
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short f_unconditional; /* Copy unconditionally */
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short f_quiet; /* Don't beep for volume change */ /* Xn */
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time_t now = 0; /* Current time */
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uint arvolume; /* Volume number */
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uint blocksize = BLOCKSIZE; /* Archive block size */
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FILE *msgfile; /* message outpu file stdout/stderr */
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Replstr *rplhead = (Replstr *)NULL; /* head of replstr list */
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Replstr *rpltail; /* pointer to tail of replstr list */
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/* Function Prototypes */
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#ifdef __STDC__
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static void usage(void);
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static OFFSET pax_optsize(char *);
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#else /* !__STDC__ */
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static void usage();
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static OFFSET pax_optsize();
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#endif /* __STDC__ */
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int do_pax(int ac, char **av);
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/* main - main routine for handling all archive formats.
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*
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* DESCRIPTION
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*
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* Set up globals and call the proper interface as specified by the user.
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*
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* PARAMETERS
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*
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* int argc - count of user supplied arguments
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* char **argv - user supplied arguments
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*
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* RETURNS
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*
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* Returns an exit code of 0 to the parent process.
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*/
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#ifdef __STDC__
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int main(int argc, char **argv)
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#else
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int main(argc, argv)
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int argc;
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char **argv;
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#endif
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{
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/* strip the pathname off of the name of the executable */
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#ifdef DF_TRACE_DEBUG
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printf("DF_TRACE_DEBUG: int main() in pax.c\n");
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#endif
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if ((myname = strrchr(argv[0], '/')) != (char *)NULL) {
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myname++;
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} else {
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myname = argv[0];
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}
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/* set upt for collecting other command line arguments */
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name_init(argc, argv);
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/* get all our necessary information */
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mask = umask(0);
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uid = getuid();
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gid = getgid();
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now = time((time_t *) 0);
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/* open terminal for interactive queries */
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ttyf = open_tty();
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if (strcmp(myname, "tar")==0) {
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do_tar(argc, argv);
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} else if (strcmp(myname, "cpio")==0) {
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do_cpio(argc, argv);
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} else {
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do_pax(argc, argv);
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}
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return 0; /* Xn */
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/* NOTREACHED */
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}
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/* do_pax - provide a PAX conformant user interface for archive handling
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*
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* DESCRIPTION
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*
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* Process the command line parameters given, doing some minimal sanity
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* checking, and then launch the specified archiving functions.
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*
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* PARAMETERS
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*
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* int ac - A count of arguments in av. Should be passed argc
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* from main
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* char **av - A pointer to an argument list. Should be passed
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* argv from main
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*
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* RETURNS
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*
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* Normally returns 0. If an error occurs, -1 is returned
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* and state is set to reflect the error.
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*
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*/
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#ifdef __STDC__
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int do_pax(int ac, char **av)
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#else
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int do_pax(ac, av)
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int ac; /* argument counter */
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char **av; /* arguments */
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#endif
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{
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int c;
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char *dirname;
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Stat st;
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/* default input/output file for PAX is STDIN/STDOUT */
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ar_file = "-";
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/*
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* set up the flags to reflect the default pax inteface. Unfortunately
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* the pax interface has several options which are completely opposite
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* of the tar and/or cpio interfaces...
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*/
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f_unconditional = 1;
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f_mtime = 1;
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f_dir_create = 1;
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f_list = 1;
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blocksize = 0;
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blocking = 0;
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ar_interface = PAX;
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ar_format = TAR; /* default interface if none given for -w */
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msgfile=stdout;
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#ifdef _POSIX2_SOURCE /* Xn */
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#ifdef DF_TRACE_DEBUG
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printf("DF_TRACE_DEBUG: int do_pax() in pax.c\n");
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#endif
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while ((c = getopt(ac, (const char * const *) av, "ab:cdf:ilmopqrs:t:uvwx:y")) != EOF) { /* Xn */
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#else /* Xn */
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while ((c = getopt(ac, av, "ab:cdf:ilmopqrs:t:uvwx:y")) != EOF) { /* Xn */
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#endif /* Xn */
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switch (c) {
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case 'a':
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f_append = 1;
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f_list = 0;
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break;
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case 'b':
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if ((blocksize = pax_optsize(optarg)) == 0) {
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fatal("Bad block size");
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}
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break;
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case 'c':
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f_reverse_match = 1;
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break;
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case 'd':
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f_dir_create = 0;
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break;
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case 'f':
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if (blocksize == 0) {
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blocking = 1;
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blocksize = 1 * BLOCKSIZE;
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}
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ar_file = optarg;
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break;
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case 'i':
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f_interactive = 1;
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break;
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case 'l':
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f_link = 1;
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break;
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case 'm':
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f_mtime = 0;
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break;
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case 'o':
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f_owner = 1;
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break;
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case 'p':
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f_access_time = 1;
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break;
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case 'q': /* Xn */
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f_quiet = 1; /* Xn */
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break; /* Xn */
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case 'r':
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if (f_create) {
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f_create = 0;
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f_pass = 1;
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} else {
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f_list = 0;
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f_extract = 1;
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}
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msgfile=stderr;
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break;
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case 's':
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add_replstr(optarg);
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break;
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case 't':
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if (blocksize == 0) {
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blocking = 1;
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blocksize = 10 * BLOCKSIZE;
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}
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ar_file = optarg;
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break;
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case 'u':
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f_unconditional = 1;
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break;
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case 'v':
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f_verbose = 1;
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break;
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case 'w':
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if (f_extract) {
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f_extract = 0;
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f_pass = 1;
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} else {
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f_list = 0;
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f_create = 1;
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}
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msgfile=stderr;
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break;
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case 'x':
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if (strcmp(optarg, "ustar") == 0) {
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ar_format = TAR;
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} else if (strcmp(optarg, "cpio") == 0) {
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ar_format = CPIO;
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} else {
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usage();
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}
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break;
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case 'y':
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f_disposition = 1;
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break;
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default:
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usage();
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}
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}
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if (blocksize == 0) {
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blocking = 1;
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blocksize = blocking * BLOCKSIZE;
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}
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buf_allocate((OFFSET) blocksize);
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if (f_extract || f_list) {
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open_archive(AR_READ);
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get_archive_type();
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read_archive();
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//DF_MSS
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exit(1);
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} else if (f_append) { /* this block used to be after the f_create--Xn */
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open_archive(AR_APPEND);
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get_archive_type();
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append_archive();
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} else if (f_create) {
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if (optind >= n_argc) {
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names_from_stdin++; /* args from stdin */
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}
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open_archive(AR_WRITE);
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create_archive();
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} else if (f_pass && optind < n_argc) {
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dirname = n_argv[--n_argc];
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if (LSTAT(dirname, &st) < 0) {
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fatal(strerror(errno)); /* Xn */
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}
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if ((st.sb_mode & S_IFMT) != S_IFDIR) {
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fatal("Not a directory");
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}
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if (optind >= n_argc) {
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names_from_stdin++; /* args from stdin */
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}
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pass(dirname);
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} else {
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usage();
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}
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||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* get_archive_type - determine input archive type from archive header
|
||
|
|
*
|
||
|
|
* DESCRIPTION
|
||
|
|
*
|
||
|
|
* reads the first block of the archive and determines the archive
|
||
|
|
* type from the data. If the archive type cannot be determined,
|
||
|
|
* processing stops, and a 1 is returned to the caller. If verbose
|
||
|
|
* mode is on, then the archive type will be printed on the standard
|
||
|
|
* error device as it is determined.
|
||
|
|
*
|
||
|
|
* FIXME
|
||
|
|
*
|
||
|
|
* be able to understand TAR and CPIO magic numbers
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
|
||
|
|
void get_archive_type(void)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
void get_archive_type()
|
||
|
|
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifdef DF_TRACE_DEBUG
|
||
|
|
printf("DF_TRACE_DEBUG: void get_archive_type() in pax.c\n");
|
||
|
|
#endif
|
||
|
|
if (ar_read() != 0) {
|
||
|
|
fatal("Unable to determine archive type.");
|
||
|
|
}
|
||
|
|
if (strncmp(bufstart, "070707", 6) == 0) {
|
||
|
|
ar_format = CPIO;
|
||
|
|
if (f_verbose) {
|
||
|
|
fputs("CPIO format archive\n", stderr);
|
||
|
|
}
|
||
|
|
} else if (strncmp(&bufstart[257], "ustar", 5) == 0) {
|
||
|
|
ar_format = TAR;
|
||
|
|
if (f_verbose) {
|
||
|
|
fputs("USTAR format archive\n", stderr);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ar_format = TAR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* pax_optsize - interpret a size argument
|
||
|
|
*
|
||
|
|
* DESCRIPTION
|
||
|
|
*
|
||
|
|
* Recognizes suffixes for blocks (512-bytes), k-bytes and megabytes.
|
||
|
|
* Also handles simple expressions containing '+' for addition.
|
||
|
|
*
|
||
|
|
* PARAMETERS
|
||
|
|
*
|
||
|
|
* char *str - A pointer to the string to interpret
|
||
|
|
*
|
||
|
|
* RETURNS
|
||
|
|
*
|
||
|
|
* Normally returns the value represented by the expression in the
|
||
|
|
* the string.
|
||
|
|
*
|
||
|
|
* ERRORS
|
||
|
|
*
|
||
|
|
* If the string cannot be interpretted, the program will fail, since
|
||
|
|
* the buffering will be incorrect.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
|
||
|
|
static OFFSET pax_optsize(char *str)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static OFFSET pax_optsize(str)
|
||
|
|
char *str; /* pointer to string to interpret */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
char *idx;
|
||
|
|
OFFSET number; /* temporary storage for current number */
|
||
|
|
OFFSET result; /* cumulative total to be returned to caller */
|
||
|
|
|
||
|
|
result = 0;
|
||
|
|
idx = str;
|
||
|
|
#ifdef DF_TRACE_DEBUG
|
||
|
|
printf("DF_TRACE_DEBUG: static OFFSET pax_optsize() in pax.c\n");
|
||
|
|
#endif
|
||
|
|
for (;;) {
|
||
|
|
number = 0;
|
||
|
|
while (*idx >= '0' && *idx <= '9')
|
||
|
|
number = number * 10 + *idx++ - '0';
|
||
|
|
switch (*idx++) {
|
||
|
|
case 'b':
|
||
|
|
result += number * 512L;
|
||
|
|
continue;
|
||
|
|
case 'k':
|
||
|
|
result += number * 1024L;
|
||
|
|
continue;
|
||
|
|
case 'm':
|
||
|
|
result += number * 1024L * 1024L;
|
||
|
|
continue;
|
||
|
|
case '+':
|
||
|
|
result += number;
|
||
|
|
continue;
|
||
|
|
case '\0':
|
||
|
|
result += number;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (*--idx) {
|
||
|
|
fatal("Unrecognizable value");
|
||
|
|
}
|
||
|
|
return (result);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* usage - print a helpful message and exit
|
||
|
|
*
|
||
|
|
* DESCRIPTION
|
||
|
|
*
|
||
|
|
* Usage prints out the usage message for the PAX interface and then
|
||
|
|
* exits with a non-zero termination status. This is used when a user
|
||
|
|
* has provided non-existant or incompatible command line arguments.
|
||
|
|
*
|
||
|
|
* RETURNS
|
||
|
|
*
|
||
|
|
* Returns an exit status of 1 to the parent process.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __STDC__
|
||
|
|
|
||
|
|
static void usage(void)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static void usage()
|
||
|
|
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifdef DF_TRACE_DEBUG
|
||
|
|
printf("DF_TRACE_DEBUG: static void usage() in pax.c\n");
|
||
|
|
#endif
|
||
|
|
fprintf(stderr, "Usage: %s -[cimopuvy] [-f archive] [-s replstr] [-t device] [pattern...]\n",
|
||
|
|
myname);
|
||
|
|
fprintf(stderr, " %s -r [-cimopuvy] [-f archive] [-s replstr] [-t device] [pattern...]\n",
|
||
|
|
myname);
|
||
|
|
fprintf(stderr, " %s -w [-adimuvy] [-b blocking] [-f archive] [-s replstr]\n [-t device] [-x format] [pathname...]\n",
|
||
|
|
myname);
|
||
|
|
fprintf(stderr, " %s -r -w [-ilmopuvy] [-s replstr] [pathname...] directory\n",
|
||
|
|
myname);
|
||
|
|
fprintf(stderr, "\nFor more information on %s syntax, see Command Reference\n", myname);
|
||
|
|
fprintf(stderr, "Help in the Windows Help file.");
|
||
|
|
exit(1);
|
||
|
|
}
|