tar.c File Reference

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include <tar.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utime.h>
#include <sys/wait.h>
#include <stdio.h>
#include <errno.h>
#include <dirent.h>

Include dependency graph for tar.c:

Go to the source code of this file.

Data Structures
struct	link
Defines
#define	POSIX_COMP
#define	DIRECT_3
#define	direct   dirent
#define	TRUE   1
#define	FALSE   0
#define	STRING_SIZE   256
#define	HEADER_SIZE   TBLOCK
#define	NAME_SIZE   NAMSIZ
#define	m_name   name
#define	m_mode   mode
#define	m_uid   uid
#define	m_gid   gid
#define	m_size   size
#define	m_time   mtime
#define	m_checksum   chksum
#define	m_linked   typeflag
#define	m_link   linkname
#define	hdr_block   dummy
#define	m   header
#define	member   dbuf
#define	INT_TYPE   (sizeof(header.member.m_uid))
#define	LONG_TYPE   (sizeof(header.member.m_size))
#define	NIL_HEADER   ((HEADER *) 0)
#define	NIL_PTR   ((char *) 0)
#define	TBLOCK_SIZE   TBLOCK
#define	flush()   print(NIL_PTR)
#define	block_size()
Typedefs
typedef char	BOOL
typedef hblock	HEADER
Functions
	_PROTOTYPE (int main,(int argc, char **argv))
	_PROTOTYPE (void error,(char *s1, char *s2))
	_PROTOTYPE (BOOL get_header,(void))
	_PROTOTYPE (void tarfile,(void))
	_PROTOTYPE (void extract,(char *file))
	_PROTOTYPE (void copy,(char *file, int from, int to, long bytes))
	_PROTOTYPE (long convert,(char str[], int type))
	_PROTOTYPE (int checksum,(void))
	_PROTOTYPE (int is_dir,(char *file))
	_PROTOTYPE (char *path_name,(char *file))
	_PROTOTYPE (void add_path,(char *name))
	_PROTOTYPE (void add_close,(int fd))
	_PROTOTYPE (int add_open,(char *file, struct stat *st))
	_PROTOTYPE (void make_header,(char *file, struct stat *st))
	_PROTOTYPE (void is_added,(struct stat *st, char *file))
	_PROTOTYPE (void is_deleted,(struct stat *st))
	_PROTOTYPE (char *is_linked,(struct stat *st))
	_PROTOTYPE (void mread,(int fd, char *address, int bytes))
	_PROTOTYPE (int bread,(int fd, char *address, int bytes))
	_PROTOTYPE (void print,(char *str))
	_PROTOTYPE (char *num_out,(long number))
	_PROTOTYPE (void string_print,(char *buffer, char *fmt,...))
void	error (char *s1, char *s2)
int	main (int argc, argv)
BOOL	get_header ()
void	tarfile ()
void	skip_entry ()
void	extract (char *file)
void	delete (char *file)
void	do_chown (char *file)
void	timestamp (char *file)
void	copy (char *file, int from, int to, long bytes)
long	convert (str, int type)
int	checksum ()
int	is_dir (char *file)
char *	path_name (char *file)
void	add_path (char *name)
void	add_file (char *file)
void	verb_print (char *s1, char *s2)
void	add_close (int fd)
int	add_open (char *file, struct stat *st)
void	make_header (char *file, struct stat *st)
void	is_added (struct stat *st, char *file)
void	is_deleted (struct stat *st)
char *	is_linked (struct stat *st)
void	clear_header ()
void	adjust_boundary ()
void	mread (int fd, char *address, int bytes)
void	mwrite (int fd, char *address, int bytes)
int	bread (int fd, char *address, int bytes)
int	bwrite (int fd, char *address, int bytes)
void	print (char *str)
char *	num_out (long number)
void	string_print (char *buffer, char *fmt)
Variables
link *	link_top
HEADER	header
BOOL	show_fl
BOOL	creat_fl
BOOL	ext_fl
int	tar_fd
char	usage [] = "Usage: tar [cxt][vo][F][f] tarfile [files]."
char	io_buffer [TBLOCK_SIZE]
char	path [NAME_SIZE]
char	pathname [NAME_SIZE]
int	force_flag = 0
int	chown_flag = 0
int	verbose_flag = 0
int	norec_flag = 0
ino_t	ar_inode
dev_t	ar_dev
int	total_blocks
int	u_mask
char	output [TBLOCK_SIZE]

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Define Documentation

#define block_size (   )

Value: (int) ((convert(header.member.m_size, LONG_TYPE) \ + (long) TBLOCK_SIZE - 1) / (long) TBLOCK_SIZE) Definition at line 188 of file tar.c. Referenced by add_z_2(), alloc_block(), alloc_inode(), allocate_buffer(), allocbitmap(), bf_append(), bf_pack(), chkdev(), chkdirzone(), chksuper(), Data_Block(), devio(), devread(), devwrite(), df(), diskio(), dodir(), dumpbitmap(), eat_dir(), eat_file(), enter_dir(), file_vir2sec(), get_block(), getsuper(), incr_link(), incr_size(), loadbitmap(), main(), make_bootable(), print_fs(), printtotal(), put_block(), r_readdir(), r_stat(), r_super(), r_vir2abs(), rahead(), read_ahead(), read_write(), rw_block(), rw_scattered(), select_image(), sizeup(), skip_entry(), super(), tape_inquire(), tarfile(), and was_blk_special().

#define direct   dirent

Definition at line 85 of file tar.c.

#define DIRECT_3

Definition at line 78 of file tar.c.

#define FALSE   0

Definition at line 101 of file tar.c.

#define flush (  void   )     print(NIL_PTR)

Definition at line 161 of file tar.c.

#define hdr_block   dummy

Definition at line 120 of file tar.c.

#define HEADER_SIZE   TBLOCK

Definition at line 104 of file tar.c.

#define INT_TYPE   (sizeof(header.member.m_uid))

Definition at line 154 of file tar.c. Referenced by checksum(), do_chown(), extract(), and get_header().

#define LONG_TYPE   (sizeof(header.member.m_size))

Definition at line 155 of file tar.c. Referenced by extract(), and timestamp().

#define m   header

Definition at line 121 of file tar.c. Referenced by _exit(), _ext_str_cvt(), _pm_findproc(), _read_pm(), _write_pm(), access(), ack_get_operand(), ack_get_statement(), add_reductions(), alarm(), alloc(), allocmem(), aohand(), argmatch(), argscan(), bas_get_operand(), bas_get_statement(), brk(), build_tree(), chdir(), chmod(), chown(), chroot(), cihand(), clock_task(), close(), creat(), crnlcat(), decode_ioctl(), default_goto(), delete(), dev_status(), devctl(), do_change(), do_diagnostics(), do_exec(), do_ioctl(), do_kbd(), do_kbdaux(), do_status(), do_video(), env_get_param(), execve(), fallbackQSort3(), fchdir(), fcntl(), filbuf(), fill_window(), fkey_ctl(), fmode(), fork(), freemem(), fstat(), fstatfs(), fsync(), ftruncate(), func_key(), gen_bitlen(), getegid(), geteuid(), getgid(), getn(), getnpid(), getnprocnr(), getpgrp(), getpid(), getppid(), getpprocnr(), getpriority(), getprocnr(), getsigset(), getsysinfo(), gettimeofday(), getuid(), getuptime(), glob2(), glob3(), gnu_get_statement(), gz_open(), gzerror(), handle_req(), handle_status(), image_dmp(), imhand(), indx(), input(), ioctl(), itoa(), kbd_status(), kill(), kputc(), link(), ljhand(), lookup(), lseek(), lstat(), m_init(), m_ioctl(), mail(), main(), mainQSort3(), Malloc(), matcher(), mihand(), mini_notify(), mini_receive(), mkdir(), mknod(), mount(), mqhand(), mvhand(), open(), panic(), pause(), pci_attr_r16(), pci_attr_r32(), pci_attr_r8(), pci_attr_w16(), pci_attr_w32(), pci_attr_w8(), pci_dev_name(), pci_find_dev(), pci_first_dev(), pci_ids(), pci_init1(), pci_next_dev(), pci_rescan_bus(), pci_reserve(), pci_slot_name(), pipe(), prepare_shutdown(), print_dir_date(), process_req_q(), ptrace(), range_parse(), read(), read_header(), read_symbol(), reader(), readlink(), reboot(), rehand(), rename(), reply(), rmdir(), save_column(), search_mnem(), select(), setdash(), setegid(), seteuid(), setgid(), setpriority(), setsid(), setuid(), sigaction(), sigpending(), sigprocmask(), sigreturn(), sigsuspend(), sjhand(), sr_get_userdata(), sr_put_userdata(), sr_repl_queue(), start_service(), startprocess(), stat(), stime(), Strfun(), subst(), svrctl(), symlink(), sync(), sys_abort(), sys_endksig(), sys_exec(), sys_exit(), sys_fork(), sys_getinfo(), sys_getksig(), sys_int86(), sys_kill(), sys_newmap(), sys_nice(), sys_privctl(), sys_segctl(), sys_setalarm(), sys_sigreturn(), sys_sigsend(), sys_svrctl(), sys_task(), sys_times(), sys_trace(), sys_umap(), sys_vm_map(), sys_vm_setbuf(), tell_fs(), test16a(), test7c(), tickdelay(), time(), timegmt(), times(), tqhand(), truncate(), umask(), umount(), unlink(), utime(), w_hw_int(), w_intr_wait(), w_other(), wait(), waitpid(), and write().

#define m_checksum   chksum

Definition at line 117 of file tar.c.

#define m_gid   gid

Definition at line 114 of file tar.c.

#define m_link   linkname

Definition at line 119 of file tar.c.

#define m_linked   typeflag

Definition at line 118 of file tar.c.

#define m_mode   mode

Definition at line 112 of file tar.c.

#define m_name   name

Definition at line 111 of file tar.c.

#define m_size   size

Definition at line 115 of file tar.c.

#define m_time   mtime

Definition at line 116 of file tar.c.

#define m_uid   uid

Definition at line 113 of file tar.c.

#define member   dbuf

Definition at line 122 of file tar.c. Referenced by add(), get(), get_member(), and trymandir().

#define NAME_SIZE   NAMSIZ

Definition at line 105 of file tar.c.

#define NIL_HEADER   ((HEADER *) 0)

Definition at line 157 of file tar.c.

#define NIL_PTR   ((char *) 0)

Definition at line 158 of file tar.c.

#define POSIX_COMP

Definition at line 77 of file tar.c.

#define STRING_SIZE   256

Definition at line 103 of file tar.c. Referenced by string_print().

#define TBLOCK_SIZE   TBLOCK

Definition at line 159 of file tar.c. Referenced by checksum(), clear_header(), copy(), print(), and skip_entry().

#define TRUE   1

Definition at line 100 of file tar.c.

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Typedef Documentation

typedef char BOOL

Definition at line 99 of file tar.c.

typedef union hblock HEADER

Definition at line 108 of file tar.c.

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Function Documentation

_PROTOTYPE (  void  string_print, (char *buffer, char *fmt,...)  )

_PROTOTYPE (  char *  num_out, (long number)  )

_PROTOTYPE (  void  print, (char *str)  )

_PROTOTYPE (  int  bread, (int fd, char *address, int bytes)  )

_PROTOTYPE (  void  mread, (int fd, char *address, int bytes)  )

_PROTOTYPE (  char *  is_linked, (struct stat *st)  )

_PROTOTYPE (  void  is_deleted, (struct stat *st)  )

_PROTOTYPE (  void  is_added, (struct stat *st, char *file)  )

_PROTOTYPE (  void  make_header, (char *file, struct stat *st)  )

_PROTOTYPE (  int  add_open, (char *file, struct stat *st)  )

_PROTOTYPE (  void  add_close, (int fd)  )

_PROTOTYPE (  void  add_path, (char *name)  )

_PROTOTYPE (  char *  path_name, (char *file)  )

_PROTOTYPE (  int  is_dir, (char *file)  )

_PROTOTYPE (  int  checksum, (void)  )

_PROTOTYPE (  long  convert, (char str[], int type)  )

_PROTOTYPE (  void  copy, (char *file, int from, int to, long bytes)  )

_PROTOTYPE (  void  extract, (char *file)  )

_PROTOTYPE (  void  tarfile, (void)  )

_PROTOTYPE (  BOOL  get_header, (void)  )

_PROTOTYPE (  void  error, (char *s1, char *s2)  )

_PROTOTYPE (  int  main, (int argc, char **argv)  )

void add_close (  int  fd  )

Definition at line 839 of file tar.c. References close. Referenced by add_file().

void add_file (  char *  file  )

Definition at line 664 of file tar.c. References add_close(), add_open(), add_path(), ar_dev, ar_inode, bread(), chdir, closedir, copy, cwd, direct::d_name, dir, DIRSIZ, errno, getcwd, header, if(), is_added(), is_deleted(), is_linked(), lstat, make_header(), mread(), mwrite(), NAMSIZ, NIL_PTR, norec_flag, NULL, opendir, path_name, readdir, readlink, S_IFBLK, S_IFCHR, S_IFDIR, S_IFIFO, S_IFLNK, S_IFMT, S_IFREG, st, stat::st_dev, stat::st_ino, stat::st_mode, stat::st_size, stat, strcmp, strcpy(), strerror(), string_print, strncpy(), tar_fd, TSIZLEN, verb_print(), and verbose_flag.

int add_open (  char *  file, struct stat *  st )

Definition at line 848 of file tar.c. References errno, fprintf(), O_RDONLY, open, S_IFDIR, S_IFMT, S_IFREG, st, stat::st_mode, stderr, and strerror(). Referenced by add_file().

void add_path (  char *  name  )

Definition at line 638 of file tar.c. References error, NAME_SIZE, NIL_PTR, and path.

void adjust_boundary (   )

Definition at line 963 of file tar.c. References clear_header(), close, header, mwrite(), tar_fd, and total_blocks.

int bread (  int  fd, char *  address, int  bytes )

Definition at line 992 of file tar.c. References n, r, and read.

int bwrite (  int  fd, char *  address, int  bytes )

Definition at line 1008 of file tar.c. References n, r, and write.

int checksum (   )

Definition at line 608 of file tar.c. References header, INT_TYPE, ptr, and TBLOCK_SIZE.

void clear_header (   )

Definition at line 956 of file tar.c. References header, ptr, and TBLOCK_SIZE. Referenced by adjust_boundary(), and make_header().

long convert (  str  , int  type )

Definition at line 591 of file tar.c. References L, and long(). Referenced by do_chown(), extract(), get_header(), main(), and timestamp().

void copy (  char *  file, int  from, int  to, long  bytes )

Definition at line 572 of file tar.c. References blocks, bread(), int(), io_buffer, long(), mwrite(), NIL_PTR, string_print, tar_fd, TBLOCK_SIZE, and verbose_flag.

void delete (  char *  file  )

Definition at line 522 of file tar.c. References rmdir, S_ISDIR, stat::st_mode, stat, and unlink.

void do_chown (  char *  file  )

Definition at line 534 of file tar.c. References chmod, chown, chown_flag, convert(), getgrnam(), getpwnam(), gid, group::gr_gid, header, int(), INT_TYPE, NULL, passwd::pw_uid, pwd, strncmp(), timestamp(), TMAGIC, TMAGLEN, u_mask, and uid.

void error (  char *  s1, char *  s2 )

Definition at line 224 of file tar.c. References exit(), flush, NIL_PTR, and string_print.

void extract (  char *  file  )

Definition at line 412 of file tar.c. References access, close, convert(), copy, creat, do_chown(), errno, header, index(), int(), INT_TYPE, link, LONG_TYPE, mkdir, mkfifo, mknod, NIL_PTR, print, r, S_IFBLK, S_IFCHR, strerror(), string_print, symlink, tar_fd, verb_print(), and verbose_flag.

BOOL get_header (   )

Definition at line 332 of file tar.c. References check, checksum(), convert(), error, FALSE, force_flag, header, int(), INT_TYPE, mread(), NIL_PTR, tar_fd, and TRUE. Referenced by tarfile().

void is_added (  struct stat *  st, char *  file )

Definition at line 901 of file tar.c. References link::dev, link_top, malloc(), NULL, path_name, print, strcpy(), and strlen(). Referenced by add_file().

void is_deleted (  struct stat *  st  )

Definition at line 923 of file tar.c. References free, link_top, link::next, and NULL. Referenced by add_file().

int is_dir (  char *  file  )

Definition at line 621 of file tar.c.

char* is_linked (  struct stat *  st  )

Definition at line 934 of file tar.c. References link::dev, link::ino, link_top, link::name, NAMSIZ, link::next, link::nlink, NULL, and strncpy(). Referenced by add_file().

int main (  int  argc, argv  )

Definition at line 232 of file tar.c. References chown_flag, creat_fl, error, ext_fl, force_flag, i, NIL_PTR, norec_flag, ptr, show_fl, st, TRUE, umask, usage, and verbose_flag.

void make_header (  char *  file, struct stat *  st )

Definition at line 862 of file tar.c. References clear_header(), getgrgid(), getpwuid(), group::gr_name, header, NULL, ptr, passwd::pw_name, pwd, S_IFBLK, S_IFCHR, S_IFDIR, S_IFMT, S_IFREG, string_print, strncpy(), TGNMLEN, TMAGIC, TMAGLEN, TSIZLEN, and TUNMLEN. Referenced by add_file().

void mread (  int  fd, char *  address, int  bytes )

Definition at line 976 of file tar.c. References bread(), error, and NIL_PTR.

void mwrite (  int  fd, char *  address, int  bytes )

Definition at line 983 of file tar.c. References bwrite(), error, NIL_PTR, and total_blocks.

char* num_out (  long  number  )

Definition at line 1045 of file tar.c. References i. Referenced by change(), file_insert(), GOTO(), scratch_file(), string_print(), and yank().

char* path_name (  char *  file  )

Definition at line 630 of file tar.c. References path, and string_print.

void print (  char *  str  )

Definition at line 1025 of file tar.c. References indx(), NIL_PTR, tar_fd, TBLOCK_SIZE, and write.

void skip_entry (   )

Definition at line 405 of file tar.c. References block_size, blocks, bread(), io_buffer, tar_fd, and TBLOCK_SIZE. Referenced by tarfile().

void string_print (  char *  buffer, char *  fmt )

Definition at line 1063 of file tar.c. References args, BOOL, buf_ptr, i, NIL_PTR, num_out(), pr_fl, print, STRING_SIZE, va_arg, va_end, and va_start.

void tarfile (   )

Definition at line 352 of file tar.c. References block_size, flush, get_header(), header, is_dir, NIL_PTR, skip_entry(), string_print, strncpy(), TSIZLEN, verb_print(), and verbose_flag.

void timestamp (  char *  file  )

Definition at line 563 of file tar.c. References buf, convert(), header, LONG_TYPE, and utime.

void verb_print (  char *  s1, char *  s2 )

Definition at line 833 of file tar.c. References NIL_PTR, string_print, and verbose_flag. Referenced by add_file(), extract(), and tarfile().

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Variable Documentation

dev_t ar_dev

Definition at line 183 of file tar.c. Referenced by add_file().

ino_t ar_inode

Definition at line 182 of file tar.c. Referenced by add_file().

int chown_flag = 0

Definition at line 176 of file tar.c. Referenced by do_chown(), and main().

BOOL creat_fl

Definition at line 163 of file tar.c. Referenced by main().

BOOL ext_fl

Definition at line 163 of file tar.c. Referenced by main().

int force_flag = 0

Definition at line 171 of file tar.c. Referenced by get_header(), and main().

HEADER header

Definition at line 152 of file tar.c.

char io_buffer[TBLOCK_SIZE]

Definition at line 168 of file tar.c.

struct link * link_top

Referenced by is_added(), is_deleted(), and is_linked().

int norec_flag = 0

Definition at line 179 of file tar.c. Referenced by add_file(), and main().

char output[TBLOCK_SIZE]

Definition at line 1024 of file tar.c.

char path[NAME_SIZE]

Definition at line 169 of file tar.c.

char pathname[NAME_SIZE]

Definition at line 170 of file tar.c.

BOOL show_fl

Definition at line 163 of file tar.c.

int tar_fd

Definition at line 165 of file tar.c. Referenced by add_file(), adjust_boundary(), copy(), extract(), get_header(), print(), and skip_entry().

int total_blocks

Definition at line 185 of file tar.c. Referenced by adjust_boundary(), and mwrite().

int u_mask

Definition at line 186 of file tar.c.

static void usage = "Usage: tar [cxt][vo][F][f] tarfile [files]."

Definition at line 167 of file tar.c. Referenced by cache2file(), cache_reply(), domonth(), doyear(), getargs(), ifname2n(), letterToCode(), main(), make_time(), mattrib(), mcat(), mcopy(), mdel(), mdir(), mdoctorfat(), mdu(), mformat(), minfo(), mlabel(), mmd(), mmove(), mpartition(), mshowfat(), parse(), parse_args_init_io(), parse_time(), and setoption().

int verbose_flag = 0

Definition at line 177 of file tar.c.

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