Annotation of src/usr.bin/file/tar.h, Revision 1.1
1.1 ! deraadt 1: /*
! 2: * Header file for public domain tar (tape archive) program.
! 3: *
! 4: * @(#)tar.h 1.20 86/10/29 Public Domain.
! 5: *
! 6: * Created 25 August 1985 by John Gilmore, ihnp4!hoptoad!gnu.
! 7: *
! 8: * $Id: tar.h,v 1.4 1995/03/25 22:36:45 christos Exp $ # checkin only
! 9: */
! 10:
! 11: /*
! 12: * Kludge for handling systems that can't cope with multiple
! 13: * external definitions of a variable. In ONE routine (tar.c),
! 14: * we #define TAR_EXTERN to null; here, we set it to "extern" if
! 15: * it is not already set.
! 16: */
! 17: #ifndef TAR_EXTERN
! 18: #define TAR_EXTERN extern
! 19: #endif
! 20:
! 21: /*
! 22: * Header block on tape.
! 23: *
! 24: * I'm going to use traditional DP naming conventions here.
! 25: * A "block" is a big chunk of stuff that we do I/O on.
! 26: * A "record" is a piece of info that we care about.
! 27: * Typically many "record"s fit into a "block".
! 28: */
! 29: #define RECORDSIZE 512
! 30: #define NAMSIZ 100
! 31: #define TUNMLEN 32
! 32: #define TGNMLEN 32
! 33:
! 34: union record {
! 35: char charptr[RECORDSIZE];
! 36: struct header {
! 37: char name[NAMSIZ];
! 38: char mode[8];
! 39: char uid[8];
! 40: char gid[8];
! 41: char size[12];
! 42: char mtime[12];
! 43: char chksum[8];
! 44: char linkflag;
! 45: char linkname[NAMSIZ];
! 46: char magic[8];
! 47: char uname[TUNMLEN];
! 48: char gname[TGNMLEN];
! 49: char devmajor[8];
! 50: char devminor[8];
! 51: } header;
! 52: };
! 53:
! 54: /* The checksum field is filled with this while the checksum is computed. */
! 55: #define CHKBLANKS " " /* 8 blanks, no null */
! 56:
! 57: /* The magic field is filled with this if uname and gname are valid. */
! 58: #define TMAGIC "ustar " /* 7 chars and a null */
! 59:
! 60: /* The linkflag defines the type of file */
! 61: #define LF_OLDNORMAL '\0' /* Normal disk file, Unix compat */
! 62: #define LF_NORMAL '0' /* Normal disk file */
! 63: #define LF_LINK '1' /* Link to previously dumped file */
! 64: #define LF_SYMLINK '2' /* Symbolic link */
! 65: #define LF_CHR '3' /* Character special file */
! 66: #define LF_BLK '4' /* Block special file */
! 67: #define LF_DIR '5' /* Directory */
! 68: #define LF_FIFO '6' /* FIFO special file */
! 69: #define LF_CONTIG '7' /* Contiguous file */
! 70: /* Further link types may be defined later. */
! 71:
! 72: /*
! 73: * Exit codes from the "tar" program
! 74: */
! 75: #define EX_SUCCESS 0 /* success! */
! 76: #define EX_ARGSBAD 1 /* invalid args */
! 77: #define EX_BADFILE 2 /* invalid filename */
! 78: #define EX_BADARCH 3 /* bad archive */
! 79: #define EX_SYSTEM 4 /* system gave unexpected error */
! 80:
! 81:
! 82: /*
! 83: * Global variables
! 84: */
! 85: TAR_EXTERN union record *ar_block; /* Start of block of archive */
! 86: TAR_EXTERN union record *ar_record; /* Current record of archive */
! 87: TAR_EXTERN union record *ar_last; /* Last+1 record of archive block */
! 88: TAR_EXTERN char ar_reading; /* 0 writing, !0 reading archive */
! 89: TAR_EXTERN int blocking; /* Size of each block, in records */
! 90: TAR_EXTERN int blocksize; /* Size of each block, in bytes */
! 91: TAR_EXTERN char *ar_file; /* File containing archive */
! 92: TAR_EXTERN char *name_file; /* File containing names to work on */
! 93: TAR_EXTERN char *tar; /* Name of this program */
! 94:
! 95: /*
! 96: * Flags from the command line
! 97: */
! 98: TAR_EXTERN char f_reblock; /* -B */
! 99: TAR_EXTERN char f_create; /* -c */
! 100: TAR_EXTERN char f_debug; /* -d */
! 101: TAR_EXTERN char f_sayblock; /* -D */
! 102: TAR_EXTERN char f_follow_links; /* -h */
! 103: TAR_EXTERN char f_ignorez; /* -i */
! 104: TAR_EXTERN char f_keep; /* -k */
! 105: TAR_EXTERN char f_modified; /* -m */
! 106: TAR_EXTERN char f_oldarch; /* -o */
! 107: TAR_EXTERN char f_use_protection; /* -p */
! 108: TAR_EXTERN char f_sorted_names; /* -s */
! 109: TAR_EXTERN char f_list; /* -t */
! 110: TAR_EXTERN char f_namefile; /* -T */
! 111: TAR_EXTERN char f_verbose; /* -v */
! 112: TAR_EXTERN char f_extract; /* -x */
! 113: TAR_EXTERN char f_compress; /* -z */
! 114:
! 115: /*
! 116: * We now default to Unix Standard format rather than 4.2BSD tar format.
! 117: * The code can actually produce all three:
! 118: * f_standard ANSI standard
! 119: * f_oldarch V7
! 120: * neither 4.2BSD
! 121: * but we don't bother, since 4.2BSD can read ANSI standard format anyway.
! 122: * The only advantage to the "neither" option is that we can cmp(1) our
! 123: * output to the output of 4.2BSD tar, for debugging.
! 124: */
! 125: #define f_standard (!f_oldarch)
! 126:
! 127: /*
! 128: * Structure for keeping track of filenames and lists thereof.
! 129: */
! 130: struct name {
! 131: struct name *next;
! 132: short length;
! 133: char found;
! 134: char name[NAMSIZ+1];
! 135: };
! 136:
! 137: TAR_EXTERN struct name *namelist; /* Points to first name in list */
! 138: TAR_EXTERN struct name *namelast; /* Points to last name in list */
! 139:
! 140: TAR_EXTERN int archive; /* File descriptor for archive file */
! 141: TAR_EXTERN int errors; /* # of files in error */
! 142:
! 143: /*
! 144: *
! 145: * Due to the next struct declaration, each routine that includes
! 146: * "tar.h" must also include <sys/types.h>. I tried to make it automatic,
! 147: * but System V has no defines in <sys/types.h>, so there is no way of
! 148: * knowing when it has been included. In addition, it cannot be included
! 149: * twice, but must be included exactly once. Argghh!
! 150: *
! 151: * Thanks, typedef. Thanks, USG.
! 152: */
! 153: struct link {
! 154: struct link *next;
! 155: dev_t dev;
! 156: ino_t ino;
! 157: short linkcount;
! 158: char name[NAMSIZ+1];
! 159: };
! 160:
! 161: TAR_EXTERN struct link *linklist; /* Points to first link in list */
! 162:
! 163:
! 164: /*
! 165: * Error recovery stuff
! 166: */
! 167: TAR_EXTERN char read_error_flag;
! 168:
! 169:
! 170: /*
! 171: * Declarations of functions available to the world.
! 172: */
! 173: /*LINTLIBRARY*/
! 174: union record *findrec();
! 175: void userec();
! 176: union record *endofrecs();
! 177: void anno();
! 178: #define annorec(stream, msg) anno(stream, msg, 0) /* Cur rec */
! 179: #define annofile(stream, msg) anno(stream, msg, 1) /* Saved rec */
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