Annotation of src/usr.bin/file/tar.h, Revision 1.1.1.1
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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