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15637ed4 RG |
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. | |
286a6f32 C |
7 | * |
8 | * tar.h,v 1.2 1993/06/10 00:38:20 jtc Exp # checkin only | |
15637ed4 RG |
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 */ |