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1 | /* Copyright (c) 1983 Regents of the University of California */ |
2 | ||
3 | #ifndef lint | |
d4ca0635 | 4 | static char sccsid[] = "@(#)utilities.c 3.8 (Berkeley) 83/03/27"; |
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5 | #endif |
6 | ||
7 | #include "restore.h" | |
8 | ||
9 | /* | |
10 | * Insure that all the components of a pathname exist. | |
11 | */ | |
16e2b8d5 | 12 | pathcheck(name) |
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13 | char *name; |
14 | { | |
15 | register char *cp; | |
16 | struct entry *ep; | |
9f13f26d | 17 | char *start; |
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18 | |
19 | start = index(name, '/'); | |
9f13f26d | 20 | if (start == 0) |
16e2b8d5 | 21 | return; |
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22 | for (cp = start; *cp != '\0'; cp++) { |
23 | if (*cp != '/') | |
24 | continue; | |
25 | *cp = '\0'; | |
26 | ep = lookupname(name); | |
27 | if (ep == NIL) { | |
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28 | ep = addentry(name, ep->e_ino, NODE); |
29 | ep->e_flags |= KEEP; | |
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30 | newnode(ep); |
31 | } | |
32 | *cp = '/'; | |
33 | } | |
34 | } | |
35 | ||
36 | /* | |
37 | * Change a name to a unique temporary name. | |
38 | */ | |
39 | mktempname(ep) | |
40 | register struct entry *ep; | |
41 | { | |
16e2b8d5 | 42 | char oldname[MAXPATHLEN]; |
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43 | |
44 | if (ep->e_flags & TMPNAME) | |
45 | badentry(ep, "mktempname: called with TMPNAME"); | |
46 | ep->e_flags |= TMPNAME; | |
47 | strcpy(oldname, myname(ep)); | |
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48 | freename(ep->e_name); |
49 | ep->e_name = savename(gentempname(ep)); | |
50 | ep->e_namlen = strlen(ep->e_name); | |
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51 | renameit(oldname, myname(ep)); |
52 | } | |
53 | ||
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54 | /* |
55 | * Generate a temporary name for an entry. | |
56 | */ | |
57 | char * | |
58 | gentempname(ep) | |
59 | struct entry *ep; | |
60 | { | |
61 | static char name[MAXPATHLEN]; | |
62 | struct entry *np; | |
63 | long i = 0; | |
64 | ||
65 | for (np = lookupino(ep->e_ino); np != NIL && np != ep; np = np->e_links) | |
66 | i++; | |
67 | if (np == NIL) | |
68 | badentry(ep, "not on ino list"); | |
e9a184e3 | 69 | (void) sprintf(name, "%s%d%d", TMPHDR, i, ep->e_ino); |
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70 | return (name); |
71 | } | |
72 | ||
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73 | /* |
74 | * Rename a file or directory. | |
75 | */ | |
76 | renameit(from, to) | |
77 | char *from, *to; | |
78 | { | |
79 | if (rename(from, to) < 0) { | |
80 | perror("renameit"); | |
81 | panic("Cannot rename %s to %s\n", from, to); | |
82 | } | |
83 | vprintf(stdout, "rename %s to %s\n", from, to); | |
84 | } | |
85 | ||
86 | /* | |
87 | * Create a new node (directory). | |
88 | */ | |
89 | newnode(np) | |
90 | struct entry *np; | |
91 | { | |
92 | char *cp; | |
93 | ||
94 | if (np->e_type != NODE) | |
95 | badentry(np, "newnode: not a node"); | |
96 | cp = myname(np); | |
9f13f26d | 97 | if (mkdir(cp, 0777) < 0) { |
d4ca0635 KM |
98 | fprintf(stderr, "Warning: "); |
99 | fflush(stderr); | |
100 | perror(cp); | |
101 | return; | |
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102 | } |
103 | vprintf(stdout, "Make node %s\n", cp); | |
104 | } | |
105 | ||
106 | /* | |
107 | * Remove an old node (directory). | |
108 | */ | |
109 | removenode(ep) | |
110 | register struct entry *ep; | |
111 | { | |
112 | char *cp; | |
113 | ||
114 | if (ep->e_type != NODE) | |
115 | badentry(ep, "removenode: not a node"); | |
116 | if (ep->e_entries != NIL) | |
117 | badentry(ep, "removenode: non-empty directory"); | |
118 | cp = myname(ep); | |
119 | if (rmdir(cp) < 0) { | |
120 | perror("removenode"); | |
121 | panic("Cannot remove node %s\n", cp); | |
122 | } | |
123 | ep->e_flags |= REMOVED; | |
16e2b8d5 | 124 | ep->e_flags &= ~TMPNAME; |
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125 | vprintf(stdout, "Remove node %s\n", cp); |
126 | } | |
127 | ||
128 | /* | |
129 | * Remove a leaf. | |
130 | */ | |
131 | removeleaf(ep) | |
132 | register struct entry *ep; | |
133 | { | |
134 | char *cp; | |
135 | ||
136 | if (ep->e_type != LEAF) | |
137 | badentry(ep, "removeleaf: not a leaf"); | |
138 | cp = myname(ep); | |
139 | if (unlink(cp) < 0) { | |
140 | perror("removeleaf"); | |
141 | panic("Cannot remove leaf %s\n", cp); | |
142 | } | |
143 | ep->e_flags |= REMOVED; | |
144 | ep->e_flags &= ~TMPNAME; | |
145 | vprintf(stdout, "Remove leaf %s\n", cp); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Create a link. | |
150 | */ | |
151 | linkit(existing, new, type) | |
152 | char *existing, *new; | |
153 | int type; | |
154 | { | |
155 | ||
156 | if (type == SYMLINK) { | |
157 | if (symlink(existing, new) < 0) { | |
158 | perror("linkit"); | |
159 | panic("Cannot create symbolic link %s->%s\n", | |
160 | new, existing); | |
161 | } | |
162 | } else if (type == HARDLINK) { | |
163 | if (link(existing, new) < 0) { | |
164 | perror("linkit"); | |
165 | panic("Cannot create hard link %s->%s\n", | |
166 | new, existing); | |
167 | } | |
168 | } else { | |
169 | panic("linkit: unknown type %d\n", type); | |
170 | } | |
171 | vprintf(stdout, "Create %s link %s->%s\n", | |
172 | type == SYMLINK ? "symbolic" : "hard", new, existing); | |
173 | } | |
174 | ||
175 | /* | |
176 | * find lowest number file (above "start") that needs to be extracted | |
177 | */ | |
178 | ino_t | |
179 | lowerbnd(start) | |
180 | ino_t start; | |
181 | { | |
182 | register struct entry *ep; | |
183 | ||
184 | for ( ; start < maxino; start++) { | |
185 | ep = lookupino(start); | |
186 | if (ep == NIL) | |
187 | continue; | |
16e2b8d5 | 188 | if (ep->e_flags & (NEW|EXTRACT)) |
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189 | return (start); |
190 | } | |
191 | return (start); | |
192 | } | |
193 | ||
194 | /* | |
195 | * find highest number file (below "start") that needs to be extracted | |
196 | */ | |
197 | ino_t | |
198 | upperbnd(start) | |
199 | ino_t start; | |
200 | { | |
201 | register struct entry *ep; | |
202 | ||
203 | for ( ; start > ROOTINO; start--) { | |
204 | ep = lookupino(start); | |
205 | if (ep == NIL) | |
206 | continue; | |
16e2b8d5 | 207 | if (ep->e_flags & (NEW|EXTRACT)) |
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208 | return (start); |
209 | } | |
210 | return (start); | |
211 | } | |
212 | ||
213 | /* | |
214 | * report on a badly formed entry | |
215 | */ | |
216 | badentry(ep, msg) | |
217 | register struct entry *ep; | |
218 | char *msg; | |
219 | { | |
220 | char flagbuf[BUFSIZ]; | |
221 | ||
222 | fprintf(stderr, "bad entry: %s\n", msg); | |
223 | fprintf(stderr, "name: %s\n", myname(ep)); | |
224 | fprintf(stderr, "parent name %s\n", myname(ep->e_parent)); | |
225 | if (ep->e_sibling != NIL) | |
226 | fprintf(stderr, "sibling name: %s\n", myname(ep->e_sibling)); | |
227 | if (ep->e_entries != NIL) | |
228 | fprintf(stderr, "next entry name: %s\n", myname(ep->e_entries)); | |
229 | if (ep->e_links != NIL) | |
230 | fprintf(stderr, "next link name: %s\n", myname(ep->e_links)); | |
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231 | if (ep->e_next != NIL) |
232 | fprintf(stderr, "next hashchain name: %s\n", myname(ep->e_next)); | |
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233 | fprintf(stderr, "entry type: %s\n", |
234 | ep->e_type == NODE ? "NODE" : "LEAF"); | |
235 | fprintf(stderr, "inode number: %ld\n", ep->e_ino); | |
236 | strcpy(flagbuf, "|NIL"); | |
237 | flagbuf[0] = '\0'; | |
238 | if (ep->e_flags & REMOVED) | |
239 | strcat(flagbuf, "|REMOVED"); | |
240 | if (ep->e_flags & TMPNAME) | |
241 | strcat(flagbuf, "|TMPNAME"); | |
242 | if (ep->e_flags & EXTRACT) | |
243 | strcat(flagbuf, "|EXTRACT"); | |
244 | if (ep->e_flags & NEW) | |
245 | strcat(flagbuf, "|NEW"); | |
246 | if (ep->e_flags & KEEP) | |
247 | strcat(flagbuf, "|KEEP"); | |
248 | panic("flags: %s\n", &flagbuf[1]); | |
249 | } | |
250 | ||
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251 | /* |
252 | * canonicalize file names to always start with ``./'' | |
253 | */ | |
254 | canon(rawname, canonname) | |
255 | char *rawname, *canonname; | |
256 | { | |
257 | int len; | |
258 | ||
259 | if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) | |
16e2b8d5 | 260 | (void) strcpy(canonname, ""); |
38bbfe41 | 261 | else if (rawname[0] == '/') |
16e2b8d5 | 262 | (void) strcpy(canonname, "."); |
38bbfe41 | 263 | else |
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264 | (void) strcpy(canonname, "./"); |
265 | (void) strcat(canonname, rawname); | |
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266 | len = strlen(canonname) - 1; |
267 | if (canonname[len] == '/') | |
268 | canonname[len] = '\0'; | |
269 | } | |
270 | ||
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271 | /* |
272 | * elicit a reply | |
273 | */ | |
274 | reply(question) | |
275 | char *question; | |
276 | { | |
277 | char c; | |
278 | ||
279 | fprintf(stderr, "%s? ", question); | |
280 | do { | |
281 | fprintf(stderr, "[yn] "); | |
282 | c = getchar(); | |
283 | while (c != '\n' && getchar() != '\n') | |
284 | /* void */; | |
285 | } while (c != 'y' && c != 'n'); | |
286 | if (c == 'y') | |
287 | return (GOOD); | |
288 | return (FAIL); | |
289 | } |