Commit | Line | Data |
---|---|---|
24bb4e19 | 1 | static char *sccsid = "@(#)mv.c 4.5 (Berkeley) 82/02/11"; |
3880b4a9 BJ |
2 | /* |
3 | * mv file1 file2 | |
4 | */ | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <sys/types.h> | |
8 | #include <sys/stat.h> | |
3880b4a9 BJ |
9 | #include <signal.h> |
10 | ||
11 | #define DOT "." | |
12 | #define DOTDOT ".." | |
13 | #define DELIM '/' | |
14 | #define SDELIM "/" | |
15 | #define MAXN 100 | |
16 | #define MODEBITS 07777 | |
17 | #define ROOTINO 2 | |
18 | ||
19 | char *pname(); | |
20 | char *sprintf(); | |
21 | char *dname(); | |
22 | struct stat s1, s2; | |
23 | int iflag = 0; /* interactive flag. If this flag is set, | |
24 | * the user is queried before files are | |
25 | * destroyed by cp. | |
26 | */ | |
27 | int fflag = 0; /* force flag. supercedes all restrictions */ | |
28 | ||
29 | main(argc, argv) | |
30 | register char *argv[]; | |
31 | { | |
32 | register i, r; | |
ca02483b | 33 | register char *arg; |
3880b4a9 BJ |
34 | |
35 | /* get the flag(s) */ | |
36 | ||
37 | if (argc < 2) | |
38 | goto usage; | |
ca02483b | 39 | while (argc>1 && *argv[1] == '-') { |
3880b4a9 | 40 | argc--; |
ca02483b BJ |
41 | arg = *++argv; |
42 | ||
43 | /* | |
44 | * all files following a null option are considered file names | |
45 | */ | |
46 | if (*(arg+1) == '\0') break; | |
47 | ||
48 | while (*++arg != '\0') | |
49 | switch (*arg) { | |
3880b4a9 BJ |
50 | |
51 | /* interactive mode */ | |
52 | case 'i': | |
53 | iflag++; | |
54 | break; | |
55 | ||
56 | /* force moves */ | |
57 | case 'f': | |
58 | fflag++; | |
59 | break; | |
60 | ||
61 | /* don't live with bad options */ | |
62 | default: | |
63 | goto usage; | |
64 | } | |
3880b4a9 BJ |
65 | } |
66 | if (argc < 3) | |
67 | goto usage; | |
68 | if (stat(argv[1], &s1) < 0) { | |
69 | fprintf(stderr, "mv: cannot access %s\n", argv[1]); | |
70 | return(1); | |
71 | } | |
72 | if ((s1.st_mode & S_IFMT) == S_IFDIR) { | |
73 | if (argc != 3) | |
74 | goto usage; | |
75 | return mvdir(argv[1], argv[2]); | |
76 | } | |
77 | setuid(getuid()); | |
78 | if (argc > 3) | |
79 | if (stat(argv[argc-1], &s2) < 0 || (s2.st_mode & S_IFMT) != S_IFDIR) | |
80 | goto usage; | |
81 | r = 0; | |
82 | for (i=1; i<argc-1; i++) | |
83 | r |= move(argv[i], argv[argc-1]); | |
84 | return(r); | |
85 | usage: | |
ca02483b | 86 | fprintf(stderr, "usage: mv [-if] f1 f2; or mv [-if] d1 d2; or mv [-if] f1 ... fn d1\n"); |
3880b4a9 BJ |
87 | return(1); |
88 | } | |
89 | ||
90 | move(source, target) | |
91 | char *source, *target; | |
92 | { | |
93 | register c, i; | |
94 | int status; | |
95 | char buf[MAXN]; | |
96 | ||
97 | if (stat(source, &s1) < 0) { | |
98 | fprintf(stderr, "mv: cannot access %s\n", source); | |
99 | return(1); | |
100 | } | |
101 | if ((s1.st_mode & S_IFMT) == S_IFDIR) { | |
102 | fprintf(stderr, "mv: directory rename only\n"); | |
103 | return(1); | |
104 | } | |
105 | if (stat(target, &s2) >= 0) { | |
106 | if ((s2.st_mode & S_IFMT) == S_IFDIR) { | |
107 | sprintf(buf, "%s/%s", target, dname(source)); | |
108 | target = buf; | |
109 | } | |
110 | if (stat(target, &s2) >= 0) { | |
111 | if ((s2.st_mode & S_IFMT) == S_IFDIR) { | |
112 | fprintf(stderr, "mv: %s is a directory\n", target); | |
113 | return(1); | |
114 | } else if (iflag && !fflag) { | |
115 | fprintf(stderr, "remove %s? ", target); | |
116 | i = c = getchar(); | |
117 | while (c != '\n' && c != EOF) | |
118 | c = getchar(); | |
119 | if (i != 'y') | |
120 | return(1); | |
121 | } | |
122 | if (s1.st_dev==s2.st_dev && s1.st_ino==s2.st_ino) { | |
123 | fprintf(stderr, "mv: %s and %s are identical\n", | |
124 | source, target); | |
125 | return(1); | |
126 | } | |
127 | if (access(target, 2) < 0 && !fflag && isatty(fileno(stdin))) { | |
128 | fprintf(stderr, "override protection %o for %s? ", | |
129 | s2.st_mode & MODEBITS, target); | |
130 | i = c = getchar(); | |
131 | while (c != '\n' && c != EOF) | |
132 | c = getchar(); | |
133 | if (i != 'y') | |
134 | return(1); | |
135 | } | |
136 | if (unlink(target) < 0) { | |
137 | fprintf(stderr, "mv: cannot unlink %s\n", target); | |
138 | return(1); | |
139 | } | |
140 | } | |
141 | } | |
142 | if (link(source, target) < 0) { | |
143 | i = fork(); | |
144 | if (i == -1) { | |
145 | fprintf(stderr, "mv: try again\n"); | |
146 | return(1); | |
147 | } | |
148 | if (i == 0) { | |
149 | execl("/bin/cp", "cp", source, target, 0); | |
150 | fprintf(stderr, "mv: cannot exec cp\n"); | |
151 | exit(1); | |
152 | } | |
153 | while ((c = wait(&status)) != i && c != -1) | |
154 | ; | |
155 | if (status != 0) | |
156 | return(1); | |
157 | utime(target, &s1.st_atime); | |
158 | } | |
159 | if (unlink(source) < 0) { | |
160 | fprintf(stderr, "mv: cannot unlink %s\n", source); | |
161 | return(1); | |
162 | } | |
163 | return(0); | |
164 | } | |
165 | ||
166 | mvdir(source, target) | |
167 | char *source, *target; | |
168 | { | |
169 | register char *p; | |
170 | register i; | |
171 | char buf[MAXN]; | |
172 | char c,cc; | |
173 | ||
174 | if (stat(target, &s2) >= 0) { | |
175 | if ((s2.st_mode&S_IFMT) != S_IFDIR) { | |
176 | fprintf(stderr, "mv: %s exists\n", target); | |
177 | return(1); | |
3880b4a9 | 178 | } |
24bb4e19 KM |
179 | p = dname(source); |
180 | if (strlen(target) > MAXN-strlen(p)-2) { | |
3880b4a9 BJ |
181 | fprintf(stderr, "mv :target name too long\n"); |
182 | return(1); | |
183 | } | |
184 | strcpy(buf, target); | |
185 | target = buf; | |
186 | strcat(buf, SDELIM); | |
24bb4e19 | 187 | strcat(buf, p); |
3880b4a9 BJ |
188 | if (stat(target, &s2) >= 0) { |
189 | fprintf(stderr, "mv: %s exists\n", buf); | |
190 | return(1); | |
191 | } | |
192 | } | |
193 | if (strcmp(source, target) == 0) { | |
194 | fprintf(stderr, "mv: ?? source == target, source exists and target doesnt\n"); | |
195 | return(1); | |
196 | } | |
197 | p = dname(source); | |
198 | if (!strcmp(p, DOT) || !strcmp(p, DOTDOT) || !strcmp(p, "") || p[strlen(p)-1]=='/') { | |
199 | fprintf(stderr, "mv: cannot rename %s\n", p); | |
200 | return(1); | |
201 | } | |
202 | if (stat(pname(source), &s1) < 0 || stat(pname(target), &s2) < 0) { | |
203 | fprintf(stderr, "mv: cannot locate parent\n"); | |
204 | return(1); | |
205 | } | |
206 | if (access(pname(target), 2) < 0) { | |
207 | fprintf(stderr, "mv: no write access to %s\n", pname(target)); | |
208 | return(1); | |
209 | } | |
210 | if (access(pname(source), 2) < 0) { | |
211 | fprintf(stderr, "mv: no write access to %s\n", pname(source)); | |
212 | return(1); | |
213 | } | |
3880b4a9 BJ |
214 | if (s1.st_dev != s2.st_dev) { |
215 | fprintf(stderr, "mv: cannot move directories across devices\n"); | |
216 | return(1); | |
217 | } | |
218 | if (s1.st_ino != s2.st_ino) { | |
219 | char dst[MAXN+5]; | |
220 | ||
221 | if (chkdot(source) || chkdot(target)) { | |
222 | fprintf(stderr, "mv: Sorry, path names including %s aren't allowed\n", DOTDOT); | |
223 | return(1); | |
224 | } | |
225 | stat(source, &s1); | |
226 | if (check(pname(target), s1.st_ino)) | |
227 | return(1); | |
228 | for (i = 1; i <= NSIG; i++) | |
229 | signal(i, SIG_IGN); | |
230 | if (link(source, target) < 0) { | |
231 | fprintf(stderr, "mv: cannot link %s to %s\n", target, source); | |
232 | return(1); | |
233 | } | |
234 | if (unlink(source) < 0) { | |
235 | fprintf(stderr, "mv: %s: cannot unlink\n", source); | |
236 | unlink(target); | |
237 | return(1); | |
238 | } | |
239 | strcat(dst, target); | |
240 | strcat(dst, "/"); | |
241 | strcat(dst, DOTDOT); | |
242 | if (unlink(dst) < 0) { | |
243 | fprintf(stderr, "mv: %s: cannot unlink\n", dst); | |
244 | if (link(target, source) >= 0) | |
245 | unlink(target); | |
246 | return(1); | |
247 | } | |
248 | if (link(pname(target), dst) < 0) { | |
249 | fprintf(stderr, "mv: cannot link %s to %s\n", | |
250 | dst, pname(target)); | |
251 | if (link(pname(source), dst) >= 0) | |
252 | if (link(target, source) >= 0) | |
253 | unlink(target); | |
254 | return(1); | |
255 | } | |
256 | return(0); | |
257 | } | |
258 | if (link(source, target) < 0) { | |
259 | fprintf(stderr, "mv: cannot link %s and %s\n", | |
260 | source, target); | |
261 | return(1); | |
262 | } | |
263 | if (unlink(source) < 0) { | |
264 | fprintf(stderr, "mv: ?? cannot unlink %s\n", source); | |
265 | return(1); | |
266 | } | |
267 | return(0); | |
268 | } | |
269 | ||
270 | char * | |
271 | pname(name) | |
272 | register char *name; | |
273 | { | |
274 | register c; | |
275 | register char *p, *q; | |
276 | static char buf[MAXN]; | |
277 | ||
278 | p = q = buf; | |
279 | while (c = *p++ = *name++) | |
280 | if (c == DELIM) | |
281 | q = p-1; | |
282 | if (q == buf && *q == DELIM) | |
283 | q++; | |
284 | *q = 0; | |
285 | return buf[0]? buf : DOT; | |
286 | } | |
287 | ||
288 | char * | |
289 | dname(name) | |
290 | register char *name; | |
291 | { | |
292 | register char *p; | |
293 | ||
294 | p = name; | |
295 | while (*p) | |
296 | if (*p++ == DELIM && *p) | |
297 | name = p; | |
298 | return name; | |
299 | } | |
300 | ||
301 | check(spth, dinode) | |
302 | char *spth; | |
303 | ino_t dinode; | |
304 | { | |
305 | char nspth[MAXN]; | |
306 | struct stat sbuf; | |
307 | ||
308 | sbuf.st_ino = 0; | |
309 | ||
310 | strcpy(nspth, spth); | |
311 | while (sbuf.st_ino != ROOTINO) { | |
312 | if (stat(nspth, &sbuf) < 0) { | |
313 | fprintf(stderr, "mv: cannot access %s\n", nspth); | |
314 | return(1); | |
315 | } | |
316 | if (sbuf.st_ino == dinode) { | |
317 | fprintf(stderr, "mv: cannot move a directory into itself\n"); | |
318 | return(1); | |
319 | } | |
320 | if (strlen(nspth) > MAXN-2-sizeof(DOTDOT)) { | |
321 | fprintf(stderr, "mv: name too long\n"); | |
322 | return(1); | |
323 | } | |
324 | strcat(nspth, SDELIM); | |
325 | strcat(nspth, DOTDOT); | |
326 | } | |
327 | return(0); | |
328 | } | |
329 | ||
330 | chkdot(s) | |
331 | register char *s; | |
332 | { | |
333 | do { | |
334 | if (strcmp(dname(s), DOTDOT) == 0) | |
335 | return(1); | |
336 | s = pname(s); | |
337 | } while (strcmp(s, DOT) != 0 && strcmp(s, SDELIM) != 0); | |
338 | return(0); | |
339 | } |