1 /* Copyright 2008 Rob Landley <rob@landley.net>
3 * See http://opengroup.org/onlinepubs/9699919799/utilities/cp.html
5 * Posix says "cp -Rf dir file" shouldn't delete file, but our -f does.
7 // This is subtle: MV options shared with CP must be in same order (right to
8 // left) as CP for FLAG_X macros to work out right.
10 USE_CP(NEWTOY(cp, "<2RHLPp"USE_CP_MORE("rdaslvnF(remove-destination)")"fi[-HLP"USE_CP_MORE("d")"]"USE_CP_MORE("[-ni]"), TOYFLAG_BIN))
11 USE_MV(NEWTOY(mv, "<2"USE_CP_MORE("vnF")"fi"USE_CP_MORE("[-ni]"), TOYFLAG_BIN))
12 USE_INSTALL(NEWTOY(install, "<1cdDpsvm:o:g:", TOYFLAG_USR|TOYFLAG_BIN))
19 usage: cp [-fipRHLP] SOURCE... DEST
21 Copy files from SOURCE to DEST. If more than one SOURCE, DEST must
24 -f delete destination files we can't write to
25 -F delete any existing destination file first (--remove-destination)
26 -i interactive, prompt before overwriting existing DEST
27 -p preserve timestamps, ownership, and permissions
28 -R recurse into subdirectories (DEST must be a directory)
29 -H Follow symlinks listed on command line
30 -L Follow all symlinks
31 -P Do not follow symlinks [default]
34 bool "cp -adlnrsv options"
41 -d don't dereference symlinks
42 -l hard link instead of copy
43 -n no clobber (don't overwrite DEST)
45 -s symlink instead of copy
53 usage: mv [-fi] SOURCE... DEST"
55 -f force copy by deleting destination file
56 -i interactive, prompt before overwriting existing DEST
61 depends on MV && CP_MORE
66 -n no clobber (don't overwrite DEST)
71 depends on CP && CP_MORE
73 usage: install [-dDpsv] [-o USER] [-g GROUP] [-m MODE] [SOURCE...] DEST
75 Copy files and set attributes.
78 -D Create leading directories for DEST
79 -g Make copy belong to GROUP
80 -m Set permissions to MODE
81 -o Make copy belong to USER
82 -p Preserve timestamps
98 int (*callback)(struct dirtree *try);
103 // Callback from dirtree_read() for each file/directory under a source dir.
105 int cp_node(struct dirtree *try)
107 int fdout = -1, cfd = try->parent ? try->parent->extra : AT_FDCWD,
108 tfd = dirtree_parentfd(try);
109 unsigned flags = toys.optflags;
110 char *catch = try->parent ? try->name : TT.destname, *err = "%s";
113 if (!dirtree_notdotdot(try)) return 0;
115 // If returning from COMEAGAIN, jump straight to -p logic at end.
116 if (S_ISDIR(try->st.st_mode) && try->again) {
121 // -d is only the same as -r for symlinks, not for directories
122 if (S_ISLNK(try->st.st_mode) && (flags & FLAG_d)) flags |= FLAG_r;
124 // Detect recursive copies via repeated top node (cp -R .. .) or
125 // identical source/target (fun with hardlinks).
126 if ((TT.top.st_dev == try->st.st_dev && TT.top.st_ino == try->st.st_ino
127 && (catch = TT.destname))
128 || (!fstatat(cfd, catch, &cst, 0) && cst.st_dev == try->st.st_dev
129 && cst.st_ino == try->st.st_ino))
131 error_msg("'%s' is '%s'", catch, err = dirtree_path(try, 0));
139 if (!faccessat(cfd, catch, F_OK, 0) && !S_ISDIR(cst.st_mode)) {
142 if (S_ISDIR(try->st.st_dev)) {
143 error_msg("dir at '%s'", s = dirtree_path(try, 0));
146 } else if ((flags & FLAG_F) && unlinkat(cfd, catch, 0)) {
147 error_msg("unlink '%s'", catch);
149 } else if (flags & FLAG_n) return 0;
150 else if (flags & FLAG_i) {
151 fprintf(stderr, "%s: overwrite '%s'", toys.which->name,
152 s = dirtree_path(try, 0));
154 if (!yesno("", 1)) return 0;
158 if (flags & FLAG_v) {
159 char *s = dirtree_path(try, 0);
160 printf("%s '%s'\n", toys.which->name, s);
164 // Loop for -f retry after unlink
167 // directory, hardlink, symlink, mknod (char, block, fifo, socket), file
171 if (S_ISDIR(try->st.st_mode)) {
174 if (!(flags & (FLAG_a|FLAG_r|FLAG_R))) {
175 err = "Skipped dir '%s'";
180 // Always make directory writeable to us, so we can create files in it.
182 // Yes, there's a race window between mkdir() and open() so it's
183 // possible that -p can be made to chown a directory other than the one
184 // we created. The closest we can do to closing this is make sure
185 // that what we open _is_ a directory rather than something else.
187 if (!mkdirat(cfd, catch, try->st.st_mode | 0200) || errno == EEXIST)
188 if (-1 != (try->extra = openat(cfd, catch, O_NOFOLLOW)))
189 if (!fstat(try->extra, &st2) && S_ISDIR(st2.st_mode))
190 return DIRTREE_COMEAGAIN
191 | (DIRTREE_SYMFOLLOW*!!(toys.optflags&FLAG_L));
195 } else if (flags & FLAG_l) {
196 if (!linkat(tfd, try->name, cfd, catch, 0)) err = 0;
198 // Copy tree as symlinks. For non-absolute paths this involves
199 // appending the right number of .. entries as you go down the tree.
201 } else if (flags & FLAG_s) {
206 s = dirtree_path(try, 0);
207 for (or = try; or->parent; or = or->parent) dotdots++;
209 if (*or->name == '/') dotdots = 0;
211 char *s2 = xmprintf("%*c%s", 3*dotdots, ' ', s);
215 memcpy(s2, "../", 3);
219 if (!symlinkat(s, cfd, catch)) {
225 // Do something _other_ than copy contents of a file?
226 } else if (!S_ISREG(try->st.st_mode)
227 && (try->parent || (flags & (FLAG_a|FLAG_r))))
231 // make symlink, or make block/char/fifo/socket
232 if (S_ISLNK(try->st.st_mode)
233 ? (0 < (i = readlinkat(tfd, try->name, toybuf, sizeof(toybuf))) &&
234 sizeof(toybuf) > i && !symlinkat(toybuf, cfd, catch))
235 : !mknodat(cfd, catch, try->st.st_mode, try->st.st_rdev))
241 // Copy contents of file.
245 fdin = openat(tfd, try->name, O_RDONLY);
250 fdout = openat(cfd, catch, O_RDWR|O_CREAT|O_TRUNC, try->st.st_mode);
252 xsendfile(fdin, fdout);
258 } while (err && (flags & (FLAG_f|FLAG_n)) && !unlinkat(cfd, catch, 0));
262 if (flags & (FLAG_a|FLAG_p)) {
263 struct timespec times[2];
266 // Inability to set these isn't fatal, some require root access.
268 times[0] = try->st.st_atim;
269 times[1] = try->st.st_mtim;
271 // If we can't get a filehandle to the actual object, use racy functions
272 if (fdout == AT_FDCWD)
273 rc = fchownat(cfd, catch, try->st.st_uid, try->st.st_gid,
274 AT_SYMLINK_NOFOLLOW);
275 else rc = fchown(fdout, try->st.st_uid, try->st.st_gid);
279 perror_msg("chown '%s'", pp = dirtree_path(try, 0));
283 // permission bits already correct for mknod and don't apply to symlink
284 if (fdout == AT_FDCWD) utimensat(cfd, catch, times, AT_SYMLINK_NOFOLLOW);
286 futimens(fdout, times);
287 fchmod(fdout, try->st.st_mode);
291 if (fdout != AT_FDCWD) xclose(fdout);
293 if (CFG_MV && toys.which->name[0] == 'm')
294 if (unlinkat(tfd, try->name, S_ISDIR(try->st.st_mode) ? AT_REMOVEDIR :0))
298 if (err) perror_msg(err, catch);
304 char *destname = toys.optargs[--toys.optc];
305 int i, destdir = !stat(destname, &TT.top) && S_ISDIR(TT.top.st_mode);
307 if (toys.optc>1 && !destdir) error_exit("'%s' not directory", destname);
308 if (toys.which->name[0] == 'm') toys.optflags |= FLAG_d|FLAG_p|FLAG_R;
309 if (toys.optflags & (FLAG_a|FLAG_p)) umask(0);
311 if (!TT.callback) TT.callback = cp_node;
313 // Loop through sources
315 for (i=0; i<toys.optc; i++) {
317 char *src = toys.optargs[i];
320 if (destdir) TT.destname = xmprintf("%s/%s", destname, basename(src));
321 else TT.destname = destname;
324 if (CFG_MV && toys.which->name[0] == 'm') {
325 if (!(toys.optflags & FLAG_f)) {
328 // Technically "is writeable" is more complicated (022 is not writeable
329 // by the owner, just everybody _else_) but I don't care.
330 if (!stat(TT.destname, &st)
331 && ((toys.optflags & FLAG_i) || !(st.st_mode & 0222)))
333 fprintf(stderr, "%s: overwrite '%s'", toys.which->name, TT.destname);
334 if (!yesno("", 1)) rc = 0;
339 if (rc) rc = rename(src, TT.destname);
342 // Skip nonexistent sources
344 int symfollow = toys.optflags & (FLAG_H|FLAG_L);
346 if (errno != EXDEV || !(new = dirtree_add_node(0, src, symfollow)))
347 perror_msg("bad '%s'", src);
348 else dirtree_handle_callback(new, TT.callback);
350 if (destdir) free(TT.destname);
361 #include <generated/flags.h>
363 static int install_node(struct dirtree *try)
365 if (TT.mode) try->st.st_mode = string_to_mode(TT.mode, try->st.st_mode);
366 if (TT.group) try->st.st_gid = TT.gid;
367 if (TT.user) try->st.st_uid = TT.uid;
369 // Always returns 0 because no -r
372 // No -r so always one level deep, so destname as set by cp_node() is correct
373 if (toys.optflags & FLAG_s)
374 if (xrun((char *[]){"strip", "-p", TT.destname, 0})) toys.exitval = 1;
379 void install_main(void)
382 int flags = toys.optflags;
384 if (flags & FLAG_d) {
385 for (ss = toys.optargs; *ss; ss++) {
386 if (mkpathat(AT_FDCWD, *ss, 0777, 3)) perror_msg("%s", *ss);
387 if (flags & FLAG_v) printf("%s\n", *ss);
393 if (toys.optflags & FLAG_D) {
394 if (mkpathat(AT_FDCWD, TT.destname, 0, 2))
395 perror_exit("-D '%s'", TT.destname);
396 if (toys.optc == 1) return;
398 if (toys.optc < 2) error_exit("needs 2 args");
400 // Translate flags from install to cp
401 toys.optflags = 4; // Force cp's FLAG_F
402 if (flags & FLAG_v) toys.optflags |= 8; // cp's FLAG_v
403 if (flags & (FLAG_p|FLAG_o|FLAG_g)) toys.optflags |= 512; // cp's FLAG_p
405 if (TT.user) TT.uid = xgetpwnamid(TT.user)->pw_uid;
406 if (TT.group) TT.gid = xgetgrnamid(TT.group)->gr_gid;
408 TT.callback = install_node;