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 // options shared between mv/cp must be in same order (right to left)
8 // for FLAG macros to work out right in shared infrastructure.
10 USE_CP(NEWTOY(cp, "<2"USE_CP_PRESERVE("(preserve):;")"RHLPp"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))
18 usage: cp [-fipRHLP] SOURCE... DEST
20 Copy files from SOURCE to DEST. If more than one SOURCE, DEST must
23 -f delete destination files we can't write to
24 -F delete any existing destination file first (--remove-destination)
25 -i interactive, prompt before overwriting existing DEST
26 -p preserve timestamps, ownership, and permissions
27 -R recurse into subdirectories (DEST must be a directory)
28 -H Follow symlinks listed on command line
29 -L Follow all symlinks
30 -P Do not follow symlinks [default]
33 bool "cp -adlnrsv options"
40 -d don't dereference symlinks
41 -l hard link instead of copy
42 -n no clobber (don't overwrite DEST)
44 -s symlink instead of copy
48 bool "cp --preserve support"
52 usage: cp [--preserve=mota]
54 --preserve takes either a comma separated list of attributes, or the first
57 mode - permissions (ignore umask for rwx, copy suid and sticky bit)
58 ownership - user and group
59 timestamps - file creation, modification, and access times.
60 all - all of the above
67 usage: mv [-fi] SOURCE... DEST"
69 -f force copy by deleting destination file
70 -i interactive, prompt before overwriting existing DEST
75 depends on MV && CP_MORE
80 -n no clobber (don't overwrite DEST)
85 depends on CP && CP_MORE
87 usage: install [-dDpsv] [-o USER] [-g GROUP] [-m MODE] [SOURCE...] DEST
89 Copy files and set attributes.
92 -D Create leading directories for DEST
93 -g Make copy belong to GROUP
94 -m Set permissions to MODE
95 -o Make copy belong to USER
96 -p Preserve timestamps
119 int (*callback)(struct dirtree *try);
125 // Callback from dirtree_read() for each file/directory under a source dir.
127 int cp_node(struct dirtree *try)
129 int fdout = -1, cfd = try->parent ? try->parent->extra : AT_FDCWD,
130 tfd = dirtree_parentfd(try);
131 unsigned flags = toys.optflags;
132 char *catch = try->parent ? try->name : TT.destname, *err = "%s";
135 if (!dirtree_notdotdot(try)) return 0;
137 // If returning from COMEAGAIN, jump straight to -p logic at end.
138 if (S_ISDIR(try->st.st_mode) && try->again) {
143 // -d is only the same as -r for symlinks, not for directories
144 if (S_ISLNK(try->st.st_mode) && (flags & FLAG_d)) flags |= FLAG_r;
146 // Detect recursive copies via repeated top node (cp -R .. .) or
147 // identical source/target (fun with hardlinks).
148 if ((TT.top.st_dev == try->st.st_dev && TT.top.st_ino == try->st.st_ino
149 && (catch = TT.destname))
150 || (!fstatat(cfd, catch, &cst, 0) && cst.st_dev == try->st.st_dev
151 && cst.st_ino == try->st.st_ino))
153 error_msg("'%s' is '%s'", catch, err = dirtree_path(try, 0));
161 if (!faccessat(cfd, catch, F_OK, 0) && !S_ISDIR(cst.st_mode)) {
164 if (S_ISDIR(try->st.st_dev)) {
165 error_msg("dir at '%s'", s = dirtree_path(try, 0));
168 } else if ((flags & FLAG_F) && unlinkat(cfd, catch, 0)) {
169 error_msg("unlink '%s'", catch);
171 } else if (flags & FLAG_n) return 0;
172 else if (flags & FLAG_i) {
173 fprintf(stderr, "%s: overwrite '%s'", toys.which->name,
174 s = dirtree_path(try, 0));
176 if (!yesno("", 1)) return 0;
180 if (flags & FLAG_v) {
181 char *s = dirtree_path(try, 0);
182 printf("%s '%s'\n", toys.which->name, s);
186 // Loop for -f retry after unlink
189 // directory, hardlink, symlink, mknod (char, block, fifo, socket), file
193 if (S_ISDIR(try->st.st_mode)) {
196 if (!(flags & (FLAG_a|FLAG_r|FLAG_R))) {
197 err = "Skipped dir '%s'";
202 // Always make directory writeable to us, so we can create files in it.
204 // Yes, there's a race window between mkdir() and open() so it's
205 // possible that -p can be made to chown a directory other than the one
206 // we created. The closest we can do to closing this is make sure
207 // that what we open _is_ a directory rather than something else.
209 if (!mkdirat(cfd, catch, try->st.st_mode | 0200) || errno == EEXIST)
210 if (-1 != (try->extra = openat(cfd, catch, O_NOFOLLOW)))
211 if (!fstat(try->extra, &st2) && S_ISDIR(st2.st_mode))
212 return DIRTREE_COMEAGAIN
213 | (DIRTREE_SYMFOLLOW*!!(toys.optflags&FLAG_L));
217 } else if (flags & FLAG_l) {
218 if (!linkat(tfd, try->name, cfd, catch, 0)) err = 0;
220 // Copy tree as symlinks. For non-absolute paths this involves
221 // appending the right number of .. entries as you go down the tree.
223 } else if (flags & FLAG_s) {
228 s = dirtree_path(try, 0);
229 for (or = try; or->parent; or = or->parent) dotdots++;
231 if (*or->name == '/') dotdots = 0;
233 char *s2 = xmprintf("%*c%s", 3*dotdots, ' ', s);
237 memcpy(s2, "../", 3);
241 if (!symlinkat(s, cfd, catch)) {
247 // Do something _other_ than copy contents of a file?
248 } else if (!S_ISREG(try->st.st_mode)
249 && (try->parent || (flags & (FLAG_a|FLAG_r))))
253 // make symlink, or make block/char/fifo/socket
254 if (S_ISLNK(try->st.st_mode)
255 ? (0 < (i = readlinkat(tfd, try->name, toybuf, sizeof(toybuf))) &&
256 sizeof(toybuf) > i && !symlinkat(toybuf, cfd, catch))
257 : !mknodat(cfd, catch, try->st.st_mode, try->st.st_rdev))
263 // Copy contents of file.
267 fdin = openat(tfd, try->name, O_RDONLY);
272 fdout = openat(cfd, catch, O_RDWR|O_CREAT|O_TRUNC, try->st.st_mode);
274 xsendfile(fdin, fdout);
279 } while (err && (flags & (FLAG_f|FLAG_n)) && !unlinkat(cfd, catch, 0));
282 // Did we make a thing?
286 // Inability to set --preserve isn't fatal, some require root access.
291 // permission bits already correct for mknod and don't apply to symlink
292 // If we can't get a filehandle to the actual object, use racy functions
293 if (fdout == AT_FDCWD)
294 rc = fchownat(cfd, catch, try->st.st_uid, try->st.st_gid,
295 AT_SYMLINK_NOFOLLOW);
296 else rc = fchown(fdout, try->st.st_uid, try->st.st_gid);
300 perror_msg("chown '%s'", pp = dirtree_path(try, 0));
307 struct timespec times[] = {try->st.st_atim, try->st.st_mtim};
309 if (fdout == AT_FDCWD) utimensat(cfd, catch, times, AT_SYMLINK_NOFOLLOW);
310 else futimens(fdout, times);
313 // mode comes last because other syscalls can strip suid bit
314 if (fdout != AT_FDCWD) {
315 if (TT.pflags & 1) fchmod(fdout, try->st.st_mode);
319 if (CFG_MV && toys.which->name[0] == 'm')
320 if (unlinkat(tfd, try->name, S_ISDIR(try->st.st_mode) ? AT_REMOVEDIR :0))
324 if (err) perror_msg(err, catch);
330 char *destname = toys.optargs[--toys.optc],
331 *preserve[] = {"mode", "ownership", "timestamps"};
332 int i, destdir = !stat(destname, &TT.top) && S_ISDIR(TT.top.st_mode);
334 if (toys.optc>1 && !destdir) error_exit("'%s' not directory", destname);
336 if (toys.optflags & (FLAG_a|FLAG_p)) {
337 TT.pflags = 7; // preserve=mot
340 if (CFG_CP_PRESERVE && TT.c.preserve) {
341 char *pre = xstrdup(TT.c.preserve), *s;
343 if (comma_scan(pre, "all", 1)) TT.pflags = ~0;
344 for (i=0; i<ARRAY_LEN(preserve); i++)
345 if (comma_scan(pre, preserve[i], 1)) TT.pflags |= 1<<i;
348 // Try to interpret as letters, commas won't set anything this doesn't.
349 for (s = TT.c.preserve; *s; s++) {
350 for (i=0; i<ARRAY_LEN(preserve); i++)
351 if (*s == *preserve[i]) TT.pflags |= 1<<i;
352 if (i == ARRAY_LEN(preserve)) {
353 if (*s == 'a') TT.pflags = ~0;
358 if (*s) error_exit("bad --preserve=%s", pre);
362 if (!TT.callback) TT.callback = cp_node;
364 // Loop through sources
365 for (i=0; i<toys.optc; i++) {
367 char *src = toys.optargs[i];
370 if (destdir) TT.destname = xmprintf("%s/%s", destname, basename(src));
371 else TT.destname = destname;
374 if (CFG_MV && toys.which->name[0] == 'm') {
375 if (!(toys.optflags & FLAG_f)) {
378 // Technically "is writeable" is more complicated (022 is not writeable
379 // by the owner, just everybody _else_) but I don't care.
380 if (!stat(TT.destname, &st)
381 && ((toys.optflags & FLAG_i) || !(st.st_mode & 0222)))
383 fprintf(stderr, "%s: overwrite '%s'", toys.which->name, TT.destname);
384 if (!yesno("", 1)) rc = 0;
389 if (rc) rc = rename(src, TT.destname);
392 // Skip nonexistent sources
395 !(new = dirtree_start(src, toys.optflags&(FLAG_H|FLAG_L))))
396 perror_msg("bad '%s'", src);
397 else dirtree_handle_callback(new, TT.callback);
399 if (destdir) free(TT.destname);
405 toys.optflags |= FLAG_d|FLAG_p|FLAG_R;
412 #include <generated/flags.h>
414 static int install_node(struct dirtree *try)
416 if (TT.i.mode) try->st.st_mode = string_to_mode(TT.i.mode, try->st.st_mode);
417 if (TT.i.group) try->st.st_gid = TT.gid;
418 if (TT.i.user) try->st.st_uid = TT.uid;
420 // Always returns 0 because no -r
423 // No -r so always one level deep, so destname as set by cp_node() is correct
424 if (toys.optflags & FLAG_s)
425 if (xrun((char *[]){"strip", "-p", TT.destname, 0})) toys.exitval = 1;
430 void install_main(void)
433 int flags = toys.optflags;
435 if (flags & FLAG_d) {
436 for (ss = toys.optargs; *ss; ss++) {
437 if (mkpathat(AT_FDCWD, *ss, 0777, 3)) perror_msg("%s", *ss);
438 if (flags & FLAG_v) printf("%s\n", *ss);
444 if (toys.optflags & FLAG_D) {
445 TT.destname = toys.optargs[toys.optc-1];
446 if (mkpathat(AT_FDCWD, TT.destname, 0, 2))
447 perror_exit("-D '%s'", TT.destname);
448 if (toys.optc == 1) return;
450 if (toys.optc < 2) error_exit("needs 2 args");
452 // Translate flags from install to cp
453 toys.optflags = 4; // Force cp's FLAG_F
454 if (flags & FLAG_v) toys.optflags |= 8; // cp's FLAG_v
455 if (flags & (FLAG_p|FLAG_o|FLAG_g)) toys.optflags |= 512; // cp's FLAG_p
457 if (TT.i.user) TT.uid = xgetpwnamid(TT.i.user)->pw_uid;
458 if (TT.i.group) TT.gid = xgetgrnamid(TT.i.group)->gr_gid;
460 TT.callback = install_node;