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-rw-r--r--toys/posix/cp.c354
1 files changed, 173 insertions, 181 deletions
diff --git a/toys/posix/cp.c b/toys/posix/cp.c
index b7834e86..e25dad46 100644
--- a/toys/posix/cp.c
+++ b/toys/posix/cp.c
@@ -1,8 +1,4 @@
-/* vi: set sw=4 ts=4:
- *
- * cp.c - Copy files.
- *
- * Copyright 2008 Rob Landley <rob@landley.net>
+/* Copyright 2008 Rob Landley <rob@landley.net>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/cp.html
*
@@ -11,35 +7,35 @@
USE_CP(NEWTOY(cp, "<2"USE_CP_MORE("rdavsl")"RHLPfip", TOYFLAG_BIN))
config CP
- bool "cp (broken by dirtree changes)"
- default n
- help
- usage: cp [-fipRHLP] SOURCE... DEST
-
- Copy files from SOURCE to DEST. If more than one SOURCE, DEST must
- be a directory.
-
- -f force copy by deleting destination file
- -i interactive, prompt before overwriting existing DEST
- -p preserve timestamps, ownership, and permissions
- -R recurse into subdirectories (DEST must be a directory)
- -H Follow symlinks listed on command line
- -L Follow all symlinks
- -P Do not follow symlinks [default]
+ bool "cp (broken by dirtree changes)"
+ default n
+ help
+ usage: cp [-fipRHLP] SOURCE... DEST
+
+ Copy files from SOURCE to DEST. If more than one SOURCE, DEST must
+ be a directory.
+
+ -f force copy by deleting destination file
+ -i interactive, prompt before overwriting existing DEST
+ -p preserve timestamps, ownership, and permissions
+ -R recurse into subdirectories (DEST must be a directory)
+ -H Follow symlinks listed on command line
+ -L Follow all symlinks
+ -P Do not follow symlinks [default]
config CP_MORE
- bool "cp -rdavsl options"
- default y
- depends on CP
- help
- usage: cp [-rdavsl]
-
- -r synonym for -R
- -d don't dereference symlinks
- -a same as -dpr
- -l hard link instead of copy
- -s symlink instead of copy
- -v verbose
+ bool "cp -rdavsl options"
+ default y
+ depends on CP
+ help
+ usage: cp [-rdavsl]
+
+ -r synonym for -R
+ -d don't dereference symlinks
+ -a same as -dpr
+ -l hard link instead of copy
+ -s symlink instead of copy
+ -v verbose
*/
#define FOR_cp
@@ -48,180 +44,176 @@ config CP_MORE
// TODO: PLHlsd
GLOBALS(
- char *destname;
- int destisdir;
- int keep_symlinks;
+ char *destname;
+ int destisdir;
+ int keep_symlinks;
)
// Copy an individual file or directory to target.
void cp_file(char *src, char *dst, struct stat *srcst)
{
- int fdout = -1;
-
- // -i flag is specified and dst file exists.
- if ((toys.optflags&FLAG_i) && !access(dst, R_OK)
- && !yesno("cp: overwrite", 1))
- return;
-
- if (toys.optflags & FLAG_v)
- printf("'%s' -> '%s'\n", src, dst);
-
- // Copy directory or file to destination.
-
- if (S_ISDIR(srcst->st_mode)) {
- struct stat st2;
-
- // Always make directory writeable to us, so we can create files in it.
- //
- // Yes, there's a race window between mkdir() and open() so it's
- // possible that -p can be made to chown a directory other than the one
- // we created. The closest we can do to closing this is make sure
- // that what we open _is_ a directory rather than something else.
-
- if ((mkdir(dst, srcst->st_mode | 0200) && errno != EEXIST)
- || 0>(fdout=open(dst, 0)) || fstat(fdout, &st2)
- || !S_ISDIR(st2.st_mode))
- {
- perror_exit("mkdir '%s'", dst);
- }
- } else if (TT.keep_symlinks && S_ISLNK(srcst->st_mode)) {
- char *link = xreadlink(src);
-
- // Note: -p currently has no effect on symlinks. How do you get a
- // filehandle to them? O_NOFOLLOW causes the open to fail.
- if (!link || symlink(link, dst)) perror_msg("link '%s'", dst);
- free(link);
- return;
- } else if (toys.optflags & FLAG_l) {
- if (link(src, dst)) perror_msg("link '%s'");
- return;
- } else {
- int fdin, i;
-
- fdin = xopen(src, O_RDONLY);
- for (i=2 ; i; i--) {
- fdout = open(dst, O_RDWR|O_CREAT|O_TRUNC, srcst->st_mode);
- if (fdout>=0 || !(toys.optflags & FLAG_f)) break;
- unlink(dst);
- }
- if (fdout<0) perror_exit("%s", dst);
- xsendfile(fdin, fdout);
- close(fdin);
- }
-
- // Inability to set these isn't fatal, some require root access.
- // Can't do fchmod() etc here because -p works on mkdir, too.
-
- if (toys.optflags & (FLAG_p|FLAG_a)) {
- int mask = umask(0);
- struct utimbuf ut;
-
- (void) fchown(fdout,srcst->st_uid, srcst->st_gid);
- ut.actime = srcst->st_atime;
- ut.modtime = srcst->st_mtime;
- utime(dst, &ut);
- umask(mask);
- }
- xclose(fdout);
+ int fdout = -1;
+
+ // -i flag is specified and dst file exists.
+ if ((toys.optflags&FLAG_i) && !access(dst, R_OK)
+ && !yesno("cp: overwrite", 1))
+ return;
+
+ if (toys.optflags & FLAG_v) printf("'%s' -> '%s'\n", src, dst);
+
+ // Copy directory or file to destination.
+
+ if (S_ISDIR(srcst->st_mode)) {
+ struct stat st2;
+
+ // Always make directory writeable to us, so we can create files in it.
+ //
+ // Yes, there's a race window between mkdir() and open() so it's
+ // possible that -p can be made to chown a directory other than the one
+ // we created. The closest we can do to closing this is make sure
+ // that what we open _is_ a directory rather than something else.
+
+ if ((mkdir(dst, srcst->st_mode | 0200) && errno != EEXIST)
+ || 0>(fdout=open(dst, 0)) || fstat(fdout, &st2) || !S_ISDIR(st2.st_mode))
+ {
+ perror_exit("mkdir '%s'", dst);
+ }
+ } else if (TT.keep_symlinks && S_ISLNK(srcst->st_mode)) {
+ char *link = xreadlink(src);
+
+ // Note: -p currently has no effect on symlinks. How do you get a
+ // filehandle to them? O_NOFOLLOW causes the open to fail.
+ if (!link || symlink(link, dst)) perror_msg("link '%s'", dst);
+ free(link);
+ return;
+ } else if (toys.optflags & FLAG_l) {
+ if (link(src, dst)) perror_msg("link '%s'");
+ return;
+ } else {
+ int fdin, i;
+
+ fdin = xopen(src, O_RDONLY);
+ for (i=2 ; i; i--) {
+ fdout = open(dst, O_RDWR|O_CREAT|O_TRUNC, srcst->st_mode);
+ if (fdout>=0 || !(toys.optflags & FLAG_f)) break;
+ unlink(dst);
+ }
+ if (fdout<0) perror_exit("%s", dst);
+ xsendfile(fdin, fdout);
+ close(fdin);
+ }
+
+ // Inability to set these isn't fatal, some require root access.
+ // Can't do fchmod() etc here because -p works on mkdir, too.
+
+ if (toys.optflags & (FLAG_p|FLAG_a)) {
+ int mask = umask(0);
+ struct utimbuf ut;
+
+ (void) fchown(fdout,srcst->st_uid, srcst->st_gid);
+ ut.actime = srcst->st_atime;
+ ut.modtime = srcst->st_mtime;
+ utime(dst, &ut);
+ umask(mask);
+ }
+ xclose(fdout);
}
// Callback from dirtree_read() for each file/directory under a source dir.
int cp_node(struct dirtree *node)
{
- char *path = dirtree_path(node, 0); // TODO: use openat() instead
- char *s = path+strlen(path);
- struct dirtree *n;
-
- // Find appropriate chunk of path for destination.
-
- n = node;
- if (!TT.destisdir) n = n->parent;
- for (;;n = n->parent) {
- while (s!=path) {
- if (*(--s)=='/') break;
- }
- if (!n) break;
- }
- if (s != path) s++;
-
- s = xmsprintf("%s/%s", TT.destname, s);
- cp_file(path, s, &(node->st));
- free(s);
- free(path); // redo this whole darn function.
-
- return 0;
+ char *path = dirtree_path(node, 0); // TODO: use openat() instead
+ char *s = path+strlen(path);
+ struct dirtree *n;
+
+ // Find appropriate chunk of path for destination.
+
+ n = node;
+ if (!TT.destisdir) n = n->parent;
+ for (;;n = n->parent) {
+ while (s!=path) if (*(--s)=='/') break;
+ if (!n) break;
+ }
+ if (s != path) s++;
+
+ s = xmsprintf("%s/%s", TT.destname, s);
+ cp_file(path, s, &(node->st));
+ free(s);
+ free(path); // redo this whole darn function.
+
+ return 0;
}
void cp_main(void)
{
- char *dpath = NULL;
- struct stat st, std;
- int i;
+ char *dpath = NULL;
+ struct stat st, std;
+ int i;
- // Identify destination
+ // Identify destination
- if (!stat(TT.destname, &std) && S_ISDIR(std.st_mode)) TT.destisdir++;
- else if (toys.optc>1) error_exit("'%s' not directory", TT.destname);
+ if (!stat(TT.destname, &std) && S_ISDIR(std.st_mode)) TT.destisdir++;
+ else if (toys.optc>1) error_exit("'%s' not directory", TT.destname);
// TODO: This is too early: we haven't created it yet if we need to
- if (toys.optflags & (FLAG_R|FLAG_r|FLAG_a))
- dpath = realpath(TT.destname = toys.optargs[--toys.optc], NULL);
+ if (toys.optflags & (FLAG_R|FLAG_r|FLAG_a))
+ dpath = realpath(TT.destname = toys.optargs[--toys.optc], NULL);
- // Loop through sources
+ // Loop through sources
- for (i=0; i<toys.optc; i++) {
- char *dst, *src = toys.optargs[i];
+ for (i=0; i<toys.optc; i++) {
+ char *dst, *src = toys.optargs[i];
- // Skip src==dest (TODO check inodes to catch "cp blah ./blah").
+ // Skip src==dest (TODO check inodes to catch "cp blah ./blah").
- if (!strncmp(src, TT.destname)) continue;
+ if (!strncmp(src, TT.destname)) continue;
- // Skip nonexistent sources.
+ // Skip nonexistent sources.
- TT.keep_symlinks = toys.optflags & (FLAG_d|FLAG_a);
- if (TT.keep_symlinks ? lstat(src, &st) : stat(src, &st)
- || (st.st_dev = dst.st_dev && st.st_ino == dst.dst_ino))
- {
+ TT.keep_symlinks = toys.optflags & (FLAG_d|FLAG_a);
+ if (TT.keep_symlinks ? lstat(src, &st) : stat(src, &st)
+ || (st.st_dev = dst.st_dev && st.st_ino == dst.dst_ino))
+ {
objection:
- perror_msg("bad '%s'", src);
- toys.exitval = 1;
- continue;
- }
-
- // Copy directory or file.
-
- if (TT.destisdir) {
- char *s;
-
- // Catch "cp -R .. ." and friends that would go on forever
- if (dpath && (s = realpath(src, NULL)) {
- int i = strlen(s);
- i = (!strncmp(s, dst, i) && (!s[i] || s[i]=='/'));
- free(s);
-
- if (i) goto objection;
- }
-
- // Create destination filename within directory
- dst = strrchr(src, '/');
- if (dst) dst++;
- else dst=src;
- dst = xmsprintf("%s/%s", TT.destname, dst);
- } else dst = TT.destname;
-
- if (S_ISDIR(st.st_mode)) {
- if (toys.optflags & (FLAG_r|FLAG_R|FLAG_a)) {
- cp_file(src, dst, &st);
-
- TT.keep_symlinks++;
- dirtree_read(src, cp_node);
- } else error_msg("Skipped dir '%s'", src);
- } else cp_file(src, dst, &st);
- if (TT.destisdir) free(dst);
- }
-
- if (CFG_TOYBOX_FREE) free(dpath);
- return;
+ perror_msg("bad '%s'", src);
+ toys.exitval = 1;
+ continue;
+ }
+
+ // Copy directory or file.
+
+ if (TT.destisdir) {
+ char *s;
+
+ // Catch "cp -R .. ." and friends that would go on forever
+ if (dpath && (s = realpath(src, NULL)) {
+ int i = strlen(s);
+ i = (!strncmp(s, dst, i) && (!s[i] || s[i]=='/'));
+ free(s);
+
+ if (i) goto objection;
+ }
+
+ // Create destination filename within directory
+ dst = strrchr(src, '/');
+ if (dst) dst++;
+ else dst=src;
+ dst = xmsprintf("%s/%s", TT.destname, dst);
+ } else dst = TT.destname;
+
+ if (S_ISDIR(st.st_mode)) {
+ if (toys.optflags & (FLAG_r|FLAG_R|FLAG_a)) {
+ cp_file(src, dst, &st);
+
+ TT.keep_symlinks++;
+ dirtree_read(src, cp_node);
+ } else error_msg("Skipped dir '%s'", src);
+ } else cp_file(src, dst, &st);
+ if (TT.destisdir) free(dst);
+ }
+
+ if (CFG_TOYBOX_FREE) free(dpath);
+ return;
}
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