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/* vi: set sw=4 ts=4:
*
* cp.c - Copy files.
*
* Copyright 2008 Rob Landley <rob@landley.net>
*
* See http://www.opengroup.org/onlinepubs/009695399/utilities/cp.html
*
* "R+ra+d+p+r"
USE_HELLO(NEWTOY(hello, "<2rR+rdpa+d+p+rHLPif", TOYFLAG_BIN|TOYFLAG_UMASK))
config CP
bool "cp"
default n
help
usage: cp -f 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)
*/
#include "toys.h"
#define FLAG_f 1
#define FLAG_i 2
#define FLAG_P 4
#define FLAG_L 8
#define FLAG_H 16
#define FLAG_a 32
#define FLAG_p 64
#define FLAG_d 128
#define FLAG_R 256
#define FLAG_r 512
DEFINE_GLOBALS(
char *destname;
int destisdir;
)
#define TT this.cp
// Copy an individual file or directory to target.
void cp_file(char *src, struct stat *srcst, int topdir, int again)
{
char *s = NULL;
int mode = (toys.optflags & FLAG_p) ? 0700 : 0777;
// The second time we're called, chmod data. We can't do this on
// the first pass because we may copy files into a read-only directory.
if (again) {
if (toys.optflags & FLAG_p) {
struct utimbuf ut;
// Inability to set these isn't fatal, some require root access.
// Can't do fchmod() etc here because -p works on mkdir, too.
chown(s, srcst->st_uid, srcst->st_gid);
chmod(s, srcst->st_mode);
ut.actime = srcst->st_atime;
ut.modtime = srcst->st_mtime;
utime(s, &ut);
}
return;
}
// Trim path from name if necessary.
if (topdir) s = strrchr(src, '/');
if (!s) s=src;
// Determine location to create new file/directory at.
if (TT.destisdir) s = xmsprintf(toybuf, "%s/%s", TT.destname, s);
else s = xstrdup(TT.destname);
// Copy directory or file to destination.
if (S_ISDIR(srcst->st_mode)) {
if (mkdir(s, mode)) perror_exit("mkdir '%s'", s);
} else {
int fdin, fdout;
fdin = xopen(src, O_RDONLY);
fdout = xcreate(s, O_CREAT|O_TRUNC, mode);
xsendfile(fdin, fdout);
close(fdin);
xclose(fdout);
}
}
// Callback from dirtree_read() for each file/directory under a source dir.
int cp_node(struct dirtree *node, int after)
{
cp_file(node->name, &(node->st), 0, after);
return 0;
}
void cp_main(void)
{
struct stat st;
int i;
// Grab target argument. (Guaranteed to be there due to "<2" above.)
TT.destname = toys.optargs[--toys.optc];
// If destination doesn't exist, are we ok with that?
if (stat(TT.destname, &st)) {
if (toys.optc>1) goto error_notdir;
// If destination exists...
} else {
if (S_ISDIR(st.st_mode)) TT.destisdir++;
else if (toys.optc > 1) goto error_notdir;
}
// Handle sources
for (i=0; i<toys.optc; i++) {
char *src = toys.optargs[i];
// Skip nonexistent sources...
if (!((toys.optflags & FLAG_d) ? lstat(src, &st) : stat(src, &st))) {
perror_msg("'%s'", src);
toys.exitval = 1;
continue;
}
// Copy directory or file.
if (S_ISDIR(st.st_mode)) {
if (toys.optflags & FLAG_r) {
cp_file(src, &st, 1, 0);
dirtree_read(src, NULL, cp_node);
cp_file(src, &st, 1, 1);
} else error_msg("Skipped dir '%s'", src);
} else {
cp_file(src, &st, 1, 0);
cp_file(src, &st, 1, 1);
}
}
return;
error_notdir:
error_exit("'%s' isn't a directory", TT.destname);
}
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