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cp: add support for --parents and long option synonyms of short opts

Browse Source 
By Ian Wienand (ianw AT vmware.com)

function                                             old     new   delta
cp_main                                              257     369    +112
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 112/0)             Total: 112 bytes
   text    data     bss     dec     hex filename
 823000     458    6948  830406   cabc6 busybox_old
 823283     458    6948  830689   cace1 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-09-26 14:31:04 +02:00
parent 67f7186403
commit 48f116198d
3 changed files with 68 additions and 17 deletions
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10
coreutils/Config.in
View File

@ -78,6 +78,14 @@ config CP
help
cp is used to copy files and directories.
config FEATURE_CP_LONG_OPTIONS
bool "Enable long options for cp"
default n
depends on CP
help
Enable long options for cp.
Also add support for --parents option.
config CUT
bool "cut"
default n
@ -113,7 +121,7 @@ config FEATURE_DD_SIGNAL_HANDLING
default y
depends on DD
help
sending a SIGUSR1 signal to a running `dd' process makes it
Sending a SIGUSR1 signal to a running `dd' process makes it
print to standard error the number of records read and written
so far, then to resume copying.

68
coreutils/cp.c
View File

@ -20,7 +20,6 @@
/* This is a NOEXEC applet. Be very careful! */
int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cp_main(int argc, char **argv)
{
@ -31,12 +30,16 @@ int cp_main(int argc, char **argv)
int s_flags;
int d_flags;
int flags;
int status = 0;
int status;
enum {
OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
OPT_H = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
OPT_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3),
#if ENABLE_FEATURE_CP_LONG_OPTIONS
OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+4),
#endif
};
// Need at least two arguments
@ -46,6 +49,20 @@ int cp_main(int argc, char **argv)
// -R (and therefore -r) turns on -d (coreutils does this)
// -a = -pdR
opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR:HL";
#if ENABLE_FEATURE_CP_LONG_OPTIONS
applet_long_options =
"archive\0" No_argument "a"
"force\0" No_argument "f"
"interactive\0" No_argument "i"
"link\0" No_argument "l"
"dereference\0" No_argument "L"
"no-dereference\0" No_argument "P"
"recursive\0" No_argument "R"
"symbolic-link\0" No_argument "s"
"verbose\0" No_argument "v"
"parents\0" No_argument "\xff"
;
#endif
// -v (--verbose) is ignored
flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHv");
/* Options of cp from GNU coreutils 6.10:
@ -62,8 +79,9 @@ int cp_main(int argc, char **argv)
* -d same as --no-dereference --preserve=links
* -p same as --preserve=mode,ownership,timestamps
* -c same as --preserve=context
* --parents
* use full source file name under DIRECTORY
* NOT SUPPORTED IN BBOX:
* long options are not supported (even those above).
* --backup[=CONTROL]
* make a backup of each existing destination file
* -b like --backup but does not accept an argument
@ -73,8 +91,6 @@ int cp_main(int argc, char **argv)
* preserve attributes (default: mode,ownership,timestamps),
* if possible additional attributes: security context,links,all
* --no-preserve=ATTR_LIST
* --parents
* use full source file name under DIRECTORY
* --remove-destination
* remove each existing destination file before attempting to open
* --sparse=WHEN
@ -115,6 +131,7 @@ int cp_main(int argc, char **argv)
}
#endif
status = EXIT_SUCCESS;
last = argv[argc - 1];
/* If there are only two arguments and... */
if (argc == 2) {
@ -126,28 +143,49 @@ int cp_main(int argc, char **argv)
if (d_flags < 0)
return EXIT_FAILURE;
/* ...if neither is a directory or... */
if ( !((s_flags | d_flags) & 2) ||
/* ...recursing, the 1st is a directory, and the 2nd doesn't exist... */
((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
#if ENABLE_FEATURE_CP_LONG_OPTIONS
if (flags & OPT_parents) {
if (!(d_flags & 2)) {
bb_error_msg_and_die("with --parents, the destination must be a directory");
}
}
#endif
/* ...if neither is a directory... */
if (!((s_flags | d_flags) & 2)
/* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
|| ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
) {
/* ...do a simple copy. */
/* Do a simple copy */
dest = last;
goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
}
while (1) {
#if ENABLE_FEATURE_CP_LONG_OPTIONS
if (flags & OPT_parents) {
char *dest_dup;
char *dest_dir;
dest = concat_path_file(last, *argv);
dest_dup = xstrdup(dest);
dest_dir = dirname(dest_dup);
if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
return EXIT_FAILURE;
}
free(dest_dup);
goto DO_COPY;
}
#endif
dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
status = 1;
}
if (*++argv == last) {
/* possibly leaking dest... */
break;
status = EXIT_FAILURE;
}
free((void*)dest);
if (*++argv == last) {
break;
}
}
/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */

5
testsuite/cp/cp-parents Normal file
View File

@ -0,0 +1,5 @@
mkdir -p foo/bar/baz
touch foo/bar/baz/file
mkdir dir
busybox cp --parents foo/bar/baz/file dir
test -f dir/foo/bar/baz/file