98cb561b5f
When long options were disabled cp failed to compile with:
coreutils/cp.c:130:9: error: empty enum is invalid
130 | };
| ^
Rearrange the conditional compilation to suit.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
286 lines
8.5 KiB
C
286 lines
8.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini cp implementation for busybox
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*
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* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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* SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Size reduction.
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*/
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//config:config CP
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//config: bool "cp (10 kb)"
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//config: default y
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//config: help
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//config: cp is used to copy files and directories.
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//config:
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//config:config FEATURE_CP_LONG_OPTIONS
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//config: bool "Enable long options"
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//config: default y
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//config: depends on CP && LONG_OPTS
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//config: help
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//config: Enable long options.
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//config: Also add support for --parents option.
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//config:
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//config:config FEATURE_CP_REFLINK
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//config: bool "Enable --reflink[=auto]"
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//config: default y
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//config: depends on FEATURE_CP_LONG_OPTIONS
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//applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
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/* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */
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//kbuild:lib-$(CONFIG_CP) += cp.o
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
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// Options of cp from GNU coreutils 6.10:
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// -a, --archive
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// -f, --force
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// -i, --interactive
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// -l, --link
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// -L, --dereference
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// -P, --no-dereference
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// -R, -r, --recursive
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// -s, --symbolic-link
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// -v, --verbose
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// -H follow command-line symbolic links in SOURCE
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// -d same as --no-dereference --preserve=links
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// -p same as --preserve=mode,ownership,timestamps
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// -c same as --preserve=context
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// -u, --update
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// copy only when the SOURCE file is newer than the destination
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// file or when the destination file is missing
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// --remove-destination
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// remove each existing destination file before attempting to open
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// --parents
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// use full source file name under DIRECTORY
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// -T, --no-target-directory
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// treat DEST as a normal file
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// NOT SUPPORTED IN BBOX:
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// --backup[=CONTROL]
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// make a backup of each existing destination file
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// -b like --backup but does not accept an argument
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// --copy-contents
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// copy contents of special files when recursive
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// --preserve[=ATTR_LIST]
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// preserve attributes (default: mode,ownership,timestamps),
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// if possible additional attributes: security context,links,all
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// --no-preserve=ATTR_LIST
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// --sparse=WHEN
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// control creation of sparse files
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// --strip-trailing-slashes
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// remove any trailing slashes from each SOURCE argument
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// -S, --suffix=SUFFIX
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// override the usual backup suffix
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// -t, --target-directory=DIRECTORY
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// copy all SOURCE arguments into DIRECTORY
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// -x, --one-file-system
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// stay on this file system
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// -Z, --context=CONTEXT
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// (SELinux) set SELinux security context of copy to CONTEXT
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//usage:#define cp_trivial_usage
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//usage: "[-arPLHpfinlsTu] SOURCE DEST\n"
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//usage: "or: cp [-arPLHpfinlsu] SOURCE... { -t DIRECTORY | DIRECTORY }"
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//usage:#define cp_full_usage "\n\n"
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//usage: "Copy SOURCEs to DEST\n"
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//usage: "\n -a Same as -dpR"
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//usage: IF_SELINUX(
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//usage: "\n -c Preserve security context"
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//usage: )
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//usage: "\n -R,-r Recurse"
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//usage: "\n -d,-P Preserve symlinks (default if -R)"
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//usage: "\n -L Follow all symlinks"
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//usage: "\n -H Follow symlinks on command line"
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//usage: "\n -p Preserve file attributes if possible"
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//usage: "\n -f Overwrite"
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//usage: "\n -i Prompt before overwrite"
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//usage: "\n -n Don't overwrite"
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//usage: "\n -l,-s Create (sym)links"
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//usage: "\n -T Refuse to copy if DEST is a directory"
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//usage: "\n -t DIR Copy all SOURCEs into DIR"
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//usage: "\n -u Copy only newer files"
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#include "libbb.h"
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#include "libcoreutils/coreutils.h"
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/* This is a NOEXEC applet. Be very careful! */
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int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int cp_main(int argc, char **argv)
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{
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struct stat source_stat;
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struct stat dest_stat;
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const char *last;
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const char *dest;
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int s_flags;
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int d_flags;
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int flags;
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int status;
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#if ENABLE_FEATURE_CP_LONG_OPTIONS
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enum {
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/*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTBITS */
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OPT_parents = 1 << (FILEUTILS_CP_OPTBITS+1),
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OPT_reflink = 1 << (FILEUTILS_CP_OPTBITS+2),
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};
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# if ENABLE_FEATURE_CP_REFLINK
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char *reflink = NULL;
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# endif
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flags = getopt32long(argv, "^"
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FILEUTILS_CP_OPTSTR
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"\0"
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// Need at least one argument. (Usually two+, but -t DIR can have only one)
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// Soft- and hardlinking doesn't mix
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// -P and -d are the same (-P is POSIX, -d is GNU)
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// -r and -R are the same
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// -R (and therefore -r) turns on -d (coreutils does this)
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// -a = -pdR
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// -i overrides -n and vice versa (last wins)
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"-1:l--s:s--l:Pd:rRd:Rd:apdR:i-n:n-i",
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"archive\0" No_argument "a"
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"force\0" No_argument "f"
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"interactive\0" No_argument "i"
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"no-clobber\0" No_argument "n"
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"link\0" No_argument "l"
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"dereference\0" No_argument "L"
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"no-dereference\0" No_argument "P"
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"recursive\0" No_argument "R"
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"symbolic-link\0" No_argument "s"
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"no-target-directory\0" No_argument "T"
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"target-directory\0" Required_argument "t"
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"verbose\0" No_argument "v"
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"update\0" No_argument "u"
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"remove-destination\0" No_argument "\xff"
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"parents\0" No_argument "\xfe"
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# if ENABLE_FEATURE_CP_REFLINK
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"reflink\0" Optional_argument "\xfd"
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# endif
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, &last
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# if ENABLE_FEATURE_CP_REFLINK
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, &reflink
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# endif
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);
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# if ENABLE_FEATURE_CP_REFLINK
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BUILD_BUG_ON((int)OPT_reflink != (int)FILEUTILS_REFLINK);
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if (flags & FILEUTILS_REFLINK) {
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if (!reflink)
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flags |= FILEUTILS_REFLINK_ALWAYS;
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else if (strcmp(reflink, "always") == 0)
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flags |= FILEUTILS_REFLINK_ALWAYS;
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else if (strcmp(reflink, "auto") != 0)
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bb_show_usage();
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}
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# endif
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#else
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flags = getopt32(argv, "^"
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FILEUTILS_CP_OPTSTR
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"\0"
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"-1:l--s:s--l:Pd:rRd:Rd:apdR"
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, &last
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);
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#endif
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argc -= optind;
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argv += optind;
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/* Reverse this bit. If there is -d, bit is not set: */
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flags ^= FILEUTILS_DEREFERENCE;
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/* coreutils 6.9 compat:
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* by default, "cp" derefs symlinks (creates regular dest files),
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* but "cp -R" does not. We switch off deref if -r or -R (see above).
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* However, "cp -RL" must still deref symlinks: */
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if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
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flags |= FILEUTILS_DEREFERENCE;
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#if ENABLE_SELINUX
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if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
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selinux_or_die();
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}
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#endif
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status = EXIT_SUCCESS;
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if (!(flags & FILEUTILS_TARGET_DIR)) {
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last = argv[argc - 1];
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if (argc < 2)
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bb_show_usage();
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if (argc != 2) {
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if (flags & FILEUTILS_NO_TARGET_DIR)
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bb_show_usage();
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/* "cp A B C... DIR" - target must be dir */
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} else /* argc == 2 */ {
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/* "cp A B" - only case where target can be not a dir */
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s_flags = cp_mv_stat2(*argv, &source_stat,
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(flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
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if (s_flags < 0) /* error other than ENOENT */
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return EXIT_FAILURE;
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d_flags = cp_mv_stat(last, &dest_stat);
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if (d_flags < 0) /* error other than ENOENT */
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return EXIT_FAILURE;
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if (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */
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if (!(s_flags & 2) && (d_flags & 2))
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/* cp -T NOTDIR DIR */
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bb_error_msg_and_die("'%s' is a directory", last);
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}
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#if ENABLE_FEATURE_CP_LONG_OPTIONS
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//bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
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// flags, FILEUTILS_RMDEST, OPT_parents);
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if (flags & OPT_parents) {
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if (!(d_flags & 2)) {
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bb_simple_error_msg_and_die("with --parents, the destination must be a directory");
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}
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}
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if (flags & FILEUTILS_RMDEST) {
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flags |= FILEUTILS_FORCE;
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}
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#endif
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/* ...if neither is a directory... */
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if (!((s_flags | d_flags) & 2)
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/* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
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|| ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
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|| (flags & FILEUTILS_NO_TARGET_DIR)
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) {
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/* Do a simple copy */
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dest = last;
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goto DO_COPY; /* NB: argc==2 -> *++argv==last */
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}
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}
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}
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/* else: last is DIR from "-t DIR" */
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while (1) {
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#if ENABLE_FEATURE_CP_LONG_OPTIONS
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if (flags & OPT_parents) {
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char *dest_dup;
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char *dest_dir;
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dest = concat_path_file(last, *argv);
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dest_dup = xstrdup(dest);
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dest_dir = dirname(dest_dup);
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if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
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return EXIT_FAILURE;
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}
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free(dest_dup);
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goto DO_COPY;
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}
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#endif
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dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
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DO_COPY:
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if (copy_file(*argv, dest, flags) < 0) {
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status = EXIT_FAILURE;
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}
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if (!*++argv || *argv == last) {
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/* possibly leaking dest... */
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break;
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}
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/* don't move up: dest may be == last and not malloced! */
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free((void*)dest);
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}
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/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
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return status;
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}
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