X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=coreutils%2Fcp.c;h=de2e512be3b5ee510624b368a1f060615854055a;hb=a82e32d9ce199db01aaea92ebcb39a23d90e5b85;hp=83460190ae2158e3fa0c6417b1db3253873299d9;hpb=f664c004db12cdb3e379c1745351e225c7b92de7;p=oweals%2Fbusybox.git diff --git a/coreutils/cp.c b/coreutils/cp.c index 83460190a..de2e512be 100644 --- a/coreutils/cp.c +++ b/coreutils/cp.c @@ -1,122 +1,208 @@ +/* vi: set sw=4 ts=4: */ /* * Mini cp implementation for busybox * + * Copyright (C) 2000 by Matt Kraai + * SELinux support by Yuichi Nakamura * - * Copyright (C) 1999 by Lineo, inc. - * Written by Erik Andersen , - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ -#include "internal.h" -#include -#include -#include -#include +/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ -static const char cp_usage[] = "cp [OPTION]... SOURCE DEST\n" - " or: cp [OPTION]... SOURCE... DIRECTORY\n\n" - "Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.\n" - "\n" - "\t-a\tsame as -dpR\n" - "\t-d\tpreserve links\n" - "\t-p\tpreserve file attributes if possable\n" - "\t-R\tcopy directories recursively\n"; +/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) + * + * Size reduction. + */ +//usage:#define cp_trivial_usage +//usage: "[OPTIONS] SOURCE... DEST" +//usage:#define cp_full_usage "\n\n" +//usage: "Copy SOURCE(s) to DEST\n" +//usage: "\n -a Same as -dpR" +//usage: IF_SELINUX( +//usage: "\n -c Preserve security context" +//usage: ) +//usage: "\n -R,-r Recurse" +//usage: "\n -d,-P Preserve symlinks (default if -R)" +//usage: "\n -L Follow all symlinks" +//usage: "\n -H Follow symlinks on command line" +//usage: "\n -p Preserve file attributes if possible" +//usage: "\n -f Overwrite" +//usage: "\n -i Prompt before overwrite" +//usage: "\n -l,-s Create (sym)links" -static int recursiveFlag = FALSE; -static int followLinks = FALSE; -static int preserveFlag = FALSE; -static const char *srcName; -static const char *destName; -static int destDirFlag = FALSE; -static int srcDirFlag = FALSE; +#include "libbb.h" +#include "libcoreutils/coreutils.h" -static int fileAction(const char *fileName, struct stat* statbuf) -{ - char newdestName[NAME_MAX]; +/* This is a NOEXEC applet. Be very careful! */ - strcpy(newdestName, destName); - if ( srcDirFlag == TRUE ) { - if (recursiveFlag!=TRUE ) { - fprintf(stderr, "cp: %s: omitting directory\n", srcName); - return( TRUE); - } - strcat(newdestName, strstr(fileName, srcName) + strlen(srcName)); - } - - if (destDirFlag==TRUE && srcDirFlag == FALSE) { - if (newdestName[strlen(newdestName)-1] != '/' ) { - strcat(newdestName, "/"); - } - strcat(newdestName, srcName); - } - - return (copyFile(fileName, newdestName, preserveFlag, followLinks)); -} - -extern int cp_main(int argc, char **argv) +int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int cp_main(int argc, char **argv) { - if (argc < 3) { - usage (cp_usage); - } - argc--; - argv++; + struct stat source_stat; + struct stat dest_stat; + const char *last; + const char *dest; + int s_flags; + int d_flags; + int flags; + 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_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2), +#if ENABLE_FEATURE_CP_LONG_OPTIONS + OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3), +#endif + }; - /* Parse any options */ - while (**argv == '-') { - while (*++(*argv)) - switch (**argv) { - case 'a': - followLinks = TRUE; - preserveFlag = TRUE; - recursiveFlag = TRUE; - break; - case 'd': - followLinks = TRUE; - break; - case 'p': - preserveFlag = TRUE; - break; - case 'R': - recursiveFlag = TRUE; - break; - default: - usage (cp_usage); - } - argc--; - argv++; - } + // Need at least two arguments + // Soft- and hardlinking doesn't mix + // -P and -d are the same (-P is POSIX, -d is GNU) + // -r and -R are the same + // -R (and therefore -r) turns on -d (coreutils does this) + // -a = -pdR + opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR"; +#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 "arPv"); + /* Options of cp from GNU coreutils 6.10: + * -a, --archive + * -f, --force + * -i, --interactive + * -l, --link + * -L, --dereference + * -P, --no-dereference + * -R, -r, --recursive + * -s, --symbolic-link + * -v, --verbose + * -H follow command-line symbolic links in SOURCE + * -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: + * --backup[=CONTROL] + * make a backup of each existing destination file + * -b like --backup but does not accept an argument + * --copy-contents + * copy contents of special files when recursive + * --preserve[=ATTR_LIST] + * preserve attributes (default: mode,ownership,timestamps), + * if possible additional attributes: security context,links,all + * --no-preserve=ATTR_LIST + * --remove-destination + * remove each existing destination file before attempting to open + * --sparse=WHEN + * control creation of sparse files + * --strip-trailing-slashes + * remove any trailing slashes from each SOURCE argument + * -S, --suffix=SUFFIX + * override the usual backup suffix + * -t, --target-directory=DIRECTORY + * copy all SOURCE arguments into DIRECTORY + * -T, --no-target-directory + * treat DEST as a normal file + * -u, --update + * copy only when the SOURCE file is newer than the destination + * file or when the destination file is missing + * -x, --one-file-system + * stay on this file system + * -Z, --context=CONTEXT + * (SELinux) set SELinux security context of copy to CONTEXT + */ + argc -= optind; + argv += optind; + /* Reverse this bit. If there is -d, bit is not set: */ + flags ^= FILEUTILS_DEREFERENCE; + /* coreutils 6.9 compat: + * by default, "cp" derefs symlinks (creates regular dest files), + * but "cp -R" does not. We switch off deref if -r or -R (see above). + * However, "cp -RL" must still deref symlinks: */ + if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */ + flags |= FILEUTILS_DEREFERENCE; +#if ENABLE_SELINUX + if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { + selinux_or_die(); + } +#endif - destName = argv[argc - 1]; - destDirFlag = isDirectory(destName); + status = EXIT_SUCCESS; + last = argv[argc - 1]; + /* If there are only two arguments and... */ + if (argc == 2) { + s_flags = cp_mv_stat2(*argv, &source_stat, + (flags & FILEUTILS_DEREFERENCE) ? stat : lstat); + if (s_flags < 0) + return EXIT_FAILURE; + d_flags = cp_mv_stat(last, &dest_stat); + if (d_flags < 0) + return EXIT_FAILURE; - if ((argc > 3) && destDirFlag==FALSE) { - fprintf(stderr, "%s: not a directory\n", destName); - exit (FALSE); - } +#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 - while (argc-- > 1) { - srcName = *(argv++); - srcDirFlag = isDirectory(srcName); - if (recursiveAction(srcName, recursiveFlag, followLinks, FALSE, - fileAction, fileAction) == FALSE) { - exit( FALSE); + /* ...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 */ + dest = last; + goto DO_COPY; /* NB: argc==2 -> *++argv==last */ + } } - } - exit( TRUE); + + 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 = EXIT_FAILURE; + } + if (*++argv == last) { + /* possibly leaking dest... */ + break; + } + /* don't move up: dest may be == last and not malloced! */ + free((void*)dest); + } + + /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ + return status; }