X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fcp.c;h=de2e512be3b5ee510624b368a1f060615854055a;hb=a82e32d9ce199db01aaea92ebcb39a23d90e5b85;hp=78bd73c0f0a233a4e45da464d45dced88afbe1ed;hpb=091965768da4175d3763e61db56bba058d68ae3b;p=oweals%2Fbusybox.git diff --git a/coreutils/cp.c b/coreutils/cp.c index 78bd73c0f..de2e512be 100644 --- a/coreutils/cp.c +++ b/coreutils/cp.c @@ -5,7 +5,7 @@ * Copyright (C) 2000 by Matt Kraai * SELinux support by Yuichi Nakamura * - * Licensed under GPL v2 or later, see file LICENSE in this tarball for details. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ @@ -15,13 +15,29 @@ * 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" + #include "libbb.h" #include "libcoreutils/coreutils.h" /* This is a NOEXEC applet. Be very careful! */ - -int cp_main(int argc, char **argv); +int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int cp_main(int argc, char **argv) { struct stat source_stat; @@ -31,28 +47,96 @@ 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_L = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3), + OPT_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2), +#if ENABLE_FEATURE_CP_LONG_OPTIONS + OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3), +#endif }; - // Soft- and hardlinking don't mix + // 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 = "l--s:s--l:Pd:rR:apdR"; - flags = getopt32(argc, argv, FILEUTILS_CP_OPTSTR "arPHL"); - /* Default behavior of cp is to dereference, so we don't have to do - * anything special when we are given -L. - * The behavior of -H is *almost* like -L, but not quite, so let's - * just ignore it too for fun. - if (flags & OPT_L) ... - if (flags & OPT_H) ... // deref command-line params only - */ + 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) { @@ -60,44 +144,65 @@ int cp_main(int argc, char **argv) } #endif - flags ^= FILEUTILS_DEREFERENCE; /* The sense of this flag was reversed. */ - - if (optind + 2 > argc) { - bb_show_usage(); - } - + status = EXIT_SUCCESS; last = argv[argc - 1]; - argv += optind; - /* If there are only two arguments and... */ - if (optind + 2 == argc) { + if (argc == 2) { s_flags = cp_mv_stat2(*argv, &source_stat, - (flags & FILEUTILS_DEREFERENCE) ? stat : lstat); + (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 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. */ - dest = xstrdup(last); - goto DO_COPY; /* Note: optind+2==argc implies argv[1]==last below. */ + /* Do a simple copy */ + dest = last; + goto DO_COPY; /* NB: argc==2 -> *++argv==last */ } } - do { - dest = concat_path_file(last, bb_get_last_path_component(*argv)); + 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; + status = EXIT_FAILURE; } + if (*++argv == last) { + /* possibly leaking dest... */ + break; + } + /* don't move up: dest may be == last and not malloced! */ free((void*)dest); - } while (*++argv != last); + } + /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ return status; }