diff options
Diffstat (limited to 'coreutils/cp.c')
-rw-r--r-- | coreutils/cp.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/coreutils/cp.c b/coreutils/cp.c new file mode 100644 index 0000000..40d3625 --- /dev/null +++ b/coreutils/cp.c @@ -0,0 +1,107 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini cp implementation for busybox + * + * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu> + * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp> + * + * Licensed under GPL v2 or later, see file LICENSE in this tarball for details. + */ + +/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ + +/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) + * + * Size reduction. + */ + +#include "libbb.h" +#include "libcoreutils/coreutils.h" + +/* 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) +{ + struct stat source_stat; + struct stat dest_stat; + const char *last; + const char *dest; + int s_flags; + int d_flags; + int flags; + int status = 0; + 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), + }; + + // 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:HL"; + flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPH"); + argc -= optind; + argv += optind; + flags ^= FILEUTILS_DEREFERENCE; /* the sense of this flag was reversed */ + /* 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; + /* The behavior of -H is *almost* like -L, but not quite, so let's + * just ignore it too for fun. TODO. + if (flags & OPT_H) ... // deref command-line params only + */ + +#if ENABLE_SELINUX + if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { + selinux_or_die(); + } +#endif + + 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 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) + ) { + /* ...do a simple copy. */ + dest = last; + goto DO_COPY; /* NB: argc==2 -> *++argv==last */ + } + } + + while (1) { + 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; + } + free((void*)dest); + } + + /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ + return status; +} |