lineedit: do not hang on error, but return error indicator.

[oweals/busybox.git] / coreutils / mv.c

diff --git a/coreutils/mv.c b/coreutils/mv.c
index 22c4a12077c0222276969ea67d7599e05262c6c8..7f49d5babd5f043c8d2ce140d797a09bed2d5f6e 100644 (file)
--- a/coreutils/mv.c
+++ b/coreutils/mv.c
@@ -1,38 +1,135 @@
-#include "internal.h"
-#include <stdio.h>
-#include <errno.h>
-
-const char     mv_usage[] = "mv source-file destination-file\n"
-"\t\tmv source-file [source-file ...] destination-directory\n"
-"\n"
-"\tMove the source files to the destination.\n"
-"\n";
-
-extern int
-mv_fn(const struct FileInfo * i)
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini mv implementation for busybox
+ *
+ * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
+ *
+ * Size reduction and improved error checking.
+ */
+
+#include "libbb.h"
+#include "libcoreutils/coreutils.h"
+
+#if ENABLE_FEATURE_MV_LONG_OPTIONS
+static const char mv_longopts[] ALIGN1 =
+       "interactive\0" No_argument "i"
+       "force\0"       No_argument "f"
+       ;
+#endif
+
+#define OPT_FILEUTILS_FORCE       1
+#define OPT_FILEUTILS_INTERACTIVE 2
+
+int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int mv_main(int argc, char **argv)
 {
-       struct stat             destination_stat;
-       char                    d[1024];
-       struct FileInfo n;
-
-       if ( stat(i->destination, &destination_stat) == 0 ) {
-               if ( i->stat.st_ino == destination_stat.st_ino
-                &&  i->stat.st_dev == destination_stat.st_dev )
-                       return 0;       /* Move file to itself. */
-       }
-       if ( (destination_stat.st_mode & S_IFMT) == S_IFDIR ) {
-               n = *i;
-               n.destination = join_paths(d, i->destination, basename(i->source));
-               i = &n;
-       }
-       if ( rename(i->source, i->destination) == 0 )
-               return 0;
-       else if ( errno == EXDEV && is_a_directory(i->source) ) {
-               fprintf(stderr
-               ,"%s: Can't move directory across filesystems.\n"
-               ,i->source);
-               return 1;
+       struct stat dest_stat;
+       const char *last;
+       const char *dest;
+       unsigned flags;
+       int dest_exists;
+       int status = 0;
+       int copy_flag = 0;
+
+#if ENABLE_FEATURE_MV_LONG_OPTIONS
+       applet_long_options = mv_longopts;
+#endif
+       // Need at least two arguments
+       // -f unsets -i, -i unsets -f
+       opt_complementary = "-2:f-i:i-f";
+       flags = getopt32(argv, "fi");
+       argc -= optind;
+       argv += optind;
+       last = argv[argc - 1];
+
+       if (argc == 2) {
+               dest_exists = cp_mv_stat(last, &dest_stat);
+               if (dest_exists < 0) {
+                       return EXIT_FAILURE;
+               }
+
+               if (!(dest_exists & 2)) { /* last is not a directory */
+                       dest = last;
+                       goto DO_MOVE;
+               }
        }
-       else
-               return cp_fn(i);
+
+       do {
+               dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
+               dest_exists = cp_mv_stat(dest, &dest_stat);
+               if (dest_exists < 0) {
+                       goto RET_1;
+               }
+
+ DO_MOVE:
+               if (dest_exists
+                && !(flags & OPT_FILEUTILS_FORCE)
+                && ((access(dest, W_OK) < 0 && isatty(0))
+                   || (flags & OPT_FILEUTILS_INTERACTIVE))
+               ) {
+                       if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
+                               goto RET_1;     /* Ouch! fprintf failed! */
+                       }
+                       if (!bb_ask_confirmation()) {
+                               goto RET_0;
+                       }
+               }
+               if (rename(*argv, dest) < 0) {
+                       struct stat source_stat;
+                       int source_exists;
+
+                       if (errno != EXDEV
+                        || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1
+                       ) {
+                               bb_perror_msg("can't rename '%s'", *argv);
+                       } else {
+                               static const char fmt[] ALIGN1 =
+                                       "can't overwrite %sdirectory with %sdirectory";
+
+                               if (dest_exists) {
+                                       if (dest_exists == 3) {
+                                               if (source_exists != 3) {
+                                                       bb_error_msg(fmt, "", "non-");
+                                                       goto RET_1;
+                                               }
+                                       } else {
+                                               if (source_exists == 3) {
+                                                       bb_error_msg(fmt, "non-", "");
+                                                       goto RET_1;
+                                               }
+                                       }
+                                       if (unlink(dest) < 0) {
+                                               bb_perror_msg("can't remove '%s'", dest);
+                                               goto RET_1;
+                                       }
+                               }
+                               /* FILEUTILS_RECUR also prevents nasties like
+                                * "read from device and write contents to dst"
+                                * instead of "create same device node" */
+                               copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
+#if ENABLE_SELINUX
+                               copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
+#endif
+                               if ((copy_file(*argv, dest, copy_flag) >= 0)
+                                && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
+                               ) {
+                                       goto RET_0;
+                               }
+                       }
+ RET_1:
+                       status = 1;
+               }
+ RET_0:
+               if (dest != last) {
+                       free((void *) dest);
+               }
+       } while (*++argv != last);
+
+       return status;
 }