1 files changed, 96 insertions, 0 deletions

diff --git a/busybox/debianutils/which.c b/busybox/debianutils/which.c
new file mode 100644
index 000000000..999dded36
--- /dev/null
+++ b/busybox/debianutils/which.c
@@ -0,0 +1,96 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Which implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * 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
+ *
+ * Based on which from debianutils
+ */
+
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "busybox.h"
+
+
+extern int which_main(int argc, char **argv)
+{
+        char *path_list;
+        int i, count=1, status = EXIT_SUCCESS;
+
+        if (argc <= 1 || **(argv + 1) == '-') {
+                bb_show_usage();
+        }
+        argc--;
+
+        path_list = getenv("PATH");
+        if (path_list != NULL) {
+                for (i=strlen(path_list); i > 0; i--) {
+                        if (path_list[i]==':') {
+                                path_list[i]=0;
+                                count++;
+                        }
+                }
+        } else {
+                path_list = "/bin\0/sbin\0/usr/bin\0/usr/sbin\0/usr/local/bin";
+                count = 5;
+        }
+
+        while (argc-- > 0) {
+                char *buf;
+                char *path_n;
+                char found = 0;
+                argv++;
+
+                /*
+                 * Check if we were given the full path, first.
+                 * Otherwise see if the file exists in our $PATH.
+                 */
+                path_n = path_list;
+                buf = *argv;
+                if (access(buf, X_OK) == 0) {
+                        found = 1;
+                } else {
+                        for (i = 0; i < count; i++) {
+                                buf = concat_path_file(path_n, *argv);
+                                if (access(buf, X_OK) == 0) {
+                                        found = 1;
+                                        break;
+                                }
+                                free(buf);
+                                path_n += (strlen(path_n) + 1);
+                        }
+                }
+                if (found) {
+                        puts(buf);
+                } else {
+                        status = EXIT_FAILURE;
+                }
+        }
+        return status;
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/