From 468048ccc3663a4ca944c6b58c788d22626585c1 Mon Sep 17 00:00:00 2001
From: Andrew McCall <mccall@nowhere.fake>
Date: Mon, 19 Aug 2002 11:31:16 +0000
Subject: [PATCH] A quick port of pwd, it compiles OK, but I haven't had chance
 to test it as I am at work!

Can someone point out what I should replace err() with from err.h when its
called please! - Andrew McCall


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@824 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kernel/apps/pwd/Jamfile |   3 +
 src/kernel/apps/pwd/main.c  | 119 ++++++++++++++++++++++++++++++++++++
 2 files changed, 122 insertions(+)
 create mode 100644 src/kernel/apps/pwd/Jamfile
 create mode 100644 src/kernel/apps/pwd/main.c

diff --git a/src/kernel/apps/pwd/Jamfile b/src/kernel/apps/pwd/Jamfile
new file mode 100644
index 0000000000..6879eaad5c
--- /dev/null
+++ b/src/kernel/apps/pwd/Jamfile
@@ -0,0 +1,3 @@
+SubDir OBOS_TOP src kernel apps pwd ;
+
+KernelObjects <$(SOURCE_GRIST)>main.c : -fpic -Wno-unused ;
diff --git a/src/kernel/apps/pwd/main.c b/src/kernel/apps/pwd/main.c
new file mode 100644
index 0000000000..870a43a26a
--- /dev/null
+++ b/src/kernel/apps/pwd/main.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 1991, 1993, 1994
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+//#include <sys/cdefs.h>
+
+//#include <sys/param.h>
+#include <sys/stat.h>
+//#include <sys/types.h>
+#include <ktypes.h>
+
+//#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static char *getcwd_logical(void);
+void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+        int physical;
+        int ch;
+        char *p;
+
+        physical = 1;
+        while ((ch = getopt(argc, argv, "LP")) != -1)
+                switch (ch) {
+                case 'L':
+                        physical = 0;
+                        break;
+                case 'P':
+                        physical = 1;
+                        break;
+                case '?':
+                default:
+                        usage();
+                }
+        argc -= optind;
+        argv += optind;
+
+        if (argc != 0)
+                usage();
+
+        /*
+         * If we're trying to find the logical current directory and that
+         * fails, behave as if -P was specified.
+         */
+        if ((!physical && (p = getcwd_logical()) != NULL) ||
+            (p = getcwd(NULL, 0)) != NULL)
+                printf("%s\n", p);
+        else
+                //err(1, ".");	Taken a quick look at this
+		//		perhaps it could be replaced with
+		//		just an exit(1) ? Andrew McCall
+
+        exit(0);
+}
+
+void
+usage(void)
+{
+
+        (void)fprintf(stderr, "usage: pwd [-LP]\n");
+        exit(1);
+}
+
+static char *
+getcwd_logical(void)
+{
+        struct stat log, phy;
+        char *pwd;
+
+        /*
+         * Check that $PWD is an absolute logical pathname referring to
+         * the current working directory.
+         */
+        if ((pwd = getenv("PWD")) != NULL && *pwd == '/') {
+                if (stat(pwd, &log) == -1 || stat(".", &phy) == -1)
+                        return (NULL);
+                if (log.st_dev == phy.st_dev && log.st_ino == phy.st_ino)
+                        return (pwd);
+        }
+
+        errno = ENOENT;
+        return (NULL);
+}
+