Fixed mbtask disk check problem

ChangeLog

@@ -30,6 +30,8 @@ v0.51.3		22-Mar-2003
 
 	mbtask:
 		Fixed crash on NetBSD Sparc when getsysinfo was called.
+		Fixed disk search check when /opt/mbse is a symlink on a non-
+		root disk to display the correct partition.
 
 	mblogin:
 		Changed some defines for NetBSD 1.6.2

mbtask/taskdisk.c

@@ -56,6 +56,7 @@ pthread_mutex_t a_mutex = PTHREAD_MUTEX_INITIALIZER;
 /*
  * Internal prototypes
  */
+char *mbt_realpath(const char *, char *);
 void tidy_mfslist(mfs_list **);
 int  in_mfslist(char *, mfs_list **);
 void fill_mfslist(mfs_list **, char *, char *);
@@ -63,6 +64,122 @@ void update_diskstat(void);
 void add_path(char *);
 
 
+/*
+ * realpath.c -- canonicalize pathname by removing symlinks
+ * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
+ */
+
+#define HAVE_GETCWD
+
+/*
+ * This routine is part of libc.  We include it nevertheless,
+ * since the libc version has some security flaws.
+ */
+#define MAX_READLINKS 32
+
+char *mbt_realpath(const char *path, char *resolved_path)
+{
+    char copy_path[PATH_MAX], link_path[PATH_MAX], *new_path = resolved_path, *max_path;
+    int readlinks = 0, n;
+
+    /* Make a copy of the source path since we may need to modify it. */
+    if (strlen(path) >= PATH_MAX) {
+        errno = ENAMETOOLONG;
+        return NULL;
+    }
+    strcpy(copy_path, path);
+    path = copy_path;
+    max_path = copy_path + PATH_MAX - 2;
+
+    /* If it's a relative pathname use getwd for starters. */
+    if (*path != '/') {
+        getcwd(new_path, PATH_MAX - 1);
+        new_path += strlen(new_path);
+        if (new_path[-1] != '/')
+            *new_path++ = '/';
+    } else {
+        *new_path++ = '/';
+        path++;
+    }
+    /* Expand each slash-separated pathname component. */
+    while (*path != '\0') {
+	/* Ignore stray "/". */
+        if (*path == '/') {
+            path++;
+            continue;
+        }
+        if (*path == '.') {
+            /* Ignore ".". */
+            if (path[1] == '\0' || path[1] == '/') {
+                path++;
+                continue;
+            }
+            if (path[1] == '.') {
+                if (path[2] == '\0' || path[2] == '/') {
+                    path += 2;
+                    /* Ignore ".." at root. */
+                    if (new_path == resolved_path + 1)
+                        continue;
+                    /* Handle ".." by backing up. */
+                    while ((--new_path)[-1] != '/')
+                        ;
+                    continue;
+                }
+            }
+        }
+        /* Safely copy the next pathname component. */
+        while (*path != '\0' && *path != '/') {
+            if (path > max_path) {
+                errno = ENAMETOOLONG;
+                return NULL;
+            }
+            *new_path++ = *path++;
+        }
+#ifdef S_IFLNK
+        /* Protect against infinite loops. */
+        if (readlinks++ > MAX_READLINKS) {
+            errno = ELOOP;
+            return NULL;
+        }
+        /* See if latest pathname component is a symlink. */
+        *new_path = '\0';
+        n = readlink(resolved_path, link_path, PATH_MAX - 1);
+        if (n < 0) {
+            /* EINVAL means the file exists but isn't a symlink. */
+            if (errno != EINVAL)
+                return NULL;
+        } else {
+            /* Note: readlink doesn't add the null byte. */
+            link_path[n] = '\0';
+            if (*link_path == '/')
+                /* Start over for an absolute symlink. */
+                new_path = resolved_path;
+            else
+                /* Otherwise back up over this component. */
+                while (*(--new_path) != '/')
+                    ;
+            /* Safe sex check. */
+            if (strlen(path) + n >= PATH_MAX) {
+                errno = ENAMETOOLONG;
+                return NULL;
+	    }
+	    /* Insert symlink contents into path. */
+            strcat(link_path, path);
+            strcpy(copy_path, link_path);
+            path = copy_path;
+        }
+#endif /* S_IFLNK */
+        *new_path++ = '/';
+    }
+    /* Delete trailing slash but don't whomp a lone slash. */
+    if (new_path != resolved_path + 1 && new_path[-1] == '/')
+        new_path--;
+    /* Make sure it's null terminated. */
+    *new_path = '\0';
+    return resolved_path;
+}
+
+
 
 /*
  * Reset mounted filesystems array
@@ -285,7 +402,7 @@ void add_path(char *lpath)
     }
 
 	rpath = calloc(PATH_MAX, sizeof(char));
-        realpath(lpath, rpath);
+        mbt_realpath(lpath, rpath);
         Syslog('d', "realpath %s", MBSE_SS(rpath));
 
     if (lstat(rpath, &sb) == 0) {