diff --git a/fastboot/fastboot.c b/fastboot/fastboot.c
index 57363d8..b6eab8c 100644
--- a/fastboot/fastboot.c
+++ b/fastboot/fastboot.c
@@ -156,6 +156,7 @@
     char *data;
     int sz;
     int fd;
+    int errno_tmp;
 
     data = 0;
     fd = open(fn, O_RDONLY);
@@ -176,8 +177,10 @@
     return data;
 
 oops:
+    errno_tmp = errno;
     close(fd);
     if(data != 0) free(data);
+    errno = errno_tmp;
     return 0;
 }
 #endif
@@ -298,7 +301,7 @@
 
     kdata = load_file(kernel, &ksize);
     if(kdata == 0) {
-        fprintf(stderr, "cannot load '%s'\n", kernel);
+        fprintf(stderr, "cannot load '%s': %s\n", kernel, strerror(errno));
         return 0;
     }
 
@@ -318,7 +321,7 @@
     if(ramdisk) {
         rdata = load_file(ramdisk, &rsize);
         if(rdata == 0) {
-            fprintf(stderr,"cannot load '%s'\n", ramdisk);
+            fprintf(stderr,"cannot load '%s': %s\n", ramdisk, strerror(errno));
             return  0;
         }
     }
@@ -564,7 +567,7 @@
     } else {
         unsigned int sz;
         data = load_file(fname, &sz);
-        if (data == 0) die("cannot load '%s'\n", fname);
+        if (data == 0) die("cannot load '%s': %s\n", fname, strerror(errno));
         fb_queue_flash(pname, data, sz);
     }
 }
@@ -592,7 +595,7 @@
     fb_queue_query_save("product", cur_product, sizeof(cur_product));
 
     zdata = load_file(fn, &zsize);
-    if (zdata == 0) die("failed to load '%s'", fn);
+    if (zdata == 0) die("failed to load '%s': %s", fn, strerror(errno));
 
     zip = init_zipfile(zdata, zsize);
     if(zip == 0) die("failed to access zipdata in '%s'");
@@ -662,12 +665,12 @@
     fname = find_item("info", product);
     if (fname == 0) die("cannot find android-info.txt");
     data = load_file(fname, &sz);
-    if (data == 0) die("could not load android-info.txt");
+    if (data == 0) die("could not load android-info.txt: %s", strerror(errno));
     setup_requirements(data, sz);
 
     fname = find_item("boot", product);
     data = load_file(fname, &sz);
-    if (data == 0) die("could not load boot.img");
+    if (data == 0) die("could not load boot.img: %s", strerror(errno));
     do_send_signature(fname);
     fb_queue_flash("boot", data, sz);
 
@@ -680,7 +683,7 @@
 
     fname = find_item("system", product);
     data = load_file(fname, &sz);
-    if (data == 0) die("could not load system.img");
+    if (data == 0) die("could not load system.img: %s", strerror(errno));
     do_send_signature(fname);
     fb_queue_flash("system", data, sz);
 }
@@ -847,7 +850,7 @@
         } else if(!strcmp(*argv, "signature")) {
             require(2);
             data = load_file(argv[1], &sz);
-            if (data == 0) die("could not load '%s'", argv[1]);
+            if (data == 0) die("could not load '%s': %s", argv[1], strerror(errno));
             if (sz != 256) die("signature must be 256 bytes");
             fb_queue_download("signature", data, sz);
             fb_queue_command("signature", "installing signature");
diff --git a/include/diskconfig/diskconfig.h b/include/diskconfig/diskconfig.h
index d4f468c..d45b99e 100644
--- a/include/diskconfig/diskconfig.h
+++ b/include/diskconfig/diskconfig.h
@@ -19,6 +19,7 @@
 #define __LIBS_DISKCONFIG_H
 
 #include <stdint.h>
+#include <sys/types.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/init/builtins.c b/init/builtins.c
index 5bda7a0..882ceb5 100644
--- a/init/builtins.c
+++ b/init/builtins.c
@@ -799,6 +799,8 @@
 {
     if (nargs == 2) {
         return wait_for_file(args[1], COMMAND_RETRY_TIMEOUT);
-    }
-    return -1;
+    } else if (nargs == 3) {
+        return wait_for_file(args[1], atoi(args[2]));
+    } else
+        return -1;
 }
diff --git a/init/readme.txt b/init/readme.txt
index df524a6..fe0d15d 100644
--- a/init/readme.txt
+++ b/init/readme.txt
@@ -207,6 +207,11 @@
    Trigger an event.  Used to queue an action from another
    action.
 
+wait <path> [ <timeout> ]
+  Poll for the existence of the given file and return when found,
+  or the timeout has been reached. If timeout is not specified it
+  currently defaults to five seconds.
+
 write <path> <string> [ <string> ]*
    Open the file at <path> and write one or more strings
    to it with write(2)