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--- ./newlib/libc/sys/psp/pspcwd.c.orig 2012-01-25 19:33:12.000000000 +0000
+++ ./newlib/libc/sys/psp/pspcwd.c 2012-01-25 19:33:12.000000000 +0000
@@ -0,0 +1,166 @@
+/*
+ * PSP Software Development Kit - http://www.pspdev.org
+ * -----------------------------------------------------------------------
+ * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
+ *
+ * pspcwd.c - Current working directory emulation helper functions
+ *
+ * Copyright (c) 2005 Marcus R. Brown <mrbrown@ocgnet.org>
+ * Copyright (c) 2005 James Forshaw <tyranid@gmail.com>
+ * Copyright (c) 2005 John Kelley <ps2dev@kelley.ca>
+ * Copyright (c) 2005 Jim Paris <jim@jtan.com>
+ *
+ */
+#include <string.h>
+#include <sys/types.h>
+#include <sys/unistd.h>
+
+#include <psptypes.h>
+#include <pspiofilemgr.h>
+
+char __psp_cwd[MAXPATHLEN + 1] = { 0 };
+
+/* Set the current working directory (CWD) to the path where the module was launched. */
+void __psp_init_cwd(char *argv_0)
+{
+ if (argv_0 != NULL) {
+ char base_path[MAXPATHLEN + 1];
+ char *end;
+
+ strncpy(base_path, argv_0, sizeof(base_path) - 1);
+ base_path[sizeof(base_path) - 1] = '\0';
+ end = strrchr(base_path, '/');
+ if (end != NULL) {
+ *(end + 1) = '\0';
+ chdir(base_path);
+ }
+ }
+}
+
+/* Return the number of bytes taken up by the "drive:" prefix,
+ or -1 if it's not found */
+int __psp_get_drive(const char *d)
+{
+ int i;
+ for(i=0; d[i]; i++) {
+ if(! ((d[i] >= 'a' && d[i] <= 'z') ||
+ (d[i] >= '0' && d[i] <= '9') ))
+ break;
+ }
+ if(d[i] == ':') return i+1;
+ return -1;
+}
+
+/* Like strcpy, but returns 0 if the string doesn't fit */
+int __psp_safe_strcpy(char *out, const char *in, int maxlen)
+{
+ for( ; maxlen > 0 && *in ; maxlen-- )
+ *(out++) = *(in++);
+ if(maxlen < 1) return 0;
+ *out = 0;
+ return 1;
+}
+
+/* Like strcat, but returns 0 if the string doesn't fit */
+int __psp_safe_strcat(char *out, const char *in, int maxlen)
+{
+ for( ; *out ; out++,maxlen-- )
+ continue;
+ return __psp_safe_strcpy(out, in, maxlen);
+}
+
+/* Normalize a pathname (without leading "drive:") by removing
+ . and .. components, duplicated /, etc. */
+int __psp_path_normalize(char *out, int len)
+{
+ int i, j;
+ int first, next;
+
+ /* First append "/" to make the rest easier */
+ if(!__psp_safe_strcat(out,"/",len)) return -10;
+
+ /* Convert "//" to "/" */
+ for(i=0; out[i+1]; i++) {
+ if(out[i]=='/' && out[i+1]=='/') {
+ for(j=i+1; out[j]; j++)
+ out[j] = out[j+1];
+ i--;
+ }
+ }
+
+ /* Convert "/./" to "/" */
+ for(i=0; out[i] && out[i+1] && out[i+2]; i++) {
+ if(out[i]=='/' && out[i+1]=='.' && out[i+2]=='/') {
+ for(j=i+1; out[j]; j++)
+ out[j] = out[j+2];
+ i--;
+ }
+ }
+
+ /* Convert "/asdf/../" to "/" until we can't anymore. Also
+ * convert leading "/../" to "/" */
+ first = next = 0;
+ while(1) {
+ /* If a "../" follows, remove it and the parent */
+ if(out[next+1] && out[next+1]=='.' &&
+ out[next+2] && out[next+2]=='.' &&
+ out[next+3] && out[next+3]=='/') {
+ for(j=0; out[first+j+1]; j++)
+ out[first+j+1] = out[next+j+4];
+ first = next = 0;
+ continue;
+ }
+
+ /* Find next slash */
+ first = next;
+ for(next=first+1; out[next] && out[next] != '/'; next++)
+ continue;
+ if(!out[next]) break;
+ }
+
+ /* Remove trailing "/" */
+ for(i=1; out[i]; i++)
+ continue;
+ if(i >= 1 && out[i-1] == '/')
+ out[i-1] = 0;
+
+ return 0;
+}
+
+/* Convert relative path to absolute path. */
+int __psp_path_absolute(const char *in, char *out, int len)
+{
+ int dr;
+
+ /* See what the relative URL starts with */
+ dr = __psp_get_drive(in);
+ if(dr > 0 && in[dr] == '/') {
+ /* It starts with "drive:/", so it's already absolute */
+ if(!__psp_safe_strcpy(out, in, len))
+ return -1;
+ } else if(in[0] == '/') {
+ /* It's absolute, but missing the drive, so use cwd's drive */
+ if(strlen(__psp_cwd) >= len)
+ return -2;
+ strcpy(out, __psp_cwd);
+ dr = __psp_get_drive(out);
+ out[dr] = 0;
+ if(!__psp_safe_strcat(out, in, len))
+ return -3;
+ } else {
+ /* It's not absolute, so append it to the current cwd */
+ if(strlen(__psp_cwd) >= len)
+ return -4;
+ strcpy(out, __psp_cwd);
+ if(!__psp_safe_strcat(out, "/", len))
+ return -6;
+ if(!__psp_safe_strcat(out, in, len))
+ return -7;
+ }
+
+ /* Now normalize the pathname portion */
+ dr = __psp_get_drive(out);
+ if(dr < 0) dr = 0;
+ return __psp_path_normalize(out + dr, len - dr);
+}
+
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