1 files changed, 37 insertions, 317 deletions

diff --git a/gl/strerror.c b/gl/strerror.c
index 46153abf..80a2f2ee 100644
--- a/gl/strerror.c
+++ b/gl/strerror.c
@@ -1,6 +1,6 @@
 /* strerror.c --- POSIX compatible system error routine
 
-   Copyright (C) 2007-2010 Free Software Foundation, Inc.
+   Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
    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
@@ -17,334 +17,54 @@
 
 #include <config.h>
 
+/* Specification.  */
 #include <string.h>
 
-#if REPLACE_STRERROR
-
-# include <errno.h>
-# include <stdio.h>
-
-# if GNULIB_defined_ESOCK /* native Windows platforms */
-#  if HAVE_WINSOCK2_H
-#   include <winsock2.h>
-#  endif
-# endif
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-# include "intprops.h"
+#include "intprops.h"
+#include "strerror-override.h"
+#include "verify.h"
 
 /* Use the system functions, not the gnulib overrides in this file.  */
-# undef sprintf
-
-# undef strerror
-# if ! HAVE_DECL_STRERROR
-#  define strerror(n) NULL
-# endif
+#undef sprintf
 
 char *
-rpl_strerror (int n)
+strerror (int n)
+#undef strerror
 {
-  char const *msg = NULL;
-  /* These error messages are taken from glibc/sysdeps/gnu/errlist.c.  */
-  switch (n)
-    {
-# if GNULIB_defined_ETXTBSY
-    case ETXTBSY:
-      msg = "Text file busy";
-      break;
-# endif
-
-# if GNULIB_defined_ESOCK /* native Windows platforms */
-    /* EWOULDBLOCK is the same as EAGAIN.  */
-    case EINPROGRESS:
-      msg = "Operation now in progress";
-      break;
-    case EALREADY:
-      msg = "Operation already in progress";
-      break;
-    case ENOTSOCK:
-      msg = "Socket operation on non-socket";
-      break;
-    case EDESTADDRREQ:
-      msg = "Destination address required";
-      break;
-    case EMSGSIZE:
-      msg = "Message too long";
-      break;
-    case EPROTOTYPE:
-      msg = "Protocol wrong type for socket";
-      break;
-    case ENOPROTOOPT:
-      msg = "Protocol not available";
-      break;
-    case EPROTONOSUPPORT:
-      msg = "Protocol not supported";
-      break;
-    case ESOCKTNOSUPPORT:
-      msg = "Socket type not supported";
-      break;
-    case EOPNOTSUPP:
-      msg = "Operation not supported";
-      break;
-    case EPFNOSUPPORT:
-      msg = "Protocol family not supported";
-      break;
-    case EAFNOSUPPORT:
-      msg = "Address family not supported by protocol";
-      break;
-    case EADDRINUSE:
-      msg = "Address already in use";
-      break;
-    case EADDRNOTAVAIL:
-      msg = "Cannot assign requested address";
-      break;
-    case ENETDOWN:
-      msg = "Network is down";
-      break;
-    case ENETUNREACH:
-      msg = "Network is unreachable";
-      break;
-    case ENETRESET:
-      msg = "Network dropped connection on reset";
-      break;
-    case ECONNABORTED:
-      msg = "Software caused connection abort";
-      break;
-    case ECONNRESET:
-      msg = "Connection reset by peer";
-      break;
-    case ENOBUFS:
-      msg = "No buffer space available";
-      break;
-    case EISCONN:
-      msg = "Transport endpoint is already connected";
-      break;
-    case ENOTCONN:
-      msg = "Transport endpoint is not connected";
-      break;
-    case ESHUTDOWN:
-      msg = "Cannot send after transport endpoint shutdown";
-      break;
-    case ETOOMANYREFS:
-      msg = "Too many references: cannot splice";
-      break;
-    case ETIMEDOUT:
-      msg = "Connection timed out";
-      break;
-    case ECONNREFUSED:
-      msg = "Connection refused";
-      break;
-    case ELOOP:
-      msg = "Too many levels of symbolic links";
-      break;
-    case EHOSTDOWN:
-      msg = "Host is down";
-      break;
-    case EHOSTUNREACH:
-      msg = "No route to host";
-      break;
-    case EPROCLIM:
-      msg = "Too many processes";
-      break;
-    case EUSERS:
-      msg = "Too many users";
-      break;
-    case EDQUOT:
-      msg = "Disk quota exceeded";
-      break;
-    case ESTALE:
-      msg = "Stale NFS file handle";
-      break;
-    case EREMOTE:
-      msg = "Object is remote";
-      break;
-#  if HAVE_WINSOCK2_H
-    /* WSA_INVALID_HANDLE maps to EBADF */
-    /* WSA_NOT_ENOUGH_MEMORY maps to ENOMEM */
-    /* WSA_INVALID_PARAMETER maps to EINVAL */
-    case WSA_OPERATION_ABORTED:
-      msg = "Overlapped operation aborted";
-      break;
-    case WSA_IO_INCOMPLETE:
-      msg = "Overlapped I/O event object not in signaled state";
-      break;
-    case WSA_IO_PENDING:
-      msg = "Overlapped operations will complete later";
-      break;
-    /* WSAEINTR maps to EINTR */
-    /* WSAEBADF maps to EBADF */
-    /* WSAEACCES maps to EACCES */
-    /* WSAEFAULT maps to EFAULT */
-    /* WSAEINVAL maps to EINVAL */
-    /* WSAEMFILE maps to EMFILE */
-    /* WSAEWOULDBLOCK maps to EWOULDBLOCK */
-    /* WSAEINPROGRESS is EINPROGRESS */
-    /* WSAEALREADY is EALREADY */
-    /* WSAENOTSOCK is ENOTSOCK */
-    /* WSAEDESTADDRREQ is EDESTADDRREQ */
-    /* WSAEMSGSIZE is EMSGSIZE */
-    /* WSAEPROTOTYPE is EPROTOTYPE */
-    /* WSAENOPROTOOPT is ENOPROTOOPT */
-    /* WSAEPROTONOSUPPORT is EPROTONOSUPPORT */
-    /* WSAESOCKTNOSUPPORT is ESOCKTNOSUPPORT */
-    /* WSAEOPNOTSUPP is EOPNOTSUPP */
-    /* WSAEPFNOSUPPORT is EPFNOSUPPORT */
-    /* WSAEAFNOSUPPORT is EAFNOSUPPORT */
-    /* WSAEADDRINUSE is EADDRINUSE */
-    /* WSAEADDRNOTAVAIL is EADDRNOTAVAIL */
-    /* WSAENETDOWN is ENETDOWN */
-    /* WSAENETUNREACH is ENETUNREACH */
-    /* WSAENETRESET is ENETRESET */
-    /* WSAECONNABORTED is ECONNABORTED */
-    /* WSAECONNRESET is ECONNRESET */
-    /* WSAENOBUFS is ENOBUFS */
-    /* WSAEISCONN is EISCONN */
-    /* WSAENOTCONN is ENOTCONN */
-    /* WSAESHUTDOWN is ESHUTDOWN */
-    /* WSAETOOMANYREFS is ETOOMANYREFS */
-    /* WSAETIMEDOUT is ETIMEDOUT */
-    /* WSAECONNREFUSED is ECONNREFUSED */
-    /* WSAELOOP is ELOOP */
-    /* WSAENAMETOOLONG maps to ENAMETOOLONG */
-    /* WSAEHOSTDOWN is EHOSTDOWN */
-    /* WSAEHOSTUNREACH is EHOSTUNREACH */
-    /* WSAENOTEMPTY maps to ENOTEMPTY */
-    /* WSAEPROCLIM is EPROCLIM */
-    /* WSAEUSERS is EUSERS */
-    /* WSAEDQUOT is EDQUOT */
-    /* WSAESTALE is ESTALE */
-    /* WSAEREMOTE is EREMOTE */
-    case WSASYSNOTREADY:
-      msg = "Network subsystem is unavailable";
-      break;
-    case WSAVERNOTSUPPORTED:
-      msg = "Winsock.dll version out of range";
-      break;
-    case WSANOTINITIALISED:
-      msg = "Successful WSAStartup not yet performed";
-      break;
-    case WSAEDISCON:
-      msg = "Graceful shutdown in progress";
-      break;
-    case WSAENOMORE: case WSA_E_NO_MORE:
-      msg = "No more results";
-      break;
-    case WSAECANCELLED: case WSA_E_CANCELLED:
-      msg = "Call was canceled";
-      break;
-    case WSAEINVALIDPROCTABLE:
-      msg = "Procedure call table is invalid";
-      break;
-    case WSAEINVALIDPROVIDER:
-      msg = "Service provider is invalid";
-      break;
-    case WSAEPROVIDERFAILEDINIT:
-      msg = "Service provider failed to initialize";
-      break;
-    case WSASYSCALLFAILURE:
-      msg = "System call failure";
-      break;
-    case WSASERVICE_NOT_FOUND:
-      msg = "Service not found";
-      break;
-    case WSATYPE_NOT_FOUND:
-      msg = "Class type not found";
-      break;
-    case WSAEREFUSED:
-      msg = "Database query was refused";
-      break;
-    case WSAHOST_NOT_FOUND:
-      msg = "Host not found";
-      break;
-    case WSATRY_AGAIN:
-      msg = "Nonauthoritative host not found";
-      break;
-    case WSANO_RECOVERY:
-      msg = "Nonrecoverable error";
-      break;
-    case WSANO_DATA:
-      msg = "Valid name, no data record of requested type";
-      break;
-    /* WSA_QOS_* omitted */
-#  endif
-# endif
-
-# if GNULIB_defined_ENOMSG
-    case ENOMSG:
-      msg = "No message of desired type";
-      break;
-# endif
-
-# if GNULIB_defined_EIDRM
-    case EIDRM:
-      msg = "Identifier removed";
-      break;
-# endif
-
-# if GNULIB_defined_ENOLINK
-    case ENOLINK:
-      msg = "Link has been severed";
-      break;
-# endif
-
-# if GNULIB_defined_EPROTO
-    case EPROTO:
-      msg = "Protocol error";
-      break;
-# endif
-
-# if GNULIB_defined_EMULTIHOP
-    case EMULTIHOP:
-      msg = "Multihop attempted";
-      break;
-# endif
-
-# if GNULIB_defined_EBADMSG
-    case EBADMSG:
-      msg = "Bad message";
-      break;
-# endif
-
-# if GNULIB_defined_EOVERFLOW
-    case EOVERFLOW:
-      msg = "Value too large for defined data type";
-      break;
-# endif
-
-# if GNULIB_defined_ENOTSUP
-    case ENOTSUP:
-      msg = "Not supported";
-      break;
-# endif
-
-# if GNULIB_defined_ESTALE
-    case ESTALE:
-      msg = "Stale NFS file handle";
-      break;
-# endif
-
-# if GNULIB_defined_ECANCELED
-    case ECANCELED:
-      msg = "Operation canceled";
-      break;
-# endif
-    }
+  static char buf[STACKBUF_LEN];
+  size_t len;
 
+  /* Cast away const, due to the historical signature of strerror;
+     callers should not be modifying the string.  */
+  const char *msg = strerror_override (n);
   if (msg)
     return (char *) msg;
 
-  {
-    char *result = strerror (n);
+  msg = strerror (n);
 
-    if (result == NULL || result[0] == '\0')
-      {
-        static char const fmt[] = "Unknown error (%d)";
-        static char msg_buf[sizeof fmt + INT_STRLEN_BOUND (n)];
-        sprintf (msg_buf, fmt, n);
-        return msg_buf;
-      }
+  /* Our strerror_r implementation might use the system's strerror
+     buffer, so all other clients of strerror have to see the error
+     copied into a buffer that we manage.  This is not thread-safe,
+     even if the system strerror is, but portable programs shouldn't
+     be using strerror if they care about thread-safety.  */
+  if (!msg || !*msg)
+    {
+      static char const fmt[] = "Unknown error %d";
+      verify (sizeof buf >= sizeof (fmt) + INT_STRLEN_BOUND (n));
+      sprintf (buf, fmt, n);
+      errno = EINVAL;
+      return buf;
+    }
 
-    return result;
-  }
-}
+  /* Fix STACKBUF_LEN if this ever aborts.  */
+  len = strlen (msg);
+  if (sizeof buf <= len)
+    abort ();
 
-#endif
+  return memcpy (buf, msg, len + 1);
+}