1 files changed, 150 insertions, 0 deletions
diff --git a/coregrind/m_ume/script.c b/coregrind/m_ume/script.c
new file mode 100644
index 0000000..8df563e
--- /dev/null
+++ b/coregrind/m_ume/script.c
@@ -0,0 +1,150 @@
+
+/*--------------------------------------------------------------------*/
+/*--- User-mode execve() for #! scripts.            m_ume_script.c ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+   This file is part of Valgrind, a dynamic binary instrumentation
+   framework.
+
+   Copyright (C) 2000-2009 Julian Seward 
+      jseward@acm.org
+
+   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 the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307, USA.
+
+   The GNU General Public License is contained in the file COPYING.
+*/
+
+#include "pub_core_basics.h"
+#include "pub_core_vki.h"
+
+#include "pub_core_libcbase.h"
+#include "pub_core_libcassert.h"  // VG_(exit), vg_assert
+#include "pub_core_libcfile.h"      // VG_(close) et al
+#include "pub_core_libcprint.h"
+#include "pub_core_mallocfree.h"    // VG_(strdup)
+#include "pub_core_ume.h"           // self
+
+#include "priv_ume.h"               // self
+
+
+#if defined(HAVE_SCRIPT)
+
+Bool VG_(match_script)(Char *hdr, Int len)
+{
+   Char* end    = hdr + len;
+   Char* interp = hdr + 2;
+
+   // len < 4: need '#', '!', plus at least a '/' and one more char
+   if (len < 4) return False;    
+   if (0 != VG_(memcmp)(hdr, "#!", 2)) return False;
+
+   // Find interpreter name, make sure it's an absolute path (starts with
+   // '/') and has at least one more char.  First, skip over any space
+   // between the #! and the start of the interpreter name
+   while (interp < end && VG_(isspace)(*interp)) interp++;
+
+   // overrun?
+   if (interp >= end)   return False;  // can't find start of interp name
+
+   // interp should now point at the /
+   if (*interp != '/')  return False;  // absolute path only for interpreter
+
+   // check for something plausible after the /
+   interp++;
+   if (interp >= end)   return False;
+   if (VG_(isspace)(*interp)) return False;
+
+   // Here we should get the full interpreter name and check it with
+   // check_executable().  See the "EXEC FAILED" failure when running shell
+   // for an example.
+
+   return True;   // looks like a #! script
+}
+
+
+/* returns: 0 = success, non-0 is failure */
+Int VG_(load_script)(Int fd, const HChar* name, ExeInfo* info)
+{
+   Char  hdr[4096];
+   Int   len = 4096;
+   Int   eol;
+   Char* interp;
+   Char* end;
+   Char* cp;
+   Char* arg = NULL;
+   SysRes res;
+
+   // Read the first part of the file.
+   res = VG_(pread)(fd, hdr, len, 0);
+   if (res.isError) {
+      VG_(close)(fd);
+      return VKI_EACCES;
+   } else {
+      len = res.res;
+   }
+
+   vg_assert('#' == hdr[0] && '!' == hdr[1]);
+
+   end    = hdr + len;
+   interp = hdr + 2;
+   while (interp < end && VG_(isspace)(*interp))
+      interp++;
+
+   vg_assert(*interp == '/');   /* absolute path only for interpreter */
+
+   /* skip over interpreter name */
+   for (cp = interp; cp < end && !VG_(isspace)(*cp); cp++)
+      ;
+
+   eol = (*cp == '\n');
+
+   *cp++ = '\0';
+
+   if (!eol && cp < end) {
+      /* skip space before arg */
+      while (cp < end && VG_(isspace)(*cp) && *cp != '\n')
+         cp++;
+
+      /* arg is from here to eol */
+      arg = cp;
+      while (cp < end && *cp != '\n')
+         cp++;
+      *cp = '\0';
+   }
+   
+   info->interp_name = VG_(strdup)("ume.ls.1", interp);
+   vg_assert(NULL != info->interp_name);
+   if (arg != NULL && *arg != '\0') {
+      info->interp_args = VG_(strdup)("ume.ls.2", arg);
+      vg_assert(NULL != info->interp_args);
+   }
+
+   if (info->argv && info->argv[0] != NULL)
+      info->argv[0] = (char *)name;
+
+   if (0)
+      VG_(printf)("#! script: interp_name=\"%s\" interp_args=\"%s\"\n",
+                  info->interp_name, info->interp_args);
+
+   return VG_(do_exec_inner)(interp, info);
+}
+
+#endif /* defined(HAVE_SCRIPT) */
+
+/*--------------------------------------------------------------------*/
+/*--- end                                                          ---*/
+/*--------------------------------------------------------------------*/