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re PR libgcj/23758 (java::lang::ConcreteProcess::nativeSpawn unsafe)

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PR libgcj/23758
	* java/lang/natPosixProcess.cc (nativeSpawn): Move building of
	environment before the fork.
	* testsuite/libjava.lang/Process_7.java: New test.
	* testsuite/libjava.lang/Process_7.out: Its expected results.
	* testsuite/libjava.lang/Process_7.jar: Generated file.

From-SVN: r123676
This commit is contained in:
David Daney 2007-04-09 17:40:20 +00:00 • committed by David Daney
parent 22931aa4a9
commit 290b7f64b5
5 changed files with 105 additions and 30 deletions
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80
libjava/java/lang/natPosixProcess.cc
View file

@ -1,6 +1,7 @@
// natPosixProcess.cc - Native side of POSIX process code.
/* Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation
/* Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation
This file is part of libgcj.
@ -248,16 +249,57 @@ java::lang::PosixProcess::nativeSpawn ()
if (envp)
{
env = (char **) _Jv_Malloc ((envp->length + 1) * sizeof (char *));
bool need_path = true;
bool need_ld_library_path = true;
int i;
// Preserve PATH and LD_LIBRARY_PATH unless specified
// explicitly. We need three extra slots. Potentially PATH
// and LD_LIBRARY_PATH will be added plus the NULL
// termination.
env = (char **) _Jv_Malloc ((envp->length + 3) * sizeof (char *));
elts = elements (envp);
// Initialize so we can gracefully recover.
for (int i = 0; i <= envp->length; ++i)
for (i = 0; i < envp->length + 3; ++i)
env[i] = NULL;
for (int i = 0; i < envp->length; ++i)
env[i] = new_string (elts[i]);
env[envp->length] = NULL;
for (i = 0; i < envp->length; ++i)
{
env[i] = new_string (elts[i]);
if (!strncmp (env[i], "PATH=", sizeof("PATH=")))
need_path = false;
if (!strncmp (env[i], "LD_LIBRARY_PATH=",
sizeof("LD_LIBRARY_PATH=")))
need_ld_library_path = false;
}
if (need_path)
{
char *path_val = getenv ("PATH");
if (path_val)
{
env[i] = (char *) _Jv_Malloc (strlen (path_val) +
sizeof("PATH=") + 1);
strcpy (env[i], "PATH=");
strcat (env[i], path_val);
i++;
}
}
if (need_ld_library_path)
{
char *path_val = getenv ("LD_LIBRARY_PATH");
if (path_val)
{
env[i] =
(char *) _Jv_Malloc (strlen (path_val) +
sizeof("LD_LIBRARY_PATH=") + 1);
strcpy (env[i], "LD_LIBRARY_PATH=");
strcat (env[i], path_val);
i++;
}
}
env[i] = NULL;
}
// We allocate this here because we can't call malloc() after
@ -303,29 +345,7 @@ java::lang::PosixProcess::nativeSpawn ()
{
// Child process, so remap descriptors, chdir and exec.
if (envp)
{
// Preserve PATH and LD_LIBRARY_PATH unless specified
// explicitly.
char *path_val = getenv ("PATH");
char *ld_path_val = getenv ("LD_LIBRARY_PATH");
environ = env;
if (path_val && getenv ("PATH") == NULL)
{
char *path_env =
(char *) _Jv_Malloc (strlen (path_val) + 5 + 1);
strcpy (path_env, "PATH=");
strcat (path_env, path_val);
putenv (path_env);
}
if (ld_path_val && getenv ("LD_LIBRARY_PATH") == NULL)
{
char *ld_path_env =
(char *) _Jv_Malloc (strlen (ld_path_val) + 16 + 1);
strcpy (ld_path_env, "LD_LIBRARY_PATH=");
strcat (ld_path_env, ld_path_val);
putenv (ld_path_env);
}
}
environ = env;
// We ignore errors from dup2 because they should never occur.
dup2 (outp[0], 0);
@ -344,7 +364,7 @@ java::lang::PosixProcess::nativeSpawn ()
close (outp[0]);
close (outp[1]);
close (msgp[0]);
// Change directory.
if (path != NULL)
{