org.apache.tomcat.jni

Class Procattr

public class Procattr extends Object

Procattr

Version: $Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (Tue, 24 Oct 2006) $

Author: Mladen Turk

Method Summary
static intaddrspaceSet(long attr, int addrspace)
Determine if the child should start in its own address space or using the current one from its parent
static intchildErrSet(long attr, long err, long parent)
Set the child_err and parent_err values to existing apr_file_t values.
static intchildInSet(long attr, long in, long parent)
Set the child_in and/or parent_in values to existing apr_file_t values.
static intchildOutSet(long attr, long out, long parent)
Set the child_out and parent_out values to existing apr_file_t values.
static intcmdtypeSet(long attr, int cmd)
Set what type of command the child process will call.
static longcreate(long cont)
Create and initialize a new procattr variable
static intdetachSet(long attr, int detach)
Determine if the child should start in detached state.
static intdirSet(long attr, String dir)
Set which directory the child process should start executing in.
static voiderrfnSet(long attr, long pool, Object o)
Specify an error function to be called in the child process if APR encounters an error in the child prior to running the specified program.
static interrorCheckSet(long attr, int chk)
Specify that apr_proc_create() should do whatever it can to report failures to the caller of apr_proc_create(), rather than find out in the child.
static intgroupSet(long attr, String groupname)
Set the group used for running process
static intioSet(long attr, int in, int out, int err)
Determine if any of stdin, stdout, or stderr should be linked to pipes when starting a child process.
static intuserSet(long attr, String username, String password)
Set the username used for running process

Method Detail

addrspaceSet

public static int addrspaceSet(long attr, int addrspace)
Determine if the child should start in its own address space or using the current one from its parent

Parameters: attr The procattr we care about. addrspace Should the child start in its own address space? Default is no on NetWare and yes on other platforms.

childErrSet

public static int childErrSet(long attr, long err, long parent)
Set the child_err and parent_err values to existing apr_file_t values.
This is NOT a required initializer function. This is useful if you have already opened a pipe (or multiple files) that you wish to use, perhaps persistently across multiple process invocations - such as a log file.

Parameters: attr The procattr we care about. err apr_file_t value to use as child_err. Must be a valid file. parent apr_file_t value to use as parent_err. Must be a valid file.

childInSet

public static int childInSet(long attr, long in, long parent)
Set the child_in and/or parent_in values to existing apr_file_t values.
This is NOT a required initializer function. This is useful if you have already opened a pipe (or multiple files) that you wish to use, perhaps persistently across multiple process invocations - such as a log file. You can save some extra function calls by not creating your own pipe since this creates one in the process space for you.

Parameters: attr The procattr we care about. in apr_file_t value to use as child_in. Must be a valid file. parent apr_file_t value to use as parent_in. Must be a valid file.

childOutSet

public static int childOutSet(long attr, long out, long parent)
Set the child_out and parent_out values to existing apr_file_t values.
This is NOT a required initializer function. This is useful if you have already opened a pipe (or multiple files) that you wish to use, perhaps persistently across multiple process invocations - such as a log file.

Parameters: attr The procattr we care about. out apr_file_t value to use as child_out. Must be a valid file. parent apr_file_t value to use as parent_out. Must be a valid file.

cmdtypeSet

public static int cmdtypeSet(long attr, int cmd)
Set what type of command the child process will call.

Parameters: attr The procattr we care about. cmd The type of command. One of:

 APR_SHELLCMD     --  Anything that the shell can handle
 APR_PROGRAM      --  Executable program   (default)
 APR_PROGRAM_ENV  --  Executable program, copy environment
 APR_PROGRAM_PATH --  Executable program on PATH, copy env
 

create

public static long create(long cont)
Create and initialize a new procattr variable

Parameters: cont The pool to use

Returns: The newly created procattr.

detachSet

public static int detachSet(long attr, int detach)
Determine if the child should start in detached state.

Parameters: attr The procattr we care about. detach Should the child start in detached state? Default is no.

dirSet

public static int dirSet(long attr, String dir)
Set which directory the child process should start executing in.

Parameters: attr The procattr we care about. dir Which dir to start in. By default, this is the same dir as the parent currently resides in, when the createprocess call is made.

errfnSet

public static void errfnSet(long attr, long pool, Object o)
Specify an error function to be called in the child process if APR encounters an error in the child prior to running the specified program.

Parameters: attr The procattr describing the child process to be created. pool The the pool to use. o The Object to call in the child process.
At the present time, it will only be called from apr_proc_create() on platforms where fork() is used. It will never be called on other platforms, on those platforms apr_proc_create() will return the error in the parent process rather than invoke the callback in the now-forked child process.

errorCheckSet

public static int errorCheckSet(long attr, int chk)
Specify that apr_proc_create() should do whatever it can to report failures to the caller of apr_proc_create(), rather than find out in the child.

Parameters: attr The procattr describing the child process to be created. chk Flag to indicate whether or not extra work should be done to try to report failures to the caller.
This flag only affects apr_proc_create() on platforms where fork() is used. This leads to extra overhead in the calling process, but that may help the application handle such errors more gracefully.

groupSet

public static int groupSet(long attr, String groupname)
Set the group used for running process

Parameters: attr The procattr we care about. groupname The group name used

ioSet

public static int ioSet(long attr, int in, int out, int err)
Determine if any of stdin, stdout, or stderr should be linked to pipes when starting a child process.

Parameters: attr The procattr we care about. in Should stdin be a pipe back to the parent? out Should stdout be a pipe back to the parent? err Should stderr be a pipe back to the parent?

userSet

public static int userSet(long attr, String username, String password)
Set the username used for running process

Parameters: attr The procattr we care about. username The username used password User password if needed. Password is needed on WIN32 or any other platform having APR_PROCATTR_USER_SET_REQUIRES_PASSWORD set.

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