114 lines
2.6 KiB
C++
114 lines
2.6 KiB
C++
/* child_info.h: shared child info for cygwin
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Copyright 2000, 2001, 2002 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include <setjmp.h>
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enum
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{
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_PROC_EXEC,
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_PROC_SPAWN,
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_PROC_FORK,
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_PROC_WHOOPS
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};
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#define OPROC_MAGIC_MASK 0xff00ff00
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#define OPROC_MAGIC_GENERIC 0xaf00f000
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#define PROC_MAGIC_GENERIC 0xaf00fa00
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#define PROC_EXEC (_PROC_EXEC)
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#define PROC_SPAWN (_PROC_SPAWN)
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#define PROC_FORK (_PROC_FORK)
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#define EXEC_MAGIC_SIZE sizeof(child_info)
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#define CURR_CHILD_INFO_MAGIC 0x8e0899faU
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/* NOTE: Do not make gratuitous changes to the names or organization of the
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below class. The layout is checksummed to determine compatibility between
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different cygwin versions. */
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class child_info
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{
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public:
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DWORD zero[4]; // must be zeroed
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DWORD cb; // size of this record
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DWORD intro; // improbable string
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unsigned long magic; // magic number unique to child_info
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unsigned short type; // type of record, exec, spawn, fork
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int cygpid; // cygwin pid of child process
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HANDLE subproc_ready; // used for synchronization with parent
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HANDLE mount_h;
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HANDLE parent;
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HANDLE pppid_handle;
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init_cygheap *cygheap;
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void *cygheap_max;
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HANDLE cygheap_h;
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unsigned fhandler_union_cb;
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};
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class mount_info;
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class _pinfo;
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class child_info_fork: public child_info
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{
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public:
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HANDLE forker_finished;// for synchronization with child
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DWORD stacksize; // size of parent stack
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jmp_buf jmp; // where child will jump to
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void *stacktop; // location of top of parent stack
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void *stackbottom; // location of bottom of parent stack
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};
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class fhandler_base;
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class cygheap_exec_info
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{
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public:
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char *old_title;
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int argc;
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char **argv;
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int envc;
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char **envp;
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HANDLE myself_pinfo;
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};
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class child_info_spawn: public child_info
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{
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public:
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cygheap_exec_info *moreinfo;
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HANDLE hexec_proc;
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child_info_spawn (): moreinfo (NULL) {}
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~child_info_spawn ()
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{
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if (parent)
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CloseHandle (parent);
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if (moreinfo)
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{
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if (moreinfo->old_title)
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cfree (moreinfo->old_title);
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if (moreinfo->envp)
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{
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for (char **e = moreinfo->envp; *e; e++)
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cfree (*e);
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cfree (moreinfo->envp);
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}
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CloseHandle (moreinfo->myself_pinfo);
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cfree (moreinfo);
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}
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}
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};
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void __stdcall init_child_info (DWORD, child_info *, int, HANDLE);
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extern child_info *child_proc_info;
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extern child_info_spawn *spawn_info __attribute__ ((alias ("child_proc_info")));
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extern child_info_fork *fork_info __attribute__ ((alias ("child_proc_info")));
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