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88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
#ifndef __ACL_MASTER_PROTO_INCLUDE_H__
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#define __ACL_MASTER_PROTO_INCLUDE_H__
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#include "../stdlib/acl_define.h"
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#ifndef ACL_CLIENT_ONLY
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef ACL_UNIX
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/*
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* Well-known socket or FIFO directories. The main difference is in file
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* access permissions.
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*/
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#define ACL_MASTER_CLASS_PUBLIC "public"
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#define ACL_MASTER_CLASS_PRIVATE "private"
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/*
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* Generic triggers.
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*/
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#define ACL_TRIGGER_REQ_WAKEUP 'W' /* wakeup */
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/*
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* Transport names. The master passes the transport name on the command
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* line, and thus the name is part of the master to child protocol.
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*/
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#define ACL_MASTER_XPORT_NAME_UNIX "unix" /* local IPC */
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#define ACL_MASTER_XPORT_NAME_FIFO "fifo" /* local IPC */
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#define ACL_MASTER_XPORT_NAME_INET "inet" /* non-local IPC */
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#define ACL_MASTER_XPORT_NAME_SOCK "sock" /* inet/unix IPC */
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#define ACL_MASTER_XPORT_NAME_UDP "udp" /* udp IPC */
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/*#define ACL_MASTER_XPORT_NAME_PASS "pass" local IPC */
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/*
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* Format of a status message sent by a child process to the process
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* manager. Since this is between processes on the same machine we need not
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* worry about byte order and word length.
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*/
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typedef struct ACL_MASTER_STATUS {
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int pid; /* process ID */
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unsigned gen; /* child generation number */
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int status; /* availability */
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} ACL_MASTER_STATUS;
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#define ACL_MASTER_GEN_NAME "GENERATION" /* passed via environment */
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#define ACL_MASTER_STAT_TAKEN 0 /* this one is occupied */
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#define ACL_MASTER_STAT_AVAIL 1 /* this process is idle */
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#define ACL_MASTER_STAT_SIGHUP_OK 2
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#define ACL_MASTER_STAT_SIGHUP_ERR 3
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#define ACL_MASTER_STAT_START_OK 4
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#define ACL_MASTER_STAT_START_ERR 5
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int acl_master_notify(int, unsigned, int); /* encapsulate status msg */
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/*
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* File descriptors inherited from the master process. The flow control pipe
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* is read by receive processes and is written to by send processes. If
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* receive processes get too far ahead they will pause for a brief moment.
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*/
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#define ACL_MASTER_FLOW_READ 3
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#define ACL_MASTER_FLOW_WRITE 4
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/*
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* File descriptors inherited from the master process. All processes that
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* provide a given service share the same status file descriptor, and listen
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* on the same service socket(s). The kernel decides what process gets the
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* next connection. Usually the number of listening processes is small, so
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* one connection will not cause a "thundering herd" effect. When no process
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* listens on a given socket, the master process will. ACL_MASTER_LISTEN_FD is
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* actually the lowest-numbered descriptor of a sequence of descriptors to
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* listen on.
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*/
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#define ACL_MASTER_STATUS_FD 5 /* shared channel to parent */
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#define ACL_MASTER_LISTEN_FD 6 /* accept connections here */
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#endif /* ACL_UNIX */
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#ifdef __cplusplus
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}
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#endif
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#endif /* ACL_CLIENT_ONLY */
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#endif
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