103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
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/*
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* ngIRCd -- The Next Generation IRC Daemon
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* Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* Please read the file COPYING, README and AUTHORS for more information.
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*
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* Process management
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*/
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#include "portab.h"
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#include "imp.h"
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include "log.h"
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#include "io.h"
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#include "exp.h"
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#include "proc.h"
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/**
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* Initialize process structure.
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*/
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GLOBAL void
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Proc_InitStruct (PROC_STAT *proc)
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{
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assert(proc != NULL);
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proc->pid = 0;
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proc->pipe_fd = -1;
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}
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/**
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* Fork a child process.
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*/
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GLOBAL pid_t
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Proc_Fork(PROC_STAT *proc, int *pipefds, void (*cbfunc)(int, short))
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{
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pid_t pid;
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assert(proc != NULL);
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assert(pipefds != NULL);
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assert(cbfunc != NULL);
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if (pipe(pipefds) != 0) {
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Log(LOG_ALERT, "Can't create output pipe for child process: %s!",
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strerror(errno));
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return -1;
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}
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pid = fork();
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switch (pid) {
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case -1:
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/* Error on fork: */
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Log(LOG_CRIT, "Can't fork child process: %s!", strerror(errno));
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close(pipefds[0]);
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close(pipefds[1]);
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return -1;
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case 0:
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/* New child process: */
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close(pipefds[0]);
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return 0;
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}
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/* Old parent process: */
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close(pipefds[1]);
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if (!io_setnonblock(pipefds[0])
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|| !io_event_create(pipefds[0], IO_WANTREAD, cbfunc)) {
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Log(LOG_CRIT, "Can't register callback for child process: %s!",
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strerror(errno));
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close(pipefds[0]);
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return -1;
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}
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proc->pid = pid;
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proc->pipe_fd = pipefds[0];
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return pid;
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}
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/**
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* Kill forked child process.
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*/
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GLOBAL void
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Proc_Kill(PROC_STAT *proc)
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{
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assert(proc != NULL);
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assert(proc->pipe_fd >= 0);
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io_close(proc->pipe_fd);
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kill(proc->pid, SIGTERM);
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Proc_InitStruct(proc);
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}
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/* -eof- */
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