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103 lines
2.0 KiB
Objective-C
103 lines
2.0 KiB
Objective-C
//
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// ChildMonitor.m
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// 2Term
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//
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// Created by Kelvin Sherlock on 1/16/2011.
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// Copyright 2011 __MyCompanyName__. All rights reserved.
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//
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#import "ChildMonitor.h"
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#include <sys/wait.h>
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#include <sys/select.h>
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#include <signal.h>
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@implementation ChildMonitor
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@synthesize childFinished = _childFinished;
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@synthesize childStatus = _childStatus;
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@synthesize childPID = _childPID;
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@synthesize fd = _fd;
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@synthesize delegate = _delegate;
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-(BOOL)wait
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{
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int status = 0;
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if (waitpid(_childPID, &status, WNOHANG) == _childPID)
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{
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[self setChildStatus: status];
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[self setChildFinished: YES];
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[(NSObject *)_delegate performSelectorOnMainThread: @selector(childFinished:)
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withObject: self
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waitUntilDone: NO];
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return YES;
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}
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return NO;
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}
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-(void)main
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{
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int fd = _fd;
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// poll(2) does not work for ptys.
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// todo -- check if kqueue works with ptys
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// kqueue can also monitor the child process.
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for(;;)
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{
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int n;
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struct timeval tm;
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fd_set read_set;
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fd_set error_set;
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if ([self isCancelled]) break;
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FD_ZERO(&read_set);
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FD_SET(fd, &read_set);
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FD_ZERO(&error_set);
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FD_SET(fd, &error_set);
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// 10 second timeout...
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tm.tv_sec = 10;
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tm.tv_usec = 0;
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n = select(fd + 1, &read_set, NULL, &error_set, &tm);
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if (n == 0) continue;
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if (n < 0) break;
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if (FD_ISSET(fd, &error_set)) break;
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// ?
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if (FD_ISSET(fd, &read_set))
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{
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[_delegate childDataAvailable: self];
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}
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if ([self wait]) break;
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}
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if (!_childFinished) [self wait];
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}
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- (void)dealloc {
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if (!_childFinished) kill(_childPID, 9);
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[super dealloc];
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}
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@end
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