Jim,
i have an odd issue with NSTask. for some reason, no matter what
result code
my executable returns (im running xcodebuild, if that matters),
NSTask's
terminationStatus always reports back as 1. if instead i use
system() to run
the exact same command, i get bak proper error codes (0 for
success., other
non-zero, non-one values for real failures.
anyone have any ideas what could be going wrong to cause this?
You'll have to show your code. NSTask correctly returns the exit code
(see below).
got it: i had been staring at this for hours, but when i pasted it
here, it jumped at m right away: i accidentally passed the executable
name as first item in the argument array. what threw me off is that
according tot he console output, it seems that xcodebuild (which
happens to be what i was running) does the build just fine, so i could
not easily yell it was failing, compared to running it with system() -
the output looked (close to) identical, down to the final "BULD
SCUCCEEDED".
ftr, the code i was using is this. passing in the appropriate subarray
of params fixed it. so thanx!
NSArray *split = [command componentsSeparatedByString:@" "];
NSMutableArray *params = [NSMutableArray arrayWithCapacity:[split
count]];
for (NSString *s in split)
{
s = [s stringByTrimmingCharactersInSet:[NSCharacterSet
whitespaceCharacterSet]];
if ([s length] > 0) [params addObject:s];
}
NSTask *t = [[[NSTask alloc] init] autorelease];
[t setLaunchPath:[split objectAtIndex:0]];
[t setArguments:params]; // oops. first element should not be here!
[t setStandardOutput:[NSPipe pipe]];
[t launch];
NSFileHandle *stdOut = [[t standardOutput] fileHandleForReading];
NSMutableData *outputData = nil;
while ([t isRunning])
{
NSData *d = [stdOut availableData];
if (d)
{
if (outputData) [outputData appendData:d];
else outputData = [[d mutableCopy] autorelease];
}
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate date]];
}
if (outputData)
{
NSString *s = [[[NSString alloc] initWithData:outputData
encoding:NSUTF8StringEncoding] autorelease];
[output setArray:[s componentsSeparatedByString:@"\n"]];
}
[t waitUntilExit];
int result = [t terminationStatus];
//int result = system([command
cStringUsingEncoding:NSUTF8StringEncoding]);
if (result)
{
self.error = [NSString stringWithFormat:@"Execution of \"%...@\" failed
with error code %d.", [split objectAtIndex:0], result];
return NO;
}
return YES;
thanx,
marc
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