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In Xcode you can type GDB commands in the debugger console. There you can reset the stdout and stderr file descriptors to your preferred log file like this

(gdb) call (void)close(1)
(gdb) call (void)close(2)
(gdb) call (int)open("/tmp/out.log", 0x201, 0644)
$1 = 1
(gdb) call (int)dup(1)
$2 = 2
(gdb) continue

nschmidt 2009-06-12 14:06:20

I finally decide use GDB console base on your useful information. i am not familiar with gdb commands .

2009-06-12 19:03:53

The "call" command lets you call a function in your running process.You could achieve the same effect by calling these functions directly in your executable, e.g. in your main function. These are just the standard unix file handling functions. The file descriptors are stdin = 0, stdout = 1, stderr = 2. That's why I close 1 and 2 and then open a new file that goes to the first free file descriptor , which is 1, because we just closed it. Then dup duplicates the file descriptor to the next free descriptor: 2.

nschmidt 2009-06-12 20:07:10

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