musl/src/unistd/dup2.c

#include <unistd.h>
#include <errno.h>
#include "syscall.h"

int dup2(int old, int new)
{
	int r;
	while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);
	return __syscall_ret(r);
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include <unistd.h>`
workaround bug in linux dup2 the linux documentation for dup2 says it can fail with EBUSY due to a race condition with open and dup in the kernel. shield applications (and the rest of libc) from this nonsense by looping until it succeeds 2011-04-20 21:05:10 -04:00			`#include <errno.h>`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include "syscall.h"`

			`int dup2(int old, int new)`
			`{`
workaround bug in linux dup2 the linux documentation for dup2 says it can fail with EBUSY due to a race condition with open and dup in the kernel. shield applications (and the rest of libc) from this nonsense by looping until it succeeds 2011-04-20 21:05:10 -04:00			`int r;`
			`while ((r=__syscall(SYS_dup2, old, new))==-EBUSY);`
			`return __syscall_ret(r);`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`}`