diff options
Diffstat (limited to 'src/unistd')
| -rw-r--r-- | src/unistd/dup3.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/unistd/dup3.c b/src/unistd/dup3.c index 18f6fcce..1f7134b3 100644 --- a/src/unistd/dup3.c +++ b/src/unistd/dup3.c @@ -1,10 +1,21 @@ #define _GNU_SOURCE #include <unistd.h> #include <errno.h> +#include <fcntl.h> #include "syscall.h" +#include "libc.h" -int dup3(int old, int new, int flags) { +int __dup3(int old, int new, int flags) +{ int r; - while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY); + if (old==new) return __syscall_ret(-EINVAL); + if (flags & O_CLOEXEC) { + while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY); + if (r!=-ENOSYS) return __syscall_ret(r); + } + while ((r=__syscall(SYS_dup2, old, new))==-EBUSY); + if (flags & O_CLOEXEC) __syscall(SYS_fcntl, new, F_SETFD, FD_CLOEXEC); return __syscall_ret(r); } + +weak_alias(__dup3, dup3); |