diff options
| -rw-r--r-- | src/process/posix_spawn.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c index 0849c71f..93fb1555 100644 --- a/src/process/posix_spawn.c +++ b/src/process/posix_spawn.c @@ -27,12 +27,7 @@ static int __sys_dup2(int old, int new) #ifdef SYS_dup2 return __syscall(SYS_dup2, old, new); #else - if (old==new) { - int r = __syscall(SYS_fcntl, old, F_GETFD); - return r<0 ? r : old; - } else { - return __syscall(SYS_dup3, old, new, 0); - } + return __syscall(SYS_dup3, old, new, 0); #endif } @@ -109,8 +104,17 @@ static int child(void *args_vp) __syscall(SYS_close, op->fd); break; case FDOP_DUP2: - if ((ret=__sys_dup2(op->srcfd, op->fd))<0) - goto fail; + fd = op->srcfd; + if (fd != op->fd) { + if ((ret=__sys_dup2(fd, op->fd))<0) + goto fail; + } else { + ret = __syscall(SYS_fcntl, fd, F_GETFD); + ret = __syscall(SYS_fcntl, fd, F_SETFD, + ret & ~FD_CLOEXEC); + if (ret<0) + goto fail; + } break; case FDOP_OPEN: fd = __sys_open(op->path, op->oflag, op->mode); |