diff options
| -rw-r--r-- | tools/lib/bpf/libbpf_internal.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf_internal.h b/tools/lib/bpf/libbpf_internal.h index 27e4e320e1a6..58c547d473e0 100644 --- a/tools/lib/bpf/libbpf_internal.h +++ b/tools/lib/bpf/libbpf_internal.h @@ -15,6 +15,7 @@ #include <linux/err.h> #include <fcntl.h> #include <unistd.h> +#include <sys/syscall.h> #include <libelf.h> #include "relo_core.h" @@ -555,6 +556,15 @@ static inline int ensure_good_fd(int fd) return fd; } +static inline int sys_dup2(int oldfd, int newfd) +{ +#ifdef __NR_dup2 + return syscall(__NR_dup2, oldfd, newfd); +#else + return syscall(__NR_dup3, oldfd, newfd, 0); +#endif +} + /* Point *fixed_fd* to the same file that *tmp_fd* points to. * Regardless of success, *tmp_fd* is closed. * Whatever *fixed_fd* pointed to is closed silently. @@ -563,7 +573,7 @@ static inline int reuse_fd(int fixed_fd, int tmp_fd) { int err; - err = dup2(tmp_fd, fixed_fd); + err = sys_dup2(tmp_fd, fixed_fd); err = err < 0 ? -errno : 0; close(tmp_fd); /* clean up temporary FD */ return err; |