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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-10-19 19:14:08 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-12-07 11:27:01 -0300 |
| commit | 33ef940302eba1ecf9e98376557af75d7d9c0ed1 (patch) | |
| tree | dc5311765d93b4460a0bc65c9d7ae6ff6da81f50 /sysdeps/unix/sysv/linux | |
| parent | 1001abfa14d5289236dcca740ab72ec4d1fa5352 (diff) | |
| download | glibc-33ef940302eba1ecf9e98376557af75d7d9c0ed1.tar.gz glibc-33ef940302eba1ecf9e98376557af75d7d9c0ed1.tar.xz glibc-33ef940302eba1ecf9e98376557af75d7d9c0ed1.zip | |
Linux: consolidate dup2 implementation
Use dup2 syscall if defined, otherwise use dup3. Checked on x86_64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/dup2.c (renamed from sysdeps/unix/sysv/linux/generic/dup2.c) | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/dup2.c b/sysdeps/unix/sysv/linux/dup2.c index 0dc45e9b17..1182780e15 100644 --- a/sysdeps/unix/sysv/linux/generic/dup2.c +++ b/sysdeps/unix/sysv/linux/dup2.c @@ -1,4 +1,5 @@ -/* Copyright (C) 2011-2022 Free Software Foundation, Inc. +/* Duplicate a file descriptor. Linux version. + Copyright (C) 2011-2022 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -24,12 +25,16 @@ int __dup2 (int fd, int fd2) { +#ifdef __NR_dup2 + return INLINE_SYSCALL_CALL (dup2, fd, fd2); +#else /* For the degenerate case, check if the fd is valid (by trying to get the file status flags) and return it, or else return EBADF. */ if (fd == fd2) return __libc_fcntl (fd, F_GETFL, 0) < 0 ? -1 : fd; - return INLINE_SYSCALL (dup3, 3, fd, fd2, 0); + return INLINE_SYSCALL_CALL (dup3, fd, fd2, 0); +#endif } libc_hidden_def (__dup2) weak_alias (__dup2, dup2) |