From 04b1eb161fdc8b88876bf78b34d2bb92584aba45 Mon Sep 17 00:00:00 2001 From: Siddhesh Poyarekar Date: Fri, 8 Nov 2024 12:33:47 -0500 Subject: [PATCH] support: Add xdup Add xdup as the error-checking version of dup for test cases. Signed-off-by: Siddhesh Poyarekar Reviewed-by: Adhemerval Zanella --- support/Makefile | 1 + support/xdup.c | 30 ++++++++++++++++++++++++++++++ support/xunistd.h | 1 + 3 files changed, 32 insertions(+) create mode 100644 support/xdup.c diff --git a/support/Makefile b/support/Makefile index 84e2419775..099f5ebb9c 100644 --- a/support/Makefile +++ b/support/Makefile @@ -128,6 +128,7 @@ libsupport-routines = \ xcopy_file_range \ xdlfcn \ xdlmopen \ + xdup \ xdup2 \ xfchmod \ xfclose \ diff --git a/support/xdup.c b/support/xdup.c new file mode 100644 index 0000000000..1eab317354 --- /dev/null +++ b/support/xdup.c @@ -0,0 +1,30 @@ +/* dup with error checking. + Copyright The GNU Toolchain Authors. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include + +int +xdup (int from) +{ + int ret = dup (from); + if (ret < 0) + FAIL_EXIT1 ("dup (%d): %m", from); + + return ret; +} diff --git a/support/xunistd.h b/support/xunistd.h index 204951bce7..0c6d837ac0 100644 --- a/support/xunistd.h +++ b/support/xunistd.h @@ -35,6 +35,7 @@ pid_t xfork (void); pid_t xwaitpid (pid_t, int *status, int flags); void xpipe (int[2]); void xdup2 (int, int); +int xdup (int); int xopen (const char *path, int flags, mode_t); void support_check_stat_fd (const char *name, int fd, int result); void support_check_stat_path (const char *name, const char *path, int result);