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support: Add xdup

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Add xdup as the error-checking version of dup for test cases.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Siddhesh Poyarekar 2024-11-08 12:33:47 -05:00
parent ab4388f91c
commit 04b1eb161f
3 changed files with 32 additions and 0 deletions
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1
support/Makefile
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@ -128,6 +128,7 @@ libsupport-routines = \
xcopy_file_range \
xdlfcn \
xdlmopen \
xdup \
xdup2 \
xfchmod \
xfclose \

30
support/xdup.c Normal file
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@ -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
<https://www.gnu.org/licenses/>. */
#include <support/xunistd.h>
#include <support/check.h>
int
xdup (int from)
{
int ret = dup (from);
if (ret < 0)
FAIL_EXIT1 ("dup (%d): %m", from);
return ret;
}

1
support/xunistd.h
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@ -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);