Re: [LTP] [PATCH v3] lib: tst_run_cmd: add tst_run_cmd() to exec specified program

[Wanlong Gao <gaowanlong@cn.fujitsu.com>]

On 06/27/2013 10:52 PM, Alexey Kodanev wrote:
> vfork() + execvp() specified program.
> 
> Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>

LGTM

Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>


> ---
>  include/test.h    |    9 +++++++++
>  lib/tst_run_cmd.c |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 61 insertions(+), 0 deletions(-)
>  create mode 100644 lib/tst_run_cmd.c
> 
> diff --git a/include/test.h b/include/test.h
> index e68ae60..ee3efc3 100644
> --- a/include/test.h
> +++ b/include/test.h
> @@ -206,6 +206,15 @@ int tst_get_path(const char *prog_name, char *buf, size_t buf_len);
>  long tst_ncpus(void);
>  long tst_ncpus_max(void);
>  
> +/* lib/tst_run_cmd.c
> + *
> + * vfork() + execvp() specified program.
> + * @argv: a list of two (at least program name + NULL) or more pointers that
> + * represent the argument list to the new program. The array of pointers
> + * must be terminated by a NULL pointer.
> + */
> +void tst_run_cmd(void (cleanup_fn)(void), char *const argv[]);
> +
>  #ifdef TST_USE_COMPAT16_SYSCALL
>  #define TCID_BIT_SUFFIX "_16"
>  #elif  TST_USE_NEWER64_SYSCALL
> diff --git a/lib/tst_run_cmd.c b/lib/tst_run_cmd.c
> new file mode 100644
> index 0000000..93fe2d6
> --- /dev/null
> +++ b/lib/tst_run_cmd.c
> @@ -0,0 +1,52 @@
> +/*
> + * Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it would be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write the Free Software Foundation,
> + * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> + *
> + * Author: Alexey Kodanev <alexey.kodanev@oracle.com>
> + *
> + */
> +
> +#include <sys/types.h>
> +#include <sys/wait.h>
> +#include <unistd.h>
> +#include "test.h"
> +
> +void tst_run_cmd(void (cleanup_fn)(void), char *const argv[])
> +{
> +	if (argv == NULL || argv[0] == NULL) {
> +		tst_brkm(TBROK, cleanup_fn,
> +			"argument list is empty at %s:%d", __FILE__, __LINE__);
> +	}
> +
> +	pid_t pid = vfork();
> +	if (pid == -1) {
> +		tst_brkm(TBROK | TERRNO, cleanup_fn, "vfork failed at %s:%d",
> +			__FILE__, __LINE__);
> +	}
> +	if (!pid)
> +		_exit(execvp(argv[0], argv));
> +
> +	int ret = -1;
> +	if (waitpid(pid, &ret, 0) != pid) {
> +		tst_brkm(TBROK, cleanup_fn, "waitpid failed at %s:%d",
> +			__FILE__, __LINE__);
> +	}
> +
> +	if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
> +		tst_brkm(TBROK, cleanup_fn, "failed to exec cmd '%s' at %s:%d",
> +			argv[0], __FILE__, __LINE__);
> +	}
> +}
> 


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