On 05/12/2011 08:57 AM, Jan Safranek wrote:
> Default target of log messages is stdout and WARNINGs and ERRORs are sent
> there by default.
>
> This is quite a change from the behavior of previous versions - no logging
> was sent anywhere unless --enable-debug was specified at ./configure time.
>
> Signed-off-by: Jan Safranek<[email protected]>
Acked-By: Ivana Hutarova Varekova <[email protected]>
> ---
>
> include/libcgroup/init.h | 4 ++++
> include/libcgroup/log.h | 2 ++
> src/api.c | 2 ++
> 3 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/include/libcgroup/init.h b/include/libcgroup/init.h
> index 3709096..44badd2 100644
> --- a/include/libcgroup/init.h
> +++ b/include/libcgroup/init.h
> @@ -35,6 +35,10 @@ __BEGIN_DECLS
> /**
> * Initialize libcgroup. Information about mounted hierarchies are examined
> * and cached internally (just what's mounted where, not the groups
> themselves).
> + *
> + * If the cgroup logging was not set using cgroup_set_logger() or
> + * cgroup_set_default_logger() before calling cgroup_init(), the default
> logger
> + * is automatically set.
> */
> int cgroup_init(void);
>
> diff --git a/include/libcgroup/log.h b/include/libcgroup/log.h
> index 10b1248..ff9ecf5 100644
> --- a/include/libcgroup/log.h
> +++ b/include/libcgroup/log.h
> @@ -29,6 +29,8 @@ __BEGIN_DECLS
> * @par
> * The logging callback can be set at any time, but setting the callback
> before
> * any other libcgroup function (including cgroup_init()) is highly
> recommended.
> + * If no logger is set before cgroup_init() is called, default logger is
> + * automatically set, logging CGROUP_LOG_WARNING and above messages to
> stdout.
> *
> * @par Setting log level
> * Some of the functions below set the log level as integer.
> diff --git a/src/api.c b/src/api.c
> index 53c76e8..babf4cb 100644
> --- a/src/api.c
> +++ b/src/api.c
> @@ -769,6 +769,8 @@ int cgroup_init(void)
> char mntent_buffer[4 * FILENAME_MAX];
> char *strtok_buffer = NULL;
>
> + cgroup_set_default_logger(-1);
> +
> pthread_rwlock_wrlock(&cg_mount_table_lock);
>
> proc_cgroup = fopen("/proc/cgroups", "re");
>
>
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What every C/C++ and Fortran developer should know.
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