Re: [PATCH i-g-t 04/13] lib/igt_aux: Make procps optional

[Jani Nikula <jani.nikula@linux.intel.com>]

On Wed, 19 Apr 2017, Arkadiusz Hiler <arkadiusz.hiler@intel.com> wrote:
> Android does not have procps and it's not easy to compile it as a
> dependency.
>
> We can provide alternative, "naive" implementation that just shells out
> to external commands (i.e. pkill and lsof) in case we do not have the
> library.
>
> Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
> ---
>  configure.ac  |  6 +++++-
>  lib/igt_aux.c | 24 +++++++++++++++++++++---
>  2 files changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index 12b0ab0..a5a92d5 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -123,7 +123,11 @@ AC_SUBST(ASSEMBLER_WARN_CFLAGS)
>  PKG_CHECK_MODULES(DRM, [libdrm])
>  PKG_CHECK_MODULES(PCIACCESS, [pciaccess >= 0.10])
>  PKG_CHECK_MODULES(KMOD, [libkmod])
> -PKG_CHECK_MODULES(PROCPS, [libprocps])
> +PKG_CHECK_MODULES(PROCPS, [libprocps], [procps=yes], [procps=no])
> +AM_CONDITIONAL(HAVE_PROCPS, [test "x$procps" = xyes])
> +if test x"$procps" = xyes; then
> +	AC_DEFINE(HAVE_PROCPS,1,[Enable process managment without shelling out])
> +fi
>  PKG_CHECK_MODULES(VALGRIND, [valgrind], [have_valgrind=yes], [have_valgrind=no])
>  
>  if test x$have_valgrind = xyes; then
> diff --git a/lib/igt_aux.c b/lib/igt_aux.c
> index 2ec6b78..4efb45b 100644
> --- a/lib/igt_aux.c
> +++ b/lib/igt_aux.c
> @@ -50,9 +50,7 @@
>  #include <sys/utsname.h>
>  #include <termios.h>
>  #include <assert.h>
> -
> -#include <proc/readproc.h>
> -
> +#include <linux/limits.h>
>  #include "drmtest.h"
>  #include "i915_drm.h"
>  #include "intel_chipset.h"
> @@ -71,6 +69,10 @@
>  #include <libgen.h>   /* for dirname() */
>  #endif
>  
> +#ifdef HAVE_PROCPS
> +#include <proc/readproc.h>
> +#endif
> +
>  /**
>   * SECTION:igt_aux
>   * @short_description: Auxiliary libraries and support functions
> @@ -1295,6 +1297,7 @@ void igt_set_module_param_int(const char *name, int val)
>   */
>  int igt_terminate_process(int sig, const char *comm)
>  {
> +#ifdef HAVE_PROCPS

Please move ifdefs *outside* the functions, and add another function for
the !HAVE_PROCPS branch.

Same below.

BR,
Jani.

>  	PROCTAB *proc;
>  	proc_t *proc_info;
>  	int err = 0;
> @@ -1316,6 +1319,12 @@ int igt_terminate_process(int sig, const char *comm)
>  
>  	closeproc(proc);
>  	return err;
> +#else
> +#warning "No procps, using naive implementation of igt_terminate_process"
> +	char pkill_cmd[NAME_MAX];
> +	snprintf(pkill_cmd, sizeof(pkill_cmd), "pkill -x -%d %s", sig, comm);
> +	return system(pkill_cmd);
> +#endif
>  }
>  
>  struct pinfo {
> @@ -1324,6 +1333,7 @@ struct pinfo {
>  	const char *fn;
>  };
>  
> +#ifdef HAVE_PROCPS
>  static void
>  __igt_show_stat(struct pinfo *info)
>  {
> @@ -1499,6 +1509,7 @@ __igt_lsof(const char *dir)
>  
>  	closeproc(proc);
>  }
> +#endif
>  
>  /**
>   * igt_lsof: Lists information about files opened by processes.
> @@ -1510,6 +1521,7 @@ __igt_lsof(const char *dir)
>  void
>  igt_lsof(const char *dpath)
>  {
> +#ifdef HAVE_PROCPS
>  	struct stat st;
>  	size_t len = strlen(dpath);
>  	char *sanitized;
> @@ -1530,6 +1542,12 @@ igt_lsof(const char *dpath)
>  	__igt_lsof(sanitized);
>  
>  	free(sanitized);
> +#else
> +#warning "No procps, using naive implementation of igt_lsof"
> +	char lsof_cmd[NAME_MAX];
> +	snprintf(lsof_cmd, sizeof(lsof_cmd), "lsof +d %s", dpath);
> +	system(lsof_cmd);
> +#endif
>  }
>  
>  static struct igt_siglatency {

-- 
Jani Nikula, Intel Open Source Technology Center
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