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tools lib api fs tracing_path: Add scandir alphasort 

tracing_events__opendir() allows iteration over files in
<debugfs>/tracing/events but with an arbitrary sort order.

Add a scandir alternative where the results are alphabetically sorted.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xin Gao <gaoxin@cdjrlc.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: http://lore.kernel.org/lkml/20221114210723.2749751-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2022-11-14 13:07:16 -08:00 committed by Arnaldo Carvalho de Melo
parent fe13d43d07
commit 1504b6f97b
2 changed files with 17 additions and 0 deletions
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16
tools/lib/api/fs/tracing_path.c
View File

@ -113,6 +113,22 @@ DIR *tracing_events__opendir(void)
return dir;
}
int tracing_events__scandir_alphasort(struct dirent ***namelist)
{
char *path = get_tracing_file("events");
int ret;
if (!path) {
*namelist = NULL;
return 0;
}
ret = scandir(path, namelist, NULL, alphasort);
put_events_file(path);
return ret;
}
int tracing_path__strerror_open_tp(int err, char *buf, size_t size,
const char *sys, const char *name)
{

1
tools/lib/api/fs/tracing_path.h
View File

@ -6,6 +6,7 @@
#include <dirent.h>
DIR *tracing_events__opendir(void);
int tracing_events__scandir_alphasort(struct dirent ***namelist);
void tracing_path_set(const char *mountpoint);
const char *tracing_path_mount(void);