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tools lib api fs: Add sysfs__read_xll function 

Adding sysfs__read_xll function to be able to read sysfs files with hex
numbers in, which do not have 0x prefix.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180206181813.10943-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2018-02-06 19:18:01 +01:00 committed by Arnaldo Carvalho de Melo
parent 6baddfc690
commit d9c5f32240
2 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
tools/lib/api/fs/fs.c
View File

@ -432,7 +432,8 @@ int procfs__read_str(const char *entry, char **buf, size_t *sizep)
return filename__read_str(path, buf, sizep);
}
int sysfs__read_ull(const char *entry, unsigned long long *value)
static int sysfs__read_ull_base(const char *entry,
unsigned long long *value, int base)
{
char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
@ -442,7 +443,17 @@ int sysfs__read_ull(const char *entry, unsigned long long *value)
snprintf(path, sizeof(path), "%s/%s", sysfs, entry);
return filename__read_ull(path, value);
return filename__read_ull_base(path, value, base);
}
int sysfs__read_xll(const char *entry, unsigned long long *value)
{
return sysfs__read_ull_base(entry, value, 16);
}
int sysfs__read_ull(const char *entry, unsigned long long *value)
{
return sysfs__read_ull_base(entry, value, 0);
}
int sysfs__read_int(const char *entry, int *value)

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

@ -40,6 +40,7 @@ int procfs__read_str(const char *entry, char **buf, size_t *sizep);
int sysctl__read_int(const char *sysctl, int *value);
int sysfs__read_int(const char *entry, int *value);
int sysfs__read_ull(const char *entry, unsigned long long *value);
int sysfs__read_xll(const char *entry, unsigned long long *value);
int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
int sysfs__read_bool(const char *entry, bool *value);