Commit-ID: 51c0396c600f49de9c3ff8f6fd83055de3709c3d Gitweb: http://git.kernel.org/tip/51c0396c600f49de9c3ff8f6fd83055de3709c3d Author: Jiri Olsa <[email protected]> AuthorDate: Sun, 14 Feb 2016 17:03:44 +0100 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Tue, 16 Feb 2016 17:12:57 -0300
tools lib api fs: Add sysfs__read_str function Adding sysfs__read_str function to ease up reading string files from sysfs. New interface is: int sysfs__read_str(const char *entry, char **buf, size_t *sizep); Signed-off-by: Jiri Olsa <[email protected]> Cc: David Ahern <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/lib/api/fs/fs.c | 13 +++++++++++++ tools/lib/api/fs/fs.h | 1 + 2 files changed, 14 insertions(+) diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index 2cbf677..ef78c22 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -377,6 +377,19 @@ int sysfs__read_int(const char *entry, int *value) return filename__read_int(path, value); } +int sysfs__read_str(const char *entry, char **buf, size_t *sizep) +{ + char path[PATH_MAX]; + const char *sysfs = sysfs__mountpoint(); + + if (!sysfs) + return -1; + + snprintf(path, sizeof(path), "%s/%s", sysfs, entry); + + return filename__read_str(path, buf, sizep); +} + int sysctl__read_int(const char *sysctl, int *value) { char path[PATH_MAX]; diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h index 858922b..9f65980 100644 --- a/tools/lib/api/fs/fs.h +++ b/tools/lib/api/fs/fs.h @@ -32,4 +32,5 @@ int filename__read_str(const char *filename, 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_str(const char *entry, char **buf, size_t *sizep); #endif /* __API_FS__ */
