diff options
| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-04-26 12:31:16 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-04-26 13:15:00 -0300 |
| commit | 4bd112df3eea4db63fe90fb4e83c48d3f3bd6512 (patch) | |
| tree | ec7db18635dd1db653271c0dd620af240e1384f4 /tools/lib/api | |
| parent | perf trace: Do not beautify the 'pid' parameter as a simple integer (diff) | |
| download | linux-dev-4bd112df3eea4db63fe90fb4e83c48d3f3bd6512.tar.xz linux-dev-4bd112df3eea4db63fe90fb4e83c48d3f3bd6512.zip | |
tools lib api fs: Add helper to read string from procfs file
To read things like /proc/self/comm.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ztpkbmseidt0hq2psr46o0h9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/api')
| -rw-r--r-- | tools/lib/api/fs/fs.c | 13 | ||||
| -rw-r--r-- | tools/lib/api/fs/fs.h | 2 |
2 files changed, 15 insertions, 0 deletions
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index ef78c22ff44d..08556cf2c70d 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -351,6 +351,19 @@ int filename__read_str(const char *filename, char **buf, size_t *sizep) return err; } +int procfs__read_str(const char *entry, char **buf, size_t *sizep) +{ + char path[PATH_MAX]; + const char *procfs = procfs__mountpoint(); + + if (!procfs) + return -1; + + snprintf(path, sizeof(path), "%s/%s", procfs, entry); + + return filename__read_str(path, buf, sizep); +} + int sysfs__read_ull(const char *entry, unsigned long long *value) { char path[PATH_MAX]; diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h index 9f6598098dc5..16c9c2ed7c5b 100644 --- a/tools/lib/api/fs/fs.h +++ b/tools/lib/api/fs/fs.h @@ -29,6 +29,8 @@ int filename__read_int(const char *filename, int *value); int filename__read_ull(const char *filename, unsigned long long *value); int filename__read_str(const char *filename, char **buf, size_t *sizep); +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); |