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author | Cody P Schafer <dev@codyps.com> | 2014-05-28 02:21:56 +0200 |
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committer | Jiri Olsa <jolsa@kernel.org> | 2014-06-03 21:34:29 +0200 |
commit | f2d9627b2b31506204417bb6842a7ea88970b700 (patch) | |
tree | 3f829a11914629a01008d0ce525f1177cc361e4f | |
parent | perf tools: Consider header files outside perf directory in tags target (diff) | |
download | linux-f2d9627b2b31506204417bb6842a7ea88970b700.tar.xz linux-f2d9627b2b31506204417bb6842a7ea88970b700.zip |
perf tools: Allow overriding sysfs and proc finding with env var
SYSFS_PATH and PROC_PATH environment variables now let the user override
the detection of sysfs and proc locations for testing purposes.
Signed-off-by: Cody P Schafer <dev@codyps.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1401236684-10579-2-git-send-email-dev@codyps.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
-rw-r--r-- | tools/lib/api/fs/fs.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index 5b5eb788996e..c1b49c36a951 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -1,8 +1,10 @@ /* TODO merge/factor in debugfs.c here */ +#include <ctype.h> #include <errno.h> #include <stdbool.h> #include <stdio.h> +#include <stdlib.h> #include <string.h> #include <sys/vfs.h> @@ -96,12 +98,51 @@ static bool fs__check_mounts(struct fs *fs) return false; } +static void mem_toupper(char *f, size_t len) +{ + while (len) { + *f = toupper(*f); + f++; + len--; + } +} + +/* + * Check for "NAME_PATH" environment variable to override fs location (for + * testing). This matches the recommendation in Documentation/sysfs-rules.txt + * for SYSFS_PATH. + */ +static bool fs__env_override(struct fs *fs) +{ + char *override_path; + size_t name_len = strlen(fs->name); + /* name + "_PATH" + '\0' */ + char upper_name[name_len + 5 + 1]; + memcpy(upper_name, fs->name, name_len); + mem_toupper(upper_name, name_len); + strcpy(&upper_name[name_len], "_PATH"); + + override_path = getenv(upper_name); + if (!override_path) + return false; + + fs->found = true; + strncpy(fs->path, override_path, sizeof(fs->path)); + return true; +} + static const char *fs__get_mountpoint(struct fs *fs) { + if (fs__env_override(fs)) + return fs->path; + if (fs__check_mounts(fs)) return fs->path; - return fs__read_mounts(fs) ? fs->path : NULL; + if (fs__read_mounts(fs)) + return fs->path; + + return NULL; } static const char *fs__mountpoint(int idx) |