perf tools: Add rm_rf() utility function

The rm_rf() function does same as the shell command 'rm -rf' which
removes all directory entries recursively.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1431909055-21442-3-git-send-email-namhyung@kernel.org
Link: http://lkml.kernel.org/r/20150130150256.GF6188@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 4ee6d0d4c9931752e76abe15dd098468c4e0c01f..6104afb7e1ef560f48c05d35681369b5b5549b7f 100644 (file)
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -72,6 +72,49 @@ int mkdir_p(char *path, mode_t mode)
        return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0;
 }
 
+int rm_rf(char *path)
+{
+       DIR *dir;
+       int ret = 0;
+       struct dirent *d;
+       char namebuf[PATH_MAX];
+
+       dir = opendir(path);
+       if (dir == NULL)
+               return 0;
+
+       while ((d = readdir(dir)) != NULL && !ret) {
+               struct stat statbuf;
+
+               if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+                       continue;
+
+               scnprintf(namebuf, sizeof(namebuf), "%s/%s",
+                         path, d->d_name);
+
+               ret = stat(namebuf, &statbuf);
+               if (ret < 0) {
+                       pr_debug("stat failed: %s\n", namebuf);
+                       break;
+               }
+
+               if (S_ISREG(statbuf.st_mode))
+                       ret = unlink(namebuf);
+               else if (S_ISDIR(statbuf.st_mode))
+                       ret = rm_rf(namebuf);
+               else {
+                       pr_debug("unknown file: %s\n", namebuf);
+                       ret = -1;
+               }
+       }
+       closedir(dir);
+
+       if (ret < 0)
+               return ret;
+
+       return rmdir(path);
+}
+
 static int slow_copyfile(const char *from, const char *to, mode_t mode)
 {
        int err = -1;

diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 3601ffd3d8b48ca5a080257f7810ca7f167b62b7..c4fe38ac8c001477d4fc9104222b860ee754f270 100644 (file)
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -249,6 +249,7 @@ static inline int sane_case(int x, int high)
 }
 
 int mkdir_p(char *path, mode_t mode);
+int rm_rf(char *path);
 int copyfile(const char *from, const char *to);
 int copyfile_mode(const char *from, const char *to, mode_t mode);